Lennox Hp21 With Cb21 Pcb Heat Pump Systems - ICM Controls SC 2210 Installation, Operation & Application Manual

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Lennox HP21 With CB21 PCB Heat Pump Systems

24 VAC, Return
R-VR
Compressor Contactor
Y1
Reversing Valve (Cooling Mode)
O
Fan Contactor Circuit
F
Emergency Heating Circuit
E
2nd Stage Heating Circuit
W1
System Monitor LED
L
24 VAC, Common
X
2nd Stage Cooling Circuit
Y2
2210 Electronic Thermostat Conversion to:
®
SC 2210 Electronic Thermostat