Question

After installation of a field-piped R-410A split heat pump, the unit should first be:

a) evacuated
b) pressurized with R-22 then leak checked
c) pressurized with R-410A then leak checked
d) pressurized with nitrogen then leak checked

Answer 1

After installation of a field-piped R-410A split heat pump, the unit should first be evacuated to remove air and moisture, and then pressurized with R-410A refrigerant. It is also important to check for any leaks.

Step-by-step explanation:

After installation of a field-piped R-410A split heat pump, the unit should first be evacuated to remove any air and moisture from the system. This is important to ensure proper functioning and efficiency of the heat pump. After evacuation, the system should be pressurized with R-410A refrigerant and then checked for any leaks. Nitrogen is commonly used to pressurize the system during leak checks, as it is inert and does not react with the refrigerant.