Air Conditioning 2.0

Thermostat Help! How do I connect the wires? Trane/Hunter?

Trying to figure out the correct way to fully wire a Hunter Model 44155C. Originally had a Trane thermostat (not sure of model or number).

I’m confused. Is it necessary to connect some wires or all wires to the thermostat. Like if I have both “G” and “F” do I connect just “G” or would I connect both.

Also it already has a small wire connecting RH to RC.

So I don’t need to connect the “R” (red) wire?

“If your thermostat has one wire marked R or RH, then leave the jumper wire between RH and RC on the wallplate.” Otherwise seperate RH and RC wires (5 wire system).

Trane wiring (Color Coded):

X2 = Black
O= Orange
G = Green
Y = Yellow
T = Greyish/Black
W = White
R = Red
B = Blue

U - Not used
F - Not used

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Hunter Wiring (according to manual):

RH, R, 24 Volt

RC, VC 24 Volt Cool

G or F Fan

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Y,C, or M Air Conditioning compressor

or

O Reversing Valve operating in Cool Mode

————————————–…

W or H Heating

Or

R Reversing Valve operating in Heat Mode

————————————–…

Y1 Heat Pump Compressor

Thanks for the help. May post more info.

Trane uses W for your auxilliary heat ,x2 for emergency heat,B for neutral,R for hot,G for fan,F is just a malfunction light and might not be used on your new stat,Y for the compressor, and O for the reversing valve, energized in the cool mode,T I’m not sure but probably not used like F.Make certain you bought the correct stat.Good luck

Air Conditioning Heating Cooling Trane