Honeywell W7762A, W7762B SYSTEM ENGINEERING

935

W7762A,B HYDRONIC CONTROLLERS

HONEYWELL EXCEL 5000 OPEN SYSTEM

Excel 10

SYSTEM ENGINEERING

CONTENTS

Revision overview ........................................................................................................................................................................ 2

Introduction .................................................................................................................................................................................. 3

Description of Devices ................................................................................................ 3

Products Covered ....................................................................................................... 4

Organization of Manual ............................................................................................... 4

Applicable Literature ................................................................................................... 4

Product Names ........................................................................................................... 4

Control Application...................................................................................................... 5

Control Provided ......................................................................................................... 5

Setpoints.......................................................................................................... 6

Bypass............................................................................................................. 7

LED/LCD ......................................................................................................... 7

Energy-Saving Features .................................................................................. 7

Occupancy Status............................................................................................ 8

Operating Modes ............................................................................................. 9

Agency Listings........................................................................................................... 9

Design....................................................................................................................... 10

Controller Performance Specifications ...................................................................... 11

Configurations........................................................................................................... 12

General.......................................................................................................... 12

Fan Interlock (not available through E-Vision) ............................................... 12

Type of Heating and Cooling Equipment ....................................................... 12

Digital Input.................................................................................................... 13

Excel 10 Wall Module Options ....................................................................... 14

Abbreviations and Definitions.................................................................................... 15

Overview................................................................................................................... 16

Step 1. Plan The System .......................................................................................... 16

Application Steps ....................................................................................................................................................................... 16

Step 2. Determine Other Bus Devices Required....................................................... 16

Step 3. Lay Out Communications and Power Wiring ................................................ 17

E-Bus Layout ................................................................................................. 17

Power Wiring ................................................................................................. 19

Step 4. Prepare Wiring Diagrams ............................................................................. 20

General Considerations ................................................................................. 20

W7762 Controller........................................................................................... 21

E-Bus Termination Module ............................................................................ 22

Step 5. Order Equipment .......................................................................................... 23

Step 6. Configure Controllers.................................................................................... 24

General.......................................................................................................... 24

Outputs .......................................................................................................... 25

Inputs............................................................................................................. 26

Equipment Control ......................................................................................... 27

Switching Levels ............................................................................................ 27

Zone Options ................................................................................................. 28

Miscellaneous ................................................................................................ 28

PID................................................................................................................. 28

Commissioning .............................................................................................. 29

ID Number ..................................................................................................... 29

Excel 10 Hydronic Controller Point Mapping.................................................. 29

Step 7. Troubleshooting............................................................................................ 31

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EXCEL10 HYDRONIC CONTROLLER SYSTEM ENGINEERING

Troubleshooting Excel 10 Hydronic Controllers and Wall Modules.................31

Alarms ............................................................................................................31

Broadcasting the Service Message ................................................................33

W7762 Controller Status LED ........................................................................33

Manual Mode..................................................................................................33

Appendix A. Using E-Vision to Commission a Hydronic Controller.......................................................................................34

Temperature Sensor Calibration................................................................................34

Procedure.......................................................................................................34

Appendix B. Configuring for Master/Slave Operation..............................................................................................................35

Output Configuration Options ....................................................................................35

Input Configuration Options .......................................................................................35

Equipment Control Options........................................................................................35

Zone Control Options.................................................................................................35

Network Variable Binding...........................................................................................35

Appendix C. Complete List of Excel 10 Hydronic Controller User Addresses. .....................................................................36

Appendix D. Q7750A Excel 10 Zone Manager Point Estimating Guide. .................................................................................74

Approximate Memory Size Estimating Procedure......................................................74

REVISION OVERVIEW

On the following pages, changes have been made compared to the previous release of this document:

Page: Change:

App. C Minor corrections in Appendix C

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EXCEL 10 HYDRONIC CONTROLLER SYSTEM ENGINEERING

INTRODUCTION

Description of Devices

The W7762A and B Controllers are two Hydronic Controllers in the Excel 10 family product line. They cover a wide range of control applications including radiators, induction units, and fan coil units with manual fan switching, and are suitable for either wall mounting or unit mounting. Heating systems can be water or electric, and cooling systems can be chilled water supply or compressors. Extensive timing and interlock features make the W7762 especially suitable for systems using electric heat and compressors. The W7762 Controllers are capable of stand-alone operation; however, optimum functional benefits are achieved when the network communication capabilities are used.

PERSONAL COMPUTER TOOLS

E-VISION

E-BUS COMMUNICATIONS NETWORK

Q7752A E-BUS SERIAL ADAPTER

EXCEL 10 Q7750A ZONE MANAGER

The zone controlled by the W7762 Controllers will typically use an Excel 10 wall module with a temperature sensor for space temperature measurement, analog setpoint input, bypass digital input push-button, and override status LED. See page 4 for form numbers of Excel 10 wall module literature for further information.

The Q7750A Excel 10 Zone Manager is a communications interface that allows devices on the Excel 10 Echelon L

ONWORKS

the EXCEL 5000

network (E-Bus) to communicate with devices on

System C-Bus. Fig. 1 shows an overview

of a typical system layout. The Q7750A also provides some control and monitoring functions.

C-BUS COMMUN ICATION N ETWORK

EXCEL 500

C-BUS TO E-BUS INTERFACE DEVICE

EXCEL BUILDING SUPERVISOR

E-BUS COMMUN ICATI ONS N ETWOR K

EXCEL 10 HYDRONIC CONTROLLER

Q7751A E-BUS ROUTER

Fig. 1. Typical system overview

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EXCEL10 HYDRONIC CONTROLLER SYSTEM ENGINEERING

Products Covered

This System Engineering Guide describes how to apply the Excel 10 Hydronic Controller and the accessories to typical Hydronic applications. The specific devices covered include:

• W7762A,B Hydronic Controllers.

• T7460 Wall Modules.

• T7560 Wall Modules.

• T7770 Wall Modules.

• Q7750A Excel 10 Zone Manager.

• Q7751A Bus Router (US part number; US only).

• Q7752A Serial Adapter (US part number; US only).

Organization of Manual

The Introduction and Application Steps 1 through 5 provide the information needed to make accurate ordering decisions. Application Step 6 and the Appendices include configuration engineering that can be started using E-Vision software after the devices and accessories are ordered. Application Step 7 is troubleshooting. Information provided in support of the use of third-party E-bus communication packages to configure Hydronic Controllers is found in the Appendices.

The organization of the manual assumes a project is being engineered from start to finish. If you are adding to, or changing an existing system, the Table of Contents can guide you to the relevant information.

Applicable Literature

The following is a list of documents that contains information related to the Excel 10 Hydronic Controller and the EXCEL 5000 System in general.

Form No. Title

74-2934 Excel 10 W7762A,B Hydronic Controller

Specification Data

95-7563 Excel 10 W7762A,B Hydronic Controller

Installation Instructions

74-3083 Excel 10 T7460 Wall Modules Specification

Data

95-7610 Excel 10 T7460 Wall Modules Installation

Instructions

74-3097 Excel 10 T7560 Wall Modules Specification

Data

95-7620 Excel 10 T7560 Wall Modules Installation

Instructions

74-2697 Excel 10 T7770 Wall Modules Specification

Data

95-7538 Excel 10 T7770 Wall Modules Installation

Instructions

74-2950 Excel 10 Q7750A, Excel 10 Zone Manager

Specification Data

95-7509 Excel 10 Q7750A Zone Manager Installation

Instructions.

