ComfortNET CTK04 User guide

ComfortNet™ CTK04 Communicating Thermostat
With wireless accessories
System
Installation
Guide
Modulating control for up to 4 Heat/2 Cool communicating heat pump systems or up to
3 Heat/2 Cool communicating gas heat, electric cooling systems for residential and
commercial applications.
Installation guide for:
Quick start guide
• ComfortNetCTK04
CommunicatingThermostat
• PortableComfortControl
• WirelessOutdoorSensor
• WirelessIndoorSensor
• RedLINK™InternetGateway
• Entry/ExitRemote
• VentBoostRemote
1 Installthermostat ..........................................................page 4
2 Poweroptionalaccessories ...................................................7
3 Setupthermostat ...................................................................8
4 Linkoptionalaccessories ......................................................9
5Mount optional accessories.................................................11
6 Installeroptions ...................................................................12
 ComfortNet™UserMenu ....................................................13
Device replacement and specifications ..........................21-23
DISCONNECT POWER BEFORE INSTALLATION. Can cause electrical shock or equipment damage.
MERCURY NOTICE: If this product is replacing a control that contains mercury in a sealed tube, do not place the old control in
the trash. Contact the Thermostat Recycling Corporation at www.thermostat-recycle.org or 800-238-8192 for information on how and
where to properly and safely dispose of your old thermostat.
Must be installed by a trained, experienced technician. Read these instructions carefully. Failure to follow these
instructions can damage the product or cause a hazardous condition.
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System Installation Guide
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69-2688—07 I/O-CHTSTAT03
The ComfortNet advantage
ThepremiumHoneywellComfortNet™controlsystemiseasytouse,energy-
efficient,reliableandensuresthesystemissetupproperly.Advancedoperating
algorithmsbuiltintothecontroldeliversefficientequipmentoperationwhileproviding
optimalcomfort.TheHoneywellComfortNetCommunicatingthermostatisdesigned
toregulateandcommunicatewiththecentralheatingandcoolingequipmentandhas
theabilitytoshareinformationsotheuserwillenjoyefficient,economicalcomfort
throughout the home.
RedLINK™ Compatible
RedLINKaccessoriesincludetheWirelessOutdoorSensor,PortableComfortControl
(PCC),RedLINKInternetGateway,WirelessIndoorSensor,TrueSTEAM™humidifier
withWirelessAdapter,VentBoostRemoteandEntry/ExitRemote.
Customizable Service Reminders
Setupto10servicereminders.Choosefrompre-setoptionsorcustomizeyourown.
Pre-setreminderoptionsincludefilterreplacement,humidifiermaintenance,dehu-
midifierfilter,ventilatorfilter,UVbulbreplacement,annualservice,springservice,
fallserviceandwarrantyexpiringsoon.Remindersbasedonthedateoroutdoor
temperaturewillbedisplayedonthethermostat'smainscreenalongwithpre-setor
custom instructions.
User Interactions Log
Theinteractionlogstoreshistoryofthermostatsettingchangesincludingtempera-
ture,systemandinstallersetup.Youcanusetheinteractionlogtosavetimeby
determining if the issue is a system error or an accidental user error.
Configurable for Residential and Light Commercial Applications
OnethermostatdoesitalltomeettheneedsofResidentialandLightCommercial
applications.SimplyselectResidentialorCommercialduringtheinstallersetup.If
Commercialisselected,thethermostatwillusecommerciallanguage,meetbuilding
codes and offer 365 day holiday scheduling.
USB Port
Visithttp://thermostatsetup.honeywell.comtoenteryourdealerinformationandsave
toaUSBstick.Thenloadyourdealerinformationandlogotomultiplethermostats.
Aftersettingupathermostat,saveInstallerSetup,Holiday/EventSchedulerand
CustomReminderstoaUSBstick.Thenloadthisinformationtomultiplethermostats.
TousetheUSBport,insertaUSBstickinthebottomofthethermostat.Thenselect
theitemyouwouldliketoloadorsave.
Selectable Sensors
WhenpairedwithaWirelessIndoorSensor(s)youhavetheabilitytochoosewhich
sensor(s)tousefortemperature,humidificationanddehumidification.Theycanbe
usedincombinationfortemperatureaveraging—orindividually—toconditionhumidity
levels in separate spaces.

