Original message
| gabrielnorbac
 |  "thermostat"
, posted Thu 31 Jul 15:28:  
I have a trane BAY28X139 and I'm replacing for a robertshaw 9620 is for heat pump with 2 stage heat 1 stage cool on the old one have a conection with letter T I don't have that one on the new the old one have R 24V,G FAN,Y COOL,X2 second heat stage,W heat,BHEAT REVERSING VALVE,O reversing cool valve what the conecyion 'T' does thank you
[this message was edited by gabrielnorbac on Thu 31 Jul 15:29] |
| Replies:
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| theduke03
| "Re(1):thermostat" , posted Thu 31 Jul 19:03
Don't turn the heat on yet. The B wire is not the heat reversing valve on the old stat. B is common(C). Connect the old B to the new C. Disconnect T and tape it off(unused).
"My dad was the most feared furnace fighter in Northern Indiana."
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