Ask Me Help Desk - New Thermostat wiring

New Thermostat wiring

I am replacing my (old) Trane Model BAYSTAT 239 thermostat with a (new)Honeywell RTH7400 programmable thermostat. I need help wiring to the new thermostat. My H/C system is a heat pump system.
My Trane wiring:
X2----|
W ----| X2 and W were jumpered together
O
G
Y
T
R
B

New Honey Well diagram - For Heat Pump
C
G
Y
O/B
Rc --|
R --| R and Rc are jumpered together

Aux
E
L

I have been to the website that has the manual in pdf format, but it doesn't give info on matching up wire letters.

Thanks
MA

Quote:

Originally Posted by MAKinch

I am replacing my (old) Trane Model BAYSTAT 239 thermostat with a (new)Honeywell RTH7400 programmable thermostat. I need help wiring to the new thermostat. My H/C system is a heat pump system.
My Trane wiring:
X2----|
W ----| X2 and W were jumpered together
O
G
Y
T
R
B

New Honey Well diagram - For Heat Pump
C
G
Y
O/B
Rc --|
R --| R and Rc are jumpered together

Aux
E
L

I have been to the website that has the manual in pdf format, but it doesn't give info on matching up wire letters.

Thanks
MA

Possible match up

And here

https://www.askmehelpdesk.com/heatin...tml#post268211

1 Attachment(s)

Quote:

Originally Posted by hvac1000

Possible match up

and here

https://www.askmehelpdesk.com/heatin...tml#post268211

Lo