Type I — Small AppliancesQuestion 102 of 240
A technician recovering from a small appliance notices the recovery cylinder is not pulling below atmospheric pressure. Which factor most likely prevents reaching the 4 inches Hg vacuum alternative?
a.The refrigerant is an HFC and cannot be recovered
b.Small appliances are exempt from vacuum requirements
c.A restriction, a closed valve, or a saturated cylinder is blocking full evacuation
d.The 4 inches Hg vacuum only applies to low-pressure chillers
Explanation
If a system will not pull into a vacuum, the usual causes are a restriction in the access path, a closed or partially opened valve, or a recovery cylinder that is full or at high pressure. The technician should check the connections, valves, and cylinder before assuming the appliance is empty. The 4 inches Hg vacuum is a valid recovery alternative for small appliances regardless of refrigerant type.
Law Reference: 40 CFR §82.156Practice all 240 questions free — no signup required.
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