CTK04 ComfortNet™ Communicating Thermostat
3I/O-CHTSTAT03 69-2688—07
Installation
Thisbookletcontainsinstallationinstructionsandinformationonthethermostatand
wirelessaccessories.Separateinstallationinstructionsforthefurnaceorairhandler
andoutdoorACcondensingunitorheatpumpareprovidedwiththeappropriate
equipment.ThisthermostatisdesignedexclusivelyforusewiththeComfortNetcom-
municating system.
Valid System Configurations
Thiscontrolmayonlybeusedwithcertainsystemconfigurations.Validsystemcon-
figurationsforwhichthiscontrolcanbeusedare:
• AcommunicatingairhandlermatchedwithacommunicatingoutdoorAC
condensing unit.
• Acommunicatingairhandlermatchedwithacommunicatingoutdoorheatpump
unit.
• AcommunicatingfurnacematchedwithacommunicatingoutdoorACcondensing
unit.
• Acommunicatingfurnacematchedwithacommunicatingoutdoorheatpumpunit.
• Acommunicatingfurnacematchedwithanon-communicatingsinglestageAC
condensing unit.
Installing Thermostat
1. RemoveandinventoryallComfortNetcomponents.TheCTK04containstheComfortNetcommu-
nicatingthermostat,lithiumcoincellbattery,wallmountingscrewsandanchors,systeminstalla-
tionguide,operatingmanual,transformerandawiringsetthatincludestwoterminalblocks,two
sheetmetalscrewsandwires.
2. Carefullyseparatethethermostatbodyfromthethermostatbase.
3. Placebaseatinstallationlocationandmarkmountingholelocationsonwallusingbaseasa
template.SeeThermostatMountingsectiononnextpageforoptimalmountinglocation.
4. Drillmountingholes.Drill3/16"holesfordrywalland7/32"holesforplaster.
5. Attachbasefirmlytowallusingtwomountingscrews.Levelingisforappearanceonlyandwill
not affect thermostat operation.
6. Connectwirestoterminalblockonbase.
7. 18AWGsolidwireisrecommended.
8. Pushexcesswireintowallandplugholewithafireresistantmaterial(suchasfiberglassinsula-
tion)topreventdraftsfromaffectingthermostatoperation.
9. Insertcoincellbatteryinthebackofthethermostat.
10. Carefullylineupthethermostatwiththebaseandsnapintoplace.
HIGH
VOLTAGE
TRANSFORMER LOW
VOLTAGE CONNECTED
TO R AND C
TERMINALS
CONNECT 2-WIRES TO
INDOOR UNIT
REMOVE AND INVENTORY ALL
COMFORTNET™COMPONENTS
REMOVE OUTDOOR UNIT
COVER AND 7-PIN
CONNECTOR
NOTE: THE CTK04 CONTAINS THE THERMOSTAT, LITHIUM COIN CELL BATTERY,
WALL MOUNTING SCREWS AND ANCHORS, SYSTEM INSTALLATION GUIDE,
OPERATING MANUAL, TRANSFORMER AND A WIRING SET THAT INCLUDES
TWO TERMINAL BLOCKS AND WIRES.
P/N F0430675005
INSTALL HVAC COMPONENTS
GAS
FURNACE
AIR
HANDLER
TERMINALS 1 & 2 ARE
COMMUNICATIONS
WIRES. THEY SHOULD
NEVER BE CONNECTED
TO THE 24 VAC R&C
POWER SUPPLY
TERMINALS.
CONNECT 4-WIRES
FROM STAT AND
2 WIRES FROM
OUTDOOR UNIT
P/N F0430679005
P/N F0430673005
CONNECT TO THE OUTDOOR UNIT
2-WIRE/TRANSFORMER
CONNECTION
CONNECT HIGH VOLTAGE TRANSFORMER LEADS TO L1
AND L2 MALE SPADE TERMINALS ON CIRCUIT BOARD.
DO NOT CONNECT R AND C BETWEEN THE INDOOR UNIT
AND OUTDOOR UNIT. SEE PAGE 5.
INSTALL THERMOSTAT ON INTERIOR WALL
NOTE: THERMOSTAT WILL
AUTOMATICALLY CONFIGURE
TO THE SYSTEM ONCE HIGH
VOLTAGE POWER IS
APPLIED TO THE
INDOOR AND
OUTDOOR
EQUIPMENT.
M33487B
1REMOVE 9-PIN CONNECTOR
FROM FURNACE OR AIR
HANDLER CONTROL
23
4
56
AIR CONDITIONER
OR HEAT PUMP
AIR CONDITIONER
OR HEAT PUMP
TRANSFORMER
ADDITIONAL TRANSFORMER
IS NOT REQUIRED FOR
INVERTER/VARIABLE SPEED
OUTDOOR COMMUNICATING
UNITS.
ADDITIONAL TRANSFORMER
IS REQUIRED FOR 2-STAGE
OUTDOOR COMMUNICATING
UNITS.
LOW (24 VAC)
VOLTAGE

