Continuous excessive moisture collection in which component of a low pressure refrigerant system could indicate a leak?

• A. Purge unit
• B. Receiver
• C. Condenser
• D. Evaporator

Answer: (A)

Moisture in a low-pressure refrigerant system is a sign that air and water vapor are entering the system, usually through a leak. The purge unit in a recovery/recycling setup is the component designed to remove and collect moisture from the refrigerant as it’s recovered. If you see continuous, excessive moisture gathering in the purge unit, it means fresh moisture-laden air is continually getting into the system—pointing to a leak somewhere upstream. The receiver simply stores liquid refrigerant, while the condenser and evaporator handle heat exchange; neither is the part where moisture buildup from a leak is actively collected during the purge process.