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Comfort-Set®90 SeriesTMPREMIUM1F97-391Installation andOperating InstructionsRetain for Future UseThermostat/Humidifier ControlDigital 7 Day Programmab

8HM1 W RH RC G Y HM2 6WRH123HM1 HM26YGWRC RHEHJIMKLWIRING DIAWIRING DIAWIRING DIAWIRING DIAWIRING DIAGRAMSGRAMSGRAMSGRAMSGRAMSAll wiring diagrams are

9AHumidifier SystemBZone ValveCCooling SystemDFan RelayEHeating SystemHJumper WireITRANSFORMERJ24 VAC SideK120 VAC SideLHot SideMNeutral SideNHEATING

10HM1 W RH RC G Y HM2 6GY5324RHW1HM1 HM26YGWRC RHEDCHJIMKL1 From heating system2 From 24 VAC transformer3 Red jumper wire (provided)4 From fan rel

11HM1 W RH RC G Y HM2 6WRH12643HM1 HM2YGWRCRHHJIMKL661452B1 From heating system2 From 24 VAC transformer (through zone valve)3 Red jumper wir

12HM1 W RH RC G Y HM2 6WRH12RCGY534HM1 HM26YGWRC RHEDCJIMKLJOMKL1 From heating system2 From 24 VAC heating transformer3 From 24 VAC cooling transfo

13Installation/ConfigurationHM1 HM26YGWRCRHDCJIMKLHM1 W RH RC G Y HM2 61RCGY321 From 24 VAC cooling transformer2 From fan relay3 From cooling syste

14HM16 Y G WHM2RC RHHM1 W RH RC G Y HM2 6A1LMKJ1IHMNOTE: Two terminal choices (HM1 or HM2) are provided forhumidifier control. When the humidity setti

15HM1 6 Y G WHM2RC RHHM1 W RH RC G Y HM2 6A1LMKKJ1IRelay90-290Qor equivalentHMFigure 9 – Typical wiring diagram for 120V humidifier system1 From humi

16Before turning power on to the system,the jumpers on the back of thethermostat must be configured tooperate correctly with the systemequipment.This

171 32W922W9141Clip for remote sense23-pin connector3Clip for electric heatFigure 10 – Jumper locationsInstallation/Configuration

17164356217 89101112131415Easy, Menu-Driven Set-Upand ProgrammingPremium optionsto customize the thermostatto fit your application.

18Step Press Button(s) Displayed (Factory Default) Press or to select: COMMENTS1 EMR(ON)OFF2 SET CYCL HEAT(05)02 - 40Adju

198 0˚F(0)5 LO to5 HI9 (˚F) ˚C11 REMT SEN(OFF)ONSelects remote sensor OFF or ONSee page 2112PART LOCK(OFF)ONSelects partial keypad lockout OFF or ONSe

20This option allows the cycle times inheating and cooling to be increased ordecreased. The factory set values canbe adjusted higher for longer cycles

21compressor and the fan to come on atslightly different times, which allowsfull power to the compressor on startup.The fan off delay allows the fan t

22The remote sense feature will notwork if the system does not provide24V to the thermostat (example:heating-only system or 3-wire zonevalves).To use

23CHECK CHECK CHECK CHECK CHECK THERMOSTTHERMOSTTHERMOSTTHERMOSTTHERMOSTAAAAAT OPERAT OPERAT OPERAT OPERAT OPERATION (cont’TION (cont’TION (cont’TION

24PROGRAMMINGMANUMANUMANUMANUMANUAL OPERAAL OPERAAL OPERAAL OPERAAL OPERATIONTIONTIONTIONTION(Bypassing the Pr(Bypassing the Pr(Bypassing the Pr(Bypas

25Programming9. If you program Monday the firsttime you press PROGRAM VIEW itwill be copied to the rest of the week.To program the other days of the w

2662°F (16°C)62°F (16°C)62°F (16°C)62°F (16°C)62°F (16°C)62°F (16°C)62°F (16°C)5:00 PM5:00 PM5:00 PM5:00 PM5:00 PM5:00 PM5:00 PM 10:00 PM10:00 PM10:00

27Programming82°F (27°C)82°F (27°C)82°F (27°C)82°F (27°C)82°F (27°C)82°F (27°C)82°F (27°C)5:00 PM5:00 PM5:00 PM5:00 PM5:00 PM5:00 PM5:00 PM 10:00 PM10

1INTRODUCTIONThank you for purchasing yournew Comfort-Set 90 thermostatand humidifier control. White-Rodgers has been producingenergy saving controls

287 Day Personal HEATProgram Schedule1 Morning (MOR)2 Day (DAY)3 Evening (EVE)4 Night (NHT)5 Start Time6 TemperatureMONTUEWEDTHUFRISATSUN15 6 5