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69-2688—07 I/O-CHTSTAT03
Install thermostat
1
Thermostat Mounting
Mountthethermostatapproximately5feetfromtheflooronaninteriorwallusingthe
includedscrewsandanchors.Drill3/16"holesfordrywalland7/32"holesforplaster.
Donotinstallthethermostatwhereitcanbeaffectedby:
• Draftsordeadspotsbehinddoorsandincorners.
• Hotorcoldairfromducts.
• Radiantheatfromsunorappliances.
• Concealedpipesandchimneys.
• Unheated(uncooled)areassuchasanoutsidewall.
Terminal Functions:
1 - Data 1
2 - Data 2
R-24voltpower
C - 24 volt common
Wire Gauge:
18gaugewireisrecommended.MaximumwiredistancebetweentheComfortNet
thermostatandtheIFCshouldnotexceed100feetusing18gaugewire.
MCR29241
MCR33170
1
2
R
C
MCR33171
1
2
R
C

CTK04 ComfortNet™ Communicating Thermostat
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Install thermostat
1
Wiring Thermostat, Indoor Unit and Outdoor Unit
Wire Thermostat to Indoor Unit
Connect1,2,RandCfromthethermostatto1,2,RandCattheIndoorUnit.
Wire Outdoor Unit
Connectwires1and2fromtheIndoorUnitto1and2attheOutdoorUnit.Installthe
transformerprovidedandconnecttoRandCattheOutdoorUnit.(NOTE:installing
theadditionaltransformerisNOTrequiredforinverter/variablespeedoutdoorcom-
municatingunits.AdditionaltransformerISrequiredfor2-stageoutdoorcommunicat-
ingunits.)DoNOTconnectRandCbetweentheIndoorUnitandOutdoorUnit.See
below.
CTK04
INDOOR
BOARD TERMINAL
CONNECTIONS
R
C
1
2
24VAC (HOT)
24VAC
(COMMON)
DATA 1
DATA 2
L1
L2
24VAC 240V
OUTDOOR
BOARD TERMINAL
CONNECTIONS
OUTDOOR
TRANSFORMER
INSTALLING THE ADDITIONAL TRANSFORMER IS NOT REQUIRED FOR INVERTER/VARIABLE
SPEED OUTDOOR COMMUNICATING UNITS. ADDITIONAL TRANSFORMER IS REQUIRED FOR
2-STAGE OUTDOOR COMMUNICATING UNITS.
R
C
1
2
R
C
1
2
M33168C
1
1

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69-2688—07 I/O-CHTSTAT03
M32940
[If no wireless accessories are used, skip to Section 3.]
Portable Comfort Control
Install 2 fresh AAA alkaline batteries Install 3 fresh AA alkaline batteries
Outdoor air sensor Indoor air sensor
Install 2 fresh AA lithium batteries
Power optional accessories
2
TheHoneywellRedLINKInternetGatewaygivesyourcustomersremoteaccessto
homeclimate-controlsystemsfromanylocationwithInternetaccess.
UsingaWebbrowser,userscanreviewandadjustindoortemperature,
systemmodeandothersettings.TheGatewaycanalsosendalertstoasmanyas6
emailaddressesifaproblemoccurs.
RedLINK™Internet Gateway
Connect power cord to
an electrical outlet not
controlled by a wall switch
Connect RedLINK Gateway to a
router or modem with Ethernet
cable (RJ45).
MCR32937 MCR32938 MCR32939

CTK04 ComfortNet™ Communicating Thermostat
7I/O-CHTSTAT03 69-2688—07
Power optional accessories
2
TrueSTEAM
ConnecttheABCDterminalsbetweenTrueSTEAMandtheTHM4000Wireless
Adapter.
AdjusttheDIPSwitchesonTrueSTEAMasfollowswhenusingtheWirelessAdapter:
DIP3:UP
DIP4:UP
DIP5:DOWN THM4000R1000
Tr ueSTEAM
MCR31476
6
543
2
ON
OFF
1
Entry/Exit Remote or Vent Boost Remote
1 Removethecover.
2 InserttheCR2450coincellbattery(included)into
theslotatthebottomoftheremote.Seepolarity
markingontheremote.
3 TheLEDwillbrieflyflashgreen.Ifitflashesred,
batteryisnotgood.
MCR33269

System Installation Guide
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69-2688—07 I/O-CHTSTAT03
Setup thermostat
3
Initial Power Up
1 TurnonACpowertothesystem.
2 SelectLanguage.PressNext.
3 SelectApplication(Residentialor
Commercial).PressNext.
Thethermostatwillautomaticallyiden-
tifytheComfortNetcommunicating
equipmentinstalledandthenyouwillbe
promptedtoaddRedLINKaccessories
(page9)andsetuptheInstallerOptions
(page12).
4 EnteraDeviceName.PressNext.

