Honeywell W7763C, W7763E, W7763D USER GUIDE
Excel 10
W7763C,D,E CHILLED CEILING CONTROLLERS
LNS PLUG-INS
HONEYWELL EXCEL 5000 OPEN SYSTEM
USER GUIDE
CONTENTS
Introduction .................................................................................................................................................................................. 1
Description of Devices ................................................................................................ 1
Products Covered ....................................................................................................... 2
Organization of Manual ............................................................................................... 2
Applicable Literature ................................................................................................... 2
Product Names ........................................................................................................... 2
Control Application...................................................................................................... 3
Control Provided ......................................................................................................... 3
Setpoints.......................................................................................................... 4
Bypass............................................................................................................. 5
LED/LCD ......................................................................................................... 5
Energy-Saving Features .................................................................................. 5
Occupancy Status............................................................................................ 6
Condensation Protection ................................................................................. 6
Operating Modes ............................................................................................. 7
Agency Listings........................................................................................................... 8
Construction................................................................................................................ 8
Controllers ....................................................................................................... 8
Controller Performance Specifications............................................................. 9
Configurations........................................................................................................... 10
General.......................................................................................................... 10
Type of Heating and Cooling Equipment ....................................................... 10
Digital Input.................................................................................................... 11
Excel 10 Wall Module Options ....................................................................... 11
Abbreviations and Definitions.................................................................................... 13
Application Steps ....................................................................................................................................................................... 14
Overview................................................................................................................... 14
Step 1. Plan The System .......................................................................................... 14
Step 2. Determine Other Bus Devices Required....................................................... 14
Step 3. Lay Out Communications and Power Wiring ................................................ 15
LonWorks Layout........................................................................................... 15
Power Wiring ................................................................................................. 17
Step 4. Prepare Wiring Diagrams ............................................................................. 18
General Considerations ................................................................................. 18
W7763 Controller........................................................................................... 19
LonWorks Termination Module ...................................................................... 20
Step 5. Order Equipment .......................................................................................... 21
Step 6. Plug-Ins Configuration Screens .................................................................... 22
General.......................................................................................................... 22
Output............................................................................................................ 23
Input............................................................................................................... 24
Equipment Control ......................................................................................... 25
Switching Levels ............................................................................................ 25
Zone Options ................................................................................................. 26
Miscellaneous ................................................................................................ 26
PID................................................................................................................. 27
Commissioning .............................................................................................. 27
ID Number ..................................................................................................... 27
Step 7. Troubleshooting............................................................................................ 28
Troubleshooting Excel 10 Chilled Ceiling Controllers and Wall Modules ....... 28
® U.S. Registered Trademark 74-3332-2r0909
Copyright © 2009 Honeywell Inc.
All Rights Reserved
EXCEL10 CHILLED CEILING CONTROLLER LNS-PLUG-INS USER GUIDE
Alarms ............................................................................................................28
Broadcasting the Service Message ................................................................30
W7763 Controller Status LED ........................................................................30
Manual Mode..................................................................................................30
Appendix A: Using A LNS tool to commission a Chilled Ceiling Controller..........................................................................31
Temperature Sensor Calibration................................................................................31
Appendix B: Configuring for Master/Slave Operation .............................................................................................................32
Output Configuration Options ....................................................................................32
Input Configuration Options .......................................................................................32
Equipment Control Options........................................................................................32
Zone Control Options.................................................................................................32
Network Variable Binding...........................................................................................32
Appendix C: LON Interface.........................................................................................................................................................33
74-3332-2
EXCEL 10 CHILLED CEILING CONTROLLER LNS-PLUGINS USER GUIDE
INTRODUCTION
Description of Devices
The W7763C, D and E Controllers are three Chilled Ceiling
Controllers in the Excel 10 family product line. They cover a
wide range of control applications including radiators,
induction units, chilled ceiling, and chilled beam 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
features make the W7763 especially suitable for systems
using electric heat and compressors. The W7763 Controllers
are capable of stand-alone operation; however, optimum
functional benefits are achieved when the network
communication capabilities are used.
