Download pdf - CDT900 Series Manual

8/13/2019 CDT900 Series Manual

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CDT900 Series Touchscreen Programmable Thermostat

Contents

Application/Features............................................... ................. ................. ........................... 2

Specifications/Ordering Information ..................... ................. ................. ............................. 4Installation ........................................................ .. ................. ...............................................13Wiring ................................................................... ................. ................. ............................ 17Power the Thermostat .................................. ................ ................. ..................................... 34Installer Setup ............................. ................. ................ ...................................................... 47Installer System Test ................. ................. ................ ........................................................ 59

Operation............................. ................. ............... ............................................................... 62Programming .................. ................. ................. .................................................................. 68Troubleshooting ................ ................. ................. ................................................................ 97

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PRODUCT DATAAPPLICATIONThe CDT900 Series Touchscreen Programmable Thermostat is an effortless, 7-Dayprogrammable thermostat that provides universal system compatibility, precise comfortcontrol and is easy-to-program.The CDT900 Series Thermostats provide temperature control for gas, oil, electric and heatpumps for up to 3 heat, 2 cool systems including dual fuel operation plus dehumidificationcontrol.


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Electrical Ratings:

Terminal Voltage (50/60 Hz) Running CurrentW Heating 20 - 30 Vac 02 - 1.0A

W Heating (Powerpile) 750 mV dc 100 mA dc

Y Cooling 20 - 30 Vac .02 - 1.0A

G Fan 20 - 30 Vac 02 - .60A

Temperature Setting Range:Heating: 40F to 90F(4C to 32C).Cooling: 50F to 99F (10C to 37C).

Operating Ambient Temperature:32F to 120F(0C to 49C).

Shipping Temperature:CDT900 Thermostats: -30 F to 150 F(-34.4C to 65.6C).

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Operating Relative Humidity (Non-condensing):CDT900 Series Thermostats: 5% to 90%.

IRS-1: 5% to 95%.ORS-1: 5% to 95%.

Humidity Setting Range (CDT901 models only):Cooling: 40% to 80% RH.

Humidity Display Range (CDT901 models on ly):0% to 99%.

Cycle Rates (at 50% Load):Heating: Selectable 1 - 12 cycles per hour.Cooling: Selectable 1 - 6 cycles per hour.

Clock Accuracy: +/- 1 minute per month.

Batteries:Two replaceable AA alkaline batteries: Power thermostats when 24 Vac common is not used.Non-replaceable lithium battery with ten-year life under normal use to hold calendar and timesettings. Alkaline batteries keep calendar and time after lithium battery is no longerfunctional.

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Cool Indication:CDT900 series Touchscreen Thermostats show "Cool On" on the screen when Cool is

activated.

Heat Indication:CDT900 series Touchscreen Thermostats show "Heat On" on the screen when Heat isactivated.

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ORDERINGINFORMATIONIf you have additional questions, need further information, or would like to comment on ourproducts or services, please write or phone:1. Smart Electric

Attn: Warranty Department12201 NW 107th AveMiami, Fl 33178

2. Call Customer Service at 1-866-591-9898

Auxi liary Heat Indicat ion:CDT900 Touchscreen Thermostats show "Aux Heat On" on the screen when Auxiliary Heatis activated.

Emergency Heat Indication:CDT900 Touchscreen Thermostats show "Heat On" on the screen when Emergency Heat isactivated and the System mode is in the Emer position.

Calibration:CDT900 Touchscreen Thermostats are factory-calibrated and require no field calibration.

Nomenclature:

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Series System Stages Appl icat ion

CDT900CDT901 3H/2C CDT900 - StandardCDT901-Humidity Sensor

Mounting Means:CDT900 Series Touchscreen Thermostat: Mounts directly on the wall in the living spaceusing mounting screws and anchors provided.Outdoor Sensor: Mounts outside of living space with mounting clip and screws provided.Remote Indoor Sensor: Mounts directly on the wall using mounting screws and anchorsprovided.

Dimensions:CDT900 Series Touchscreen Thermostat: see Fig 1.1. CDT900 Outdoor Sensor Mounting Clip: see Fig 2.2. Cover Plate: see Fig 3.3. CDT900 SeriesRemote Indoor Sensor: see Fig. 4

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Fig. 1. Touchscreen Thermostat dimensions in in. (mm).

11

1.17 in.(29.84mm)

5.98 in.(152mm)

4.48in.(114mm)


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Fig. 2. Outdoor Sensor Mounting Clip dimensions in in. (mm).

12

1.49 in.(38mm)

0.17in.(4.2mm)

R1.6in.(4mm

)

1.82 in.(46.3mm)

R0.04

in.(1mm)

R0.098in.(2.5m

m)

1.10in.(28.1mm)

0.62in.(16mm

)

1.56 in .(39.7mm)

0.24 in.(6.2mm)

0.44 in .(11.2mm)

R0.098in.(2.5mm)

0.08 in.(2mm)


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Fig. 3. Cover Plate dimensions in in. (mm).

13

3.29 in.(83.5mm)

0.85 in .(21.5mm)

3.29in.(83.5mm)

5.35 in.(136mm)

4.13in.(105mm)


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INSTALLATIONWhenInstallingthisProduct...1.Read these instructions carefully. Failure to follow the instructions can damage the productor cause a hazardous condition.2.Check the ratings given in the instructions to make sure the product is suitable for yourapplication.3.Installer must be a trained, experienced service technician.4.After completing installation, use these instructions to check out the product operation.

SelectingLocationInstall the thermostat about 5 ft. (1.5m) above the floor in an area with good air circulation ataverage temperature. See Fig. 5.

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 behind the thermostat.

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Fig. 5. Selecting thermostat location.

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5FEET

1.5METERS


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InstallingWallplate

CAUTIONElectrical Hazard.Can cause electrical shock or equipment damage.Disconnect power before wiring.

The thermostat can be mounted horizontally on the wall1.Position and level the wallplate (for appearance only).2.Use a pencil to mark the mounting holes.3.Remove the wallplate from the wall and, if drywall, drill two holes in the wall, as marked. For

firmer material such as plaster, drill two holes. Gently tap anchors (provided) into the drilledholes until flush with the wall.4.Position the wallplate over the holes, pulling wires through the wiring opening. See Fig. 65.Insert the mounting screws into the holes and tighten.

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Fig. 6. Mounting wallplate.

17

WALL

WIRES THROUGH

WALL AND WIRE

SLOT

WALL ANCHORS

M0UNTING

HOLES(2)

M0UNTINGSCREWS(2)


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WIRING(FIG.9- 21)All wiring must comply with local electrical codes and ordinances.1.Select set of terminal identifications (Table 1) that corresponds with system type(conventional or heat pump in Fig. 7).2.Loosen the screws for the appropriate system type selected; see Table 1. See Table 2 forterminal designation descriptions. Insert wires in the terminal block under the loosenedscrew. See Fig. 8.3.Securely tighten each screw.4.Push excess wire back into the hole.5.Plug the hole with nonflammable insulation to prevent drafts from affecting the thermostat.6.See Fig. 9 through 21 for typical wiring hookups.

Fig. 7. Selecting terminal identifications forsystem type.

18

CONVENTIONAL

HEATPUMP

SCREW

TERMINALS

S1 S2 C R RC E L Y2 Y G

S1 S2 C R RC W W2 Y2 Y G

O/B AUX


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IMPORTANT:Use 18 gauge thermostat wire.

Fig. 8. Inserting wires in terminal block.

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Table 2. Terminal Designation Descript ions.

Terminal Designation Description

Rc (see Note 1)

Power for cooling--connect to secondary side of cooling

system transformerR (see Note 1) Power for heating--connect to secondary side of heatingsystem transformer

C (see Note 2) Common wire from secondary side of cooling systemtransformerW Heat relayY Compressor contactorG Fan relayY2 Second stage coolingW2 Second stage heat relayO/B (see Note 3) Changeover valve for heat pump systems

AUX Auxiliary heat relay for heat pump systemsE Emergency heat relay for heat pump systems

L (see note 4) Equipment monitor for heat pump systemsS1, S2 Optional outdoor or indoor remote sensor

NOTES:.1.When sed in a single-transformer system, leave metal jumper wire in place between Rc

and R. If used on a two-transformer system, remove metal jumper wire between Rc and R.2.Common wire is optional when thermostat is used with batteries.3. If thermostat is configured for a heat pump system in the Installer Setup, configurechangeover valve for cool (O-factory setting) or heat (B).4.L terminal is an input (system monitor) when the System mode is in the Heat, Off, Cool or

Auto position. L terminal is a 24 Vac output when System mode is Emergency Heat. Mustconnect the 24 Vac Common when using the L terminal. See LCD Indication section for moredetails.

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1.POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

2. FACTORY INSTALLED JUMPER.3.OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE ON SELECT MODELS. WIRES MUST HAVE A CABLE

SEPARATE FROM THE THERMOSTAT CABLE

Fig. 9. Typical hookup of conventional single-stage heat and cool system with s ingletransformer(1H/1C conventional).

