Aprilaire 8400 series Setup guide

8400 Series Thermostats
READ AND SAVE THESE INSTRUCTIONS
Safety &
Installation
Instructions
61000652C 8400 Tstat Install.indd 1 10/13/09 11:08:56 AM

2
Installation location recommendations................................................................3
Outdoor temperature sensor (optional) ................................................................4
Thermostat mounting..............................................................................5
Power & reset options.............................................................................5
Wiring terminal ..................................................................................6
Wiring diagrams .................................................................................7
TABLE OF CONTENTS
INSTALLATION
SETUP & TESTING
REFERENCES
System setup instructions .........................................................................11
System test mode ...............................................................................16
Quick reference to controls & display
 •Non-programmablemodels(8444,8446,8448).....................................................22
 •Programmablemodels(8463,8465,8466).........................................................23
Thermostat features .............................................................................24
Troubleshooting .................................................................................25
Specifications...................................................................................27
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3
INSTALLATION
INSTALLATION LOCATION RECOMMENDATIONS
Thermostat should be mounted:
•Onaninteriorwall,inafrequentlyoccupiedspace.
•Approximately5‘abovefloor.
•Atleast18”fromoutsidewall.
•Thermostatcanbemountedtoaverticaljunctionbox.
Do not mount thermostat:
•Behinddoors,incorners,orotherdeadairspaces.
•Indirectsunlight,nearlightingfixtures,orother
appliancesthatgiveoffheat.
•Onanoutsideorunconditionedareawall.
•Intheflowofasupplyregister,instairwells,ornear
outside doors.
•Onawallwithconcealedpipesorductwork.
61000652C 8400 Tstat Install.indd 3 10/13/09 11:08:57 AM

4
OUTDOOR TEMPERATURE SENSOR (OPTIONAL)
Outdoortemperaturecanbemeasuredbyattachingan
8052sensortotheS1andS2terminals.Systemsetting
#05(Remotesensor)isusedtoenablesensor.
Heat pump models can use the outdoor temperature to
effectivelyutilizetheheatpump:
•WhentheoutdoortemperatureislessthantheLow
BalancePoint,theheatpumpwillbelockedoutand
onlyauxiliaryheatingwillbeused.
•WhentheoutdoortemperatureishigherthantheHigh
BalancePoint,theauxiliaryheatingwillbelockedout
andonlytheheatpumpwillbeusedtoprovideheating.
INSTALLATION
C
G
Y
W
RL
S1 S2 O/B W2 Y2
RC
•Installonsideofbuildingoutofdirectsunlight
(north side recommended).
•Mountabovesnowline.
•Mountatleast3’awayfromexhaustventsand
condensing lines.
•Maximumwirelengthis300’.
•Donotroutewiresalong120VAClines.
61000652C 8400 Tstat Install.indd 4 10/13/09 11:08:57 AM

