GE PROGRAMMABLE THERMOSTAT User manual

49-50274 03-11 GE
PROGRAMMABLE
THERMOSTAT
Installation Instructions

2
WARNING:
SAVE thESE inStructionS
IMPORTANT SAFETY INSTRUCTIONS
RISK OF ELECTRICAL SHOCK OR FIRE. MAY CAUSE INJURY AND/OR
DEATH.
· Onlyanauthorized,qualiedinstallershouldinstallthisunit.All
manual/safetyinstructionsandelectricitysupplier’sregulations
mustbeadheredto.
· DONOTconnectanyofthethermostatterminalstoa110V/220VAC
supply.
· ThisisaClass3deviceandmustbeoperatedbyanapproved18-
30VACpowersource.
· ThisdevicemustbeconnectedtotheHVACpowersupply(18-30VAC)
oraUL,cUL,CSA,orETLapprovedtransformer.
· Thisdeviceisnotintendedforuseinbathrooms,laundryareas,or
similarindoorhighhumiditylocations.
· Keepthisdeviceawayfromallliquids.
· Cleanthedevicewithadry,softcloth.Donotusesolventsor
aggressivecleaningagents.
NOTICE:
· Thisdeviceshallonlybeusedforitsintendedpurposeasdescribedin
thisOwner’sManual.
· Ifthisisanewinstallation,locatethethermostat4to5feetabovethe
oorinaccordancewithapplicablebuildingcodes.
· Installthedeviceinalocationthatprovidesgoodairow
characteristicsandavoidareasbehinddoors,nearcorners,airvents,
directsunlight,orheatgeneratingdevices.Installationintheseareas
couldimpactthermostatperformance.
· DonotselectCOOLmodeiftheoutsidetemperatureisbelow50° F
(10°C).Thiscoulddamagethecontrolledcoolingsystemandcause
personalinjury.
· ThedisconnectionmeansforthisdeviceisType1B.
· Thisdeviceisclassiedasapollutiondegree2.
· Theratedimpulsevoltageofthisdeviceis330V.
INSTALLATION:
Pleaserefertotheinstallationinstructionsincludedwiththisthermostat.
WiringdiagramsandterminalinformationarelocatedintheAppendix
ofthisdocument.

3
Installation Instructions
1.Alwaysturnopowertotheairconditioningorheatingsystem
priortoinstallingthermostat.
2.DeterminetheHVACequipmenttype.Compatibleequipment
is:
a.1StageHeat/1StageCoolConventionalSystem
b.2StageHeat/2StageCoolConventionalSystem
c.3StageHeat/2StageCoolConventionalSystem
d.1StageHeat/1StageCoolHeatPumpSystem
e.2StageHeat/2StageCoolHeatPumpSystem
f.3StageHeat/2StageCoolHeatPumpSystem
3.Refertothewiringdiagramstodeterminethenumberof
wiresnecessarytoinstallthisthermostat.
4.Ensurethepowertotheairconditioningorheatingsystemis
turnedo.
5.Removefrontofthermostatbodyfromsub-base.
6.Guidethermostatwiresthroughcenterholeinsub-base.
7.Placethethermostatsub-baseagainstwallinthedesired
thermostatlocation.
8.Markplacementofmountingholesasappropriate.
9.Removethermostatsub-basefromwallandinstallwall
anchorsasrequiredatmountingholelocations.
10.Re-insertwiresthroughcenterholeofsub-baseandreplace
sub-baseonwall.