95-7554 Excel 10 FTT/LPT 209541B Termination

Module Installation Instructions

95-7510 Excel 10 Q7751A Router Installation

95-7511 Excel 10 Q7752A Serial Interface Installation

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

Product Names

The W7762 Hydronic Controller can use any of the following Excel 10 wall modules:

• T7460A with temperature sensor.

• T7460B with temperature sensor and setpoint adjustment.

• T7460C with temperature sensor, setpoint adjustment, and

bypass button and LED.

• T7560A with temperature sensor, unit enable button,

setpoint adjustment, bypass button, LCD display and configurable fan override with up to five settings.

• T7770A Wall Module with temperature sensor and optional

E-Bus jack.

• T7770B Wall Module with temperature sensor, setpoint

adjustment, and E-Bus jack.

• T7770C Wall Module with temperature sensor, setpoint

adjustment, bypass button and LED, and E-Bus jack.

• T7770D Wall Module with temperature sensor, bypass

button and LED, and E-Bus jack.

Other products:

• Q7750A Excel 10 Zone Manager.

• Q7751A Bus Router (US only).

• Q7752A Serial Adapter (US only).

• AK3781 E-Bus (non-plenum): 22 AWG (0.325 mm

twisted pair solid conductor, non-shielded wire (one twisted pair) (US only).

• AK3782 E-Bus (non-plenum): 22 AWG (0.325 mm

twisted pair solid conductor, non-shielded wire (two twisted pairs) (US only).

• AK3791 E-Bus (plenum): 22 AWG (0.325 mm

pair solid conductor, non-shielded wire (one twisted pair) (US only).

• AK3792 E-Bus (plenum): 22 AWG (0.325 mm

pair solid conductor, non-shielded wire (two twisted pairs) (US only).

• C7608A Return Air Sensor (Europe only). Refer to the Table 12 (see Application Steps, Step 5. Order Equipment) for complete listing of all available part numbers.

Instructions (US only)

)

) twisted

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Control Application

Hydronic systems in commercial buildings control room temperature through the control of heat and/or cold water valves. The Hydronic controller is typically connected to an Excel 10 wall module that incorporates a temperature sensor,

W7762B HYDRONIC

CONTROLLER

Fig. 2. Typical W7762 Hydronic control application.

Control Provided

The W7762 Hydronic Controllers provide room temperature control for two and four pipe fan coil units. The basic control sequence is shown in Fig. 3. As space temperature falls below the heating setpoint, the heating output is increased. As space temperature increases above the cooling setpoint, the cooling output is modulated to 100%. Switching levels for staged heating/cooling are configurable.

setpoint and a bypass or override button. Fig. 2 shows a typical Hydronic control application.

WINDOW

CONTACT

WALL MODULE

WITH TEMP

SENSOR

E-BUSE-BUS

W7762 Hydronic controllers use a PID control algorithm where each of the three parameters can be configured. There are additional configurable boost parameters (HeatBoost and CoolBoost) that specify a range outside of which the heating or cooling outputs are turned on fully for faster response (for thermal actuators this specifies the control hysteresis). The controllers are delivered with factory defaults for each of the parameters.

Fig. 3. Control sequence diagram.

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Setpoints

Setpoint Knob

W7762A Hydronic controllers have a built-in setpoint potentiometer. W7762B controllers may have an Excel 10 wall module with setpoint potentiometer connected to them. When configured (UseWallModSpt), the value from the setpoint knob is used to calculate the cooling or heating Occupied setpoint. There are two options (SptKnob) that determine how the setpoint to be used by the control algorithm is calculated: Relative (or Offset) and Absolute Middle. When configured for Relative, the Wall Module setpoint knob represents a number from -5° to +5°C (-9° to +9°F) that is added to the software occupied setpoints for the heat and the cool modes (SptCoolOcc and SptHeatOcc). When SptKnob is set to Absolute Middle, the setpoint knob becomes the center of the Zero Energy Band (ZEB) between the cooling and heating occupied setpoints. The range of the ZEB is found by taking the difference between the configured heating and cooling occupied setpoints; therefore, for Absolute Middle, the actual setpoints are found as follows:

SrcRmTempSptEff (in cooling mode) = SrcRmTempSptHw

+ (SptCoolOcc - SptHeatOcc) / 2

SrcRmTempSptEff (in heating mode) = SrcRmTempSptHw

- (SptCoolOcc - SptHeatOcc) / 2

During Standby and Unoccupied modes, the remote setpoint knob is ignored, and the configured setpoints for those modes

Setpoint Limits

Setpoint knob limits are provided by SptKnobLoLim and SptKnobHiLim. The occupied setpoints used in the control algorithms are limited by these parameters. When the setpoint knob is configured to be Absolute Middle, the lowest actual setpoint allowed is equal to SptKnobLoLim, and the highest actual setpoint allowed is equal to SptKnobHiLim. When the setpoint knob is configured to be Relative, the lowest actual setpoint allowed is equal to SptHeatOcc SptKnobLoLim, and the highest allowed is equal to SptCoolOcc + SptKnobHiLim.

Setpoint from Network

When not configured for UseWallModSpt, DestRmTempSpt must be bound to another node that provides a setpoint. When bound and a valid update is received, DestRmTempSpt is used with the appropriate ZEB:

ZEBoccupied = SptCoolOcc - SptHeatOcc ZEBstandby = SptCoolStby - SptHeatStby

The Unoccupied setpoint does not depend on DestRmTempSpt at all.

Setpoint Offset

Third party nodes may be bound to DestSptOffset to shift the setpoint in the range of -10 delta °C to +10 delta °C.

are used instead.

Table 1. Example setpoint values based upon default configuration - Absolute Middle setpoint knob (°C).

Occupancy Mode

Configured Cooling Spt.

Configured Heating Spt. ZEB

Setpoint

Knob

Effective Cooling Spt.

2,3

Effective Heating Spt.

2,4

Occupied 23 21 2 21 22 20

Standby 25 19 6 21 24 18

Unoccupied 28 16 12 X 28 16

NOTES:

1. Sample value shown. Limited by default configuration settings to the range of 12 to 30°C.

2. Limited to the range of 10 to 35°C.

3. = Setpoint Knob + (ZEB/2)

4. = Setpoint Knob – (ZEB/2)

Table 2. Example setpoint values based upon default configuration - Relative setpoint knob (°C).

Occupancy Mode

Configured Cooling Spt.

Configured Heating Spt. ZEB

Setpoint

Knob

Effective Cooling Spt.

2,3

Effective Heating Spt.

2,4

Occupied 23 21 2 -2 21 19

Standby 25 19 6 -2 23 17

Unoccupied 28 16 12 X 28 16

NOTES:

1. Sample value shown. Limited by default configuration settings to the range of -5 to 5°C.

2. Limited to the range of 10 to 35°C.

3. = Configured Cooling Setpoint + Setpoint Knob

4. = Configured Heating Setpoint + Setpoint Knob

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Bypass

Bypass Mode

During Unoccupied periods, the bypass push-button on the Wall Module may be used to cause the Occupied setpoints to be used by the control algorithm. The mode may also be initiated by setting DestManOcc to OC_BYPASS via the network The controller remains in Bypass mode until:

1. The bypass timer has timed out, or

2. The user again presses the Wall Module push-button to cancel Bypass mode, or

3. The occupancy schedule (DestSchedOcc network input) switches the mode to Occupied.

4. The network input DestManOcc is set to to OC_NUL.

The Excel 10 wall module indicates the current bypass mode status (see Excel 10 wall module literature for further information).

