Wiring Honeywell RTH6450D for AC and heat


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Old 07-27-14, 01:51 PM
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Wiring Honeywell RTH6450D for AC and heat

Here is old config:

G
C
R
W1/Y (yellow wire to Y with jumper to W1)
O
W2


Honeywell RTH6450D has wiring for "conventional" and "heat pump":

Y2 = L
W2 = Aux/E
G = G
W1 = O / B
Y = Y
R = R
Rc = Rc

R and Rc are jumped together.

I tried leaving C un-connected, tied W2 to W2, G to G, O to O/B (which is also W1), Y to Y and R to R, Rc. In this configuration "cool" = hot air, "heat" = cool air.

Any ideas would be grateful.
 
  #2  
Old 07-27-14, 04:14 PM
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You must also configure the thermostat to control a heat pump with Aux heat.
Set function 1 to 5.
 
 

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