8400 Series Thermostats

READ AND SAVE THESE INSTRUCTIONS

Owner’s Manual

Includes Operating Instructions and

Warranty Information

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Thermostat features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3How to identify your thermostat’s model number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3Controls & display overview •NonProgrammablemodels(8444,8446,8448) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 •Programmablemodels(8463,8465,8466) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

TAblE Of CONTENTS

AbOUT yOUR NEw THERmOSTAT

OpERATION & pROgRAmmINg

wARRANTy

Operation (all models) •Selectsystemmode(HEAT/COOL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 •Changetemperaturesetting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 •Selectfansetting(ON/AUTO/CIRC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 •Resetserviceremindermessages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 •BatteryinstallationandResetButton . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7programmable models only (8463, 8465, 8466) •Settimeandday . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8 •Understandingprogramschedules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8 •Progressiverecovery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9 •Changingprogramschedules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10 •Programscheduleoverrides(temporary,permanent) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Limitedwarranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12 Warrantyregistration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

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AbOUT yOUR NEw THERmOSTAT

THERmOSTAT fEATURES

model 8444Heat/CoolNon-Programmablemodel 8446HeatPumpNon-Programmablemodel 8448Heat/CoolorHeatPumpMulti-Stage

Non-Programmablemodel 8463Heat/CoolProgrammablemodel 8465HeatPumpProgrammablemodel 8466Heat/CoolorHeatPumpMulti-Stage

Programmable

All 8400 series thermostats•Large,clear,backlitdisplayiseasytoread–eveninthedark.

•Displaysroomtemperature,temperaturesetting,andoptionaloutdoortemperature.

•Frontbatterydooraccessforfast,easyreplacement.

•Builtincompressorprotection.

•Circulationfanmodeforaircleaning.

•Airfilter,humidifier,dehumidifier,andHVACserviceindicators.

•Autobacklight(activatedwithfirstbuttonpress).

programmable models only (8463, 8465, 8466)•Separatelyprogrammableweekday/weekendschedules.

•Easytousetemperaturecontrolcanoverrideprogramscheduleatanytime.

•Progressiverecovery.

HOw TO IDENTIfy yOUR THERmOSTAT’S mODEl NUmbER

MODELNUMBER

Tolocatethemodelnumber,removethebatterycover.

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CONTROlS & DISplAy OVERVIEw – mODElS 8444, 8446, 8448

NOTE:BACkLIgHTISACTIVATEDWITHFIRSTBUTTONPRESSANDAUTOMATICALLyTURNSOFF.

CURRENTINDOORTEMPERATURE

SySTEMMODESETTINg

FANSETTINg

SySTEMMODE(PAgE6)

FANSETTINg(PAgE7)

BATTERyDOOR

MESSAgECENTER LOWBATTERyWARNINg(PAgE7)

QUICkREFERENCECARD

OUTDOORTEMPERATURE(OPTIONAL)

TEMPERATURESETTINg

EQUIPMENTSTATUS

EMERgENCyHEAT(RED)

SySTEMFAULT(yELLOW)

INDICATORSHOWSTHROUgHHOUSINg

HEAT pUmp mODElS ONly

UP

DOWN

AbOUT yOUR NEw THERmOSTAT – NON-pROgRAmmAblE mODElS

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CONTROlS & DISplAy OVERVIEw – mODElS 8463, 8465, 8466

NOTE:BACkLIgHTISACTIVATEDWITHFIRSTBUTTONPRESSANDAUTOMATICALLyTURNSOFF.

CURRENTINDOORTEMPERATURE

SySTEMMODESETTINg

FANSETTINg

SySTEMMODE(PAgE6)

FANSETTINg(PAgE7)

BATTERyDOOR

MESSAgECENTER LOWBATTERyWARNINg(PAgE7)

QUICkREFERENCECARD

OUTDOORTEMPERATURE(OPTIONAL)

TEMPERATURESETTINg

EQUIPMENTSTATUS

EMERgENCyHEAT(RED)

SySTEMFAULT(yELLOW)

INDICATORSHOWSTHROUgHHOUSINg

HEAT pUmp mODElS ONly

UP

DOWN

PROgRAM

CURRENTSCHEDULEPERIOD (PAgE8)

HOLD

CURRENTTIME

AbOUT yOUR NEw THERmOSTAT – pROgRAmmAblE mODElS

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OpERATION – All mODElS

SElECT SySTEm mODE (Off/HEAT/Em-HEAT/COOl/AUTO)

press toselect:

AUTO:Thermostatautomaticallyselectsheatingorcoolingdependingontheindoortemperature.

