An air conditioning system should be pumped down (evacuated)for a minimum of ____ minutes.
A) 10
B) 20
C) 30
D) 60

Question

Quizplus · Accepted Answer

An air conditioning system should be evacuated for a minimum of 30 minutes to ensure that all moisture and non-condensable gases have been removed from the system. This is necessary to ensure efficient and reliable operation of the system. Shorter evacuation times may leave some moisture and non-condensable gases in the system, which can lead to problems such as corrosion, refrigerant contamination, and reduced system performance.

An Air Conditioning System Should Be Pumped Down (Evacuated)for a Minimum