Programmable Thermostat Heatpump

Old 02-02-02, 11:51 AM
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Programmable Thermostat Heatpump

I have a Trane 2 stage gas furnace-electric heatpump. I purchased a Hunter 2 stage programmable thermostat but the wiring codes do not match up. The original Trane has wires on: X2,O,G,Y,T,R,W,B. The Hunter uses R,Y1,W1,W2,G,O/B,E, A, C. I've figured out the logical ones but I can't figure out the X2, T, or the O and B on the Trane. Anyone have thoughts on where they should connect on the Hunter?
Old 02-02-02, 04:47 PM
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O= reversing valve(energized in cooling)
B= common( c on new stat)
X2= E (em. heat)
T=Not used with new stat

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