Question about Heating & Cooling
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Posted on Jan 02, 2017
SOURCE: Changing Thermostats
This is one where you will need a good control man or woman. The American Standard ASYST system is not intended for the homeowner to change out. It has a room sensor wire that others do not account for.
Posted on Jan 16, 2008
I don't know if this will be helpful or not, but I just installed a new Honeywell and the Honeywell customer service guy helped me get the wires done correctly. The number is 800-468-1502.
Posted on Jan 05, 2009
What was the old thermostat labels and the wire colors that went to them?
The typical heatpump wiring Terminals are:
R = Red = Hot side of Transformer
C-B-X = Common side of transformer Depending on brand of heatpump
Y = Yellow = Cooling Contactor
G = Green = Furnace Blower
O = Orange Reversing Valve Energize to Cool
B = Blue Reversing Energise to Heat Depending on brand of heatpump.
W2 = White = Auxiliary Heat
You need to be sure where each wire comes from when you connect them to the new thermostat.
The best way to do that is to go to the furnace and see where they are connected. R-Y-G are probably correct, you need to see where the Blue wire comes from and determine what the X terminal was on the old thermostat.
Posted on Dec 29, 2009
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