The zone controlled by the W7763 Controller will typically use
an Excel 10 wall module with a temperature sensor for space
temperature measurement, setpoint adjustment, bypass
push-button, status LED, and LCD display. See page 2 for
form numbers of Excel 10 wall module literature for further
information.
Fig. 1 shows an overview of a typical system layout.
EXCEL 10 CHILLED
CEILING CONTROLLER
Fig. 1. Typical system overview
74-3332-2
1
EXCEL10 CHILLED CEILING CONTROLLER LNS-PLUG-INS USER GUIDE
Products Covered
This System Engineering Guide describes how to apply the
Excel 10 Chilled Ceiling Controller and the accessories to
typical Chilled Ceiling applications. The specific devices
covered include:
• W7763C, D and E Chilled Ceiling Controllers.
• T7460 Wall Modules.
• T7560 Wall Modules.
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 a LNS tool after the
devices and accessories are ordered. Application Step 7 is
troubleshooting. Information provided in support of the use of
third-party LonWorks communication packages to configure
Chilled Ceiling 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 Chilled Ceiling Controller and the
EXCEL 5000 System in general.
prod. lit.
no.
74-2989
95-7485
74-3083 Excel 10 T7460 Wall Modules - Specification Data
95-7610
74-3097 Excel 10 T7560 Wall Modules - Specification Data
95-7620
74-2697 Excel 10 T7770 Wall Modules - Specification Data
95-7538
74-2950
74-2951
95-7509
95-7554
95-7510 Excel 10 Q7751A Router - Installation Instructions
95-7511
74-2039 XBS User’s Manual
74-5018 XBS Application Guide
Excel 10 W7763C,D,E Chilled Ceiling Controller Specification Data
Excel 10 W7763C,D,E Chilled Ceiling Controller Installation Instructions
Excel 10 T7460 Wall Modules - Installation
Instructions
Excel 10 T7560 Wall Modules - Installation
Instructions
Excel 10 T7770 Wall Modules - Installation
Instructions
Excel 10 Q7750A, Excel 10 Zone Manager Specification Data
Excel 10 Q7750A Excel 10 Zone Manager Checkout and Test Manual
Excel 10 Q7750A Zone Manager - Installation
Instructions
Excel 10 FTT/LPT 209541B Termination Module Installation Instructions
Excel 10 Q7752A Serial Interface - Installation
Instructions
title
Product Names
The W7763 Controller is available in three models:
• W7763C Chilled Ceiling Controller with integral setpoint
adjustment, temperature sensor, and bypass push-button.
• W7763D Chilled Ceiling Controller with integral setpoint
adjustment only.
• W7763E Chilled Ceiling Controller with no integral setpoint
adjustment, sensor, or bypass push-button.
The W7763 Chilled Ceiling Controllers can use any of the
following Wall Modules:
• T7460A with temperature sensor.
• T7460B with temperature sensor and setpoint adjustment.
• T7460C with temperature sensor, setpoint adjustment, and
bypass button and LED.
• 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).
• VF20A Strap-on Temperature Sensor (Europe only).
2
)
2
)
2
) twisted
2
) twisted
74-3332-2 2
EXCEL 10 CHILLED CEILING CONTROLLER LNS-PLUGINS USER GUIDE
Control Application
Chilled Ceiling systems in commercial buildings control room
temperature through the control of heat and/or cold water
valves. W7763 Chilled Ceiling Controllers cover a wide range
of applications including radiators, induction units, chilled
ceiling and chilled beam, and fan coil units. The Chilled
Ceiling controller is typically connected to an Excel 10 wall
W7763E CHILLED
CEILING CONTROLLER
CHILLED WATER
TEMP SENSOR
module which incorporates a temperature sensor, setpoint
and a bypass or override button. Connection of a humidity
sensor and chilled water temperature sensor allow calculation
of the dewpoint for condensation prevention. Fig. 2 shows a
typical Chilled Ceiling control application.
