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