What evacuation level does Table 1 require?

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

An older R-12 system with an 80-pound charge is being opened to replace its condenser. The recovery unit was manufactured in 1989. What evacuation level does Table 1 require?

• A4 inches of Hg vacuumCorrect answer
• B10 inches of Hg vacuum
• C0 inches of Hg vacuum
• D15 inches of Hg vacuum

Why “4 inches of Hg vacuum” is correct

R-12 is a medium-pressure refrigerant. With recovery equipment made before November 15, 1993, every medium-pressure row in Table 1 is 4 inches of Hg vacuum, regardless of charge size.

Source: 40 CFR 82.156(a), Table 1; 40 CFR 82.152

Why the other answers are wrong

• 10 inches of Hg vacuum — 10 inches is the requirement for a medium-pressure appliance under 200 pounds with newer equipment.
• 0 inches of Hg vacuum — 0 inches is for very high-pressure and small high-pressure appliances, not medium-pressure.
• 15 inches of Hg vacuum — 15 inches is for medium-pressure appliances of 200 pounds or more with newer equipment.

Practice more of this

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