Honeywell W7750A User Manual

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74-2958-1

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Excel 10

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W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

SYSTEM ENGINEERING

Introduction.................................................................................................................................. 6

Description of Devices.......................................................................................... 6

Control Application........................ ...... ................................................................. 7

Control Provided................................................................................................... 7

Products Covered................................................................................................. 8

anization of Manual........................................................................................ 8

Applicable Literature.................................. ..... ...... ................................................ 8

Product Names..................................................................................................... 9

ency Listings .................................................................................................... 9

Abbreviations and Definitions............................................................................... 10

Construction......................................................................................................... 11

Controllers ...................................................................................................... 11

PERFORMANCE SPECIFICATIONS......................................................... 13

ONMARK

Inputs/Outputs: ............................................................................................... 18

ANALOG INPUTS:...................................................................................... 18

DIGITAL INPUTS:....................................................................................... 19

TRIAC OUTPUTS ON THE

DIGITAL OUTPUTS:................................................................................... 19

Wall Modules .................................................................................................. 20

Duct Sensor .................................................................................................... 20

urations...................................................................................................... 22

Confi

General ........................................................................................................... 22

Allowable Heatin

STAGED HEATING/COOLING CONTROL................................................ 24

MODULATING HEATING/COOLING CONTROL....................................... 24

HEAT PUMP CONTROL............................................................................. 24

ECONOMIZER CONTROL......................................................................... 25

PNEUMATIC ACTUATOR CONTROL........................................................ 25

MIXED-OUTPUT-TYPE CONTROL........................................................... 26

Occupanc Window Open/Closed Di

Wall Module Options ....................................................................................... 26

Filter Monitor .......................................................................................... 27

Dirt Indoor Air Qualit

Smoke Control ................................................................................................ 27

Freeze Stat ..................................................................................................... 27

Modes of Operation.............................................................................................. 27

® Functional Profile..................................................................... 17

W7750B,C MODELS ONLY):........................ 19

and Cooling Equipment Configurations ............................ 24

Sensor ......................................................................................... 26

ital Input ................................................................. 26

IAQ) Override .. ...... ........................................................... 27

Application Steps.................................................................................................................................. 29

Overview .............................................................................................................. 29

Step 1. Plan the S

Step 2. Determine Other Bus Devices Required.................................................. 29

Step 3. La

Power Wiring .................................................................................................. 32

Step 4. Prepare Wirin

® U.S. Registered Trademark

Cop

Out Communications and Power Wiring........................................... 30

ONWORKS

POWER BUDGET CALCULATION EXAMPLE .......................................... 32

LINE LOSS...................................... ..... ...... ..... ...... ..................................... 33

stem....................................................................................... 29

® Bus Layout ................................................................................ 30

Diagrams......................................................................... 35

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

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General Considerations .................................................................................. 35

W7750 Controllers .......................................................................................... 36

FACTORY DEFAULT DIGITAL OUTPUTS:................................................ 37

ONWORKS

Step 5. Order E

® Bus Termination Module ........................................................... 43

uipment ..................................................................................... 45

Step 6. Configure Controllers............................................................................... 48

Step 7. Troubleshootin

Troubleshootin

Excel 10 Controllers and Wall Modules ............................... 48

Temperature Sensor and Setpoint Potentiometer Resistance Ranges .......... 49

Alarms ............................................................................................................ 49

Broadcastin

the Service Message ................................................................ 50

W7750 Controller Status LED ........................................................................ 50

T7770C,D Wall Module B T7560A,B Di

ital Wall Module Bypass Pushbutton and LCD Display Occupancy

Symbols .......................................................................................................... 51

Appendices.................................................................................................................................. 51

Appendix A. Usin

E-Vision to Commission a W7750 Controller......................... 51

Sensor Calibration .......................................................................................... 51

the Pid Parameters ............................................................................ 51

Settin

Appendix B. Se

uences of Operation. ................................................................. 52

Common Operations ........................ ............................................................. . 53

Room Temperature Sensor Remote Setpoint

Setpoint Limits (LoSetptLim and HiSetptLim)............................................. 55

pass Mode (StatusOvrd and StatusLed)................................................ 55

BYPASSTIME............................................................................................. 55

OverrideT OverridePriorit

cles per Hour (ubHeatCph and ubCoolCph).......................................... 55

pe.............................................................................................. 55

........................................................................................... 55

T7770C,D or T7560A,B Wall Module Bypass Pushbutton Operation......... 55

Standb

Mode (StatusOcySen).................................................................. 56

Continuous Unoccupied Mode ................................................................... 56

Occupanc Time Clock

Mode and Manual Override Arbitration.................................... 56

Occ_Time_Clock)................................................................... 57

Schedule Master

Setpoint Ramping....................................................................................... 57

Recover

Ramping for Heat Pump Systems.............................................. 57

Fan Operation............................................................................................. 58

Window Sensor

Smoke Control............................................................................................ 58

Demand Limit Control

Dirty Filter Monitor...................................................................................... 59

Start-Up...................................................................................................... 59

Temperature Control Operations .................................................................... 59

ed Cooling Control .............................................................................. 60

Sta

ed Heating Control.............................................................................. 60

Sta Cascade Control of Modulatin Series 60 Modulatin Pulse Width Modulatin Outdoor Air Lockout of Heatin

Economizer Damper Control ...................................................................... 61

Indoor Air Qualit

Freeze Stat................................................................................................. 62

Dischar

e Air Low Limit Control................................................................. 62

Economizer Enable/Disable Control........................................................... 62

Appendix C. Complete List of Excel 10 W7750 Controller User Addresses. ....... 62

User Address Indexes

Mappable User Addresses and Table Number ............................................... 64

Failure Detect User Addresses and Table Number ........................................ 65

Appendix D. Q7750A Excel 10 Zone Mana

Approximate Memor

Appendix E. Sensor Data for Calibration. ............................................................110

Resistance Sensors. ...................................................................................... 110

e/Current Sensors. ............................................................................... 112

Volta

....................................................................................... 48

pass Pushbutton and Override LED ..................... 51

RmTemp)....................................................... 54

RmtStptPot)................................................................... 55

Sched_Master).............................................................. 57

StatusWndw)................................................................... 58

DLC)...................................................................... 58

Cooling/Heating........................................ 61

Control..................................................................... 61

PWM) Control..................................................... 61

/Cooling..................................................... 61

IAQ) Override ............................................................... 62

all in alphabetical order) ............................................ 63

er Point Estimating Guide...............109

Size Estimating Procedure. .........................................1 09

72-2958—12

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

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List of Figures

Fig. 1. Typical system overview. ................................................................................................................................................ 6

. 2. Typical W7750 control application. ................................................................................................................................. 7

. 3. Excel 10 W7750A Constant Volume AHU Controller. ..................................................................................................... 12

Fi Fi

. 4. W7750A construction in in. (mm). ................................................................................................................................... 13

. 5. Excel 10 W7750B Constant Volume AHU Controller. ..................................................................................................... 14

. 6. Excel 10 W7750C Constant Volume AHU Controller. .................................................................................................... 15

Fi Fi

. 7. W7750B,C construction in in. (mm). W7750C (shown) has three 4 to 20 mA analog outputs.) ..................................... 16

. 8. DIN rail adapters. ............................................................................................................................................................ 17

. 9. Functional profile of LONM

are

. 10. T7770A,B,C,D construction in in. (mm). ....................................................................................................................... 20

. 11. T7560A,B construction in in. (mm). ............................................................................................................................... 21

Fi Fi

. 12. C7770A construction in in. (mm). ............................... ...... .............................................................. ............................... 21

. 13. Fan with two stages of heating and two stages

of coolin

. 14. Fan, modulating heating and modulating cooling. ......................................................................................................... 24

. 15. Heat pump with two compressors and auxiliary heat stage(s)....................................................................................... 25

. 16. Economizer control. ...................................................................................................................................................... 25

Fi Fi

. 17. Modulating heat with pneumatic valve actuator............................................................................................................. 26

. 18. Connecting the portable operator terminal

to the L

. 19. Wiring layout for one doubly terminated daisy-chain LONW . 20. Wiring layout for two singly terminated LONW

. 21. NEMA class 2 transformer voltage output limits............................................................................................................ 34

Fi Fi

. 22. Power wiring details for one Excel 10 per transformer. ................................................................................................. 34

. 23. Power wiring details for two or more Excel 10s per transformer. .................................................................................. 34

. 24. Transformer power wiring details for one Excel 10 used in UL 1995 equipment (U.S. only)......................................... 35

Fi Fi

. 25. Attaching two or more wires at terminal blocks.............................................................................................................. 36

. 26. W7750B High-Side/Low-Side selectable switching and jumper location.............................................................. ...... ... 36

. 27. Typical W7750A Controller AHU application wiring diagram. (For more information on note 2,

refer to Fi

. 28. Typical W7750A Controller with separate transformer application wiring diagram.

........................................................................................................................................................................ 18

........................................................................................................................................................................... 24

ONWORKS

® Bus..................................................................................................................................................... 29

. 25.)................................................................................................................................................................ 38

For more information on note 2, refer to Fig. 25.)............................................................................................................ 38

. 29. W7750A Controller floating economizer damper wiring diagram. (For more information on note 2, refer to Fig. 25.)... 39 . 30. Typical W7750B Controller wi th staged heating and cooling wiring diagram. (For more information on note 2, ref er to Fig.

.................................................................................................................................................................................... 40

25.

. 31. W7750B Controller with floating heating, cooling and economizer wiring diagram. (For more information on note 2, refer

. 25.)......................................................................................................................................................................... 40

to Fi

. 32. W7750B,C Controller PWM damper actuator wiring diagram. (For more information on note 2, refer to

. 25.)............................................................................................................................................................................. 41

. 33. W7750B,C wiring diagram with 4 to 20 mA enthalpy sensors and digital inputs. (For more information on note 2, refer to

. 25.)............................................................................................................................................................................. 41

. 34. W7750B,C wiring diagram with C7600C 4 to 20 mA solid state humidity sensor. (For more information on note 2, refer to

. 25.)............................................................................................................................................................................. 42

. 35. W7750C Controller with 4-to-20 mA heating, cooling and economizer wiring diagram. AOs must use terminals 16, 17 or

18. The AOs can be set to be reverse actin

. 36. Pneumatic transducer to W7750B,C

B shown, see triangle note 4). ......................................................................................................................................... 43

. 37. RP7517,B pneumatic transducer to W7750C................................................................................................................ 43

. 38. Typical doubly terminated daisy-chain LONW

. 39. LONW

Fi Fi

. 40. Temperature sensor resistance plots............................................................................................................................. 49

. 41. Location of the Service Pin Button................................................................................................................................. 50

. 42. LED location on W7750. ................................................................................................................................................ 51

Fi Fi

. 43. The T7770C,D Wall Modules LED and Bypass pushbutton locations........................................................................... 51

. 44. The T7560A,B Digital Wall Module Bypass pushbutton location................................................................................... 51

. 45. LED and Bypass pushbutton operation. ....................................................................................................................... 56

Fi Fi

. 46. Setpoint ramping parameters with ramp rate calculation............................................................................................... 57

. 47. Setpoint ramping parameters with setpoint calculation.................................................................................................. 58

ORKS

® Bus termination wiring options. ............................................................................................................... 45

ARK

® RTU object details (variables not implemented in Excel 10 CVAHU

ORKS

® Bus segment. ........................................................ 31

ORKS

® Bus segments............................................................................. 32

. (For more information on note 2, refer to Fig. 25.).................................... 42

ORKS

® Bus segment termination module wiring diagram. ..................... 44

3 74-2958—1

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

Fig. 48. Setpoint ramping parameters with ramp rate calculation............................................................................................... 58

. 49. Schematic diagram for a typical W7750B Unit. .............................................................................................................59

Fi Fi

. 50. Staged output control versus PID Error. ....................................................................................................................... 60

. 51. Point capacity estimate for Zone Manager. ..................................................................................................................109

. 52. Graph of Sensor Resistance versus Temperature............................................................................................. ........... . 110

Fi Fi

. 53. Graph of Sensor Resistance versus Temperature............................................................................................. ........... . 110

. 54. Graph of Sensor Resistance versus Temperature............................................................................................. ........... . 111

. 55. Graph of Sensor Resistance versus Temperature............................................................................................. ........... . 111

Fi Fi

. 56. Graph of Sensor Resistance versus Temperature............................................................................................. ........... . 112

. 57. Graph of Sensor Voltage versus Humidity...................................... ........... ........... ............ ........... ........... ...... ........... ...... 112

. 58. C7600C output current vs. humidity............................................................................................................................... 112

Fi Fi

. 59. Graph of Sensor Current versus Enthalpy (volts)...................................... ........... ............ ........... ..... ............ ........... ...... 113

. 60. Partial psychometric chart for a C7400A Solid State Enthalpy Sensor. ........................................................................114

. 61. C7400A Solid State Enthalpy Sensor output current vs. relative humidity. ............................................................. ...... 114

Fi Fi

. 62. Graph of Sensor Voltage versus CO2 concentration..................................................................................................... 115

. 63. Graph of Sensor Voltage versus input Voltage to A/D.................................................................................................. 115

. 64. Graph of Sensor Voltage (Vdc) versus Pressure (Inw).................................... ........... ........... ........... ............ ........... ..... . 116

74-2958—14

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

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List of Tables

Table 1. Agency Listing. ............................................................................................................................................................. 9

Table 2. List of Differences in W7750A and W7750B,C Controllers........................................................................................... 11

Table 3. Common Confi Table 4. Confi

uration Options Summary For W7750A,B,C Controllers.................................................................................... 23

Table 5. Modes Of Operation For The Excel 10 W7750 Controller ........................................................................................... 27

Table 6. Application Steps.......................................................................................................................................................... 29

Table 7. L

ONWORKS

Table 8. VA Ratin Table 9. Field Wirin

Table 10. W7750A Version I/O Description................................................................................................................................ 37

Table 11. Excel 10 W7750 Controller Orderin

Table 12. Excel 10 Alarms.......................................................................................................................................................... 49

Table 14. Common Confi Table 15. Confi Table 16. B

uration Options Summary For W7750A,B,C Controllers.................................................................................. 54

pass Pushbutton Operation.................................................................................................................................... 55

Table 17. Intersta Table 18. Excel 10 W7750 Controller User Address Point T

pes................................................................................................................................................................... 62

Table 20. Input/Output Points..................................................................................................................................................... 67

Table 21. Control Parameters..................................................................................................................................................... 73

Table 22. Ener

Management Points........................................................................................................................................ 78

Table 23. Status Points............................................................................................................................................................... 81

Table 24. Calibration Points........................................................................................................................................................ 93

Table 25. Confi Table 26. L

uration Parameters........................................................................................................................................... 94

ONMARK

Table 27. Direct Access And Special Points..................................................................................................... ........... ............ ... 106

Table 28. Data Share Points.................................................................................................................................................... ... 108

Table 29. Sensor Resistance Versus Temperature.......................................................................................... ........... ............ ... 110

Table 30. Sensor Resistance Versus Temperature.......................................................................................... ........... ............ ... 110

Table 31. Sensor Resistance Versus Temperature.......................................................................................... ........... ............ ... 111

Table 32. Sensor Resistance Versus Temperature.......................................................................................... ........... ............ ... 111

Table 33. Sensor Resistance Versus Temperature.......................................................................................... ........... ............ ... 111

Table 34. Sensor Volta Table 35. Sensor Volta Table 36. Sensor Current Versus Enthalp Table 37. Sensor Volta Table 38. Sensor Volta Table 39. Sensor Volta

uration Options Summary For W7750A,B,C Controllers..................................................................... 22

® Bus Configuration Rules And Device Node Numbers............................................................................. 30

s For Transformer Sizing.............................................................................................................................. 33

Reference Table (Honeywell listed as AK#### or equivalent).................................................................. 36

Information....................................................................................................... 46

uration Options Summary For W7750A,B,C Controllers................................................................... 53

e Minimum Times.......................................................................................................................................... 60

®/Open System Points................................................................................................................................ 97

e Versus Humidity................................................................................................................................ 112

volts)............................... ........... ........... ........... ...... ........... ........... ........... ............ ... 113

e Versus CO2 Concentration............................................................................................................... 115

e Versus Input Voltage To A/D............................................................................................................. 115

Vdc) Versus Pressure (Inw)........................... ........... ............ ........... ..... ............ ........... ........... ......... 116

5 74-2958—1

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Excel 10 W7750A,B,C Constant Volume AHU Controller

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

INTRODUCTION

Description of Devices

The W7750 is the Constant Volume Air Handling Unit

CVAHU) Controller in the Excel 10 product line family. The

CVAHU is a LONM

le zone and heat pump air handlers. W7750 systems

sin control the space temperature in a the heating and cooling equipment in the air handler that delivers air to that space. The W7750 air handler is t an all-in-one constant air volume packa the roof of the building. In addition to standard heating and

control, the W7750 provides many options and

coolin advanced s

stem features that allow state-of-the-art commercial building control. The W7750 Contro ller is capa ble of stand-alone operation; however, optimum functional benefits are achieved when the network communication capabilities are used. The W7750 utilizes the Echelon



ARK

compliant device designed to control

iven zone by regulating

ed unit, located on

Q7752A

ONWORKS BUS

L SERIAL ADAPTER

pically



ONWORKS

L and conforms with the L



network (LONW

ORKS

ONMARK

Bus) for communications,

HVAC Interoperability

standard for Roof Top Unit Controllers (see Fig. 9). The T7770 or T7560 direct-wired Wall Modules are used in

con

unction with W7750 Controllers. The zone controlled by

the W7750 Controller t

pically can use a T7770A thr ough D or a T7560A,B Wall Module. Additional features available in T7770A throu override di

ONWORKS

h D models include analog setpoint input knob,

ital input pushbutton, override status LED and

Bus network access jack. Additional features available in T7560A,B models include analog setpoint input knob, override di

ital input pushbutton, humidity sensor

T7650B model), override status LCD and digital displ ay.

The Q7750A Excel 10 Zone Mana interface that allows devices on the L

er is a communications

ONWORKS

Bus network

to communicate with devices on the standard EXCEL 5000

stem C-Bus. Fig. 1 shows an overview of a typical system

out. The Q7750A also provides some control and

la monitoring functions.

C-BUS COMMUNICATION NETWORK

PERSONAL COMPUTER TOOLS E-VISION CARE

ONWORKS-BUS COMMUNICATIONS NETWORK

EXCEL 10 W7750B CVAHU CONTROLLER

Q7751A FTT

ONWORKS BUS

L ROUTER

EXCEL 10 T7770 WALL MODULE

31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16

234

567

10 11 12 13 1

415J3

Fig. 1. Typical system overview.

EXCEL 10 Q7750A ZONE MANAGER

C-BUS TO L INTERFACE DEVICE

ONWORKS BUS COMMUNICATIONS NETWORK

ONWORKS BUS

EXCEL BUILDING SUPERVISOR

EXCEL 10 T7560A, B WALL MODULE

EXCEL 10 W7751F PANEL PLENUM MOUNT VERSION VARIABLE AIR VOLUME CONTROLLER

EXCEL 500

Q7740A 2-WAY REPEATER

M17487

74-2958—16

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

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Control Application

W7750 systems in commercial build ings typically incorporate a packaged air handler system that delivers a constant volume of air at preconditioned temperatures to the zone

served. Each zone is usually serviced by a separate

bein AHU; however, sometimes two or more AHUs service the same zone. Note that the W7750 is not desi Variable Air Volume

VAV) air handlers or Multi-Zone air handlers, where one air handler simultaneously controls the space temperature in man

OA TEMP

OUTDOOR AIR

zones.

ned to control

FILTER

The W7750 can control sta

coils, mixed air economizer dampe rs, and the system

coolin

ed or modulating heating and

fan. Control of heat pump units, where the compressor(s) is used for both coolin

and heating, is also provided. The zone the W7750 services can use a T7770 or T7650 for space temperature sensin for users. Fi

FAN

and an LONW

. 2 shows a typical W7750 control application.

COOL COIL

EXCEL 10 W7750 CVAHU

HEAT COIL

ORKS

Bus network access

RA TEMP

RETURN AIR

WINDOW CONTACT

Fig. 2. Typical W7750 control application.

Control Provide d

The W7750 Controller is designed to control a single air handler to maint ain the units spa ce tempe ratur e at th e curre nt setpoint. Heatin

ed or modulating equipment. Up to four stages of

sta mechanical cooli ng and up to four stages of heating are allowed. Modulatin as a Series 6 0 control, or Pulse Width Modulated W7750B,C only) control.

The economizer dampers can be controlled directl floating or PWM outputs, or indirectly using a digital output as an enable/disabl e si The economizer enab le functio n, which dec ides when to allow outdoor air to be used for free coolin

and cooling control is provided for either

outputs can be either

floating type

such

PWM

with

nal to a packaged economizer cont roller.

, can be configured to

T7770 OR T7560A,B

one of ten strate see Appendix B—Se

DA TEMP

OCCUPANCY SENSOR

DISCHARGE AIR

ies based on the inputs. For more details,

uences of Operation. When the

ROOF

CEILING

M17488

economizer position is controlled from the W7750, the minimum position settin

usted based on indoor air quality (IAQ) needs in the space.

for ventilation requirements) can be

IAQ monitoring is provided through either a CO2 sensor or a

ital input from a space-mounted IAQ limit switch.

di For heat pump confi

controlled, alon heat/cool chan

urations, up to four compressors can be

with up to four stages of auxiliary heat, and a

e over valve. Including the supply fan, the combination of these items may not exceed eight outputs if a W7750B,C is used, or six outputs for a W7750A. outputs on the W775 0C consi st of five di

ital and three analog

The eight

outputs.

7 74-2958—1

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

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Like the W7751 V AV Box Controller, the W7750 Contro ller can monitor a space-mounted occupanc window contact. These inputs affect the operational mode of the controller operation

The W7750 Controller a llows other con trollers in the s use the W7750s ph and an analog input can be configured to read switch states and volta over the L Manager can use th ese values in custom control strategies. Additionall control pro sent over the network, and are not controlled by the W7750 internal control al

see Table 5 for a list of all possible modes of

sical inputs and outputs. A digital input

e sensor values, respectively, and send them out

ONWORKS

, two of the W7750 digital outputs are av ai lab le for

ram use. These outputs only respond to signals

Bus network. The Q7750A Zone

orithms.

sensor, and a door/

stem to

Products Covered

This System Engineering Guide describes how to apply the Excel 10 family of W7750 CVAHU Controllers and related accessories to t covered include:

• W7750A,B,C Controllers.

• T7770A throu

• T7560A,B Wall Modules.

• Q7750A Excel 10 Zone Mana

• Q7751A,B Router

• Q7752A Serial Interface.

• Q7740A,B Repeaters

• 209541B FTT Termination Module.

pical application s. The specific devices

h D Wall Modules.

er.

FTT to FTT and TPT to FTT).

2-way and 4-way).

Form No. Title

74-2956 Excel 10 W7750A,B,C Controll er Spe ci fic ati on

74-2697 Excel 10 T7770A,B,C,D,E,F,G Wall Module

74-3097 T7560A,B Di

74-2950 Excel 10 Q7750A, Zone Mana

74-2952 Excel 10 Q7751A,B Router Specification Data 74-2954 Excel 10 Q7752A Serial Interface Spec ification

74-3067 Q7752B PCMCIA LONW

74-2858 Excel 10 Q7740A,B FTT Repeaters

74-2951 Excel 10 Q7750A Zone Mana

95-7521 Excel 10 W7750A,B,C Controller Installation

95-7538 Excel 10 T7770A,B,C,D,E,F,G Wall Module

Data

Specification Data

ital Wall Module Specification

Data

Specification Data

and Test Manual

Instructions

Installation Instructions

er Specification

ORKS

PCC-10 Card

er Checkout

Organization of Manual

This manual is div ide d into three basic parts: the Introducti on, the Application Steps, and the Appendices that provide supportin Steps 1 through 5 provide the information needed to make accurate material orderin the Appendices include confi started using Excel E-Vision PC Software after the devic es and accessories are ordered. Application Step 7 is troubleshootin

The or en changing an existing system, the Table of Contents can provide the relevant information.

information. The Introduction and Application

decisions. Application Step 6 and

uration engineering that can be

anization of the manual assumes a project is being

ineered from start t o finish. If an operato r is adding to, or is

Applicable Literature

The following list of documents contain s informati on related to the Excel 10 W7750 CVAHU Controller and the EXCEL 5000 OPEN SYSTEM in

eneral.



95-7620 T7560A,B Di

Instructions

95-7509 Excel 10 Q7750A Zone Mana

Instructions

95-7510 Excel 10 Q7751A,B Router Installation

Instructions

95-7511 Excel 10 Q7752A Serial Interface Installation

Instructions

95-7613 Q7752B PCMCIA L

Installation Instructions

95-7555 Excel 10 Q7740A,B FTT Repeaters Installa tion

Instructions

95-7554 Excel 10 209541B Termination Module

74-2588 Excel E-Vision User’s Guide 74-5587 CARE User’s Manual 74-1392 CARE Excel 10 Zone Mana 74-5577 CARE Icon Guide

Installation Instructions

ital Wall Module Installation

er Installation

ONWORKS

PCC-10 Card

er User’s Guide

74-2039 XBS User’s Manual 74-5018 XBS Application Guide

74-2958—18

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

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Product Names

The W7750 Controller is available in three models:

W7750A

•

Version.

W7750B

•

Version.

W7750C

•

Version. The T7770 Wall Module is available in four models. The T7770 Wall Modules will work with all Excel 5000 and Excel 10 Controllers

T7770A1xxx

•

NTC sensor onl

T7770A2xxx

•

NTC sensor and L

T7770B1xxx

•

NTC sensor, 10 Kohm setpoint, a nd L

T7770C1xxx

•

NTC sensor, 10 Kohm setpoint, b

and L

T7770D1xxx

•

NTC sensor, b

ack.

Constant Volume AHU Controller - W7750A Constant Volume AHU Controller - W7750B Constant Volume AHU Controller - W7750C

except the W7751A,C,E,G):

Wall Module with nonlinearized 20 Kohm

ONWORKS

Wall Module with nonlinearized 20 Kohm Wall Module with nonlinearized 20 Kohm

ONWORKS

Bus jack.

Wall Module with nonlinearized 20 Kohm

pass button and LED, and LONW

Bus jack.

ONWORKS

pass button and LED,

Bus jack.

ORKS

Bus

NOTE: The T7770B,C Models are available with a absolute

The T7560A,B Wall Module is available in two models:

•

Other products:

•

Refer to Table 11 in Appli cation Step 5. Order E complete listing of all available part numbers.

NOTE: The Q7750A Zone Ma na

55 to 85°F adjustable in E-Vision to ± 18°F (± 5°C).

T7560A

temperature, setpoint, Oc c/Unocc ov erride, overrid e status LCD and di

T7560B

temperature, humidit override, override status LCD and digital display.

Q7750A Q7751A,B Q7752A Q7740A,B 209541B

Wall Module displays and provides space

Wall Module displa

Excel 10 Zone Mana Serial Adapter.

FTT Termination Module.

in internal software and CARE.

10 to 85°C) or a relative scale plate

ital display.

s and provides space

sensor, setpoint, Occ/Unocc

er.

Bus Router. FTT Repeaters.

uipment for a

er is referred to as (E-Link)

Agency Listings

Table 1 provides information on agency listings for Excel 10 products. Be sure to always follow Local Electrical Codes.

Device Agency Comments

W7750A,B,C Controllers

T7770A,B,C,D and T7560A,B Wall Modules

Q7750A Ex cel 10 Zone Manager

Q7740A,B FTT Repeaters, Q7751A,B Routers and

Q7752A Serial Adapter

Table 1. Agency Listing.

UL Tested and listed under UL916

Controllers are UL94-5V listed and suitable for plenum mounting.

cUL Listed

CE Gene ral Imm un ity per European Consortium Standards EN50081-1 (CISPR 22, Class B)

FCC Complies with re

UL(Not applicable.

cUL(Not applicable.

FCC(Not applicable.

UL Tested and listed under UL916, file number S4804 CSA Listin FCC Complies with requirements in FCC Part 15 rules for a Class A Computing Device.

UL UL1784.

CSA Listed. FCC Complies with re

E87741).

and EN 50082-1:1992 EN 61000-4-2: IEC 1000-4-2 (IEC 801-2) Electromagnetic Discharge. EN 50140, EN 50204: IEC 1000-4-3 EN 61000-4-4: IEC 1000-4-4

EN 55022: 1987 Class B. CISPR-22: 1985.

Operation in a residentia l area can ca use interfe rence to radio or TV reception and require the operator to take steps necessar

pending.

Operation in a residentia l area can ca use interfe rence to radio or TV reception and re the operator to take steps necessary to correct the interference.

based on Residential, Commercial, and Light Industrial).

Electrical Fast Transient (Burst). Radiated Emissions and Conducted Emissions:

uirements in FCC Part 15 rules for a Class B Computing Device.

file number E87741). The CVAHU W7750A,B,C

IEC 801-3) Radiated Electromagnetic Field. IEC 801-4

to correct the interference.

QVAX, PAZY).

uire

9 74-2958—1

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

g eq

(

gory

Abbreviations and Definitions

AHU

Air Handling Unit; the central fan system that includes the blower, heating equipment, co oling equipment, ventilati on air e

CO

Carbon Monoxide. Occasio nall

indoor air quality.



Carbon Dioxide. Often used as a measu r e of indo or air

uality.

CARE

Computer Aided Regulation Engineering; the PC based tool used to confi devices.

C-Bus

Hone communications between EXCEL 5000 controllers and components.

CPU

Central Processin

SYSTEM controller module.

cUL

Underwriters Laboratorie s Canad a

CVAHU

Constant Volume AHU; refers to a t handler with a sin amount of suppl

DDF

Delta Degrees Fahrenheit.

D/X

Direct Expansion; refers to a t where refri heat-exchanging coil that is mounted in the air stream supplied to the conditioned space.

Echelon

The compan

and the Neuron chips used to communicate on the

ONWORKS

Economizer

the quantity of outdoor air that enters the building. In cool outdoor conditions, fresh air can be used to supplement the mechanical coolin Because this action saves energy, the dampers are often referred to as

EMI

Electroma

cause problems with communications signals.

E-Link

Refers to the Q7750A Zone Mana

used in internal software and in CARE software.

EMS

and al

Management System; refers to the controllers

Ener

orithms responsible for calculating optimum operational parameters for maximum ener the building.

EEPROM

Memor

Electricall

; the variable storage area for saving user

setpoint values and factory calibration information.

Enthalpy

EPROM

The ener

pound

KiloJoules per Kilogram).

Erasable Programmable Read Only Memory; the firmware that contains the control al Excel 10 Co ntroller.

uipment, and other related equipment.

used as a measure of

ure C-Bus and LONW

well proprietary Control Bus for



System

Unit; an EXCEL 5000 OPEN

pe of air

le-speed fan that provi des a cons tant

air to the space it serves.

pe of mechanical cooling

erant is (expanded) to its cold state, within a

that developed the LONW

Bus.

Refers to the mixed-air dampers that re

uipment.

economizer dampers

netic Interference; electrical noise that can

er. This name is

Erasable Programmable Read Only

content of air measured in BTUs per

orithms for the

ORKS

Bus

ORKS

Bus

ulate

savings in

Excel 10 Zone Manager

interface between the C-Bus and the L

A controller that is used to

ONWORKS

The Excel 10 Zone Manager also has the functionality of an Excel 100 Controller, but has no ph

sical I/O

points.

NOTE: The Q7750A Zone Mana

er can be referred to as

E-Link in the internal software, CARE.

E-Vision

User interface software used with devices that

operate via the FTT L

ONWORKS

Bus communications

protocol.

Firmware

Software stored in a nonvol ati le mem or

such as an EPROM.

Floating Control

a valve or damper. Floatin

Refers to Series 60 Modulatin

Control utilizes one digital output to pulse the actuator open, and another digital output to pulse it closed.

FTT

Free Topolo

IAQ

Indoor Air Quality. Refers to the quality of the air in the

Transceiv er.

conditioned space, as it relates to occupant health and comfort.

I/O

Input/Output; the ph

sical sensors and actua tors

connected to a controller.

I x R

I times R or current times resistance; refers to Ohms

Law: V = I x R.

K Level IV

rees Kelvin.

Refers to a classification of di wire. Formerly known as UL Level IV, but to Cate compatibilit

IV cable. If there is any question about wire

, use Honeywell-approved cables (see Step

ital communication

not

5 Order Equipment section).

ONWORKS

LONW

NEC

NEMA

Node

Bus

Echelons LONW

communication amon

Bus Segment

ORKS

containin can be

no more than 60 Excel 10s. Two segments

oined together using a router.

ORKS

network for

Excel 10 Controllers. An LONW

ORKS

Bus section

National Electrical Code; the body of standards for

safe field-wirin

practices.

National Electrical Manufacturers Association; the standards developed b for safe field wirin

an organization o f companies

practices.

A Communications Connection on a network; an

Excel 10 Controller is one node on the L

ONWORKS

network.

NV

Network Variable; an Excel 10 parameter that can be

viewed or modified over the L

PC

An Personal Computer with Pentium processor capable

of runnin

Pot

Potentiometer. A variable resistance electronic

Microsoft Windows 95.

ONWORKS

Bus network.

component located on the T7770B,C or T7560A,B Wall Modules; used to allow user-ad

usted setpoints to be

input into the Excel 5000 or Excel 10 Controllers.

Bus.

medium

Control of

equivalent

Bus

74-2958—110

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

y sy

(

)

PWM

RTD

Subnet

TOD

TPT VA

Vac

VAV

VOC

Pulse Width Modulated output; allows analog modulatin on the controller.

Resistance Temperature Detector; refers to a t temperature sensor who se resis tan ce out put cha n according to the temperature change of the sensing element.

router from its Q7750A Zone Manager.

Time-Of-Da

Unoccupied times of operation.

Twisted Pair Transceiver.

Volt Amperes; a measure of electrical power output or

consumption as applies to an ac device. Volta

volta

Variable Air Volume; refers to either a t distribution system, or to the W7751 Excel 10 VAV Box Controller that controls a sin volume deliver

Volatile Organic Compound; refers to a class of common pollutants sometimes found in buildin Sources include outproduction-line by-products, and general cleaning solvents. A VOC is occasionall indoor air

control of equipment using a digital output

ONWORKS

A L

e alternating current; ac voltage rather than dc

Bus segment that is separated by a

; the scheduling of Occupied and

pe of air

le zone in a variable air

stem.

assing of construction materials,

used as a measure of

uality.

pe of

Construction

Controllers

The Excel 10 W7750 Controller is available in three different models. The W7750A Model, which is a low cost controller made for simple sin controls. The W7750B,C Models are intended for more complex applications.

The W7750B,C Models use Triacs for their di where as the W7750A Model uses dr W7750C Model also has three analog outputs available on terminals 16, 17 and 18.

All wirin terminal blocks. Connection for operator access to the

ONWORKS

L cable into the LONW

The W7750A,B,C Model s c on si st o f a s in is mounted in a sheet metal subbase and protected by a factor ph

W7750A) and different labels next to the wiring terminals

see Fig. 3, 5 or 6). Wires are attached to the screw terminal blocks on both sides of the controller. The controllers mount with two screws mounted usin purchase two DIN rail adapters TKAD, from Thomas and Betts, see Fig. 8, then snap onto standard EN 50 022 35 mm b DIN rail. DIN rail is available throu

connections to the controller are made at screw

Bus is provided by plugging the SLTA connector

snap-on cover. The three controllers have the same

sical appearance except for terminals 16 through 20

le zone air handlers and heat pump

-contact relays. The

ORKS

Bus communications jack.

see Fig. 4 or 7). The W7750 can also be

DIN rail. To mount the W7750 on DIN rail,

obtain locally) part number

7.5 mm (1-3/8 in. by 5/16 in.) h local suppliers.

ital outputs,

le circuit board tha t

W7750

W7751

Wall Module

XBS

Digital Outputs Digital Inputs Wall Module Analog Outputs Analog Inputs DC Power Floating (Series 60) Control PWM Control

*The T7770 or the T7560 W al l Mod ules inclu des I/O p oints for

two analo knob, a di

The model number of the Excel 10 CVAHU

Controllers

The model number of the Excel 10 VAV Box

Controllers

other optional controller inputs are contained in the T7770 or the T7560A,B Wall Modules. See Application Step 5. Order E models of Wall Modules.

Excel Buildin

monitorin

also see CVAHU).

also see VAV).

The Excel 10 Space Temperature Sensor and

uipment for details on the various

Supervisor; a PC based tool for

and changing parameters in C-Bus devices.

Table 2. List of Differences in W7750A and W7750B,C Controllers.

W7750A Model W7750B,C Models

Six Relay Outputs Eight Triac Outputs Two Four One* One* None Three 4 to 20 mA Outputs One (Resistive Input Only)Four (Two Resistive and two Voltage/Current Inputs None 20 Vdc available to power optional sensors Economizer Onl None Heating, Cooling, and/or Economizer

inputs for the space temperature and the setpoint

ital input for the Bypass pushbutton, and a digital

A channel in the cover allows the controller status LED to be visible when the cover is in place. There are no fieldserviceable parts on the circuit board and, therefore,

intended that the cover never be removed

The W7750A,B,C can be mounted in an Ventilation ope nin proper heat dissipation re See Fig. 4 and 7.

The input/output and control differences between the two models are summarized in Table 2. The I/O points in Table 2 are the free I/O points that are not reserved for Wa ll Mo dul e use.

Heating, Cooling, and/or Economizer

output for the LED B points are configurable, but are normally used for the Wall Module.

s were designed into the cover to allow

ardless of the moun ting orientation.

W7750C onl

pass Indicator. These W7750 I/O

orientati on.

it is

11 74-2958—1

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

W7750A

31 30 29 28 27 26 25

NETWORK

24 23 22

VAC

24 VAC COM

20 19 18

NOT

USED

NOT

17 16

NOT

USED

NOT

GND

LED

BYPASS

SNSR

GND

SET PT

AI-1

GND

DI-1

GND

DI-2

10 11 12

NOT

BUS

ORKS

USED

13 14 15 J3

JAC

456

OHM

789

Fig. 3. Excel 10 W7750A Constant Volume AHU Controller.

74-2958—112

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

(R)

2-1/8

(54)

31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16

WI W2 Y1 Y2 G

LED BYPASS SNSR GND SET PT AI-1

GND

123456789101112131415J3

NEYWORK

Rc Rh

GND DI-1 GND GND DI-2 NOT

OHM

5-3/16 (132)

VAC

6 (152)

NOT

VAC

USED

COM

NOT

NOT USED

USED

NOT

USED

LON

LONW

ORKS

JACK

BUS

3-1/16

(77)

5-5/8 (143)

Fig. 4. W7750A construction in in. (mm).

PERFORMANCE SPECIFICATIONS

Power:

24 V ac wi th a mi nimum of 2 0 Vac and a maximum of 30 Vac at either 50 or 60 Hz. The W7750A power consumption is 6 VA maximum at 50 o r 6 0 Hz . The W7750B,C power consumption is 12 V A ma xi mu m at 50 or 60 H z.T he W77 50A, B ,C is a NEC Class 2 rated device. This li stin of power the product ca n cons ume or directl

imposes limits on the am ount

control to a total

of 100 VA.

M10098B

Special Note for the W7750B,C Unit:

The individual Triac outputs incorporate an internal common connection with the input power transformer. The Triacs provide a switched path from the hot side transformer throu

h the load to the common of the transformer. The W7750B,C Controller design same power transformer for an controller; see Fi

. 30.

loads connected to that

of the

must

use the

Each individual Triac is rated 1A at 30 Vac maximum. Under all operatin

conditions, the maximum load/source power budget for the W7750B,C Controller is 100 VA. Actual allowable Triac current is 500 mA MAX.

