When performing active recovery and the compressor is working we must recover what levels?

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Multiple Choice

When performing active recovery and the compressor is working we must recover what levels?

Explanation:
During active recovery with the compressor running, you should continue until you’ve recovered 90% of the refrigerant in the system or until you reach a vacuum of 4 inches of mercury, whichever comes first. This rule ensures most of the refrigerant is removed efficiently while using a practical vacuum limit to avoid unnecessary over-evacuation. If you can’t reach 90% due to constraints, you stop at 4 inches of vacuum; if you hit 90% earlier, you can stop there even if you’re not yet at 4 inches. The other options don’t match the standard active-recovery requirement.

During active recovery with the compressor running, you should continue until you’ve recovered 90% of the refrigerant in the system or until you reach a vacuum of 4 inches of mercury, whichever comes first. This rule ensures most of the refrigerant is removed efficiently while using a practical vacuum limit to avoid unnecessary over-evacuation. If you can’t reach 90% due to constraints, you stop at 4 inches of vacuum; if you hit 90% earlier, you can stop there even if you’re not yet at 4 inches. The other options don’t match the standard active-recovery requirement.

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