WALL MODULE
SENSOR
WITH TEMP
SENSOR
WINDOW
CONTACT
HUMIDITY
1
Digital wall module T7560B has internal humidity sensor.
Fig. 2. Typical W7763 Chilled Ceiling control application.
Control Provided
The basic control sequence for a W7763 Chilled Ceiling
Controller 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.
LonWorksLonWorks
W7763 Chilled Ceiling Controllers use a PID control algorithm
where each of the three parameters can be configured. There
are additional configurable boost parameters (HeatBoost and
CoolBoost) which 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.
74-3332-2
3
EXCEL10 CHILLED CEILING CONTROLLER LNS-PLUG-INS USER GUIDE
Setpoints
Setpoint Knob
W7763C and D Chilled Ceiling Controllers have a built-in
setpoint potentiometer. W7763E controllers may have an
Excel 10 wall module with setpoint potentiometer connected
to them. When configured setpoint knob, the value from the
setpoint knob is used to calculate the Cooling or Heating
Occupied Setpoint. There are two options 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) which is added to the software
occupied setpoints for the heat and the cool modes (Cooling
Occupied Setpoint and Heating Occupied Setpoint). 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:
nvoActiveSetPt (in cooling mode) =
nvoSensor.remote_set_point+ (Cooling Occupied
Setpoint - Heating Occupied Setpoint) / 2
nvoActiveSetPt (in heating mode) = SrcRmTempSptHw -
(Cooling Occupied Setpoint - Heating Occupied
Setpoint) / 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 Minimum Limit Setpoint
Pot and Maximum Limit Setpoint Pot. 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
Minimum Limit Setpoint Pot, and the highest actual setpoint
allowed is equal to Maximum Limit Setpoint Pot. When the
setpoint knob is configured to be Relative, the lowest actual
setpoint allowed is equal to Heating Occupied Setpoint Minimum Limit Setpoint Pot, and the highest allowed is equal
to Cooling Occupied Setpoint + Maximum Limit Setpoint Pot.
Setpoint from Network
When not configured to use the wall module, nviSetPt must
be bound to another node that provides a setpoint. When
bound and a valid update is received, nviSetPtis used with the
appropriate ZEB:
ZEBoccupied = Cooling Occupied Setpoint - Heating
Occupied Setpoint
ZEBstandby = Cooling Standby Setpoint- Heating Standby
Setpoint
The Unoccupied setpoint does not depend on nviSetPt at all.
Setpoint Offset
Third party nodes may be bound to nviSetPtOffset 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
1
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
1
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
74-3332-2 4
EXCEL 10 CHILLED CEILING CONTROLLER LNS PLUG-INS USER GUIDE
Bypass
Bypass Mode
During Unoccupied periods, the bypass push-button (either on
the controller itself or 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
nviManOccCmd 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 (nviTodEvent network input)
switches the mode to Occupied.
4. The network input nviManOccCmd is set to to OC_NUL.
The LED on the Wall Module indicates the current bypass
mode status (see Wall Module Status LED section).
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 also
Wall Module Bypass push-button section.
Continuous Unoccupied Mode
This mode is entered when a wall module is configured to
allow it and the bypass button is pressed for four to seven
seconds. This mode can also be entered via a network
command (nviManOccCmd 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
W7763C Chilled Ceiling Controllers have a built-in bypass
push-button. W7763D and E controllers may have an
Excel 10 wall module with bypass push-button connected to
them. There are three ways to configure the bypass pushbutton (see Table 14 for further information):
NONE
BYPASS_UNOCCUPIED
BYPASS_ONLY
Override Priority
The Chilled Ceiling controller can be configured to arbitrate
overrides coming from the bypass push-button and the
network. There are two possible states which have the
following meanings:
LAST_WINS-Specifies that the last command received
from either the wall module or nviManOccCmd
determines the effective override state.
