Rheem heat pump and RTH7500 - http://www.hvacmechanic.com/ Forums

Original message

dbrabrand

65.40.126.48

"Rheem heat pump and RTH7500" , posted Thu 31 Jan 20:11

I have a Rheem heat pump and am trying to replace an older Honeywell thermostat with a RTH7500. My old thermostat base is Q674L 1520. I have the following wires from my heat pump (label - wire color):

W2 - White
Y - Yellow
R - Red
G - Green
X - Brown
B - Blue

My confussion is the that the wiring guide on the new thermostat seems to give a few different options for where to connect the X and B wires and I'm not certain where to connect them. Any assistance would be appreciated!

Thanks,

Dan

Replies:

Houston204

98.196.66.53

"Re(1):Rheem heat pump and RTH7500" , posted Thu 31 Jan 20:31

New terminal = wire
C = brown
G = green
Y = yellow
O/B = blue
Rc & R = red (use provided jumper)
Aux & E = white (use a jumper wire)

Option 170 = 7
option 190 = 1

"Tip of the Day" Remember to remove power first.

dbrabrand

65.40.126.48

"Re(2):Rheem heat pump and RTH7500" , posted Thu 31 Jan 20:38

Thank you very much Houston!