13 74-2958—1

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

(

30 29 28 27 26 25

DI-4

DI-3

GND

DI-2

GND

VAC

DI-1

24 23 22 21

VAC

COM

OUT

20 19 18

OUT

17 16

OUT

LED BYPASS

GND

SNSR

SET PT AI-1

GND

456

OHM

A1-2

GND

OHM

Fig. 5. Excel 10 W7750B Constant Volume AHU Controller.

CPU:

Motorola or Toshiba 3150 Neuron processor, containin

ht-bit CPUs. Each Neuron has a unique 48-bit network

ei identification number.

Memory Capacity:

64K ROM/PROM

6K reserved for network operations, 58K

usable for control algorithm code).

tes EEPROM.

512 b 2K RAM.

AI-3

V/mA

GND

11 12

three

AI-4

20VDC

V/mA

OUT

13 14

ORKS

BUS

JACK

M6854B

Specified Space Temperature Sensing Range:

45 to 99°F from 50 to 90°F and 55 to 85°F

7 to 37°C) with an allowabl e control setpoint r ange

10 to 32°C) when initiated from the network

13 to 29°C) when configured and connected

to T7770 or T7560 Wall Modules.

74-2958—114

30 29 28 27 26 25

DI-4

DI-3

DI-2

GND

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

24 23 22 21

VAC

DI-1

COM

OUT

20 19 18

OUT

GND

LED BYPASS

SNSR

SET PT AI-1

GND

456

A1-2

OHM

GND

OHM

789

V/mA

AI-3

GND

11 12

V/mA

AI-4

20VDC

OUT

13 14

ORKS

BUS

JACK

Fig. 6. Excel 10 W7750C Constant Volume AHU Controller.

M17489

15 74-2958—1

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

(

)

(

)

(

)

2-1/8

(54)

31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16

DI-4

GND

LED

GND

123456789101112131415J3

DI-3 DI-2

BYPASS

SNSR

GND

VAC

DI-1

SET PT

AI-1

OHM

5-3/16 (132)

VAC

COM

GND

OUT

AI-2

OHM

OUT

AI-3

V/mA

6 (152)

OUT

GND

OUT

AI-4

V/mA

OUT

20VDC

OUT

LONW

BUS

ORKS

L JACK

3-1/16

(77)

5-5/8

(143)

Fig. 7. W7750B,C construction in in. (mm). W7750C (shown) has three 4 to 20 mA analog outputs.)

Communications:

The W7750A,B,C Controller uses a Free Topolo Transceiver runnin

FTT) transformer-coupled co mm uni ca tio ns port

at 78 kilobits per second (kbps). Using the

transformer-coupled communications interface offers a much

her degree of common-mode noise rejection while

hi ensurin

dc isolation.

Approved cable t wirin

is Level IV 22 AWG (0.34 mm

pes for LONW

rated unshielded, twisted pair, solid conductor wire. For nonplenum areas, use Level IV 22 AWG U.S. part AK3781 plenum areas, use plenum-rated Level IV, 22 AWG

such as U.S. part AK3791 (one pair) or U.S. part

one pair) or U.S. part AK3782 (two pair). In

AK3792 (two pair). (See Tables 9 and 11 for part numbers.) Contact Echelon Corp. Technical Support for the recommended vendors of Echelon approved cables.

74-2958—116

ORKS

Bus communications

plenum or nonplenum

0.34 mm

M17490

such as

0.34

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

g (

)

(

Fig. 8. DIN rail adapters.

The FTT supports polarit

insensitive free topology wiring. This frees the system installer from wiring using a specific bu s topolo supported b

. T-tap, star, loop, and mixed wiring topologies are all

this architecture. The maximum LONW

ORKS

Bus

length when using a combination of T-tap, star, loop, and bus

singly terminated) is 1640 ft. (500m) with the maximum

wirin node-to-node len

th of 1312 ft. (400m). In the event that the total wire length is exceeded, then a Q7 740A 2-W ay Repeater or a Q7740B 4-Wa number of devices to be spread out as well as increasin

th of wire over which they communicate. The maximum

len number of repeaters p er se

. A Q7751A,B LONW

router to effectively double the maximum LONW The advanta to a se

ment while when using the repeater, all traffic is

Repeater can be used to allow the

the

ment is one (on either side of the

ORKS

Bus Router can also be used

ORKS

Bus length.

e of using the router is that it segregates traffic

repeated on each segment. When utilizing a doubly terminated L

ONWORKS

Bus structure, use a continuous daisy-

M6857

chain with no stubs or taps from the main backbone, The maximum L

ONWORKS

maximum node-to-node len FT T netw orks are ver

maintain, but it is imperative to carefull

out and create and maintain accurate documentation. This

Bus length is 4593 ft. (1400m) with the

th of 3773 ft. (1150m).

flexible and convenient to install and

plan the network

aids in compliance verification and future expansion of the FTT network. This also keeps unknown or inaccurate wire run

ths, node-to-node (device-to-device) distances, node

len counts, total wire len and misplaced or missin

ONWORKS

Bus Wiring Guidelines form, 74-2 865 for comple te

th, inaccurate repeater/router locations,

terminations minimized. Refer to

description of network topology rules.

W7750 Controllers support the L

® FUNCTIONAL PR OFILE

ONMARK

Functional Profile

number 8030 Roof Top Unit Controller, version 1.0

see Fig. 9).

17 74-2958—1

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

(

)

(

)

(

)

(

)

(

)

(

Inputs/Outputs:

The W7750A Unit supports the foll owing hardware features:

• Three 20 Kohm NTC

• Three dry contact digital inputs (one reserved for the

• LED di

• Six 24 Vac rela

nviSpaceTemp

nv1

SNVT_temp_p

nv2

nviSetPoint SNVT_temp_p

Hardware

Output

Roof Top Unit

Controller number 8030

Mandatory

nv3

Network Variables

nv4

nvoSpaceTemp SNVT_ temp_p

nvoUnitStatus SNVT_hvac_status

1000 through 150,000 ohm) or

PT3000 (250 through 12,000 ohm) resistive analog inputs

one reserved for space temperature and one reserved for

the setpoint knob

pass pushbutton).

ital output

only

for the wall module LED) 2.5V at 3

mA.

digital outputs (1.5A relays rated at 7.5A

inrush current

nviApplicMode

nv5

SNVT_hvac_mode

nviOccCmd

nv6

SNVT_occupancy

nviSetPtOffset

nv7

SNVT_ temp_p

nviOutsideTemp

nv8

SNVT_ temp_p

nviOutsideRH

nv9

SNVT_lev_percent

nviSpaceRH

nv13

SNVT_ lev_percent

nviCO

nv14

SNVT_ppm

nviEmergCmd

nv15

SNVT_hvac_emerg

nvoEffectSetPt

nv10

SNVT_ temp_p

nvoOutsideTemp

nv11

SNVT_ temp_p

Optional Network Variables

nvoOutsideRH

nv12

SNVT_ lev_percent

nvoCO

nv16

SNVT_ppm

Configuration Properties

nc49 - Send Heartbeat (mandatory) nc60 - Occupancy Temperature Setpoints

nc17 - Location nc42 - CO2Limit

(mandatory)

(optional)nc48 - Maximum Receive Time (optional)

(mandatory)

The W7750B,C Units s upp ort the fo llowin

• Four 20 Kohm NTC PT3000

250 through 12,000 ohm) resistive analog inputs

1000 through 150,000 ohm) or

hardware features:

one reserved for space temperature and one reserved for

the setpoint knob

• Two 0.2 to 10 VDC or 2 to 20 mA

user selectable) analog

inputs.

pushbutton

• Five dr

contact digital inputs (one reserved for the Bypass

• Eight on the W7750B (five on the W7750C) 24 Vac Triac

ital outputs (500 mA MAX). The W7750C Unit also

di supports three 4 to 20 mA analo

• LED digital output

only

for the wall module LED, T7770

models or LCD, T7560A,B

• One 20 Vdc power su ppl

for auxiliary devices with a

outputs.

2.5V at 3 mA.

maximum current of 50 mA.

ANALOG INPUTS:

NOTE: Only one of each type of input is allowed. For

example, onl

one Outdoor Air Temperature sensor is allowed. No duplicate Outdoor Air Temperature sensors are usable on the same controller.

Space Temperature:

pe: RTD.

T Supported Sensors: T7770A,B,C,D; T7560A,B.

Manufacturer

Defined

Section

Discharge Air Temperature:

pe: RTD.

T Supported Sensors: C7100A1015*, C7770A1006, C7031B1033, C7031C1031, C7031D1062, C7031F1018

Hardware

Input

M11580

W7750B,C only), C7031J1050, C7031K1017.

Outdoor Air Temperature:

pe: RTD.

Fig. 9. Functional profile of LONM

® RTU object details

ARK

(variables not implemented in Excel 10 CVAHU

T Supported Sensors: C7170A1002.

are greyed).

Return Air Temperature:

pe: RTD.

Environmental:

Operatin

Temperature: -40 to 150°F (-40 to 65.5°C).

T Supported Sensors: C7100A1015*, C7770A1006, C7031B1033, C7031C1031, C7031D1062, C7031F1018

Shipping Temperature:

-40 to 150°F

-40 to 65.5°C).

Relative Humidity:

5% to 95% noncondensin

W7750B,C only), C7031J1050, C7031K1017.

*The PT3000 sensor is not recommended for floatin

real time - discharge or return configured as space sensor).

The PT3000 sensor is intended for monitoring or differential

staged) control

Vibration:

Rated V2 level compliant.

74-2958—118

control

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

(

gh q

(

)

CAUTION

(

)

Outdoor Air Humidity (W7750B,C

Type: Voltage/Current. Supported Sensors: C7600B1000 and C7600B1018

2 to 10V), C7600C1008 (4 to 20mA).

Return Air Humidity (W7750B,C

Type: Voltage/Current. Supported Sensors: C7600B1000 and C7600B1018

2 to 10V), C7600C1008 (4 to 20mA).

Outdoor Air Enthalpy (W7750B,C

Type: Current. Supported Sensors: C7400A1004

Return Air Enthalpy (W7750B,C

Type: Current. Supported Sensors: C7400A1004

Air Filter Differential Pressure (W7750B,C

Type: Voltage. Supported Sensors: Third part

1.25 kPa) differential pressure sensors.

Sensor (W7750B,C

Type: Voltage. Supported Sensors: Third part

sensors.

only):

4 to 20mA).

only):

4 to 20mA).

only):

2 to 10V, 0 to 5 inw

0 to 10V, 0 to 2000 ppm

— Dirty Filter:

Contact Closed = Dirt

— Shutdown Signal:

Contact Closed = Shut off all e

— Occupanc

Contact Closed = Room is Occupied; Contact Open = Room is Unoccupied

— Window Monitor:

Contact Closed = Window is Closed

— Coil Freeze Stat:

Contact Closed = Coil Freeze condition sensed

— Wall Module Bypass Pushbutton:

Momentar for b

TRIAC OUTPUTS ON THE (W7750B,C MODELS ONLY):

— Power ratin

MAX current for any voltage.

NOTE: Triacs sink current to the 24 Vac common

Switch:

DI (See Appendix B—Sequences of Operation

pass details.

s: 20 Vac to 30 Vac at 25 mA MIN to 500 mA

When any device is energized by a Triac, the device must be able to sink a minimum of 25 mA.

terminal on the W7750B,C Models); see Fig. 30 for

example.

wirin

Filter

uipment

Only use this DI when using E-Vision.

COM

Monitor Sensor for network use (W7750B,C

Type: Voltage. Supported Sensors: Third part displa

ed.

DIGITAL INPUTS:

NOTE: Only one of each type of input is allowed. For

Dr detection circuit. It is ver contains hi that does not degrade; that is, increase over time. Use noble metal assure consistent, lon

Two of the followin when usin the W7750B,C:

— Fan Status: — IAQ Switch: — Time Clock:

— Schedule Master:

— Economizer Enable Si — Smoke Monitor:

example, onl duplicate Smoke Monitors are usable on the same controller.

-contact inputs are sensed using a 9 milliamp at 4.8 volts uality, noncorroding contacts with resistivity

such as gold or silver), or pimpled or seale d contact s to

the W7750A, and four of the following when using

Contact Closed = Fan on Contact Closed = Poor Air Qualit Contact Closed = Occupied Mode; Contact Open =

Unoccupied Mode Contact Closed = Local time clock is used as master time

clock Contact Closed = Economizer Enabled for coolin Contact Closed = Smoke Detected

one Smoke Monitor is allowed. No

important that the device used

-term operation.

Digital Inputs (DIs) can be configured

nal:

2 to 10V, 2 to 10 volts

only):

use

IMPORTANT

If non-Honeywell motors, actuators, or transducers are to be used with Excel 10 Controllers, Triac compatibility must be verified (see previous NOTE).

DIGITAL OUTPUTS:

COOL STAGE 1 COOL STAGE 2 COOL STAGE 3 COOL STAGE 4 HEAT STAGE 1 HEAT STAGE 2 HEAT STAGE 3 HEAT STAGE 4 CHANGE OVER RELAY FAN AUX ECON OCCUPANCY STATUS ECON OPEN ECON CLOSE COOL OPEN COOL CLOSE HEAT OPEN HEAT CLOSE HEAT COOL STAGE 1 HEAT COOL STAGE 2 HEAT COOL STAGE 3 HEAT COOL STAGE 4 FREE1 are three separate and unique digital output points. Because they are not related, they all can be configured in a CVAHU controller at the same time. FREE2 FREE1 PULSE ON FREE1 PULSE OFF ECON PWM HEAT PWM COOL PWM UNUSED

NOTE:

Free1, Free1 Pulse On

Free1 Pulse Off

and

19 74-2958—1

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

(

Wall Modules

The T7770 or T7560 Wall Modules for the Excel 5000 and Excel 10 Controllers ar e available in a variet

urations. The models T7770A1006 and T7770C1002

confi are shown in Fig. 10. The T7770B,D are the same physical

size T7560A1016 and T7560B1018 are shown in Fi T7560A,B are the same physical size.

Duct Sensor

The dimensions of the C7770A duct-mounted sensor are shown in Fi

see Product Names sect ion fo r dif feren ces). The models

. 11. The

. 12.

3-5/32 (80)

KNOCKO UTS F O R EU ROPE AN APPLICATIONS

29/32 (23)

5-1/16 (128)

3-5/32 (80)

KNOCKOUTS FOR EUROPEAN APPLICATIONS

1-1/4 (32)

5-1/16 (128)

2-3/8 (60)

T7770A1006

STANDARD UTILITY CONDUIT BOX (2 X 4) MOUNTING HOLES

DIP Switch S4 Settings:

2-3/8 (60)

9 8 7 6 5 4 3 2 1

W7752

XL600-XL20

W7753

LED RETURN

1,3,5=on; 2,4=off 2,4=on; 1,3,5=off 1,2,3,4=on; 5=0ff

BYPASS

LED

SETPT

BYPASS/FAN BYPASS/FAN

SETPT

FAN

SETPT

SENSOR

GND

SENSOR

AL COM

SENSOR

GND

E-BUS

T7770C

2-3/8 (60)

Fig. 10. T7770A,B,C,D construction in in. (mm).

74-2958—120

STANDARD UTILITY CONDUIT BOX (2 X 4) MOUNTING HOLES

M15119

12345678

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

3-7/16

(86)

(100)

1-1/2 (38)

3/4 (19)

2-11/16 (68)

3-7/8 (97)

3-15/16 (99)

4-1/8 (104)

1-3/16 (30)

Fig. 11. T7560A,B construction in in. (mm).

8-1/2 (216)

1/2 (13)

1/2 IN. (13) DIAMETER

3/8 IN. (10) DIAMETER

M17479

1/4 (6) DIAMETER (2 HOLES)

7/8 (22)

1/2 (13)

Fig. 12. C7770A construction in in. (mm).

21 74-2958—1

6-5/32 (156)

3-1/2 (89)

M7724

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

(

)

Configurations

General

Tables 3 and 4 provide an overview of the Excel 10 W7750

uration options. All W7750s are assumed to have a

confi supply fan digital output. Additionally, Tables 3 and 4 list the

eneral mechanical equipment options available with the W7750 Controller. See Application Step 6. Confi Controllers, for further information on configurations.

Table 3. Common Configuration Options Summary For W7750A,B,C Controllers.

Option Possible Configurations Common To All W7750 Models Supply Fan Type of Air Handler

Occupancy Sensor

Window Sensor

Wall Module Option

The T77560A,B has no LONW

Wall Module Type

All wall modules have a LONW

ack except T7560A,B

Smoke Emergency Initiation

ORKS

Bus access)2. Network (sensor value received via the LONW

ORKS

Bus access 2. Sensor and Setpoint adjust.

ure

1. Mandator

1. Conventional.

2. Heat Pump.

1. None.

2. Connected: Contacts closed e

3. Network

1. None.

2. Ph

3. Network (Window Open/Closed signal received via the LONW

1. Local

1. Sensor only.

3. Sensor, Setpoint adjust and Bypass.

4. Sensor and Bypass.

1. None.

2. Ph

3. Network (Emergency/Normal signal received via the LONW

Digital Output.

Occ/Unocc signal received via the LONW

sically Connected: Contacts closed equals windo w closed.

direct wired to the controller).

sically Connected: Contacts closed equals smoke detected.

CAUTION

For floating control, the Excel 10 W7750 Controller is

ned to work only with Series 60 valve and

desi damper actuators. Full strok e actuator dri ve-time mu st be between 20 and 240 secon ds

uals Occupied.

0.25 to 4.0 m inu tes).

ORKS

Bus network).

ORKS

Bus).

ORKS

Bus).

74-2958—122

Option

(

)

(

)

(

)

(

)

(

)

Type of Heating

Type of Cooling

Type of Economizer

IAQ Option

Coil Freeze Stat Option

Filter Monitor Option

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

Table 4. Configuration Options Summary For W7750A,B,C Controllers.

Possible Configurations for the

W7750A Model Possible Configurations for the W7750B,C Models

1. One stage. 1. One stage.

2. Two stages. 2. Two stages.

3. Three stages. 3. Three stages.

4. Four sta

es. 4. Four stages.

5. None. 5. Series 60 Modulatin

6. Pulse Width Modulatin

7. None.

1. One sta

2. Two sta

3. Three sta

4. Four sta

e. 1. One stage.

es. 2. Two stages.

es. 3. Three stages.

es. 4. Four stages.

5. None. 5. Series 60 Modulatin

6. Pulse Width Modulatin

7. None.

1. Digital Output Enable/Disable nal for controlling an external

si economizer packa

2. Series 60 Modulatin

electric

damper motor, or pneumatic via

ital Output Enable/Disable signal for controlling an external

1. Di economizer packa

2. Series 60 Modulating electric damper motor, or pneumatic via transducer.

transducer.

3. None. 3. Pulse Width Modulatin transducer.

4. None.

1. None. 1. None.

2. Local IAQ Di

ital Input—directly

wired to the controller.

Contacts

2. Local IAQ Digital Input—directly wired to the controller. (Contacts closed means poor IAQ is detected.

closed means poor IAQ is detected.

3. Network (IAQ Override signal received via the LONW

ORKS

Bus).

3. Network (IAQ Override signal received via the LONW

4. Local CO

Analog Input—directly wired to the contro ller . (The sensor

must be a 0 to 10V device representin

1. None. 1. None.

2. Local Coil Freeze Stat Di

ital

Input—directly wired to the controller.

2. Local Coil Freeze Stat Digital Input—directly wired to the controller. Contacts closed means that coil freeze condition is sensed.

Contacts closed means that coil

freeze condition is sense d.

1. None. 1. None.

2. Local Dirty Filter Digital Input—directl controller.

wired to the

Contacts closed means

2. Local Dirty Filter Digital Input—directly wired to the controller. Contacts closed means that the filter is dirty.

that the filter is dirty.

3. Local Analog Input for Differen tial Press ure across the Filter (directly

wired to the controller). The sensor must be a 2 to 10V device representin

0 to 5 inw (1.25 kPa).

electric va lve, or pneumatic via transducer.

electric valve, or pneumatic via transducer.

electric va lve, or pneumatic via transducer.

electric valve, or pneumatic via transducer.

electric damper motor, or pneumatic via

ORKS

Bus).

0 to 2000 PPM CO2.

23 74-2958—1

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

(

g eq

)

Allowable Heating and Cooling Equipment Configurations

Each W7750 device can control a variety of different types of mechanical cooli ng and heating equipment within roof top air handlers. See Fi some t

pical configurations. For specific wiring details, see

the Prepare Wiring Diagrams section.

STAGED HEATING/COOLING CONTROL

ed equipment control is available for up to four st ages of

Sta

or four stages of cooling. On the W7750, the stages

heatin are activated through digital outputs (Triacs on t he W7750B,C

-contact relays on the W7750A) one for each stage

and dr wired to 24 Vac contactors Prepare Wiring Diagrams section for wiring details). Note that the number of ph limits the total number of sta example, the W7750A Model has six digital outputs, and because one is used for the suppl available for an

with a maximum of four stages of heating and four stages for

coolin

. The W7750B Model offers two additional DOs, for a total of ei Outputs (AOs). Fig. 13 shows a typical application of two

es of heat and two stages of cooling.

sta

MIXED AIR

. 13 through 17 for a conceptual overview of

see Fig. 27 and 30 in Step 4.

sical Digital Outputs (DOs) on the controller

es that can be controlled. For

fan, there are five DOs

combination of heating and cooling stages

ht. The W7750C offers five DOs and three Analog

HEAT

COOL

COIL

FAN

DISCHARGE AIR

positions the actuator based on the len pulse from the di

ital output. For PWM, the controller outputs

th, in seconds, of the

a pulse whose length consists of two parts, a minimum and a maximum. The minimum pulse time represents the analo value of 0 percent and the maximum pulse len

th that

represents an analog value of 100 percent. If th e analog value

reater than 0 percent, an additional time is added to the

is minimum pulse time. The len

th of time added is directly proportional to the magnitude of the analog value. The PWM actuator will be

in to use the analog value at the end of the pulse and will continue to use this value until a new pulse is received. Refer to Appendix B under PWM Control for an example. Series 60 actuators are than those for PWM, but the trade-off is that PWM re

enerally less expensive

uires only a single controller digital output while floating control uses two DOs. Refer to Appendix B under Series 60 Modulatin

Control for an example. Fig. 14 illustrates a system with modulating heating and cooling (see Fig. 29 and 31 in Step 4. Prepare Wirin

MIXED AIR

FAN STARTER

FAN

Diagrams section.

HEAT

COOL

COIL

CHILLED WATER VALVE

HOT WATER VALVE

DISCHARGE AIR

FAN STARTER

EXCEL 10

CVAHU

W7750A,B,C

COMPRESSORS

Y1 Y2

GAS COMBUSTION

CONTROLS

T7560A,B OR T7770

M17491

Fig. 13. Fan with two stages of heating and two stages

of cooling.

MODULATING HEATING/COOLING CONTROL

The W7750 Controller p rovide s mod ulatin for heatin see Fi

and cooling equipment (and economizer damp ers,

. 16) using either Series 60 Floating Control or P ulse

uipment control

Width Modulated (PWM) control, (PWM control is avail able on

only

the W7750B,C provided throu

. The Series 60 Modulating Control is

h two Relay digital outputs on the W7750A or two Triac digital outputs on the W7750B,C (one to pulse the valve actuator open and one to pulse it closed

. PWM control

EXCEL 10

CVAHU

W7750A,B,C

T7560A,B OR T7770

M17492

Fig. 14. Fan, modulating heating and modulating cooling.

NOTE: Pneumaticall

a pneumatic transducer device. See Fig. 17.

usin

actuated valves can be controlled

Also, transducer devices are available from third

vendors to convert PWM outputs to a voltage

part or current si

nal if desired.

HEAT PUMP CONTROL

The W7750 Controller handles heat pump applications similarly to staged heating/cooling control. Heat pump applications are supported b compressor sta

es, a change-over relay for the refrigerant

providing outputs for up to four

reversing valve, and up to four stages of auxiliary heat. Note that the W7750A Model has six di with one DO used for the suppl over rela

, there are four outputs available for any combination of compressors and auxiliar W7750B Model offers two additional DOs for a total of ei

ital outputs, and therefore,

fan and one for the change-

heat stages. The

ht, while the W7750C Model offers five DOs and 3 AOs. Fig. 15 illustrates a t

pical heat pump system with auxiliary heat.

74-2958—124

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

)

AUXILIARY HEAT STAGE(S)

RELAY

T7560A,B OR T7770

DISCHARGE AIR

M17493

MIXED AIR

EXCEL 10

CVAHU

W7750A,B,C

FAN

FAN STARTER

COMP 1

COMP 2

SHARED HEAT AND COOL COIL

COMPRESSOR AND CHANGEOVER V ALVE

CHANGEOVER

Fig. 15. Heat pump with two compressors and auxiliary

heat stage(s).

ECONOMIZER CONTROL

Economizer control is available concurrently with any

uration i n the W7750 when DOs are not all used by the

confi

and cooling equipment. Two types of economizer

heatin controls are supported by the W7750 Controller, modulating control and enable/disable control. Modulatin either Series 60 Floatin control is available on the W7750B,C temperature sensor is re

Control or PWM control (PWM

only

uired for modulating economizer

control can be

. A discharge air

damper control. Enable/dis ab le c ontrol is provided to emulate the Hone where a DO tracks the occupanc external packa

well T7300 thermostat economizer operation,

status of the controller. An

ed economizer control then modulates the dampers. For modulating control, the economizer is enabled or disabled based on one of ten available strate Appendix B—Se

uences of Operation—Economizer Enable/

ies (see

Disable Control section, for further details). Fig. 16 illustrates

stem with modulating economizer dampers (see Fig. 29,

a s 31, 32 and 35 in Step 4 . Prepa re Wiri n

Diagrams section, for

wiring details).

OUTDOOR AIR

PWM OR SERIES 60 FLOATING MOTOR

RETURN AIR

EXCEL 10

W7750A,B,C

CVAHU

Fig. 16. Economizer control.

PNEUMATIC ACTUATOR CONTROL

The W7750B,C Controll er can contr ol pneumat ic actuato rs for any or all of the three modulating outputs provided by the control algorithm (heat, cool and economizer). Control of pneumatic water/steam valves and damper actuators is provided throu

h a transducer device using either Series 60 Floating Control or PWM DOs. A floating-to-pneumatic, or a PWM-to-pneumatic transducer is re

nal. The W7750A Controller can drive Series 60 Floating

uired for each output

HEAT

COOL

COIL

FAN

FAN STARTER

T7560A,B OR T7770

DISCHARGE AIR

DISCHARGE TEMPERATURE SENSOR REQUIRED FOR ECONOMIZER CONTROL

M17494

Control to modulate cooling valves, heating valves and economizers. There are no PWM outputs configurable on the W7750A model.

For pro

ects with existing pneumatically actuated reheat valves, the Excel 10 W7750 Controller output must be converted to a pneumatic si

nal using a transducer device

developed for use with Excel 10 C ontrollers. The tran sducer is

25 74-2958—1

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

(

y (

(

gh q

)

(

)

(

gh q

(

)

(

available through Honeywell, or directly from the manufacturer, Mamac S

stems (see Table 11 for ordering

information). Fi

. 17 depicts a typical W775 0 System with modulating heating valve using a pneumatic valve actuator. Also see Fig. 36 for wirin W7750A,B,C Controller and Fi

an MMC325 Pneumatic Transducer to a

. 37 for wiring a RP7517B

Pneumatic Transducer to a W7750C Controller. NOTE: When choo sin

the pneumatic pressure ra nge, make sure that the close-off pressure is 2 to 3 psi greater than that of the sprin

e of 5 to 10 psi with 10 psi as the closed posi-

ran

do not

tion,

use the 0 to 10 psi model of the MMC325

range. When using a spring

Transducer; use the 0 to 20 psi transducer as the recommended selection.

HEAT COIL

MIXED AIR

STARTER

FAN

MMC325

PNEUMATIC MAIN OR BRANCH LINE MUST BE 1/4 IN. (6 MM) OR LARGER TUBING. A MINIMUM OF 6 FT (1.8M) OF TUBING IS NEEDED IN A BRANCH LINE.

PNEUMATIC ACTUATOR

VALVE

PNEUMATIC TRANSDUCER

DISCHARGE AIR

T7560A,B OR T7770

M17495

Fig. 17. Modulating heat with pneumatic valve actuator.

MIXED-OUTPUT-TYPE CONTROL

The W7750B,C Controller provides control for mixed-output-

pes of applications such as PWM heating and staged

control occurring simultaneously with Series 60

coolin Floatin

Economizer Damper Control.

Occupancy Sensor

Excel 10 W7750 Controllers provide a digital input for connection to an occupanc a passive inf rared m oti on de tec tor, that contains a dr

see following NOTE) closure to indicate whether or not people are present in the space. The Excel 10 W7750 Controller expects a contact closure to indicate the space is Occupied. See Fi

. 27 through 35 in Application Step 4,

Prepare Wiring Diagrams, for details on wiring connections. The control al

occupanc Occupanc

TOD) schedule indicates an Occupied state, and the

Da occupanc

orithm in the Excel 10 Controller uses the

sensor, if configured, to determine the Effective

see Table 5) mode of operation. If the Time Of

sensor contact is closed, the Effective Occupancy mode is Occupied. However, if the TOD schedu le indica tes an Occupied state and the occupanc

sensor. This is a device, such as

contact

sensor contact is open,

then the Effective Occupanc temperature control al

mode is STANDBY. The

orithm is then controlled to the

STA NDBY Cooling and Heating Setpoints. If the occupanc

sensor is not configured, a local controller can be put in th e STANDBY mode only by either a one-to-one association of the occupanc Controller to the local c ontroller, or b mode signal via the LONW

sensor from another Excel 10

receiving the ST ANDBY

ORKS

Bus.

NOTE: The Excel 10 Controller has limited power available

only 9 mA at 4.8 volts) for checking the digital inputs for contact closures. It is very important that the device used contains hi contacts with resistivit

uality, noncorroding

that does not degrade; that is, increase over tim e. Use nobl e metal (such as gold or silver consistent, lon

, or pimpled or sealed contacts to assure

-term operation.

The recommended devices for use with the Excel 10 W7750 Controllers are the EL7628 A1007 C eilin

Mounted Infrared or the EL7680A1008 Wall Mounted Wide View Infrared Occupanc EL761 1A1003 and the EL7612A10 01 Occupanc

Sensors. If ultrasonic sensors are required, the

Sensors are

recommended. An EL76XX Power Supply/Control Unit is

uired for use with these occupancy sensors. Th e

re EL7630A1003 can power up to four sensors, and is multitapped for several line volta power three sensors and it connects to 120 Vac line volta

es. The EL7621A1002 can

e. The EL7621A1010 can also power three sensors but it connects to 277 Vac line volta

Window Open/Closed Digital Input

A digital input is also provided for detec ting whether a window in the space was o pen ed. Th e Exc el 10 W775 0 Contro ller c an be connected to a dr

contact (see the following NOTE and

Fig. 27 through 35 in Application Step 4. Prepare Wiring

rams, for details) or a set of contacts wired in series (for

Dia monitorin

multiple win dows) to verify that the window(s) are closed. The algorithm expects a contact closure to indicate the window is closed. If an open window is detected, the

orithm changes the mode of operation to

al FREEZE_PROTECT, which shuts down the control functions, and watches for low space temperature conditions. The frost protection setpoint is 46 .4°F

8°C), and the frost alarm occurs at 42.8°F (6°C). NOTE:

This is the same NOTE as in the Occupancy Sensor

section.

The Excel 10 has limited power available

only 9 mA at 4.8 volts) for checking the digital inputs for contact closures. It is ver device used contains hi contacts with resistivit is, increase over tim e. Use nobl e metal or silver consistent, lon

, or pimpled or sealed contacts to assure

-term operation.

important that the

uality, noncorroding

that does not degrade; that

such as gold

Wall Module Options

As previously discussed, there are four basic varieties of the T7770 Wall Mod ules and two of the T7560 Di

see the Product Names and the C onstructi on section s). Also, a T7770 and T7560 Wall Modules can be shared among two or more W7750s. The control al wall module information when confi

orithm must be given this

uring the W7750 (see

Excel E-Vision User’s Guide, form 74-2588).

ital Wall Module

74-2958—126

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

(

)

(

)

(

y (

(

Dirty Filter Monitor

The air filter in the a ir han dler c an be mon itored by the W7750 and an alarm is issued when the filter media needs replacement. The two methods of monitorin

Connecting a differential pressure switch to a digital input on the W7750A or W7750B,C.

a 2 to 10V differential pressure sensor to a

Wirin voltage input on the W7750B,C. If the analog input sensor is used, its measu red valu e 0 to 5 inw

is compared to a user-selectable setpoint

kPa

FltrPressStPt—valid range: 0 to 5 inw (0 to 1.25 kPa)), and the Dirt drop across the filter exceeds the setpoint.

Filter alarm is issued when the pressure

the filter are:

0 to 1.25

Indoor Air Quality (IAQ) Override

The Excel 10 W7750 Controller provides IAQ ventilation control using one of two different methods of detecting poor

uality. The first is with an IAQ switch device connected to

air

ital input on the W7750 Controller, where a contact

a di closure indicates poor air quality, and initiates the IAQ Override mode. The device can detect poor air

desired measure such as CO2, VOC, CO, etc. The

an second method, which is only available on the W7750B,C, is

h an analog input that connects to a CO2 sensor (2 to

throu

. The measured value of C O2 from this sensor (0 to 2000

10V PPM) is compared to the setpoint (IAQSetpt). When the CO2 level is hi

her than the setpoint (800 PPM

uality using

adjustable

, the

IAQ Override is initiated. The IAQSetpt hysteresis is 50 PPM, IAQ Override is deactivated at a CO below setpoint.

The effect of initiatin economizer dampers are allowed to open above the standard minimum position settin buildin further control details.

. See Appendix B—Sequences of Operation, for

the IAQ Override mode is that the

to allow more fresh air to enter the

level less than 50 PPM

Smoke Control

The Excel 10 W7750 Controller supports smoke-related control strate command connected) smoke detect or digital input. The details of the W7750 smoke-related control ope rati on are des cri bed in Appendix B—Se

ies that are initiated either via a network

DestEmergCmd) or from a local (physically

uences of Operation.

Freeze Stat

A freeze stat can be monitored by the W7750 and issue a freeze stat alarm indicating the CVAHU is in danger of freezin control operation are de scribed i n Appendix B—Se Operation.

its coil. The details of the W7750 freeze stat related

uences of

Modes of Operation

The possible modes of operati on fo r t he W7 750 Co ntrolle r are listed in Table 5.

Table 5. Modes Of Operation For The Excel 10 W7750 Controller .

Mode Description Events causing a controller to switch to this mode Effective Occupancy (User Address: StatusOcc) OCCUPIED

STANDBY

UNOCCUPIED

BYPASS OCCUPIED

Override Modes (User Address: StatusOvrd) OCCUPIED

STANDBY

Controlle r is in Occupied mode Any of the following: Network input (DestSchedOcc) containing a

Controller is in Standb

Controller is in Unoccupied mode Network input

Controller is in Occup ied mo de t hrou

pass command

a B

Controller occupancy mode was overridden to Occupied mode

Controller occupancy mode was overridden to Standb

mode Either: (A) Network input (DestSchedOcc) containing a time-of-day

mode

time-of-da

ONWORKS

L from Network input (DestManMode) for manual override to OCC m ode. DestManMode has the hi and then DestSchedOcc.

schedule fla Bus node is STANDBY, or (B) Network input (DestSchedOcc) is OCCUPIED and the Occupanc

from the Excel 10 Zone Mana input DestManOcc has a value of UNOCCUPIED.

This mode is derived from the schedule occupanc

havin from one of three sources. Two of these are si to the unit, and received b source for an occupanc a wall module. These three sources are arbitrated in a scheme determined b Wins from OvrdPriorit

Network input (DestManOcc) containing a time-of-day schedule override si other L

Network input override si LONW

schedule flag from either the Excel 10 Zone Manager or an

Bus Controller; Time Clock DI, Occupancy Sensor DI; or

hest priority, followed by the Time Clock DI,

from the Excel 10 Zone Manager or other LONW

Sensor DI is UNOCCUPIED.

DestSchedOcc) containing a time-of-day schedule flag

a state of UNOCCUPIED and a manual request for occupancy

the configuration parameter (Network Wins or Last-in

nal of OCCUPIED from the Excel 10 Zone Manager or

ONWORKS

ORKS

Bus device.

DestManOcc) containing a time-of-day schedule

nal of STANDBY from the Excel 10 Zone Manager or other

Bus device.

er or LONW

DestManOcc and DestBypass. The third

request is from an override button located on

ORKS

Bus, or the network

nals originated external

ORKS

DestSchedOcc)

27 74-2958—1

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

(

Table 5. Modes Of Operation For The Excel 10 W7750 Controller (Continued).

Mode Description Events causing a controller to switch to this mode

UNOCCUPIED

BYPASS

Controller occupancy mode was overridden to Unoccupied mode

Controller occupanc

mode was

overridden to Bypass the current

Network input (DestManOcc) containing a time-of-day schedule override si other LONW

nal of UNOCCUPIED from the Excel 10 Zone Manager or

ORKS

Bus device.

DI (Bypass) was pressed, and the Bypass duration timer has not yet expired, or the network input DestManOcc has a value of BYPASS.

Unoccupied mode

NOT

pass action No Override input receiv ed.

No B

ASSIGNED Operational Modes (User Address : StatusM ode) START-UP

AND WAIT

COOLING

HEATING

EMERGENCY HEAT

On power-up, provides a st a

ered start sequence to evenly apply the load to the electrical s

The Excel 10 is controllin

stem.

the Cooling

mode. The Excel 10 is controllin

the Heating

mode. Compressors are disabled and onl

Auxiliar

Heat stages are allowed to

This mode occurs on con troller powe r-up, an d afte r downl oadin controller from the configuration tool. Temperature control loops are disabled.

Space temperature h as ris en abov e the c urrent coo ling setpoint, or the network input

DestHvacMode) is COOL.

Space temperature has fa llen below the curren t heating setpoint, or the network input

The network input

DestHvacMode) is HEAT.

DestManHvacMode) is EMERG_HEAT.

operate.

OFF MODE

The heat/cool control is turned off immediately. The node is not running its

Network input

DestManMode) containing AHU operational mode

information from C-Bus has value of MORNING WARM-UP.

normal temperature control.

DISABLED MODE

The heat/cool control and frost protection are turned off immediatel The node is not runnin

its normal

–

temperatur e control.

SMOKE EMERGENCY

The node has entered a smoke

ency. The fan and dampers are

emer

Network input another L

DestEmergCmd) containing smoke control signal from

ONWORKS

Bus device has value of SMOKE_EMERG. then set to the conditions configured by SmkCtlMode. The control remains in SMOKE_ EMERGENCY until power is

cled or the node receives

c DestEmer

Cmd set to

EMERG_NORMAL.

FREEZE PROTECT

MANUAL POSITION

The temperature contr ol i s set to H EAT with the setpoint set to the frost limit setpoint 46.4°F

The ph

sical outputs are being

8°C).

controlled manually. The temperature

The Window di

ital input detects an open window.

Typically this is done by the user through E-Vision or XBS by setting the point DestManMode to MANUAL mode.

control loop is turned off.

FAN ONLY

DISABLED

Control al that the fan is turned on.

