Type III — Low-PressureQuestion 191 of 240
The main reason a torch must never be used to warm a low-pressure chiller during recovery is that:
a.It wastes propane
b.Flame makes toxic gases
c.It has no effect on recovery speed
d.It cools the refrigerant too fast
Explanation
An open flame can break refrigerant down into toxic gases such as phosgene and hydrogen chloride, and localized heating can raise pressure dangerously and cause burns. Warm water or built-in heaters are the safe way to add heat. This is why torches are prohibited for warming the shell.
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Related questions on this topic
- Low-loss fittings on recovery hoses are important on low-pressure work because they:
- Which refrigerant is a CFC once widely used in low-pressure chillers and now available only as reclaimed stock?
- A machine room housing a low-pressure chiller should have a refrigerant monitor and ventilation mainly to protect against:
- In a low-pressure chiller, the evaporator normally operates:
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