I am replacing a AC/Heat Pump with just a AC that has auxillary electric heating coils. On the OLD unit, I had 2 separate 220V circuit breakers, one feeding the AC and it was connected to the L1/L2 contactor. The second breaker was wired to 2 wires with ''twist wire connectors'' to some lines in the old unit. My question is this: Do I need to supply the heating section with a separate supply voltage? I thought the separate supply voltaage might only be necessary for a heat pump and also I cannot located ANY ''second'' supply voltage input on the schematic. To state the question more simply: On a AC only unit with aux heating coils (not a heat pump) do I need just ONE 220 Volt Supply? Thank you.
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Re: Goodman PC060-1B Package AC...Need Wiring Help
Depending on the size of your Electric heat you can use one set of wires because your unit does not run with the heat like the heat pump. The large set of wires going to the electric heat should be used. You may have to jumper a new set to the contactor. On Goodman unit come in L1 and L2 jumper to contactor. Very simple good luck. Rus
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what a heat pump is designed to do is reverse the evaporator inside coil and condensor outside coil. it trys to pick up heat from outside and transfer it inside. they work fairly well down to about 40 degrees ambient then not so good. that is why you have auxillary heat i.e. 15 kw. when it was shaking as you saw the compressor is trying to pump liquid instad of vapor as it's designed to. you either have a control issue or it's overcharged.
Put meter probes at in put terminal of the element if you read 220volts that mean your relay is good. if you got it there use amp meter on one leg of that element. You should read some amp draw there but if there is no amp draw it mean the element broke.
You can use the existing air handler for a heat pump condenser unit up to 3 tons. The line set, evap coil are fine for a heat pump. The electric heat strip issue can be another problem, you can put several different size strips in depending on what may be needed where you live, the power requirements will differ with each heat strip, for example a 5KW (5000 watt) heat strip requires a 2 pole 30 amp circuit for heat strip and air handler combination.
The brown wire on a Goodman is tipically for the emergency heat option on your heat pump. First thing I would check is making sure it is wited correctly. Verify your stat is heat pump capable. Many of the cheaper stats only work for ac or just a heat pump. Anything beyond that would be a more serious electrical problem and should be looked at by someone with the proper training and tools.
Sounds like the heat pump is not running. Check outside to see if the fan is spinning.
Try moving the thermostat to emergency heat and see if that gives you any heat. If it does, then you have heat until you can get a service technician to locate the problem with the heat pump. It could be a wide range if issues from bad thermostat to bad wiring to bad capacitor.
Most heat pumps have an auxillary heat. Many are electric auxillary heat with a heat strip in the air handler. A common malfunction is for the electric auxillary heat to operate when the heat pump is set on cool. To confirm this, locate the conductor that runs from the heat sequencer to the connection on the heat strip. You will see this on the top section of the air handler. Use the clamp on part of the amp meter over that wire. If the thermostat is set on cool and the heat strip is drawing amps, it means the heat is coming on while the heat pump is set on cool. There is usually one or two causes for this, either the sequencer is bad or there is low voltage wires usually behind the thermostat or in the air handler closet that are touching that shouldn't be touching.
If this is not the case, if its not a problem of where the heat is coming on with the air conditioner, it could be a case of the reversing valve malfunctioning. The way a heat pump works is it reverses the flow of the refridgerant. For instance, many heat pumps the reversing valve is activated in cool. That would mean that there is a low voltage circuit that activates the reversing valve when the heat pump is in cool. I'm not sure what model/brand your heat pump is, Goodman and Janitrol for instance, the heat pump reversing valve is activated in cool. In any case, if the reversing valve is not operating properly, when the air conditioning is set to cool it will actually be heating. Or you could set it to heat and it may actually be cooling instead of heating. Please check these two items first and if you have any further questions, please let me know. Especially if you know of any additional problems like the evaporater is icing up or if the air handler fan is not operating when it should.