Honeywell W7750A User Manual

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

+ 86 hidden pages

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