22

CONVENTIONALS1 S2 C R RC W W2 Y2 Y G

OUTDOOR/INDOOR

TEMPERATURE

SENSOR

3

HEATRELAY

OPTIONAL24VAC

COMMON

CONNECTION

RC 1

2

FANRELAY


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1.POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

2.REMOVE FACTORY INSTALLED JUMPER

3.OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE ON SELECT MODELS. WIRES MUST HAVE A CABLE

SEPARATE FROM THE THERMOSTAT CABLE.

Fig. 10. Typical hookup of conventional single-stage heat and cool system with twotransformers (1H/1C conventional).

23


OUTDOOR/INDOOR

TEMPERATURE

SENSOR

3 RC 1

2

FANRELAY

HEATRELAY

R C 1

COMPRESSOR

CONTACTOR

OPTIONAL

24VACCOMMON

CONNECTION


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1. POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED

2. FACTORY INSTALLED JUMPER.

3. OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE ON SELECT MODELS. WIRES MUST HAVE A CABLE


Fig. 11. Typical hookup of heat-only system (1 H conventional).

24


OUTDOOR/INDOORTEMPERATURE

SENSOR

3

HEATRELAY

OPTIONAL

24VAC

COMMON

CONNECTION

R C1

2


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Fig. 12. Typical hookup of heat only system with fan (1H conventional).

25


OUTDOOR/INDOOR

TEMPERATURE

SENSOR

3

HEATRELAY

OPTIONAL24VAC

COMMON

CONNECTION

RC 1

2

FANRELAY


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1. POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED2. FACTORY INSTALLED JUMPER.



Fig. 13. Typical hookup of heat only power to open and power to close zone valve(Series 20) system.

26

OUTDOOR/INDOOR

TEMPERATURE

SENSOR

3

R C 1

2

WBR

TR TRSERIES20

MOTOROR

VALVE



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2. FACTORY INSTALLED JUMPER.3. OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE ON SELECT MODELS. WIRES MUST HAVE A CABLE


Fig. 14. Typical hookup of heat only system with normally open zone valves.

27


OUTDOOR/INDOOR

TEMPERATURE

SENSOR

3

NORMALLYOPEN

ZONEVALVE

OPTIONAL24VAC

COMMON

CONNECTION

R C1

2

4


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2. FACTORY INSTALLED JUMPER.3. OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE ON SELECT MODELS. WIRES MUST HAVE A CABLE


Fig. 15. Typical hookup of cool only system(1C conventional).

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OUTDOOR/INDOOR

TEMPERATURE

SENSOR

3

COMPRESSOR

CONTACTOR

OPTIONAL

24VAC

COMMON

CONNECTION

RC 1

2

FANRELAY

HEATRELAY


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1. POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED2. FACTORY INSTALLED JUMPER.



Fig. 16. Typical hookup of conventional multistage two-stage heating and two-stagcooling in a single-transformer system (2H/2C, 2H/1C or 1H/2C conventional).

29


OUTDOOR/INDOOR

TEMPERATURE

SENSOR

3

OPTIONAL

24VAC

COMMON

CONNECTIONMUSTCOME

FROMTHE

COOLING

TRANSFORMER

2

FANRELAY

HEATRELAY2

HEATRELAY1 COOLRELAY2

COOLRELAY1

R C 1

CONVENTIONAL


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3. OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE ON SELECT MODELS. WIRES MUST HAVE A CABLESEPARATE FROM THE THERMOSTAT CABLE

Fig. 17. Typical hookup of conventional mul tistage two-stage heating and two-stagecooling in a two-transformer system (2H/2C, 2H/1C or1H/2C conventional).

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CONVENTIONAL S1 S2 C R RC W W2 Y2 Y G

OUTDOOR/INDOOR

TEMPERATURE

SENSOR

3

OPTIONAL

24VAC

COMMONCONNECTION

MUSTCOME

FROMTHE

COOLING

TRANSFORMER

RC 1

2

FANRELAY

HEATRELAY1

HEATRELAY2

COOLRELAY2

COOLRELAY1

R C 1


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3"O/B" TERMINAL SET TO CONTROL AS EITHER "O" OR "B" IN THE INSTALLER SETUP4OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE ON SELECT MODELS. WIRES MUST HAVE A CABLE


Fig. 18. Typical hookup of single-stage heat pump with no auxil iary/backup heat (1H/heat pump).

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HEATPUMP


S1 S2 C R RC E L Y2 Y GO/B AUX

OUTDOOR/INDOORTEMPERATURE

SENSOR

4

2

R C 1

CHANGEOVER

VALVECOMPRESSOR

RELAY

FANRELAYOPTIONAL24VAC

COMMON

CONNECTION

3


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3MUST CONNECT THE 24 VAC COMMON WHEN USING L. THE TERMINAL IS SHOWN AS EQUIPMENT MONITOR, CAN ALSO BEUSED AS A 24 VAC OUTPUT. SEE "HEAT PUMP LED" SECTION FOR MORE INFORMATION.

4"O/B" TERMINAL SET TO CONTROL AS EITHER "O" OR "B" IN THE INSTALLER SETUP

5OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE ON SELECT MODELS. WIRES MUST HAVE A CABLE


Fig. 19. Typical hookup of multistage heat pump with no auxil iary/backup heat2H/2C heat um .

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HEATPUMP



OUTDOOR/INDOOR

TEMPERATURE

SENSOR

2

R C 1

CHANGEOVER

VALVE

FANRELAYOPTIONAL

24VAC

COMMON

CONNECTION

5

COMPRESSOR2

COMPRESSOR1

4 3


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3OUTDOORSENSORREQUIREDINSYSTEMWITHFOSSILFUELBACKUPHEATTHATISNOTUSINGANEXTERNALFOSSILFUELKIT4OPTIONALOUTDOORORINDOORREMOTESENSOR.AVAILABLEONSELECTMODELS.WIRESMUSTHAVEACABLESEPARATE FROMTHE

THERMOSTATCABLE

5MUSTCONNECTTHE24VACCOMMONWHENUSINGL.THETERMINALISSHOWNASEQUIPMENTMONITOR,CANALSOBEUSEDAS

A24VACOUTPUT.SEE"HEATPUMPLED"SECTIONFORMOREINFORMATION.

6"O/B"TERMINALSETTOCONTROLASEITHER"O"OR"B"INTHEINSTALLERSETUP.

Fig. 20. Typical hookup of single-stage heat pump with auxiliary/backuheat (2H/1C heat pump). 33

34

HEATPUMP



OUTDOOR/INDOOR

TEMPERATURESENSOR

2

R C 1

CHANGEOVER

VALVE

FANRELAY

OPTIONAL

24VAC

COMMON

CONNECTION

6 5

COMPRESSOR

RELAY

EMERGENCY

HEATRELAYHEAT2RELAY(AUXILIARYHEAT)

EQUIPMENT

MONITOR


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3OUTDOORSENSORREQUIREDINSYSTEMWITHFOSSILFUELBACKUPHEATTHATISNOTUSINGANEXTERNALFOSSILFUELKIT

4OPTIONALOUTDOORORINDOORREMOTESENSOR.AVAILABLEONSELECTMODELS.WIRESMUSTHAVEACABLESEPARATE FROMTHE

THERMOSTATCABLE

5MUSTCONNECTTHE24VACCOMMONWHENUSINGL.THETERMINALISSHOWNASEQUIPMENTMONITOR,CANALSOBEUSEDAS

A24VACOUTPUT.SEE"HEATPUMPLED"SECTIONFORMOREINFORMATION.

6"O/B"TERMINALSETTOCONTROLASEITHER"O"OR"B"INTHEINSTALLERSETUP.

Fig. 21. Typical hookup of mul tistage heat pump with auxil iary/backup heat (3H/2C heapump).

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34

HEATPUMP



OUTDOOR/INDOOR

TEMPERATURE

SENSOR

2

R C 1

CHANGEOVER

VALVE

FANRELAY

OPTIONAL

24VAC

COMMON

CONNECTION

6 5

EMERGENCY

HEATRELAYHEAT2RELAY(AUXILIARYHEAT)

EQUIPMENTMONITOR

COMPRESSOR1

COMPRESSOR1


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POWERTHETHERMOSTAT

You can choose from three methods to power the thermostatBatteries only (AA alkaline). 24 Vac common wire only. 24 Vac common wire with battery backup (AA alkaline).

Wiring 24VacCommon Single-Transformer System Connect the common side of the transformer to the C screw

terminal of the thermostat wallplate. Leave the metal jumper wire in place between Rc andR.

Two-Transformer System Connect the common side of the cooling transformer to the Cscrew terminal of the thermostat wallplate. Remove the metal jumper wire between Rc andR.

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InstallingBatteries1.Install Two AA alkaline batteries on the

back of the thermostat as marked on thethermostat. See Fig. 22.

Fig. 22. Installing batteries.

