ICM Controls SC 2811 Installation, Operation & Application Manual page 15

SimpleComfort
Heil-Quaker 867.814 Series and PH50 Series Heat Pump Systems
24 VAC, return
R
24 VAC, common
C
Reversing valve (cooling mode)
O
Compressor contactor
Y
2nd stage heating circuit (sequencer 1)
W1
Fan contactor circuit
G
3rd stage heating circuit (sequencer 2)
W2
2811 Electronic Thermostat Conversion to:
®
SC 281 1
Electronic Thermostat
W1
R C Y1 W2 Y2
O/B
G W3