C
Rh
Rc
G
W1/E
W2/AUX
Y1
Y2
O
B
24VAC common wire
24VAC power from heating transformer
24VAC power from cooling transformer
Fan relay
Stage1 heat relay /Emergency heat
Stage2 heat relay /Auxiliary heat
Stage1 cool relay
Stage2 cool relay
Cooling changeover valve
Heating changeover valve
Use the stickers from step 2 as a guide and insert the wires into your thermostat
terminal blocks.................................................................................................................Page9
Before doing anything else, power off your system..........................................................Page6
Overview of steps
Step1 Power off your HVAC system
Step2 Label the wires
Step3 Connect wires
Step4 Attach back plate to wall
Step5 Installing front plate
Step6 Power on your HVAC system
Label each wire with the provided stickers.......................................................................Page7
Secure the back plate to your wall with the provided screws...........................................Page16
Align the front plate to the back plate and then snap into place back plate.....................Page17
Power back on your HVAC equipment.............................................................................Page18
Terminal descriptions