CTK04 ComfortNet™ Communicating Thermostat
9I/O-CHTSTAT03 69-2688—07
MCR32935
MCR32934
WhiletheAddDevicescreenisdisplayed
on the thermostat, press and release the
CONNECTbuttononeachwirelessdevice,as
describedbelow.Accessoriesneedtobeat
least2feetawayfromthethermostatduring
thelinkingprocess.
Ifyouneedtoreturntothe"AddDevice"screentoadddeviceslater,pressMENU
andscrolldowntopressINSTALLER OPTIONS.Enterthedatecode(password)when
prompted.Thedatecodeisprintedonthebackofthethermostat;orpressMENU >
EQUIPMENT STATUStofindthedatecode.Afteryouenterthepassword,scrolldownto
press WIRELESS DEVICE MANAGER and then select ADD DEVICE.
MCR28847A
Link optional accessories to wireless network
4
Wireless outdoor sensor
Wireless indoor sensor
Press and release CONNECT. After
a short delay the thermostat will
display "Wireless Outdoor Sensor
added" on the Add Device screen.
Press and release CONNECT.
After a short delay, the status light
will glow green for 15 seconds.
If the status light turns red, the sensor did not link with the thermostat.
Battery level indicators (when batteries are inserted)
Good: Status light flashes green for 5 seconds.
Low: Status light flashes red for 5 seconds. Use fresh batteries.
Battery level indicators (during use)
Good: Status light remains off.
Low: Battery power will be depleted in about 2 months. Thermostat displays Low
Battery warning. Status light remains off.
Critical: Battery power will be depleted in about 2–3 weeks. Status light flashes red.
Press DONE after all devices have been linked
When power is interrupted, the equipment and the RedLINK
accessories will automatically restore communication after power
resumes.
If you have both a wired and wireless outdoor sensor installed, the
thermostat displays the reading from the wireless outdoor sensor.
The thermostat can use up to 6 optional
wireless sensors.

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69-2688—07 I/O-CHTSTAT03
Entry/Exit Remote or Vent Boost Remote
Press and release CONNECT button.
TrueSTEAM
Press and release the CONNECT button on the THM4000 Wireless Adapter. After a short delay, the CONNECTED status light will glow
steady green..
Link optional accessories to wireless network
4
MCR32943
RedLINK Internet Gateway
Press and release the button on the bottom of the Internet
Gateway. After a short delay, the RedLINK status light will glow
steady green.
The Internet Gateway must be registered online before
use at www.mytotalconnectcomfort.com. Enter the MAC
ID and MAC CRC numbers located on the bottom of
the Internet Gateway. For additional information, see
instructions provided with the device.
MCR32942
CONNECT
WIRELESS SETUP
Portable Comfort Control
The linking procedure will time out if there is no keypress for 30 minutes. To begin again,
press and hold in the lower right corner of the screen until the display changes (about 3
seconds).
Press CONNECT on the Portable Comfort Control display screen. Press DONE when the
screen displays "Connected." Press NO at the next screen to save and exit. (Or press
YES to link another thermostat.)
Error messages:
E1 29 Incompatible device cannot be connected.
E1 34 Low RF signal. Move device to a different location and try
again.
E1 38 Make sure the thermostat is in Wireless Setup mode,
and the Portable Comfort Control is at least 2 feet away.
MCR33096
After a short delay, the status light will glow
green for 15 seconds. If the status light
turns red, the remote did not link with the
thermostat for the connection process.

CTK04 ComfortNet™ Communicating Thermostat
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Mount optional accessories
1 Mountthesensoronaverticalexterior
wall,atleast6inchesbelowany
overhang. Choose a location protected
from direct sunlight.
2 Placesensorsecurelyinbracket,facing
awayfromwall.
5
M28491
M28849A
[If no sensors are used, skip to Section 6.]
To install outdoor air sensor
To install indoor air sensor
To install Entry/Exit Remote or Vent Boost Remote
1 Removethewallplateandmountit4
to6feetabovetheflooronaninterior
wall.Drill3/16-inchholesfordrywall,
7/32-inch for plaster.
2 Attachsensorsecurelytowallplateas
shown.
Mounting the remote is optional.
1 Removethefrontcoverfromthe
remote.
2 Useprovidedscrewsandwallanchors
tofastentheremotetothewall.Drill
3/16-inchholesfordrywall,7/32-inch
for plaster.
3 Replacethecoverontheremote.
M32936B
M33095
Do not install the indoor air sensor where it can be affected by:
• Drafts or dead spots behind doors and in corners.
• Hot or cold air from ducts.
• Radiant heat from sun or appliances.
• Concealed pipes and chimneys.
• Unheated (uncooled) areas such as an outside wall