5
THERMOSTAT MOUNTING
1.Removethebackofthethermostat,bypressingthe
tabonthebottomoftheunit.
2.Pullwiresthroughtheopeningonthebackofthe
thermostat.
3.Positionandlevelthebackofthethermostatonwall
and mark the hole locations with a pencil.
4.Drill1/4”holes&insertsuppliedanchors(drywallonly).
5.Placebackoveranchors,insertandtightenscrews.
6.Sealwireentryholestopreventdraftsaffecting
temperature readings.
INSTALLATION
POWER & RESET OPTIONS
Thethermostatisdualpower.ItcaneitherbeACor
batterypowered,orboth(toprovidebackuppowerfor
theclock).Batteriesareoptionalifthethermostatwas
connectedtoACpowerwheninstalled.
Forheatpumpmodels(8446,8448HP,8465,8466HP)
24VACmustbeconnectedinorderforthesystemfault
and emergency heat indicators to operate.
Thethermostathasamemorybackupthatsavesthe
thermostat’ssettingsincaseofapowerinterruption.
Theresetbuttonlocatedunderthebatterycovercanbe
usedtoresetthethermostatbacktofactorydefaults.
Thesystemsettingswillalsoberesetbacktodefaults.
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6
WIRING TERMINAL
Wire specifications
18-24gaugethermostatwire
Installation notes
•EnsurepowerattheHVACequipmentisoff.
•Loosenscrewterminals,insertstrippedwireand
re-tighten.
•Pushtheexcesswirebackintotheopeningandplug
thewallopeningtopreventdrafts.
INSTALLATION
RC–24VACsupplycooling*
R–24VACsupplyheating*
W–1ststageheat/auxiliary
Y–1ststagecooling/compressor
G– Fan
C–Common(optionalwhenpoweredbybatteries)
S1 & S2 – outdoor temperature sensor (optional)
O/B–Reversingvalve
L– System fault indicator
W2–2ndstageheat/auxiliary
Y2–2ndstagecooling/compressor
*Jumper between RC & R is used in single transformer systems
(see wiring diagrams).
C
G
Y
W
RL
S1 S2 O/B W2 Y2
RC
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WIRING – MODEL 8463 & 8444 SINGLE
TRANSFORMER (USE JUMPER WIRE)
INSTALLATION
C
G
Y
W
RS1 S2
RC
HEATING
COOLING
FAN
OUTDOOR TEMP
SENSOR
JUMPER
TRANSFORMER
WIRING – MODEL 8463 & 8444 TWO
TRANSFORMERS (REMOVE JUMPER WIRE)
C
G
Y
W
RS1 S2
RC
HEATING
COOLING
FAN
OUTDOOR TEMP
SENSOR
HEATING
TRANSFORMER
COOLING
TRANSFORMER
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WIRING – MODEL 8465 & 8446 SINGLE
TRANSFORMER (USE JUMPER WIRE)
INSTALLATION
AUX HEATING
COMPRESSOR
FAN
REVERSE VALVE
FAULT DETECT
OUTDOOR TEMP
SENSOR
JUMPER
TRANSFORMER
C
G
Y
W
RL
S1 S2 O/B
RC
WIRING – MODEL 8465 & 8446 TWO
TRANSFORMERS (REMOVE JUMPER WIRE)
AUX HEATING
COMPRESSOR
FAN
REVERSE VALVE
FAULT DETECT
OUTDOOR TEMP
SENSOR
AUX HEATING
TRANSFORMER
HEAT PUMP
TRANSFORMER
C
G
Y
W
RL
S1 S2 O/B
RC
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WIRING – MODEL 8466 & 8448 SINGLE
TRANSFORMER (USE JUMPER WIRE)
FOR HEAT/COOL SYSTEM
INSTALLATION
1st HEATING
1st COOLING
FAN
2nd HEATING
2nd COOLING
OUTDOOR TEMP
SENSOR
NOT USED NOT USED
JUMPER
TRANSFORMER
C
G
Y
W
RL
S1 S2 O/B W2 Y2
RC
WIRING – MODEL 8466 & 8448 TWO
TRANSFORMERS (REMOVE JUMPER WIRE)
FOR HEAT/COOL SYSTEM
1st HEATING
1st COOLING
FAN
2nd HEATING
2nd COOLING
OUTDOOR TEMP
SENSOR
NOT USED NOT USED
HEATING
TRANSFORMER
COOLING
TRANSFORMER
C
G
Y
W
RL
S1 S2 O/B W2 Y2
RC
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INSTALLATION
WIRING – MODEL 8466 & 8448 SINGLE
TRANSFORMER (USE JUMPER WIRE)
FOR HEAT PUMP SYSTEM
1st AUX HEATING
1st COMPRESSOR
FAN
REVERSE VALVE
FAULT DETECT
2nd AUX HEATING
2nd COMPRESSOR
OUTDOOR TEMP
SENSOR
HEAT PUMP
TRANSFORMER
C
G
Y
W
RL
S1 S2 O/B W2 Y2
RC
JUMPER
1st AUX HEATING
1st COMPRESSOR
FAN
REVERSE VALVE
FAULT DETECT
2nd AUX HEATING
2nd COMPRESSOR
OUTDOOR TEMP
SENSOR
HEATING
TRANSFORMER
HEAT PUMP
TRANSFORMER
C
G
Y
W
RL
S1 S2 O/B W2 Y2
RC
WIRING – MODEL 8466 & 8448 TWO
TRANSFORMERS (REMOVE JUMPER WIRE)
FOR HEAT PUMP SYSTEM
61000652C 8400 Tstat Install.indd 10 10/13/09 11:08:59 AM

