NATE ICE Heat Pump Test Questions with 100% Complete Answers, A+

Which of the following shuts off when the heat pump is in defrost mode? - Correct Solution outdoor fan With the system operating in the heating mode, only high pressure superheated vapor will be present between which of the following points? - Correct Solution 13 and 8 On an all-electric heat pump system with a single-stage compressor, the thermostat second-stage heating contacts serve to: - Correct Solution energize the auxiliary heaters along with the compressor. Temperature checks at the connections of the reversing valve will indicate: - Correct Solution reversing valve leakage. Using the diagram above, if a heat pump compressor fails and requires clean-up, a suction line filter-drier should be temporarily installed: - Correct Solution between 14 and 15. Using the diagram above, if this unit is installed on 208 volts, the transformer primary should be wired: - Correct Solution to the black and red leads of the transformer What happens to the outdoor fan when the heat pump goes into a defrost cycle? - Correct Solution it is de-energized When a heat pump is in the cooling mode of operation, the check valve at the indoor coil is: - Correct Solution closed Which of the following components is unique to heat pumps? - Correct Solution reversing valve A correct statement regarding the outdoor coil of a heat pump is that damage may result if the: - Correct Solution defrost water does not drain from the coil. A dirty air filter in a heat pump operating in the heating mode could result in: - Correct Solution excessive head pressure. A dirty air filter on a heat pump system will result in: - Correct Solution high head pressure in the heat mode and low suction pressure in the cool mode.