6
Wiring Requirements
The following table shows the maximum wire lengths allowed:
Thermostat to HVAC Equipment
18 AWG 20 AWG 22 AWG
128 ft (380m) 80 ft (240m) 50 ft (150m)
Terminal Description and Electrical Ratings
Terminal Description Voltage Current (Max)
N/C Unused N/A N/A
Y 1
st
Stage Compressor 24V AC 2A
W(O/B) 1
st
Stage Heating or
Reversing Valve
Changeover
24V AC 2A
G Fan 24V AC 2A
C Common 24V AC 2A
Y2 2
nd
Stage Compressor 24V AC 2A
W2 (AUX) 2
nd
Stage Heating or
1
st
Stage Aux Heat
24V AC 2A
NOTE: Factory jumper installed between RC and RH. Remove jumper for
2--transformer applications. See wiring diagrams for additional information.
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