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69-2688—07 I/O-CHTSTAT03
Installer options (ISU)
6
Create Setup: Press CREATE SETUP to set all system settings one
by one.
View/Edit Current Setup: Press VIEW/EDIT CURRENT SETUP to
select a specific function and make quick changes.
Installer Test: Press INSTALLER TEST to quickly determine if the
heat, cool, fan and thermostat are operating properly. Minimum off
timers are ignored during the test.
Data Logs: Press DATA LOGS to view the Alerts Log and User
Interactions Log.
Wireless Device Manager: Press WIRELESS DEVICE MANAGER
to add or remove wireless accessories.
Advanced Options: Press ADVANCED OPTIONS to setup the
thermostat using a USB device or to restore the thermostat to the
factory default settings. See page 2 for more information on the USB
port.
TIP: You can use the thermostat USB port to download all system configuration and installer options, including your company
name and contact information.You can upload this data to each thermostat you install, to save time.
Tosetupthethermostat,pressMENUandscrolldowntopressINSTALLER OPTIONS.
Enterthedatecode(password)whenprompted.Thedatecodeisprintedonthe
backofthethermostat;orpressMENU > EQUIPMENT STATUS to find the date code.
Afteryouenterthepassword,pressCREATE SETUP to setup the thermostat.
Abriefsummaryofinstalleroptionsfollows.Youcandownloadacompletelistofall
optionsathttp://customer.honeywell.com.
1000 Language B
1010 Residential/Commercial B
1030 Device Name B
1030 Device Name on Home Screen C
1040 Programmable/Non-programmable B
1050 Fahrenheit/Celsius B
1060 Outdoor Air Sensor B
2000 Heating System Type B
2010 Heating Equipment Type B
2070 Heat Stages B
2070 Cool/Compressor Stages B
2070 Backup Heat Stages B
2180 Backup Heat Type B
2190 System Zoning - Backup Heat Control B
3000 Manual/Auto Changeover B
3000 Auto Changeover Deadband B
3010 Temperature Control Options B
3020 Finish With High Cool Stage B
3021 Finish With High Heat Stage B
3030 Staging Control - Cool Differentials B
3050-3060 Staging Control - Heat Differentials B
3090 Staging Control - Backup Heat Differentials B
3110 Backup Heat Upstage Timer B
3120 Outdoor Compressor Lockout B
3120 Outdoor Backup Heat Lockout B
3140 Cool/Compressor Cycles Per Hour B
3150 Heat Cycles Per Hour B
3160 Backup Heat Cycles Per Hour B
3170-3190 Cooling Derivative, Integral, Throttling range C
3200-3220 Heating Derivative, Integral, Throttling range C
3240 Minimum Compressor Off Time B
3260 Extended Fan Run Time in Cool B
3260 Extended Fan Run Time in Heat B
4000 Number of Schedule Periods B
4010 Pre-occupancy Purge Duration C
4020 Override: Standard or Initiate Occupancy C
4030 Override Duration C
4050 Minimum Recovery Settings - Heat C
4060 Maximum Recovery Settings - Heat C
4070 Minimum Recovery Settings - Cool C
4080 Maximum Recovery Settings - Cool C
4090 Adaptive Intelligent Recovery R
4100 Minimum Cool Setpoint B
4100 Maximum Heat Setpoint B
4110 Keypad Lockout B
4120 Entry/Exit Remote -
Home/Occupied Cool Setpoint B
4120 Entry/Exit Remote -
Home/Occupied Heat Setpoint B
4130 Entry/Exit Remote -
Away/Unoccupied Cool Setpoint B
ISU Function ISU Function
R: Residential C: Commercial B: Both

