User's Manual

8
Step 4 - Label&DisconnectWires
1) Onebyone,applyalabel
designated to each wire
you disconnect from
your current thermostat.
TIP:Beforedisconnectinganywires,
take a photo of your current wire
configurationwithyourmobiledevice.
 Wirefromthe  Installonthe
 oldthermostat Function newthermostat Wire
terminal marked connector marked Color
G or F Fan G
 Y1,Y Cooling Y1
 W1,W Heating W1/0/B
 Rh,R,M,Vr,A Power R
C Common C
 O/B Rev.Valve W1/O/B*
 W2 2ndStageHeat W2
 Y2 2ndStageCooling Y2
 W3 3rdStageHeat W3
 H,Hum Humidity HUM
 D,Dehum Dehumidity DEHUM
 Ck1 DryContactSwitch DRYCONTACT
 CKGND DryContactSwitch DRYCONTACT
*O/BisusedifyoursystemisaHeatPump.