Wiring for Honeywell Thermostat - http://www.hvacmechanic.com/ Forums

Original message

mileyjn

74.184.83.117

"Wiring for Honeywell Thermostat" , posted Mon 11 Aug 22:33

Currently the Rudd Thermostat and Rudd Heatpump is wired this way.

G - Green wire
R - Red Wire
Y - Yellow Wire
B - Blue Wire
X - Brown Wire
W2 - White and another White wire from W2 to E

Trying to connect a Honeywell Programmable thermostat model RTH7400D.

Need help with the wiring and setting this thermostat to the Rudd heatpump.

Thanks
Joe

Replies:

Houston204

98.196.66.53

"Re(1):Wiring for Honeywell Thermostat" , posted Mon 11 Aug 22:42

Y = Y
G = G
X = C
B = O/B
W2 & E = Aux & E
R = Rc & R

option 170 = 7
190 = 1
240 = 9

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