Bypass Timer

When the bypass mode has been activated, the bypass timer is set to BypTime (default of 180 minutes), at the end of which the mode reverts to the original occupancy state (see Excel 10 wall module literature for further information).

Continuous Unoccupied Mode

This mode is entered when an Excel 10 wall module is configured to allow it and:

• T7460 and T7770: The bypass button is pressed for four to

seven seconds (until the LED blinks),

• T7560: The bypass button is pressed for more than five

seconds (until flashing moon appears). This mode can also be entered via a network command (DestManOcc set to OC_UNOCCUPIED). The controller uses the Unoccupied setpoints. The controller remains in this mode indefinitely, or until the bypass button is pressed to exit the mode, or a network command is sent to clear the mode.

Bypass Push-Button

The Hydronic Controller may have an Excel 10 wall module with bypass push-button connected to it. There are three ways to configure the bypass push-button (see Table 14 for further information):

NONE

BYPASS_UNOCCUPIED

BYPASS_ONLY

Override Priority

The Hydronic controller can be configured to arbitrate overrides coming from the Wall Module and the network. There are two possible states that have the following meanings:

LAST_WINS-Specifies that the last command received

from either the wall module or DestManOcc determines the effective override state.

NETWORK_WINS-Specifies that when DestManOcc is not

OC_NUL, then the effective occupancy is DestManOcc regardless of the wall module override state.

LED/LCD

LED Override

The wall module’s LED shows the override from the bypass button or from the network.

• LED on ⇒ Override Bypass

• One flash per second ⇒ Override Unoccupied

• Two flashes per second ⇒ Override Standby or Occupied

• LED off ⇒ No Override

• Four flashes per second ⇒ Controller answers network

management wink command.

LED Occupancy

The wall module’s LED shows the effective occupancy mode.

• LED on ⇒ Effective Occupied or Bypass

• One flash per second ⇒ Effective Standby

• LED off ⇒ Effective Unoccupied

• Four flashes per second ⇒ Controller answers network

management wink command.

LCD Display

This mode is only used for T7560 Wall Modules. The occupancy mode is represented by the following symbols:

⇒ Effective Occupied or Bypass

⇒ Effective Standby

⇒ Effective Unoccupied

⇒ Controller is off

and ⇒ Controller is off, frost protection is enabled.

Flashing symbols represent the Override mode:

⇒ Override Occupied or Bypass

⇒ Override Standby

⇒ Override Unoccupied

⇒ Controller answers the network management wink

command.

Energy-Saving Features

Standby Mode

The digital input for an occupancy sensor (usually a motion detector) provides the controller with a means to enter an energy-saving Standby mode whenever there are no people in the room. Standby mode occurs when the scheduled occupancy is Occupied and the occupancy sensor indicates no people currently in the room. If no occupancy sensor is connected directly to the controller, an occupancy sensor from another node may be bound to the network input DestOccSensor. The controller can also be put in Standby mode by settin DestManOcc to OC_STANDBY via the network. When in Standby mode, the Hydronic Controller uses the Standby Cooling or Heating setpoint (SptCoolStby or SptHeatStby).

Window Sensor

The digital input for a window contact provides the algorithm with a means to disable its temperature control activities if someone has opened a window or door in the room. If no window sensor is connected to the controller, the sensor from another node may used by binding it to DestWindow. Frost protection remains active (controller enables heating circuit with room temperatures below 46°F (8°C)). Normal temperature control resumes when the window closes.

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Demand Limit Control

When a high-electrical-demand signal is received from an energy management system via the E-Bus network (DestDldShed), the controller uses DlcStptBump to shift the current setpoint (down for heating and up for cooling) by the configured value to save energy.

Fig. 4. Optimum start - heating.

Optimum Start Gradients

There are two parameters, RecRampCool and RecRampHeat, that can be configured to cause the cooling and heating setpoints respectively to ramp up to their Occupied settings from their Unoccupied or Standby settings prior to scheduled Occupancy. The Hydronic controller uses the configured rates to determine the optimum time to start increasing the heating or cooling demand. See the following figures. The configuration parameters are in K/hour.

Fig. 5. Optimum start - cooling.

Occupancy Status

The occupancy status is determined based upon the following table. Manual override may come from the network input DestManOcc or from the bypass push-button.

Table 3. Effective Occupancy Mode Arbitration

Scheduled occupancy mode Occupancy sensor status Manual override status Effective operating mode

Occupied Occupied Not assigned OC_OCCUPIED Occupied Not occupied Not assigned OC_STANDBY X X Occupied OC_OCCUPIED X X Unoccupied OC_UNOCCUPIED X X Standby OC_STANDBY Occupied X Bypass OC_OCCUPIED Standby X Not assigned OC_STANDBY Standby X Bypass OC_OCCUPIED Unoccupied X Not assigned OC_UNOCCUPIED Unoccupied X Bypass OC_BYPASS X=Don't care

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Operating Modes

The possible modes of operation are listed in Table 4.

Table 4. Modes of Operation for Excel 10 Hydronic Controller.

Mode Description Events Causing a Controller to Switch to This Mode

Operational Modes (User Address: SrcHydModeS)

START-UP AND WAIT

FLOATING OUTPUTS SYNCH

COOLING The Excel 10 Hydronic Controller is

HEATING The Excel 10 Hydronic Controller is

MANUAL No control algorithms are active.

FACTORY TEST Control algorithm is disabled; special

DISABLED Control algorithms are terminated,

Control algorithms are disabled. Outputs stay in their initial positions. Physical inputs are periodically read and digital filtering of analog inputs is turned off to speed up settling time. Network input variables are received and output variables are sent periodically.

The Hydronic Controller drives the floating control valves to their initial positions and then transitions to one of the control modes.

controlling in the Cooling mode.

controlling in the Heating mode.

Physical inputs are periodically read and digital filtering of analog inputs is turned off to speed up settling time. Network input variables are received and output variables are sent periodically Outputs may be turned on or off by settings in network input nviTest.

factory test program runs.

outputs are turned off (turn-off sequences and interlocks are active). Frost protection is disabled.

This is the first mode after an application restart.

When the effective occupancy changes to unoccupied or standby, after start-up or 24 hours have elapsed since the last start-up, the Hydronic Controller transitions to this mode..

Network input (DestHvacMode) has a value of HVAC_COOL or HVAC_AUTO and the space temperature is above the cooling setpoint.

Network input (DestHvacMode) has the value of HVAC_HEAT or HVAC_AUTO and the space temperature is below the heating setpoint..

Network input (DestManMode) has value of MODE_MANUAL.

This mode is for factory testing only.

Network input (DestManMode) has a value of MODE_DISABLED.

Agency Listings

Table 5 provides information on agency listings for Excel 10 Hydronic Controller products.

Table 5. Agency listings.

Device Agency Comments

W7762 Hydronic Controller CE General Immunity per European Consortium standards EN50081-1 (CISPR 22 Class

B) and EN 50082-1:1992 (based on Residential, Commercial, and Light Industrial). EN 61000-4-2 IEC 1000-4-2 (IEC 801-2) Electromagnetic Discharge. EN 50140, EN 50204 IEC 1000-4-3 (IEC 801-3) Radiated Electromagnetic Field. EN 61000-4-4 IEC 1000-4-4 (IEC 801-4) Electrical Fast Transient (Burst). Radiated Emissions and Conducted Emissions. EN 55022:1987 Class B. CISPR-22: 1985.

