Original message
| twood5
 |  "Baystat240 to Honeywell rth7500"
, posted Wed 2 Jul 14:28  
I had a Baystat240 on my Trane xe1100 1.5 ton heat pump system. I am upgrading to a Honeywell RTH7500
The previous wiring and how I wired it per the instructions and reviewing your tips for others is this.....
B to C
G to G
Y to Y
O to O/B
R to R Leaving RC to R Jumped
W to AUX
X2 to E
Taped off T
I set the configuration to 170 7 190 0 300 1 since we live in FL and it never gets that cold. I set the system to Auto and the Fan to Auto. When I tell it to cool the house down way past the temp it currently is, the air handler inside the house (TWE024) comes on but the heat pump outside (TWN018) does not. I seem to remember both units coming on. Maybe I am wrong. Does everything look like I figured it out?
Many thanks
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Replies:
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| Houston204
| "Re(1):Baystat240 to Honeywell rth7500" , posted Wed 2 Jul 22:56
You posted everthing correctly. I would recheck the wiring at your stat. A wire may have broken or a pin connector between the stat and subbase may be bent.
"Tip of the Day" Remember to remove power first.
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