2.Locate and remove the tab labeled. See

Fig. 23.

Fig. 23. Remove tab labeled, Remove,on thermostat back.

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BATTERIES(2)

REMOVE

TAB


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Mount Thermostat to Wallplate

1.Align the terminal screw blocks with the pins on the back of the thermostat. Push thethermostat straight onto the wallplate until it snaps into place. See Fig 24.

Fig. 24. Mount thermostat to wallplate.

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WALLPLATE

TERMINALSCREWBLOCK

PINSONBACKOF

THERMOSAT


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Fig. 25. Typical locations for ORS-1 Outdoor Sensor.

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CAUTIONElectrical Interference (Noise) Hazard.Can cause erratic system operation.Keep wiring at least one foot away from large inductive loads such as motors, linestarters, lighting ballasts and large power distribution panels.Use shielded cable to reduce interference when rerouting is not possible.

IMPORTANTErratic temperature readings from a sensor can occur as a result of any of thewiring practices described below. Avoid these practices to assure correctoperation. Use shielded cable to reduce interference if rerouting sensor wiring isnot possible.

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Be sure wires have a cable separate from the thermostat cable.Do not route temperature sensor wiring with building power wiring, next to controlcontactors or near light dimming circuits, electric motors or welding equipment.

Avoid poor wiring connections.Avoid intermittent or missing building earth ground.

CAUTIONElectrical Shock Hazard.

Can cause electrical shock or equipment damage.Disconnect ower su l before connectin wirin .

Wiring must comply with applicable codes, ordinances and regulations:1.Wire Outdoor Sensor to S1and S2 terminals on the thermostat. If leadwire provided is notlong enough), you need an extra cable to reach the hole at location.a. Using color-coded, 18-gauge thermostat wire is recommended. For example of generalwiring of sensor, see Fig. 26.b. Pigtail wiring can be used.

2.Mount Sensor in its mounting clip.3.Plug wiring hole using nonhardening caulk or putty.

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1.USE APPROPRIATE MOUNTING MEANS FOR THE TYPE OF STRUCTURE.2.PLUG WIRING HOLE WITH NON-HARDENING CAULK OR PUTTY .

Fig. 26. Wire Outdoor Sensor to the thermostat.

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12

WIRINGHOLE

THROUGH

STRUCTUREORS-01


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LocateandMount RemoteIndoor TemperatureSensor (Optional)1.Choose a location (see Fig. 27) for mounting the sensor on an inside wall about 19.4 ft

(1.5m) above the floor.2.Be sure wire distance between sensor and thermostat is less than 65.61 ft6m.3.Make sure there is good air circulation at average temperature at the chosen location.

Avoid the following locations because they can introduce errors in sensormeasurements. See Fig. 27.Hot areas caused by:(a) Concealed pipes or ducts.

(b) Drafts from fireplaces or other heat sources.(c) Convection or radiant heat from the sun or electrical equipment.Cold areas caused by:(a) Concealed pipes or ducts.(b) Drafts from windows and doors.Unheated areas on the other side of the wall location.Dead air areas:(a) Behind doors, furniture and curtains. (b) In corners and alcoves.4.Mark the area on the wall selected for mounting the Sensor or junction box.5.Run wire cable to a hole at the selected wall location. Pull approximately three inches ofwire through the opening. Color-coded, 18-gauge thermostat wire is recommended.

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44

Fig. 27. Typical location for Indoor Sensor.

5FEET

1.5METERS


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WireIndoor Sensor

CAUTIONElectrical Interference (Noise) Hazard. Can cause erratic system operation.Keep wiring at least one foot away from large inductive loads such as motors, linestarters, lighting ballastsand large power distribution panels.

IMPORTANTErratic temperature readings from a sensor can occur as a result of any of thewiring practices described below. Avoid these practices to assure correctoperation.Be sure wires have a cable separate from the thermostat cable.Do not route temperature sensor wiring with building power wiring, next tocontrol contactors or near light dimming circuits, electric motors or weldingequipment.

Avoid poor wiring connections.Avoid intermittent or missing building earth ground.

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CAUTIONElectrical Shock Hazard.Can cause electrical shock or equipment damage.Disconnect ower su l before connectin wirin .

Wiring must comply with applicable codes, ordinances and regulations.1.Wire Indoor Sensor to S1 and S2 terminals on the thermostat. For an example of generalwiring of IRS-1, see Fig. 28 to wire one sensor and 29 to wire multiple sensors.2.Push excess wire back into the hole. Plug the holeusing nonhardening caulk, putty or insulation to prevent drafts from affecting performance.

3.Remove IRS-1 sensor cover.4.Mount IRS-1 to the wall or junction box using the screws and anchors provided.5.Level the IRS-1 for appearance only. Device functions correctly even when not level.6.Install IRS-1 cover.

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1. POWER SUPPLY. PROVIDE DISCONNECT MEANS ANDOVERLOAD PROTECTION AS REQUIRED.

2. IF MORE THAN ONE REMOTE SENSOR IS REQUIRED, REFER TO

FIGURE 3

3.. WIRES MUST HAVE A CABLE SEPARATE FROM THE THERMOSTA

CABLE.

Fig. 28. Wiring a single Indoor Sensor. 47Fig. 29. Wiring Multiple Sensors.

1SENSORS MUST BE ARRANGED IN THIS CONFIGURATION TO OPERATE

CORRECTLY.

2WIRES MUST HAVE A CABLE SEPARATE FROM THERMOSTAT CABLE

RC 1

2

C7189

3


S1 S2 C R RC

C7189 C7189

C7189 C7189

1

2

S1 S2 C R RC

C7189 C7189 C7189

C7189 C7189 C7189

C7189 C7189 C7189

1

2


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INSTALLERSETUPFollow these steps to enter the InstallerSetup:1.Press and release the System Key.

2.Press and hold the two blank keys on

either side of the center blank key forapproximately five seconds until screenchanges.

48

AUTO

AMRoom SCHED

HOLD

CLOCK

SCREEN

MORE

SYSTEM

AUTO

FAN

Set To

TUE

Running As SCHED

DONEDONE

RoomSYSTEM

HEAT

OFFCOOL

TUE

CANCEL

Set To

AM


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3.Release the two blank keys when thescreen on the thermostat matches the

screen below.

4.See screen below to review how thethermostat keys are used during Installer

Setup. See Tables 3-5 for the InstallerSetu Numbers and Settin s.

5.Press the Done key to exit the Installer Setup screen.

49

DONE

DONE

INSTALLER

SETUP

NUMBER

ADVA NCE TO N EXT

INSTALLER SETUP

CURRENT

SETTING

CHANGE THE

CURRENT SETTING

PRESS TO EXIT

INSTALLER SETUP


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Installer SetupNumber

Installer SetupName Settings Notes

0120 Date(Year Upper)

Select first two digits of current calendar year(2005, etc)

it cannt be changed

0130Date

(Year Lower)Select last two digits of current calendar year(05 for year 2005, etc)

2001 - 2099 available

0140 Date (Month)Select number that represents currentcalendar month

0150 Date (Day)Select number that represents currentcalendar date

0160 Schedule Options0-nonprogrammable4-7-day programmable

when it is changed, the schedneed to be reprogrammed)

0170 System Type Selection

1-1 heat/1 cool conventional (factory setting)2-single-stage heat pump (no auxiliary heat)3-heat only conventional (no fan) Also for750mV.4-heat only conventional (with fan)5-heat only (power to open and power toclose zone valves or normally-open zonevalves)6-cool only conventional7-2 heat/1 cool heat pump (with auxiliaryheat)

8-2 heat/2 cool multistage conventional9-2 heat/1 cool multistage conventional10-1 heat/2 cool multistage conventional11-2 heat/2cool heat pump (no auxiliary heat)12-3 heat/2cool heat pump (with auxiliaryheat)

Available options and defaultsvary by thermostat. Systemselection automaticallymodifies some default settingsand/or hides other InstallerSetup options.

Table 3.installer Setup Menu.

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InstallerSetup

Number

Installer SetupName

Settings Notes

0180 Fan Control in Heating

0-gas or oil furnace equipment controls fan in

heating (factory setting)

1-electric furnace thermostat controls fan in

heating

Only shown if conventional

system is selected. If heat

pump is chosen, fan defaults

to electric.

0190

Changeover Valve O/B

Terminal Energized in

Heating or Cooling

(Heat Pumps Only)

0-changeover valve O/B terminal setting

1-changeover valve O/B terminal is

energized in heating

Only shown if heat pump

system is chosen.

0200Backup Heat Source

(Auxiliary Heat)

0-heat pump backup heat source is electric(factory setting)

1-heat pump backup heat source is fossil fuel

Only shown if 2 heat/1 cool or3 heat/2 cool heat pump is

chosen

0210External Fuel

FossilFuel Kit

0-no external fossil fuel kit is controlling heat

pump backup heat. This thermostat controls

the dual fuel. Must install outdoor sensor and

set Installer Setup Number 0340 to number

2. 1-external fossil fuel kit is controlling heat

pump backup heat

Only shown if fossil fuel is

chosen as backup heat

source.

