Question about Heating & Cooling
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Posted on Jan 02, 2017
SOURCE: need wiring help for replacing
I am not sure of what help you need on it but here are the most common wiring on a stat
RC=Hot (24v for Cooling)
RH= Hot (24v for Heat)
O= Reversing Valve (Heat Pumps Only)
Hope this helps
Posted on May 11, 2008
this link has a good diagram of the wiring. It should help you.
Posted on Nov 05, 2009
For Trane sytems, B is your "Common" wire. O is your reversing valve relay, G is your fan, Y is your compressor contactor, R is Hot, Brown will not be used on your electronic tstat. X2 is your backup electric heaters. Without knowing what terminals are on your new tstat, I cannot offer more information than this. The installation manual may indicate what each terminal is controlling. I strongly suggest to write down ALL of the terminals and colors from your old t-stat and be sure to turn off the power to your air handler. Put the fan switch on your tstat to ON before turning off the power. Make sure the fan is running. Then turn the power off to your Air Handler. If your fan stops running, you have turned the power off to your tstat and are ready to start replacing it with your new tstat. I hope you find this helpful. Good Luck!!!
Posted on Feb 07, 2010
SOURCE: trane weathertron thermosatat
OK. Here is a Trane Weathertron BAYSTAT240 thermostat wiring picture. This heat pump w/ electric (emergency) heaters is running right now. Notice the G terminal has green wire, the R terminal has red wire, the white wire is jumpered from W to X2, etc. The black wire loop you see in the center hole is unconnected.
This unit is adjusted by leveling the base - loosen the screw to the left of "R" and the one to the right of "F". Twist the base clockwise to RAISE the indicator. This makes the mercury in the switch turn ON at a different temperature. Remember to tighten those 2 screws again.
You will have to experiment several times to make the unit read exactly right. If the tech installed the base exactly level, the unit would read right (it says here).
Posted on Jun 10, 2011
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