When pumping down a residential central air conditioning system, which valve should be front seated?
A) liquid line
B) discharge line
C) suction line
D) all of the above

Question

Quizplus · Accepted Answer

Front seating the liquid line valve is correct when pumping down a residential central air conditioning system, as it isolates the outdoor unit from the rest of the system, allowing the refrigerant to be pumped into the condenser and receiver (if present).

When Pumping Down a Residential Central Air Conditioning System, Which