0220Cycles per hour (cph)

for 1st Stage

Compressor

3-cph recommended for compressors(factory setting)

1, 2, 4, 5, 6-other cycle rate settings

0230

Cycles per hour (cph)

for 2nd Stage

Compressor

3-cph recommended for compressors

(factory setting)

1, 2, 4, 5, 6other cycle rate settings

Only shown if two stages of

cool are selected.

Table 3.installer Setup Menu.(CONTINUES)

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Table 3.installer Setup Menu. (CONTINUES)


Installer SetupName Settings Notes


for 1st StageConventional Heat

1- 1 cph used for steam and gravity3-3 cph used for hot water system and highefficiency (90% or better) furnaces5-5 cph used for standard fossil fuel forcedair (less than80% efficient) systems (factory setting)9-9 cph used for electric furnaces2, 4, 6, 7, 8, 10, 11, 12other cycle ratesettings

Not shown if system selectionis heat pump. Selection in thisstage changes default cph for2nd stage heat.

0250

Cycles per hour (cph)for 2nd Stage Heat

(Aux Heat for 2H/1CHeat Pumps)

1-1 cph used for steam and gravity

3-3 cph for hot water systems and highefficiency (90% or better) furnaces5-5 cph for standard fossil fuel forced air(less than 90% efficient) systems (factorysetting)9-9 cph used for electric furnaces or electricauxiliary heat for heat pump systems2, 4, 6, 7, 8, 10, 11, 12other cycle ratesettings

Only shown if two stages ofheat are selected.


for 3rd Stage Heat AuxHeat for 3H/2C Heat

Pumps)

1-1 cph used for steam and gravity3-3 cph for hot water systems and highefficiency (90% or better) furnaces

5-5 cph for standard fossil fuel forced air(less than 90% efficient) systems (factorysetting)9-9 cph used for electric furnaces or electricauxiliary heat for heat pump systems2, 4, 6, 7, 8, 10, 11, 12-other cycle ratesettings

Only shown if 3H/2C heatpump is selected.

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Installer Setup

Number

Installer Setup

NameSettings Notes


for Emer

3-3 cph for hot water systems and highefficiency (90% or better) furnaces

5-5 cph for standard fossil fuel forced air

(less than 90% efficient or better) systems

9-9 cph for electric strip heat for heat pumps

Only shown if 2H/1C or 3H/2C

heat pump is selected.

0280 Continuous Backlight0-Backlight function disable

1-Backlight function enable.

0300 Changeover0-manual changeover (factory setting)

1-auto changeover

0310 Deadband

Heating and cooling setpoints can be set no

closer than chosen value:

2-2F (1.5C)

3-3F (2C)

4-4F (2.5C)

5-5F (3C)

6-6F (3.5C)

7-7F (4C)

8-8F (4.5C)

9-9F (5C)

Shown only if automatic

changeover is selected.

0320Temperature Indication

Scale

0-fahrenheit temperature display (factory

setting)

1-celsius temperature display

when it is changed, the schedneed to be reprogrammed)

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Installer Setup

Number

Installer Setup

NameSettings Notes

0330 Daylight Savings1-daylight savings is on (factory setting).

0-daylight savings is off.

Set to 0 in areas that do not

follow daylight savings.

0340

Remote Temperature

Sensor (Outdoor or

Indoor)

0-no remote temperature sensor

1-outdoor temperature sensor for display

only.

2-outdoor temperature sensor for

control.Outdoor sensor used for Heat Pump

Lockout settings. (See Heat PumpTemperature Lockout section for more

details.)

3-indoor temperature sensor

Defaults and Options depend

on System Type selection.

Indoor Temperature Sensor

uses an averaging network

and does not include on-boardsensor.

0350

Heat Pump

Compressor Lockout

or (Balance Point)

0-no compressor lockout.

15F (-9.5C)

20F (-6.5C)

25F (-4C)

30F (-1C)

35F (1.5C)

40F (4.5C)

45F (7C)

Default depends on other

selections. Shown if control is

selected. (See section formore information.)

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Installer Setup

Number

Installer Setup

NameSettings Notes

0360Heat Pump Auxiliary

Lockout

0-no auxiliary heat lockout.

40F (4.5C)

45F (7C)

50F (10C)

55F (13C)

60F (15.5C)

Shown if electric is chosen for

backup heat source and

outdoor temperature sensor

for control is selected. (See

Advanced Features section for

more information.)

0380

Indoor

Dehumidification

Control

0-No indoor dehumidification control.

1-Dehumidification control activated.

Available on select odels. If

dehumidification control isactivated and auto-

changeover is selected in

Installer Setup Number 0300,

the deadband minimum is

defaulted to 5F (3C) in

Number 0310.

0500Furnace Change

Reminder

0-furnace filter reminder off

1-10 run time days

2-30 run time days3-60 run time days

4-90 run time days

5-120 run time days

6-365 run time days

Run time based on call for fan.

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Installer Setup

Number

Installer Setup

Name

Settings Notes

0510Humidifier PadReplacement

Reminder

0-humidifier pad replacement reminder off

1-90 calendar days

2-180 calendar days

3-365 calendar days

0520UV Lamp Replacement

Reminder0-UV lamp replacement reminder off

1-365 calendar days

0530Adaptive Intelligent

Recovery

1-Adaptive Intelligent Recovery control isactivated (system starts early so setpoint isreached by start of program period).

0-Conventional Recovery (system startsrecovery at programmed time)

0540 Number of Periods2-two periods available (Wake and Sleep)4-four periods available (Wake, Leave,Return and Sleep)

Not shown if non-programmable isselected. 2 or4 applies to all days of theweek. (when it is changed, thesched need to bereprogrammed)

0580Minimum Compressor

Off Time

5-five-minute compressor off-time setting(factory setting)

0, 2, 3, 4-other compressor off-time settings

0600Heat TemperatureRange Stop

40-90-temperature range (1F increments) ofheating setpoint.

Shown in 1/2 C.

0610Cool TemperatureRange Stop

50-99-temperature range (1F increments) ofcooling setpoint.

Shown in 1/2 C.

0640 Clock Format12-12 hour clock (factory setting)

24-24 hour clock


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Installer Setup

Number

Installer Setup

Name

Settings Notes

0650Extended Fan OnTime

Heat

0-no extended fan operation after call forheat ends

90- fan operation is extended 90 secondsafter call for heat ends.

Not shown if fan operation isset to fossil fuel or in Cool OnlySystems

0660Extended Fan On Time

Cool

0.no extended fan operation after call for coolends

90.fan operation is extended 90 secondsafter call for cool ends.

Not shown in Heat Only

Systems.

0670 Keypad Lockout

0-unlocked keypad

1-partially locked keypad

2-fully locked keypad

Unlockedall functions are

available.Partially locked onlytemperature up and downkeys and ability to enter andmodify Installer Setup modeare available.

Fully locked only ability toenter and modifyInstallerSetup mode are available.

0680Temperature Control in

Heat

1-less aggressive temperature control (couldcause temperature undershoot)

2-Standard temperature control in heating(factory setting)

3-more aggressive temperature control(could cause temperature overshoot)

Applies to recovery ramp anduse of auxiliary heat during

recovery.Choose 1 if gettingtemperature overshoot.

Choose 3 if gettingtemperature undershoot.

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Installer Setup

Number

Installer Setup

Name

Settings Notes

0690

Temperature Control in

Cool

1-less aggressive temperature control (couldcause temperature undershoot)

2-Standard temperature control in cooling(factory setting)

3-more aggressive temperature control(could cause temperature overshoot)

Applies to recovery ramp.

Choose 1 if gettingtemperature overshoot.

Choose 3 if gettingtemperature undershoot.

0700 Temperature DisplayOffset

-3F (-1.5C)

-2F (-1C)

-1F (-.5C)

0F (0. C) (no difference in displayedtemperature and actual room temperature )

1F (.5C)

2F (1C

3F (1.5C)

0710 Reset Thermostat0-no thermostat reset.

1-resets all Installer Setup Options to defaultvalues and resets schedule to default setting.

Only calendar settings andtime are retained.


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INSTALLERSYSTEMTESTUse the Installer System Test to test the W1 W2 E AUX Y1 Y2 and L .

CAUTIONEquipment Damage Hazard.Minimum compressor off time is bypassed during Installer System Test

Avoid cycling compressor quickly.

59

Howto Usethe InstallerSystemTestThe Installer Test is part of the Installer Setup Menu.

1.Enter the Installer System Test by entering the Installer Setup.2.Note that the test appears at the end of the Installer Setup Numbers.3.See Fig. 30 to review how the thermostat buttons are used during the Installer System Test.See Table 6 for available Installer System Tests.


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60

Fig. 30. Review thermostat buttons used during Installer System Test.