29Programming7 Day Personal COOLProgram ScheduleMONTUEWEDTHUFRISATSUN15 6 5 6 5 6 5 62 3 41 Morning (MOR)2 Day (DAY)3 Evening (EVE)4 Night (NHT)5

30FEATURESHumidistat Features:Adjustable Humidity Display ------ 36Humidifier MaintenanceIndicator --------------------------- 36Humidifier Control an

31PushbPushbPushbPushbPushbutton Bacutton Bacutton Bacutton Bacutton BacklightklightklightklightklightThe large numbers and letters on yourLCD screen

32SelectaSelectaSelectaSelectaSelectabbbbble Enerle Enerle Enerle Enerle EnergggggyyyyyManaManaManaManaManagggggement Rement Rement Rement Rement Reco

33FeaturesPrPrPrPrProoooogggggrrrrrammaammaammaammaammabbbbble Fle Fle Fle Fle Fan Contran Contran Contran Contran ControlololololThis feature allows

34display in low light conditions, andallow for armchair programming.CHECK BATTERY will be displayedwhen the batteries are low. To assureoptimum perfo

35FeaturesCompressorCompressorCompressorCompressorCompressorShorShorShorShorShort-Cyt-Cyt-Cyt-Cyt-Cycccccle Prle Prle Prle Prle Protection.otection.ot

36be set anywhere from 0 to 1975 hoursin 25 hour increments. A selection of00 will cancel this feature.When CHCK HUMD is displayed,you can clear it by

37Featureswith respect to the humidifier’scapability.PrPrPrPrProoooogggggrrrrrammaammaammaammaammabbbbble le le le le AAAAAutomautomautomautomautomati

2THE THE THE THE THE THERMOSTTHERMOSTTHERMOSTTHERMOSTTHERMOSTAAAAAT BT BT BT BT BUTTUTTUTTUTTUTTONSONSONSONSONSSee inside front cover for illustration

38FAQs 1F97-3911. My thermostat is readingin Celsius. How do I changeit to Fahrenheit?2. The display shows theword CHECK BCHECK BCHECK BCHECK BCHECK B

39FAQsFAQs 1F97-3915. My furnace (air condition-ing) cycles too fast (slow). Isthere an adjustment?6. Why does the blower fankeep running after the sy

40FAQs 1F97-3917. Do I have to program astop time for each programperiod?8. My display light does notwork. Can it be fixed orreplaced?9. Between Heati

41FAQs 1F97-39111. How can I get an extracopy of the OperatingManual for my thermostat?12. What do I do if mysystem is not workingproperly and I need

42TROUBLESHOOTINGSYMPTOM POSSIBLE CAUSE CORRECTIVE ACTIONNo Heat/No Cool/No Fan(common problems)No Heat1. Blown fuse or tripped circuitbreaker.2. Furn

43SYMPTOM POSSIBLE CAUSE CORRECTIVE ACTIONNo Heat (cont.)No Cool5. Heating system requiresservice or thermostat requiresreplacement.1. Thermostat not

44SYMPTOM POSSIBLE CAUSE CORRECTIVE ACTIONHeat, Cool or Fan RunsConstantlyThermostat Setting andThermostat ThermometerDisagreeThermostat Does Not Foll

45SYMPTOM POSSIBLE CAUSE CORRECTIVE ACTIONBlank Display and/or KeypadNot RespondingHow do I change the roomHumidity display?1. Voltage spike or static

PROGRAMMING ------------------ 24ScheduleSample Programs ----------------- 26Personal Programs---------------- 28SetClock ----------------------------

Index

3FAN AUTOHRSCHECK BATTERY FAMMONFAN AUTOHEATHEATHRSCHECK BATTERY FAMMON WED THU FRI SAT SUNTUEWED THU FRI SAT SUNTUE18 1819 20 2122252324Figure 1. The

NONONONONOTESTESTESTESTES

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PART NO. 37-6459A0339The Emerson logo is atrademark and service markof Emerson Electric Co.White-Rodgers is a divisionof Emerson Electric Co.Printed i

4INSTALLATION AND CONFIGURATIONThis White-Rodgers AutomaticSetback Digital Thermostat usesmicrocomputer technology to provideprecise time, temperature

5PRECAUTIONSPRECAUTIONSPRECAUTIONSPRECAUTIONSPRECAUTIONSWARNING!Do not shorDo not shorDo not shorDo not shorDo not short out tert out tert out tert ou

6INSTINSTINSTINSTINSTALLAALLAALLAALLAALLATION TION TION TION TION AND CONFIGURAAND CONFIGURAAND CONFIGURAAND CONFIGURAAND CONFIGURATIONTIONTIONTIONTIO

7HM1WRHRCGYHM26S1S2S312341Figure 2 – Thermostat base1Mounting screws2Pull wires through this opening3Insert wires into terminal holes, then tighten sc