Type I — Small AppliancesQuestion 90 of 240
A technician wants to speed up refrigerant recovery from a chest freezer by heating the compressor with a torch and rapping the tubing with a hammer. Which statement is correct?
a.Gently warming the compressor and lightly tapping components can help move refrigerant, but an open flame that could burn oil or damage the system is unsafe and improper
b.Any amount of direct torch flame on the compressor is required to meet recovery levels
c.Recovery speed cannot be improved by any technique on a small appliance
d.The freezer must be inverted and dropped to release trapped refrigerant
Explanation
Mild warmth (for example a heat gun or warm water) raises refrigerant pressure and helps liquid migrate, and light tapping can free trapped charge, improving recovery from a small appliance. However, a direct open flame on the compressor can overheat oil, damage the system, and create hazards, so it is not proper practice. Techniques should speed recovery without endangering the technician or breaking down the oil.
Law Reference: 40 CFR §82.156Practice all 240 questions free — no signup required.
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