FCC Complies with requirements in FCC Part 15 rules for a Class B Computing Device.

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Design

The Excel 10 W7762 Hydronic Controller is available in two basic models. The W7762A has a built-in setpoint adjustment knob, available in relative or degrees C absolute scales. The W7762B has no built-in setpoint adjustment and as such requires either a setpoint input from a direct-connected wall module or from the E-Bus network. All of the controllers are powered by 24 Vac.

All wiring connections to the controllers are made at screw terminal blocks accessible beneath a plastic safety cover. Mounting dimensions are shown in Fig. 6.

CAUTION

Turn off power prior to connecting to or removing connections from any terminals to avoid electrical shock or equipment damage.

3-3/8

(86)

1-13/16 (46)

Fig. 6. W7762 construction in inches (mm).

4-9/16 (116)

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EXCEL 10 HYDRONIC CONTROLLER SYSTEM ENGINEERING

Controller Performance Specifications

Power Supply:

24 Vac ± 20%, 50/60 Hz.

Operating Temperature:

32° to 122°F (0° to 50°C).

Shipping/Storage Temperature:

-40° to 158°F (-40° to 70°C).

Relative Humidity:

5% to 95% non-condensing

Inputs:

Temperature Sensor:

20k ohm NTC

Setpoint Potentiometer:

10k ohm

Digital Input:

Closed ≤ 400 ohms (1.5 mA)

Open ≥ 10k ohms (4.8 V)

Outputs:

Triac voltage range:

24 Vac ± 20%. Triac maximum current ratings:

250 mA continuous

650 mA surge for 30 sec.

IMPORTANT:

When any device is energized by a Triac, the device must be able to sink a minimum of 15 mA. If nonHoneywell motors, actuators, or transducers are to be used with Excel 10 Hydronic Controllers, compatibility must be verified.

Interoperability

The W7762 Controllers use the Echelon Bus (E-Bus) LonTalk protocol. They support the L “Fan Coil Unit Controller”, version 2.0. Fig. 7 shows the implementation used.

ONMARK Functional Profile # 8020

nviSpaceTemp

nv1

SNVT_temp_p

nviSetPoint

nv2

SNVT_temp_p

nviFanSpeedCmd

nv6

SNVT_switch

nviOccCmd

nv7

SNVT_occupancy

nviApplicMode

nv8

SNVT_hvac_mode

nviSetPtOffset

nv9

SNVT_temp_p

nviWaterTemp

nv10

SNVT_temp_p

nviDischAirTemp

nv17

SNVT_temp_p

nviEnergyHoldOff

nv18

SNVT_switch

nviSensorOcc SNVT_Occupancy

nviEmerg SNVT_hvac_emerg

Hardware Output

Fan Coil Unit Controller Object #8020

nvoHeatOutput

nv3

SNVT_lev_percent

Mandatory Network Var ia ble s

Optional Network Var iable s

nvoCoolOutput

nv4

SNVT_lev_percent

nvoFanSpeed

nv5

SNVT_switch

nvoTerminalLoad

nv11

SNVT_lev_percent

nvoLoadAbs

nv12

SNVT_power

nvoDischAirTemp

nv13

SNVT_temp_p

nvoReheat

nv14

SNVT_switch

nvoSpaceTemp

nv15

SNVT_temp_p

nvoEffectSetPt

nv16

SNVT_temp_p

nvoEffectOcc

nv19

SNVT_occupancy

nvoEnergyHoldOff

nv20

SNVT_switch

nvoUnitStatus

nv21

SNVT_hvac_status

Configuration Properties

nc49 - nciSndHrtBt SNVT_time_sec mandatory nc52 - nciMinOutTm SNVT_time_sec optional nc48 - nciRcvHrtBt SNVT_time_sec optional nc17 - nciLocation SNVT_str_asc optional nc60 - nciSetPnts nc59 - nciNumValve

SNVT_temp_setpt SNVT_count

Manufacturer

Defined

mandatory optional

nvoSensorOcc SNVT_occupancy

Section

nvoDigitInState SNVT_switch

nviReheatRelay SNVT_switch

Hardware

Input

NOT SUPPORTED.

Fig. 7. LONMARK Fan Coil Unit object profile.

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Configurations

General

The following sections provide an overview of the Excel 10 Hydronic Controller options related to inputs and outputs. See Application Step 6. Configure Controllers for complete list of configuration options and defaults.

Table 6. Hardware options summary.

Option Possible Configurations

Fan interlock enabled

disabled

Hydronic system type two-pipe

four-pipe

Heating actuator type floating

floating-mid (one for heat/cool) one-stage two-stage three-stage PWM thermal

Cooling actuator type floating

floating-mid (one for heat/cool) one-stage two-stage three-stage PWM thermal

Digital input

Wall module option local

Temperature sensor type none

NOTE:

The floating-mid option is only for changeover applications

and uses only one of the two outputs.

not used window closed occupied sensor airflow detector cool changeover movement window open unoccupied sensor no airflow heat changeover input no movement

shared

NTC non-linearized

Fan Interlock (not available through E-Vision)

A fan interlock can be configured that prevents heating or cooling outputs from being turned on in the event of a fan failure (where an airflow detector is installed to detect fan failure). As the Hydronic Controller has no fan outputs, the interlock feature is applicable only to systems with manual fan switches.

Type of Heating and Cooling Equipment

W7762 controllers can operate with either two-pipe or fourpipe systems. A two-pipe system requires a changeover input to the controller (hardware or network input).

W7762 controllers can operate with a variety of actuators for heating and cooling equipment. Floating actuators requiring that the valve run time be specified during configuration of the controller can be used. Valve action can be configured as either direct or reverse. When in a two-pipe system with a changeover input, a floating actuator can be used that has the middle position (50%) as the zero energy position. The cool range is then 0 to 50% and the heat range 50 to 100%. The output must be configured as floating-mid.

Multi-stage systems can be controlled with up to three different stages of heating/cooling control. Switching levels are specified in % of control level (see Fig. 8) as is a hysteresis setting that applies to all switching levels. Heating and Cooling switching levels and hysteresis are specified separately. Minimum off times can be configured, and a minimum on time can also be configured.

PWM electronic valves and thermal actuators can also be connected and can be configured as either direct or reverse action. The cycle time must be specified during configuration. For PWM valves the zero and full positions must also be configured.

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EXCEL 10 HYDRONIC CONTROLLER SYSTEM ENGINEERING

Fig. 8. Three-stage heating/cooling switching (defaults for switching levels and hysteresis shown).

Digital Input

There is a single digital input to the W7762 Controller that may be configured to accommodate an occupancy sensor, a window open/closed contact, an airflow detector for fan failure detection (not available through E-Vision), or a changeover input. It is possible to configure the input for either normally open or normally closed contacts for any of the switches. Choose the option that corresponds to the condition of a closed contact (input high).

The control algorithm in the Hydronic Controller uses the Occupancy Sensor, if configured, to determine the Effective Occupancy mode of operation (see Table 3). If the Time Of Day (TOD) schedule indicates an Occupied state, and the Occupancy Sensor contact is closed, the Effective Occupancy mode will be Occupied. However, if the TOD schedule indicates an Occupied state and the Occupancy Sensor contact is open, then the Effective Occupancy mode will be Standby. The flow control algorithm will then control to the Standby Cooling and Heating Setpoints.

