Wiring an old system - http://www.hvacmechanic.com/ Forums
Original message
| agood1
 |  "Wiring an old system"
, posted Tue 3 Jun 21:57  
Hello, I just installed an older AC sytem in my shop...it is a Bryant air handler and a Trane condensing unit. I am getting cofused on the low volatage wiring.
I understand that I need to send 24vac to the contactor on the comperssor, but now sure how that is done properly.
Do I take the Y wire going to the t-stat and connect it to the Y terminal on the air handler and also connect the yellow wired going to the compressor to the Y terminal. Then connect the other wire from the compressor to the R or Hot 24vac terminal...or to the common terminal. Just now sure how to complete the circuit. Thanks
|
|
Replies:
|
| cubstakeseries
| "Re(1):Wiring an old system" , posted Wed 4 Jun 10:53
The Y goes straight to the condenser. Whatever color you are using for common also goes to the condenser. Assuming this is a straight AC and not heatpump.
|
| cubstakeseries
| "Re(1):Wiring an old system" , posted Wed 4 Jun 10:51
|
| theduke03
| "Re(1):Wiring an old system" , posted Tue 3 Jun 22:03
You are correct about Y. The other wire is common(C). Connected to C at air handler.
"My dad was the most feared furnace fighter in Northern Indiana."
|
| | agood1
| "Re(2):Wiring an old system" , posted Wed 4 Jun 13:22
OK, so do I connect the yellow wire from the thermostat to the Y terminal on the air handler and the yellow wire from the condenser to the Y terminal on the air handler? Or do I just connect the Yellow wire from the thermostat directly to the yellow wire from the condenser?
|
| | theduke03
| "Re(3):Wiring an old system" , posted Wed 4 Jun 17:45
Yes, connect both Y's to Y on the air handler.
"My dad was the most feared furnace fighter in Northern Indiana."
|
| | agood1
| "Re(4):Wiring an old system" , posted Thu 5 Jun 08:56
I got it working, just had my colors crossed at the condenser. So all is working fine now. Thanks for all the help!
|
|
|
|  |
|