NETWORK_WINS-Specifies that when nviManOccCmd is
not OC_NUL, then the effective occupancy is
nviManOccCmd 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 setting nviManOccCmd to OC_STANDBY via the
network. When in Standby mode, the W7763 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 nviWindow. Frost
protection remains active (controller enables heating circuit
with room temperatures below 46°F (8°C)). Normal
temperature control resumes when the window closes.
74-3332-2
5
EXCEL10 CHILLED CEILING CONTROLLER LNS PLUG-INS USER GUIDE
Demand Limit Control
When a high-electrical-demand signal is received from an
energy management system via the LonWorks network
(nviDlcShed), the controller uses Demand Limit Control Bump
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, Cool Rec Ramp and Heat Rec
Ramp, 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 Chilled Ceiling 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
nviManOccCmd 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
Condensation Protection
W7763 Chilled Ceiling Controllers have several possibilities
for protection from condensation, using a calculated or
configured dewpoint and/or condensation switch.
Dewpoint Calculation
If the controller has humidity and chilled water inputs, either
directly connected or from the network, it will actively calculate
the dewpoint based upon room temperature and humidity. If
configured to do so, the controller will close the cooling valve
and issue an alarm if the chilled water temperature drops
below the dewpoint plus a configurable safety band. If no
humidity input is available, the controller will use a fixed
configured dewpoint.
Condensation Switch
The digital input can be configured for a condensation switch
which will close the cooling valve when condensation is
detected. This feature is independent of the comparison of the
chilled water temperature to the dewpoint and remains active
even if the dewpoint protection is disabled.
74-3332-2 6
EXCEL 10 CHILLED CEILING CONTROLLER SYSTEM ENGINEERING
Operating Modes
The possible modes of operation are listed in Table 4.
Table 4. Modes of Operation for Excel 10 Chilled Ceiling Controller.
Mode Description Events Causing a Controller to Switch to This Mode
Operational Modes (NV Reference)
START-UP AND
WAIT
FLOATING
OUTPUTS SYNCH
COOLING The Excel 10 Chilled Ceiling
HEATING The Excel 10 Chilled Ceiling
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 Chilled Ceiling Controller drives
the floating control valves to their
initial positions and then transitions to
one of the control modes.
Controller is controlling in the Cooling
mode.
Controller is 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
nviTest.
factory test program runs.
outputs are turned off (turn-off
sequences are active). Frost
protection is disabled.
settings in network input
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 Chilled Ceiling Controller transitions to this mode..
Network input (nviApplicMode) has a value of HVAC_COOL or
HVAC_AUTO and the space temperature is above the cooling
setpoint.
Network input (nviApplicMode) has the value of HVAC_HEAT or
HVAC_AUTO and the space temperature is below the heating
setpoint..
Network input (nviManualMode) has value of MODE_MANUAL.
This mode is for factory testing only.
Network input (nviManualMode) has a value of
MODE_DISABLED.
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EXCEL10 CHILLED CEILING CONTROLLER LNS PLUG-INS USER GUIDE
Agency Listings
Table 5 provides information on agency listings for Excel 10 Chilled Ceiling Controller products.
Table 5. Agency listings.
Device Agency Comments
W7763 Chilled Ceiling
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.
Construction
Controllers
The Excel 10 W7763 Chilled Ceiling Controller is available in
three basic models. The W7763C and D have a built-in
setpoint adjustment knob, available in relative or absolute
(degrees C or degrees F) scales. The W7763C also has a
temperature sensor and bypass push-button and LED. The
W7763E has no built-in setpoint adjustment, temperature
sensor or bypass push-button, and as such requires setpoint
and temperature inputs either from a direct-connected wall
module or from the LonWorks 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.
Fig. 6. W7763 construction in inches (mm).