Configuring the digital input for movement or no movement (dependent upon normally-open or normally-closed contacts) adds a delay of 15 minutes to the occupancy sensor such that the space is considered occupied until 15 minutes has elapsed since the last movement is detected.

If the digital input is configured as a window open/closed contact, heating and cooling control will be disabled while the window is detected open. Frost protection will be in effect, however, and heating control will be enabled if the temperature drops below 46°F (8°C). A set of contacts may be wired in series for multiple windows.

If the digital input is configured for an airflow detector (fan status), heating and cooling control will be disabled for a fan failure (no airflow detected). This option is not available through E-Vision.

The input may also be configured for changeover for a twopipe system. The input can accommodate a switch that is closed for heating and open for cooling or open for heating and closed for cooling.

NOTE: The Excel 10 Hydronic Controller has limited power

available (only 1.5 mA/4.8 V) for checking the digital

input for contact closures. Ensure that contacts used remain within the specified resistance tolerance range (closed ≤ 400 ohms) even when aged.

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EXCEL10 HYDRONIC CONTROLLER SYSTEM ENGINEERING

Excel 10 Wall Module Options

A typical Hydronic installation will include an Excel 10 wall module containing a 20k ohm NTC room temperature sensor and additional features depending on the wall module type (see Excel 10 wall module literature for further information).

IMPORTANT

Wall modules with fan speed switches must not be used with W7762 Hydronic Controllers.

The Hydronic Controller can be configured to use a return air sensor rather than the sensor in the wall module. Setpoint adjustments can be configured as relative or absolute, and upper and lower limits can be set. The bypass button can be configured to override the control mode to occupied for a configurable bypass time and to override the control mode indefinitely to unoccupied or it may be configured to only override to occupied. The button may also be used to cancel the override.

Common Temperature Control (Master/Slave Controllers)

When one or more Hydronic Controllers serve a common area and a single temperature sensor is to be used, a master/slave arrangement can be configured. One Excel 10 Hydronic Controller is configured for the local wall module with the desired options. The other Excel 10 Hydronic Controller(s) will be configured without wall modules and with certain network variables bound with the master controller. Refer to Appendix B of this document for more details.

IMPORTANT

The slave units must have the same HVAC equipment connected to it as the master units.

The slave units will not use any internal temperature setpoints or control algorithms. The master controller determines heating/cooling output based upon setpoints and occupancy and command mode status and communicates this to the slave via the network. See Appendix B, Configuring for Master/Slave Operation, for more information,

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EXCEL 10 HYDRONIC CONTROLLER SYSTEM ENGINEERING

Abbreviations and Definitions

CARE - Computer Aided Regulation Engineering; the PC

based tool used to configure C-Bus-Bus devices.

C-Bus -Honeywell proprietary Control Bus for

communications between EXCEL 5000 controllers and components.

CPU - Central Processing Unit; an EXCEL 5000

controller module.

E-Bus - Echelon

LONWORKS® network for communication

among Excel 10 Controllers.

E-Bus Segment - An E-Bus section containing no more than

60 Excel 10s. Two segments can be joined together using a router.

Echelon

- The company that developed the LONWORKS®

network and the Neuron

chips used to

communicate on the E-Bus.

EMI - Electromagnetic Interference; electrical noise that

can cause problems with communications signals.

EMS - Energy Management System; refers to the

controllers and algorithms responsible for calculating optimum operational parameters for maximum energy savings in the building.

EEPROM - Electrically Erasable Programmable Read Only

Memory; the variable storage area for saving user Setpoint values and factory calibration information.

EPROM - Erasable Programmable Read Only Memory; the

firmware that contains the control algorithms for the Excel 10 Controller.

E-Vision - PC-based tool used for configuration and

commissioning of Excel 10 devices.

Excel 10 Zone Manager - A controller that is used to

interface between the C-Bus and the E-Bus. The Excel 10 Zone Manager also has the functionality of an Excel 100 Controller, but has no physical I/O points.

NOTE: The Q7750A Zone Manager may be

referred to as E-Link.

System

Firmware - Software stored in a nonvolatile memory medium

such as an EPROM.

I/O - Input/Output; the physical sensors and actuators

connected to a controller.

I x R - I times R or current times resistance; refers to Ohms

Law: V = I x R.

K - Kelvin.

LiveCARE - The PC based tool used to monitor and change

parameters in C-Bus devices.

NEC - National Electrical Code; the body of standards for

safe field-wiring practices.

NEMA - National Electrical Manufacturers Association; the

standards developed by an organization of companies for safe field wiring practices.

NV - Network Variable; an Excel 10 Controller parameter

that can be viewed or modified over the E-Bus network.

OEM - Original Equipment Manufacturer; the company that

builds the fan coil units.

PC - Personal Computer.

Pot - Potentiometer. A variable resistance electronic

component located on Excel 10 wall modules. Used to allow user-adjusted Setpoints to be input into the Excel 10 Controller.

Subnet - An E-Bus segment that is separated by a router

from its Q7750A Zone Manager.

TOD - Time-Of-Day; the scheduling of Occupied and

Unoccupied times of operation.

VA - Volt-Amperes; a measure of electrical power output

or consumption as applicable to an ac device.

Vac - Voltage alternating current; ac voltage as opposed to

dc voltage.

XBS - Excel Building Supervisor; a PC-based tool for

monitoring and changing parameters in C-Bus devices.

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EXCEL10 HYDRONIC CONTROLLER SYSTEM ENGINEERING

APPLICATION STEPS

Overview

Steps one through seven, see Table 7, address considerations for engineering an Excel 10 Hydronic System. These steps are guidelines intended to aid understanding of the product I/O options, bus arrangement choices, configuration options and the Excel 10 Hydronic Controllers’ role in the overall EXCEL 5000® System architecture.

Table 7. Application steps.

Step No. Description

1 Plan The System

2 Determine Other Bus Devices Required

3 Lay out Communication and Power Wiring

4 Prepare Wiring Diagrams

5 Order Equipment

6 Configure Controllers

7 Troubleshooting

Step 1. Plan The System

Plan the use of the W7762 Controllers according to the job requirements. Determine the location, functionality and sensor or actuator usage. Verify the sales estimate of the number of W7762 Controllers and wall modules required for each model type. Also check the number and type of output actuators and other accessories required.

When planning the system layout, consider potential expansion possibilities to allow for future growth. Planning is very important to be prepared for adding HVAC systems and controllers in future projects.

NOTEBOOK PC USING E-VISION

SHIELDED INTERFACE CABLE

RS-232 SERIAL PORT

SLTA

Fig. 9. Connecting the portable operator terminal to the

E-Bus.

HYDRONIC CONTROLLER

E-BUS PORT

The E-Bus communication loop between controllers must be laid out according to the guidelines applicable for that topology. Hydronic Controllers use FTT technology that allows daisy chain, star, loop or combinations of these bus configurations. See Application Step 3. Lay Out Communications and Power Wiring, for more information on bus wiring layout, and see Fig. 10, Fig. 11, and Fig. 12 in Application Step 4. Prepare Wiring Diagrams, for wiring details.

It is important to understand the interrelationships between controllers on the E-Bus early in the job engineering process to ensure their implementation when configuring the controllers. (See Application Step 6. Configure Controllers, for information on the various Excel 10 Hydronic Controller parameters and on Excel 10 Hydronic Controller point mapping).

