I am attempting to replace our Weathertron thermostat with a Honeywell RTH3100C. We have a Trane heatpump system. I am having trouble with the wiring. My wires don't match the 'less common wire designations' in the manual.
I have the following wires on the Weathertron:
R-red
T-brown
O-orange
G-green
Y-yellow
X2-black
B-blue
W-white
F-Pink
and a grey wire I don't think was connected to anything-it is not taped off, and we don't remember disconnecting it, it just suddenly appeared after we took off the wire plate.

Here is what I have based on the Honeywell installation guide:
E=Weathertron X2
Aux=Weathertron W
Y=Weathertron Y
G=Weathertron G or F (not sure which one to do)
O=Weathertron O
L=Weathertron F
R=Weathertron R
B=Weathertron B (not sure which one to do)
C=Weathertron B

I'm not sure where the T wire should go or what to do with the grey wire.

Thanks for the help.

I am replacing a Weathertron with a Honeywell RTH230B and need to know the appropriate wiring configuration?

Do you have schematic for the Honeywell RTH3100C?

I am attempting to replace our Weathertron thermostat with a Honeywell RTH3100C. We have a Trane heatpump system. I am having trouble with the wiring. My wires don't match the 'less common wire designations' in the manual.
I have the following wires on the Weathertron:
R-red
T-brown
O-orange
G-green
Y-yellow
X2-black
B-blue
W-white
F-Pink
and a grey wire I don't think was connected to anything-it is not taped off, and we don't remember disconnecting it, it just suddenly appeared after we took off the wire plate.

Here is what I have based on the Honeywell installation guide:
E=Weathertron X2
Aux=Weathertron W
Y=Weathertron Y
G=Weathertron G or F (not sure which one to do)
O=Weathertron O
L=Weathertron F
R=Weathertron R
B=Weathertron B (not sure which one to do)
C=Weathertron B

I'm not sure where the T wire should go or what to do with the grey wire.

Thanks for the help.

Here you go on Weathertron/same as Trane

Honeywell


http://customer.honeywell.com/techlit/pdf/PackedLit/69-1889EF.pdf

I have an old Weathertron thermostat. I just purchased a Honeywell RTH 230B programmable thermostat to replace it. Honeywell have 5 wires RH, RC, W, Y, G. But my old unit utilized 8 wires. G-green, Y-yellow, X2-black, B-blue, U_W-white, O-orange, R-red, T-brown.

See this

http://customer.honeywell.com/techlit/pdf/69-0000s/69-1800.pdf

The thermostat you have will not work with your system. You need a heat pump thermostat. READ number 1 Introduction to see what I mean.

I have a old trane mercury thermostat BAYSTAT239A trying to replace it with a honeywell thermostat RTH11B need help with wiring ?