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Wiring Requirements
The following table shows the maximum wire lengths allowed:
Thermostat to HVAC Equipment
18 AWG
128 ft (380m)
Terminal Description and Electrical Ratings
Terminal
Description
N/C
Unused
st
Y
1
st
W (O/B)
1
Reversing Valve
Changeover
G
Fan
C
Common
nd
Y2
2
nd
W2 (AUX)
2
st
1
NOTE: Factory jumper installed between RC and RH. Remove jumper for
2- - transformer applications. See wiring diagrams for additional information.
20 AWG
80 ft (240m)
Stage Compressor
Stage Heating or
Stage Compressor
Stage Heating or
Stage Aux Heat
7
22 AWG
50 ft (150m)
Voltage
Current (Max)
N/A
N/A
24V AC
2A
24V AC
2A
24V AC
2A
24V AC
2A
24V AC
2A
24V AC
2A
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