DONE

SYSTEM TESTNUMBER

SYSTEM STAUSNUMBER

UP ARROW KEY

ADVANCES TO

NEXT SYSTEMTEST NUMBER

UP ARROW

TURNS THE

SYSTER ON

DONE KEY

EXITS INSTALLE

SYSTEM TEST

ARROW ARROW

TURNS THE

SYSTER OFF


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InstallerSystemTestsTable 4. Installer System Test.

System Test Number Test Type System Status Number andDescription

Test 1 Cooling System Test1-Cool stage 1 and stage 2 turn on.

0-Cool is off.

Test 2 Fan System Test 1-Fan turns on.

0-Fan turns off.

Test 3 Heating System Test

1-Heat stage 1 and stage 2 (aux

heat) turn on.

0-Heat is off.

Test 4 Emergency Heat Test1-Emergency heat and L turn on.

0-Emergency heat and L turns off.

Press the Next button to go to the beginning o f the Installer Setup or p ress the Done button to exit the Installer

System Test.

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OPERATION

ThermostatKeys Thermostat Display

62

AUTO

AMRoom SCHED

HOLD

CLOCK

SCREEN

MORE

SYSTEM

FAN

Set To

TUE

HEAT

FAN

SELECTS

ON/AUTO/CIRC

SYSTEM

SELECTS EM.

HEAT/OFF/COOL

AUTO/EMER

UP ARROW

RAISES

TEMPERATURESETTING

DOWN ARROE

LOWERS

TEMPERATURESETTING

SCHED

ENTERS

SCHEDULING

MODE

HOLD

SETS A PERMANENT

HOLD AND ACTIVITIES

VACATION HOLD

CLOCK

SETS THE TIME

FORWARD

OR BACK

SCREEN

LOCKS OUT THE

SCREEN TO ALLOWFOR CLEANING

Running As SCHED

MORE

SHOWS ADDITIONAL

ACCESSORY ANDMAINTENANCE

OPTIONS

AUTO

AMRoomSCHED

HOLD

CLOCK

SCREEN

MORE

SYSTEM

FAN

Set To

TUE

HEAT

FAN

SHOWS FAN

SETTING

SYSTEM

SHOWS

CURRENT

SYSTEM

POSITION

TUE

SHOWS

CURRENT

DAY OF THE

WEEK

INSIDE TEMPERATURE

SHOWS THE CURRENT

INSIDE TEMPERATURE

TIME

DISPLAY CURRENT

TIME OF DAY. HOLD

TIME REMAINING OR

NUMBER OF VACATION

DAYS REMAINING

SET TO

TEMPERATURE

SHOWS THE

CURRENT SET

TEMPERATURE

Running As SCHEDRunning As SCHED

RUNNING AS SCHED

SHOWS THE

THERMOSTAT IS

FOLLOWING THE

PROGRAMMED

SCHEDULE


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SystemandFanSettingsSystem

The System key selections vary based on your heating and/or cooling system type.Heat Thermostat controls the heating system.Off Both heating and cooling systems are off.Cool Thermostat controls the cooling system.

Auto Thermostat automatically changes between heating and cooling operation,depending on indoor temperature.Emer Emergency heat cycles to maintain temperature. Compressor is locked out (usedonly for 2H/1C or 3H/2C heat pump systems) and auxiliary heat turns on as second stage ifneeded.

FanThe Fan key selections vary based on the heating and/or cooling system type.On Fan runs continuously. Use this setting for improved air circulation or for more efficientcentral air cleaning.

Auto Fan follows the fan program schedule.

Circ Fan runs randomly approximately 35% of the time when the equipment norequirement. Use this setting for improved air circulation or for more efficient central aircleaning when you do not want the fan running continuously.

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UserSetupFollow these steps to enter the User

Setup:1Press and release the System key.

2Press and hold the center blank key for

approximately five seconds until the screenchanges.

64

AUTO

AMRoom SCHED

HOLD

CLOCK

SCREEN

MORE

SYSTEM

FAN

Set To

TUE

Running As SCHED

HEAT

DONE

RoomSYSTEMHEAT

OFF

COOL

TUE

CANCEL

Set To

AM


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3Release the center blank key when thescreen on the thermostat matches the

screen below.

4See the screen below to review how thethermostat keys are used during the User

Setup. See Table 5 for the User Setupnumbers and settings.

5Press the Done key to exit the User Setup screen.

65

DONEDONE

INSTALLER

SETUP

NUMBER

ADVANCE TO NEXT

INSTALLER SETUPCURRENT

SETTING

CHANGE THE

CURRENT SETTING

PRESS TO EXIT

INSTALLER SETUP


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Installer Setup

Number

Installer Setup

Name

Settings

0120Date

(Year Upper)it cannt be changed

0130Date

(Year Lower)Select last two digits of current calendar year (05 for year 2005, etc)

0140 Date (Month) Select number of current calendar month (1-12)0150 Date (Day) Select number of current calendar date (1-31)

0160 Schedule Options0-Non-programmable4-7-day programmable(factory setting)(when it is changed, the sched need tobe reprogrammed)

0320Display temperature in

F or C0-F setting (factory setting)1-C setting

0330 Daylight savings time1-Daylight function enable0-Daylight function disable

0500 Furnace air filter

0-off (factory setting)1-10 fan run time days(about one month)2-30 fan run time days(about three months)3-60 fan run time days(about six months)4-90 fan run time days(about nine months)5-120 fan run time days(about one year)6-365 fan run time days(about three years)

0510Humidifier pad

reminder

0-off1-3 months2-6 months3-12 months

0520 UV lamp reminder0-off (factory setting)1-1 year

Table 5. User Setup Settings.

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Table 5. User Setup Settings. (CONTINUES)


Installer SetupName Settings

0540Number of schedule

periods available2-two (Wake and Sleep)4-four (Wake, Leave, Return, Sleep)factory setting

0640 Clock format12-12-hour clock(factory setting)24-24-hour clock

0670 Screen lockout

0-all keys available; screen is unlocked (factory setting)1screen is partially locked. All key functions locked except Temperature Upand Down keys and Cancel key.2-screen is fully locked

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PROGRAMMING

PreprogrammedEnergy Star SettingsTable 6 shows default program settings. Visit the Energy Star web site atwww.energystar.gov for additional education and resources on programmable thermostats.

Table 6. Energy Star Default Program Settings.

Setpoints

Schedule Period Time

Heat Cool

Fan Setting

Wake 6:00AM 68F (20C) 78F (26C) Auto

Day 8:00AM 60F (16C) 85F (29C) Auto

Evening 4:00PM 68F (20C) 78F (26C) Auto

Sleep 10:00PM 60F (16C) 82F (28C) Auto

Program HeatingandCooling ScheduleYour thermostat can control up to four different schedule periods per day:Wake-Period when you awaken and want your home at a comfortable temperature.Day

-

Period when you are away from home and want an energy-saving temperature.Evening-Period when you return home and want your home back to a comfortabletemperature.Sleep-Period when you are asleep and want an energy-saving temperature.NOTE: Schedule times are in 15-minute

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Edit Schedule1.Press Sched key. 2.Press PROG DAY key to review the

programs to see that the settings arecompatible with your lifestyle.

69

CANCEL DONE

AUTO

CANCELPERIOD

AM

COOL

EDIT

WAKE

DAY

EVENING

SLEEP

FAN

DAYPROGMON TUEWED THU FRI

HEAT

CANCEL DONE

AUTO

CANCELPERIOD

AM

COOL

EDIT

WAKE

DAY

EVENING

SLEEP

FAN


HEAT


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3.Press the edit then you press PROG DAYkey to select the program days

NOTE:The Fan setting can be programmefor On, Auto, or Circ for each periodselected. See Fan Schedule sectionfor more information.

6.Another approach to programming is tofirst program all weekdays Mon through Firand Sat and Sun as same programs.

4.Press Wake key. Once pressed, Wakeflashes to show it is selected. Same as theother sched5.Press Up and Down keys to modify timeand heat and cool temperatures from thisscreen.

70

CANCEL DONE

WAKE

DAY

EVENING

SLEEP


CANCEL DONE

AUTO

CANCELPERIOD

AM

COOL

EDIT

WAKE

DAY

EVENING

SLEEP

FAN


HEAT


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.

7. To exit schedule without saving changes,press Cancel key any time.

CancelaSchedulePeriod1.Press Sched key.

2.Press Edit key.3.Select the Day(s) of the week desired.4.Press schedule period you want to cancel(Wake, Leave, Return or Sleep). Onceselected, the period flashes.5.Press Cancel Period key.

NOTE: To set a Program Schedule for theremaining days of the week, repeatsteps 1-9. Example: If Mon Fri waselected first, go back and repeatsteps 1-6 for Sat and Sun.

6.The time, temperature(s) and fan settingdisappear. The bar above the selected periodis removed, indicating the scheduled period

was cancelled.NOTE: To reinstate a schedule period, pressarrow keys to set desired time andtemperatures.

