Type III — Low-PressureQuestion 197 of 240
A high-efficiency purge unit on a chiller is often equipped with a purge-rate log because a rising rate:
a.Shows the refrigerant is too cold
b.Means the chiller is running more efficiently
c.Confirms the rupture disk is working
d.Indicates a growing leak that needs repair
Explanation
Tracking the purge rate turns the purge unit into a leak-detection tool; a climbing rate signals that more air is entering the vacuum side, so the leak should be located and repaired. Ignoring it wastes refrigerant and energy. Modern purge controls log and alarm on excessive purging.
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Related questions on this topic
- Which of the following is NOT a low-pressure appliance refrigerant?
- Excessive water in a low-pressure chiller can freeze and rupture tubes because low-pressure refrigerants:
- When handling a large recovery cylinder of R-11 removed from a chiller, the technician must remember to:
- The deep 25 mm Hg absolute recovery requirement exists for low-pressure appliances because:
- Which practice is correct when leak testing a low-pressure chiller that is under a vacuum?
- The main safety concern that sets the 10 psig pressurization limit on low-pressure appliances is:
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