After recovering R-22 from a 100-pound system for a compressor change, what must the technician do before opening it?

Recovery requirements · EPA 608 Type II. The correct answer, and the reasoning behind it.

Evacuation levels by charge size and equipment date, major repairs, and system-dependent limits.

The question

After recovering R-22 from a 100-pound system for a compressor change, what must the technician do before opening it?

• AVerify the required evacuation level was reachedCorrect answer
• BAdd nitrogen to bring the pressure back above 0 psig
• CHave the owner sign a recovery record
• DWait 24 hours for the oil to settle

Why “Verify the required evacuation level was reached” is correct

Section 82.156(a) requires the technician to verify that the applicable evacuation level has been reached in the appliance or the part before it is opened. Watching the gauge for a few minutes after shutting off the machine is part of that check.

Source: 40 CFR 82.156(a)

Why the other answers are wrong

• Add nitrogen to bring the pressure back above 0 psig — Adding nitrogen is not required before opening a high-pressure appliance and would not confirm recovery.
• Have the owner sign a recovery record — No owner signature is required before opening the system.
• Wait 24 hours for the oil to settle — No waiting period of that kind exists in the rule.

Practice more of this

More EPA 608 Type II practice questions, or see every EPA 608 practice test.