The T7770 Wall Modules can be installed only as I/O devices, or additional wiring can be run to them for the E-Bus network to allow a CARE/E-Vision operator terminal to have access to the E-Bus. It must be determined and documented prior to installation that T7770 Wall Modules will have their E-Bus network jacks connected.

Step 2. Determine Other Bus Devices Required

A maximum of 62 nodes can communicate on a single E-Bus segment. If more nodes are required, a router is necessary. Using a router allows up to 125 nodes, divided between two E-Bus segments. The router accounts for two of these nodes (one node on each side of the router); a Q7750A Excel 10 Zone Manager can take one node and two slots are available for operator terminal nodes, leaving 120 nodes available for Excel 10 Hydronic Controllers. All 120 controllers are able to communicate through the router. A Q7750A Excel 10 Zone Manager is required to connect the E-Bus to the standard EXCEL 5000 System C-Bus. Each Excel 10 Zone Manager can support no more than 120 W7762s. This is a limit set in the Excel 10 Zone Manager database and is an absolute maximum.

Each E-Bus segment is set up with two unused nodes to allow for an E-Vision operator terminal to be connected to the EBus. Multiple E-Vision terminals can be connected to the bus at the same time. Table 8 summarizes the E-Bus segment configuration rules.

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EXCEL 10 HYDRONIC CONTROLLER SYSTEM ENGINEERING

)

Table 8. E-Bus configuration rules and device node numbers.

One E-Bus Segment Example Maximum Number of Nodes Equals 62

One Q7750A Excel 10 Zone Manager 1 node

Port for operator terminal access (E-Vision) 1 node

Maximum number of Excel 10 Controllers 60 nodes (wall modules are not E-Bus nodes)

Total 62 nodes

Two E-Bus Segments Example Maximum Number of Nodes Equals 125

One Q7750A Excel 10 Zone Manager 1 node

One Q7751A Router 2 nodes (1 in each Bus Segment)

Ports for operator terminal access (two E-Vision terminals) 2 nodes (1 in each Bus Segment)

Maximum number of Excel 10 Controllers in segment number one 60 nodes (wall modules are not E-Bus nodes)

Maximum number of Excel 10 Controllers in segment number two 60 nodes (wall modules are not E-Bus nodes)

Total 125 nodes

The maximum length of an FTT E-Bus segment is 4600 ft (1400 m) for a daisy chain configuration or 1650 ft (500 m) total wire length and (400 m) node-to-node for any other type of configuration.

NOTE: For FTT E-Bus segments the distance from each

transceiver to all other transceivers and to the termination must not exceed the maximum node-tonode distance. If multiple paths exist, the longest one should be used for the calculation.

If longer runs are required, add a Q7751A Router to partition the system into two segments. It is not legal to use more than one router per Excel 10 Zone Manager.

In addition, all E-Bus segments require the installation of a Bus Termination Module. For an FTT E-Bus segment, one or two Termination Modules may be required depending upon the bus configuration. See Application Step 3. Lay Out Communications and Power Wiring, and the E-Bus Termination Module subsection in Application Step 4. for more details.

Q7750A2xxx ZONE MANAGER

W7762 HYDRONIC CONTROLLER W7762 HYDRONIC CONTROLLER

Step 3. Lay Out Communications and Power Wiring

E-Bus Layout

The communications bus, E-Bus, is a 78-kilobit serial link that uses transformer isolation and differential Manchester encoding. Wire the E-Bus using level IV 22 AWG or plenum rated level IV 22 AWG non-shielded, twisted pair, solid conductor wire as the recommended wire size (see Table 10 for part numbers). An FTT E-Bus can be wired in daisy chain, star, loop or any combination thereof as long as the maximum wire length requirements given in Step 2 are met.

NOTE: Due to the transformer isolation, the bus wiring does

not have a polarity; that is, it is not important which of the two E-Bus terminals are connected to each wire of the twisted pair.

E-Bus networks can be configured in a variety of ways, but the rules listed in Table 8 always apply. Fig. 10 and Fig. 11 depict two typical daisy chain E-Bus network layouts; one as a single bus segment that has 60 nodes or less, and one showing two segments. Fig. 12 shows examples of free topology bus layouts using 2000-series devices. The bus configuration is set up using the Network Manager tool from within E-Vision (see the E-Vision User Guide).

3 4 5 6 7 8

NOTE: C7750A Zone Manager has internal termination module (with jumpers installed as shown).

19 20

ORANGE

19 20

BROWN

TERMINATION MODULE (209541B

Fig. 10. E-Bus wiring layout for one daisy-chain network segment.

17 74-2935-3r0909

EXCEL10 HYDRONIC CONTROLLER SYSTEM ENGINEERING

(

)

Q7750A2xxx ZONE MANAGE

3 4 5 6 7 8

UP TO 60 TOTAL NODES

W7762 HYDRONIC CONTROLLER

TERMINATION

209541B

MODULE

W7762 HYDRONIC CONTROLLER

19 20

UP TO 60 TOTAL NODES

W7762 HYDRONIC CONTROLLER

19 20

LW R

ON ORKS OUTER

19 20

TERMINATION MODULE (209541B)

Fig. 11. E-Bus wiring layout for two daisy-chain network segments.

Fig. 12. Free topology E-Bus layout examples.

NOTE: See the E-Bus Termination Module section for

additional details.

IMPORTANT

Notes on Communications Wiring:

• Do not use different wire types or gauges on the same E-Bus segment. The step change in line impedance characteristics would cause unpredictable reflections on the bus. When the use of different types is unavoidable, use a Q7751A Router at the junction.

• All field wiring must conform to local codes and ordinances.

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EXCEL 10 HYDRONIC CONTROLLER SYSTEM ENGINEERING

• Do not use shielded cable for E-Bus wiring runs. The higher capacitance of the shielded cable will cause degradation of communications throughput. In noisy (high EMI) environments, avoid wire runs parallel to noisy power cables, or lines containing lighting dimmer switches, and keep at least 3 in. (76 mm) of separation between noisy lines and the E-Bus cable.

• Make sure that neither of the E-Bus wires is grounded.

Power Wiring

A power budget must be calculated for each Excel 10 W7762 Controller to determine the required transformer size for proper operation. A power budget is simply the summing of the maximum power draw ratings (in VA) of all the devices to be controlled by an Excel 10 W7762 Controller. This includes the controller itself, the equipment and various contactors and transducers, as appropriate, for the Excel 10 configuration.

Power Budget Calculation Example

The following is an example power budget calculation for a typical W7762 Excel 10 Hydronic Controller.

Assume a W7762 unit with a thermal actuator for cooling control and an electric actuator for heating. The power requirements are:

Device VA Information obtained from Excel 10 W7762 0.5 W7762 Hydronic Controller Specification Data

Z100A 12.0 Product Data Thermal actuator

M7410A 0.7 Product Data Electric Actuator TOTAL: 13.2 VA

The Excel 10 System example requires 13.2 VA of peak power; therefore, a 48 VA CRT 2 (20 VA AT20A for US) Transformer is able to provide ample power for this controller and its accessories.

Table 9. VA Ratings For Transformer Sizing.

Device Description VA

W7762A,B Excel 10 Hydronic Controller 0.5

T7560A DWM 0.2

Z100A Thermal actuator 12.0

M7410A Electric actuator 0.7

For contactors and similar devices, the in-rush power ratings should be used as the worst-case values when performing power budget calculations. Also, the application engineer must consider the possible combinations of simultaneously energized outputs and calculate the VA ratings accordingly. The worst case, which uses the largest possible VA load, should be determined when sizing the transformer.