4
Installation Instructions (continue)
11.Fastensub-basetowallusingsupplied#6screwsintowall
anchors.
12.Refertowiringdiagramsandwirethermostatsub-basetothe
attachedHVACequipment.
13.Topreventelectricalshortsandpotentialdamagetothe
thermostat,ensureallofthesub-basewire connectionsare
secureandarenottouchinganyotherterminal.Pushany
excesswirebackintowallcavityandinsulatewireopening
withsuitablematerial.
14.Onthermostatbody,locateswitchSW1onthermostatcircuit
board.
15.SetswitchSW1-2toHPforheatpumpsystemorSTDfor
conventional(orStandard)system.
Forheatpumpsystem,setswitchSW1-1toE/Bforheat
changeovervalveorG/Oforcoolchangeovervalve.For
conventional(orStandard)system,setswitchSW1-1toE/Bfor
ElectricorG/OforGas.
16.Attachfrontbodyofthermostattosub-baseofthermostat,
beingcarefultoaligntheterminalpinsonthefrontbodywith
theterminalblockonthesub-base.
17.RestoresystempowerandcontinuetoTestthethermostat.
ON
12
ON
12
ON
12
ON
12
Electric
Heat-Cool
Gas
Heat-Cool
Heat
PumpO
Heat
PumpB

5
Thermostat System Testing
Conventional HVAC System
1.HoldtheMENUbuttonandthenpresstheResetpinhole.
WhenINSTALLATIONMODEisdisplayed,releasedtheMENU
button.Alloutputsshallbeturnedo.
2.“HVAC:ELECHeat/Cool”indicatesyousetElectric
ConventionalSystem,“HVAC:GASHeat/Cool”indicatesyou
setGasConvectionalSystem.Ifitisincorrect,pleasereview
thepositionsofswitchSW1.
3.“FAN”shouldbehighlighted.PresstheUPorDOWNbuttonto
toggletheFANoutput(ON/OFF).AftertestingtheFANoutput,
keepitinONsettingtotestotheroutputs.
4.PresstheNEXTbuttontohighlight“COOL:Stage1”.Pressthe
UPorDOWNbuttontotoggletheCOOLStage1output(ON/
OFF).
5.PresstheNEXTbuttontohighlight“COOL:Stage2”.Pressthe
UPorDOWNbuttontotoggletheCOOLStage2output(ON/
OFF).
6.PresstheNEXTbutton.Allcooloutputswillbeturnedo.The
fanoutputwillbeturnedoforaGASSystem.Thefanoutput
willbekeptinitscurrentstateforanElectricSystem.
HEAT:Stage1”ishighlighted.PresstheUPorDownbuttonto
toggletheHEATstage1output(ON/OFF).
7.PresstheNEXTbuttontohighlight“Stage2”.PresstheUPor
DOWNbuttontotoggletheHEATStage2output(ON/OFF).
8.PresstheNEXTbuttontohighlight“Stage3”.PresstheUPor
DOWNbuttontotoggletheHEATStage3output(ON/OFF).
9.PresstheResetpinholetoexitINSTALLATIONMODE.

6
1H1C or 2H1C Heat Pump Testing
1.HoldtheMENUbuttonandthenpresstheResetpinhole.
WhenINSTALLATIONMODEisdisplayed,releasetheMENU
button.Alloutputsshallbeturnedo.
2.“HVAC:HeatPump<0>”indicatesyousetthechangeover
valueto0.“HVAC:HeatPump<B>”indicatesyousetthe
changeovervaluetoB.Ifitisincorrect,pleasereviewthe
positionsofswitchSW1.
3.“STAGE”shouldbehighlighted.Thedefaultsettingis“2H/2C
or3H/2C”.PresstheUPorDOWNbuttontoselect“1H1Cor
2H/1C”.
4.PresstheNEXTbuttontohighlight“FAN”.PresstheUPor
DOWNbuttontotoggletheFANoutput(ON/OFF).Aftertesting
theFANoutput,keepitintheONsettingtotestotheroutputs.
5.PresstheNEXTbuttontohighlight“COOL:Stage1”.Pressthe
UPorDOWNbuttontotoggletheCOOLStage1output(ON/
OFF).
6.PresstheNEXTbutton.Allcooloutputswillbeturnedo.The
fanoutputwillremaininitscurrentstate.“HEAT:Stage1”is
highlighted.PresstheUPorDownbuttontotoggletheHEAT
stage1output(ON/OFF).
7.PresstheNEXTbuttontohighlight“AUX”.PresstheUPor
DOWNbuttontotoggletheAuxiliaryHeatingoutput(ON/OFF).
8.PresstheNEXTbuttontohighlight“EMER”.PresstheUPor
DOWNbuttontotoggletheEMERGENCYoutput(ON/OFF).
9.PresstheResetpinholetoexitINSTALLATIONMODE.