CTK04 ComfortNet™ Communicating Thermostat
13 I/O-CHTSTAT03 69-2688—07
ComfortNet User Menu
PressMENU > COMFORTNET USER MENU
AdditionalequipmentinformationisfoundintheComfortNetUserMenu.PressMENU
andscrolldowntopressCOMFORTNET USER MENU.Enterthedatecode(password)
whenprompted.Thedatecodeisprintedon
thebackofthethermostat;orpressMENU >
EQUIPMENT STATUS to find the date code.
Afteryouenterthepassword,selectthe
equipmenttype(furnace,airhandler,
airconditioner,heatpump)toviewthe
specifications.
Eachequipmenttypeisdividedintocategories
whichmayinclude:(Notallmenuoptionslisted
heremaybeavailable.Additionalmenuoptionsmaybedisplayedonthethermostat.)
4130 Entry/Exit Remote -
Away/Unoccupied Heat Setpoint B
4140 Entry/Exit Remote -
Vacation/Holiday Cool Setpoint B
4140 Entry/Exit Remote -
Vacation/Holiday Heat Setpoint B
5040 Indoor Sensors Used for Temperature Control B
7000 Filter Type B
7020 Number of Air Filters B
7110 Air Filter Replacement Reminder B
7110 Air Filter 2 Replacement Reminder B
7120 EAC Cell Cleaning Reminder B
7120 EAC Pre-Filter Cleaning Reminder B
7120 EAC Post-Filter Replacement Reminder B
8000 Humidifier Type B
8010 Indoor Sensor Used for Humidification Control B
8050 Humidification - Window Protection B
8060 System Modes Allowing Humidification B
8070 Humidification Control B
8100 Clean Tank / Water Filter Replacement Reminder B
8100 Humidifier Pad Replacement Reminder B
9000 Dehumidification Equipment B
9010 Indoor Sensor Used for Dehumidification Control B
9020 Humidity Sensor Displayed on the Home Screen B
9070 Dehumidification - Overcooling Limit R
9080 Dehumidification Control C
9090 Dehumidification Minimum On Time C
9100 High Humidity Comfort Reset Setting C
9180 Dehumidification Away Mode B
9190 Dehumidification Away Mode - Fan Control B
9200 Dehumidification Away Mode -
Low Limit Temperature B
9200 Dehumidification Away Mode -
Temperature Setting B
9200 Dehumidification Away Mode -
Dehumidification Setting B
9210 Dehumidifier Filter Replacement Reminder B
10000 Ventilation Type B
10050 Ventilation Control Method B
10090 Number of Bedrooms R
10090 Size of House R
10100 Enter Equipment Ventilation Rate R
10120 Ventilation Percent On Time B
10170 Ventilator Filter Cleaning Reminder B
11000 Number of UV Devices B
11050 UV Bulb Replacement Reminder B
11050 UV Bulb 2 Replacement Reminder B
12000 Installer Custom Reminders B
14000 Clock Format B
14010 Daylight Saving Time B
14020 Indoor Temperature Display Offset B
14020 Indoor Humidity Display Offset B
15000-15020 Dealer name, phone, email, website, message B
Installer options (ISU)
6
ISU Function ISU Function
• Configuration: Provides information regarding the setup of the equipment. An example of configuration data is the number
of cooling stages for an AC condensing unit.
• Diagnostics: Provides a fault history of the equipment and allows the installer to clear the fault history.
• Identification: Provides the model and serial number of the equipment and software revision information.
• Sensors: Provides the sensor data of the equipment. In some instances, it may allow the installer to setup or turn off a
sensor.
• Setup: Allows the installer to change the settings of the equipment.
• Status: Provides the current status of the equipment.
Seeequipmentinstallermanualforspecificsubmenuoptionsavailablewithineach
category.Bothindoor(AirHandlerandFurnace)andoutdoor(AirConditionerand
HeatPump)unitswillhavedifferentsetsofsubmenus.

System Installation Guide
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69-2688—07 I/O-CHTSTAT03
Wiring humidifier to the IFC
Wiring TrueEASE to IFC
Wiring TrueSTEAM to IFC
To change installer setup (ISU) information, see pages 12-13.
IFC
1
2
R
C
THERMOSTAT
1
2
R
C
HUM
HUM
1. WIRE THERMOSTAT AND TrueSTEAM AS SHOWN.
2. SET THERMOSTAT ISU 8000 TO “STEAM”.
3. SET TrueSTEAM DIP SWITCHES AS SHOWN (3 DOWN, 4 UP, 5 DOWN).
NOTE
FAN INTERLOCK IS HANDLED BY THE COMFORTNET COMMUNICATION.
TrueSTEAM DIP SWITCHES
TRUESTEAM
MCR33172
24 V
24 V
HUM
HUM
C
GT
R
RT
GF
EXT
6
5
43
2
ON
OFF
1
AFS MONITOR RECOMMENDED
IFC
1
2
R
C
THERMOSTAT
1
2
R
C
HUM
HUM
1. WIRE THERMOSTAT AND TrueEASE AS SHOWN.
2. SET THERMOSTAT ISU 8000 TO “BYPASS OR FAN POWERED”.
3. SET TrueEASE DIP SWITCHES AS SHOWN :
• TOP DIP SWITCH – SET TO THE RIGHT
• BOTTOM DIP SWITCH – SET TO THE LEFT
NOTE
FAN INTERLOCK IS HANDLED BY THE COMFORTNET COMMUNICATION.
MCR33173
TrueEA SE DIP SWITCHES
BYPASS
HUM
CONTROL
FAN
POWERED
TrueEASE

CTK04 ComfortNet™ Communicating Thermostat
15 I/O-CHTSTAT03 69-2688—07
Heat pump with outdoor temperature lockouts
Outdoortemperaturelockoutsareoptional.SeeInstallerSetup
options(ISU3120).
Heat pump only
Heatpumpwithbackupheatasneeded*
Backupheatonly
Heat pump only
Heatpumporbackupheatoperates*
Backupheatonly
Outdoor temperatureOutdoor temperature
Backup heat lockout
Backup heat lockout
Compressor lockout
Compressor lockout
* No backup heat unless indoor temperature drops to selected Backup Heat Differential setting, or Backup Heat
Upstage Timer expires. Heat pump stays ON when backup heat turns on.
* No backup heat unless indoor temperature drops to selected Backup Heat Differential setting, or Backup
Heat Upstage Timer expires. Heat pump turns OFF when backup heat turns on.
Electric - Backup heat allowed to run with heat pump
Fossil Fuel - Backup heat NOT allowed to run with heat pump