74-3332-2 8
EXCEL10 CHILLED CEILING CONTROLLER LNS PLUG-INS USER GUIDE
Controller Performance Specifications
Power Supply:
24 Vac ± 20%, -15%, 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% noncondensing
Inputs:
Temperature Sensors:
20k ohm NTC
Setpoint Potentiometer:
10k ohm
Digital Input:
Closed ≤ 400 ohms (1.5 mA)
Open ≥ 10k ohms (4.8 V)
Humidity Sensor:
0 to 10 Vdc
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 Chilled Ceiling Controllers,
compatibility must be verified.
Interoperability
The W7763 Controllers use the Echelon 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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EXCEL10 CHILLED CEILING CONTROLLER LNS PLUG-INS USER GUIDE
Configurations
General
The following sections provide an overview of the Excel 10
Chilled Ceiling Controller options related to inputs and
outputs. See Application Step 6. Plug-Ins Configuration
Screens for a complete list of configuration options and
defaults.
Table 6. Hardware options summary.
Option Possible configurations
Chilled Ceiling 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 1 not used
window closed
occupied sensor
movement
window open
unoccupied sensor
heat changeover input
no movement
Analog input 2 not used
chilled water temperature
Analog input 3 not used
humidity
Wall module option local
shared
Space temperature sensor
type
NOTE: 1 The floating-mid option is only for changeover
applications and uses only one of the two outputs.
none
NTC non-linearized
1
1
cool changeover
Type of Heating and Cooling Equipment
W7763 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).
W7763 controllers can operate with a variety of actuators for
heating and cooling equipment. Floating actuators can be
used which will require specifying the valve run time during
configuration of the controller. 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 which 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 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 which 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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EXCEL10 CHILLED CEILING CONTROLLER LNS PLUG-INS USER GUIDE
Fig. 8. Three-stage heating/cooling switching (defaults for switching levels and hysteresis shown).
Digital Input
There is a single digital input to the W7763 Controller which
may be configured to accommodate an occupancy sensor, a
window open/closed contact, a condensation detector, 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 which corresponds to the
condition of a closed contact (input high).
The control algorithm in the Chilled Ceiling 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.
When configured for a condensation switch, the controller will
close the cooling valve when condensation is detected.
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 Chilled Ceiling 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) even when aged.
Excel 10 Wall Module Options
A typical Chilled Ceiling installation requires 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).
The W7763C Chilled Ceiling Controller has the following
features built-in and requires no external wall module:
— setpoint adjustment
— bypass button
— status LED
— a LonWorks network access jack
The W7763D has a setpoint knob and LonWorks jack but may
require a wall module for temperature sensing and bypass
button/LED functions. The W7763E Controller has only the
LonWorks jack and would normally require a wall module.
IMPORTANT
Wall modules with fan speed switches must not be
used with W7763 Chilled Ceiling Controllers.
The Chilled Ceiling Controller can be configured to use a
return air sensor rather than the sensor in the controller or
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.
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EXCEL10 CHILLED CEILING CONTROLLER LNS PLUG-INS USER GUIDE
Common Temperature Control (Master/Slave Controllers)
When one or more Chilled Ceiling Controllers serve a
common area and a single temperature sensor is to be used,
a master/slave arrangement can be configured. One Excel 10
Chilled Ceiling Controller is configured for the local wall
module with the desired options. The other Excel 10 Chilled
Ceiling 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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EXCEL10 CHILLED CEILING CONTROLLER LNS PLUG-INS USER GUIDE
Abbreviations and Definitions
Echelon
EMI - Electromagnetic Interference; electrical noise that
EMS - Energy Management System; refers to the
EEPROM - Electrically Erasable Programmable Read Only
EPROM - Erasable Programmable Read Only Memory; the
Firmware - Software stored in a nonvolatile memory medium
I/O - Input/Output; the physical sensors and actuators
I x R - I times R or current times resistance; refers to Ohms
K - Degrees Kelvin.