Line Loss

Excel 10 Controllers must receive a minimum supply voltage of 20 Vac. If long power or output wire runs are required, a voltage drop due to Ohms Law (I x R) line loss must be considered. This line loss can result in a significant increase in total power required and thereby affect transformer sizing. The following example is an I x R line-loss calculation for a 200 ft (61m) run from a transformer to a W7750 CVAHU Controller drawing 37 VA using two 18 AWG (1.0 mm

) wires.

The formula is:

Loss = [length of round-trip wire run (ft)] x [resistance in

wire (ohms per ft)] x [current in wire (amperes)]

From specification data:

18 AWG twisted pair wire has 6.38 ohms per 1000 feet. Loss = [(400 ft) x (6.38/1000 ohms per ft)] x

[(37 VA)/(24V)] = 4.0 volts

This means that four volts are going to be lost between the transformer and the controller; therefore, to ensure that the controller receives at least 20 volts, the transformer must output more than 24 volts. Because all transformer output voltage levels depend on the size of the connected load, a larger transformer outputs a higher voltage than a smaller one for a given load. Fig. 13 shows this voltage load dependence.

In the preceding I x R loss example, even though the controller load is only 37 VA, a standard 40 VA transformer is not sufficient due to the line loss. From Fig. 13, a 40 VA transformer is just under 100 percent loaded (for the 37 VA controller) and, therefore, has a secondary voltage of 22.9 volts. (Use the lower edge of the shaded zone in Fig. 13 that represents the worst-case conditions.) When the I x R loss of four volts is subtracted, only 18.9 volts reaches the controller, which is not enough voltage for proper operation.

In this situation, the engineer basically has three alternatives:

1. Use a larger transformer; for example, if an 80 VA

model is used, see Fig. 13, an output of 24.4 volts minus the four volt line loss supplies 20.4 volts to the controller. Although acceptable, the four-volt line-loss in this example is higher than recommended. See the following IMPORTANT.

2. Use heavier gauge wire for the power run. 14 AWG (2.0

) wire has a resistance of 2.57 ohms per 1000 ft that, using the preceding formula, gives a line-loss of only 1.58 volts (compared with 4.02 volts). This would allow a 40 VA transformer to be used. 14 AWG (2.0

) wire is the recommended wire size for 24 Vac wiring.

3. Locate the transformer closer to the controller, thereby

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

The issue of line-loss is also important in the case of the output wiring connected to the Triac digital outputs. The same formula and method are used. The rule to remember is to keep all power and output wire runs as short as practical. When necessary, use heavier gauge wire, a bigger transformer, or install the transformer closer to the controller.

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EXCEL10 HYDRONIC CONTROLLER SYSTEM ENGINEERING

IMPORTANT

No installation should be designed where the line loss is greater than two volts to allow for nominal operation if the primary voltage drops to 102 Vac (120 Vac minus 15%) or 193 Vac (230 minus 15%).

To meet the National Electrical Manufacturers Association (NEMA) standards, a transformer must stay within the NEMA limits. The chart in Fig. 13 shows the required limits at various loads.

With 100 percent load, the transformer secondary must supply between 23 and 25 volts to meet the NEMA standard. When a purchased transformer meets the NEMA standard DC20-1986, the transformer voltage-regulating ability can be considered reliable. Compliance with the NEMA standard is voluntary.

The following Honeywell transformers meet this NEMA standard: Transformer Type VA Rating AT20A 20 AT40A 40 AT72D 40 AT87A 50 AK3310 Assembly 100

IMPORTANT (US ONLY)

If the W7762 Controller is used on Heating and Cooling Equipment (UL 1995) devices and the

transformer primary power is more than 150 volts, connect the transformer secondary to earth ground, see Fig. 14.

27 26 25 24 23 22 21 20 19 18

SECONDARY VOLTAGE

17 16 15 14

0 50 100 150

% OF LOAD

M993

200

Fig. 13 NEMA class 2 transformer voltage output limits.

IMPORTANT

Step 4. Prepare Wiring Diagrams

General Considerations

The purpose of this step is to assist the application engineer in developing job drawings to meet job specifications. Wiring details for the W7762 Hydronic Controller are shown in Fig.

16. Table 11 gives additional details for output connections.

NOTE: For field wiring, when two or more wires are to be

Table 10 lists wiring types, sizes, and length restrictions for Excel 10 Hydronic Controller products.

If the W7762 Controller is used in UL 1995 equipment and the primary power is more than 150 Vac, ground one side of the transformer.

Fig. 14 Power wiring details for one Excel 10 per

transformer.

Notes on power wiring:

• All field wiring must conform to local codes and

ordinances or as specified on installation wiring diagrams.

• To maintain NEC Class 2 and UL ratings, the

installation must use transformers of 100 VA or less capacity.

• For multiple controllers operating from a single

transformer, the same side of the transformer secondary must be connected to the same input terminal in each controller.

• For the W7762 Controller (which has Triac outputs), all output devices must be powered from the same transformer as the one powering the W7762 Controller.

• Use the heaviest gauge wire available, up to

14 AWG (2.0 mm (1.0 mm

) for all power and earth ground connec-

) with a minimum of 18 AWG

tions.

• To minimize EMI noise, do not run Triac and/or relay

output wires in the same conduit as the input wires or the E-Bus communications wiring.

• Unswitched 24 Vac power wiring can be run in the

same conduit as the E-Bus cable.

attached to the same connector block terminal, be sure to twist them together. Deviation from this rule can result in improper electrical contact. See Fig. 15.

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EXCEL 10 HYDRONIC CONTROLLER SYSTEM ENGINEERING

Table 10. Field wiring reference table (US part numbers shown).

Wire

Function E-Bus (Plenum)

E-Bus (Non-

Recommended

Minimum Wire

Size AWG (mm

)

22 AWG Twisted pair solid conductor,

Construction

non-shielded.

plenum)*

Input Wiring Sensors Contacts

14 to 20 AWG

(2.0 to 0.5 mm

Multiconductor (usually five-

)

wire cable bundle). For runs

>100 ft (30 m) twisted pair or

shielded cable is

recommended.

Output Wiring Actuators Relays

14 AWG (2.5

)

(18 AWG (1.0

) acceptable

Any pair non-shielded (use

heavier wire for longer runs).

for short runs)

Power Wiring

14 AWG

(2.5 mm

Any pair non-shielded (use

)

heavier wire for longer runs).

NOTE: PVC wire must not be used where prohibited by local fire regulations.

W7762 Controller

Fig. 16 illustrates W7762 Controller terminal block assignments and wiring for a sample Hydronic installation. All connections are made at terminal blocks.

Specification

Requirement

Level IV 140°F

(60°C) rating

Level IV 140°F

(60°C) rating

140°F (60°C)

rating

NEC Class 2 140°F (60°C)

rating

NEC Class 2 140°F (60°C)

rating

Table 11 lists wiring information for wiring all of the possible actuator types.

Vendor Wire Type

Honeywell (US)

Maximum Length

ft (m)

See Step 2

AK3791 (one twisted pair)

AK3792 (two twisted pairs)

(Europe: Belden

9H2201504)

Honeywell (US)

See Step 2

AK3781 (one twisted pair)

AK3782 (two twisted pairs)

(Europe: Belden

9D220150)

Standard thermostat wire 82.5 ft (25m)

Honeywell (US)

200 ft (60m) AK3702 (18 AWG) AK3712 (16 AWG) AK3754 (14 AWG)

or equivalent

Honeywell (US)

AK3754 (14 AWG)

(twisted pair)

AK3909 (14 AWG) single

conductor or equivalent

Limited by line loss

effects on power

consumption.