Control algorithm is shut off. Network input (DestManMode) containing AHU operational mode

orithm is disabled, except

The space temperature sensor has failed, or the network input

DestHvacMode) is FAN ON LY.

information from an operator or the network that has a value of DISABLED.

to the

NOTE: During all modes all digital and analog physical

inputs are periodicall

read, the diagnostic output network variables can be polled, the input network variables are received, and the output network variables are sent periodicall

74-2958—128

(

g, (

(

(s)

g.)

)

M15120A

NOTEBOOK PC

LONWORKS BUS

PORT

EIA-232 SERIAL PORT

Q7752A SLTA

CABLE PART NO. 205979

SHIELDED INTERFACE CABLE

EXCEL 10 W7750 CVAHU CONTROLLER

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

APPLICATION STEPS

Overview

The seven application steps shown in Table 6 are planning considerations for en These steps are guidelines intended to aid understanding of the product I/O options, bus arran

uration options and the Excel 10 W7750 Co ntro lle r role

confi in the overall EXCEL 5000 OPEN SYSTEM architecture.

Step No. Description

1 Plan The S 2 Determine Other Bus Devices Re 3La 4 Prepare Wiring Diagrams 5Order E 6Confi 7 Troubleshootin

Step 1. Plan the System

Plan the use of the W7750 Controllers according to the job requirements. Determine the location, functiona lity and sensor or actuato r usa W7750 Controllers, T7770 and T7560 Wall Modules re for each model type. Also check the number and type of output actuators and o ther re

When plannin expansion possibilities to allow for future

important to be prepared for adding HVAC systems and

ver controllers in future projects.

T7560 Wall Modules can onl

ORKS

LONW as either hard-wired I/O-onl be run to them CARE/E-Vision operator terminal to have access to the

ONWORKS

L how man T7770 Wall Modules, except the T7770A1006 and the T7770A1014, can be connected via the L Also the app lication en T7770s without L bein wall modules re

uired during installation to ensure that the proper number and t buildin to the LONW terminal Wirin differences between the two types.

Bus access. T7770 Wall Modules can be in sta ll ed

Bus. The applicat ion engineer needs to dete rmine

wall modules, T7770s and T7560s ar e required. All

installed on the job, and then clearly document which

if any) have network access . This informati on is

pe of wires are pulled to the wall modules, and the

operators are informed about where they can plug in

ORKS

see Fig. 18, 19 and 20). Refer to Step 4. Prepare

Diagrams for details, about the about the wiring

ineering an Excel 10 W7750 System.

ement choices,

Table 6. Application Steps.

stem

uired

Out Communications and Power Wirin

uipment

ure Controllers

e. Verify the sales estimate of the number of

uired

uired accessories.

the system layout, consider potential

rowth. Planning is

be hard-wired, they have no

devices or additional wiring can

for the LONW

ORKS

Bus network) to allow a

ONWORKS

Bus jack.

ineer needs to know how many

ONWORKS

Bus network connections are

Bus network with a portable operator

Fig. 18. Connecting the portable operator terminal

to the LONW

The FTT communication wirin controllers is a free topo lo loop, and mixed wirin

architecture. Refer to the LONW

scheme that support s T-tap, star,

ORKS

LONW

® Bus.

ORKS

Bus) between

ORKS

Bus Wiring Guidelines form, 74-28 65 for compl ete descri ption of network topolo Communications and Power Wirin

rules. See Application Step 3. Lay Out

, for more information on bus wiring layout, and see Fig. 27 through 35 in Appl ication Step 4. Prepare Wirin

The application en Control

DDC) job requirements. This includes the Sequences

of Operation for the W7750 units, and for the s

Diagrams, for wiring details.

ineer must review the Direct Digital

stem as a whole. Usually there are variables that must be passed between the W7750 Controllers and other zone controller or central plant controller

that are required for optimum system-wide operation. Typical examples are the TOD Occ/ Unocc si control si

It is important to understand these interrelationships earl the confi

nal, the outdoor air temperature, the demand limit

nal, and the smoke control mode signal.

ob engineering process to ensure implemention when

uring the controllers. (See Application Step 6. Configure Controllers, for information on the various Excel 10 parameters and on Excel 10 point mappin

Step 2. Determine Other Bus Devices Required

A maximum of 62 nodes can communicate on a single

ONWORKS

L constitutes one nod e. If more nodes are required, a Q7751A,B Router is necessar divided between two L accounts for two o f these nodes (one node on each side of the router and two nodes are available for operator terminal nodes, leavin controllers are able to talk to each other throu Q7750A Excel 10 Zone Mana LONW

stem C-Bus. Each Excel 10 Zone Manager supports up to

S 120 Excel 10 Contr ollers. This limit is se t in the Excel 10 Zon e Mana

Bus segment. Each W7750 (CVAHU) Controller

. Using a router allows up to 125 nodes,

ONWORKS

Bus segments. The router

; a Q7750A Excel 10 Zone Manager takes one node

120 nodes available for Excel 10 Controllers. All 120

h the router. A

er is required to connect the

ORKS

Bus to the standard EXCEL 5000 OPEN

er database as an absolute maximum.

29 74-2958—1

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

gly

(

)

(

)

(

)

(

)

Each LONW

ORKS

Bus segment is set up with two unused nodes to allow for a CARE/E-Vision operator terminal to be connected to the L

One L

ONWORKS

Bus. Multiple CARE/E-Vision

Table 7. L

ONWORKS

Bus Segment Example Maximum Number of Nodes Equals 62

® Bus Configuration Rules And Device Node Numbers.

One Q7750A Excel 10 Zone Mana

Port for operator terminal access

CARE/E-Vision)1 node

Maximum number of Excel 10s 60 node s

Total62 nodes

Two L

ONWORKS

Bus Segments Example Maximum Number of Nodes Equals 125

One Q7750A Excel 10 Zone Mana

One Q7751A,B Router 2 nodes

Ports for operator terminal access (two CARE/E-Vision

terminals

Maximum number of Excel 10s in segment number one 60 nodes

Maximum number of Excel 10s in se

ment number two 60 nodes

Total

Refer to the LONW for complete description of network topolo maximum wire len

ORKS

Bus Wiring Guidelines form, 74-2865

rules and the

th limitations. If l onger runs are required, a Q7740A 2-Way or Q7740B 4-Way Repeater can be added to extend the len

th of the LONW can be added to partition the s effectively double the length of the LONW router is allowed with eac h Excel 10 Zo ne Mana network se

In addition, all L

ment can have a maximum of one repeater.

ONWORKS

installation of a 209541B Termination Module for a sin terminated LONW Modules for a doubl details on L

ORKS

ONWORKS

Bus or two 209541B Termination

terminated LONW

Bus termination, refer to th e LONW

ORKS

Bus. A Q7751A,B Router

stem into two segments and

ORKS

Bus. Only one

er, and each

Bus segments require the

ORKS

Bus. For more

ORKS

Bus Wiring Guidelines form, 7 4-28 65, or s ee Appl ic ati on Step

Out Communic ations and Power Wiring, and the

3. La

ONWORKS

Bus Termination Module subs ectio n in App licat ion

Step 4.

Step 3. Lay Out Communications and Power Wiring

LONW

The communicatio ns bus , LONW second differential Manchester encodin

ONWORKS

0.34 mm

Bus Layout

ORKS

Bus, is a 78- kil ob its p er

kbps) serial link that uses transformer isolation and

. Approved cable types for

Bus communications wiring is Level IV 22 AWG

plenum or non-plenum rated unshielded, twisted

terminals can be connected to the L same time. Table 7 summarizes the L

ONWORKS

Bus at the

Bus segment

configuration rules.

er 1 node

1 in each Bus Segment

2 nodes (1 in each Bus Segment

125

nodes

pair, so lid con duc tor wire. For nonplenum areas, use Level IV 22 AWG (0.325 mm U.S. part AK3782 rated Level IV, 22 AWG (0.325 mm AK3791

one pair) or U.S. part AK3792 (two pair). See Tables

, such as U.S. part AK3781 (one pair) or

two pair). In plenum areas, use plenum-

such as U.S. part

9 and 11 for part numbers. Contact Echelon Corp. Technical Support for the recommended vendors of Echelon approved cables. Th e FTT communications bus, L supports a polarit

insensitive, free topology wiring scheme

ONWORKS

that supports T-tap, star, loop, and mixed bus wiring.

ONWORKS

L ways, so refer to the LONW

Bus networks can be configured in a variety of

ORKS

Bus Wiring Guidelines form, 74-2865 for complete description of network topolo and Table 7. Fi

. 19 and 20 depic t t w o typical LONW

network topologies; One has only one doubly terminated

ONWORKS

L showin

Bus segment that has 60 nodes or less, and one

two singly terminated LONW

ORKS

Bus segments that

has 120 nodes or less (60 MAX per each segment). The bus

uration is set up using the Network Manager tool from

confi within CARE

see the CARE Excel 10 Zone Manager User’s

Guide, form 74-1392). NOTE: For wirin

details see the LONW

ORKS

Bus Termination Module subsection in Step 4. For wall module wirin U.S. part AK3792

ONWORKS

, U.S. part AK3782 (non-plenum) or

plenum) can be used. For a

Bus that is a doubly terminated daisychain, these cables co ntain two twisted pairs the run down to the wall module, and one for the run back up to the controller

for ease of installation.

Bus,

rules

ORKS

Bus

one for

74-2958—130

T7770

EXCEL 10 VAV

EXCEL 10 CVAHU

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

209541B TERMINATION MODULES (AT ENDS OF

ONWORKS BUS

L DAISY-CHAIN)

ONWORKS BUS

EXCEL 10 CVAHU

EXCEL 10 Q7750A ZONE MANAGER

TO C-BUS (SEE FIG. 1)

UP TO 60 TOTAL NODES

T7770

EXCEL 10 VAV

T7770

EXCEL 10 CVAHU

JACK FOR OPERATOR TERMINAL

LONWORKS BUS

EXCEL 10 VAV

T7770

ONWORKS BUS

T7770 OR T7560A,B

EXCEL 10 CVAHU

EXCEL 10 VAV

Fig. 19. Wiring layout for one doubly terminated daisy-chain LONW

EXCEL 10 CVAHU

® Bus segment.

ORKS

LONWORKS BUS I/O CONNECTIONS

T7770s WITH NO L

ONWORKS BUS

ACCESS

M17496

31 74-2958—1

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

)

ONWORKS BUS

L SEGMENT NUMBER 1

T7770

EXCEL 10 VAV

ONWORKS

L BUS ACCESS

ONWORKS BUS

L SEGMENT NUMBER 2

EXCEL 10 Q7750A ZONE MANAGER

EXCEL 10 CVAHU

EXCEL 10 VAV

TO C-BUS (SEE FIG. 1)

EXCEL 10 CVAHU

209541B TERMINATION MODULE

EXCEL 10 VAV

ONWORKS BUS

SEGMENT NUMBER 2

T7560A,B

Q7751A FTT L BUS ROUTER

Fig. 20. Wiring layout for two singly terminated

NOTE: See the L

for wirin

ONWORKS

details.

® Bus segments.

Bus Termination Module s ect ion

IMPORTANT

Notes on communications wiring:

• All field wiring must conform to local codes and ordinances or as specified on installation wiring diagrams.

• Approved cable types for L

ONWORKS

Bus communications wiring is Level IV 22 AWG (0.34 mm2) plenum or non-plenum rated unshielded, twisted pair, solid conductor wire. For nonplenum areas, use Level IV 22 AWG (0.34 mm

), such as U.S. part AK3781 (one pair) or U.S. part AK3 782 (two pai r). In plenum areas, use plenum-rated Level IV, 22 AWG (0.34 mm

) such as U.S. part AK3791 (one pair) or U.S. part AK3792 (two pair). See Tables 9 and 11 for part numbers. Contact Echelo n Corp. Technical Support for the recommended vendors of Echelon approved cables.

• Unswitched 24 Vac power wiring can be run in the same conduit as the L

ONWORKS

Bus cable.

EXCEL 10 CVAHU

209541B TERMINATION MODULE

ONWORKS

EXCEL 10 CVAHU

• Do not use different wire types or gauges on the same L

ONWORKS

Bus segment. The step change in line impedance characteristics causes unpredicta bl e reflections on the bus. When using different types is unavoidable, use a Q7751A,B Router at the junction.

• In noisy (high EMI) environments, avoid wire runs parallel to noisy power cables, or lines containing lighting dimmer switches, and keep at least 3 in. (76 mm) of separation between noisy lines and the

ONWORKS

• Make sure that neither of the L

Bus cable.

ONWORKS

Bus wires

is grounded.

Power Wiring

A power budget must be calculated for each Excel 10 W7750 Controller to determine the re proper operation. A power bud the maximum power draw ratings (in VA) of all the devices to be controlled b

an Excel 10 W7750 Controller. This includes the controller itself, the e other motors) and various contactors and transducers, as appropriate, for the Excel 10 confi

POWER BUDGET CALCULATION EXAMPLE

The follo wing is an example power budget calculation for a typical Excel 10 W7750B Controller.

Assume a W7 750 unit with a fan, two sta modulating steam valve for heating, and modulating economizer dampers. The power re

DeviceVA Information Obtained from

Excel 10 W7750B,C 12.0 W7750 Specification Data Controller

ML6161 2.2 TRADELINE Damper Actuator Catalo

R8242A 21.0 TRADELINE Contactor for fan Catalog in-rush ratin

D/X Stages 0.0 NOTE: For this example, assume the coolin

are wired into a compressor control circuit and, therefore, have no impact on the power bud

M6410A Steam 0.7 TRADELINE Heating Coil Valve Catalog, 0.32A at 24 Vac

TOTAL: 35.9 VA

The Excel 10 S

stem example requires 35.9 VA of peak power; therefore, a 40 VA AT72D Transformer is able to provide ample power for this controller and its accessories. Alternativel power two Excel 10 S

, a 75 VA AT88A Transformer could be used to

stems of this type, or a 100 VA AT92A

Transformer could be used to power two of these Excel 10

stems and meet NEC Class 2 restrictions (no greater than

S 100 VA

. See Fig. 22 and 23 for illustrations of power wiring

details. See Table 8 for VA ratin

uired transformer size for

et is simply the summing of

uipment actuators (ML6161, or

uration.

es of D/X cooling,

uirements are:



stage outputs

et.



s of various devices.

74-2958—132

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

(

)

(

)

(

gaug

)

(

Table 8. VA Ratings For Transformer Sizing.

Device Description VA

W7750A Excel 10 W7750 Controller 6.0 W7750B,C Excel 10 W7750 Controllers 12.0 ML6161A/B Damper Actuator, 35 lb-in. 2.2 R8242A Contactor 21.0 M6410A Valve Actuator 0.7 MMC325 Pneumatic Transducer 5.0 ML684 Versadrive Valve Actuator 12.0 ML6464 Damper Actuator, 66 lb-in. 3.0 ML6474 Damper Actuator, 132 lb-in. 3.0 ML6185 Damper Actuator SR 50 lb-in. 12.0 ML7984B PWM Va lv e Actua tor 6.0

For contactors and similar devices, the in-rush power ratings should be used as the worst case values when performin power bud

et calculations. Also, the application engineer

must consider the possible combinations of simultaneously

ized outputs and calculate the VA ratings accordingly.

ener The worst case, tha t uses the lar

est possible VA load, should

be determined when sizing the transformer.

LINE LOSS

Excel 10 Cont rollers must receive a minimum supply voltage of 20 Vac. If lon

power or output wire runs are required, a voltage drop due to Ohms Law (I x R) line loss must be considered. This line lo ss can result in a s i total power re

uired and thereby affect transformer sizing.

nificant increase in

The following example is an I x R line-loss calculation for a 200 ft. drawin

61m) run from the transformer to a W7750 Controller 37 VA using two 18 AWG (1.0 mm

wires.

The formula is:

Loss = [len

th of round-trip wire run (ft.)] X [resistance in

ohms per ft.)] X [current in wire (amperes)]

wire

From specification dat a:

18 AWG twisted pair wire has 6.52 ohms per 100 0 feet. Loss = [

This means that four volts are

400 ft.) X (6.52/1000 ohms per ft.)] X

[

37 VA)/(24V)] = 4.02 volts

oing to be lost between the transformer and the controller; therefore, to assure the controller receives at least 20 volts, the transformer must output more than 24 volts. Because all transformer output

e levels depend on the size of the connected load, a

volta lar

er transformer outputs a higher voltage than a small er on e

iven load. Fig. 21 shows this voltage load dependence.

for a In the prec edin

controller load is onl not sufficient due to the line loss. From Fi

I x R loss example, even though the

37 VA, a standard 40 VA transformer is

. 21, a 40 VA

transformer is just under 100 percent loaded (for the 37 VA

controller volts.

and, therefore, has a secondary voltage of 22.9

Use the lower edge of the shaded zone in Fig. 21 that represents the worst case conditions.) When the I x R loss of four volts is subtracted, onl which is not enou

h voltage for proper operation.

In this situation, the en

Use a lar

er transformer; for example, if an 80 VA

18.9 volts reaches the controller,

ineer basically has three alternatives:

model is used, see Fig. 21, an output of 24.4 volts minus the four volt line loss supplies 20.4V to the controller. Althou

h acceptable, the four-volt line-loss in

this example is higher than recommended. See the

IMPORTANT

followin

Use heavier mm which, usin onl allow a 40 VA transformer to be used. 14 AWG (2.0 mm wirin

Locate the transformer closer to the controller, thereby reducin

wire has a resistance of 2.57 ohms per 1000 ft.

the preceding formula, gives a line-loss of

1.58 volts (compared with 4.02 volts). This would

wire is the recommended wire size for 24 Vac

the length of the wire run, and the line loss.

e wire for the power run. 14 A WG (2.0

The issue of line-loss is also important in the case of the output wirin

connected to the Triac digital outputs. The same formula and method are used. The rule to remember is to keep all power and output wire runs as short as practical. When necessar wire, a bi

er transformer, or install the transformer

, use heavier gauge

closer to the controller.

IMPORTANT

No installation should be designed where the line loss is greater than two volts to allow for nominal operation if the primary voltage drops to 102 Vac (120 Vac minus 15 percent).

To meet the National Electrical Manufacturers Association

NEMA) standards, a transformer must stay within the NEMA limits. The chart in Fig. 21 shows the required limits at vari ous loads.

With 100 percent load, the transformer secondar

between 23 and 25 volts to meet the NEMA standard.

suppl

must

When a purchased transformer meets the NEMA standard DC20-1986, the transformer volta

e-regulating ability can be considered reliable. Compliance with the NEMA standard is voluntar

The follo win

Honeywell transformers meet this NEMA

standard:

Transformer Type VA Rating

AT20A 20 AT40A 40 AT72D 40 AT87A 50

AK3310 Assembl

100

33 74-2958—1

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

27 26 25 24 23 22

20 19 18

SECONDARY VOLTAGE

17 16 15 14

0 50 100 150

% OF LOAD

200

M993

Fig. 21. NEMA class 2 transformer voltage output limits.

Attach earth

round to W7750 Controller terminal 1. See Fig.

22, 23 and 24, 27 through 35.

OUTPUT DEVICE POWER

TRANSFORMER

CONNECT POWER TO TERMINALS 24 AND 25

W7750B,C

EARTH GROUND

TRIAC LINES TO ACTUATORS AND CONTACTORS

2022

Fig. 22. Power wiring details for one Excel 10 per

transformer.

See Fig. 23. for wiring more than one Excel 10 per transformer.

M10089B

120/240 VAC

IMPORTANT

If the W7750 Controller is used on

Cooling Equipment (UL 1995 U.S. only

and the transformer primary power is more than 150

volts, connect the transformer secondary to earth

ground, see Fig. 24.

TRANSFORMER

Fig. 23. Power wiring details for two or more Excel 10s per transformer.

24 VAC

EARTH GROUND

W7750B,C

EARTH GROUND

W7750B,C

EARTH GROUND

W7750B,C

M10090A

Heating and

devices

)

74-2958—134

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

g j

)

24 VAC

LINE VOLTAGE GREATER THAN 150 VAC

IF THE W7750 CONTROLLER IS USED IN UL 1995 EQUIPMENT AND THE PRIMARY POWER IS MORE THAN 150 VOLTS, GROUND 24 VAC COM SIDE OF TRANSFORMER SECONDARY.

TRANSFORMER

EARTH GROUND

Fig. 24. T ransformer power wiring details for one Excel 10

W7750

M10088A

used in UL 1995 equipment (U.S. only).

IMPORTANT

Notes on power wiring:

• All field wiring must conform to local codes and ordinances or as specified on installation wiring diagrams.

• To maintain NEC Class 2 and UL ratings, the installation must use transformers of 100 VA or less capacity.

• For multiple controllers operat ing from a si ngl e tra ns former, the same side of the transformer secondary must be connected to the same input terminal in each controller (21 on the W7750A and 24 on the W7750B,C) and the ground terminals must be connected to a verified earth ground for each controller in the group. See Fig. 23. (Controller configurations are not necessarily l im ited to th ree dev ic es pe r tra ns former.)

• For the W7750B,C Controller (which has Triac outputs), all output devices must be powered from the same transformer as the one powering the Excel 10 W7750 Controller.

• Use the heaviest gauge wire available, up to 14 AWG (2.0 mm

) for all power and earth ground connections.

) with a minimum of 18 AWG (1.0

• To minim ize EM I noi se , do no t run Triac output wires

in the same conduit as the input wires or the L

ORKS

Bus communications wiring.

• Unswitched 24 Vac power wiring can be run in the same conduit as the L

ONWORKS

• Make earth ground connections with the shortest possible wire run using 14 AWG (2.0 mm

Bus cable.

) wire. A good earth ground is essential for W7750 operation. Ideally, connect the earth ground to the ground bus at a motor control center or circuit breaker panel. However, if the nearest ideal earth ground is inaccessible, consider an alternate source for earth ground. Metal wate r pipe is genera lly a good grou nd, but do not use sprinkler pipe if prohibited by local codes. Attention must be gi ve n when duct work, conduit, or rebar are to be considered as ground sources. It is the responsibility of the installer to assure that these struc tures are tied ba ck to a kno wn earth ground.

Step 4. Prepare Wiring Diagrams

General Considerations

The purpose of this step is to assist the application engineer in developin details are included for the W7750A,B,C Controllers and the T7770 and T7560A,B Wall Modules. The drawin power, and L connections.

NOTE: For field wirin

The connector block terminals on the W7750 Controllers and on the T7770 W all M odules a ccept 14 thro u

0.34 mm T7560A,B Wall Modules accept 18 throu

0.34 mm restrictions for Excel 10 products.

ob drawings to meet job specifications. Wiring

s detail I/O,

ONWORKS

14 AWG (2.0 mm

Bus communication wiring

, when two or more wires, other than

are to be attached to the same

connector block terminal, be sure to twist them

ether. Deviation from this rule can result in

to improper electrical contact. See Fig. 25.

wire. The connector block terminals on the

wire. Table 9 lists wiring types, sizes, and length

h 22 AWG (2.0 to

h 22 AWG (1.0 to

35 74-2958—1

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

)

(

)

(

)

(

)

(

)

(

)

(

)

(

)

(

)

(

)

(

)

(

)

Table 9. Field Wiring Reference Table (Honeywell listed as AK#### or equivalent).

Wire

Function

ONWORKS

L Bus (Plenum)

Recommended

Minimum Wire

Size AWG (mm

22 AWG

0.34 mm

) Construction

Twisted pair solid conductor, nonshielded or Echelon approved

Specification

Requirement Vendor Wire Type

Level IV

60°C)

140°F ratin

cable.

ONWORKS

Bus (NonPlenum)

22 AWG

0.34 mm

Twisted pair solid conductor, nonshielded or Echelon approved

Level IV

60°C)

140°F ratin

cable.

Input Wiring Sensors Contacts

18 to 22 AWG

1.0 to 0.34 mm

Multiconductor (usually

five-wire cable bundle). For runs >200 ft. in nois

EMI areas, use

61m)

140°F ratin

60°C)

shielded cable.

Output Wiring Actuators Relays

Power Wiring

14 AWG 18 AWG acceptable for short runs

14 AWG

2.0 mm

1.0 mm

2.0 mm

Any pair nonshielded

use heavier wire for

er runs).

lon

Any pair nonshielded

use heavier wire for

longer runs).

NEC Class 2 140°F

60°C)

ratin

NEC Class 2 140°F (60°C) ratin

Maximum Length ft.

(m)

Honeywell AK3791

one twisted pair)

AK3792 (two twisted pairs

Honeywell AK3781 AK3782

one twisted pair) two twisted pairs

Refer to LONW

Guidelines for

Wirin maximum length

Refer to LONW

Guidelines for

Wirin maximum len

ORKS

Bus

Standard thermostat wire 1000 ft. (305m) for 18

AWG 200 ft. (61m) for 22 AWG

Honeywell AK3702 AK3712 AK3754

18 AWG) 16 AWG) 14 AWG

Honeywell AK3754

14 AWG) twisted

pair AK3909 (14 AWG)

le conductor

sin

Limited by line-loss effects on power consumption.

See Line

Loss subsection. Limited b

line-loss effects on power consumption.

See Line

Loss subsection.

W7750 Controller s

Fig. 27 through 35 illustrate W7750A,B,C Con trol le r wi ring for various confi terminals (2 through 6) and the communicati ons term inals (14 and 15

ONWORKS

the L the communications jack.

STRIP 1/2 IN. (13 MM) FROM WIRES TO BE ATTACHED AT ONE TERMINAL.

TWIST WIRES

TOGETHER WITH PLIERS (A MINIMUM OF THREE TURNS).

Fig. 25. Attaching two or more wires at terminal blocks.

The W7750B provides a jumper to sel ect High-Side or LowSide switchin W7750B High-Side/Low-Side selectab le sw it chi ng. (See

diagrams, Figs. 30 through 34.

wirin

urations. Connections to the wall module

are made at term inal bloc ks. Conne ction for access to

Bus is provided by plugging the connector into

1/2

(13)

3.CUT TWISTED END OF WIRES TO 3/16 IN. (5 MM)

BEFORE INSERTING INTO TERMINAL AND TIGHTENING SCREW. THEN PULL ON EACH WIRE IN ALL TERMINALS TO CHECK FOR GOOD MECHANICAL CONNECTION.

M17207

of the digital outputs. Fig. 26 shows the

JUMPER

TERMINAL 24

M16418A

Q38

J2 IS LOCATED NEAR TERMINAL 24 (COVER REMOVED).

W7750B IS FACTORY-DELIVERED WITH JUMPER ON HIGH-SIDE (PINS CLOSEST TO TERMINAL BLOCK). LOW-SIDE PINS ARE TWO PINS CLOSEST TO Q38.

Fig. 26. W7750B High-Side/ Low-Side selec table switchin g

and jumper location.

NOTE: If an Excel 10 W7750A,B,C Controller or Zone

er is not connected to a good earth ground,

Mana the controller internal transient protection circuitry is compromised and the function of pr ote cti n

the controller from noise and power line spikes cannot be fulfilled. This can result in a dama board and re

uire replacing the controller.

ed circuit

See Table 10 for a description of the W7750A terminals.

74-2958—136

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

(

)

(

)

(N)

(

)

Table 10. W7750A Version I/O Description.

Terminal Terminal Number Description

DO6–(W1)31 Heat 1 (or Reversing Valve for a Heat Pump DO5–(W2)30 Heat 2 (or Aux. Heat for a Heat Pump DO4–(Y1 DO3–(Y2 DO2–(G DO1–NET 26 Network Di DO1–NET 25 Network Di

29 Cool 1 (or Compressor 1 for a Heat Pump 28 Cool 2 (or Compressor 2 for a Heat Pump 27 Fan

ital Output

ital Output (connect to terminal number 22 +24Vac Rc 24 Control power for relay contacts DO2 (G), DO3 (Y1) and DO4 (Y2) Rh 23 Control power for rela

contacts DO5 (W1) and DO6 (W2 +24Vac (H)22 Power for the controller COM E-Bus 14 and 15 Echelon communications DI - 2 12 Di DGND 11 Di DGND 10 Di

21 Return for power to controller

LONW ital Input 2 ital Ground ital Ground

ORKS

Bus) screw terminals

DI - 1 9 Digital Input 1 AGND 8 Analog ground AI - 1 OHM 7 Analo

Input 1 (used for Discharge Air Temperature Sensor SET PT 6 Space temperature setpoint potentiometer GROUND 5 Wall Module SENSOR 4 Space temperature sensor BYPASS 3 Space override button LED 2 Space LED for indication of manual occupanc

status

EARTH GND 1 Earth Ground

IMPORTANT

If the W7750A controller is configured by E-Vision, the outputs may be assigned in different order than the factory defaults. Use the Custom Wiring function of E-Vision to re-assign the outputs to the desired terminals.

The W7750B,C Versions are preconfigured with the same

default setup as the W7750A Model; however, some

factor terminals for wiring connections differ on the W77 50B,C Models. See F i Model and Fi Model. The factor points on the W7750B,C Model s foll ow from the W7750A

. 30 for the terminal names on the W7750B

. 35 for the terminal names on the W7750C

default configuration of the digital output

terminal names are

FACTORY DEFAULT DIGITAL OUTPUTS:

FREE 1

OUT 1) DO1—NETWORK DO OUT 2) DO2—SUPPLY FAN START/STOP OUT 3) DO3—COOL_STAGE_2 OUT 4) DO4—COOL_STAGE_1

OUT 5) DO5—HEAT_STAGE_2

OUT 6) DO6—HEAT_STAGE_1 DO7—UNUSED DO8—UNUSED

The Wall Module terminals are identical for the W7750A,B,C Models.

The W7750B,C Models offers two volta

e/current sensor

input terminals. When current-type sensors (4 to 20 mA) are

ured, the W7750B,C automatically switches a 249 ohm

confi resistor into the sensin re

uired. The W7750A Model does not support voltage or

circuit; so no external resistor is current inputs. NOTE: If usin

factory defaults, DI-2 input is configured for

ScheduleMaster

nvoIO.SchedMaster). For a stand-alone unit, either connect an external time clock to terminals 9 and 10 or put a terminals 9 and 10

using a jumper puts the

controller in continuous occupied mode

umper on

37 74-2958—1

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

HEAT 2HEAT 1

31 30 29 28 27 26 25 24 23 22 21 20

W1W2Y1

FAN

COMP2COMP 1

NETWORK

24 VAC

24 VAC COM

W7750A CONSTANT VOLUME AHU CONTROLLER

WALL MODULE

LED

BYPASS

EARTH

GROUND

12345678

7 654321

9 8

LED

SET PT

BYPASS

SENSOR

GND

SET PT

GROUND

E-BUS

AI-1 OHM

DISCHARGE AIR TEMP

GROUNDDIGROUND

GROUND

DI- 1

9 101112 14 J315

TIME CLOCK

JACK FOR

ONWORKS-BUS

L NETWORK ACCESS

LOAD AND CONTROLLER

POWER

24 VAC

19 18 17 16

NOT USED

ONWORKS

NOT USED

DI- 2

HEAT 2HEAT 1

COMP2COMP 1

FAN

LOAD POWER

24 VAC LINE AC

CONTROLLER POWER

24 VAC

BUS

LON

JACK

LONWORKS-BUS

31 30 29 28 27 26 25 24 23 22 21 20

W1W2Y1

NETWORK

24 VAC

W7750A CONSTANT VOLUME AHU CONTROLLER

WALL MODULE

LED

BYPASS

EARTH

GROUND

12345678

SENSOR

GROUND

SET PT

AI-1 OHM

DISCHARGE AIR TEMP

GROUNDDIGROUND

GROUND

DI- 1

9101112 14 J315

19 18 17 16

24 VAC COM

DI- 2

TIME CLOCK

NOT USED

ORKS

NOT USED

BUS

LONJACK

-BUS

ORKS

GND

E-BUS

JACK FOR

ONWORKS

L NETWORK ACCESS

-BUS

), FOR EARTH GROUND WIRE.

T7770C WALL MODULE

EARTH GROUND WIRE LENGTH SHOULD BE HELD TO A MINIMUM. USE THE HEAVIEST GAUGE WIRE AVAILABLE, UP TO 14 AWG (2.O MM WITH A MINIMUM OF 18 AWG (1.O MM

TO ASSURE PROPER ELECTRICAL CONTACT, WIRES MUST BE TWISTED TOGETHER BEFORE INSERTION INTO THE TERMINAL BLOCK.

LOAD POWER WIRE CAN BE CONNECTED TO TERMINAL 22.

Fig. 27. Typical W7750A Controller AHU application

wiring diagram. (For more information on note 2,

refer to Fig. 25.)

), FOR EARTH GROUND WIRE.

M10085C

7 69 8 54321

LED

SET PT

BYPASS

SENSOR

)

T7770C WALL MODULE

EARTH GROUND WIRE LENGTH SHOULD BE HELD TO A MINIMUM. USE THE HEAVIEST GAUGE WIRE AVAILABLE, UP TO 14 AWG (2.O MM WITH A MINIMUM OF 18 AWG (1.O MM

TO ASSURE PROPER ELECTRICAL CONTACT, WIRES MUST BE TWISTED TOGETHER BEFORE INSERTION INTO THE TERMINAL BLOCK.

Fig. 28. Typical W7750A Controller with separate

transformer application wiring diagram.

(For more information on note 2, refer to Fig. 25.)

74-2958—138

M10084C

)

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

ML6161 FLOATING ACTUATOR

CW COM CCW

HEAT 1

31 30 29 28 27 26 25 24 23 22 21 20

W1W2Y1

NETWORK

24 VAC

W7750A CONSTANT VOLUME AHU CONTROLLER

19 18 17 16

NOT USED

24 VAC COM

LOAD AND CONTROLLER POWER

24 VAC

NOTE: Di

locations for each function are user-selectable. The Network DO is confi close in this fi economizer float open. Ph features are done in E-Vision by the custom wiring function.

ital outputs are configurable. The terminal

ured to be economizer float

ure and W2 is configured to be

sical outpu t terminal

WALL MODULE

LED

BYPASS

EARTH

GROUND

12345678

7 69 8 54321

LED

SET PT

BYPASS

SENSOR

GND

SET PT

GROUND

E-BUS

AI-1 OHM

DISCHARGE AIR TEMP

GROUNDDIGROUND

GROUND

DI- 1

9 101112 14 J315

TIME CLOCK

JACK FOR

ONWORKS-BUS

L NETWORK ACCESS

DI- 2

NOT USED

ONWORKS

T7770C WALL MODULE

EARTH GROUND WIRE LENGTH SHOULD BE HELD TO A MINIMUM. USE THE HEAVIEST GAUGE WIRE AVAILABLE, UP TO 14 AWG (2.O MM WITH A MINIMUM OF 18 AWG (1.O MM

TO ASSURE PROPER ELECTRICAL CONTACT, WIRES MUST BE TWISTED TOGETHER BEFORE INSERTION INTO THE TERMINAL BLOCK.

LOAD POWER WIRE CAN BE CONNECTED TO TERMINAL 22.

), FOR EARTH GROUND WIRE.

BUS

LON

JACK

LONWORKS-BUS

M10083C

)

Fig. 29. W7750A Controller floating economizer damper

wiring diagram. (For more information on note 2, refer to

Fig. 25.)

39 74-2958—1

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

COOL

STAGE 2

STAGE 1FAN

OUT 1

OUT 3

24 VAC

OUT 2

24 VAC COM

TRIAC EQUIVALENT CIRCUIT

DI-2

COOL STAGE 3

DI-1

GROUND

COOL STAGE 4

31 30 29 28 27 26 25 24 23 22 21 20

DI-4

DI-3

GROUND

W7750B CONSTANT VOLUME AHU CONTROLLER

WALL MODULE

HEAT STAGE 2

19 18 17 16

OUT 6

OUT 5

OUT 4

HEAT STAGE 1

24 VAC

OUT 7

OUT 8

TWO - OR THREE-WAY CHILLER WATER VALVE

SERIES 60 VALVE ACTUATOR

COM

STEM DOWN

STEM UP

TWO - OR THREE-WAY HOT WATER/STEAM VALVE

SERIES 60 VALVE ACTUATOR

COM

STEM DOWN

STEM UP

ECONOMIZER DAMPER

SERIES 60 ACTUATOR

CW COM CCW

24 VAC

31 30 29 28 27 26 25 24 23 22 21 20

DI-4

DI-2

DI-3

GROUNDDIGROUND

DI-1

OUT 1

24 VAC

OUT 2

24 VAC COM

TRIAC EQUIVALENT CIRCUIT

W7750B CONSTANT VOLUME AHU CONTROLLER

OUT 3

OUT 4

19 18 17 16

OUT 7

OUT 6

OUT 5

OUT 8

LED

BYPASS

EARTH

GROUND

12345678

7 69 8 54321

LED

SET PT

BYPASS

SENSOR

GND

SET PT

GROUND

E-BUS

AI-1 OHM

GROUND

JACK FOR L NETWORK ACCESS

AI-2 OHM

9 101112 14 J315

ONWORKS-BUS

GROUND

AI-3 V/mA

AI-4 V/mA

20 VDC OUT

ONWORKS

BUS

LON

JACK

LONWORKS-BUS

T7770C WALL MODULE

EARTH GROUND WIRE LENGTH SHOULD BE HELD TO A MINIMUM. USE THE HEAVIEST GAUGE WIRE AVAILABLE, UP TO 14 AWG (2.O MM WITH A MINIMUM OF 18 AWG (1.O MM

TO ASSURE PROPER ELECTRICAL CONTACT, WIRES MUST BE TWISTED TOGETHER BEFORE INSERTION INTO THE TERMINAL BLOCK.

WIRING DIAGRAM SHOWS JUMPER (FOR J2) IN FACTORY DEFAULT

HIGH-SIDE POSITION. ISOLATING RELAYS MUST BE USED WHEN CONNECTING TO STAGED

HEAT/COOL EQUIPMENT.

), FOR EARTH GROUND WIRE.

Fig. 30. Typical W7750B Controller with staged heating

and cooling wiring diagram. (For more information on

note 2, refer to Fig. 25.)

M10082D

)

WALL MODULE

LED

BYPASS

EARTH

GROUND

12345678

7 69 8 54321

LED

SET PT

BYPASS

SENSOR

GND

SET PT

GROUND

E-BUS

AI-1 OHM

DISCHARGE AIR TEMP

GROUND

JACK FOR L NETWORK ACCESS

GROUND

AI-3 V/mA

AI-2 OHM

9 101112 14 J315

ONWORKS-BUS

AI-4 V/mA

20 VDC OUT

ONWORKS

BUS

LON

JACK

LONWORKS-BUS

T7770C WALL MODULE

EARTH GROUND WIRE LENGTH SHOULD BE HELD TO A MINIMUM. USE THE HEAVIEST GAUGE WIRE AVAILABLE, UP TO 14 AWG (2.O MM WITH A MINIMUM OF 18 AWG (1.O MM

TO ASSURE PROPER ELECTRICAL CONTACT, WIRES MUST BE TWISTED TOGETHER BEFORE INSERTION INTO THE TERMINAL BLOCK.

WIRING DIAGRAM SHOWS JUMPER (FOR J2) IN FACTORY DEFAULT HIGH-SIDE POSITION.

), FOR EARTH GROUND WIRE.

Fig. 31. W7750B Controller with floating heating, cooling

and economizer wiring diagram. (For more information on

note 2, refer to Fig. 25.)

M10081C

)

74-2958—140

ECONOMIZER

12345678

24 VAC

W7750B CONSTANT VOLUME AHU CONTROLLER

EARTH GROUND WIRE LENGTH SHOULD BE HELD TO A MINIMUM. USE THE HEAVIEST GAUGE WIRE AVAILABLE, UP TO 14 AWG (2.O MM

)

WITH A MINIMUM OF 18 AWG (1.O MM

), FOR EARTH GROUND WIRE.

