Air Conditioning - wiring programmable thermostat
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tap8
01-31-06, 09:22 AM
I realize it is supposed to be as easy as just connecting the wires, but it's not working out that way for me.
I have a stock Honeywell that I am trying to replace with a Hunter 44550. It is for a condomium with a rooftop unit.
Of the two wires coming out of the way I have the following:
First Wire
White C
Green G
Red R
Second Wire
Blue C
Yellow Y (also jumped to W)
White B
When I connect these wires to the Hunter, the blower will come on, but no heat. If I jump the Y and W the blower turns on, but won't go off. I have switched the switch to "B" on the back of the unit, and left the jump in between RC and RH.
Any ideas?
I have a stock Honeywell that I am trying to replace with a Hunter 44550. It is for a condomium with a rooftop unit.
Of the two wires coming out of the way I have the following:
First Wire
White C
Green G
Red R
Second Wire
Blue C
Yellow Y (also jumped to W)
White B
When I connect these wires to the Hunter, the blower will come on, but no heat. If I jump the Y and W the blower turns on, but won't go off. I have switched the switch to "B" on the back of the unit, and left the jump in between RC and RH.
Any ideas?
Jay11J
01-31-06, 10:57 AM
is this a heat pump?
If yes, the t-stat must be made for heat pump.
If yes, the t-stat must be made for heat pump.
tap8
01-31-06, 11:53 AM
System has a "B" wire indicating heat pump.
Thermostat at least claims the capability to handle a heat pump (and I had to move a switch on the back to select that functionality).
Thermostat at least claims the capability to handle a heat pump (and I had to move a switch on the back to select that functionality).
Jay11J
01-31-06, 06:15 PM
First Wire
White C
Green G
Red R
Second Wire
Blue C
Yellow Y (also jumped to W)
White B
Ok, you got two wires going to C (Common)
Install manual says don't use W on heat pump.
Should not have a jumper between W and Y (W=gas heat, and Y=Cooling)
Go up to the air handler and make notes of what wire goes where.
What the model # of the heatpump? back up heat?
White C
Green G
Red R
Second Wire
Blue C
Yellow Y (also jumped to W)
White B
Ok, you got two wires going to C (Common)
Install manual says don't use W on heat pump.
Should not have a jumper between W and Y (W=gas heat, and Y=Cooling)
Go up to the air handler and make notes of what wire goes where.
What the model # of the heatpump? back up heat?
tap8
02-01-06, 11:23 AM
Should later in the week.
Hoping to get it working before then - as it has been a hassle getting the person with the key to the roof.
Hoping to get it working before then - as it has been a hassle getting the person with the key to the roof.
DNT1
02-07-06, 04:21 PM
best to check wiring at unit and match up properly to prevent equipment damage, there should be a diagram on the inside of the service panel check to see what is hooked up and double check the diagram. The following is fairly typical among most manufacturers R = red 24volts from transformer C = common ground Y = cooling W= heat G = blower B = reversing valve for heat pump W1 = auxilary heat sometimes a jumper will be required between either the heat and cool and the reversing valve but never between Y and W as that would turn on Compressor and Heat at the same time and probably fry the control board or damage the compressor we did not do that did we?