System Installation Guide
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69-2688—07 I/O-CHTSTAT03
Backup heat differential and upstage timer
Basic and Advanced Temperature Control Options (ISU 3010)
Abackupheatdifferentialandbackupheatupstagetimercanbesetonheatpump
systemswithbackupheat.Seeinstallersetupoptions(ISU3090-3110).
Normal operation
WhentheBackup Heat DifferentialissettoComfort,thethermostatusesbackup
heatasneededtokeeptheindoortemperaturewithin1°F(0.5°C)ofthesetpoint.
WhentheBackup Heat Differentialissetto2°Forhigher,backupheatisnotused
unless the indoor temperature drops to the Backup Heat Differential setting or the
Backup Heat Upstage Timerexpires,whicheveroccursfirst.Theupstagetimerstarts
whenthehigheststageofthepreviousequipmenttypeturnson.
Manual temperature change
WhentheBackup Heat DifferentialissettoComfort,thethermostatusesbackup
heatasneededtokeeptheindoortemperaturewithin1°F(0.5°C)ofthesetpoint.
WhentheBackup Heat Differentialissetto2°Forhigher,iftheheatpumpismak-
ingprogressasexpected,backupheatwillnotbeusedtoreachthenewsetpoint.
Settoahighernumbertouselessbackupheat(agreaterdifferencebetweenthe
currentindoortemperatureandthenewsetpointisrequiredtoturnonbackupheat).
Seenotesbelow.
Programmed recovery
Iftheheatpumpismakingprogressasexpected,backupheatwillnotbeusedto
reachthesetpointofthenextprogramperiod.Backupheatisalways restricted dur-
ingaprogrammedrecoverywhentheAdaptiveIntelligentRecoveryfeatureisused.
Seenotebelow.
Basic Options:TheInstallerSetupdisplaysbasictemperaturecontroloptions
whichincludeBackupHeatDifferential,BackupHeatUpstageTimerandOutdoor
TemperatureLockouts.Note:OutdoorTemperatureLockoutsonlyapplytoHeat
Pumpapplications.
Advanced Options:TheInstallerSetupdisplaysbothBasicandAdvancedOptions.
AdvancedtemperaturecontroloptionsincludeFinishWithHighCoolStage,Finish
WithHighHeatStage,TemperatureDifferentialsettingsbetweenallstagesand
CycleRatesettingsperstage.
During a programmed recovery (or when the temperature setpoint is changed by the user), the thermostat waits to turn on the
backup heat depending on system performance, load conditions and how many degrees the temperature setpoint is changed.
Backup heat will be used ONLY when the temperature is not rising quickly enough to reach the setpoint in a reasonable time.
If the backup heat was used in the last 2 hours because the heat pump was not able to maintain the setpoint, the thermostat
may turn on the backup heat earlier when the user raises the setpoint.
Finish With High Heat or Cool Stage - When a multi-stage heating or cooling system is used, this feature keeps the high stage
of the heating or cooling equipment running until the desired setpoint is reached.

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17 I/O-CHTSTAT03 69-2688—07
Humidification
Thethermostatreadstheindoorhumiditylevelandallowstheusertosetahumidifi-
cationsettingwithorwithoutwindowprotection.
Window Protection
WindowProtectionlimitstheamountofhumiditytopreventfrostorcondensationon
windows.WindowProtection(ISU8050)requiresanoutdoorsensor.
Themaximumhumiditylevelthatisallowed("WindowLimit")isdisplayedonthe
HumidificationSettingsscreen.Thethermostatpreventsfrostorcondensationon
windowsbynotallowingthehumiditytogoabovetheWindowLimitwhenitiscon-
trollingthehumidifier.Thishelpsinformtheuserastowhytheirhumiditysetting
mightnotbereachedattimes.TheWindow
Limitisbasedonthecurrentoutdoortempera-
tureandtheuser'swindowprotectionsetting.
IfWindowProtectionisturnedOff,thether-
mostatcontrolsthehumidityleveltotheuser's
desiredhumiditysetting.Frostorcondensation
mayappearonwindows.
Dehumidification - Residential
Thethermostatreadstheindoorhumiditylevelandallowstheusertosetadehu-
midification setting.
Whensetupfordehumidificationusingthecoolingsystem,anovercoolinglimitcan
besetfrom0Fto3F(ISU9070).Thethermostatusesthecoolingsystemtoreduce
humiditybyloweringthetemperatureupto3Fbelowthecurrentcoolsetpointuntil
the desired humidity level is reached.
To see all dehumidification options, press MENU > INSTALLER OPTIONS > VIEW/EDIT CURRENT SETUP >
DEHUMIDIFICATION.
To see all humidification options, press MENU > INSTALLER OPTIONS > VIEW/EDIT CURRENT SETUP >
HUMIDIFICATION.