TO ASSURE PROPER ELECTRICAL CONTACT, WIRES MUST BE TWISTED TOGETHER BEFORE INSERTION INTO THE TERMINAL BLOCK.

WIRING DIAGRAM SHOWS JUMPER (FOR J2) IN FACTORY DEFAULT HIGH-SIDE POSITION.

LONWORKS-BUS

EARTH

GROUND

JACK FOR L

ONWORKS-BUS

NETWORK ACCESS

7 69 8 54321

T7770C WALL MODULE

SET PT

GND

SENSOR

BYPASS

LED

E-BUS

9 101112 14 J315

31 30 29 28 27 26 25 24 23 22 21 20

24 VAC COM

WALL MODULE

SET PT

SENSOR

BYPASS

LED

20 VDC OUT

19 18 17 16

AI-1 OHM

AI-2 OHM

AI-4 V/mA

OUT 7

OUT 6

OUT 5

OUT 4

OUT 8

OUT 1

OUT 3

OUT 2

AI-3 V/mA

DI-2

DI-4

DI-1

DI-3

OCCUPANCY SENSOR (CONTACTS CLOSED EQUALS OCCUPIED)

WINDOWS CONTACTS (CONTACTS CLOSED EQUALS WINDOW CLOSED)

M10079C

TRIAC EQUIVALENT CIRCUIT

DISCHARGE AIR TEMP

OUTDOOR ENTHALPY RETURN

ENTHALPY

GROUNDDIGROUND

GROUND

LON

JACK

ONWORKS

BUS

DAMPER

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

31 30 29 28 27 26 25 24 23 22 21 20

GROUND

DI-3

DI-2

GROUND

DI-4

W7750B CONSTANT VOLUME AHU CONTROLLER

EARTH

12345678

WALL MODULE

LED

GROUND

SENSOR

GROUND

BYPASS

T7770C

7 69 8 54321

LED

BYPASS

SET PT

SENSOR

GND

E-BUS

WALL MODULE

PWM ACTUATOR

POWER

24V COM 24V

DI-1

24 VAC

SET PT

GROUND

AI-1 OHM

E-BUS

SIG

OUT 3

OUT 4

19 18 17 16

OUT 5

SIGNAL

OUT 1

OUT 2

24 VAC COM

TRIAC EQUIVALENT CIRCUIT

GROUND

AI-2 OHM

AI-3 V/mA

AI-4 V/mA

9 101112 14 J315

DISCHARGE AIR TEMP

JACK FOR

ONWORKS-BUS

L NETWORK ACCESS

20 VDC OUT

24 VAC

OUT 7

OUT 6

OUT 8

LONJACK

LONWORKS

BUS

ONWORKS-BUS

EARTH GROUND WIRE LENGTH SHOULD BE HELD TO A MINIMUM. USE THE HEAVIEST GAUGE WIRE AVAILABLE, UP TO 14 AWG (2.O MM WITH A MINIMUM OF 18 AWG (1.O MM

TO ASSURE PROPER ELECTRICAL CONTACT, WIRES MUST BE TWISTED TOGETHER BEFORE INSERTION INTO THE TERMINAL BLOCK.

WIRING DIAGRAM SHOWS JUMPER (FOR J2) IN FACTORY DEFAULT HIGH-SIDE POSITION.

FOR WIRING DETAILS FOR PWM DEVICES, REFER TO DOCUMENTATION INCLUDED WITH PWM DEVICES.

Fig. 32. W7750B,C Controller PWM damper actuator

wiring diagram. (For more information on note 2, refer to

Fig. 25.)

), FOR EARTH GROUND WIRE.

)

M10080C

Fig. 33. W7750B,C wiring diagram with 4 to 20 mA

enthalpy sensors and digital inputs. (For more

information on note 2, refer to Fig. 25.)

41 74-2958—1

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

OWS CO

WIND (CONTACTS CLOSED EQUALS WINDOW CLOSED)

31 30 29 28 27 26 25 24 23 22 21 20

DI-4

NTACT

OCCUPANCY SENSOR (CONTACTS CLOSED EQUALS OCCUPIED)

DI-2

DI-3

GROUND

DI-1

24 VAC

W7750B CONSTANT VOLUME AHU CONTROLLER

WALL MODULE

LED

BYPASS

EARTH

GROUND

12345678

SENSOR

GROUND

SET PT

AI-1 OHM

HUMIDITY (4 TO 20 MA)

C7600C

19 18 17 16

OUT 1

OUT 3

OUT 2

OUT 4

24 VAC COM

TRIAC EQUIVALENT CIRCUIT

GROUND

9 101112 14 J315

AI-2 OHM

AI-3 V/mA

GROUND

AI-4 V/mA

–

24 VAC

OUT 6

OUT 5

LONWORKS

BUS

20 VDC OUT

OUT 7

OUT 8

JACK

ONWORKS-BUS

INPUT

DI-1

TWO - OR THREE-WAY HOT WATER/ STEAM VALVE

SERIES 70 VALVE ACTUATOR

COM

Vac

OUT 1

24 VAC

24 VAC COM

TRIAC EQUIVALENT

INPUT

OUT 2

CIRCUIT

OUT 3

TWO - OR THREE-WAY CHILLER WATER VALVE

FAN

SERIES 70 VALVE ACTUATOR

COM

Vac

31 30 29 28 27 26 25 24 23 22 21 20

DI-4

DI-2

DI-3

GROUNDDIGROUND

W7750C CONSTANT VOLUME AHU CONTROLLER

WALL MODULE

LED

BYPASS

EARTH

GROUND

12345678

SENSOR

GROUND

SET PT

GROUND

AI-1 OHM

GROUND

AI-3 V/mA

AI-2 OHM

9 101112 14 J315

DISCHARGE AIR TEMP

ECONOMIZER DAMPER

ML7161

4-20

2-10

19 18 17 16

AO 1

OUT 5

OUT 4

ONWORKS

AI-4 V/mA

20 VDC OUT

COM

BUS

AO 2

3 24

Vac T1

24 Vac

AO 3

LON

JACK

7 69 8 54321

LED

SET PT

BYPASS

GND

SENSOR

E-BUS

JACK FOR

ONWORKS-BUS

L NETWORK ACCESS

7 69 8 54321

LED

SET PT

BYPASS

SENSOR

GND

E-BUS

JACK FOR

ONWORKS-BUS

L NETWORK ACCESS

T7770C

T7770C WALL

WALL MODULE

MODULE

EARTH GROUND WIRE LENGTH SHOULD BE HELD TO A MINIMUM.

EARTH GROUND WIRE LENGTH SHOULD BE HELD TO A MINIMUM. USE THE HEAVIEST GAUGE WIRE AVAILABLE, UP TO 14 AWG (2.O MM WITH A MINIMUM OF 18 AWG (1.O MM

TO ASSURE PROPER ELECTRICAL CONTACT, WIRES MUST BE TWISTED TOGETHER BEFORE INSERTION INTO THE TERMINAL BLOCK.

WIRING DIAGRAM SHOWS JUMPER (FOR J2) IN FACTORY DEFAULT HIGH-SIDE POSITION.

), FOR EARTH GROUND WIRE.

M11619B

)

Fig. 34. W7750B,C wiri ng diagram with C7600C 4 to 20 mA

solid state humidity sensor. (For more information on

note 2, refer to Fig. 25.)

74-2958—142

USE THE HEAVIEST GAUGE WIRE AVAILABLE, UP TO 14 AWG (2.O MM WITH A MINIMUM OF 18 AWG (1.O MM

TO ASSURE PROPER ELECTRICAL CONTACT, WIRES MUST BE TWISTED TOGETHER BEFORE INSERTION INTO THE TERMINAL BLOCK.

IF AN ANALOG OUTPUT DEVICE HAS A SIGNAL COM (-) TERMINAL,

CONNECT IT TO THE 24 VAC COM TERMINAL NUMBER 24.

), FOR EARTH GROUND WIRE.

Fig. 35. W7750C Controller with 4-to-20 mA heating,

cooling and economizer wiring diagram. AOs must use

terminals 16, 17 or 18. The AOs can be set to be reverse

acting. (For more information on note 2, refer to Fig. 25.)

See Fi

. 36 or 37 to wire a pneumatic transducer to a

W7750B or W7750C.

LONWORKS-BUS

)

M16417B

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

(

)

gly

(

24 VAC

W7750C CONSTANT VOLUME AHU CONTROLLER

RP7517B PNEUMATIC TRANSDUCER

ANALOG OUTPUTS FROM W7750C ARE 4 TO 20 mA SIGNALS. A 500 OHM 1% TOLERANCE (OR BETTER) PRECISION RESISTOR IS REQUIRED TO DRIVE THIS (RP7517B) AND OTHER 2 TO 10V DEVICES. PLACE THIS RESISTOR AS CLOSE AS POSSIBLE TO THE DRIVEN DEVICE.

USE 1/4 IN (6 MM) PNEUMATIC TUBING. MINIMUM BRANCH LINE MUST BE 6 FT. (1.8M) OR LONGER.

TERMINALS 16 TO 18 ARE ANALOG OUTPUTS (W7750C ONLY).

31 30 29 28 27 26 25 24 23 22 21 20

24 VAC COM

19 18 17 16

AO 2

AO 1

BLACK

BLUE

BROWN

OUT 5

OUT 4

AO 3

OUT 1

OUT 3

OUT 2

DI-2

DI-4

DI-1

DI-3

PNEUMATIC VALVE ACTUATOR

500

M17368

RP7517B

GROUNDDIGROUND

MMC325 PNEUMATIC TRANSDUCER

24 (H)

24 (N)

24 (H)

31 30 29 28 27 26 25 24 23 22 21 20

DI-4

DI-2

DI-3

GROUNDDIGROUND

DI-1

W7750B,C CONSTANT VOLUME AHU CONTROLLER

MAKE SURE ALL TRANSFORMER/POWER WIRING IS AS SHOWN; REVERSING TERMINATIONS RESULTS IN EQUIPMENT MALFUNCTION.

OPTIONAL 24 VAC WIRING TO NEXT CONTROLLER. USE 1/4 IN (6 MM) PNEUMATIC TUBING. MINIMUM BRANCH LINE

MUST BE 6 FT. (1.8M) OR LONGER.

TERMINALS 16,17, 18 ARE ANALOG OUTPUTS (W7750C ONLY).

Fig. 36. Pneumatic transducer to W7750B,C

To use the analo actuators or transducers, a 500 ohm tolerance

resistor must be placed across the 2-to-10V devices input and ground terminal. See Fig. 37. for an example. The resist or conve rts a 4 to 20 mA si 10V si

NOTE: Wire the 500 ohm resistor ph

nal.

possible to the d riven dev ice. If th e resisto r is loca ted far awa

(B shown, see triangle note 4).

outputs on the W7750C with 2-to-10V

from the driven device, it is possible that

noise will be added onto the 2-to-10V si

round line. This noi se co uld ca use an actua tor to re -

position (jitter) and reduce the actuators life.

24 (N)

24 VAC

24 VAC COM

INCREASE

OUT 1

DECREASE

PNEUMATIC VALVE

19 18 17 16

OUT 3

OUT 2

OUT 4

OUT 5

1 percent or better

nal into a 2-to-

sically as close as

OUT 7

OUT 6

M10078C

nal to

24 VAC

OUT 8

Fig. 37. RP7517,B pneumatic transducer to W7750C.

LONW

ORKS

Bus Termination Module

One 209541B Excel 10 FTT Termination Module is required for a sin

terminated LONW 209541B Excel 10 FTT Termination Modules are re a doubly terminated daisy-chain LONW

see Fig. 38). Refer to LONW

ORKS

Bus segment. Two

ORKS

Bus Wiring Guidelines

Bus segment

uired for

form, 74-2865 for ter m ination mo dule placement rules. For 209541B Excel 10 FTT Termination module placement

and wirin

options, see Fig. 39.

43 74-2958—1

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

W7750B, C

BROWN

1415 1415

ORANGE

PART NO. 209541B TERMINATION MODULE

W7750B, C

Fig. 38. Typical doubly terminated daisy-chain LONW

W7750B, C

1415

PART NO. 209541B TERMINATION MODULE

® Bus segment termination module wiring diagram.

ORKS

BROWN

ORANGE

M10519A

74-2958—144

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

SINGLY TERMINATED SEGMENT

INTERNAL

TERMINATION

NETWORK

INTERNAL

TERMINATION

NETWORK

3 4

ONWORKS BUS

LONWORKS BUS

6 7 8

TERMINAL BLOCK FOR Q7750A ZONE MANAGER

FIELD INSTALLED JUMPER

USE FOR DOUBLY TERMINATED DAISY-CHAIN SEGMENT

FIELD INSTALLED JUMPER

(A) Enabling Internal Termination Network using

jumpers in the Q7750A Zone Manager

LONWORKS BUS

PART NO. 209541B TERMINATION MODULE

INSERT INTO TERMINALS 1 AND 2 WITH THE

LONWORKS BUS WIRE. TERMINATION MODULE IS

PHYSICALLY LOCATED BEHIND THE T7770 INSIDE THE 2 X 4 OR 60 MM BOX.

ONWORKS Bus Termination Module installed

at 2 x 4 or 60 mm box-mounted T7770

PART NO. 209541B TERMINATION MODULE

(B) Installing L Termination Module at W7750

SEGMENTS

O I II O I II

LABEL ON Q7740B 4 WAY REPEATER

Q7740B 4 WAY REPEATER SHOWN,

NOTE:

Q7740A 2 WAY REPEATER HAS TWO SWITCHES.

(D) LONWORKS Bus Termination network

switches in the Q7740A, B Repeaters

W7750

LONWORKS BUS

ONWORKS Bus

SWITCHES ON SIDE, UNDER Q7740A,B CIRCUIT BOARD. USE SMALL FLAT OBJECT TO MOVE THE SWITCHES AS NEEDED FROM POSITION O (NO TERMINATION) POSITION I (SINGLY TERMINATED) POSITION II (DOUBLY TERMINATED)

PART NO. 209541B TERMINATION MODULE

(E) Installing L

ONWORKS Bus Termination

ONWORKS BUS

Module at W7751H (terminals 11 and 12)

Fig. 39. LONW

® Bus termination wiring options.

ORKS

Step 5. Order Equipment

After compiling a bill of materials through completion of the previous application steps, refer to Table 11 for orderin information. Contact Honeywell for information about Controllers and Wall Modules with no lo Excel 10 W7750 Controller Orderin

o. See Table 11.

Information.

RJ-45 PLUG

Q7751A LONWORKS BUS ROUTER

NET 2

PART NO. 209541B TERMINATION MODULE

(F) Twist wires and attach wire nuts to RJ-45 Adapter

cables, L

ONWORKS Bus segment wires and Termination

Module to connect to a Q7751A,B Router

LONWORKS BUS

WIRE NUTS

M11618A

45 74-2958—1

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

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)

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(

Table 11. Excel 10 W7750 Controller Ordering Information.

Part Number Product Description Comments

Excel 10 W7750 Controllers:

W7750A2005 Constant Volume AHU Controller

W7750A

W7750B2011 Constant Volume AHU Controller (W7750B

W7750C2001 Constant Volume AHU Controller

W7750C)Six Analog Inputs, Five Digital Inputs, Five Triac

T7770 and T7560 Wall Modules:

T7770A1006 Sensor with Hone T7770A1014 Sensor with No Lo T7770A2004 Sensor, L

ONWORKS

T7770A2012 Sensor with L T7770B1004 Sensor with Setpoint and L

well Logo

Hone

T7770B1046 Sensor with Setpoint and L

well Logo

Hone

T7770B1012 Sensor with Setpoint and LONW

T7770B1020 Sensor with Setpoint and L

well Logo

Hone

T7770B1053 Sensor with Setpoint and L

T7770B1038 Sensor with Setpoint and LONW

T7770C1002 Sensor with Setpoint, B

ONWORKS

Jack, Honeywell Logo

T7770C1044 Sensor with Setpoint, B

ONWORKS

Jack, Honeywell Logo

well Logo Used with Excel 5000 and Excel 10 Controllers

o Used with Excel 5000 and Excel 10 Controllers

Jack and Honeywell Logo Used with Excel 5000 and Excel 10 Controllers

ONWORKS

Jack and No Logo Used with Excel 5000 and Excel 10 Controllers

ONWORKS

ORKS

Jack,

Jack, No

Jack,

Jack, No

pass/LED and

T7770C1010 Sensor with Setpoint, Bypass/LED and

ONWORKS

T7770C1028 Sensor with Setpoint, B

ONWORKS

T7770C1051 Sensor with Setpoint, B

ONWORKS

T7770C1036 Sensor with Setpoint, B

ONWORKS

T7770D1000 Sensor with B

Hone

T7770D1018 Sensor with B

No Lo

T7560A1018 Di

ital Wall Modu le with Sens or, Setpoint and

pass/LCD, Honeywell Logo

Jack, No Logo

Jack, Honeywell Logo

Jack, No Logo

pass/LED and LONW

well Logo

pass/LED and LONW

pass/LED and

ORKS

Jack,

T7560A1016 Digital Wall Modu le with Sens or, Setpoint,

pass/LCD and Humidity, Honeywell Logo

Sensors:

C7770A1006 Air Temperature Sensor. 20 Kohm NTC

nonlinearized

C7031J1050 Averaging Discharge/Return Air Temperature

Sensor. 20 Kohm NTC

C7031B1033 Dischar

e Air or Hot Water Temperature

Sensor. 20 Kohm NTC

Three Analog Inputs, Three Digital Inputs and Six 24 Vac Rela

Outputs

Six Analog Inputs, Five Digital Inputs and Eight

h-side Low-side switchable)Triac Outputs

Outputs and Three Ana lo

rees F Absolute

Outputs

Relative Setpoint

rees F Absolute

rees C Absolute

Relative Setpoint

rees C Absolute

rees F Absolute

Relative Setpoint

rees F Absolute

rees C Absolute

Relative Setpoint

rees C Absolute

rees F Absolute

rees C Absolute

Duct-mou nted sensor that functions as a

and/or secondary sensor.

primar Duct element cord length 12 ft. (3.7m).

Use 11 26 22AA Imm ers io n W el l.

74-2958—146

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

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(

Table 11. Excel 10 W7750 Controller Ordering Information. (Continued)

Part Number Product Description Comments

C7031C1031 Duct Discharge/Return Air Sensor. 20 Kohm 18 in. (457mm) insertion length. C7031D1062 Hot or chilled Water Temperature Sensor. 20

—

Kohm NTC

C7031F1018 Outside Air Temperature Sensor. 20 Kohm

W7750B,C onl

NTC

C7031K1017 Hot or chilled Water Temperature Sensor. 20

Strap-on

Kohm NTC

C7100A1015 Avera

Discharge/Return A i r Temperature

13 in. (330mm) insertion length.

Sensor. PT3000

C7170A1002 Outdoor Air Temperature Sensor. PT3000 —

Echelon Based Components and Parts:

Q7750A2003 Excel 10 Zone Mana

er Free Topology Tranceiver (FTT Q7751A2002 Router (FTT Q7751B2000 Router Twisted Pair Tranceiver (78 kbps) to FTT Q7752A2001 Serial Interface (FTT Q7752A2009 Serial Interface (PCMCIA card Q7740A1008 Excel 10 2-Way Repeater Used to extend the length of the LONW

(FTT

ORKS

Bus. Contains built in termination modules.

Q7740B1006 Excel 10 4-Wa

Repeater Used to extend the length of the LONW

ORKS

Bus. Contains built in termination modules. XD 505A Standard C-Bus Communications Submodule — XD 508 C-Bus Communications Submodul e

1 megabit

—

baud rate 209541B Termination Module One/two re 205979 Operator Terminal Cable for LONW

ORKS

Bus Serial interface to wall module or controller

uired per LONW

ORKS

Bus segment

Accessories (Sensors):

EL7680A1008 Wall Mounted Wide View Infrared Occupanc

—

Sensor EL7628A1007 Ceilin

Mounted Infrared Occupancy Sensor — EL7611A1003, EL7612A1001 Ultrasonic Occupancy Sensors — EL7630A1003,

EL7621A1002,

Power Suppl sensors

/Control Units for Occupancy

—

EL7621A1010 C7242A1006 CO

C7400A1004 Solid State Enthalp C7600B1000 Solid State Humidity Sensor (2 to 10 V C7600C1008 Solid State Humidity Sensor (4 to 20 mA C7600C1018 Solid State Humidity Sensor (2 to 10 V

Sensor/Monitor Use to measure the levels of carbon dioxide

Sensor (4 to 20 mA

For outdoor and return air enthalp For outdoor and return air humidit For outdoor and return air humidit For outdoor and return air humidit

Accessories:

MMC325-010, MMC325-020 Pneumatic Retrofit Transducers. Select

pressure ran

e: (010) 0 to 10 psi (68.97 kPa) or

Use to control Pneumatic reheat valves.

020) 0 to 20 psi (137.93 kPa). MMCA530 DIN rail adapter for MMC325 Transducers — MMCA540 Metal enclosure for MMC325 Transducers — ML7984B3000 Valve Actuator Pulse Width Modulation

PWM)Use with V5011 or V5013 F and G Valves ML6161B1000 Damper Actua tor Serie s 60 — M6410A Valve Actuator Series 60 Use with V5852/V5853/V5862/V5863 Valves ML684A1025 Versadrive Valve Actuator with linka

e, Series 60Use with V5011 and V5013 Valves

47 74-2958—1

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

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Table 11. Excel 10 W7750 Controller Ordering Information. (Continued)

Part Number Product Description Comments

ML6464A1009 Direct Coupled Actuator, 66 lb-in. tor

ue,

Series 60

ML6474A1008 Direct Coupled Actuator, 132 lb-in. tor

ue,

Series 60 ML6185A1000 Direct Coupled Actuator, 50 lb-in. sprin V5852A/V5862A Two-wa

0.47, 0.74, 1.2, and 1.9 C

or 2.9 and 4.9 C

terminal unit water valve; 0.19, 0.29,

1/2 in. npt (13 mm)

3/4 in. npt (19 mm

return Series 60

Use with M6410 Valve Actuator. Close-off rating for 0.19 to 1.9 C

45 psi.

= gallons per minute divided by the square

is 65 psi; for 2.9 and 4.9, Cv is

Coefficient of volume or capacity index

root of the pressure drop across the valve.

V5853A/V5863A Three-way mixing terminal unit hot water v alve;

0.19, 0.29, 0.47, 0.74, 1.2, and 1.9 C 13 mm) or 2.9 and 4.9 Cv 3/4 in. npt (19

npt

1/2 in.

Use with M6410 Valve Actuator. Close-off rating for 0.19 to 0.74 C

psi; 2.9 and 4.9 C

is 55 psi; 1.2 and 1.9 Cv is 22

is 26 psi.

mm R8242A Contactor, 24 Vac coil, DPDT — AT72D, AT88A, AK3310, etc. Transformers — EN 50 022 DIN rail 35 m m b

— Two DIN rail adapters Obtain locall

7.5 mm (1-3/8 in. by 5/16 in.)Obtain locally: Each controller requires 5 in. : Part number TKAD, from Thomas

and Betts, two for each controller.

Cabling:

— Serial Interface Cable, male DB-9 to female

well

Hone AK3791

one twisted pair)

AK3792 (two twisted pairs Honeywell AK3781 (one

twisted pair

AK3782 (two

twisted pairs Honeywell AK3725

DB-9 or female DB-25.

ORKS

LONW

Bus (plenum): 22 AWG (0.34 mm twisted pair solid conductor, nonshielded or Echelon approved cable.

ORKS

LONW mm

Bus (nonplenum): 22 AWG (0.34

twisted pair solid conductor, nonshielded

or Echelon approved cable. Inputs: 18 AWG

1.0 mm

five wire cable

Obtain locall vendor.

Level IV 140°F

Standard thermostat wire

from any computer hardware

60°C) ratin

bundle

well AK3752 (typical or

Hone

uivalent

e Honeywell AK3702 (typical or

uivalent

well AK3712 (typical or

Hone

uivalent

well AK3754 (typical or

Hone

uivalent

Outputs/Power: 14 to 18 AWG (2.0 to 1.0 mm

18 AWG (1.0 mm

16 AWG (1.3 mm

14 AWG (2.0 mm

twisted pair

two conductor

NEC Class 2 140°F (60°C) ratin

Non-plenum

—

Step 6. Configure Controllers

Excel E-Vision PC Software is used to configure W7750 Controllers to match their intended application. The E-Vision

is printed on the terminal labels. Also see the wiring details in Fig. 27 in Step 4, Prepare Wiring Diagrams. The labeled I/O terminals are defined in Table 10.

User Guide, form number 74-2588 provides details for operatin

W7750 Controllers are sh ipp ed from the fac tor hardware configuration. On power-up, the controller confi Table 20 in Appendix C. The controller can operate normall in this mode setup controlled appropriatel default setpoint. The defa ult I/O ar ran

the PC software.

with a default

uration parameters are s et to the default values liste d in

if the equipment and wiring match the default

, and given valid sensor inputs, the outputs are

to maintain space temperature at the

ement for the W7750A

Step 7. Troubleshooting

Troubleshooting Excel 10 Controllers and Wall Modules

In addition to the following information, refer to the Installation Instructions and Checkout and Test manual for each product. Most products have a Checkout and Test section in their Installation Instructions manual. If not, look for a separate Checkout and Test manual. See the Applicable Literature section for form numbers.

74-2958—148

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(

TEMPERATURE (DEGREES)

40 50 60 70

100

110

RESISTANCE (OHMS)

20K OHM AT 77

F (25oC)

80K

70K

60K

50K

40K

30K

20K

10K

M11620

AIR TEMPERATURE SENSOR 10K OHM SETPOINT POT

RESISTANCE VALUES

(

Check the version numbers of the controller firmware, E-Vision and the E-Vision script.

Check the wirin there is a

Check the occupanc

Compare the current actual setpoint with the actual

to the power supply and make sure

ood earth ground to the controller.

and HVAC modes.

space temperature.

Check the desired confi

Check the network wiring and type of wire used.

Check the Zone Mana

uration settings.

er mapping and referred points.

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

NOTE: If the fan shuts off pe riodicall

and the controller rest arts the fan b

for no specific reason

itself after about 20 to 60 seconds, the cause could be a bad Air F low switch. If the controller has a di as a Proof of Air Flow input, tr

ital input to see if these shutdowns continue. If

ital input assigned

unconfiguring this

not, adjust or replace the Air Flow switch to get it workin

Temperature Sensor and Setpoint Potentiometer Resistance Ranges

The T7770 or T7560A,B Wall Modules or the C7770A Air Temperature Sensor has the followin points, which are plotted in Fi

Temperature (°F) Resistance Value (ohms)

98 11755 80 18478 70 24028 60 31525

42 52675 The T7770 Wall Module setpoint potentiometers have the followin

calibration points:

Temperature (°F) Resistance Value (ohms)

85 1290

70 5500

55 9846

specified calibration

. 40:

Fig. 40. Te mpe r ature sen sor resista nce plo ts.

Alarms

When an Excel 10 has an alarm condition, it reports it to the central node on the L Zone Mana alarm message is:

• Subnet Number:

ONWORKS

L that has the alarm condition. Subnet 1 is on the Zone

er side of the router; Subnet 2 is on the other

Mana side.

• Node Number: Excel 10 node that has the alarm condition Network Alarm).

• Alarm T Specific alarm bein the alarm types listed in Table 12 .

ONWORKS

Bus (typically, the Excel 10

. See Table 12. Information contained in an

Bus subnet that contains the Excel 10 node

see

pe:

issued. An Excel 10 can provide

Table 12. Excel 10 Alarms.

Alarm type

Name of alarm or error bit

RETURN_TO_NORMAL 128U Return to no alarm after bein

number Meaning of alarm code or error bit

in an alarm condition. This code is added

numericall

to another alarm code to indicate that the alarm condition has

returned to normal.

ALARM_NOTIFY_DISABLED 255U The alarm reportin

reported until DestManMode turns on alarm reportin

NO_ALARM 0 No alarms presentl

was turned off by DestManMode. No more alarms are

or on application restart.

detected.

INPUT_NV_FAILURE 1 One or more NV inputs have failed in receiving an update within their specified

FAILURE_DETECT_TIME.

NODE_DISABLED 2 The control al

orithm has stopped because the controller is in DISABLED_MODE, MANUAL or FACTORY_TEST mode. No more alarms are reported when the controller is in the DISABLED_MODE. Alarms continue to be reported if the controller is in the MANUAL or FACTORY_TEST mode.

SENSOR_FAILURE 3 One or more sensors have failed. FROST_PROTECTION_ALARM 4 The space temperature is below the frost alarm limit 42.8°F

INVALID_SET_POINT 5 One of the setpoints is not in the valid ran

mode is FREEZE_PROTECT. The alarm condition rema ins unti l the temp erature exceeds the alarm limit plus h

sterisis.

49 74-2958—1

6°C) when the

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

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(

M10094

SERVICE PIN BUTTON

Table 12. Excel 10 Alarms. (Continued)

Alarm type

Name of alarm or error bit

number Meaning of alarm code or error bit

LOSS_OF_AIR_FLOW 6 The Fan Status DI indicates that there is no air flow when the node is

commanding the fan to run. The c on t rol is sh ut d ow n a nd dis ab led until power is

cled or the node is reset. See NOTE below. The alarm is not issued until

c FanFailTime seconds have elapsed since the loss-of-flow condition was first reported

DIRTY_FILTER 7 The pressure drop across the filter exceeds the limit and the filter re

maintenance. The control runs normally.

SMOKE_ALARM 8 The smoke detector has detected smoke and the node has entered an

ency state.

emer

IAQ_OVERRIDE 9 The indoor air

uality sensor has detected that the indoor air quality is less than the desired standard and additional outdoor air is being brought into the conditioned space.

LOW_LIM_ECON_CLOSE 10 The economizer has to close be

dischar

e air temperature from going below the discharge temperature low limit.

ond the minimum position to prevent the

uires

NOTE: The node can be reset by switching the node to

MANUAL and then to the normal operating mode

see Fan Operation in Appendix B).

Also, the Excel 10 va riab les ,

AlarmLogX

where X is 1 through 5, that store the last five alarms to occur in the controller, are available. These points can be viewed throu

h XBS or

E-Vision. Certain alarm conditions are suppressed conditionall

follows:

Broadcasting the Service Message

The Service Message allows a device on the LONW to be positivel

identified. The Service Message contains the

controller ID number and, therefore, can be used to confirm

sical location of a particular Excel 10 in a building.

the ph There are three methods of broadcastin

the Service Message from an Excel 10 W7750 Controller. One uses a hardware service pin button on the side of the controller

. 41). The second uses the wall module pushbutton (see

Fi Fig. 43 and 44). By pressing the wall module pushbutton for more than four seconds, the controller sends out the Service Messa

e. The third involves using the PC Configuration tool,

as follows. When an

commissionin

Assign ID

command is issued from the

tool, the node goes into the SERVICE_MESSAGE mode for five minutes. In the SERVICE_MESSAGE mode, pressin

the Occupancy Override button on the remote wall module and 44 for override button location Messa are normal in the SERVICE_MESSAGE mode. Even if an

e to be broadcast on the network. All other functions

causes the Service

Excel 10 W7750 Controller does not have an Override button connected, it can broadcast the Service Messa network by temporarily shorting the Controller Bypass Input terminal to the Sensor Ground terminal on the W7750A,B,C

short terminals 3 and 5).

ORKS

Bus

see

refer to Fig. 43

e on the

The commissioning tool is used to perfo rm the ID Assignment task (see the E-Vision User’s Guide, form 74-2588).

Fig. 41. Location of the Service Pin Button.

W7750 Controller Status LED

The LED on the front and center of a W7750 Controller provides a visual indication of the status of the device. See

. 42. When the W7750 receives power, the LED should

Fi appear in one of the followin

Off—no power to the processor.

Continuousl

Slow Blink—controllin

Fast Blink—when the Excel 10 has an alarm condition.

On—processor is in initialized state.

allowable states:

, normal state.

74-2958—150

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

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W7750

31 3

0292

8272

625242

322 2

DI-4

GND

STATUS LED

M10095A

DI-2

VAC

DI-1

LED BYPASS

SNSR

SET PT AI-1

456

OHM

789

120 1

OUT

AI-3

V/mA

0111

OUT

AI-4

V/mA

918171

OUT

20VDC OUT

2131

OUT

VAC

COM

OUT

A1-2

OHM

Fig. 42. LED location on W7750.

T7770C,D Wall Module Bypass Pushbutton and Override LED

Pressing the bypass pushbutton, located on the T7770C,D Wall Modul es in Fig. 43, causes the override LED to display the Manual Override mode of the controller. The modes are:

Press and release the bypass pushbutton, located on the T7560A,B Di

ital Wall Modules in Fig. 44 for more than one second to cause the sun symbol on the bottom right side of the LCD displa

to appear. Pressing the bypass pushbutton for more than four seconds causes the controller, hard-wired to the T7560A,B, to The T7560A,B displa

o into continuous unoccupied override.

s the moon symbol.

BYPASS PUSHBUTTON

M17500

Fig. 44. The T7560A,B Digital Wall Module Bypass

pushbutton location.

APPENDICES

OVERRIDE LED

T7770C

OVERRIDE LED

BYPASS PUSHBUTTON

T7770D

M11617

Fig. 43. The T7770C,D Wall Modules LED and Bypass

pushbutton locations.

LED = Off. No override act ive.

LED = Continuously on. Bypass mode (timed Occupied override

LED = One flash per second. Continuous Unoccupied

override.

LED = Two flashes per second. Remote onl

, continu-

ous Occupied override.

T7560A,B Digital Wall Module Bypass Pushbutton and LCD Display Occupancy Symbols

See Fig. 44 for the T7560A,B Digital Wall Module bypass pushbutton location.

Appendix A. Using E-Vision to Commission a W7750 Controller.

NOTE: When commissioning a CVAHU W7750 Controller,

Sensor Calibration

The space temperature, the optional resistive and

current

module setpoint potentiometer Perform the sensor calibration b

either positive or negative) to the sensed value using E-Vision menus (see E-Vision user guide, form number 74-2588

When calibratin the offset amount entered b the inputs actual en information on how to derive the prope r voltage value to enter as an offset durin

Setting the Pid Parameters

The W7750 is designed to control a wide variety of mechanical s flexibilit temperature control in each different t

E-Vision first checks that the actual hardware model

such as W7750A,B,C) is the same type which was

selected from th e App licati on Se lectio n/Output ta b. If

pes do not match, t he downloa d does no t occur

the t and the user-entered values in the Application Selection screens all revert back to default val ues.

voltage/

(W7750B,C only) inputs can all be calibr ated. The wall

can not

be calibrated.

adding an offset value

voltage/current sensors on the (W7750B,C),

the user is in volts, regardless of

ineering units. See Appendix E for

calibration.

stems in many types of build ings. With this

, it is necessary to verify the stability of the

pe of application.

51 74-2958—1

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

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Occasionally, the PID parameters require tuning to optimize comfort and smooth e W7750A,B,C Controllers.

CVAHU Controllers are confi values of PID parameters as shown in Appe ndix C Table 21. If different values for these parameters are desired, Table 13

Equipment Configuration Single Stage Two Sta ges Three Stages Four Stages Series 60 Modulating (Floating) PWM Modulating

If the PID parameters require adjustment away from these values, arise parameters is made, the ad each change, the system should be allowed to st abiliz e so the effects of the chan further refinements can made, as needed, until the s operating as desired.

use caution

see CAUTION below). If any change to PID control

uipment operation. This applies to the

ured by E-Vision with default

Table 13. Recommended Values For PID Parameters.

Heat

Prop.

Gain

to ensure that equipment problems d o not

ustments should be gradual. After

e can be accurately observed. Then

Heat Integ. Gain

2 3000 0 10 2 3000 0 10 10 3 2000 0 10 3 2000 0 10 10

4.5 1500 0 10 4.5 1500 0 10 10 6 1000 0 10 6 1000 0 10 10 2 750 0 10 2 750 0 10 10 2 900 0 10 2 900 0 10 10

Heat Deriv. Gain

stem is

CAUTION

If large or frequent changes to PID control parameters are made, it is possible to cause e such as short c minimum run times were disabled in User Addresses DisMinClTime or DisMinHtTime can occur include wide swi n and excessive overdriving of modulating outputs.

If ad

ustment of PID paramete rs is required, use the following. In the items that fol low, the term, error, refers to th e difference between the measured space temperature and the current actual space temperature setpoint.

Proportional Gain

— The

determines how much impact the error has on the output

nal. Decreasing the Proportional Gain amplifies the

si effect of the error; that is, for a Proportional Gain cause s a hi

Integral Gain

— The

how much impact the error- over-time h as on the output

nal. Error-over-time has two components making up its

si value: the amount of time the error exists; and the size of the error. The hi control response. In other words, a decrease in Inte Gain causes a more rapid response in the output signal.

cling compressors (if the stage

also called Throttling Range)

iven error, a small

her output signal value.

(also called Integral Time) determines

her the Integral Gain, the slower the

uipment problems

. Other problems that

s in space temperature

ral

lists some recommended values to use as a starting point. These recommended values are based on past experience with the applications and in most cases do not re

ustment.

Heat Control Band

— The

Cool Prop. Gain

Derivative Gain

determines how much impact the error rate has on the output si chan temperature is going, either toward or away from the setpoint, and its speed— Derivative Gain causes a effect on the output signal.

control of modulatin the economizer dampers, and heating and cooling valves usin span throu to cause th e output signal to go from fully closed to fully open. Also, 10 percent of the Contro l Band value is the size of the motion occurs. For example, if controlling a cooling valve with Cascade Control enabled and with the dischar temperature within 0. 1 X D aTempClCtrlBd of the dischar setpoint, there is no change in the current valve position. The smaller the Control Band, the more responsive the control output. A lar control. Be careful not to set the Control Band too low and cause lar happen if the space or dischar noisy environments and t he value repo rted to the c ontroller is not stable used onl sta

nal. The error rate is how fast the error value is

. It can also be the direction the space

Control Band

Cascade Control. The Control Band dictates the

deadband

in modulating control, and has no purpose when

ed control is configured.

Cool Integ. Gain

is used onl

h which the discharge temperature must tr av el

around the setpoint where no actuator

er Control Band causes more sluggish

e over or under shoots (hunting). This can

such that it bounces). The Control Band is

Cool Deriv. Gain

also called Derivative Time)

uickly or slowly. A decrease in

iven error rate to have a larger

outputs, which includes controlling

for discharge temperature

e sensors or wiring are in

Cool Control Band

uire further

Econ Control Band

Appendix B. Sequences of Operation.

This Appendix provides the co ntrol sequences of operation for the models of the Excel 10 W7750 CVAHU Controller. The W7750A,B,C Controllers can be confi

of possible equipment arrangements. Table 14 and 15

variet

copied from Tables 3 and 4) summarize the avail able options. This Appendix provides a more detailed discussion of these options.

ured to control a wide

74-2958—152

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

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)

Common Operations

The Excel 10 W7750 Controller applications have many common operations tha t are ap pli ca ble re of heatin

, cooling, or economizer equipment configuration. These operations are available to the W7750A and the W7750B,C V ersi ons of the CVAHU Controller, and the I /O and network confi

urations for them are summarized in Table 14.

Available input options are from the wall module and the hard-wired analo have onl

a subset of these devices configured based on the number of ph inputs are available over the L

and digital inputs. Each application can

sical I/O points available. However, some of the

ONWORKS

Table 14. Common Configuration Options Summary For W7750A,B,C Controllers.

Option Possible Configurations Common To All W7750 Models Supply Fan Type of Air Handler

Occupancy Sensor

Window Sensor

Wall Module Option

The T77560A,B has no LONW

ORKS

Wall Module Type

All wall modules have a LONW

ORKS

ack except T7560A,B

Smoke Emergency Initiation

ardless of the type

Bus network.