Off:Heatingandcoolingsystemsareoff.

HEAT:Thermostatcontrolsonlytheheatingsystem.

COOl:Thermostatcontrolsonlythecoolingsystem.

Em-HEAT:Thermostatcontrolsemergency/auxiliaryheat.Heatpumpwillnotoperate.(Onlyforheatpumpswithauxiliaryheatonmodels8446,8465,8448HPand8466HP.)

Appliestoprogrammableversions(8463,8465,8466)wheninHOLDmode.

press or toadjustthecurrentsetting.

InAUTOuse toswitchbetweentheHEATandCOOLsetting.

CHANgE TEmpERATURE SETTINg

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SElECT fAN SETTINg (ON/AUTO/CIRC)

press toselect:

ON:Fanrunscontinuously.Usethismodeformaximumaircirculation/aircleaning.

AUTO:Fanrunsonlywhentheheatingorcoolingsystemison.

CIRC:SameasAUTO,butifthefanhasbeenofffor20minutesthefanwillbeactivatedfora10minutecycle.Usethismodeforabalanceofenergysavingsandaircirculation/cleaning.

OpERATION – All mODElS

bATTERy INSTAllATION AND RESET bUTTON

ThethermostatcaneitherbeACorbatterypowered,orboth.WhenwiredtobeACpowered,thebatteriesareoptionalandonlyprovidebackuppowertotheclock.

Thethermostathasamemorybackupthatsavesthethermostat’ssettingsincaseofapowerinterruption.

Theresetbuttonlocatedunderthebatterycovercanbeusedtoresetthethermostatbacktofactorydefaults.

RESET BUTTON

RESET SERVICE REmINDER mESSAgES

press and hold and togetherforthreesecondstoresetaserviceremindermessage.

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SET TImE AND DAy

2 . press or toadjustthehour.

3 . press ,theminutesflash.press ortoadjusttheminutes.

4. press ,thedayflashes.press ortoadjustday.

5. press toend.“DONE”willdisplay.

Thethermostatwillreturntonormalmodeifnokeyispressedwithin3seconds.

OpERATION & pROgRAmmINg – pROgRAmmAblE mODElS ONly (8463, 8465, 8466)

1 . press toentertimesettingmode.HourandAM/PMareflashing.

UNDERSTANDINg pROgRAm SCHEDUlES

Thedailyscheduleissplitintofoursections:

wAKE:6am-8am–Temperatureyouwouldprefertowakeupto,untilyouleavefortheday.

lEAVE:8am-5pm–Temperaturewhenyouareawayfromthehouseduringtheday.

RETURN:5pm-10pm–Temperatureyouwouldprefertoreturnto,untilbedtime.

SlEEp:10pm-6am–Temperatureyouwouldpreferduringthenight.

Thetimesshownarethedefaults.Thestarttimeandtemperatureofeachsectioncanbechangedtofityourschedule(seepage10).

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Event Event designator Start time

Set temps

Heat Cool

1 WAkE 6:00AM 70°F(21°C) 78°F(26°C)

2 LEAVE 8:00AM 62°F(17°C) 85°F(29°C)

3 RETURN 5:00PM 70°F(21°C) 78°F(26°C)

4 SLEEP 10:00PM 62°F(17°C) 82°F(28°C)

OpERATION & pROgRAmmINg – pROgRAmmAblE mODElS ONly (8463, 8465, 8466)

UNDERSTANDINg pROgRAm SCHEDUlES (CONTINUED)

pROgRESSIVE RECOVERy

TheProgressiveRecoveryfeatureallowsthethermostattoactivatetheheatingandcoolingequipmentpriortoaneventinordertoreachthedesiredtemperatureatthestartofthenextscheduledevent.

Example: SettheWaketimeto6am,andthetemperatureto70°.Theheatwillcomeonbefore6am,sothetemperatureis70°bythetimeyouwakeat6.

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CHANgINg pROgRAm SCHEDUlES

OpERATION & pROgRAmmINg – pROgRAmmAblE mODElS ONly (8463, 8465, 8466)

1 . press twicetoenterprogramsettingmode.StarttimeoftheWAkEeventisflashing.

2 . press or toadjustthestarttime

3 . press ,HEATsettingflashes.press ortoadjusttheheatsetting.

4. press ,COOLsettingflashes.press ortoadjustthecoolsetting.

5. press toadvancethenextevent,andrepeatsteps2-5forLEAVE,RETURNandSLEEPevents.

