Original message
| advlaser
 |  "Trane Rooftop - Looking for common"
, posted Mon 12 Jun 12:02  
I'm wiring up a thermostat to an 8 year old Trane rooftop unit. (Trane YCD060C3L0BE) 5 ton single stage heat/cool. Right now there are only 4 wires for the thermostat R,G,W,Y. I need a common. Unfortunately the terminals are labeled 1 - 20. I checked out the schematic and I'm lost. Anybody know which would be common? I need 24v AC. I guess I could just test with a volt meter, but I'd like to get the right one. I'm wiring up an AprilAire 8870 and it needs 24v for operation. I don't have it on a controller yet.
Thanks in Advance! -Marvin
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Replies:
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| hvac_dude
| "Re(1):Trane Rooftop - Looking for common" , posted Thu 15 Jun 18:30
And good luck on the price.... the last one I purchase came directly from trane.... 285 bucks
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| chiller guy
| "Re(1):Trane Rooftop - Looking for common" , posted Mon 12 Jun 14:28:
There is no common!
You have a unit that uses Trane electronic controls and needs a zone sensor in place of a T-stat. In order to use a conventional T-stat you will need a CTI (conventional thermoste interface) board. Local Trane parts house should have it.
Also, the signal to the sensor is 5 VDC not 24v.
All refrigerants are safe - All refrigerant are dangerous. The difference is YOU !!!
[this message was edited by chiller guy on Tue 13 Jun 08:21] |
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