1. Mandator

1. Conventional.

2. Heat Pump.

1. None.

2. Connected: Contacts closed e

3. Network (Occ/Unocc signal received via the LONW

1. None. sically Connected: Contacts closed equals windo w closed.

2. Ph

3. Network (Window Open/Closed signal received via the LONW

1. Local (direct wired to the controller).

Bus access)2. Network (sensor value received via the LONW

1. Sensor only.

Bus access 2. Sensor and Setpoint adjust.

3. Sensor, Setpoint adjust and Bypass.

4. Sensor and Bypass.

1. None. sically Connected: Contacts closed equals smoke detected.

2. Ph

3. Network (Emergency/Normal signal received via the LONW

NOTE: Each W7750 Controller

temperature sensor input either wired directl controller, or shared from another LONW device, and must hav e a d i controllin

the supply fan. In addition, if modulating economizer control is desired, a discharge air temperature sensor

must

the Excel 10 W7750 Controller. A dischar temperature signal controller throu

cannot

h the LONW

Digital Output.

uals Occupied.

must

have a space

to the

ORKS

Bus

ital output configured for

be physically connected to

be brought into the

ORKS

Bus network.

ORKS

Bus network).

ORKS

Bus).

ORKS

Bus).

ORKS

Bus).

53 74-2958—1

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

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Table 15. Configuration Options Summary For W7750A,B,C Controllers.

Possible Configurations for the

Option Type of Heating

1. One stage. 1. One stage.

2. Two stages. 2. Two stages.

W7750A Model Possible Configurations for the W7750B,C Models

3. Three stages. 3. Three stages.

4. Four sta

es. 4. Four stages.

5. None. 5. Series 60 Modulatin

6. Pulse Width Modulatin

7. None.

Type of Cooling

1. One sta

2. Two sta

3. Three sta

4. Four sta

e. 1. One stage.

es. 2. Two stages.

es. 3. Three stages.

es. 4. Four stages.

5. None. 5. Series 60 Modulatin

6. Pulse Width Modulatin

7. None.

Type of Economizer

1. Digital Output Enable/Disable nal for controlling an external

si economizer packa

2. Series 60 Modulatin

electric

damper motor, or pneumatic via

ital Output Enable/Disable signal for controlling an external

1. Di economizer packa

2. Series 60 Modulating electric damper motor, or pneumatic via transducer.

transducer.

3. None. 3. Pulse Width Modulatin transducer.

4. None.

IAQ Option

1. None. 1. None.

2. Local IAQ Di

ital Input—directly

wired to the controller.

Contacts

2. Local IAQ Digital Input—directly wired to the controller. (Contacts closed means poor IAQ is detected.

closed means poor IAQ is detected.

3. Network (IAQ Override signal received via the LONW

ORKS

Bus).

3. Network (IAQ Override signal received via the LONW

4. Local CO must be a 0 to 10V device representin

Coil Freeze Stat Option

1. None. 1. None.

2. Local Coil Freeze Stat Di

ital

Input—directly wired to the controller.

2. Local Coil Freeze Stat Digital Input—directly wired to the controller.

Contacts closed means that coil freeze condition is sensed.

Contacts closed means that coil

freeze condition is sense d.

Filter Monitor Option

1. None. 1. None.

2. Local Dirty Filter Digital Input—directl controller.

wired to the

Contacts closed means

2. Local Dirty Filter Digital Input—directly wired to the controller. Contacts closed means that the filter is dirty.

that the filter is dirty.

3. Local Analog Input for Differen tial Press ure across the Filter (directly

wired to the controller). The sensor must be a 2 to 10V device representin

electric valve, or pneumatic via transducer.

electric damper motor, or pneumatic via

ORKS

Bus).

Analog Input—directly wired to the contro ller . (The sensor

0 to 2000 PPM CO2.

0 to 5 inw (1.25 kPa).

ROOM TEMPERATURE SENSOR (RmTemp)

This is the room space temperature sensor. This sensor is the T7770 or the T7560A,B Wall Module. When it is configured, it provides the temperature input for the W7750 temperature control loop. If it is not confi

ured, it is required that a room

ORKS

LONW

Bus device. If no valid room temperature value is

available to the W7750 Controller, the temperature control

orithm in the controller is disabled, causing the heating,

, and economizer contro l outputs to be turned of f. If the

coolin W7750 Controller is configured for Continuous Fan (rather

temperature sensor value be transmitted from another

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EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

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than Intermittent Fan (see Fan Operation in this Appendix), and the mode is Occupied w hen the R mTemp value becomes invalid, the fan continues to run.

REMOTE SETPOINT (RmtStptPot)

This is the Setpoint Potentiometer contained in the T7770 or the T7560A,B Wall Module. When confi

ured, this occupant value is set to calculate the actual cooling or heating Occupied Setpoint. Th ere are two o ptions for how to c alcul ate the actual setpoint to be used b

the temperature control algorithm: (Offset) and (Absolute Middle). When SetPtKnob is set to Offset, the Wall Module setpoint knob represents a number from -9° to +9°F

-5° to +5°C) which is added to the

software occupied setpoints for the heat and the cool modes

CoolOccSpt and HeatOccSpt). When SetPtKnob is set to Absolute Middle, the setpoint knob becomes the center of the Zero Ener occupied setpoints . The si ze of th e ZEB is fo und b difference be tween the s oftware heat in

Band (ZEB) between the cooling and heating

taking the

and cooling occupied setpoints; therefore, for Absolute Middle, the actual setpoints are found as follows:

ActualCoolSpt

RmtStptPot +

CoolOccSpt - HeatOccSpt) / 2

ActualHeatSpt

RmtStptPot -

CoolOccSpt - HeatOccSpt) / 2

Standby and Unoccupied times, the remote setpoint

Durin pot is not referenced, and the software setpoints for those modes are used instead.

SETPOINT LIMITS (LoSetptLim AND HiSetptLim)

Remote setpoint pot limits are provided b

LoSetptLim and

HiSetptLim. The occupied setpoints used in the control

orithms are limited by these parameters. When the setpoint

al knob is confi actual setpoint allowed is e

ured to be of type Absolute Middle, the lowest

ual to LoSetptLim, and the highest actual setpoint allowed is equal to HiSetptLim. When the setpoint knob is confi actual setpoint allowed is e

ured to be an Offset type, the lowest

ual to HeatOccSpt - LoSetptLim, and the highest allowed is equal to CoolOccSpt + HiSetptLim.

BYPASS MODE (StatusOvrd AND StatusLed )

During Unoccupied periods, the facility occupant can request that Occupied temperature control setpoints be observed b depressing the Bypass pushbutton on the wall module. When activated, the controller remains in B

pass Duration Setting has timed out (BypTime), or

User a switch off B

Occupanc TimeClckOcc di

ain presses the Wall Module pushbutton to

pass mode, or

schedule (DestSchedOcc network input or

ital input) switches the mode to

pass mode unt il:

Occupied.

User sets the DestManOcc network point to Not

ned.

Assi The LED on the T7770 Wall Modu le the current b

pass mode status (see the T7770C,D Wall

Override LED) indicates

Module Bypass Pushbutton and Override LED section). The LCD on the T7560 Di

pass mode status (see the T7560A,B Digital Wall Module

ital Wall Module indicates the current

Bypass Pushbutton and LCD Occupancy Symbols section).

BypassTime

BypassTime is the time between the pressing of the override button at the wall module

or initiating OC_BYPASS via nviManOcc) and the return to the original occupancy state. When the b is set to B

pass state has been activated, the bypass timer

passTime (default of 180 minutes).

OverrideType

OverrideT

pe specifies the behavior of the override button on the wall module. Ther e are three p ossi ble st ates th at hav e the followin

meanings:

NONE disables the override button. NORMAL causes the override button to set the OverRide

state to OC_BYPASS for B minutes for approximatel

, when the override button has been pressed

1 to 4 seconds, or to set the OverR ide

passTime (default 180

state to UNOCC when the button has been pressed for approximatel pressed lon

4 to 7 seconds. When the button is

er than approximately 7 seconds, then the

OverRide state is set to OC_NUL (no manual override is

active

BYPASS_ONLY causes the override button to set the

OverRide state to OC_BYP ASS for B 180 minutes

, on the first press (1 to 7 seconds). On the

passTime (default

next press, the OverRide state is set to OC_NUL manual over ride is active).

OverridePriority

OverridePriorit nviManOcc, nviB

configures the override arbitration between

pass.state, and the wall module override button. There are t wo pos sible s tates w hich have the followin meanings:

LAST specifies that the las t c omma nd rec eiv ed from e ithe r

the wall module or nviManOcc determines the effective override state.

NET specifies that when nviManOcc is not OC_NUL, then

the effective occupanc

is nviManOcc regardless of the

wall modul e override state.

CYCLES PER HOUR (ubHeatCph AND ubCoolCph)

ubHeatCph specifies the mid-load number of on / off cycles per hour

default is 6), when the mode is HEAT. ubCoolCph

specifies the mid-load number of on / off cycles per hour

default is 3), when the mode is COOL. This is to protect the

mechanical e

uipment against short cycling causing excessive wear. In addition the cycle rate specifies the minimum on and off time accordin

T7770C,D OR T7560A,B WALL MODULE BYPASS PUSHBUTTON

to Table 17.

OPERATION

The Wall Module B

pass pushbutton is located on both the T7770C,D or the T7560A, B W all Mo dules, se e Fi The b

pass pushbutton can c hange the controller into v arious

occupanc

modes, see Table 16.

Table 16. Bypass Pushbutton Operation.

If the pushbutton is

held down for

But for not

more than The resulting mode is

Less than 1 second — No Override is active 1 second 4 seconds Bypass (a timed Occupied

Override

4 seconds 7 seconds Continuous Unoccupied

Override

NOTES: If the pushbutton is held down for lon

seconds, the controller reverts back to No Override and repeats the c

cle above. See Fig. 45. Continuous Occupied override mode can onl initiated remotel

; that is, over the LONW

network.

. 43 and 44.

er than seven

ORKS

Bus

55 74-2958—1

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

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RESET

NOT ASSIGNED

(LED OFF)

PRESS FOR LESS THAN ONE SECOND

BYPASS OCCUPIED

PRESS FOR LESS THAN ONE SECOND

UNOCCUPIED

(LED BLINK)

Fig. 45. LED and Bypass pushbutton operation.

STANDBY MODE (StatusOcySen)

The digital input for an occupancy sensor (usually a motion detector or possibl

a time clock) provides the controlle r with a means to enter an energy-saving Standby mode whenever people are not in the room. Standb scheduled occu panc

is Occupied, and the occupan cy sensor

mode occurs when the

detects no people currently in the room (digital input contacts Closed means people are in the room, and contacts Open means the room is Unoccu pied

. When in Standby mode, the Excel 10 W7750 Contro ller uses the St andby Cooling Setpoint for coolin Heatin

CoolStbySpt), or the Standby Heating Setpoint for

HeatStbySpt) as the Actual Space Temperature Setpoint. The occu pan cy sensor signal can also be a ne tw ork input from another L sensor is re

uired at the receiving W7750 Controller.

ONWORKS

Bus device, s o that no physical

IMPORTANT

When the W7750 Controller is in Standby mode, the economizer minimum position setting is

not

observed. This means the fresh air dampers will go fully closed if there is no call for cooling.

CONTINUOUS UNOCCUPIED MODE

This mode is entere d w h en a w a ll mo dule is confi

pass pushbutton that was pressed for four to seven

B seconds causin

the wall module LED/LCD to blink. This

ured with a

mode can also be entered via a network command

ManualOcc set to Unoccupied). If the controller is in this mode, it reverts to the Unoccupied setpoints for temperature control, and the economizer does not observe its minimum position settin indefinitel

. The controller remains in this mode

until the Bypass pushbutton is pressed to exit the

mode or a network command is sent to clear the mode. A

uration parameter is available to disable wall-module

confi initiation of Continuous Unoccupied mode

OvrdType).

PRESS FOR ONE TO FOUR SECONDS

(LED ON)

PRESS FOR FOUR TO SEVEN SECONDS

PRESS FOR MORE THAN SEVEN SECONDS

BYPASS TIMEOUT

M8483A

OCCUPANCY MODE AND MANUAL OVERRIDE ARBITRATION

The W7750 has multiple sources for occupanc information and, there fore, it emplo

s an arbitration scheme to determine the current actual mode. Time-of-day (TOD) schedule status comes from two sources, a confi input for OccTimeClock or the DestSchedOcc network input received from a central control. If the di

ured, it has highest priority and determines the

confi Occupanc

mode. This digital input is either ON (shorted =

ital input source is

occupied), OFF (open = unoccupied), or not active (not

ured); otherwise, the status is determined by the

confi DestSchedOcc input from the netwo rk sou rce . The DestSchedOcc has three possible states, occupied, unoccupied or standb

Manual Override Status can be derived from three sources

overned by two selectable arbitration schemes. The two

and schemes are:

• Network Wins or Last-in Wins, as set in OvrdPriorit The three sources of manual override status are:

DestManOcc - Has possible states: Occupied,

Unoccupied, B

ned (not active). This input source

Assi

pass, Standby and Not

has the highest priority in determining manual override status for a Network Wins arbitration scheme, and in the event there is more than one source

e at a time in the Last-in Wins

chan arbitration scheme. Here, b initiates a self-timed bypass of the control unit and expires upon completion of the defined timed period. The controller then treats the b status of this input as Not Assi the next chan

e in status.

schedule

ured digital

pass

ned until

74-2958—156

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

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y (By

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HEAT RECOVERY RAMP RATE (DEGREES/HOUR)

MaxHtRam

MinHtRam

OaTempMinHtRa OaTempMaxHtRam

OUTDOOR AIR TEMPERATURE

M10109

DestBypass - Has possible states: Bypass On,

pass Off or Not Assigned (not active).

B This input places the controller in an

untimed

bypass state or turns off the

pass mode. This source is second in priority to DestManOcc under the same arbitration schemes mentioned above.

Override Button -The wall module Override pushbutton

can command status of B

pass,

Continuous Unoccupied and Not

ned. This source has the lowest

Assi

status in the above mentioned

priorit schemes. The above menti on sources of override must be either Not As si or Off before the Override pushbutton affects the manual overri de status in the Network Wins scheme. All actions, in this case, taken from the Override pushbutton are locked out.

pass status is a controller-timed

B event whose durati on i s set i n B

pTime. Upon expiration of the timer, the status returns to Not Assi

ned. The status of this input can be overridden with the receipt of Not Assi

ned from DestManOcc. This, in effect, cancels a timed b

pass or a continuous

unoccupied mode.

ned

SETPOINT RAMPING

The W7750 Controller incorporates a ramping feature that

radually changes the space setpoints between occupancy

modes. This feature is onl

operational if the n etw o rk v ari abl e

inputs DestSchedOcc, TodEventNext, and Time Until Next

e Of State (TUNCOS) are being used to change the

Chan W7750 Occupanc

mode. The applicable Setpoints are OaTempMinHtRamp, OaTempMaxHtRamp, MinHtRamp and MaxHtRamp

for HEAT mode operation), and OaTempMinClRamp, OaTempMaxClRamp, MinClRamp and MaxClRamp

for the COOL mode operati on). See Fig. 46 for a

pictorial representation of how these setpoints interact.

recovery operation, the setpoint changes at a rate in

Durin

rees per hour depending on the outdoor air tempe rature. If

de there is no outdoor ai r temperature sensor available, then MinHtRamp is used as the recover

rate.

The Override pushbutton can be confi

ured as Normal (all of the above mentioned states are p oss ib le Onl

pass and Not Assigned only) or

, Bypass

None (effectively Disabling the Override pushbutton

TIME CLOCK (Occ_Time_Clock)

OccTimeClock is the state of the digital input configured and wired to a time clock. When the digital input is detected to be Closed OC_OCCUPIED. If the detected state of the di

Occupied), the scheduled occupancy will be

ital input is Open (Unoccupied), then the scheduled occupancy will be OC_UNOCCUPIED. If the Occ_Time_Clock is not confi

ured, then either the DestSchedOcc network input received from a central control or the time clock that is broadcast from a Sched_Master confi

ured W7750, controls the occupied

mode.

SCHEDULE MASTER (Sched_Master)

Sched_Master is the state of a digital input that is configured and wired to the W7750. If the Sched_Master input is closed

input shorted), the node is the sc he dul e m as ter and the state of the locally connected time clock will be broadcast out over the L

ONWORKS

Bus to the other W7750 controllers. If the Sched_Master input is open, then the node is not a schedule master and the local time clock will not be sent out over the

ONWORKS

Bus even if the time clock input is configured. However, the DestSchedOcc network input received from a central control has a hi

her priority than the local time clock, and therefore overrides the local time clock. The W7750 controllers automaticall

bind without the need for a

configuration tool.

Fig. 46. Setpoint ramping parameters with ramp rate

calculation.

NOTE: Recover

ramping applies between scheduled heating or cooling setpoint changes from UNOCCUPIED to STANDBY, UNOCCUPIED to OCCUPIED, and STANDBY to OCCUPIED. Scheduled setpoint chan

es from OCCUPIED to UNOCCUPIED or OCCUPIED to STANDBY do not use a ramped setpoint but in stead use a step chan in setpoint. Recovery ramps begin before the next scheduled occupanc setpoint for the existin to the setpoint for the next occupanc

time and are ramped from the

scheduled occupancy state

state.

RECOVERY RAMPING FOR HEAT PUMP SYSTEMS

When the node is controll ing heat pump equipment, during the recover setpoint auxiliar chan

ramps, the heating setpoint is split into a heat pump

for compressors) and an auxiliary heat setpoint (for

heat stages). The heat pump setpoint is a step

e at the recovery time prior to the OCCUPIED time. Recovery time is computed fro m the con figured heat recovery ramp rate. The recover Recover

See Fi

time = (OCC setpoint - current setpoint)/ramp rate

. 47 for the various setpoints.

time is calculated:

57 74-2958—1

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

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HEAT PUMP SETPOINT (FOR COMPRESSORS)

OCC setpoint

AUX HEAT SETPOINT

UN_OCC setpoint

STANDBY setpoint

RECOVERY TIME

OCCUPIED TIME

Fig. 47. Setpoint ramping parameters with setpoint

calculation.

Durin

the COOL recovery period, the setpoint changes at a rate in degrees per hour relative to the outdoor air temperature. If there is no outdoor air temperature sensor available, the MinClRamp is used as the recover

See Fi

. 48 for the various setpoints.

COOL RECOVERY RAMP RATE (DEGREES/HOUR)

MaxClRam

rate.

M10110

Standb for coolin

or Unoccupied modes, the fan cycles on with a call

or heating if the FanOnHtMode parameter is set). In Intermittent Fan mode, the fan cycles on with a call for coolin c

The fan control suppo rts a n op tio nal input, that allows monitorin

or heating if the FanOnHtMode param eter is set), and

cles off when the space temperature control is satisfied.

Proof of Air Flow) digital

of the supply fans status. If the fan is commanded on, the Proof of Air Flow digital input is checked up to three times to ve rif an initial dela

of FanOnDelay seconds (user-settable). If the

that the fan is running

after

fan fails to start the CVAHU must be reset by first cycling CVAHU power. If this does not work, set DestManMode to Manual and then back to Enable. After a reset the application restarts—all outputs switch off and auto control is enabled.

Also, the W7750 Controller provid es fan-run-on ope ration that keeps the fan runnin

for a short time after heating or cooling shuts off. The amount of time that the fan continues to run is set in FanRunOnHeat for heatin

mode and FanRunOnCool

for cooling mode.

WINDOW SENSOR (StatusWndw)

The digital input for a window contact provides the algorithm with a means to disable its temperature control activities if someone has opened a window or door in the room. When a window is detected to be Open

uals window open), the normal temperature control is

ital input contacts Open

disabled, and the W7750 Control ler enters the Freeze Prote ct mode. Freeze Protec t mode sets the spa ce setpo int to 46 .4 °F

8°C) and brings on the fan an d h eat if the s pac e temperature falls below this setpoint. Normal temperature control resume s on window closure. The Window sensor si network input from another L

ONWORKS

nal can also be a

Bus device, so that no

physical sensor is required at the receiving W7750 Controller.

MinClRam

OUTDOOR AIR TEMPERATURE

OaTempMinClRa OaTempMaxClRam

Fig. 48. Setpoint ramping parameters with ramp rate

calculation.

NOTES: The setpoint used durin

is similar to the heat mode in Fi slope of the line reverses for coolin

Recover in

ramping applies between scheduled heat-

or cooling setpoint changes from UNOCCUPIED

the COOL recovery period

. 46, except the

to STANDBY, UNOCCUPIED to OCCUPIED, and STANDBY to OCCUPIED. Scheduled setpoint

es from OCCUPIED to UNOCCUPIED or

chan OCCUPIED to STANDBY do not use a ramped setpoint, but instead, use a step chan Recover

ramps begin before the next scheduled

e in setpoint.

occupancy time and are ramped from the setpoint for the existin point for the next occupanc

scheduled occupancy state to the set-

state.

FAN OPERATION

The W7750 suppl

fan can be controlled in one of two different w ays. In Continuous Fan mode, the fan runs whenever the controller is in Occupied mode. When in

M10111

SMOKE CONTROL

The Excel 10 W7750 C on trol ler su ppo rts three smoke-related control strate

Emergency Shutdown (all outputs off).

Depressurize

Pressurize

ies:

fan on, outdoor air damper closed).

fan on, outdoor air damper open).

The controller is placed in one of these three control states whenever the W7750 mode becomes SMOKE_EMERGENCY, which can be initiated via a network command connected

DestEmergCmd) or from a local (physically

smoke detect or digital input. When in SMOKE_EMERGENCY mode, the W7750 C ontroller uses the control strate above

, and the normal temperature control function is

found in SmkCtlMode (one of the three listed

disabled. If a W7750 local smok e detector trips, the SrcEmer network variable

for other LONW

ORKS

Bus devices to receive)

is set to the Emergency state.

DEMAND LIMIT CONTROL (DLC)

When The LONW demand si

ORKS

Bus network re ceives a high-electrical-

nal, the controlle r applies a DlcBumpTemp amount to the current actual space temperature setpoint value. The setpoint is alwa This means t hat if the W7 750 Controller is in Coolin

s adjusted in the energy-saving direction.

mode, the DLC offset bumps the control point up, and when in Heatin

mode, bumps the control point down.

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DIRTY FILTER MONITOR

The air filter in the a ir han dler c an be mon itored b

the W7750 and an alarm issued w hen the filte r media needs replacement. The two methods of monitorin

A differential pressure switch whose contacts are connected to a di

ital input on the W7750A or W7750B,C;

the filter are:

and

A 2-to-10V differential pressure sensor wired to a current input on the W7750B,C. If the analo

input

sensor is used, its measured value 0 to 5 inw

0 to 1.25 kPa) is compared to a user-selectable

setpoint

FltrPressStPt—valid range: 0 to 5 inw

0 to 1.25 kPa)), and the Dirty Filter alarm is issued when the pressure drop across the filter exceeds the setpoint.

START-UP

START_UP_WAIT is the first mode after application restart or power-up. Durin

START_UP_WAIT, the analog and digital inputs are being read for the first time, no control algorithms are active, and the ph

are in the de-ene rgized position. Th e n ode re mains in

sta

OA TEMP

sical outputs (fan and heat/cooling

FILTER

the START_UP_WAIT mode for a pseudo-random period

depending on neuron_id) between 12 and 22 seconds and then transitions to one of the operating modes, depending on the inputs that are read from the ph

sical and network inputs. The pseudo random period prevents multiple controllers from simultaneousl restored to a buildin

starting major electrical loads when power is

NOTES: After a controller download via Care/E-Vision, the

ed reset time is bypassed and the controller

dela starts after a 40-second initialization.

Not all ne twork inputs can be rec eived durin START_UP_WAIT period because man

the

network variables are updated at a slower rate; therefore some control decisions can be considered tempo-

inappropriate.

raril

Temperature Control Operations

See Fig. 49 for a diagram of a typical W7750 Unit.

COOL COIL

HEAT COIL

OUTDOOR AIR

RETURN AIR

RA TEMP

WINDOW CONTACT

FAN

T7770 OR T7560A,B

EXCEL 10 W7750 CVAHU

DA TEMP

OCCUPANCY SENSOR

DISCHARGE AIR

ROOF

CEILING

M17488

Fig. 49. Schematic diagram for a typical W7750B Unit.

59 74-2958—1

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

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(

STAGED COOLING CONTROL

The Excel 10 W7750 Controller supports up to four sta D/X coolin Coolin

. As space temperature rises above the current

Setpoint, the controllers mode of operation is

es of

switched to the COOL mode. When in the COOL mode, all

outputs are driven closed or off (with the exception

heatin that occurs durin

IAQ Override Operation, see above), and the staged cooling outputs are enabled for use. When in the COOL mode, the PID coolin

control algorithm compares the

current space temperature to the EffectiveCoolSetPt, and

PID

ERROR

NO. STAGES

CONFIGURED

0% 25% 33% 50% 66% 75% 100% > 100%

ONE STAGE

TWO STAGES

THREE STAGES

STAGE 1

CYCLING

STAGE 1

CYCLING

STAGE 1 LOCKED ON

STAGE 2 CYCLING

calculates a PID error si

stage outputs to be cycled as required to drive the

coolin

nal. This error signal causes the

space temperature back to the set poi nt. Fig. 50 illustrates the relationship between PID error and sta the error si

nal increases and the space temperature is

ed output activity. As

etting farther away from setpoint, or is remaining above

setpoint as time elapses, add iti ona l sta

ized until, if PID error reaches 100 percent, all

ener

es of cooling are

configured stages are on.

CYCLING

STAGE 1 LOCKED ON

STAGE 2 CYCLING

STAGE 1,2 LOCKED ON

STAGE 3 CYCLING

ALL STAGES

LOCKED ON

ALL STAGES

LOCKED ON

ALL STAGES

LOCKED ON

STAGE 1

LOCKED ON

STAGE 2

CYCLING

FOUR STAGES

STAGE 1

CYCLING

Fig. 50. Staged output control versus PID Error.

If economizer dampers are confi

ured, and the outdoor air is

suitable for free cooling, the economizer operates as the first

e of cooling. For example, if a controller was configured

sta with two sta application should be viewed in Fig. 50 as a

stem.

s Setpoints for the PID

the control loop, if re

es of mechanical cooling and an economizer, the

three

-stage

ains allow for unit-by-unit adjustment of

uired; however, any change from the

default values should be minimal. The PID control al

anticipator-driven, and is similar to the al

orithm used to control staged cooling is

orithm used in the T7300 commercial thermostat. All staging events are subject to a minimum intersta

cles per hour user setting (CoolCycHr). The minimum

e time delay, which is based on the

interstage time delay ranges from 90 seconds (at 12 cycles per hour

to 8.5 minutes (at two cycles per hour), see Table

17. The user has the option to disable the minimum run timer

DisMinClTimer for cooling). If the minimum run timer is

disabled, the intersta

cling rate is separately selectable for heating and cooling

e time delay is fixed at 20 seconds. The

between 2 and 12 cycles per hour (cph).

STAGE 1,2

LOCKED ON

STAGE 3

CYCLING

STAGE 1,2,3

LOCKED ON

STAGE 4

CYCLING

ALL STAGES

LOCKED ON

M10112

T a ble 17. Inters tage Minim um Times

Cycles/Hour Selection Minimum On/Off time (Min.)

28.5

35.5

44.0

53.5

63.0

72.5

82.0

92.0 10 2.0 11 1.5 12 1.5

STAGED HEATING CONTROL

The Excel 10 W7750B,C Control ler supports up to four stages of heatin Coolin

. As space temperature falls below the current

Setpoint, the control ler mode of operation is switched to the HEAT mode. When in the HEAT mode, all cooling outputs are driven closed or off, and the sta

ed heating

outputs are enabled for use. When in the HEA T mod e, the PID

74-2958—160

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

ging

)

g (

(

)

(

)

(

g (

cooling control algorithm compares the current space temperature to the EffectiveHeatSetPt, and calculates a PID error si outputs to be c temperature back to the Setpoint. Fi

nal. This error signal causes the heating stage

cled, as required, to drive the space

. 50 illustrates the

relationship between PID error and staged output activity. As the error si

nal increases, the space temperature gets further away from the setpoint, or is remaining below the setpoint as time elapses, additional sta

ized until, if PID error reaches 100 percent, all

ener

es of heating are configured stages are on. The PID control al

orithm used to control staged heating is anticipat or-driven, and is similar to the algorithm used in the T7300 commercial thermostat. All sta to a minimum intersta

e time delay, that is based on the

events are subject

cycles per hour user setting (HeatCycHr). The minimum intersta per hour

e time delay ranges from 90 seconds (at 12 cycles

to eight minutes (at two cycles per hour). See Table

17. The user has the option to disable the minimum run timer for heatin disabled, the intersta

DisMinHtTimer). If the minimum run timer is

e time delay is fixed at 20 seconds. The cycling rate is separately selectable for heating and cooling between two and 12 c

Setpoints for the PID the control loop, if re

cles per hour (cph).

ains allow for unit-by-unit adjustment of

uired; however, any change from the

default values should be minimal.

CASCADE CONTROL OF MODULATING COOLING/HEATING

The Excel 10 W7750 Controller supports modulating cooling and heatin from the space temperature

valves. These valves can be controlled directly

like the staged control) or, if the CascCtrl flag is set, they are modulated to maintain the dischar

e air temperature at its setpoint. The discharge air setpoint is calculated based on the space temperature deviation from the space setpoint. This is commonl

called cascade control. In the W7750 Controller, cascade control is available for use with PWM

W7750B,C only) and Series 60

modulating heating and cooling, but not for use with staged

/cooling.

heatin Setpoints for the PID

-unit adjustment of the control loops, if required;

unit-b however, an

change from the default values should be

ains and for the control band allow for

minimal. Also, the W7750 Controller uses an adaptive

orithm (patent pending) to continuously assess the validity

al of the calculated dischar

e setpoint, and adjust it, as needed,

to ensure precise, accurate control.

SERIES 60 MODULATING CONTROL

Series 60 Control is also commonl

referred to as Floating Control. The Excel 10 W7750A,B,C Controllers can drive Series 60 t a heatin

pe actuators to con trol a m odulating cooling valve,

valve, and economizer dampers. When floating control is used, the full-stroke motor drive time of the actuator must be entered into the confi

uration parameter CoolMt rSpd

for cooling), HeatMtrSpd (for heating), or EconMtrSpd (for the

economizer dampers

PULSE WIDTH MODULATING (PWM) CONTROL

The Excel 10 W7750B,C Controllers can drive a PWM-t actuator to control a modulatin

cooling valve, a heating

valve, and economizer dampers. PWM control positions the

actuator based on the len

ital output. The co ntro ller outputs a pulse whose length

the di

th, in seconds, of the pulse from

consists of two parts, a minimum and a maximum. The minimum pulse time represents the analo percent

also indicates a signal presence) and the maximum

value of zero

pulse length that represents an anal og value of 100 percent. If the analo time is added to the minimum pulse time. The len

value is greater than zero percent, an additional

th of time added is directly proportional to the magnitude of the analog value. If PWM control is used, the confi

uration parameters for the PWM operation must be specified. These are PwmPeriod, PwmZeroScale, and PwmFullScale. These three parameters are shared b means the heatin

all configured PWM out puts; this

, cooling, and economizer actuators must

be configured to accept the same style of PWM signal.

Example

: To find the pulse width of a valve actuator

for example stroke mid position - 50 percent) with the PwmZeroScale = 0.1 seconds, PwmFullScale = 25.5 seconds, and the PwmPeriod = 25.6 seconds. There are 256 increments available, so the number of increments re for 50 percent would be increment for this industr

0.5 X 256) or 128. The time for each standard pulse time is 0.1 seconds.

uired

The pulse width is the minimum time (0.1 second) + the number of increments

128 times the (0.1 second) plus 0. 1) =

12.9 seconds. The W7750B,C Controllers would command the valve output on for 12.9 seconds for the PwmPeriod of

25.6 seconds to maintain the valve position at 50 percent.

OUTDOOR AIR LOCKOUT OF HEAT ING/COOLING

A mechanism is provided in the W77 50 to dis abl e the he ati n equipment if the outdoor air temperature rises above the OaTempHtLkOut setpoint. Similarl

, the cooling equipment is disabled if the outdoor air temperature falls below the OaTempClLkOut setpoint. The al

orithm supplies a fixed 2°F

1.1°C) hysteresis with the lock-out control to prevent short cling of the equipment.

ECONOMIZER DAMPER CONTROL

A mixed-air economizer dampe r packa assist mechanical coolin

in maintaining the discharge air at

setpoint. Therefore, if modulatin

e can be controlled to

economizer damper control is desired, a discharge air temperature sensor is required. If the outdoor air is not currentl Economizer Enable/Disable Control section

suitable for cooling use (see the

, the outdoor air

damper is held at the user-settable minimum position

EconMinPos) for ventilation purposes.

Because the outdoor air can be used to supplement mechanical coolin first sta coolin

e of cooling. So, if the outdoor air is suitable for

use, the mechanical cooling (either staged or

modulatin

open position. Then, if the discharge temperature

full

, the economizer operates as if it were the

is held off until the economizer has reached its

continues to be above setpoint, the mechanical cooling is

not

allowed to come on. If the outdoor air is

use, the economizer is set to its minimum position,

coolin

suitable for and mechanical cooling is allowed to come on immediately. When the controller is in the Heat mode, the econo mi zer is

held at the minimum position settin minimum position settin operation. When in Standb

is only used during Occupied mode

or Unoccupied modes, the

EconMinPos). The

outdoor air dampers a re allow ed to fully close if there is no call for coolin

, or if the outside air is not suitable for cooling use.

61 74-2958—1

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

(

)

(

INDOOR AIR QUALITY (IAQ) OVERRIDE

The Excel 10 W7750 Controller supports an IAQ override feature that upon detection of poor air quality in the space, allows the economizer dampers to be opened above the standard minimum position settin EconIAQPos. Two different methods of detectin

uality are supported, The first is by using an IAQ switch device connected to a digital input on the W7750 Controller, where a contact closure ind icate s poor air the IAQ override mode. The second, which is onl on the W7750B,C is through an analog input that connects to

Sensor (0 to 10V). The measured value of CO2 from

a CO

this sensor IAQSetpt. When the CO2 level is higher than the setpoint (800 PPM 50 PPM, IAQ override is deactivated at a CO 750 PPM.

When the W7750 Controller is in the COOL mode during an IAQ override, it is possible for the activated. This can occu r if the o utdoor air tem perature is co ld enou the DaTempLoLim setpoint when the dampers open to the EconIAQPos position , situation occurs, the heating is controlled to maintain the dischar DaTempLoLim setpoint.

FREEZE STAT

Upon receiving a contact closure, the W7750 control algorithm will close the outdoor air damper and open the hot water and chilled water valves position as a safet desired, the Freeze Stat device must provide the physical pushbutton, which the operator presses, to reset the s after a

0 to 2000 ppm) is compared to the setpoint

, the IAQ override is initiate d. The IAQSe tpt hysteresis is

h to cause the discharge air temperature to drop below

and

the IaqUseHeat flag is set. If this

e air temperature at 1°F (0.65°C) above the

precaution. If

freeze

condition has occurred.

to a value set in

heating

if available) to the full open

manual-reset

poor air

uality and initiates

available

level less than

outputs to be

operation is

stem

6. Outdoor Enthalpy, Type D—

enthalpy meets the H205 type D requirements, the outdoor air is suitable to augment cooling.

7. Differential Temperature —

outdoor temperature and return air temperature is compared to DiffEconEnTemp to determine whether outdoor air or return air is more suitable for use to

ment mechanical cooling.

8. Single Calculated Enthalpy—

enthalp

OaEnthEn) in btu/lb, and the outdoor temperature is

compared to the outdoor temperature limit setpoint

OaEconEnTemp) for a high limit. The compared difference determine s whether outd oor air is suit able for use to au

9. Differential Enthalpy, Either Sensed or Calculated—

the difference between outdoor enthalp enthalpy determines whether outdoor air or return air is more suitable to au enthalp comparing enthalpy. If no enthalpy sensors are available, then enthalp return air humidit switching differential is fixed at 1.0 mA for enthalpy sensors, and 0.25 btu/lb for calculated enthalp

NOTE: If no return temperature sensor is confi

10. Network Enabled—

controls the enablin When using the network input, select Econo Enable T has priorit selections.

in btu/lb is compared to the enthalpy setpoint

ment mechanical cool ing.

sensors are configured, they are used for

space temperature is used to calculate return air enthalp

No Economizer

pe:

over the other nine economizer control

ment mechanical cooling. When

and temperature sensors. The

. the network input

and disabling of the economizer.

in E-Vision. The network input

when the outdoor

the difference between

the calculated outdoor

and return air

is calculated usi ng outdoor and

ured,

DestEconEnable

DISCHARGE AIR LOW LIMIT CONTROL

If the dischar discharge air low limit setpoint (DaTempLoLim), an alarm is issued, and the outdoor air damper is driven below the minimum position settin to the low limit. If necessary, the damper can go completely closed even durin dischar open until the minimum position setting is reached. At this point, the low limit alarm is cleared.

ECONOMIZER ENABLE/DISABLE CONTROL

The W7750 Controller has inputs to determine if the outdoor air is suitable to au can be enabled/disabled for usi n

e of cooling based on one of ten allowable strategies:

sta

1. Digital Input Enable/Disable—

economizer.

2. Outdoor Tem perature—

is less than OaEconEnTemp, then the outdoor air is suitable to au

3. Outdoor Enthalpy, Type A—

enthalp outdoor air is suitable to augment cooling.

4. Outdoor Enthalpy, Type B—

enthalp outdoor air is suitable to augment cooling.

5. Outdoor Enthalpy, Type C—

enthalp outdoor air is suitable to augment cooling.

e air temperature falls below the user-settable

until the discharge temperature is up

Occupied mode operation. As the

e temperature warms up, the economizer modulates

ment cooling. The economizer dampers

outdoor air as the first

contact closure enables

when the outdoor te mperat ure

ment cooling.

when the outdoor

meets the H205 type A requirements, the

when the outdoor

meets the H205 type B requirements, the

when the outdoor

meets the H205 type C requirements, the

Appendix C. Complete List of Excel 10 W7750 Controller User Addresses.

See Table 18 for W7750 Controller User Address table numbers and point t

User Address Index

The Addresses alphabetically and gives the page number where the Address is located in each Table Number/Point T

After Table 18 there is an alphabetical list of

Addresses and Table Numbers

alphabetical list of

Numbers

Table 20 Input/Output Table 21 Control Parameters Table 22 Ener Table 23 Status Points Table 24 Calibration Points Table 25 Confi Table 26 L Table 27 Direct Access and Special Manual Points Table 28 Data Share Points

Table 18. Excel 10 W7750 Controller User

Table Number Point Types

pes.

following Table 18 lists the User

pe.

Mappable User

Failure Detect User Addresses and Table

. Following this is an

Address Point T y pes .