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SYSTEM SETUP INSTRUCTIONS
How to enter the system setup menu to change
system settings
Press repeatedly until system is set to OFF.
Press and hold and for three seconds.
Thescreenofthefirstsettingwillbedisplayed.
SETUP & TESTING
Press or to change the setting.
Press tochangetothenextoption.
Press afterthelastsetting.“DONE”willbe
displayed.
ThethermostatwillreturntoNormalmodeifnokeyis
pressed in 3 seconds.
Toresetallsystemsettingsbacktodefault,pressthe
RESETbuttonlocatedunderthebatterydoor.
Thefollowinginstructionsshowhowtoenterthesystemsetupmenuandchangesettings.Thetableonthe
followingpagesliststhesettingsandtheirdetails.Defaultsettingsareshowninbold. Some settings are only
availabletocertainmodels,andsomearespecifictothermostatssettoheatpumpmode.
SYSTEMSETTINGNUMBER
SETTINGVALUE
61000652C 8400 Tstat Install.indd 11 10/13/09 11:08:59 AM

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SETUP & TESTING
SYSTEM SETUP INSTRUCTIONS (CONTINUED)
Thermostatmodels8448&8466havetheoptionofbeingusedinheatpumporheat/coolsystems.SwitchSW1
locatedonthebackofthethermostat’sfaceisusedtoselectthis.Systemsettingnumber00willonlybeshownon
these models to display the position of SW1.
SW1
HEATPUMP
HEAT/COOL
61000652C 8400 Tstat Install.indd 12 10/13/09 11:08:59 AM

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SETUP & TESTING
System setting Setting range, default in bold
00Equipmenttype(8466,8448)(Set by SW1) 0:heat/cool
1:heatpump
01 Temperature scale 0 : Fahrenheit
1:Celsius
02 Fan control in heating 0 : Gas or oil furnace (Equipment controls fan)
1:Electric(Thermostatcontrolsfan)
03 Offset temperature for internal sensor 0° : No offset applied
–4°Fto+4°F(–2°Cto+2°C)
04Automode 0 : Auto mode is disabled
1:Automodeisenabled
05 Outdoor temperature sensor 0 : No outdoor temperature sensor attached
1:Outdoortemperaturesensorattached
06Compressorminimumofftime 5 minutes
1 to 5 minutes in 1 minute steps
07 Heating minimum off time 2 minutes
1 to 5 minutes
08Equipmentminimumontime 2 minutes
1 to 5 minutes
SYSTEM SETUP INSTRUCTIONS (CONTINUED)
61000652C 8400 Tstat Install.indd 13 10/13/09 11:08:59 AM

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SETUP & TESTING
System setting Setting range, default in bold
09 1st stage differential 1°F (0.5°C)
1°Fto4°F(0.5°Cto2°C)
102ndstagedifferential(8448,8466) 1°F (0.5°C)
1°Fto4°F(0.5°Cto2°C)
113rdstagedifferential(8448HP,8466HP) 1°F (0.5°C)
1°Fto4°F(0.5°Cto2°C)
12Reversevalve(8446,8466HP,8465,8466HP) 0 – O/B energized in cooling (O)
1–O/Benergizedinheating(B)
13Integralfactorperiod(P+Icontrol)*
Set to OFF for proportional control only
4 minutes
1to5minutesor“OFF”todisable
14Deadband(automode) 3°F (2°C)
2°Fto5°F(1°Cto3°C)
15Progressiverecovery(8463,8465,8466) 0:Progressiverecoveryisdisabled
1 : Progressive recovery is enabled
*Theintegralfactorisusedintheequipmentcontrolalgorithmtomaintainthespacetemperatureatsetpoint.
Ashortintegralfactorperiodwillincreasethenumberofcyclesperhour.(Ashortintegralfactorperiodwillbemore
comfortable.)Alongintegralfactorperiodwilllowerthenumberofcyclesperhour.(Alongintegralfactorperiodwill
bemoreeconomical.)
SYSTEM SETUP INSTRUCTIONS (CONTINUED)
61000652C 8400 Tstat Install.indd 14 10/13/09 11:09:00 AM