LNS LON Network Service
®
- The company that developed the LONWORKS®
network and the Neuron
®
chips used to
communicate on the LonWorks network .
can cause problems with communications signals.
controllers and algorithms responsible for calculating
optimum operational parameters for maximum
energy savings in the building.
Memory; the variable storage area for saving user
Setpoint values and factory calibration information.
firmware that contains the control algorithms for the
Excel 10 Chilled Ceiling Controller.
such as an EPROM.
connected to a controller.
Law: V = I x R.
LonWorks Segment - A LonWorks section containing no
more than 60 nodes. Two segments can be joined
together using a router.
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 LonWorks
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 Chilled Ceiling Controller.
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.
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EXCEL10 CHILLED CEILING CONTROLLER LNS PLUG-INS USER GUIDE
C
APPLICATION STEPS
NOTEBOOK P
Overview
Steps one through seven, see Table 7, address
considerations for engineering an Excel 10 Chilled Ceiling
System. These steps are guidelines intended to aid
understanding of the product I/O options, bus arrangement
choices, configuration options and the Excel 10 Chilled
Ceiling Controllers´ role.
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 Plug-Ins Configuration Screens
7 Troubleshooting
Step 1. Plan The System
Plan the use of the W7763 Controllers according to the job
requirements. Determine the location, functionality and sensor
or actuator usage. Verify the sales estimate of the number of
W7763 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.
USING LNS TOOL
Fig. 9. Connecting the portable operator terminal to the
The LonWorks communication loop between controllers must
be laid out according to the guidelines applicable for that
topology. Chilled Ceiling 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 LonWorks network early in the job
engineering process to ensure their implementation when
configuring the controllers. (See Application Step 6. Plug-Ins
Configuration Screens, for information on the various Excel
10 Chilled Ceiling Controller parameters and on Excel 10
Chilled Ceiling 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 LonWorks
network. It must be determined and documented prior to
installation which T7770 Wall Modules will have their
LonWorks network jacks connected.
Step 2. Determine Other Bus Devices
Required
A maximum of 62 nodes can communicate on a single
LonWorks segment. If more nodes are required, a router is
necessary. Using a router allows up to 125 nodes, divided
between two LonWorks segments. The router accounts for
two of these nodes (one node on each side of the router).
SHIELDED
INTERFACE
CABLE
RS-232
SERIAL
PORT
SLTA
LONWORKS PORT
LonWorks network.
CHILLED CEILING CONTROLLER
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EXCEL10 CHILLED CEILING CONTROLLER LNS PLUG-INS USER GUIDE
Table 8. LonWorks configuration rules and device node numbers.
One LonWorks Segment Example Maximum Number of Nodes Equals 62
Maximum number of Excel 10 Controllers 60 nodes (T7460/T7560/T7770 wall modules are not
LonWorks nodes)
Total 62 nodes
Two LonWorks Segments Example Maximum Number of Nodes Equals 125
Maximum number of Excel 10 Controllers in segment number one 60 nodes (T7460/T7560/T7770 wall modules are not
LonWorks nodes)
Maximum number of Excel 10 Controllers in segment number two 60 nodes (T7460/T7560/T7770 wall modules are not
LonWorks nodes)
Total 125 nodes
The maximum length of a FTT LonWorks 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 LonWorks 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 Router to partition the
system into two segments.
In addition, all LonWorks segments require the installation of
a Bus Termination Module. For a FTT LonWorks 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 LonWorks
Termination Module subsection in Application Step 4 for more
details.
encoding. Wire the LonWorks network using level IV 22 AWG
or plenum rated level IV 22 AWG nonshielded, twisted pair,
solid conductor wire as the recommended wire size (see
Table 10 for part numbers). A FTT LonWorks 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 LonWorks terminals are connected to
each wire of the twisted pair.
LonWorks 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 LonWorks 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.
Step 3. Lay Out Communications and Power
Wiring
LonWorks Layout
The communications bus, LonWorks, is a 78-kilobit serial link
that uses transformer isolation and differential Manchester
Fig. 10. LonWorks wiring layout for one daisy-chain network segment.