6. press tochangetoweekendprogram.Repeatsteps2-5fortheweekendprogram.

7 . press toend.“DONE”willdisplay.

Thethermostatwillreturntonormalmodeifnokeyispressedin3seconds.

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pROgRAm SCHEDUlE OVERRIDES (TEmpORARy, pERmANENT)

OpERATION & pROgRAmmINg – pROgRAmmAblE mODElS ONly (8463, 8465, 8466)

Temporary program override

press or toimmediatelyadjustthetemperature.Thiswilltemporarilyoverridethetemperaturesettingforthecurrentprogrammedtimeperiod.Thenewtemperaturesettingwillbemaintaineduntilthenexttimeperiodoftheprogrammedschedule.

Tocancelthetemporaryoverride,adjustthetemperaturesettingbacktotheprogrammedtemperature,orpress

twice.

permanent program override

press topermanentlyholdthetemperatureatitscurrentsetting.Thiswilloverridethetemperaturesettingsforalltimeperiodsoftheprogrammedschedule.Withthethermostatinpermanentoverride,thethermostattemperaturecanbemanuallyadjustedandwillstayatthatsettinguntiltheoverrideiscancelled.

Tocancelthepermanentoverridepress .

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RESEARCHPRODUCTSCORPORATIONP.O.BOX1467•MADISON,WI53701-1467•www.aprilaire.com

61000651 10.09B2204776C

Please…Takeafewminutestovisituson-lineatwww.aprilaire.comtoregisteryourAprilaireproduct.Ifyoudonothaveon-lineaccess,pleasemailapostcardwithyourname,address,phonenumber,productpurchased

anddateofpurchaseto:ResearchProductsCorporation,P.O.BOX1467,Madison,WI53701

ElECTRONIC THERmOSTAT fIVE yEAR lImITED wARRANTyyourResearchProductsCorporationAprilaire®Thermostatunitisexpresslywarrantedforfive(5)yearsfromdateofinstallationtobefreefromdefectsinmaterialsorworkmanship.ResearchProductsCorporation’sexclusiveobligationunderthiswarrantyshallbetosupply,withoutcharge,areplacementforanythermostatwhichisfoundtobedefectivewithinsuchfive(5)yearperiodandwhichisreturned,togetherwiththedateofinstallation,nolaterthanthirty(30)daysaftersaidfive(5)yearperiodbyyoutoeitheryouroriginalsupplierortoResearchProductsCorporation,Madison,Wisconsin53701.THISWARRANTy SHALL NOT OBLIgATE RESEARCH PRODUCTS CORPORATION FOR ANy LABOR COSTS AND SHALL NOT APPLy TO DEFECTS INWORkMANSHIPORMATERIALSFURNISHEDByyOURINSTALLERASCONTRASTEDTODEFECTSINTHETHERMOSTATITSELF.IMPLIEDWARRANTIESOFMERCHANTABILITyOFFITNESSFORAPARTICULARPURPOSESHALLBELIMITEDINDURATIONTOTHEAFORESAIDFIVE yEAR PERIOD. RESEARCH PRODUCTS CORPORATION’S LIABILITy FOR INCIDENTAL OR CONSEQUENTIAL DAMAgES, OTHER THANDAMAgES FORPERSONAL INJURIES, RESULTINg FROMANyBREACHOF THEAFORESAID IMPLIEDWARRANTIESOR THEABOVE LIMITEDWARRANTyISEXPRESSLyEXCLUDED.THISLIMITEDWARRANTyISVOIDIFDEFECT(S)RESULTFROMFAILURETOHAVETHISTHERMOSTATINSTALLEDByAQUALIFIEDHEATINgANDAIRCONDITIONINgCONTRACTOR.IFTHELIMITEDWARRANTyISVOIDDUETOFAILURETOUSEAQUALIFIEDCONTRACTOR,ALLDISCLAIMERSOFIMPLIEDWARRANTIESSHALLBEEFFECTIVEUPONINSTALLATION.Somestatesdonotallowlimitationsonhowlonganimpliedwarrantylastsortheexclusionorlimitationofincidentalorconsequentialdamages,sotheaboveexclusionsorlimitationsmaynotapplytoyou.Thiswarrantygivesyouspecificlegalrightsandyoumayalsohaveotherrightswhichvaryfromstatetostate.Thisequipment if installed in strictaccordancewith themanufacturer’s instructions, complieswith the limits foraClassBcomputingdevicepursuanttoSubpartJofPart15ofFCCRules.

wARRANTy REgISTRATION

your warranty Registration information will not be sold or shared outside of this company.

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