(See Line Loss

subsection.)

1. STRIP 1/2 IN. (13 MM) FROM W IRES TO BE ATTACHED AT ONE TERMAINAL

2. TWIST WIRES TOGETHER WITH PLIERS (A MINIMUM OF THREE TURNS).

3. CUT TW ISTED END OF WIRES TO 3/16 IN. (5 MM) BEFORE INSERTING INTO TERMINAL AND TIGHTENING SCREW . THEN PULL ON EACH WIRE IN ALL TERMINALS TO CHECK FOR GOOD MECHANICAL CONNECTION.

Fig. 15. Attaching two or more wires at terminal blocks.

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EXCEL10 HYDRONIC CONTROLLER SYSTEM ENGINEERING

W7762 HYDRONIC CONTROLLER

OCCUPANCY SENSOR

CHANGEOVER CONTACT

AIRFLOW CONTACT WINDOW CONTACT

MOTION SENSOR

WALL MODULE CONNECTIONS

1 2

4 5

N N

LED BYPASS

SETPT SENSOR GND

Wall module setpoint connection for W7762B only.

24 VAC COM

OUT 1 OPEN

OUT 1 CLOSE

OUT 2 OPEN

OUT 2 CLOSE

E-BUS (LON) E-BUS (LON)

Fig. 16. W7762 Hydronic Controller wiring example.

Table 11. Output assignments for various actuator types.

Output type Out 1 Terminal Out 2 Terminal

13 14 15 16 17 18

Floating 24 Vac open close 24 Vac open close

1-stage 24 Vac on/off — 24 Vac on/off —

2-stage 24 Vac stage 1 stage 2 24 Vac stage 1 stage 2

3-stage 24 Vac stage 1 stage 2 24 Vac stage 1 stage 2

stage 3 stage 3

PWM 24 Vac PWM — 24 Vac PWM —

Thermal 24 Vac on/off — 24 Vac on/off —

E-Bus Termination Module

One or two E-Bus Termination Modules, part no. 209541B, are required for an E-Bus with FTT devices on it, depending upon the configuration. Double termination is only required when the network is a daisy-chain configuration and the total wire length is greater than 1640 ft (500 m). The maximum lengths described in Step 2 must be adhered to for either a daisy chain or free topology E-Bus layout. See Fig. 17 for connection details for a doubly terminated bus. See Fig. 18 for connection details for a singly terminated bus.

NOTE: The Q7750A Zone Manager has an internal ter-

mination circuit, although jumpers are required at the terminal block to connect it. See form number 957509-2 for details.

Fig. 17. Termination Module connections for a doubly-

Fig. 18. Termination Module connections for a singly-

24 VAC

OUT 1 COM

OUT 2 COM

24 VAC

15 16

17 18 19

24 VAC COM

COM

OPEN

LONW

ONWORKS

HEAT

ORKS

NETWORK IN

NETWORK OUT

terminated FTT network.

COM

OPEN

120/240 VAC

COOL

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EXCEL 10 HYDRONIC CONTROLLER SYSTEM ENGINEERING

Step 5. Order Equipment

After compiling a bill of materials through completion of the previous application steps, refer to Table 12 for ordering information. Contact Honeywell for information about Controllers and Wall Modules with no logo.

Table 12. Excel 10 Hydronic Controller ordering information.

Part Number Product Description Comments

Excel 10 Hydronic Controllers

W7762A1045 with setpoint knob °C absolute W7762A1052 with setpoint knob +/- relative W7762B1019 no setpoint knob

Excel 10 Wall Modules

T7460 T7560 T7770

Excel 10 Sensors

C7068A1007 (Europe) Air Temperature Sensor Return air

Echelon-Based Components and Parts

Q7751A2002 (US)

(UK)

(Europe)

Q7752A2001 (US)

(UK) (Europe) 209541B FTT Termination Module Two required per E-Bus segment.

205979A (US only) SLTA Connector Cable for E-Bus Serial interface to wall module or controller.

Excel 10 Zone Manager

Q7750A2003 FTT E-Bus Zone Manager C-Bus to E-Bus interface

XD 505A 9600 Baud C-Bus Communications

XD 508 (1 Megabit Baud Rate) C-Bus

Cabling

— Serial Interface Cable, male DB-9 to female

Honeywell (US)

AK3791 (one twisted pair)

AK3792 (two twisted pairs)

Belden 9H2201504 (Europe)

Honeywell (US)

AK3781 (one twisted pair)

AK3782 (two twisted pairs)

Belden 9D220150 (Europe)

Honeywell (US) AK3725 Inputs: 18 AWG (1.0 mm2) five wire cable

Honeywell (US) AK3752

(typical or equivalent)

Honeywell (US) AK3702

(typical or equivalent)

Honeywell (US) AK3712

(typical or equivalent)

Honeywell (US) AK3754

(typical or equivalent)

FTT E-Bus Router

FTT E-Bus Serial Interface (SLTA)

Submodule

Communications Submodule

DB-9 or female DB-25. E-Bus (plenum): 22 AWG twisted pair solid conductor, non-shielded.

E-Bus (non-plenum): 22 AWG twisted pair solid conductor, non-shielded.

bundle. Outputs/Power: 14 to 18 AWG (2.5 to

1.0 mm 18 AWG (1.0 mm2) twisted pair. Non-plenum

16 AWG (1.5 mm2) twisted pair. Non-plenum

14 AWG (2.5 mm2) two conductor. Non-plenum

See Excel 10 wall module literature for details.

Order from local Echelon supplier (Europe)

—

Obtain locally from any computer hardware vendor. Level IV 140°F (60°C) rating

Level IV 140°F (60°C) rating

Standard thermostat wire

NEC Class 2 140°F (60°C) rating

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EXCEL 10 HYDRONIC CONTROLLER SYSTEM ENGINEERING

Step 6. Configure Controllers

General

The process of configuring Excel 10 Hydronic Controllers is the same for all models. In all cases, the process involves giving the Excel 10 Hydronic Controller information using the E-Vision PC tool. Details on the use of E-Vision are found in the E-Vision User Guide. The E-Vision User Guide provides detailed steps for defining the Excel 10 Zone Manager (if required); creating or starting an existing E-Vision project; creating or selecting an existing network; building or modifying the network; defining and copying controllers; mapping points between controllers, the Zone Manager, and third-party devices; connecting to controllers for commissioning, monitoring and uploading; and various other functions. This section will provide details on the configuration options found in E-Vision for W7762 Controllers. If another E-Bus communication tool is used for set-up, see Appendix C for reference information.

Using E-Vision

The configuration process is primarily performed in a series of screens seen as file tabs under the menu option Application Selection and is easily followed using the tables included in this section. There are 8 file tabs:

• Output

• Input

• Equipment Control

• Switching Levels

• Zone Options

• Miscellaneous

• PID

• Wiring (information only, no configuring).

The specific parameters to be configured in each of these four categories are tabulated in the following subsections. For a complete list of all Excel 10 Hydronic Controller User Addresses, see Appendix C.

The configuration of the setpoints as either absolute or relative is performed in E-Vision in the Project Defaults screen.

NOTE: To set the following configuration parameters, use

the E-Vision PC tool. These sections describe the various parameters and the allowable settings. For details on using E-Vision, refer to the E-Vision User Guide.

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