74-3332-2
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EXCEL10 CHILLED CEILING CONTROLLER LNS PLUG-INS USER GUIDE
Fig. 11. LonWorks wiring layout for two daisy-chain network segments.
Fig. 12. Free topology LonWorks layout examples.
NOTE: See the LonWorks Termination Module section for
additional details.
IMPORTANT
Notes on Communications Wiring:
• All field wiring must conform to local codes and
ordinances.
• Do not use different wire types or gauges on the
same LonWorks segment. The step change in
line impedance characteristics would cause
unpredictable reflections on the bus. When using
different types is unavoidable, use a Q7751A
Router at the junction.
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EXCEL10 CHILLED CEILING CONTROLLER LNS PLUG-INS USER GUIDE
• Do not use shielded cable for LonWorks 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 LonWorks cable.
• Make sure that neither of the LonWorks wires is
grounded.
Power Wiring
A power budget must be calculated for each Excel 10 W7763
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 W7763 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 W7763 Excel 10 Chilled Ceiling Controller.
Assume a W7763 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 W7763 0.5 W7763
Chilled Ceiling 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
W7763C,D,E Excel 10 Chilled Ceiling 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, that 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
2
) 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 assure 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
2
mm
) wire has a resistance of 2.57 ohms per 1000 ft
which, 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
2
mm
) 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 CHILLED CEILING CONTROLLER LNS PLUG-INS USER GUIDE
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 W7763 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.
If the W7763 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
IMPORTANT
Notes on power wiring:
• All field wiring must conform to local codes and
ordinances or as specified on installation wiring
diagrams.
• To maintain NEC Class 2 and UL ratings, the
installation must use transformers of 100 VA or less
capacity.
• For multiple controllers 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 W7763 Controller (which has Triac outputs),
all output devices must be powered from the same
transformer as the one powering the W7763
Controller.
• Use the heaviest gauge wire available, up to
14 AWG (2.0 mm
(1.0 mm
connections.
2
) for all power and earth ground
• To minimize EMI noise, do not run Triac and/or relay
output wires in the same conduit as the input wires
or the LonWorks communications wiring.
• Unswitched 24 Vac power wiring can be run in the
same conduit as the LonWorks cable.
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 W7763 Chilled Ceiling Controller are shown in
Fig. 14. Table 11 gives additional details for output
connections.
NOTE: For field wiring, when two or more wires are to be
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.
Table 10 lists wiring types, sizes, and length restrictions for
Excel 10 Chilled Ceiling Controller products.
transformer.
2
) with a minimum of 18 AWG
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EXCEL10 CHILLED CEILING CONTROLLER LNS PLUG-INS USER GUIDE
Table 10. Field wiring reference table (US part numbers shown).
Wire
Function
LonWorks
(Plenum)
LonWorks
(Non-
Recommended
Minimum Wire
Size AWG
2
(mm
)
Construction
22 AWG Twisted pair solid conductor,
nonshielded.
22 AWG Twisted pair solid conductor,
nonshielded.
plenum)*
Input
Wiring
Sensors
Contacts
14 to 20 AWG
(2.0 to 0.5 mm
Multiconductor (usually five-
2
)
wire cable bundle). For runs
>100 ft (30 m) twisted pair or
shielded cable is
recommended.
Output
Wiring
Actuators
Relays
14 AWG (2.5
2
mm
)
(18 AWG (1.0
2
mm
) acceptable
Any pair nonshielded (use
heavier wire for longer runs).
for short runs)
Power
Wiring
14 AWG
(2.5 mm
2
Any pair nonshielded (use
)
heavier wire for longer runs).
NOTE: PVC wire must not be used where prohibited by local fire regulations.
W7763 Controller
Fig. 16 illustrates W7763 Controller terminal block
assignments and wiring for a sample Chilled Ceiling
installation. All connections are made at terminal blocks.
Specification
or
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 TWIST ED 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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