Excessive moisture being collected in the purge unit of a low pressure refrigeration system could indicate which probable condition?

Correct Answer: Option B — leaking condenser or chiller tubes

Low-pressure chillers operate below atmospheric pressure, allowing ambient air and moisture to infiltrate through leaks. When condenser or chiller tubes develop pinhole leaks, high-pressure cooling water enters the refrigerant side, introducing excessive moisture that eventually accumulates in the purge unit's separation chamber during normal operation.