71

CANCEL DONE

AUTO

CANCEL

PERIOD

AM

COOL

WAKE

DAY

EVENING

SLEEP

FAN


HEAT


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7. Press Done key.

OnFan runs continuously (programmablefor all schedule periods).

Circ

Fan runs randomly for approximately35% of schedule period when norequirement from equipments(programmable for all schedule periods).

Fan SchedulePress Fan key while in the Scheduling

Screen to program the System Fan. Choicavailable from the Scheduling Screen:

Auto (default position)Fan runs withequipment. Programmable for all scheduleperiods (Wake, Leave, Return and Sleep).

72

CANCEL DONE

AUTO

CANCELPERIOD

WAKE

DAY

EVENING

SLEEP

FAN


COOLHEAT

CANCEL DONE

AUTO

CANCELPERIOD

AM

COOL

WAKE

DAY

EVENING

SLEEP

FAN


HEAT


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anua verr e o an c e u eUse Fan key to change fan work statesby manual.

Auto-fan is automatically following the Fanschedule(choices are Auto, On or Circulate).On-Fan runs randomly for approximately35% of schedule period when norequirement from equipments.Circ-Fan circulates randomly forapproximately 35% of time.

When the program reaches to nextschedule, the fan will run as the setting inthe period.

Operate CDT900 SeriesTouchscreen

Set Time1.Press Clock.2.Use arrows to set current

73

CANCEL DONE

AM


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4. Press Done key.

IMPORTANTThe current day of the week shouldalready be set correctly. If not, seeInstaller Setup to set the day.

Set TemperatureOverridesThe thermostat has three temperature

override options: Override TemperatureUntil, Permanent Override and VacationHold.

Override Until (TEMPORARY Override)

Holds temperature temporarily until the nextscheduled period time or until the time theuser sets.

1. Press Up or Down arrow next to thetemperature you want to adjust. HoldTemperature Until time appears on thescreen. The Hold Temperature Until timedefaults to the start time of the nextscheduled period.

2. Press Up or Down arrow next to the Timekey to set desired time for the thermostat toresume

3. Press the Cancel or Sched key to cancelOverrideTemperature Untiland resumeschedule.

74

CANCEL

AUTO

PM

Override Until

Room

SCHED

HOLD

CLOCK

SCREEN

SYSTEM

HEAT

FAN

Set To

TUE


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75


VACATION HOLD

Changes temperature setting for a designated number of days.

1

Press the Up and Down arrow keys to set the desired temperature while away on vacation.Notice that Hold Temperature Until time is shown on the screen. (This is the time the Vacation

Hold override expires after the number of days ends.)

2Press Hold key twice. Screen shows Hold Temperature Until one day.3Press Up and Down arrow keys to change the number of Days you desire thermostatto override the schedule.NOTE: Days Up and Down arrows appear for approximately seven seconds. Pressing

ust below Hold Temperature Until on the screen allows the Days Up and Down arrowsto reappear.

4. To cancel the Vacation Hold overrideearly, press the Cancel key.NOTE:When the number of days of

Vacation Hold expires, the screenshows Following Schedule to

indicate that Vacation Hold hasended.

CANCEL

AUTO

Override UntilRoom SCHED

CLOCK

SCREEN

SYSTEM

HEAT

FAN

Set To

TUE

DAYS


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CleanThermostat Screen

The thermostat has a touch screen interaction. Follow these steps to clean the screenwithout making thermostat changes:1.Press the Screen key. Thermostat locks out all touch keys for 30 seconds to allow forcleaning.

76

CLEAN SCREEN


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2.Use damp cloth slightly moistened withwater or household glass cleaner to cleanthe screen.3.Repeat the above steps, as necessary.IMPORTANT

Do not spray any type of liquiddirectly on the thermostat itself. Ifusing household glass cleaner,spray cleaner on cloth. Then usea cloth to clean the thermostat

screen.4.Press the Done key to return to theHome Screen and normal operation.

ReplaceBatteries1.When the Battery indicator is flashing,

replace the batteries promptly with twofresh AA alkaline batteries

2.Remove thermostat from the wallplate bpulling straight out.

3.Remove the old batteries and insert twofresh AA alkaline batteries, as marked on thethermostat.

77


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4.Align the screw blocks with the pins on theback of the thermostat.

5.Push the thermostat straight onto the

wallplate until it snaps into place.

78

BATTERIES(2)

WALLPLATE

TERMINALSCREWBLOCK

PINSONBACKOF

THERMOSAT


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BatteryTips1.Replace the batteries as soon as Battflashes in the display. The Battery indicator

flashes in the display one month before thebatteries run down completely.2.Always use fresh AA alkaline batteries.Non-alkaline batteries do not last as longand can leak, causing thermostat damage.3.Although the thermostat has a LowBattery indicator, replace the batteriesonce a year to prevent the thermostat andheating/cooling system from shutting downdue to lack of battery power.

ScreenLocks

Partially Locked ScreenWhen partially locked, the screen indicatesScreen Locked for 5 to 7 seconds whenever the

user attempts to press a key that is locked.Pressing a locked key, while Screen Locked isshown, flashes ScreenLocked on thescreen.In this mode, all keys are locked except theTemperature Up and Down arrow keys:User can change temperature up or down

but cannot change schedule settings.Temporary temperature change lasts untilnext scheduled period and that time showson screen.To cancel temperature override and beginfollowing schedule, press Cancel key.To unlock screen, see Installer Setup section.

Fully Locked ScreenIn this mode, all keys are locked and notfunctional. To unlock screen, see InstallerSetup section. The screen continuouslydisplays Screen Locked.

79

AUTO

Room SCHED

HOLD

CLOCK

SCREEN

SYSTEM

HEAT

FAN

Set To

TUE SCREEN LOCKED

Running As SCHED

MORE


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Outdoor TemperatureIf an outdoor temperature sensor is installed,

the thermostat displays the outsidetemperature in the lower right corner of theHome Screen.

If thermostat is set to Auto ChangeoverSystem mode, press the More key until theoutside temperature is shown on the screen.

80

CANCEL DONE

Outside

AUTO

Room SCHED

HOLD

CLOCK

SCREEN

SYSTEM

HEAT

FAN

Set To

TUE

AM

Running As SCHED

MORE

AM

Outside


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RemoteIndoor TemperatureIf a remote indoor temperature sensor isinstalled, the thermostat displays the inside

temperature on the screen from the remotesensor(s).The thermostat internaltemperature sensor is not used.

ONE REMOTE INDOOR SENSOR INSTALLED(OPTIONAL)

If one remote indoor temperature sensor is

used, the screen showing the Insidetemperature reading shows the temperatureat the indoor remote sensor location. Thethermostat internal temperature sensor isnot used.

MULTIPLE REMOTE INDOOR SENSORSINSTALLED (OPTIONAL)

If more than one remote indoor sensor isused, the screen showing Inside temperaturreading shows the average of all the remoteindoor sensors. The thermostat internaltemperature sensor is not used.

81

AUTO

Room SCHED

HOLD

CLOCK

SCREEN

SYSTEM

HEAT

FAN

Set To

TUE

AM

Heat On

Running As SCHED

MORE

AM


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Indoor Air QualityRemindersFilter Change Reminder

The filter change reminder must be turnedon from the Installer Setup. Once expired,the screen flashes, ChangeFilterand a Reset key appears. Press theReset key to reset the change reminder.

NOTE: The days are counted as fan runtime, so anytime the fan is running, thereminder is counting that time against thenumber of days selected.

The remaining run time days can be viewedby pressing the More key; the remainingdays can be edited using the More key or

from the Installer Setup. To view or reset thereminder before it expires, follow thesesteps using the More key:

1.Press the More key until the filter reminderappears on the screen. This is the number offan run-time days remaining on the filterreminder.

82

DONE

MORE

DAYS

FILTER

EDIT

CANCEL

RESET

AUTO

Override Until

Room

SCHED

HOLD

CLOCK

SCREEN

SYSTEM

HEAT

FAN

Set To

TUERENEW FILTER

Running A s SCHED

MORE

PM

RESET


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2.Press the Edit key.3.Use the Up and Down keys to changethe number of run-time days.

4.Press the Done key to go back to the

viewing screen.

83

DONE

MORE

DAYS

FILTER

EDIT

CANCEL

RESET

CANCEL DONE

MORE

RESET

FILTER

EDITDAYS


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5.Press the Reset key to activate the newnumber of days selected in the previousscreen.

6.Press the Done key to return to the Home

Screen.

84

DONE

DAYS

FILTER

CANCEL


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Humidif ier Pad ReminderThe Humidifier Pad change reminder must bturned on from the Installer Setup. Onceexpired, the screen flashes,ChangeHumidifier Pad and a Reset key appears.Press the Reset key to reset the changereminder.The remaining calendar days can be viewedby pressing the More key. The remainingdays can be edited using the More key orfrom the Installer Setup. To view or reset thereminder before it expires, follow these steps

using the More key:1.Press the More key until the Humidifier Pachange reminder appears on the screen. Thiis the number of calendar days remaining onthe Humidifier Pad reminder.2.Press the Edit key.3.Use the Up and Down keys to change thenumber of calendar days.4.Press the Done key to go back to the

viewing screen.5.Press the Reset key to activate the newnumber of days selected in the previousscreen.6.Press the Done key to return to the HomeScreen.

