Hi I just purchased a Honeywell rth7500d for my home. I currently have a baystat 240 with a Trane heat pump with strip back up. I have tried to trace the wires and figure witch one goes to the new thermostat but with no luck. My baystat has r t o g y x2 b u w. I drew a diagram of the old wires and marked witch color went where. The Honeywell has c g y o/b rc r w2 e2 l. Can anyone help me figure out witch goes where? Thanks for any help

Hi I just purchased a Honeywell rth7500d for my home. I currently have a baystat 240 with a Trane heat pump with strip back up. i have tried to trace the wires and figure witch one goes to the new thermostat but with no luck. My baystat has r t o g y x2 b u w. I drew a diagram of the old wires and marked witch color went where. The Honeywell has c g y o/b rc r w2 e2 l. Can anyone help me figure out witch goes where? Thanks for any help


Here is a old wiring changeover chart that might help.