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SETUP & TESTING
System setting Setting range, default in bold
16LowBalancePt.(8446,8448HP,8465,8466HP)
Systemsetting05mustbeenabled
20°F (–7°C)
1°Fto35°F(–17°Cto1°C)or“OFF”todisable
17HighBalancePt.(8446,8448HP,8465,8466HP)
Systemsetting05mustbeenabled
60°F (16°C)
40°Fto80°F(4°Cto27°C)or“OFF“todisable
19Programformat(8463,8465,8466) 0 – 5/2 program (Weekdays and Weekends)
1–5/1/1program(Weekdays,Sat.andSun.)
20Changeairfilter OFF
1,3,6,12monthsor“OFF”todisable
21Changewaterpanel**
Setnumberofmonthsuntilreminderisrequired
OFF
1to12monthsor“OFF”todisable
22Humidifiertype** 0 : Flow through type humidifier (1 reminder per season)
1:Drain-lesstypehumidifier(2 reminders per season)
23Servicedehumidifier OFF
1to12monthsor“OFF”todisable
24ServiceHVAC OFF
1to12monthsor“OFF”todisable
**IfhumidifiertypeissettoDrain-less,thenthefirstreminderisbasedonthesystemsetting21,secondreminder
willactivate3monthslater.IfhumidifiertypeissettoFlowthrough,thenthefirstreminderisbasedonsystem
setting21,secondreminderwillactivate12monthslater.
SYSTEM SETUP INSTRUCTIONS (CONTINUED)
61000652C 8400 Tstat Install.indd 15 10/13/09 11:09:00 AM

16
SYSTEM TEST MODE
Thesystemtestmodeisusedtotestasystemafterinstallation.Theoutputsofthethermostatcanbemanually
activatedoneatatimetotesttheirfunction.Thefollowinginstructionsshowhowtoenterthetestmodeandturn
outputs on and off. The charts on the following pages show all of the options for each model.
The test steps are:
SETUP & TESTING
Test
Number
Heat/Cool Models
8444, 8463, 8448HC, 8466HC
Heat Pump Models
8446, 8465, 8448HP, 8466HP
50 Heating (W) (W2) AuxHeating(W)(W2)
51 Cooling(Y)(Y2) CompressorCooling(Y)(Y2)
52 Fan(G) CompressorHeating(Y)(Y2)
53 Fan(G)
61000652C 8400 Tstat Install.indd 16 10/13/09 11:09:00 AM

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How to enter the system test menu
Press repeatedly until system is set to OFF.
Press and hold and for three seconds.
Thescreenofthefirstteststep#50isdisplayed:
SYSTEM TEST MODE (CONTINUED)
SETUP & TESTING
Press toturnontheoutput(01).Formultistage
output,press againtoturnonthe2ndstage(02).
Press toturnofftheoutput(00).
Press tochangetothenextteststep.
Press afterthelastteststep.“DONE”willbe
displayed.
ThethermostatwillreturntoNormalmodeifnokeyis
pressed in 3 seconds.
SYSTEMTEST
NUMBER
OUTPUTSTATUS
FLASHESIF24VAC
ISNOTPRESENT
MODE(SW1SETTING
8448&8466ONLY)
61000652C 8400 Tstat Install.indd 17 10/13/09 11:09:00 AM

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SETUP & TESTING
Test steps for 8444 & 8463
Step Key Input
System Setting Display (Output)
#2
01
HEATING
ON (W)
01
COOLING
ON (Y)
01
FAN ON
(G)
#50Heat [UP] 0:Gas ON
1:Elec ON ON
[DOWN]
#51Cool [UP] ON ON
[DOWN]
#52 Fan [UP] ON
[DOWN]
61000652C 8400 Tstat Install.indd 18 10/13/09 11:09:01 AM

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SETUP & TESTING
Test steps for 8448HC & 8466HC
Step Key Input
System Setting Display (Output)
#2
01
HEATING
ON (W)
02
HEATING
ON (W2)
01
COOLING
ON (Y)
02
COOLING
ON (Y2)
01
FAN ON
(G)
#50Heat
1st[UP] 0:Gas ON
1:Elec ON ON
2nd[UP] 0:Gas ON ON
1:Elec ON ON ON
[DOWN]
#51Cool
1st[UP] ON ON
2nd[UP] ON ON ON
[DOWN]
#52 Fan [UP] ON
[DOWN]
61000652C 8400 Tstat Install.indd 19 10/13/09 11:09:01 AM

20
Test steps for 8446 & 8465
Step Key Input
System Setting Display (Output)
#2 #12
01 AUX
HEATING
ON (W)
01
COOL/HEAT
ON (Y)
01
FAN ON
(G)
O/B
#50Aux [UP] 0:Gas
ON
1:Elec ON ON
[DOWN]
#51Cool
[UP] 0:O ON ON ON
1:B ON ON
[DOWN] 0:O ON
1:B
#52 Heat
[UP] 0:O ON ON
1:B ON ON ON
[DOWN] 0:O
1:B ON
#53 Fan [UP] ON
[DOWN]
SETUP & TESTING
61000652C 8400 Tstat Install.indd 20 10/13/09 11:09:01 AM