UV Lamp ReminderThe UV Lamp change reminder must beturned on from the Installer Setup. Onceexpired, the screen flashes, Change UVLamp and a Reset key appears. Press theReset key to reset the change reminder.1.Press the More key until the UV Lampchange reminder appears on the screen. Thisis the number of calendar days remaining onthe UV Lamp reminder.2.Press the Edit key.

3.Use the Up and Down keys to change thenumber of calendar days.4.Press the Done key to go back to the viewingscreen.5.Press the Reset key to activate the newnumber of days selected in the previous screen6.Press the Done key to return to the Home

Screen.

85

CDT900 S i T h P bl Th


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TemperatureRecoveryThe thermostat feature, Adaptive Intelligent

Recovery, eliminates all guesswork whensetting the thermostat schedule.Simply set the program schedule to the timethat the comfort temperature is desired. Thethermostat then turns on the heating orcooling at just the right time to have the homereach the scheduled temperature at the

scheduled time.For example get up at 6:00 AM and want thetemperature to be 70F. Set the Wake periodfor 6:00 AM and 70F. The thermostat thenturns on the heat before 6:00 AM to raise thetemperature to 70F by 6:00 AM.The thermostat alerts that the heating orcooling system is coming on before a

scheduled time by showing Recovery on thescreen.

NOTE:It takes about a week for thethermostat to adjust to local weather, theschedule, the construction of the home and

the heating and/or cooling system. Each dayit adjusts the next days recovery start timeaccordingly.

86

Set To

MORE

SCREEN

RoomHEATPM

SYSTEM

TUE

CLOCK

HOLD

SCHED

FAN

AUTO

Recovery

CDT900 S i T h P bl Th t t


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MinimumOff-TimerThe Thermostat has built-in compressor

protection (minimum- off timer) that preventsthe compressor from restarting too early aftea shutdown.The minimum-off timer is activated after thecompressor turns off.If there is a call during the minimum-off timer,the thermostat shows Waitin the display.

When the minimum-off timer expires, CoolOn or Heat Ona appears solidly in the displayand the compressor and fan turn on.

aHeatPumpsonly.

87

SYSTEM

SCREENSet To

SCHED

HOLD

CLOCK

RoomPM

Running As SCHED

COOL

WED

WaitAUTO

FAN

MORE



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Inside Humidity LevelSelect models can sense the humidity level

in the home. The humidity level in the homeis shown in the lower right corner of theHome Screen.

If thermostat is set to Auto ChangeoverSystem mode, press the More key until thehumidity level is shown on the screen.

88

.

Set To

Room

COOL

SYSTEM

MORE

SCREEN

PM

TIME

HOLD

SCHED

THU

Humidity

FAN

AUTO

Running As SCHED

CANCEL DONE

Humidity



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Control Dehumidi fication Setting (SelectModels)

Select models read the inside humidity level anallow for a dehumidification setting:1.Press the More key until the inside humiditypercent and dehumidification setpoint areshown.

2.Use Up and Down arrow keys, located tothe right of the dehumidifier setpoint, to setdesired humidity level dehumidification inthe summer.3.Press Done key.

Dehumidification DroopControlThe dehumidification control attempts to

control to the user's humidity setpoint byturning on the air conditioner. In extremelyhigh humidity conditions, the thermostatkeeps the air conditioner running(energizing Y and G) for up to 3F belowthe temperature setpoint. It does this whiletrying to achieve the desired humiditysetpoint and balancing that with the

temperature setpoint. The thermostatcontrols up to 3 F below the temperaturesetting until either the humidity is satisfiedor conditions change.

89

CANCEL DONE

Humidity

DEHUMIDIFICATION



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SpecialHeatPumpOperationeat ump n cat on equ res

24Vac CommonConnection)E5 indication is located in the screen of thethermostat. It is only visible whenlighted.When the L terminal is wired to anequipment monitor,This is operational in theHeat, Off, Cool or Auto positions. See Fig.32.

HeatPumpEmergencyHeatLCDIndication(Requires 24Vac

CommonConnection)The thermostat uses E5 indicator that lightswhen the thermostat is in the Emergency Heatmode. The E5 is located in the LCD screenof the thermostat. It is visible only when on.When the thermostat is in the Emer systemmode, the L terminal is continuously energized

and the E5is show.

HeatPumpTemperatureLockoutsDual Fuel Heat Pump and Outdoor

Temperature SensorIn this operation, there is no external fossil fuel

kit (dual fuel kit) installed; the thermostat controlthis function.

90

AUTO

AM

SCHED

HOLD

CLOCK

SCREEN

MORE

SYSTEM

HEAT

FAN

Set To

MON



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Fig. 32. L terminal switch to R (power)side of system transformer.

1.Choose correct heat pump application inInstaller Setup Number 0170.2.Choose Fossil Fuel Option as thebackup heat source in Installer SetupNumber 0200.3.Choose No External Fossil Fuel Ki tOption is controlling back up heat inInstaller Setup Number 0210.4.Choose Outdoor Temperature Sensorfor Heat PumpTemperature Lockouts

Option in Installer Setup Num- ber 0340.5.Choose appropriate Balance PointTemperature in Installer Setup Number0350.OPERATION IN HEAT MODE ABOVE BALANCEPOINT (OUTDOOR TEMPERATURE)

When the outdoor temperature is abovethe selected Balance Point Temperature(ISU 0350), only the compressor operatesand the fan (G terminal) energizes whenthe thermostat calls for heat. See Fig. 33.

BALANCEPOINT

OUTDOOR

TEMPE

RATURE

COMPRESSOR ONLY

FOSSIL FUEL ONLY

Fig. 33. Dual Fuel Heat Pump Operation inHeat mode with

OPERATION IN HEAT MODE BELOW BALANCEPOINT (OUTDOOR TEMPERATURE)

When the outdoor temperature is below thselected Balance Point Temperature (ISU0350), only the Fossil Fuel (auxiliary heat)

operates and the fan (G terminal) does notenergize when the thermostat calls for hea

91



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OPERATION IN EMERGENCY HEAT MODE

The balance point (outside) temperature is

not used in the Emergency heat mode. Whthe thermostat is moved to the EmergencyHeat position, the compressor is locked out.The first stage of heat is whatever isconnected to the E terminal. The secondstage of heat is what is connected to the Auterminal. Often there is only one source of

non-compressor heat and the E terminal isjumped to the Aux. terminal.

Heat Pump with Electric Auxiliary

(Backup) Heat and OutdoorTemperature Sensor1.Choose correct heat pump application inInstaller Setup Number 0170.2.Choose Electric asAuxil iary (Backup)Heat Source in Installer Setup Number0200.

3.Choose Outdoor Temperature Sensorfor Control Option in Installer SetupNumber 0340.4.Choose Compressor LockoutTemperature inInstaller Setup Number0350.5.ChooseAuxi liary Lockout Temperaturein Installer Setup Number 0360.

NOTE: There is a 5F deadband between thCompressor and Auxiliary Heat Lockout

92



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Operation in Heat ModeWhen the outdoor temperature is below the

Compressor Lockout Temperature, only theAuxiliary Heat operates.When the outdoor temperature is above the

Auxiliary Lockout Temperature, only theCompressor operates. See Fig. 34.

AUXILIARY LOCKOUT

TEMPERATURE

COMPRESSOR

LOCKOUT

TEMPERATURE

OUTDOOR

TEMPERA

TURE

BOTH

OMPRESSORANDAUXILIARYHEAT

AUXILIARYONLY

COMPRESSOR

Fig. 34. Heat Pump Operation with LockoutTemperatures Set.

When the outdoor temperature is between thetwo temperatures, both the Compressor and

Auxiliary Heat operate.

Operation in Emergency Heat ModeOnce the thermostat is placed into the

Emergency Heat mode, the compressor andauxiliary lockout features are turned off. Inthe Emergency heat mode, the compressoris locked out. The first stage of heat iswhatever is connected to the E terminal.The second stage of heat is connected tothe Aux. terminal. Usually the emergencyand auxiliary heat sources are electric strip

heat in these cases.

Operating SequenceThe thermostat energizes specificterminal(s), depending on the demand forheating, cooling or fan. The thermostatscreen shows the time, inside temperature,system and fan selections. Additional

indicators are shown when the heating,cooling or fan is energized. See Tables 9 - 11for specification information.

93



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Table 9. Sequence of Operation for Conventional Systems.

