SOURCE: I have a new 13 seer rheem 4 ton heat pump system
On a heat pump the difference from heat to cool is the reversing valve.
In cooling or heating the Y1 terminal will always be energized, this is the contactor.
Depending on brand the reversing valve will either be energized in Heat or Cool. At the outdoor unit check to see if the reversing valve is getting 24 volts in cool, if not check to see if it is getting 24 volts in heating. The easiest way to check if the reversing valve is shifting, is to feel the big copper tube, (it is not the suction line on a heat pump) this is a refrigerant vapor line. It will be cold in cooling and hot in heating.
Check your thermostat installation instructions and heat pump installation instructions to determine the proper terminal designations for your heat pump and thermostat. There are some brands out there that use the B terminal as common to the 24 volt circuit, so you have to check the wiring and make sure this is not common.
If it is energized in Cool then the Y1 and O terminal will be energized. You will have 24 volts from common usually the C terminal to Y1 and O.
If it’s energized in Heat then the Y1 and B terminal should be energized. You will have 24 volts from common usually the C terminal to Y1 and B.
If you get heat when you’re calling for cooling or vice versa then switch the wire between the B and O terminals.
SOURCE: Rheem Heat pump 5 ton heat strip 10KW what
I would say this is around 75 amps of draw at max for both the compressor and heat units. . Therefore--at least 90 amp breaker, and probably 100 amps for good measure, and at least #4 or #2 wire to the unit.
SOURCE: Trouble Wiring in Rheem heat pump
The red wire goes back to the furnace red, the blue back to the thermostat blue, the brown back to the furnace C terminal, the yellow back to thermostat Yellow (if there is a Y terminal on that furnace, land your Y's there. The purple wire outside comes back and ties to the W terminal on the furnace. Now you have a dual fuel unit so you will need a dual fuel kit or a thermostat that has dual fuel capability along with an outdoor sensor.
SOURCE: Replacing a Rheem Heat Pump
The difference is that the reversing valve is energized it heat mode for one brand and energized in the cooling mode for the other brand. An "O" on the circuit board indicates energized in cooling and a "B" on the circuit board indicates energized in heating.
SOURCE: im replaceing the fan moter
If the fan is running for few minutes then it stops then check the fan relay.If the fan relay is weak then this happens.Get the fan relay checked.
Thanks.Helpmech.
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