HVAC NATE Heat Pump Exam (Latest 2024/ 2025 Update) 100% Correct Questions and Verified Answers| Grade A What is the purpose of the reversing valve on an air-to-air heat pump: - ANSWER It changes the flow of the refrigerant, making the indoor coil the condenser during the winter months On a reversing-valve solenoid, what is connected to the top tube: - ANSWER the compressor discharge line On a reversing-valve solenoid, what is connected to the bottom center tube: - ANSWER the compressor suction line What pressure difference must be between the low side and the high side of the heat pump system for the reversing valve to operate properly: - ANSWER 75 psig
Where are the check valves located on an air-to-air heat pump: - ANSWER
on the outdoor coil and indoor coil 1 / 2
How are the check valves connected in a heat pump system: - ANSWER in parallel with both metering devices+in series with one metering device and parallel with the other A ball-type check valve must be installed: - ANSWER vertically, with the seat on the bottom of the valve When installing a ball-type check valve, what must be done to prevent warping: - ANSWER A heat sink must be used when brazing it into the line
Where is the accumulator located on a heat pump system: - ANSWER
between the bottom center tube of the reversing valve and the compressor When would you most likely find liquid in the vapor line on a heat pump: - ANSWER during the heating mode after a defrost
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