Management Point s

uration Parameters

ONMARK

/Open System Points

74-2958—162

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

User Address Indexes (all in alphabetical order)

Table 20. Input Output Points. Address Page

CO2Sensr 71 CORMode 67 DaTempSensr 70 EconEnSw 72 FltrPressSensr 70 FltrPressSensr 70

OvrSw 72

Ia Model 72 ModelSw 73 MonitorSe nsr 71 MonitorSw 73 OaEnthSensr 70 OaHumSensr 70 OaTempSensr 70 OccSensr 72 OvrdSw 72 RaEnthSensr 70 RaHumSensr 70 RaTempSensr 70 RmTempSensr 70 RmtStptPot 70 SmokeMonSw 72 StatusAirFlow 72 StatusDO1 71 StatusDO2 71 StatusDO3 71 StatusDO4 71 StatusDO5 71 StatusDO6 71 StatusDO7 71 StatusDO8 71 StatusDI1 71 StatusDI2 71 StatusDI3 72 StatusDI4 72 TimeClkSw 72 WindowSw 73

Table 21. Control Parameters. Address Page

pTime 76

B DaTempClCtrlBd 77 DaTempEcCtrlBd 77 DaTempHiLim 73 DaTempHtCtrlBd 77 DaTempLoLim 73 DiffEconEnTemp 75 DlcBumpTemp 73 EconIAQPos 76 EconMinPos 76 FltrPressStPt 76 GainCoolDer 77 GainCoolInt 77 GainCoolProp 77 GainHeatDer 77 GainHeatInt 77 GainHeatProp 77 IAQSetpt 76 MaxClRamp 75 MinClRamp 75 MaxHtRamp 74 MinHtRamp 74

OaEconEnTemp 75 OaEnthEn 76 OaTempClLkOut 74 OaTempHtLkOut 73 OaTempMaxClRp 75 OaTempMinClRp 75 OaTempMaxHtRp 74 OaTempMinHtRp 74 PwmFullScale 76 PwmPeriod 76 PwmZeroScale 76 StptKnobHiLim 76 StptKnobLowLim 76

Table 22. Energy Management Points. Address Page

pass 78

DestB DestDlcShed 78 DestFree1 79 DestFree2 79 DestTimeClk 80 DestWSHPEnable 79 DestSchedOcc 78

pCt 78

SrcB SrcBypass 78 SrcTimeClk 80 SrcTimeClkCt 80 TodEventNext 78 Tuncos 78

Table 23. Status Points. Address Page

AlarmLo B CO2Sens 89 CoolPos 90 CoolSt DaSetpt 89 DaTemp 89 DlcShed 86 EconPos 90 FilterPress 89 Free1Stat 86 Free2Stat 86 HeatPos 90 HeatSt MonitorSens 90 MonitorSw 87 NetConfi OaEnth 89 OaEnthCalc 85 OaHum 89 OaTemp 89 OccStatOut 86 RaEnth 89 RaEnthCalc 85 RaHum 89 RaTemp 89 RmTemp 88 RmTempActSpt 88 SaFan 86 SaFanStatus 85 ShutDown 87 SrcEmer SrcTimeClk 80 StatFreezeStat 87 StatusAlmT

1 83

pTimer 88

sOn 86

p 81

63 74-2958—1

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

StatusEconEn 85 StatusEconOut 86 StatusError 90 StatusFilter 87 StatusIa StatusManOcc 85 StatusMode 84 StatusOcc 84 StatusOc StatusOvrd 84 StatusSched 84

StatusSmoke 87 StatusWndw 87 TimeClckOcc 84 WSHPEnable 88

Table 24. Calibration Points. Page 93

Table 25. Configuration Parameters. Address Page

CascCntrl 96 CoolC CoolMtrSpd 95 DisMinClTime 96 DisMinHtTime 96 EconMode 94 EconMtrSpd 95 FanFailTime 95 FanMode 94 FanOnHtMode 95 FanRunOnCool 94 FanRunOnHeat 94 HeatC HeatMtrSpd 95 Ia OvrdPriorit OvrdType 97 RmTempCal 95 SetPtKnob 97 SmkCtlMode 94 TempOffs tCal1 95 TempOffs tCal2 95 UseRaTempCtl 96 UseWallModStpt 97 VoltO ffstCal1 95 VoltO ffstCal2 95

Table 26. L Address Page

CoolOccSpt 98 CoolUnoccSpt 98 CoolStb DestEconEnable 104 DestEmer DestHvacMode 99 DestManOcc 99 DestOaHum 100 DestOaTemp 100 DestOccSensor 103 DestRmTemp 100 DestRmTempSpt 99 DestSptOffset 99 DestWndw 104 HeatOccSpt 98 HeatStb

Ovr 87

Sen 85

cHr 94

UseHeat 96

ONMARK

Spt 98

Cmd 101

Spt 98

/Open System Points.

HeatUnoccSpt 98 SrcEconEnable 105 SrcEconEnCt 105 SrcOaHum 100 SrcOaTemp 100 SrcOccSensor 103 SrcRmTemp 100 SrcRmTempActSpt 99 SrcUnitStatus 101 SrcWndw 104 SrcWndwCt 104

Ta ble 27. Direct Acce ss and Spec ial Man ual Points . Address Page

DestManMode 106 TestAuxEcon 107 TestAuxHt1 107 TestAuxHt2 107 TestAuxHt3 107 TestAuxHt4 107 TestEconPos 106 TestFree1 107 TestFree2 107 TestH CPos 106 TestHtClMode 107 TestHtClSt TestHtClSt TestHtClStg3 107 TestHtClSt TestMo de 106 TestOccStat 107 TestSaFan 107

Table 28. Data Share Points. Address Page

DestIa DestOaEnth 108 SrcIa SrcIa SrcMonSw 108 SrcMonSwCt 108 SrcOaEnth 108

1 107 2 107

4 107

Ovrd 108

Ovr 108 OvrCt 108

Mappable User Addresses and Table Number

User Address Table Number

pTime 21

pTimer 23 CascCntrl 25 CO2Sen 23 CoolCycHr 25 CoolMtrSpd 25 CoolOccSpt 26 CoolPos 23 CoolStbySpt 26 CoolStgsOn 23 CoolUnoccSpt 26 DaSetpt 23 DaTemp 23 DaTempClCtrlBd 21 DaTempEcCtrlBd 21 DaTempHiLim 21 DaTempHtCtrlBd 21 DaTempLoLim 21 DestDlcShed 22 DestEmer DestHvacMode 26 DestManMode 27 DestSchedOcc 22

Cmd 26

74-2958—164

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

DiffEconEnTemp 21 DisMinHtTime 25 DisMinClTime 25 DlcBumpTemp 21 EconIAQPos 21 EconMinPos 21 EconMtrSpd 25 EconPos 23 EconMode 25 FanFailTime 25 FanMode 25 FanOnHtMode 25 FanRunOnCool 25 FanRunOnHeat 25 FilterPress 23 FltrPressStPt 21 Free1Stat 23 Free2Stat 23 GainCoolDer 21 GainCoolInt 21 GainCoolProp 21 GainHeatDer 21 GainHeatInt 21 GainHeatProp 21 HeatCycHr 25 HeatMtrSpd 25 HeatOccSpt 26 HeatPos 23 HeatStbySpt 26 HeatStgsOn 23 HeatUnoccSpt 26 IAQSetpt 21 IaqUseHeat 25 MaxClRamp 21 MinClRamp 21 MaxHtRamp 21 MinHtRamp 21 MonitorSens 23 MonitorSw 23 OaEconEnTemp 21 OaEnth 23 OaEnthCalc 23 OaEnthEn 21 OaHum 23 OaTemp 23 OaTempClLkOut 21 OaTempHtLkOut 21 OaTempMaxCl Rp 21 OaTempMinClRp 21 OaTempMaxHtRp 21 OaTempMinHtRp 21 OccStatOut 23 OvrdPriority 25 OvrdType 25 PwmFullScale 21 PwmPeriod 21 PwmZeroScale 21 RaEnth 23

RaEnthCalc 23 RaHum 23 RaTemp 23 RmTempActSpt 23 RmTempCal 25 RmtStptPot 20 SaFan 23 SaFanStatus 23 SetPtKnob 25 ShutDown 23 SmkCtlMode 25 StatFreezeStat 23 StatusAlmT

p 23 StatusEconEn 23 StatusEconOut 23 StatusFilter 23 StatusIaqOvr 23 StatusManOcc 23 StatusMode 23 StatusOcc 23 StatusOcySen 23 StatusOvrd 23 StatusSched 23 StatusSmoke 23 StatusWndw 23 StptKnobHiLim 21 StptKnobLowLim 21 TimeClckOcc 23 UseRaTempCtl 25 UseWallModStpt 25

WSHPEnable 23

Failure Detect User Addresses and Table Number

User Address Table Number

DestB

pass 22 DestDlcShed 22 DestEconEnable 26 DestFree1 22 DestFree2 22 DestHvacMode 26 DestIa DestOaEnth 28 DestOaHum 26 DestOaTemp 26 DestOccSensor 26 DestRmTemp 26 DestSchedOcc 22 DestSptOffset 26 DestTimeClk 22 DestWndw 26 DestWSHPEnable 22

Table 19 lists the applicable En points found in the W7750.

Ovrd 28

ineering Units for the analog

Table 19. Engineering Units For Analog Points.

English Units (Inch-Pound) Standard International Units (SI)

Measured Item Description Abbreviation Description Abbreviation Temperature Relative T e mperature Relativ e Hu m i d ity Air Flow

Concent r a t i on

Enthalpy Differential Pressure

rees Fahrenheit F Degrees Celsius C Delta Degrees Fahrenheit DDF Degrees Kelvin K Percent % Percent % Cubic Feet per Minute CFM Meters Cubed per Hour m3h Parts Per Million PPM Parts Per Million PPM British Thermal Units per Pound of Air btu/lb kiloJoules/kilo

ram kj/k

Inches of Water Column inw kiloPascal kPa

65 74-2958—1

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

(M)

(P)

(S)

ging

(

)

(DA)

All of the NvName values that a re stored in EEPROM memo ry

nci

have a prefix of

NOTE: These parameters are stored in EEPROM and are

writes

limited to 10,000

. Do NOT use them as outputs from Control Strategies,Time Programs, or Switchin

Tables. If these points are changed more than 10,000 times, irreversible hardware failure results

Tables 20 through 28 provide point attributes as follows:

ineerin

En Units— This field indicates the point valid range and

displayed Engineering Unit. For digital points, the valid states and the correspondin enumerated values are shown.

Default— The value or state of the point on controller

start-up.

E-Vision

Monitor— These points are viewable within the E-Vision

Controller Monitorin

on-line screen.

Parameter—These points refer to control parameters

settable in the Application Selection dialog boxes in E-Vision.

Schematic—These points appear in E-Vision monitor

mode graphics.

Shareable— These points can be set up for data sharin

in Command Multiple Points, Read Multiple Points, or Refer Excel 10 Points as either a data source or a destination.

Mappable— These points can be converted into a C-Bus

point used b

C-Bus devices. A mappable point has a one-to-one relationship with a C-Bus User Address.

Direct Access— These points are accessibl e throu

stem Points mechanism in XBS.

Subs

h the

Hardware Config.— These are points that involve controller I/O

configuration. Any change to Hardware Config. points caus es the W7750 to perform an application reset; therefore, these points can

be modified off-line.

onl

Manual

.— These points are used to set the controller

Confi

outputs when in manual mode. The W7750 is placed in manual mode throu

h a menu selection in the E-Vision Controller Monitor screen.

Test— These points can be controlled in E-V isions te st

mode that is used for field checkout/ debu

Failure Detect Input Point— These points need an update periodicall

or a communication alarm is generated. The failure detect mechani sm is o nl bound

bindings are configured using Refer

active when the NV is

Excel 10 points). The time between the updates is user settable.

Non-Failure Detect Input Point— These points

unbound periodicall

which are NVs that are bound or

do not check for an update

and do not generate an alarm.

NOTES:

1. Mapped points can be viewed and chan

needed

, on the XI581, XI582 and XI584 C-Bus

ed, if

devices and on an XBS central and on E-Vision.

2. All Excel 10 points, mappable and calibration, uration and internal data sha ring points, can

confi be viewed and chan Access

mode in the XBS subsystem menu

as allowed

ed,

, via Direct

or via XI584.

74-2958—166

Table 20. Input/Output Points.

Value of State

Digital State or

E-Vision (M, P, S)

Hardware Config.

Direct Access

Manual Config.

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

User Address NvName Field Name

CORMode nciIoSelect CorOnMode COR_ON_HEAT

nciIoSelect ResistiveIn[0] DISCHARGE_TEMP_PT3000

nciIoSelect ResistiveIn[1] DISCHARGE_TEMP_PT3000

nciIoSelect VoltageIn[0] RTN_HUM_C7600C

67 74-2958—1

nciIoSelect VoltageIn[1] RTN_HUM_C7600C

nciIoSelect DigitalIn[0] OCC_SENSOR

Engineering Units: English

(Metric) or States plus Range

COR_ON_COOL

OUTDOOR_TEMP_PT3000 RETURN_TEMP_PT3000 DISCHARGE_TEMP_20KNTC RETURN_TEMP_20KNTC UNUSED_RAI

RETURN_ENTHALPY OD_HUM_C7600C OUTDOOR_ENTHALPY FILTER_STATIC_PRESS_DIFF SPACE_CO2 MONITOR_SENSOR1 RTN_HUM_C7600B OD_HUM_C7600B UNUSED_VAI

OCC_TIME_CLOCK PROOF_AIR_FLOW ECON_ENABLE IAQ_OVERRIDE SMOKE_MONITOR DIRTY_FILTER SHUT_DOWN WINDOW_OPEN MONITOR SCHED_MASTER UNUSED_DI

Map

Default

01COR_ON_COOL P X CorOnMode specifies the mode when the Change Over Relay (COR) is

UNUSED_RAI X ResistiveIn[0] specifies which logical sensor is assigned to each physical 1 2 3 4 255

UNUSED_RAI X ResistiveIn[1] specifies which logical sensor is assigned to each physical 1 2 3 4 255

UNUSED_VAI X VoltageIn[0] specifies which logical sensor is assigned to each physical

0 1 2 3 4 5 6 7 8 255

UNUSED_VAI X VoltageIn[1] specifies which logical sensor is assigned to each physical

0 1 2 3 4 5 6 7 8 255

OCC_TIME_CLOCK_IN X DigitalIn[0] specifies which logical switch type is connected to the flexible 3 4 5 6 7 8 9 10 11 12 255

Test

Comments

energized.

analog input sensor channel according to the enumerated list that is shown in the Engineering Units/States column. ResistiveIn[0] is the only input available in the W7750A controller.

analog input sensor channel according to the enumerated list that is shown in the Engineering Units/States column. (Voltage inputs are not available in the W7750A controller.)

digital inp ut swi tch chan nel ac cor din g t o th e en ume rat ed lis t t hat is sh own i n the Engineering Units/States column. DigitalIn[0] and DigitalIn[1] are the only inputs available in the W7750A controller. The controller is configured at the factory with this user address configured to OCC_TIME_CLOCK_IN.

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—168

Table 20. Input/Output Points. (Continued)

Digital State or

Value of State

E-Vision (M, P, S)

Direct Access

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

Hardware Config.

Manual Config.

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

User Address NvName Field Name

nciIoSelect DigitalIn[1] OCC_SENSOR

nciIoSelect DigitalIn[2] OCC_SENSOR

Engineering Units: English

(Metric) or States plus Range

OCC_TIME_CLOCK PROOF_AIR_FLOW ECON_ENABLE IAQ_OVERRIDE SMOKE_MONITOR DIRTY_FILTER SHUT_DOWN WINDOW_OPEN MONITORS CHED_MASTER UNUSED_DI

OCC_TIME_CLOCK PROOF_AIR_FLOW ECON_ENABLE IAQ_OVERRIDE SMOKE_MONITOR DIRTY_FILTER SHUT_DOWN WINDOW_OPEN MONITOR SCHED_MASTER UNUSED_DI

Map

Default

SHCED_MASTER_IN X DigitalIn[1] specifies which logical switch type is connected to the flexible 3 4 5 6 7 8 9 10 11 12 255

UNUSED_DI X DigitalIn[2] specifies which logical switch type is connected to the flexible 3 4 5 6 7 8 9 10 11 12 255

Test

Comments

Table 20. Input/Output Points. (Continued)

Digital State or

Value of State

E-Vision (M, P, S)

Hardware Config.

Direct Access

Manual Config.

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

User Address NvName Field Name

nciIoSelect DigitalOut[0] COOL_STAGE_1

69 74-2958—1

nciIoSelect DigitalOut[1] See DigitalOut [0] enu me rate d

nciIoSelect DigitalOut[2] See DigitalOut [0] enu me rate d

nciIoSelect DigitalOut[3] See DigitalOut [0] enu me rate d

nciIoSelect DigitalOut[4] See DigitalOut [0] enu me rate d

nciIoSelect DigitalOut[5] See DigitalOut [0] enu me rate d

nciIoSelect DigitalOut[6] See DigitalOut [0] enu me rate d

nciIoSelect DigitalOut[7] See DigitalOut [0] enu me rate d

nciIoSelect HtPump CONV

Engineering Units: English

(Metric) or States plus Range

COOL_STAGE_2 COOL_STAGE_3 COOL_STAGE_4 HEAT_STAGE_1 HEAT_STAGE_2 HEAT_STAGE_3 HEAT_STAGE_4 CHANGE_OVER_RELAY FAN_OUT AUX_ECON OCCUPANCY_STATUS ECON_OPEN ECON_CLOSE COOL_OPEN COOL_CLOSE HEAT_OPEN HEAT_CLOSE HEAT_COOL_STAGE_1 HEAT_COOL_STAGE_2 HEAT_COOL_STAGE_3 HEAT_COOL_STAGE_4 FREE1 FREE2 FREE1_PULSE_ON FREE1_PULSE_OFF ECON_PWM HEAT_PWM COOL_PWM UNUSED

values

Map

Default

NETWORK DO(FREE1) 2

(Value of State is 25) 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 25 26 27 28 29 30 31 255

1-31

FAN_OUT ,255

(Value of State is 10) 1-31

COOL_STAGE_2 ,255

(Value of State is 2) 1-31

HEAT_STAGE_1 ,255

(Value of State is 1) 1-31

HEAT_STAGE_2 ,255

(Value of State is 3) 1-31

HEAT_STAGE_1 ,255

(Value of State is 5) 1-31

UNUSED ,255

(Value of State is 255) 1-31

UNUSED ,255

(Value of State is 255) 01CONV P X HtPump specifies the type of equipment being controlled. When HtPump is

Test

Comments

X DigitalOut[0] specifies which logical digital output function is assigned to the

X See DigitalOut[0] for enumerated names. The W7750 Controllers are

digital physical output according to the enumerated list that is shown in the Engineering Units/States column. The W7750 Controllers are configured at the factory with the enumerated value in the Default column. Only DigitalOut[0] through DigitalOut[5] are available in the W7750A model which can configure staged outputs. The W7750A Controller can drive Series 60 Floating Control to modulate cooling valves, heating valves and economizers. (No PWM outputs are allowed in the W7750A model.) The controller is configured at the factory with the enumerated value in the Default column. The eight outputs on the W7750B are all digital outputs. The eight outputs on the W7750C consist of five digital and three analog outputs.

configured at the factory with the enumerated value in the Default column.

0 (CONV), the node is controlling conventional gas or electric heat. When HtPump is 1 (HP), the node is controlling a heat pump.

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—170

Table 20. Input/Output Points. (Continued)

Digital State or

Value of State

E-Vision (M, P, S)

Direct Access

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

Hardware Config.

Manual Config.

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

User Address NvName Field Name

nciIoSelect FiftySixtyHz SIXTYFIFTY 01 SIXTY P X FiftySixtyHz specifies the frequency of the main power input for the

nciIoSelect SpaceSensorType T7770 0 T7770 X SpaceSensorType specifies the type of space temperature sensor

RmtStptPot nvoIO siSetPointTempS7 Degrees F

RmTempSensr nvoIO siSpaceTempS7 Degrees F

DaTempSensr nvoIO siDischargeTempS7 Degrees F Degrees C

RaTempSensr nvoIO siReturnTempS7 Degrees F Degrees C

RaHumSensr nvoIO ReturnHumidity Percentage

RaEnthSensr nvoIO siReturnEnthalpyS7 mA

OaTempSensr nvoIO siOutdoorTempS7 Degrees F Degrees C

OaHumSensr nvoIO OutdoorHumidity Percentage

OaEnthSensr nvoIO siOutdoorEnthalpyS7 mA

FltrPressSensr nvoIO siFilterPressureS10 inw (kPa)

Engineering Units: English

(Metric) or States plus Range

-9 to 85 Degrees C (-23 to 29)

40 to 100 Degrees C (4 to 38)

30 to 122 (-1 to 50)

10 to 90

4 to 20

-40 to 122 (-40 to 50)

10 to 90

4 to 20

0 to 5 (0 to 1.25)

Map

Default

SI_INVALID M, SX X X SetPointTemp is the wall module setpoint temperature. When

SI_INVALID M,

SI_INVALID DischargeTemp is the measured discharge air temperature. If the sensor is

SI_INVALID ReturnTemp is the measured return air temperature. If the sensor is not

SI_INVALID ReturnHumidity is the measured return air humidity. If the sensor is not

SI_INVALID ReturnEnthalpy is the measured return air enthalpy. If the sensor is not

SI_INVALID M,

SI_INVALID FilterPressure is the measured differential pressure across the return air

Test

Comments

controller. Correctly selecting the FiftySixtyHz decreases the noise picked up by analog switch wiring from the power mains. When FiftySixtyHz is 0 (SIXTY is the default), the mains frequency is sixty Hz and when FiftySixtyHz is 1 (FIFTY), the mains frequency is fifty Hz.

connected to the node. When SpaceSensorType is 0, a T7770 sensor is connected to the sensor terminals. No other options are currently valid.

nciConfig.SetPointTemp is ABSOLUTE_COOL or ABSOLUTE_MIDDLE, the reported value is the absolute setpoint temperature. When Config.SetPntKnob is OFFSET, the reported value is the offset (from the current active TempSetPts) temperature. If the input is not configured or has failed, the value is SI_INVALID.

SpaceTemp is the measured space temperature. If the sensor is not configured or has failed, the value is SI_INVALID.NOTE: The reported temperatures includes the offset corr ect ion pro vide d by Config.ResistiveOffsetCal.

not configured or has failed, the value is SI_INVALID. Refer to the note on SpaceTemp.

configured or has failed, the value is SI_INVALID. Refer to the note on SpaceTemp.

configured or has failed, the value is UB_INVALID.NOTE: The reported temperatures includes the offset corr ect ion pro vide d by Config.VoltageOffsetCal.

configured or has failed, the value is SI_INVALID. Since the C7400 reports comfort due to enthalpy (btu/lb) in milliamps, enthalpy is also reported in milliamps. Refer to the NOTE on ReturnHumidity.

OutdoorTemp is the measured outdoor air temperature. If the sensor is not configured or has failed, the value is SI_INVALID. Refer to the NOTE on ReturnHumidity.

OutdoorHumidity is the measured outdoor air humidity. If the sensor is not configured or has failed, the value is UB_INVALID. Refer to the NOTE on ReturnHumidity.

OutdoorEnthalpy is the measured outdoor air enthalpy. If the sensor is not configured or has failed, the value is SI_INVALID. Since the C7400 reports comfort due to enthalpy (btu/lb) in milliamps, enthalpy is also reported in milliamps. Refer to the NOTE on ReturnHumidity.

filter. If the sensor is not configured or has failed, the value is the SI_INVALID. Refer to the NOTE on ReturnHumidity.

Table 20. Input/Output Points. (Continued)

Digital State or

Value of State

E-Vision (M, P, S)

Hardware Config.

Direct Access

Manual Config.

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

User Address NvName Field Name

CO2Sensr nvoIO siSpaceCo2S0 PPM

MonitorSensr nvoIO siMonitorS10 volts

StatusDO1 nvoIO ubOut

StatusDO2 nvoIO ubOut

StatusDO3 nvoIO ubOut

71 74-2958—1

StatusDO4 nvoIO ubOut

StatusDO5 nvoIO ubOut

StatusDO6 nvoIO ubOut

StatusDO7 nvoIO ubOut

StatusDO8 nvoIO ubOut

StatusDI1 nvoIO ubDigitalIn

StatusDI2 nvoIO ubDigitalIn

Byte Offset = 24 Bit Offset = 0(DigitalOut1)

Byte Offset = 24 Bit Offset = 1(DigitalOut2)

Byte Offset = 24 Bit Offset = 2(DigitalOut3)

Byte Offset = 24 Bit Offset = 3(DigitalOut4)

Byte Offset = 24 Bit Offset = 4(DigitalOut5)

Byte Offset = 24 Bit Offset = 5(DigitalOut6)

Byte Offset = 24 Bit Offset = 6(DigitalOut7)

Byte Offset = 24 Bit Offset = 7(DigitalOut8)

Byte Offset = 25 Bit Offset = 7(DigitalIn1)

Byte Offset = 25 Bit Offset = 6(DigitalIn2)

Engineering Units: English

(Metric) or States plus Range

150 to 2000

1 to 10

FALSE TRUE

Map

Default

SI_INVALID SpaceCo2 is the measured CO2 in the conditioned air space. If the sensor

SI_INVALID Monitor is the voltage applied at the monitor inputs terminals. If the sensor

01FALSE DigitalOut1 is a byte with a bit for every physical digital output. On is a 1

01FALSE DigitalOut2 is a byte with a bit for every physical digital output. On is a 1

01FALSE DigitalOut3 is a byte with a bit for every physical digital output. On is a 1

01FALSE DigitalOut4 is a byte with a bit for every physical digital output. On is a 1

01FALSE DigitalOut5 is a byte with a bit for every physical digital output. On is a 1

01FALSE DigitalOut6 is a byte with a bit for every physical digital output. On is a 1

01FALSE DigitalOut7 is a byte with a bit for every physical digital output. On is a 1

01FALSE DigitalOut8 is a byte with a bit for every physical digital output. On is a 1

01FALSE DigitalIn1 is a byte with a bit for every physical digital input. If the input is

01FALSE DigitalIn2 is a byte with a bit for every physical digital input. If the input is

Test

Comments

is not configured or has failed, the value is SI_INVALID. Refer to the NOTE on ReturnHumidity.

(TRUE) and off is a 0 (FALSE).

shorted to ground, the bit is a zero or FALSE. If the input is open, the bit is one or TRUE.

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—172

Table 20. Input/Output Points. (Continued)

Digital State or

Value of State

E-Vision (M, P, S)

Direct Access

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

Hardware Config.

Manual Config.

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

User Address NvName Field Name

StatusDI3 nvoIO ubDigitalIn

StatusDI4 nvoIO ubDigitalIn

Model nvoIO ubDigitalIn

OvrdSw nvoIO OverRide FALSE

OccSensr nvoIO OccupancySensor FALSE

TimeClkSw nvoIO OccTimeClock FALSE

StatusAirFlow nvoIO ProofAirFlow FALSE

EconEnSw nvoIO EconEnableIn FALSE

IaqOvrSw nvoIO IaqOverRide FALSE

SmokeMonSw nvoIO SmokeMonitor FALSE

DrtyFilterSw nvoIO DirtyFilter FALSE

ShutDownSw nvoIO ShutDown FALSE

Byte Offset = 25 Bit Offset = 5(DigitalIn3)

Byte Offset = 25 Bit Offset = 4(DigitalIn4)

Byte Offset = 25 Bit Offset = 3 (ExtenedModelIn)

Engineering Units: English

(Metric) or States plus Range

FALSE TRUE

TRUE

Map

Default

01FALSE DigitalIn3 is a byte with a bit for every physical digital input. If the input is

01FALSE DigitalIn4 is a byte with a bit for every physical digital input. If the input is

01FALSE X ExtenedModelIn is a byte with a bit for every physical digital input. If the

01FALSE OverRide indicates the status of the wall module override pushbutton. It is 1

01FALSE M,

01FALSE ProofAirFlow is the state of the digital input configured and wired to the

01FALSE M,

01FALSE ShutDown is the state of the digital input configured and wired to the shut

Test

Comments

shorted to ground, the bit is a zero or FALSE. If the input is open, the bit is one or TRUE.

input is shorted to ground, the bit is a zero or FALSE. If the input is open, the bit is one or TRUE.

(TRUE) if the button is pressed, and is 0 (FALSE) if it isn't pressed. OccupancySensor is the state of the digital input configured and wired to

the local occupancy sensor. 1 means that occupancy is being sensed (input circuit shorted) and 0 means that no occupa nc y is being sen sed (input circuit open).

OccTimeClock is the state of the digital input configured and wired to a time clock. 1 (input shorted) means that the scheduled occupancy is OC_OCCUPIED, and 0 (input open circuited) means that the scheduled occupancy is OC_UNOCCUPIED.

proof of air flow switch. 1 (input shorted) means that air flow is detected and 0 (input open circuited) means that air flow is not detected.

EconEnableIn is the state of the digital input configured and wired to the outdoor air sensor that determines the suitably of outdoor air for free cooling. 1 (input shorted) means that the outdoor air is suitable for cooling, and 0 (input open) means that the outdoor air in not suitable for cooling.

IaqOverRide is the state of the digital input configured and wired to the indoor air quality sensor. 1 (input shorted) means that the indoor air quality is poor, and 0 (input open) means that the indoor air quality is acceptable. This input is used to cause th e economizer to open to a predetermined position when poor indoor air quality is dete cte d.

SmokeMonitor is the state of the digital input configured and wired to the indoor smoke sensor. 1 (input shorted) means that smoke is detected, and 0 (input open) means that no smoke is detected.

DirtyFilter is the state of the digital input configured and wired to the dirty filter sensor. 1 (input shorted) means that filter is dirty, and 0 (input open) means that the filter is not dirty.

down switch. 1 (input shorted) means that equipment should be shut down, and 0 (input open) means that t he equipment should be running.

Table 20. Input/Output Points. (Continued)

Digital State or

Value of State

E-Vision (M, P, S)

Hardware Config.

Direct Access

Manual Config.

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

User Address NvName Field Name

WindowSw nvoIO WindowOpen FALSE

MonitorSw nvoIO MonSwitch FALSE

ModelSw nvoIO Model FALSE

nvoIO SchedMaster FALSE

73 74-2958—1

User Address NvName Field Name

DaTempLoLim nciAux1SetPt siLowLimitDischAirTempS7 Degrees F

DaTempHiLim nciAux1SetPt siMaxDisAirTempHeatS7 Degrees F Degrees C

DlcBumpTemp nciAux1SetPt siDlcBumpTempS7 Degrees F Degrees C

OaTempHtLkOut nciAux1SetPt ubOdHtLockOutTempS0 Degrees F Degrees C

Engineering Units: English

(Metric) or States plus Range

TRUE

Engineering Units: English

(Metric) or States plus Range

0 to 60 Degrees C (-1 to 16)

65 to 135 (18 to 57)

0 to +10 (-18 to -12)

0 to 90 (-18 to 32)

Map

Default

01FALSE M,

01FALS E Mon S wi t ch is t h e s t at e of t he di g it al i np u t c o nf i g ur e d a nd wi r e d t o a ge n er a l

01FALSE X Model indicates the Model of the node. One of the digital inputs is

01FALSE M X If ScheduleMaster is 1 (input shorted), the node is the schedule master and

T able 21. Control Parameters.

Digital State or

Value of State

E-Vision (M, P, S)

Default

45 P X X When the discharge air temperature falls below

100 P X X When the mode is HEAT, and the CascadeControl is enabled, the

3 P X X When DlcShed is not 0 then the setpoint is shifted by DlcBumpTemp

70 P X X When the outdoor air temperature is greater than

Map

Test

Comments

WindowOpen is the state of the digital input configured and wired to a window open sensor switch. 1 (input open circuit) means that the window is open, and 0 (input shorted) means that the window is closed.

purpose monitor switch. 1 (input shorted) means that switch is closed, and 0 (input open) means that the switch is open.

connected to a printed wiring board trace to let the embedded software know what kind of hardware is present. If Model is 1 (input held high), the hardware is the W7750B Model. If Model is 0 (input shor ted to ground), the hardware is the W7750A Model.

the locally connected time clock will be sent via TimeClk to other nodes on the network. If ScheduleMaster is 0, (input open), the node is not a schedule master and nvoTimeClk will not be sent on the network even if the time clock input is configured. If the ScheduleMaster input is not configured by Select, TimeClk reports the state of the locally connected time clock.

Hardware Config.

Manual Config.

Direct Access

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

Test

Comments

LowLimitDischAirTemp, the outdoor air dampers are closed to a position that corrects the low temperature problem. If mechanical cooling is active when the discharge air falls below LowLimitDischAirTemp, the mechanical cooling cycles off after the minimum run times are obeyed to allow the dampers to return open and provide free cooling.

discharge air temperature is controlled to a value not to exceed MaxDisAirTempHeat.

in the energy saving direction. When DlcShed changes from 1 to 0, the setpoint shift ramps back to 0 over a 30 minute interval.

OdHtLockOutTemp, the heating is disabled.

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—174

Table 2 1 . Cont r ol Parameters. (Continued)

Digital State or

Value of State

E-Vision (M, P, S)

Direct Access

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

Hardware Config.

Manual Config.

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

User Address NvName Field Name

MaxHtRamp nciAux1SetPt ubMaxHtRampS0 Degrees F/Hr

MinHtRamp nciAux1SetPt ubMinHtRampS0 Degrees F/Hr

OaTempMaxHtRp nciAux1SetPt ubOdTempMaxHtRampS0 Degrees F

OaTempMinHtRp nciAux1SetPt ubOdTempMinHtRampS0 Degrees F

OaTempClLkOut nciAux1SetPt ubOdClLockOutTempS0 Degrees F Degrees C

Engineering Units: English

(Metric) or States plus Range

0 to 20 Degrees C/Hr (0 to 11)

0 to 100 Degrees C (-18 to 38)

0 to 90 (-18 to 32)

Map

Default

8 P X X MaxHtRamp is the maximum heat recovery ramp rate in degrees F

3 P X X MinHtRamp is the minimum heat recovery ramp rate in degrees F

40 P X X OdTempMaxHtRamp is the maximum outdoor air temperature

0 P X X OdTempMinHtRamp is the minimum outdoor air temperature

50 P X X When the outdoor air temperature is less than OdClLockOutTemp,

Test

Comments

per hour. This value is used to control the adaptive recovery ramp rate during the HEAT recovery period. The setpoint is changed at a rate in degrees F per hour depending on the outdoor air temperature and the MinHt Ramp, Od T em pMaxHtRam p, and OaTempMinHtRamp parameters. If there is no outdoor air temperature sensor available, then ubMinHtRamp is used as the recovery rate.NOTE: Recovery ramping applies between scheduled heating or cooling setpoint changes from OC_UNOCCUPIED to OC_STANDBY, OC_UNOCCUPIED to OC_OCCUPIED, and OC_STANDBY to OC_OCCUPIED. Scheduled setpoint changes from OC_OCCUPIED to OC_UNOCCUPIED or OC_OCCUPIED to OC_STANDBY do not use a ramped setpoint but instead use a step change in setpoint. Recovery ramps begin before the next sche dul ed occ upa ncy time and are ramped from the setpoint for the existing scheduled occupancy state to the setpoint for the next occupancy state.

parameter that is used to calculate the heat recovery ramp rate setpoint. This value is used to control the adaptive recovery ramp rate during the HEAT recovery period. The setpoint is changed at a rate in degrees F per hour depending on the outdoor air temperature and the MaxHtRamp, MinHtRamp, and OdTempMinHtRamp parameters. If there is no outdoor air temperature sensor available, then MinHtRamp is used as the recovery rate. Refer to the NOTE in the comments column for MaxHtRamp for what conditions that recovery ramping applies to.

parameter that is used to calculate the heat recovery ramp rate setpoint. This value is used to control the adaptive recovery ramp rate during the HEAT recovery period. The setpoint is changed at a rate in degrees F per hour depending on the outdoor air temperature and the MaxHtRamp, MinHtRamp, and OdTempMaxHtRamp parameters. If there is no outdoor air temperature sensor available, then MinHtRamp is used as the recovery rate. Refer to the NOTE in the comments column for MaxHtRamp for what conditions that recovery ramping applies to.

the cooling is disabled.

Table 2 1 . Cont r ol Parameters. (Continued)

Digital State or

Value of State

E-Vision (M, P, S)

Hardware Config.

Direct Access

Manual Config.

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

User Address NvName Field Name

MaxClRamp nciAux1SetPt ubMaxClRampS0 Degrees F/Hr

MinClRamp nciAux1SetPt ubMinClRampS0 Degrees F/Hr

75 74-2958—1

OaTempMaxClRp nciAux1SetPt ubOdTempMaxClRampS0 Degrees F

OaTempMinClRp nciAux1SetPt ubOdTempMinClRampS0 Degrees F

OaEconEnTemp nciAux1SetPt ubOdEconEnableTempS0 Degrees F

DiffEconEnTemp nciAux1SetPt ubDiffEconEnableTempS0 Degrees F Degrees C

Engineering Units: English

(Metric) or States plus Range

0 to 20 Degrees C/Hr (0 to 11)

0 to 100 Degrees C (-18 to 38)

0 to 90 Degrees C (-18 to 32)

0 to 90 (-18 to 32)

Map

Default

6 P X X MaxClRamp is the maximum cool recovery ramp rate in degrees F

2 P X X MinClRamp is the minimum cool recovery ramp rate in degrees F

70 P X X OdTempMaxClRamp is the maximum outdoor air temperature

90 P X X OdTempMinClRamp is the minimum outdoor air temperature

70 P X X If Config.EconEnable is OD_TEMP, and the outdoor temperature is

4 P X X If Config.EconEnable is DIFF_TEMP, and return air temperature

Test

Comments

per hour. This value is used to control the adaptive recovery ramp rate during the COOL recovery period. The setpoint is changed at a rate in degrees F per hour depending on the outdoor air temperature and the MinClRamp, OdTempMaxClRamp, and OdTempMinClRamp parameters. If there is no outdoor air temperature sensor available, then MinClRamp is used as the recovery rate. Refer to the NOTE in the comments column for MaxHtRamp for the conditions that recovery ramping applies to.

per hour. This value is used to control the adaptive recovery ramp rate during the COOL recovery period. The setpoint is changed at a rate in degrees F per hour depending on the outdoor air temperature and the MaxClRamp, OdTempMaxClRamp, and OdTempMinClRamp parameters. If there is no outdoor air temperature sensor available, then MinClRamp is used as the recovery rate. Refer to the NOTE in the comments column for MaxHtRamp for the conditions that recovery ramping applies to.

parameter that is used to calculate the cool recovery ramp rate setpoint. This value is used to control the adaptive recovery ramp rate during the COOL recovery period. The setpoint is changed at a rate in degrees F per hour depending on the outdoor air temperature and the MaxClRamp, MinClRamp, and OdTempMinClRamp parameters. If there is no outdoor air temperature sensor available, then MinClRamp is used as the recovery rate. Refer to the NOTE in the comments column for MaxHtRamp for the conditions that recovery ramping applies to.

parameter that is used to calculate the cool recovery ramp rate setpoint. This value is used to control the adaptive recovery ramp rate during the COOL recovery period. The setpoint is changed at a rate in degrees F per hour depending on the outdoor air temperature and the MaxClRamp, MinClRamp, and OdTempMaxClRamp parameters. If there is no outdoor air temperature sensor available, then MinClRamp is used as the recovery rate. Refer to the NOTE in the comments column for MaxHtRamp for the conditions that recovery ramping applies to.

less than OdE c on En a ble Temp, then outdoor air i s j u dg ed s ui t ab l e to augment mechanical cooling. If Config.EconEnable is SINGLE_ENTH and outdoor temperate is less than ubOdEconEnableTemp (high limit), then outdoor air may be judged suitable to augment mechanical cooling depending on the relationship between calculated outdoor enthalpy and OdEnthalpyEnable.

minus outdoor air temperatu re is greater than DiffEconEnableTemp, then outdoor air is judged suitable to augment mechanical cooling.

