Hello,
I have a heat pump with auxiliary electric heat controlled by a Trane
Weathertron thermostat. I am attempting to upgrade the thermostat with a programmable White -Rodgers(1F85-277)heat pump thermostat.I want to verify the correct wiring hookup for White-Rodgers
Thermostat to the current unit.

The current hookup for the Weathertron controller is:

Terminal "F" (color-none) Purpose-Not used,
Terminal "B" (color-Blue) purpose-24 volt common
Terminal "X2" (color-Black) Purpose-Emergency heat?
Terminal "W" (color-White) purpose-First stage Aux. Heat,
Terminal "T" (color-Tan 0 purpose- Outdoor Thermistor,
Terminal "G" (color-Green)purpose-Fan,
Terminal "O" (color-Orange) purpose-Reversing valve,
Terminal "Y"(color-yellow) purpose-First stage compressor,
Terminal "R" (color-Red) purpose-24 volt hot

Please click on the following link for referenced terminal connections in the White-Rodgers(1F85-277) manual.

http://www.white-rodgers.com/pdfs/in.../0037-6560.pdf

Regards!
Appu30

I lack experience with heat pumps, but it looks good to me. I others provided as much information in their question as you.

I added the correct terminals that the wires should connect to below:


Terminal "F" (color-none) Purpose-Not used,
Terminal "B" (color-Blue) purpose-24 volt common C
Terminal "X2" (color-Black) Purpose-Emergency heat? EW1
Terminal "W" (color-White) purpose-First stage Aux. Heat, W2
Terminal "T" (color-Tan 0 purpose- Outdoor Thermistor NOT USED
Terminal "G" (color-Green)purpose-Fan,
Terminal "O" (color-Orange) purpose-Reversing valve,
Terminal "Y"(color-yellow) purpose-First stage compressor Y1
Terminal "R" (color-Red) purpose-24 volt hot

And I must say, nice job with the information and research!

Thanks! I really appreciate your help, this came out very close what I thought.