System Setting Fan Setting Call for Action Energize Terminals Screen MessageOff Auto None None None

Cool Auto None None None

Cool or Auto Auto Stage 1 Cooling Y, G Cool On

Cool or Auto Auto Stage 1 and Stage 2

Cooling

Y, Y2b, G Cool On

Heat Auto None None None

Heat or Auto Auto Stage 1 Heating W, Ga Heat On

Heat or Auto Auto Stage 1 and Stage 2

Heating

W, W2c, Ga Heat On

aG energizes only if Installer Setup number 0180 is set to Electric.bIf Installer Setup System type is set to two stages of cooling.cIf Installer Setup System type is set to two stages of heating.

Table 10. Sequence of Operation for Power Open and Power Closed Valves or NormalOpen Valves.

System Setting Fan Setting Call for Action Energize Terminals Screen MessageOff Auto None None None

Heat N/A None Y None

Heat N/A Heat W Heat On

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Table 11. Sequence of Operation for Heat Pump Systems.

System Setting Fan Setting Call for Action Energize Terminals Screen Message

Off Auto None O/Ba NoneCool Auto None O/Ba None

Cool or Auto Auto Stage 1 Cooling Y, G, O/Ba

Cool On

Cool or Auto AutoStage 1 and Stage 2

CoolingY, Y2

d, G, O/B

a Cool On

Heat Auto None O/Ba

None

Heat or Auto Auto Stage 1 Heating Y, G, O/Ba

Heat On

Heat or Auto AutoStage 1 and Stage 2

Heating

Y, AUXc

, G, O/Ba

Aux Heat On

Heat or Auto AutoStage 1, 2 and 3

Heating

Y, Y2d, AUXe

, G,

O/Ba

Aux Heat On

Em. Heat Auto None Lb

, O/Ba

None

Em. Heat Auto Stage 1 Heating E, G, Lb, O/Ba

Heat On

Em. Heat AutoStage 1 and Stage 2

HeatingE, AUX, G, L

b, O/B

a Aux. Heat On

aConfigure O/B in Installer Setup. Based on last piece of equipment called (cooling = O or

heating = B).bRed LED is on. See LED Indication section for more details.cIf Installer Setup System Type is set to 2Heat/1Cool Heat Pump with Auxiliary Heat.dIf Installer Setup System Type is set to 3Heat/2Cool Heat Pump with Auxiliary Heat.eThis terminal does not energize if Installer Setup System type is set to 2 Heat/2 Cool HeatPump with no Auxiliary Heat 95

CDT900 Series Touchscreen Programmable ThermostatCDT900 Series Touchscreen Programmable Thermostat


97/102

CDT900 Series Touchscreen Programmable ThermostatCDT900 Series Touchscreen Programmable Thermostat

Outdoor TemperatureSensorOperation

When installed with Thermostat Installer SetupNumber 0340 set to 1 or 2, the outsidetemperature can be displayed on thethermostat. See Fig. 35.

Fig. 35. Outside temperature reading onCDT900 Series Thermostat.

The Outdoor Sensor converts outdoorambient temperature to a resistance thatthe thermostat can interpret.The sensor has a negative temperaturecoefficient (NTC), which means thatresistance decreases as the temperatureincreases.

CheckoutWith an accurate thermometer (1F[0.5C]) measure the temperature at thesensor location, allowing time for thethermometer to stabilize before reading.

CalibrationThe Outdoor Sensor is calibrated at thefactory and cannot be recalibrated in thefield.

96

TUE

SYSTEM

HEAT

SCREEN

MORE

Set To

SCHED

HOLD

CLOCK

Room

Running As SCHED

FAN

AUTO

AM

Outside



98/102


emote n oor emperatureSensorOperation

When installed with Thermostat InstallerSetup Number 0340 set to 3, the remoteinside temperature is displayed on theThermostat Home Screen as InsideTemperature. The thermostat internaltemperature sensor is not used. See Fig.36.

Fig. 36. Inside temperature reading onTCD900 Series Thermostat.

The Wall Mount Temperature Sensor convertsroom temperature to a resistance that thethermostat can interpret.The sensor has a negative temperaturecoefficient (NTC), which means that resistancedecreases as the temperature increases.

The sensor can be used to provide one remotesensor input (see Fig. 28) or as a temperatureaveraging network with multiple Sensorsconnected, as shown in Fig. 29.

CheckoutFor best results, allow Wall Mount TemperatureSensor to absorb the air moving through theroom for a minimum of twenty minutes beforetaking a resistance measurement.With an accurate thermometer (1F [0.5C])measure the temperature at the sensor location

allowing time for the thermometer to stabilizebefore reading.

CalibrationThe Wall Mount Temperature Sensor iscalibrated at the factory and cannot berecalibrated in the field. 97

AUTO

Room SCHED

HOLD

CLOCK

SCREEN

SYSTEM

HEAT

FAN

Set To

TUE

AM

Heat On

Running As SCHED

MORE

AM



99/102


TROUBLESHOOTING(TABLE14)Table 14. Troubleshooting.

Symptom Possible Cause Action

Display does not come on. Thermostat is not being powered.

Check for 24 Vac between C and Rc.

Check that AA batteries are installed

correctly and are good.

The upper or lower temperature limits

were reached.

Check temperature setpoints.

Check Installer Setup Numbers 0600 and

0610; modify as needed.Temperature settings do not change.

The keypad is fully locked.Check Installer Setup Number 0670 to

change keypad locked options.

Thermostat minimum off-time isactivated.

Wait up to five minutes for the system torespond.

System selection is not set to Heat or

Cool.Set system Selection to correct position.

Heating or cooling does not come on.

System type Selection is incorrect.

Check Installer Setup Number 0170 and

make sure correct System type is

chosen.

Thermostat is calling for Heat (Heat on)

or Cool (Cool on) but no heating orcooling is running.

Heating or cooling equipment is notoperating.

Check wiring.

Check Installer Setup Number 0170 and

make sure correct system type ischosen.

Verify operation of equipment in System

Test mode.

98



100/102


Table 14. Troubleshooting. (CONTINUES)Symptom Possible Cause Action

Heating equipment failure.

Check for 24 Vac at the equipment on

the secondary side of the transformerbetween power and common. If voltageis not present, check the heating

equipment to find the cause of theproblem.

Check for 24 Vac between the heatterminal (W) and transformer common. If

24 Vac is present, the thermostat isfunctional. Check the heating equipment

to find the cause of the problem.

Heat does not turn on (Heat On is solid in

the display).

Loose or broken wire connection

between thermostat and heating

equipment.

Check for 24 Vac between the heat

terminal (W) and transformer common. Ifvoltage is not present, check wire

connection (loose or broken) betweenthe thermostat and the heating

equipment.

Cooling does not turn on (Cool

On is solid in the display)

Cooling equipment failure.

Check for 24 Vac at the equipment onthe secondary side of the transformer

between power and common. If voltageis not present, check the cooling

equipment to find the cause of theproblem.

Check for 24 Vac between the coolterminal (Y) and transformer common. If

24 Vac is present, the thermostat isfunctional. Check the cooling equipment

to find the cause of the problem.

99



101/102


Table 14. Troubleshoot ing. (CONTINUES)Symptom Possible Cause Action

Cooling does not turn on (Cool

On is solid in the display).

Loose or broken wire connection

between thermostat and cooling

equipment.

Check for 24 Vac between the cool

terminal (Y) and transformer common. Ifvoltage is not present, check the wire

connection (loose or broken) between

the thermostat and the cooling

equipment.

Fan does not turn on in a call for heat

(electric furnace).

Fan Control in Heating is set to Gas or

Oil Furnace (Setting 0180).

Set Fan Control in Heating to Electric

Furnace(Setting 0180).

Heat pump puts out cool air in the heat

mode and warm air in the cool mode.

Changeover Valve (Installer Setup

Number 0190) is not configured to match

the changeover required by the installedheat pump.

Set Changeover Valve (Installer Setup

Number 0190) to match the changeover

required by the installed heat pump.

The heating equipment is not a heat

pump but the System Type (Installer

Setup Number 0170) is set to Heat

Pump.

Set System Type (Installer Setup

Number 0170) to match the installed

heating and/or cooling equipment.Both the heating and cooling equipment

are running at the same time.

Heating and cooling wires are shorted

together.

Separate the shorted heating and cooling

wires.

Heating equipment is running in the cool

mode.

Heating equipment is not a heat pump

but System Type (Installer Setup

Number 0170) is set to Heat Pump.



heating and/or cooling equipment.

Heating equipment does not turn off and

heat temperature setting is set below

room temperature (Heat On is not in the

display).

Heating equipment is not a heat pump

but System Type (Installer Setup

Number 0170) is set to Heat Pump.



heating and/or cooling equipment.

100



102/102


Table 14. Troubleshoot ing. (CONTINUES)Symptom Possible Cause Action

Cannot set the system setting to Heat.

System Type (Installer Setup Number

0170) is set to Cool Only.


Number 0170) to match the installedheating and/or cooling equipment.

Cannot set the system setting to Cool.

System Type (Installer Setup Number

0170) is set to Heat Only or Heat Only

with Fan.


N