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—176

Table 2 1 . Cont r ol Parameters. (Continued)

Digital State or

Value of State

E-Vision (M, P, S)

Direct Access

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

Hardware Config.

Manual Config.

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

User Address NvName Field Name

OaEnthEn nciAux1SetPt ubOdEnthalpyEnableS2 btu/lb

EconMinPos nciAux1SetPt ubEconMinPosS0 Percentage

EconIAQPos nciAux1SetPt ubEconIaqPosS0 Percentage

IAQSetpt nciAux1SetPt siCO2IaqLimitS0 PPM

PwmPeriod nciAux1SetPt siPwmPeriodS4 100 P X X When pulse width modulation is used, the period of one pulse width

PwmZeroScale nciAux1SetPt siPwm0pcntS4 Seconds

PwmFullScale nciAux1SetPt siPwm100pcntS4 Seconds

BypTime nciAux2SetPt uiBypassTime minutes

FltrPressStPt nciAux2SetPt ubFilterPressStPtS5 inw (kPa)

StptKnobLowLim nciAux2SetPt siLowStPtS7 Degrees F

StptKnobHiLim nciAux2SetPt siHighStPtS7 Degrees F

Engineering Units: English

(Metric) or States plus Range

0 to 65

0 to 100

0 to 2000

0 to 2047

0 to 1080

0 to 5 (0 to 1.25)

-9 to 90 Degrees C (-23 to 32)

Default

25 P X X If Config.EconEnable is SINGLE_ENTH, and calculated outdoor

0 P X X The minimum allowed position of the economizer damper for HEAT

80 P X X The control overrides the economizer damper to EconIaqPos when

800 P X X When an analog CO2 sensor is configured and the sensed CO2 is

1 P X X When pulse width modulation is used, the period of a pulse for zero

99 P X X When pulse width modulation is used, the period of a pulse for full

180 P X X uiBypassTime is the time between the pressing of the override

0.5 P X X If a filter pressure sensor is configured by IoSelect and the filter

55 P X X LowStPt is the lowest value reported for the setpoint knob.

85 P X X HighStPt is the highest value reported for the setpoint knob.

Map

Test

Comments

enthalpy is less than OdEnthalpyEnable, and outdoor temperature is less than OdE c on En a ble Temp, then outdoor air i s j u dg ed s ui t ab l e to augment mechanical cooling.

and COOL is EconMinPos.

poor indoor air quality is detected.

greater than CO2IaqLimit, then poor indoor air quality is detected and Data1.OverRide is set to 1. When the sensed CO2 is less than CO2IaqLimit, then the indoor air quality is considered acceptable and Data1.IaqOverRide is set to 0. oData1.IaqOverRide is used to set the economizer damper to Aux1SetPt. EconIaqPos and to possibly turn on the heat according to the state of Config.IaqUseHeat.

modulation cycle is PwmPeriod seconds. The smallest resolution is

0.1 seconds.

percent output (damper or valve at open position) is Pwm0pcntS4 seconds. The smallest resolut ion is 0.1 seco nd s.

scale output (damper or valve at open position) is Pwm100pcnt seconds. The smallest resolut ion is 0.1 seco nd s.

button at the wall module (or initiating OC_BYPASS via ManOcc) and the return to the original occupancy state. When the bypass state has been activated, the bypass timer is set to BypassTime.

pressure reported in Data1 FilterPressure exceeds FilterPressStPt, then a DIRTY_FILTER alarm is generated and Data1.DirtyFilter is set to 1.

Dependent on the configuration of the setpoint knob (see Config.SetPntKnob) this setting is either absolute [degree Fahrenheit (50 to 90)] in case of absolute setpoint knob configuration or relative [delta degree Fahrenheit (-9 to +9)] in case of relative setpoint knob configuration.

Table 2 1 . Cont r ol Parameters. (Continued)

Digital State or

Value of State

E-Vision (M, P, S)

Hardware Config.

Direct Access

Manual Config.

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

User Address NvName Field Name

GainCoolProp nciAux2SetPt ubKpCoolS2 Degrees F Degrees C

GainHeatProp nciAux2SetPt ubKpHeatS2 Degrees F Degrees C

GainCoolInt nciAux2SetPt siKiCoolS0 Seconds

GainHeatInt nciAux2SetPt siKiHeatS0 Seconds

GainCoolDer nciAux2SetPt siKdCoolS0 Seconds

GainHeatDer nciAux2SetPt siKdHeatS0 Seconds

DaTempClCtrlBd nciAux2SetPt ubDisCbCoolS0 Degrees F Degrees C

DaTempHtCtrlBd nciAux2SetPt ubDisCbHeatS0 Degrees F Degrees C

77 74-2958—1

DaTempEcCtrlBd nciAux2SetPt ubDisCbEconS0 Degrees F Degrees C

Engineering Units: English

(Metric) or States plus Range

2 to 30 (1 to 30)

2 to 30 (1 to 17)

0 to 5000

0 to 9000

5 to 30 (3 to 17)

5 to 30 (3 to 17

Map

Default

5 P X X This is the throttling range for the proportional portion of the PID loop

2050 P X X This is the integral portion of the PID loop gain for the cooling control

2050 P X X This is the integral portion of the PID loop gain for the heating control

0 P X X This is the derivative portion of the PID loop gain for the cooling

0 P X X This is the derivative portion of the PID loop gain for the heating

10 P X X DisCbCool is the throttling range used for the cooling portion of the

10 P X X DisCbHeat is the throttling range used for the heating portion of the

10 P X X DisCbEcon is the throttling range used for the economizer control

Test

Comments

gain for the cooling control loop.

gain for the heating control loop.

loop.

control loop.

discharge air temperature cascade control loop.

loop.

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—178

Table 22. Energy Management Points.

Value of State

Digital State or

E-Vision (M, P, S)

User Address NvName Field Name

DestDlcShed nviDlcShed 0 to 1 0 M X X X X X DlcShed is an input from an energy management system. When DlcShed is

DestSchedOcc nviTodEvent CurrentState OC_OCCUPIED

TodEventNext nviTodEvent NextState OC_OCCUPIED

Tuncos nviT odEvent uiTimeToNextState minutes

nviBypass value 0 to 100 0 Bypass.value:The bypass state of one node may be shared with the bypass

DestBypass nviBypass state SW_OFF

SrcBypCt nvoBypass value 0 to 100 0 nvoBypass.value:nvoBypass is the current occupancy state of the node for

SrcBypass nvoBypass state SW_OFF

Engineering Units: Englis h

(Metric) or States plus Range

OC_UNOCCUPIED OC_BYPASS OC_STANDBY OC_NUL

0 to 2880

SW_ON SW_NUL

Default

OC_OCCUPIED M X X X X X CurrentState indicates the current scheduled occupancy state to the node. 1 2 3 255

OC_OCCUPIED M X X NextState indicates the next scheduled occupancy state to the node. This 1 2 3 255

0 M X X TimeToNextState is the time in minutes until the next change of scheduled

SW_NUL M X X X X Refer to nviB ypa ss. valu e. 1 255

SW_NUL M X X Refer to nvoBypass.value. 1 255

Map

Hardware Config.

Direct Access

Manual Config.

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

Failure Detect

Comments

0, the temperature control algorith m ope rate s in a normal mode. When DlcShed is non-zero, the setpoint is shifted by Aux1SetPt.DlcBumpTemp in the energy saving direction.

CurrentState is used along with other occupancy inputs to calculate the effective occupancy of the node. The valid states and meaning are as follows: OC_OCCUPIED means the energy management system is specifying occupied. OC_UNOCCUPIED means the energy management system is specifying that the space is presently unoccupied. OC_BYPASS states that the energy management system is in bypass. OC_STANDBY states that the energy management system has the space presently is between occupied and unoccupied. OC_NUL states that no occupancy state has been specified.

information is required by the Excel 10 to perform the optimum start strategy. The space expected effective occupancy will be NextState in uiTime ToNextState minutes . Th e v ali d st at e s a nd me an i ng ar e the s am e as for CurrentState.

occupancy state.

state of another node using nviBypass and nvoBypass. This allows a wall module at one node to be used to over ride the scheduled occupancy of another node. The node with Bypass bound normally does not have a wall module. See the Data1.EffectOcc and Data1.OverRide for more details. The valid states are as follo ws: If the state is SW_ON and the value is not zero then the node should bypass the time of day schedule (subject to occupancy arbitration logic). If the state is SW_NUL, the input is not available because it is not bound, the input is no longer being updated by the sender, or OC_BYPASS is no longer being called. This means that the same as SW_OFF. If the state is SW_OFF or other and the value is don’t care, the node should not bypass the time of day schedule. If the state is SW_ON and the value is 0, then the node should not bypass the time of day schedule. If the node receives this combination of state and value, then state is set to SW_OFF.

bypass schedule. The states have the following meanings: If the state is SW_OFF and the value is 0, then Data1.EffectOcc is not OC_BYPASS. If the state is SW_ON and the value is 100 percent, then Data1.EffectOcc is OC_BYPASS.

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

User Address NvName Field Name

nviFree1 value 0 to 100 0 Free1.value network variable controls the spare or Free digital output for

DestFree1 nviFree1 state SW_OFF

79 74-2958—1

DestFree2 nviFree2 state SW_OFF

DestWSHPEnable nviWSHPEnable state SW_OFF

nviFree2 value 0 to 100 0 Free2.value behaves the same as Free 1 value.

nviWSHPEnable value 0 to 100 0 WSHPEnable.value is used to enable the compressor stages in heat pump

Table 22. Energy Management Points. (Continued)

Engineering Units: Englis h

(Metric) or States plus Range

SW_ON SW_NUL

Map

Hardware Config.

Direct Access

Manual Config.

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

Failure Detect

auxiliary functions. nviFree1 controls the FREE1_OUT, FREE1_OUT_PULSE_ON, and FREE1_OUT_PULSE_OFF outputs (only one of these DO selections per controller is allowed). The states have the following meaning: If the state is SW_OFF, the corresponding free logical output (and therefore the physical output, if configured) is off. If the state is SW_ON and the value is 0, then the corresponding free logical output (and therefore the physical output, if configured) is off. If the node receives this combination of state and value, then state is set to SW_OFF. If the state is SW_ON and the value is not zero, then the corresponding free logical output (and therefore the physical output, if configured) is on. If the state is SW_NUL or other, then the network variable is not bound, the communications path from the sending node has failed, or the sending node has failed. The corresponding free logical output does not change if the network variable input fails.

applicat i on s . Typically nvi W SH PE na b l e is bo un d t o a wa t er f l ow s en sor t ha t detects heating/cooling water supplied to the heat pump. If there is no water flowing the compressor is disabled. If the state is SW_OFF, the compressor is disabled in heat pump applications. If the state is SW_ON and the value is 0, the compressor is disabled in heat pump applications. If the node receives this combination of state and value, then state is set to SW_OFF. If the state i s SW _O N an d th e va lue is no t zer o , th e co mp r es s or is en a bl e d i n heat pump applications. If the state is SW_NUL or other, the network variable is not bound and is ignored.

Digital State or

Value of State

E-Vision (M, P, S)

Default

SW_NUL M X X X X Refer to Free 1.v alue . 1 255

SW_NUL M X X X X Refer to Free 2.v alue . 1 255

SW_NUL X Refer to WSH PE nab le. valu e. 1 255

Comments

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—180

User Address NvName Field Name

nviTimeClk value 0 to 100 0 nviTimeClk.value:nviTimeClk allows a time clock at one node to be shared

DestTimeClk nviTimeClk state SW_OFF

SrcTimeClkCt nvoTimeClk value 0 to 100 0 nvoTimeClk reports the current state of the physical time clock input. The

SrcTimeClk nvoTimeClk state SW_OFF

Engineering Units: Englis h

(Metric) or States plus Range

SW_ON SW_NUL

Table 22. Energy Management Points. (Continued)

Digital State or

Value of State

E-Vision (M, P, S)

Default

SW_NUL X Refer to nviTimeC lk.v alu e. 1 255

SW_NUL Refer to nvoTimeClk.value. 1 255

Hardware Config.

Direct Access

Map

Manual Config.

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

Failure Detect

Comments

with other nodes over the network. nviTimeClk is ORed with the local time clock sensor and the results are placed in Data1.OccTimeClock. TimeClk is received from another node and may have the following values: If the state is SW_OFF, the space is scheduled to be unoccupied. If the state is SW_ON and the value is 0, the space is scheduled to be unoccupied. If the node receives this combination of state and value, then state is set to SW_OFF. If the state is SW_ON and the value is not zero, the space is scheduled to be occupied. If the state is SW_NUL or other and the value is don’t care, the network variable is not bound and is ignored.

output values have the following meanings: If the state is SW_OFF and the value is 0, the time clock input is configured and the input is open circuit. If SCHEDULE_MASTER_IN is configured, then the schedule master input must be shorted to ground to reach this state. If the state is SW_ON and the value is 100 precent, the time clock input is configured and the input is a closed circuit. If SCHEDULE_MASTER_IN is configured, then the schedule master input must be shorted to ground to reach this state. If the state is SW_NUL and the value is 0, the time clock input is not configured by Select or the SCHEDULE_MASTER_IN physical input is configured and the input is open (nvoIO.ScheduleMaster = 0).

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

Table 23. Status Points.

Digital State or

Value of State

E-Vision (M, P, S)

Hardware Config.

Direct Access

Manual Config.

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

User Address NvName Field Name

nroPgmVer id[ RTU1 R

nroPgmVer major_ver 1 R

nroPgmVer minor_ver 0 R

nroPgmVer bug_ver 0 R

nroPgmVer node_type 1 R

81 74-2958—1

SrcEmerg nvoEmerg EMERG_NORMAL

nvoAlarm subnet 1 to 255 0 subnet is the L

nvoAlarm node 0 to 127 0 node is the L

nvoAlarm type 0 to 255 0 type is the alarm type being issued. When an alarm condition is no longer

StatusAlmTyp nvoAlarmStatus alarm_bit[0]

nvoAlarmStatus alarm_bit[0]

Byte Offset = 0 Bit Offset = 0(InputNVFailAlrm)

Byte Offset = 0 Bit Offset = 1 (NodeDisableAlrm)

Engineering Units: English

(Metric) or States plus Range

EMERG_PRESSURIZE EMERG_DEPRESSURIZE EMERG_PURGE EMERG_SHUTDOWN EMERG_NUL

FALSE TRUE

Map

Default

EMERG_NORMAL M X X Emerg is an emergency output reflecting the state of the locally wired

0 1 2 3 4 255

01FALSE X X alarm_bit[0]Byte Offset = 0Bit Offset = 0(InputNVFailAlrm)alarm_bit [n]

01FALSE alarm_bit[0]

Test

Comments

A four byte ASCII string indicating the type of node (model). O M

Software version. O M

The NodeType is a numeric identifier that is stored in EPROM that identifies

the Excel 10 node type. Whenever a new software version or upgrade is

issued, this is reflected in nroPgmVer which typically is read by a network

management node to identify the node type. The contents of nroPgmVer

contain compatible model type information and is fixed at the time when the

node software is compiled.

smoke detector. If Emerg is EMERG_NORMAL, then no smoke is being

detected by the local sensor or that the smoke detector input is not

configured. If Emerg is EMERG_PURGE, the locally wired smoke sensor is

indicating a smoke conditio n.EMERG_PRESSURIZE,

EMERG_DEPRESSURIZE, and EMERG_SHUTDOWN are not supported

by Emerg. If Emerg is not configured then it is set to EMERG_NUL

ONWORKS

domain table) to which the node is assigned.

domain table) assigned to the node.

TRUE, type i s s et to th e sum of the al ar m con d i ti o ns nu me r i c v alu e a nd th e

RETURN_TO_NORMAL numeric value. The type also is recorded in

AlarmLog. When a new alarm is detected, just the corresponding numeric

value for the alarm is reported. Refer to Table 12 (Excel 10 Alarms) in the

System Engineering Guide for all the error conditions that may be reported.

contains a bit for every possible alarm condition. Each alarm type has a

corresponding bit in alarm_b it[n ] (Alarm .typ e: 1.2 4, with out

RETURN_TO_NORMAL).

Byte Offset = 0

Bit Offset = 1

(NodeDisableAlrm)

ONWORKS

subnet number (in domain entry 1 of the nodes

node number (in domain entry 1 of the nodes

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—182

Table 23. Status Points. (Continued)

Digital State or

Value of State

E-Vision (M, P, S)

Direct Access

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

Hardware Config.

Manual Config.

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

User Address NvName Field Name

nvoAlarmStatus alarm_bit[0]

nvoAlarmStatus alarm_bit[1]

Byte Offset = 0 Bit Offset = 2 (SensorFailAlrm)

Byte Offset = 0 Bit Offset = 3 (FrostProtectAlrm)

Byte Offset = 0 Bit Offset = 4 (InvalidSetPtAlrm)

Byte Offset = 0 Bit Offset = 5 (LossAirFlowAlrm)

Byte Offset = 0 Bit Offset = 6 (DirtyFilterAlrm)

Byte Offset = 0 Bit Offset = 7 (SmokeAlrm)

Byte Offset = 1 Bit Offset = 0 (IaqOverRideAlrm)

Engineering Units: English

(Metric) or States plus Range

FALSE TRUE

Map

Default

01FALSE alarm_bit[0]

01FALSE alarm_bit[1]

Test

Byte Offset = 0

Bit Offset = 2

(SensorFailAlrm)

Byte Offset = 0

Bit Offset = 3

(FrostProtectAlrm)

Byte Offset = 0

Bit Offset = 4

(InvalidSetPtAlrm)

Byte Offset = 0

Bit Offset = 5

(LossAirFlowAlrm)

Byte Offset = 0

Bit Offset = 6

(DirtyFilterAlrm)

Byte Offset = 0

Bit Offset = 7

(SmokeAlrm)

Byte Offset = 1

Bit Offset = 0

(IaqOverRideAlrm)

Comments

Table 23. Status Points. (Continued)

Digital State or

Value of State

E-Vision (M, P, S)

Hardware Config.

Direct Access

Manual Config.

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

User Address NvName Field Name

AlarmLog1 nvoAlarmLog type[0]

83 74-2958—1

nvoData1 (nvoCtlDataG1)

Engineering Units: English

(Metric) or States plus Range

0 to 255 (AlarmTypeLog0) (AlarmTypeLog1) (AlarmTypeLog2) (AlarmTypeLog3) (AlarmTypeLog4)

FieldNo UPDATE_ALL_FIELDS

NO_ALARM INPUT_NV_FAILURE NODE_DISABLED SENSOR_FAILURE FROST_PROTECTION INVALID_SET_POINT LOSS_OF_AIR_FLOW DIRTY_FILTER SMOKE_ALARM IAQ_OVERRIDE LOW_LIM_ECON_CLOSE rINPUT_NV_FAILURE rNODE_DISABLED rSENSOR_FAILURE rFROST_PROTECTION rINVALID_SET_POINT rLOSS_OF_AIR_FLOW rDIRTY_FILTER rSMOKE_ALARM rIAQ_OVERRIDE rLOW_LIM_ECON_CLOSE ALARM_NOTIFY_DISABLED

MODE_FIELD EFFECT_OCC_FIELD OVERRIDE_FIELD SCHED_OCC_FIELD OCC_TIME_CLOCK_FIELD NET_MAN_OCC_FIELD SEN_OCC_FIELD ECON_ENABLE_FIELD PROOF_AIR_FLOW_FIELD CALC_OD_ENTHALPY_FIELD CALC_RA_ENTHALPY_FIELD HEAT_STAGES_ON_FIELD COOL_STAGES_ON_FIELD FREE1_OUT_FIELD FREE2_OUT_FIELD OCC_STATUS_OUT_FIELD FAN_ON_FIELD AUX_ECON_OUT_FIELD ECON_FLOAT_SYNCH_FIELD DLC_SHED_FIELD IAQ_OVERRIDE_FIELD SMOKE_MONITOR_FIELD WINDOW_OPEN_FIELD DIRTY_FILTER_FIELD SHUTDOWN_FIELD MON_SWITCH_FIELD WSHP_ENABLE_FIELD UPDATE_NO_FIELDS

Map

Default

NO_ALARM X ype[0] 1 2 3 4 5 6 7 8 9 10 129 130 131 132 133 134 135 136 137 138 255

UPDATE_ALL_FIELDS FieldNo: nvoData1 and nvoCtlDataG1 are output network variables

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 127

Test

Comments

0 to 255 (AlarmTypeLog0) (AlarmTypeLog1) (AlarmTypeLog2) (AlarmTypeLog3) (AlarmTypeLog4) A supervisory node may poll th e AlarmLog output for a short alarm history. The last five alarm reports sent via nvoAlarm are reported via AlarmLog. When ALARM_NOTIFY_DISABLED is entered into the log, further alarms or return to normals are not entered into the log, until alarm reporting is again enabled. If Alarm is bound and not being acknowledged, the last alarm report entered into AlarmLog is the one that was not acknowledged.See Alarm and AlarmStatus for related subjects.type [n] specifies the alarm that was issued via Alarm. See Alarm for the alarm types used in AlarmLog. The newest alarm is reported in type[0] and the oldest is reported in type[4]. When a new entry is made to the log, the oldest entry is lost.

indicating the node status. The information contained in these network variables are typically used to display the node status on an operator terminal, used in a trend log, or used in a control process. The information contained in nvoCtlDataG1 and nvoData1 are identical. nvoCtlDataG1 uses the SGPUC mechanism to update the status or values. The fields in nvoData are updated when network variables are polled by the receiver. Then every six seconds the difference between the field in nvoData and nvoCtlDataG is calculated. If the difference is significant the field is updated according to the SGPUC mechanism. FieldNo indicates which other data field in the SGPUC network variable has changed since the last time it was sent on the network according to the SGPUC mechanism. If FieldNo is UPDATE_ALL_FIELDS, then all fields have been updated. If FieldNo is UPDATE_NO_FIELDS, then no fields have been updated recently.

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—184

Table 23. Status Points. (Continued)

Digital State or

Value of State

E-Vision (M, P, S)

Direct Access

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

Hardware Config.

Manual Config.

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

User Address NvName Field Name

StatusMode nvoData1

StatusOcc nvoData1

StatusOvrd nvoData1

StatusSched nvoData1

TimeClckOcc nvoData1

(nvoCtlDataG1)

Mode START_UP_WAIT

EffectOcc OC_OCCUPIED

Override OC_OCCUPIE

SchedOcc OC_OCCUPIED

OccTimeClock ST_OFF

Engineering Units: English

(Metric) or States plus Range

HEAT COOL OFF_MODE DISABLED_MODE EMERG_HEAT SMOKE_EMERGENCY FREEZE_PROTECT MANUAL FACTORY_TEST FAN_ONLY

OC_UNOCCUPIED OC_BYPASS OC_STANDBY OC_NUL

DOC_UNOCCUPIED OC_BYPASS OC_STANDBY OC_NUL

OC_UNOCCUPIED OC_BYPASS OC_STANDBY OC_NUL

ST_LOW ST_MED ST_HIGH ST_ON ST_NUL

Map

Default

START_UP_WAIT X Mode: The result of the controller determining which mode of operation it 1 2 3 4 5 6 7 8 9 10

OC_NUL X EffectOcc: Result of controller supervising the various Occupied controlling 1 2 3 255

OC_NUL X Override: Is the effective manual override state arbitrated from NetManOcc, 1 2 3 255

OC_NUL X DestSchedOcc: DestSchedOcc is calculated from OccTimeClock and 1 2 3 255

ST_NUL X OccTimeClock: OccTimeClock shows the state of the physical time clock 1 2 3 4 255

Test

Comments

currently is in. At each power-up, the controller remains in the Start-Up and Wait mode (a random time from 0 to 20 minutes that is based on the units network number). After that period, the mode changes to initialize actuators that will fully close the damper and valve actuators to insure full travel when under program control. The various other modes are due to normal operation as well as manual and network commands.

inputs and deciding which one to use. See StatusinOcy, DestSchedOcc, ManualOcc and StatusOvrd.

the wall module override button and the Bypass Timer.

nviTodEvent.Cur rentState using the following logic: If nviTodEvent.CurrentState is OC_OCCUPIED and OccTimeClock is ST_NUL, then DestSchedOcc is OC_OCCUPIED. If nviTodEvent.CurrentState is OC_UNOCCUPIED and OccTimeClock is ST_NUL, then DestSchedOcc is OC_UNOCCUPIED. If nviTodEvent.CurrentState is OC_STANDBY and OccTimeClock is ST_NUL, then DestSchedOcc is OC_STANDBY. If nviTodEvent.CurrentState is don’t care and OccTimeClock is ST_ON, then DestSchedOcc is OC_OCCUPIED. If nviTodEvent.CurrentState is don’t care and OccTimeClock is ST_OFF, then DestSchedOcc is OC_UNOCCUPIED. OC_OCCUPIED means the space is scheduled to be occupied. OC_UNOCCUPIED means the space is scheduled to be unoccupied. OC_STANDBY means the space is scheduled to be in a standby state somewhere between OC_OCCUPIED and OC_UNOCCUPIED.

input via nvoIO.OccTimeClock ORed with nviTimeClk. Valid enumerated values are: ST_OFF means OC_UNOCCUPIED when either the time clock input is configured and nvoIO.OccTimeClock is 0 and nviTimeClk is not SW_ON or nv iT im eClk .st ate is SW_ OFF and nvo IO. Occ TIm eCloc k i s n ot 1 . ST_ON means OC_OCCUPIED when either the time clock input is configured and nvoIO.OccTimeClock is 1 or nviTimeClk.state is SW_ON. ST_NUL means that the local time clock input is not configured by nciIoSelect and nviTimeClk.state is SW_NUL. There is no time clock configured or bound to the node.

Table 23. Status Points. (Continued)

Digital State or

Value of State

E-Vision (M, P, S)

Hardware Config.

Direct Access

Manual Config.

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

User Address NvName Field Name

StatusManOcc nvoData1

StatusOcySen nvoData1

StatusEconEn nvoData1

85 74-2958—1

SaFanStatus nvoData1

OaEnthCalc nvoData1

RaEnthCalc nvoData1

(nvoCtlDataG1)

Engineering Units: English

(Metric) or States plus Range

NetManOcc OC_OCCUPIED

SenOcc OC_OCCUPIED

EconEnable ST_OFF

ProofAirFlow ST_OFF

siCalcODEnthalpyS7 btu/lb

siCalcRAEnthalpyS7 btu/lb

OC_UNOCCUPIED OC_BYPASS OC_STANDBY OC_NUL

ST_LOW ST_MED ST_HIGH ST_ON ST_NUL

0 to 100

Map

Default

OC_NUL X NetManOcc: NetManOcc reports the network manual occupancy state from 1 2 3 255

OC_NUL X SenOcc: SenOcc indicates the current state of the sensed occupancy and 1 2 3 255

ST_NUL X EconEnable: EconEnable indicates the current suitability of outdoor air for

0 1 2 3 4 255

ST_NUL X ProofAirFlow: ProofAirFlow indicates the current state of the ProofAirFlow

0 1 2 3 4 255

SI_INVALID X siCalcODEnthalpyS7: siCalcODEnthalpyS7 is the calculated outdoor air

SI_INVALID X siCalcRAEnthalpyS7: siCalcRAEnthalpyS7 is the calculated return air

Test

Comments

nviManOcc. The valid enumerated states are: OC_OCCUPIED indicates occupied OC_UNOCCUPIED indicates not occupied OC_BYPASS indicates that the space is bypass occupied for nciAux2SetPt.uiBypassTime seconds after nviManOcc is first set to OC_BYPASS OC_STANDBY indicates that the space is standby. OC_NUL means that no manual override is active.

is calculated from nviSensorOcc and the local occupancy sensor via nvoIO.OccupancySensor. The local sensor and nviSensorOcc are ORed together. If either the local sensor or nviSensorOcc shows occupancy, then SenOcc shows occupancy. The valid enumerated values are: OC_OCCUPIED means that occupancy is sensed by one or more sensor.OC_UNOCCUPIED means that no occupancy is sensed by any sensors.OC_NUL means no local sensor is configured and nviSensorOcc has failed to be received periodically (bound or not bound).

use in cooling used by the control process EconEnable is periodically calculated either from the sensor(s) specified by nciConfig.EconEnable or from nviEcon. When nviEcon.state is not SW_NUL, then the local inputs are ignored and nviEcon.state is used instead. See nciConfig.EconEnable. The valid enumerated values are: ST_OFF means the outdoor air is not suitable to augment cooling. ST_ON means the outdoor air is suitable to augment cooling.ST_NUL means no local sensor is selected by nciConfig.EconEnable, or the selected local sensor has failed or has not been configured by nciIoSelect, and that nviEcon.state is SW_NUL. The outdoor air is considered unsuitable for cooling.

switch used by the control process and is read by the local sensor via nvoIO.ProofAirFlow. The valid enumerated values are: ST_OFF means air flow is not detected. ST_ON means air flow is detected. ST_NUL means no air flow switch is configured.

enthalpy in btu / lb calculated from the siOutdoorTempS7 and ubOutdoorHumidityS1. siCalcODEnthalpyS7 is used to determine the suitability of outside air for cooling when nciConfig.EconEnable is SINGLE_ENTH and both outdoor temperature and humidity sensors are present. siCalcODEnthalpyS7 is compared to the enthalpy setpoint stored in nciAux1SetPts.ubOdEnthalpyEnableS2.

enthalpy in btu / lb calculated from the siReturnTempS7 and ubReturnHumidityS1. siCalcRAEnthalpyS7 is used to determine the suitability of outside air for cooling when nciConfig.EconEnable is DIFF_ENTH and both outdoor and return (or space) temperature sensors and humidity sensors are present. Sensors may be physically connected to the node or available over the network.

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—186

Table 23. Status Points. (Continued)

Digital State or

Value of State

E-Vision (M, P, S)

Direct Access

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

Hardware Config.

Manual Config.

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

User Address NvName Field Name

HeatStgsOn nvoData1

CoolStgsOn nvoData1

Free1Stat nvoData1

Free2Stat nvoData1

OccStatOut nvoData1

SaFan nvoData1

StatusEconOut nvoData1

DlcShed nvoData1

(nvoCtlDataG1)

nvoData1 (nvoCtlDataG1)

(nvoCtlDataG1)

HeatStagesOn 0 to 4 0 X HeatStagesOn: HeatStagesOn indicates how many heating stages are on.

CoolStagesOn 0 to 4 0 X CoolStagesOn: CoolStagesOn indicates how many compressor stages are

Free1Out FALSE

Free2Out FALSE

OccStatusOut FALSE

FanOn FALSE

AuxEconOut FALSE

EconFloatSynch FALSE

DlcShed FALSE

Engineering Units: English

(Metric) or States plus Range

TRUE

Map

Default

01FALSE X Free1Out: Free1Out indicates the state of FREE1_OUT digital output. 1

01FALSE X Free2Out: Free2Out indicates the state of FREE2_OUT digital output. 1

01FALSE X OccStatusOut: OccStatusOut indicates the state of the

01FALSE X FanOn: FanOn indicates the state of the FAN_OUT digital output. 1 means

01FALSE X AuxEconOut: AuxEconOut indicates the state of the AUX_ECON_OUT

01FALSE EconFloatSynch: EconFloatSynch indicates that the economizer damper

01FALSE DlcShed: DlcShed indicates the state of nviDlcShed. When DlcShed is 1,

Test

Comments

If the node is controlling a heat pump, HeatStagesOn indicates how many auxiliary heating stages are turned on.

on. If the node is controlling a heat pump, compressor stages are turned on for both heating or cooling.

means on, and 0 means off.

OCCUPANCY_STATUS_OUT digi tal output. 1 means on (not OC_UNOCCUPIED), and 0 means off (OC_UNOCCUPIED).

on, and 0 means off.

digital output. 1 means that the packaged economizer is enabled, and 0 means the economizer is disabled. A packaged economizer is always treated as the first stage of cooling when an economizer is configured by nciIoSelect.

motor is being synchronized with the reported economizer position by driving the damper for a period longer than it takes to fully close the damper. The reported economizer position is synchronized whenever an endpoint is reached (full op en or full close).and when the elapsed time since the last synchronization is 24 hours.

demand limit control set by an energy management node is active. If the effective occupancy is OC_OCCUPIED or OC_STANDBY when demand limit control is active, then the setpoint is shifted by nciAux1SetPt.siDlcBumpTempS7 in the energy saving direction. When DlcShed is 0, demand limit control is inactive. If nviDlcShed fails to be received periodically or nviDlcShed becomes 0, then the setpoint is ramped back to the original setpoint over a 30 minute interval.

Table 23. Status Points. (Continued)

Digital State or

Value of State

E-Vision (M, P, S)

Hardware Config.

Direct Access

Manual Config.

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

User Address NvName Field Name

StatusIaqOvr nvoData1

StatusSmoke nvoData1

87 74-2958—1

StatusWndw nvoData1

StatusFilter nvoData1

ShutDown nvoData1

StatFreezeStat nvoData1

MonitorSw nvoData1

(nvoCtlDataG1)

Engineering Units: English

(Metric) or States plus Range

IaqOverRide FALSE

SmokeMonitor FALSE

WindowOpen FALSE

DirtyFilter FALSE

ShutDown FALSE

CoilFreezeStat FALSE

MonSwitch FALSE

TRUE

Map

Default

01FALSE X IaqOverRide: When an economizer is configured, IaqOverRide indicates

01FALSE X SmokeMonitor: SmokeMonitor indicates the current state of the

01FALSE X WindowOpen: WindowOpen indicates the current state of the window

01FALSE X DirtyFilter: DirtyFilter indicates the state of the air filter via the

01FALSE X ShutDown: ShutDown indicates the state of the ShutDown input via

01FALSE M X X StatFreezeStat: StatFreezeStat gives the state of the cooling coil controlled

01FALSE X MonSwitch: MonSwitch is the state of the digital input wired to a general

Test

Comments

the current state of the indoor air quality, an is used by the control process to open the economizer damper to let in more outside air. 1 means poor indoor air quality, and 0 means indoor air quality is OK. When IaqOverRide is 1, the IAQ_OVERRIDE alarm is initiated. IaqOverRide indicates poor air quality if the analog sensor OR a digital sensor (local or via network) shows poor air quality. Specifically, if nvoData2.siSpaceCo2S0 is not SI_INVALID, and exceeds nciAux1SetPt.siCO2IaqLimitS0, then poor air quality is detected. Also if nviIaqOvr.state is SW_ON, then poor air quality is detected. Or if a local digital input is configured as IAQ_OVERRIDE_IN and nvoIO.IaqOverRide is 1 then poor air quality is also detected. When poor air quality is detected, the economizer minimum position is set to nciAux1SetPts.ubEconIaqPosS0, instead of nciAux1SetPts.ubEconMinPosS0.When an economizer is not configured, IaqOverRide is 0.

SmokeMonitor input used by the control process and is read from another node via nviEmerg or the local sensor via nvoIO.SmokeMonitor. If either nviEmerg is not EMERG_NORMAL or nvoIO.SmokeMonitor is 1, then SmokeMonitor is 1 meaning that smoke is detected. Otherwise SmokeMonitor is 0, meaning smoke is not detected. When smoke monitor is 1, the algorithm controls as per the settings found in nciConfig.SmokeControl.

sensors and is calculated from nviWindow state and the local occupancy sensor via nvoIO.WindowOpen. The local sensor and nviWindow are ORed together. If either the local sensor or nviWindow shows that the window is open (nvoIO.WindowOpen = 1 or nviWindow.state = SW_ON), then WindowOpen shows that the window is open. 1 means th at the window is open and 0 means that the window is closed. When the window is open, the controller mode is switched to FREEZE_PROTECT.

nvoIO.DirtyFilter digital input or the nvoData1.siFilterPressureS10 analog input. If nvoData1.siFilterPressureS10 exceeds nciAux2SetPt.ubFilterPressStPtS5, a dirty filter is indicated. DirtyFilter is set to 1 when a dirty filter has been detected by either method for one minute. DirtyFilter is set to 0 when a dirty filter has not been detected by either method for one minute. When DirtyFilter is 1, a DIRTY_FILTER alarm is generated.

nvoIO.ShutDown. 1 means a ShutDown is being commanded and 0 means normal operation.

by the CVAHU. False (0) it is not freezing or True (1) it is freezing. NOTE: Only use this User Address when using E-Vision.

purpose monitor switch via nvoIO.MonSwitch. 1 means that the switch is closed and 0 means that the switch is open.

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—188

Table 23. Status Points. (Continued)

Digital State or

Value of State

E-Vision (M, P, S)

Direct Access

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

Hardware Config.

Manual Config.

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

User Address NvName Field Name

WSHPEnable nvoData1

BypTimer nvoData2

RmTempActSpt nvoData2

RmTemp nvoData2

(nvoCtlDataG1)

nvoData2 (nvoCtlDataG2)

(nvoCtlDataG2)

WSHPEnable FALSE

FieldNo UPDATE_ALL_FIELDS

uiBypassTimer minutes

siTempControlPtS7 Degrees F

siSpaceTempS7 Degrees F

Engineering Units: English

(Metric) or States plus Range

TRUE

BYPASS_TIMER_FIELD TEMP_CONTROL_PT_FIELD SPACE_TEMP_FIELD DISCHARGE_TEMP_FIELD DISCHARGE_SET_PT_FIELD RETURN_TEMP_FIELD RETURN_HUMIDITY_FIELD RETURN_ENTHALPY_FIELD OUTDOOR_TEMP_FIELD OUTDOOR_HUMIDITY_FIELD OUTDOOR_ENTHALPY_FIELD FILTER_PRESSURE_FIELD SPACE_CO2_FIELD MONITOR_VOLTS_FIELD COOL_POS_FIELD HEAT_POS_FIELD ECON_POS_FIELD UPDATE_NO_FIELDS

0 to 2880

50 to 85 Degrees C (10 to 29)

40 to 100 Degrees C (4 to 38)

Map

Default

01FALSE X WSHPEnable: WSHPEnable reports the state of the current state of

UPDATE_ALL_FIELDS nvoData2. FieldNo: nvoData2 and nvoCtlDataG2 are output network

0 X uiBypassTimer: The time left in the bypass timer is uiBypassTimer minutes.

SI_INVALID X siTempControlPtS7: The current temperature control point (such that, the

SI_INVALID siSpaceTempS7: siSpaceTempS7 is the space temperature used by the

Test

Comments

nviWSHPEnable. The states for nviWSHPEnable are as follows: If nviWSHPEnable.state is SW_OFF and the nviWSHPEnable.value is 0, then WSHPEnable is 0 (Disable Water Source Heat Pump). If nviWSHPEnable.state is SW_ON and the nviWSHPEnable.value is 0, then WSHPEnable is 0 (Disable Water Source Heat Pump). If nviWSHPEnable.s tate is SW_O N and the nvi WS HPE na ble .val ue is not 0, then WSHPEnable is 1 (Enable Water Source Heat Pump). If nviWSHPEnable.state is SW_NUL and the nviWSHPEnable.value is any value, then WSHPEnable is 1 (Enable Water Source Heat Pump when nviWSHPEnable is not bound to another node).

variables indicating the node status. The information contained in these network variables are typically used to display the node status on an operator terminal, used in a trend log, or used in a control process. The information contained in nvoCtlDataG2 and nvoData2 are identical. nvoData2 is a polled network variable and must be polled by the receiver. nvoCtlDataG2 uses the SGPUC mechanism. FieldNo indicates which other data field in the SGPUC network variable has changed since the last time it was sent on the network according to the SGPUC mechanism.

