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1 day ago · Most residential and small commercial installations use a 12-volt control system. The temperature difference between the opening of the thermostat and the time when the warm air is no longer delivered to the room is called ___________________. The difference between a line voltage and a low-voltage thermostat is in the size of the bimetal element.
1 day ago · The crankcase heater protects the compressor on startup by: Vaporizing any liquid refrigerant that may enter the compressor during the OFF-cycle. The emergency heat setting on a heat pump thermostat: Energizes the auxiliary heat on first stage and does not turn on the compressor and outdoor fan.