7
2H2C or 3H2C Heat Pump Testing
1.HoldtheMENUbuttonandthenpresstheResetpinhole.
WhenINSTALLATIONMODEisdisplayed,releasetheMENU
button.Alloutputsshallbeturnedo.
2.“HVAC:HeatPump<0>”indicatesyousetthechangeover
valueto0.“HVAC:HeatPump<B>”indicatesyousetthe
changeovervaluetoB.Ifitisincorrect,pleasereviewthe
positionsofswitchSW1.
3.“STAGE”shouldbehighlighted.PresstheUPorDOWNbutton
toselect“2H2C”.
4.PresstheNEXTbuttontohighlight“FAN”.PresstheUPor
DOWNbuttontotoggletheFANoutput(ON/OFF).Aftertesting
theFANoutput,keepitintheONsettingtotestotheroutputs.
5.PresstheNEXTbuttontohighlight“COOL:Stage1”.Pressthe
UPorDOWNbuttontotoggletheCOOLStage1output(ON/
OFF).
6.PresstheNEXTbuttontohighlight“COOL:Stage2”.Pressthe
UPorDOWNbuttontotoggletheCOOLStage2output(ON/
OFF).
7.PresstheNEXTbutton.Allcooloutputswillbeturnedo.The
fanoutputwillremaininitscurrentstate.“HEAT:Stage1”is
highlighted.PresstheUPorDOWNbuttontotoggletheHEAT
stage1output(ON/OFF).
8.PresstheNEXTbuttontohighlight“Stage2”.PresstheUPor
DOWNbuttontotoggletheHeatStage2output(ON/OFF).
9.PresstheNEXTbuttontohighlight“AUX”.PresstheUPor
DOWNbuttontotoggletheAuxiliaryHeatingoutput(ON/OFF).
10.PresstheNEXTbuttontohighlight“EMER”.PresstheUPor
DOWNbuttontotoggletheEMERGENCYoutput(ON/OFF).
11.PresstheResetpinholetoexitINSTALLATIONMODE.

8
Terminal Denition
L
C
G
Y
Y2
W
W2/E
W3/O/B
RH
RC
Terminal Convectional Heat
Cool
System
Heat Pump
System
L No Use System Monitor
C 24VAC Common for control circuit and ther-
mostat power input
G FAN
Y 1st stage cooling 1st stage
compressor
Y2 2nd stage cooling 2nd stage
compressor
W 1st stage heating Auxiliary heating
W2/E 2nd stage heating Emergency
heating
W3/O/B 3rd stage heating Changeover Valve
RH 24VAC Power supply for Heating side
RC 24VAC Power supply for Cooling side

9
Transformer
O/B relay
O/B
E
W
Rc
RH
Y
Y2
G
L
C
Changeover Valve
Aux Heang
Emergency
Emergency relay
Auxiliary heang relay
1st Compressor Relay
2nd Compressor Relay
Fan relay
AC_ IN
Power Su pply
AC_ IN
MCU
1st Compressor
2nd Compressor
Jumper Wire
FAN
FAULT DETECT
Heat Pump
24VAC
Wiring Diagram for Heat Pump System

10
1st heang relay
W3
W2
W
Rc
RH
Y
Y2
G
L
C
3rd HEATING
1st HEATING
2nd HEATING
Transformer
2nd heang relay
3rd heang relay
1st cooling relay
Fan relay
AC_ IN
Power Su pply
AC_ IN
1st Cooling
2nd Cooling
Jumper Wire
FAN
24VAC
Heat Cool
2nd cooling relay
Wiring Diagram for Conventional Heat/Cool
System