If uiBypassTimer is zero, then the bypass timer is not running. If uiBypassTimer is not zero, it is decremented every minute.

current actual space temperature setpoint which the controller is presently trying to maintain in the conditioned space) is calculated from the various Setpoints, operating modes, network variable inputs, and optimum start-up parameters. The final result is stored in siTempControlPtS7.

control process and is read from another node via nviSpaceTemp or a local sensor via nvoIO.siSpaceTempS7 or nvoIO.siReturnTempS7. If the network input is not SI_INVALID, then the network input has priority. The local sensor is selected by nciConfig.ControlUsesRtnAirTemp. When nciConfig.ControlUsesRtnAirTemp is 0, then the space temperature sensor is selected. When nciConfig.ControlUsesRtnAirTemp is 1, then the return temperature sensor is selected. If the network input and the selected local sensor has failed or are not configured, siSpaceTempS7 is SI_INVALID.

Table 23. Status Points. (Continued)

Digital State or

Value of State

E-Vision (M, P, S)

Hardware Config.

Direct Access

Manual Config.

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

User Address NvName Field Name

DaTemp nvoData2

DaSetpt nvoData2

RaTemp nvoData2

RaHum nvoData2

RaEnth nvoData2

89 74-2958—1

OaTemp nvoData2

OaHum nvoData2

OaEnth nvoData2

FilterPress nvoData2

CO2Sens nvoCtlDataG2 siSpaceCo2S0 PPM

(nvoCtlDataG2)

siDischargeTempS7 Degrees F

siDischargeSetPtS7 Degrees F

siReturnTempS7 Degrees F

ubReturnHumidityS1 Percentage

siReturnEnthalpyS7 mA

siOutdoorTempS7 Degrees F

ubOutdoorHumidityS1 Percentage

siOutdoorEnthalpyS7 mA

siFilterPressureS10 inw (kPa)

Engineering Units: English

(Metric) or States plus Range

30 to 122 Degrees C (-1 to 50)

10 to 90

4 to 20

-40 to 122 Degrees C (-40 to 43)

10 to 90

4 to 20

0 to 5 (0 to 1.25)

150 to 2000

Map

Default

SI_INVALID X siDischargeTempS7: siDischargeTempS7 is the dischar ge air temperature

SI_INVALID X siDischargeSetPtS7: siDischargeSetPtS7 is the calculated desired

SI_INVALID X siReturnTempS7: siReturnTempS7 is the return air temperature used by the

UB_INVALID X ubReturnHumidityS1: ubReturnHumidityS1 is the return air humidity used

SI_INVALID X siReturnEnthalpyS7: siReturnEnthalpyS7 is the return air enthalpy used by

SI_INVALID X siOutdoorTempS7: siOutdoorTempS7 is the outdoor air temperature used

UB_INVALID X ubOutdoorHumidityS1: ubOutdoorHumidityS1 is the outdoor air humidity

SI_INVALID X siOutdoorEnthalpyS7: siOutdoorEnthalpyS7 is the outdoor air enthalpy

SI_INVALID X siFilterPressureS10: siFilterPressureS10 is air pressure across the air filter

SI_INVALID X siSpaceCo2S0: siSpaceCo2S0 is the indoor air CO

Test

Comments

used by the control process and is read from the local sensor via nvoIO.siDischargeTempS7. If the sensor has failed or is not configured, siDischargeTempS7 is SI_INVALID.

discharge air temperature when cascade control is being used.

control process read from the local sensor via nvoIO.siReturnTempS7. If the sensor has failed or is not configured, siReturnTempS7 is SI_INVALID.

by the control process and is read from the local sensor via nvoIO.ReturnHumidity. If the sensor has failed or is not configured ubReturnHumidity S1 is UB_I NVALID.

the control process and is read from the local sensor via nvoIO.siReturnEnthalpyS7. If the sensor has failed or is not configured, siReturnEnthalpyS7 is SI_INVALID.

by the control process and is read from another node via nviOdTemp or the local sensor via nvoIO.siOutdoorTempS7. If the network input is not SI_INVALID, then the network input has priority. If both the network input and the local sensor have failed or are not configured, siOutdoorTempS7 is SI_INVALID.

used by the control process and is read from another node via nviOdHum or the local sensor via nvoIO.OutdoorHumidity. If the network is not SI_INVALID, then the network input has priority. If both the network input and the local sensor have failed or are not configured, ubOutdoorHumidityS1 is UB_INVALID.

used by the control process and is read from another node via nviOdEnthS7 or the local sensor via nvoIO.siOutdoorEnthalpyS7. If the network input is not SI_INVALID, then the network input has priority. If both the network input and the local sensor have failed or are not configured, siOutdoorEnthalpyS7 is SI_INVALID.

used by the control process and is read from the local sensor via nvoIO.siFilterPressureS10. If the local sensor has failed or is not configured, siFilterPressureS10 is SI_INVALID.

content used by the

control process and read the local sensor via nvoIO.siSpaceCo2S0. If the local sensor has failed or is not configured, siSpaceCo2S0 is SI_INVALID.

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—190

Table 23. Status Points. (Continued)

Digital State or

Value of State

E-Vision (M, P, S)

Direct Access

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

Hardware Config.

Manual Config.

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

User Address NvName Field Name

MonitorSens nvoCtlDataG2 siMonitor1S10 volts

CoolPos nvoCtlDataG2 sbCoolPosS0 Percentage

HeatPos nvoCtlDataG2 sbHeatPosS0 Percentage

EconPos nvoCtlDataG2 sbEconPosS0 Percentage

StatusError nvoError error_bit[0]

nvoError error_bit[0]

Byte Offset = 0 Bit Offset = 0 (SpaceTempError)

Byte Offset = 0 Bit Offset = 1 (SetPtError)

Byte Offset = 0 Bit Offset = 2 (OdTempError)

Byte Offset = 0 Bit Offset = 3 (OdHumError)

Byte Offset = 0 Bit Offset = 4 (OdEnthalpyError)

Byte Offset = 0 Bit Offset = 5 (DischgTempError)

Byte Offset = 0 Bit Offset = 6 RtnTempError)

Byte Offset = 0 Bit Offset = 7 (RtnHumError)

Engineering Units: English

(Metric) or States plus Range

1 to 10

0 to 100

FALSE TRUE

Map

Default

SI_INVALID X siMonitor1S10: siMonitor1S10 is the voltage applied at the monitor input

0 X sbCoolPosS0: If the node is configured for modulating cool, sbCoolPosS0

0 X sbHeatPosS0: If the node is configured for modulating heat, sbHeatPosS0

0 X sbEconPosS0: If the node is configured for modulating economizer,

01FALSE X For SpaceTempError, a value of 1 (TRUE) indicates that data was not

01FALSE For SetPtError, see preceding. Upon a failure of the local setpoint, the

01FALSE For OdTempError, see preceding. All control functions associated with the

01FALSE For OdHumError, see preceding. A value of 0 (FALSE) indicates a normal

01FALSE OdEnthalpyError: All control functions associated with the failed sensor are

01FALSE DischgTempError: All control functions associated with the failed sensor are

01FALSE RtnTempError: All control functions associated with the failed sensor are

01FALSE RtnHumError: All control functions associated with the failed sensor are

Test

Comments

terminals. If the sensor is not configured or has failed, the value is SI_INVALID.

shows the current position of the cooling modulating output.

shows the current position of the heating modulating output.

sbEconPosS0 shows the current position of the economizer modulating output.

available from the sensor and will result in a SENSOR_FAILURE alarm. A value of 0 (FALSE) indicates a normal condition. The heating and cooling control loops will be turned off it there is a space temp sensor failure. The fan will remain under normal control.

control loop will use the default occupied setpoints to control space temperature.

failed sensor are disabled as if the sensor was not configured.

condition. All control functions associated with the failed sensor are disabled as if the sensor was not configured.

disabled as if the sensor was not configured.

Table 23. Status Points. (Continued)

Digital State or

Value of State

E-Vision (M, P, S)

Hardware Config.

Direct Access

Manual Config.

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

User Address NvName Field Name

nvoError error_bit[1]

91 74-2958—1

nvoError error_bit[1]

nvoError error_bit[2]

Byte Offset = 1 Bit Offset = 0 (RtnEnthalpyError)

Byte Offset = 1 Bit Offset = 1 (MonitorSensorError)

Byte Offset = 1 Bit Offset = 2 (SpaceCO2Error)

Byte Offset = 1 Bit Offset = 3 (FilterStaticPresError)

Byte Offset = 1 Bit Offset = 4 (ADCalError)

Byte Offset = 1 Bit Offset = 7 (nvApplModeError)

Byte Offset = 2 Bit Offset = 0 (nvSetPtOffsetError)

Byte Offset = 2 Bit Offset = 1 (nvSpaceTempError)

Byte Offset = 2 Bit Offset = 2 (nvOdTempError)

Byte Offset = 2 Bit Offset = 3 (nvOdHumError)

Byte Offset = 2 Bit Offset = 4 (nvSensorOccError)

Engineering Units: English

(Metric) or States plus Range

FALSE TRUE

01FALSE Rt nEn tha lpyE rro r: A ll cont ro l func ti ons ass oci ate d wi th t he fai le d sen sor ar e

01FALSE MonitorSensorError: All control functions associated with the failed sensor

01FALSE SpaceCO2Error: All control functions associated with the failed sensor are

01FALSE FilterStaticPresError: All control functions associated with the failed sensor

01FALSE ADCalError: All control functions associated with the failed sensor are

01FALSE ApplModeError: All control functions associated with the failed NV are

01FALSE SetPtOffsetError: All control functions associated with the failed NV are

01FALSE SpaceTempError: All control functions associated with the failed NV are

01FALSE OdTempError: All control functions associated with the failed NV are

01FALSE OdHumError: All control functions associated with the failed NV are

01FALSE SensorOccError: All control functions associated with the failed NV are

Default

Map

Test

Comments

disabled as if the sensor was not configured.

are disabled as if the sensor was not configured.

disabled as if the sensor was not configured.

are disabled as if the sensor was not configured.

disabled as if the sensor was not configured.

disabled as if the NV was not configured.

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—192

Table 23. Status Points. (Continued)

Digital State or

Value of State

E-Vision (M, P, S)

Direct Access

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

Hardware Config.

Manual Config.

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

User Address NvName Field Name

nvoError error_bit[2]

nvoError error_bit[3]

Byte Offset = 2 Bit Offset = 5 (nvWindowError)

Byte Offset = 2 Bit Offset = 6 (nvDlcShedError)

Byte Offset = 2 Bit Offset = 7 (nvTodEventError)

Byte Offset = 3 Bit Offset = 0 (nvByPassError)

Byte Offset = 3 Bit Offset = 1 (nvOdEnthalpyError)

Byte Offset = 3 Bit Offset = 2 (nvEconError)

Byte Offset = 3 Bit Offset = 3 (nvIaqOverrideError)

Byte Offset = 3 Bit Offset = 4 (nvFree1Error)

Engineering Units: English

(Metric) or States plus Range

FALSE TRUE

Map

Default

01FALSE WindowError: All control functions associated with the failed NV are

01FALSE DlcShedError: All control functions associated with the failed NV are

01FALSE TodEventError: All control functions associated with the failed NV are

01FALSE ByPassError: All control functions associated with the failed NV are

01FALSE OdEnthalpyError: All control functions associated with the failed NV are

01FALSE EconError: All control functions associated with the failed NV are disabled

01FALSE IaqOverrideError: All control functions associated with the failed NV are

01FALSE Free1Error: All control functions associated with the failed NV are disabled

Test

Comments

disabled as if the NV was not configured.

as if the NV was not configured.

disabled as if the NV was not configured.

as if the NV was not configured.

Table 23. Status Points. (Continued)

Digital State or

Value of State

E-Vision (M, P, S)

Hardware Config.

Direct Access

Manual Config.

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

User Address NvName Field Name

nvoError error_bit[3]

NetConfig nciNetConfig CFG_LOCAL

93 74-2958—1

User Address NvName Field Name

nvoRaw K1Raw

Byte Offset = 3 Bit Offset = 5 (nvFree2Error)

Byte Offset = 3 Bit Offset = 6 (nvTimeClockError)

Byte Offset = 3 Bit Offset = 7 (nvWSHPEnError)

K2Raw Ai1Resistive Ai2Resistive Ai3Voltage Ai4Voltage RawSpaceTemp RawSetPoint

Engineering Units: English

(Metric) or States plus Range

FALSE TRUE

CFG_EXTERNAL CFG_NUL

Engineering Units: English

(Metric) or States plus Range

Counts 0 to 65535

Map

Default

01FALSE Free2Error: All control functions associated with the failed NV are disabled

01FALSE TimeClockError: All control functions associated with the failed NV are

01FALSE WSHPEnError: All control functions associated with the failed NV are

CFG_LOCAL All nodes that support self-installation provide a configuration variable to

0 1 255

Table 24. Calibration Points.

Digital State or

Value of State

Default

0 raw_data contains the analog to digital converter counts measured from the

E-Vision (M, P, S)

Direct Access

Map

Test

Comments

as if the NV was not configured.

disabled as if the NV was not configured.

allow a network management tool to also install the node. nciNetConfig is only used by a network management tool and may have t he following values: CFG_LOCAL - Node will use self installation functions to set its own network im age . CF G_EX TERN AL - T he no des net wor k im age has been set by an external source.

Hardware Config.

Manual Config.

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

Test

Comments

analog input channel.

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—194

Table 25. Configuration Param eters.

Value of State

Digital State or

E-Vision (M, P, S)

Hardware Config.

Direct Access

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

Manual Config.

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

User Address NvName Field Name

nciDeviceName ASCII Blanks DeviceName is an 18 character field used to identify the node uniquely as

nciApplVer application_type 0 to 255 0 ApplicationType identifies the current application number of the Excel 10. nciApplVer version_no 0 to 255 0 VersionNumber identifies the version number of the Excel 10 application. nciApplVer time Seconds 0 The time stamp of the last change to the Excel 10 application

FanMode nciConfig FanMode AUTO_FAN

EconMode nciConfig EconEnable DIGITAL_IN

SmkCtlMode nciConfig SmokeControl FAN_OFF_DAMPER_CLOSED

HeatCycHr nciConfig ubHeatCph 2 to 12 6 P X X HeatCph specifies the mid-load number of on/off cycles per hour when the

CoolCycHr nciConfig ubCoolCph 2 to 12 3 P X X CoolCph specifies the mid-load number of on/off cycles per hour when the

FanRunOnCool nciConfig ubFanRunonCoolS0 Seconds

FanRunOnHeat nciConfig ubFanRunonHeatS0 Seconds

Engineering Units: English

(Metric) or States plus Range

CONTINUOUS_FAN

OD_TEMP OD_ENTH_A_TYPE OD_ENTH_B_TYPE OD_ENTH_C_TYPE OD_ENTH_D_TYPE DIFF_TEMP SINGLE_ENTH DIFF_ENTH ECON_NUL

FAN_ON_DAMPER_OPEN FAN_ON_DAMPER_CLOSED

0 to 120

Default

01AUTO_FAN P X X FanMode specifies the operation of the fan. If the FanMo de is 0

ECON_NUL P X X EconEnable specifies the method used to dete rmi ne whe n outs ide air is 1 2 3 4 5 6 7 8 255

FAN_OFF_DAMPER_ 1

CLOSED 2

0 P X X FanRunonCool specifies how long the fan runs after all the cooling stages

0 P X X FanRunonHeat specifies how long the fan runs after all the heating stages

Map

P X X SmokeControl specifies the operation of the economizer damper and the

NOTE: Physical I/O points that are configurable are in Table 20.

Test

Comments

one object at the site or project. The contents of the DeviceName is maintain ed b y a m ana geme nt node . I f Dev ice Name is all ASC II bla nks , it is considered unconfigured.

configuration. Time meets the ANSI C time stamp requirement specifying the number o f s ec o nds el a p se d si n ce m i dn i gh t ( 0: 0 0: 0 0) , J a nu ar y 1 , 19 7 0. It is represented in the Intel Format.

(AUTO_FAN), then the fan cycles on and off with demand for cooling and may cycle with heating if FanOnHeat is TRUE. If the FanMode is 1 (CONTINUOUS_FAN), then the fan runs continuously when the effective occupancy is OC_OCCUPIED or OC_BYPASS. The fan cycles on and off with demand for cooling and may cycle with heating if FanOnHeat is TRUE during the OC_UNOCCUPIED or OC_STANDBY modes.

suitable for use to augment cooling. The valid values are according to the enumerated list that is shown in the Engineering Units/States column.

fan when the mode is SMOKE_EMERGENCY.

mode is HEAT. In addition the cycle rate specifies the minimum on and off time. Refer to Table 17 Interstage Minimum Times of the System Engineering Guide for the actual valu es .

mode is COOL . In ad d i ti on t h e c yc l e ra t e s pe c i fie s th e m i ni m um on an d o ff time. Refer to Table 17 Interstage Minimum Times of the System Engineering Guide for the actual valu es .

have turned off. The fan is turned off FanRunonCool seconds after all the cooling demand has turned off.

have turned off. The fan is turned off FanRunonHeat seconds after all the heating demand has turned off.

Table 25. Configuration Parameters. (Con tinued)

Digital State or

Value of State

E-Vision (M, P, S)

Direct Access

Hardware Config.

Manual Config.

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

User Address NvName Field Name

EconMtrSpd nciConfig ubEconMtrTimeS0 Seconds

CoolMtrSpd nciConfig ubCoolMtrTimeS0 Seconds

HeatMtrSpd nciConfig ubHeatMtrTimeS0 Seconds

FanFailTime nciConfig ubFanFailTimeS0 Seconds

95 74-2958—1

RmTempCal nciConfig siSpaceTempZeroCalS7 Degrees F

TempOffstCal1 nciConfig siResistiveOffsetCalS7[0] Degrees F

TempOffstCal2 nciConfig siResistiveOffsetCalS7[1] Degrees F

VoltOffstCal1 nciConfig siVoltageOffsetCalS12[0] volts

VoltOffstCal2 nciConfig siVoltageOffsetCalS12[1] volts

FanOnHtMode nciConfig FanOnHeat FALSE

Engineering Units: English

(Metric) or States plus Range

20 to 240

1 to 255

-5 to 5 (-3 to 3)

-15 to 15 (-9 to 9)

-1 to 1

TRUE

Map

Default

90 P X X EconMtrTime specifies how long it takes the economizer damper motor to

90 P X X CoolMtrTime specifies how long it takes the cooling damper or valve motor

90 P X X HeatMtrTime s pec ifi es how lon g it ta kes th e he atin g da mper or val ve mot or

10 P X X Each time FAN_OUT is energized, then the node waits for FanFailTime

0 X X SpaceTempZeroCal provid es of fset ca libr atio n for th e space analo g senso r

0 ResistiveOffsetCal[0] provides offset calibration for the resistive analog

0 ResistiveOffsetCal[1] provides offset calibration for the resistive analog

0 VoltageOffsetCal[0] provides offset calibration for the voltag e/cu rre nt

0 VoltageOffsetCal[1] provides offset calibration for the voltag e/cu rre nt

01TRUE P X X FanOnHeat specifies the operation of the fan during HEAT mode. If

NOTE: Physical I/O points that are configurable are in Table 20.

Test

Comments

travel from fully closed to fully open. This time is used to calculate the reported position of the damper and to determine the length of over drive time required to assure the damper is fully closed or open.

to travel from fully closed to fully open. This time is used to calculate the reported position of the cooling damper or valve and to determine the length of over drive time required to assure that it is fully closed or open.

to travel from fully closed to fully open. This time is used to calculate the reported position of the heating damper or valve and to determine the length of over drive time required to assure that it is fully closed or open.

seconds to sample the ProofAirFlow input. If ProofAirFlow shows that the fan is not running for FanFailTime consecutive seconds, then the control is shut down for the minimum off time. Then the control (including the fan) is restarted and ProofAirFlow is again tested. If ProofAirFlow shows air flow, then the control continues to operate, but if ProofAirFlow fails to show air flow, then the control is again shut down for the minimum off time. After three unsuccessful restarts, a LOSS_OF_AIR_FLOW alarm is issued and the control stays in the DISABLED mode with the FAN_OUT off.

input and is added to the sensed value. The range of SpaceTempZeroCal is between -5 and 5 degrees F.

sensor input and is added to the sensed value. The range of ResistiveOffsetCal[0] is between -15 and 15 degrees F.

sensor input and is added to the sensed value. The range of ResistiveOffsetCal[1] is between -15 and 15 degrees F.

analog sensor input and is added to the sensed value. The current analog sensor is converted to a voltage by a 249 ohm resister wired across the input terminals. The range of VoltageOffsetCal[0] is between -1 and 1 volt. Voltage offsets are new in engineering units (not volts).

analog sensor input and is added to the sensed value. The current analog sensor is converted to a voltage by a 249 ohm resister wired across the input terminals. The range of VoltageOffsetCal[1] is between -1 and 1 volt. Voltage offsets are new in engineering units (not volts).

FanOnHeat is 1(TRUE), then the fan is on when the mode is HEAT. If FanOnHeat is a 0 (FALSE) the fan is never turned on when the mode is HEAT, and typically a thermostatically controlled switch sensing heated air temperature turns on the fan.

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—196

Table 25. Configuration Parameters. (Con tinued)

Digital State or

Value of State

E-Vision (M, P, S)

Direct Access

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

Hardware Config.

Manual Config.

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

User Address NvName Field Name

DisMinHtTime nciConfig DisableHeatMinTime FALSE

DisMinClTime nciConfig DisableCoolMinTime FALSE

CascCntrl nciConfig CascadeControl FALSE

UseRaTempCtl nciConfig ControlUsesRtnAirTemp FALSE

IaqUseHeat nciConfig IaqUseHeat FALSE

Engineering Units: English

(Metric) or States plus Range

TRUE

Map

Default

01FALSE P X X If DisableHeatMinTime is 0 (FALSE), the heating stages are on or off for a

01FALSE P X X If DisableCoolMinTime is 0 (FALSE), the cooling stages are on or off for a

01FALSE P X X When CascadeControl is 0 (FALSE), then the discharge air temperature is

01FALSE P X X If ControlUsesRtnAirTemp is a 0 (FALSE), then Data2.SpaceTemp is set

01FALSE P X X Wh en the effective occ upa ncy is OC_OCCUPIED and IaqUseHe at is 0

NOTE: Physical I/O points that are configurable are in Table 20.

Test

Comments

minimum time determined by ubHeatCph (Refer to Table 17 Interstage Minimum T im es of t he S yst em En gin eer in g Gui de) . If D isa ble Hea tMi nT im e is 1 (TRUE), the heating stages are on or off for a 30 second minimum time.

minimum time determined by CoolCph (Refer to Table 17 Interstage Minimum Times of the Sys te m E ng i ne e ri n g Gu i d e) . I f D i s ab leC oo l Mi n Time is 1 (TRUE), the cooling stages are on or off for a 30 second minimum time.

not directly controlled and heating and cooling equipment are modulated to maintain space temperature. When CascadeControl is 1 (TRUE), then the discharge air temperature is controlled by an additional control loop based on the error signal from the space temperature control loop. Cascade Control is applicable to modulating heating/cooling only (not staged).

equal either the space temperatu re sens or (IO. siS pac eTemp) or SpaceTemp depending on the value of SpaceTemp. When ControlUsesRtnAirTemp is 1 (TRUE) and SpaceTemp is SI_INVALID, then Data2.SpaceTemp is set equal to return air sensor (IO.ReturnTemp) and the control uses the return air sensor to control heating or cooling. When ControlUsesRtnAirTemp is 1 (TRUE) and SpaceTemp is not SI_INVALID, then Data2.siSpaceTemp is set equal to SpaceTemp and the control uses SpaceTemp to control heating or cooling.

(FALSE), then no heating stages or modulating heating are turned when the discharge air temperature goes below the low limit. Energy has priority over ventilation. When the effective occupa ncy is OC_OCCUPIED and IaqUseHeat is 1 (TRUE), then the heating stages or modulating heating are turned on to prevent the discharge air temperature from going below the discharge air temperature low limit. Ventilation has priority over energy cost.

Table 25. Configuration Parameters. (Con tinued)

Digital State or

Value of State

E-Vision (M, P, S)

Direct Access

Hardware Config.

Manual Config.

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

User Address NvName Field Name

OvrdPriority nciConfig OverridePriority LAST

UseWallModStpt nciConfig UseWallModStPt FALSE

SetPtKnob nciConfig SetPntKnob OFFSET

97 74-2958—1

OvrdType nciConfig OverrideType NONE

Engineering Units: English

(Metric) or States plus Range

NET

TRUE

ABSOLUTE_MIDDLE

NORMAL BYPASS_ONLY

Map

Default

01NET P X X OverridePriority configures the override arbitration between ManOcc,

01TRUE P X X UseWallModStpt specifies the OC_OCCUPIED temperature setpoint

01ABSOLUTE_MIDDLE P X X SetPntKnob specifies the usage of the setpoint knob when

NORMAL P X X OverrideType specifies the behavior of the override button. If the

0 1 2

NOTE: Physical I/O points that are configurable are in Table 20.

Test

Comments

Bypass.state, and the wall module override button. If OverridePriority is 0 (LAST), then the last command received from either the wall module or iManOcc determines the effective override state. If OverridePriority is 1 (NET), this specifies that when ManOcc is not OC_NUL, that the effective occupancy is ManOcc regardless of the wall module override state.

source. If UseWallModStpt is 0 (FALSE), then the occupied TempSetPts are used when the effective occupancy is OC_OCCUPIED. If UseWallModStpt is 1 (TRUE), then the wall modules setpoint knob is used when the effective occupancy is OC_OCCUPIED. SetPt overrides all.

UseWallModStPt is TRUE. When SetPntKnob is 0 (ABSOLUTE_MIDDLE), the setpoint knob directly determines the center point of between the OC_OCCUPIED cooling and heating setpoints. When SetPntKnob is 1 (OFFSET), the effective setpoint is calculated by adding the remote setpoint potentiometer value (center scale = 0) to the appropriate value of TempSetPts.

OverrideType is 0 (NONE) then the override button is disabled. An OverrideType of 1 (NORMAL), causes the override button to set the OverRide state to OC_BYPASS for Aux2SetPt.BypassTime seconds when the override button has been pressed for approximately 1 to 4 seconds, or to set the OverRide state to UNOCC when the button has been pressed for approximately 4 to 7 seconds. When the button is pressed longer than approximately 7 seconds, then the OverRide state is set to OC_NUL. If the Override T ype is 2 (BYP AS S_ONLY), the override button sets th e OverR ide state to OC_BYPASS for Aux2SetPt.BypassTime seconds on the first press. On the next press, the OverRide state is set to OC_NUL.

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

User Address NvName Field Name

nciNodeSendT (SNVT_time_sec)

nciRtuSendT (SNVT_time_sec)

nciRtuRcvT (SNVT_time_sec)

Table 26. LONM

Engineering Units: English

(Metric) or States plus Range

Seconds 0 The maximum time between updates of network variable outputs from the

Seconds 0 The SGPUC and SGPU time (heart beat time) between updates of network

Seconds 0 This is the failure detection time for network SGPUC and SGPU variables

®/Open System Points.

ARK

Digital State or

Value of State

Default

E-Vision (M, P, S)

Map

Hardware Config.

Manual Config.

Direct Access

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

Failure Detect

Comments

node object.

variable outputs.NOTE: RtuSendT should be set to 55 seconds by a management node to be compatible with a Honeywell system.

outputs.NOTE: RtuRcvT should be set to 300 seconds by a management node to be compatible with a Honeywell system.

74-2958—198

User Address NvName Field Name

CoolOccSpt nciTempSetPts

CoolStbySpt nciTempSetPts

CoolUnoccSpt nciTempSetPts

HeatOccSpt nciTempSetPts

HeatStbySpt nciTempSetPts

HeatUnoccSpt nciTempSetPts

(SNVT_temp_setpt)

nviRequest (SNVT_obj_request)

occupied_cool Degrees F

standby_cool Degrees F

unoccupied_cool Degrees F

occupied_heat Degrees F

standby_heat Degrees F

unoccupied_heat Degrees F

object_id 0 to 65535 1 Request provides the mechanism to request a particular status report (via

object_request RQ_NORMAL

Table 26. L

Engineering Units: English

(Metric) or States plus Range

50 to 95 Degrees C (10 to 35)

RQ_DISABLED RQ_UPDATE_STATUS RQ_SELF_TEST RQ_UPDATE_ALARM RQ_REPORT_MASK RQ_OVERRIDE RQ_ENABLE RQ_RMV_OVERRIDE RQ_CLEAR_STATUS RQ_CLEAR_ALARM RQ_NUL

ONMARK

®/Open System Points. (Continued)

Digital State or

Value of State

E-Vision (M, P, S)

Default

23 P, MX X The Cooling Occupied Setpoint is used if no wall module setpoint pot is

25 P, MX X When the controller is in the Standby mode (typically via an occupancy

28 P, MX X When the controller is in the Unoccupied mode, the unit responds to a call

21 P, MX X When the controller is in the Occupied mode, if the space temperature

19 P, MX X When the controller is in the Standby mode (typically via an occupancy

16 P, MX X When the controller is in the Unoccupied mode, the unit responds to a call

RQ_NORMAL When object_request is RQ_NORMAL or RQ_UPDATE_STATUS then the 1 2 3 4 5 6 7 8 9 10 255

Hardware Config.

Manual Config.

Direct Access

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

Failure Detect

Map

Comments

configured as the standard Occupied Cooling Setpoint. Actual Cooling Setpoint can be affected by various control parameters (such as DlcShed, SrcRmtTempSpt, etc.). Actual room temperature Setpoint is reflected in RmTempActSpt. Overridden by nviSetPt. Used to compute ZEB.

sensor), the base Cooling Setpoint is determined by the Cooling Standby Setpoint value. Also, when a wall module setpoint pot is configured, this value serves as the upper limit on the user adjustable remote setpoint pot (wall module).

for cooling based on the Cooling Unoccupied Setpoint.

drops below the Heating Occupied Setpoint, the unit switches to the Heating mode. This Setpoint is used only when there is no wall module setpoint pot configured. Overridden by nviSetPt. Used to compute ZEB.

sensor), the base Heating Setpoint is determined by the Heating Standby Setpoint value. Also, when a wall module setpoint pot is configured, this value serves as the lower limit on the user adjustable remote setpoint pot (wall module).

for heating based on the Heat ing Unoccupied Setpoint.

Status) for a particular object within this node. Object_id selects the object being referenced by nviRequest. The only valid value of object_id is 1 for the RTU object and all others are invalid.

status (via Status) will be reported for the object addressed by object_id. When object_request is RQ_REPORT_MASK then the status bits will be reported that are supported in nvoStatus by the object addressed by object_id. Bits that are supported by the object are set to one. All other object_request items are not supported at this time and will return an invalid_request (Status) in the obje ct stat us.

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

User Address NvName Field Name

DestHvacMode nviApplMode

DestManOcc nviManOcc

99 74-2958—1

DestRmTempSpt nviSetPoint

DestSptOffset nviSetPtOffset

SrcRmTempActSpt nvoEffectSetPt

(SNVT_hvac_mode)

(SNVT_occupancy)

(SNVT_temp_p)

Table 26. L

Engineering Units: English

(Metric) or States plus Range

HVAC_AUTO HVAC_HEAT HVAC_MRNG_WRMUP HVAC_COOL HVAC_NIGHT_PURGE HVAC_PRE_COOL HVAC_OFF HVAC_TEST HVAC_EMERG_HEAT HVAC_FAN_ONLY HVAC_NUL

OC_OCCUPIED OC_UNOCCUPIED OC_BYPASS OC_STANDBY OC_NUL

Degrees F 50 to 95 Degrees C (10 to 35)

Degrees F

-18 to 18 Degrees C

-10 to 10

Degrees F 50 to 95 Degrees C (10 to 35)

ONMARK

®/Open System Points. (Continued)

Digital State or

Value of State

E-Vision (M, P, S)

Default

HVAC_AUTO M X X X X X ApplMode is an input that coordinates the roof top unit controller operation 1 2 3 4 5 6 7 8 9 255

OC_NUL X X X ManOcc is an input from a network connected operator interface or other 1 2 3 255

SI_INVALID X X X SetPoint is an input network variable used to determine the temperature

0 X X X X SetPtOffset is input from an operator terminal or from an energy

SI_INVALID X X EffectSetPt is the current temperature control point (such that the current

Map

Hardware Config.

Direct Access

Manual Config.

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

Failure Detect

Comments

with other controllers. HVAC_NIGHT_PURGE HVAC_PRE_COOL HVAC_MRNG_WRMUP HVAC_NUL HV AC _T ES T a r e no t s u pp or t e d an d w i ll de f a ul t t o t h e HVAC_AUTO s e tti n g if received.

node that indicates the state of a manual occupancy control thus over riding the scheduled occupancy state. ManOcc is used along with other occupancy inputs to calculate the effective occupancy of the node. See the Data1.EffectOcc and Data1.Ne tMa nO cc for mor e deta ils.T he val id enumerated values have the following meanings: OC_OCCUPIED indicates occupied. OC_UNOCCUPIED indicates not occupied. OC_BYPASS indicates that the space is occupied for Aux2SetPt.BypassTime seconds after ManOcc is first set to OC_BYPASS. The timing is done by the bypass timer in this node. If ManOcc changes to another value the timer is stopped.OC_STANDBY indicates that the space is in standby mode.OC_NUL and all unspecified values means that no manual occupancy control is requested. When ManOcc changes from OC_OCCUPIED, OC_UNOCCUPIED, OC_BYPASS, or OC_STANDBY to OC_NUL, any bypass condition is canceled.

control point of the node. If SetPoint is not SI_INVALID, then it is used to determine the control point of the node. If SetPoint is SI_INVALID, then other means are used to determine the control point. See Data2.TempControlPt for more information.

management system used to shift the effective temperature setpoint by adding SetPtOffset to the otherwise calculated setpoint. If the value is outside the allowed range of -10 to +10 degrees C (-18 to 18 degrees F), then the node uses the value of the nearest range limit.

actual space temperature setpoint which the controller is presently trying to maintain in the conditioned space). See Data2.TempControlPt for more details. EffectSetPt is updated according to the SGPU mechanism where a significant change is plus or minus 0.07 degrees C (0.13 degrees F).

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

74-2958—1 100

User Address NvName Field Name

DestRmTemp nviSpaceTemp

SrcRmTemp nvoSpaceTemp

DestOaTemp nviOdTemp

SrcOaTemp nvoOdTemp

DestOaHum nviOdHum

SrcOaHum nvoOdHum

(SNVT_temp_p)

(SNVT_lev_percent)

Table 26. L

Engineering Units: English

(Metric) or States plus Range

Degrees F 14 to 122 Degrees C (-10 to 50)

Degrees F

-40 to 122 Degrees C (-40 to 50)

Degrees F

-40 to 122 Degrees C (-40 to 50)

Percentage 10 to 90

ONMARK

®/Open System Points. (Continued)

Digital State or

Value of State

E-Vision (M, P, S)

Default

SI_INVALID X X X X SpaceTemp is the space temperature sensed by another node and is

SI_INVALID X X SpaceTemp is the sensed space temperature from the locally wired sensor.

SI_INVALID M X X X X OdTemp allows one outside air temperature sensor at a node to be shared

SI_INVALID M X X OdTemp allows the local outdoor temperature sensor to be shared with

SI_INVALID M X X X X OdHum allows one outdoor humidity sensor at a node to be shared by

SI_INVALID M X X OdHum allows the local outdoor humidity sensor to be shared with other

Hardware Config.

Manual Config.

Direct Access

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

Failure Detect

Map

Comments

typically bound to SpaceT emp of another node having a space temperature sensor. If SpaceTemp has a value other than SI_INVALID it is used as the sensed space temperature by the node rather than using any local hardwired sensor. If the value is outside the allowed range of -10 to 50 degrees C (-18 to 90 degrees F), then the node uses the value of the nearest range limit. When SpaceTemp is not bound to another node, SpaceTemp may be used to fix the sensed temperature. A management node may write a value other than SI_INVALID, causing the node to use SpaceTemp instead of the hard-wired sensor. An application restart or power failure causes the fixed sensor value to be forgotten and SpaceTemp to be returned to SI_INVALID.

SpaceTemp is typically bound to SpaceTemp of another node which may not have its own space temperature sensor but control the same space. The reported space temperature includes the offset correctio n Config.SpaceTempZeroCal. If the space temperature sensor is not connected or is shorted, or if SpaceTemp is bound to another node, then SpaceTemp is set to SI_INVALID.

by many other nodes. When OdTemp is not SI_INVALID, then any local sensor is ignored by the local control algorithm and OdTemp is used instead. If the value is outside the allowed range of -40 to 50 degrees C (72 to 90 degrees F), then the node uses the value of the nearest range limit.

other nodes and is typically bound to OdTemp on other nodes. If the local sensor is configured by Select, OdTemp is periodically sent on the network. If the local sensor is not configured or currently showing an error, the value is SI_INVALID.

many other nodes. When nviOdHum is not SI_INVALID, then the local sensor, is ignored by the local control algorithm and OdHum is used instead. If the value is outside the allowed range (10 to 90 percent), then the node uses the value of the nearest range limit.

nodes and is typically bound to OdHum on other nodes. If the local sensor is configured by Select, OdHum is periodically sent on the network. If the local sensor is not configured or currently showing an error, the value is SI_INVALID.

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

Honeywell W7750A User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Contents

List of Figures

List of Tables

INTRODUCTION

Description of Devices

Control Application

Control Provide d

Products Covered

Organization of Manual

Applicable Literature

Product Names

Agency Listings

Abbreviations and Definitions

Construction

Controllers

PERFORMANCE SPECIFICATIONS

Inputs/Outputs:

ANALOG INPUTS:

TRIAC OUTPUTS ON THE (W7750B,C MODELS ONLY):

DIGITAL INPUTS:

DIGITAL OUTPUTS:

Wall Modules

Duct Sensor

Configurations

General

Allowable Heating and Cooling Equipment Configurations

STAGED HEATING/COOLING CONTROL

MODULATING HEATING/COOLING CONTROL

HEAT PUMP CONTROL

ECONOMIZER CONTROL

PNEUMATIC ACTUATOR CONTROL

MIXED-OUTPUT-TYPE CONTROL

Occupancy Sensor

Window Open/Closed Digital Input

Wall Module Options

Dirty Filter Monitor

Indoor Air Quality (IAQ) Override

Smoke Control

Freeze Stat

Modes of Operation

APPLICATION STEPS

Overview

Step 1. Plan the System

Step 2. Determine Other Bus Devices Required

Step 3. Lay Out Communications and Power Wiring

Power Wiring

POWER BUDGET CALCULATION EXAMPLE

LINE LOSS

Step 4. Prepare Wiring Diagrams

General Considerations

W7750 Controller s

FACTORY DEFAULT DIGITAL OUTPUTS:

Step 5. Order Equipment

Step 6. Configure Controllers

Step 7. Troubleshooting

Troubleshooting Excel 10 Controllers and Wall Modules

Temperature Sensor and Setpoint Potentiometer Resistance Ranges

Alarms

Broadcasting the Service Message

W7750 Controller Status LED

T7770C,D Wall Module Bypass Pushbutton and Override LED

APPENDICES

T7560A,B Digital Wall Module Bypass Pushbutton and LCD Display Occupancy Symbols

Appendix A. Using E-Vision to Commission a W7750 Controller.

Sensor Calibration

Setting the Pid Parameters

Appendix B. Sequences of Operation.

Common Operations

ROOM TEMPERATURE SENSOR (RmTemp)

REMOTE SETPOINT (RmtStptPot)

SETPOINT LIMITS (LoSetptLim AND HiSetptLim)

BYPASS MODE (StatusOvrd AND StatusLed )

BypassTime

OverrideType

OverridePriority

CYCLES PER HOUR (ubHeatCph AND ubCoolCph)