System Installation Guide
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69-2688—07 I/O-CHTSTAT03
Dehumidification - Commercial
Thethermostatreadstheindoorhumiditylevelandallowstheusertoseta
dehumidification setting.
Dehumidificationusingthecoolingsystemhasthefollowingmethodsof
dehumidificationcontrol(ISU9080):
Basic:Thisoptionusesthecoolingsystemtoreachthedesiredhumiditylevel.
MinimumOnTimeandHighHumidityComfortResetarenotusedwiththismethod.
Thisoptionshouldonlybeusediftheequipmentcanlowerthefanspeedinacallfor
dehumidification.
Minimum on Time (ISU 9090):Thisoptionensuresthatthecompressorrunslong
enoughtoeffectivelyreducehumiditywhenthecoolingequipmentiscycledon.The
compressorwillrunfortheminimum"ontime"yousetuntilthedesiredhumiditylevel
is reached.
High Humidity Comfort Reset (ISU 9100):Thisoptionusesthecoolingsystem
tolowerthetemperatureupto5Fbelowthecurrentcoolsetpointuntilthedesired
humidityisreached.Thehighhumiditycomfortrangeisfrom1to5F.
High Humidity Comfort Reset with Minimum On Time (ISU 9090 and ISU
9100):Thismethodusesbothoptionsabovetoreducehumiditywhilemaintaininga
comfortabletemperature.
To see all dehumidification options, press MENU > INSTALLER OPTIONS > VIEW/EDIT CURRENT SETUP >
DEHUMIDIFICATION.

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19 I/O-CHTSTAT03 69-2688—07
Dehumidification Away Mode
DehumidificationAwayModeprotectsthehomewhenunoccupiedforlongperiods
oftimeduringhotandhumidweatherbymaintainingthedesiredhumidityand
temperature settings.
TostartDehumidificationAwayMode,press
Menu,thenpressDehumidificationAwayMode.
Thethermostatautomaticallyfollowssettings
thataresetbythedealerduringinstallersetup.
PressCanceltoendDehumidificationAway
Mode.
Southern Dehumidification Away Mode
Options: (ISU 9180 to 9200)
• Fan:Auto,OnorCirculate
• LowLimitTemperatureSetting:The
thermostatallowsthecoolingsystem
tolowertheindoorairtotheLowLimit
TemperatureSettingtocontrolhumidity.
• TemperatureSetting:Thetemperature
maintainedwhileDehumidificationAway
Mode is active and the desired humidity level is satisfied.
• DehumidificationSetting:ThedesiredhumiditylevelwhileDehumidification
AwayModeisactive.
Ventilation
Ventilation Control Method (ISU 10050)
ThethermostatcancontrolthefantomeeteitherASHRAEorPercentOnTime
settings.IftherequiredventilationhasnotbeenachievedforASHRAEorPercentOn
Timeduringcallsforheatandcool,thethermostatwillforcethefanon.
• ASHRAE:ThethermostatoperatesthefantomeettheASHRAE62.2
ventilationstandardbasedonCFM,numberofbedrooms,andsquarefootage
ofthehouse.ASHRAE62.2canonlybemetifthefanisrunning.Ifthefanis
offforanyreason(setuptoturnOffduringSleepperiod,turnedoffbyuser
etc.),ASHRAE62.2isnotmetduringthosetimes.
• Percent On Time:Thethermostatoperatesthefanbasedonapercentage
enteredintheinstallersetup(ISU10120).Forexample,ifPercentOnTime
issetto50%,thefanwillrunatrandomtimesduringa1hourperioduntilit
reachesa50%runtime(approximately30minutes).Options10%to100%.
To see all ventilation options, press MENU > INSTALLER OPTIONS > VIEW/EDIT CURRENT SETUP >
VENTILATION.

System Installation Guide
20
69-2688—07 I/O-CHTSTAT03
Indoor sensor operation
Temperature control
Thethermostatcanbesettorespondtoits
internal temperature sensor, or to an optional
remoteindoorsensor.Ifmultiplesensorsare
used,thethermostatwillrespondtoanaver-
age of temperatures detected at each sensor.
Humidification control
Ifoptionalremoteindoorsensorsareinstalled,
youcanchoosewhichsensoryouwanttouse
for humidification control. You can use a differ-
ent sensor for dehumidification.
Dehumidification control
Ifoptionalremoteindoorsensorsareinstalled,
youcanchoosewhichsensoryouwanttouse
fordehumidificationcontrol.Forexample,you
can use one sensor for humidification control,
and another for dehumidification.