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High-pressure appliance with 200 lb or more, post-1993 recovery equipment. Evacuate to how many inches of mercury vacuum?

10 inches of mercury vacuum.

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  1. 0 inches
  2. 15 inches
  3. 10 inches ✔

Why: Larger high-pressure systems, 200 pounds or more, need a deeper pull of 10 inches of mercury vacuum with post-1993 equipment. Under 200 pounds, the target is 0 inches.

Huh, didn't know that: With recovery equipment made before November 15, 1993, the level for these large high-pressure systems is only 4 inches.

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References

Answer: 10 inches. Larger high-pressure systems, 200 pounds or more, need a deeper pull of 10 inches of mercury vacuum with post-1993 equipment. Under 200 pounds, the target is 0 inches.

  1. 40 CFR 82.156 Required practices (Cornell LII) www.law.cornell.edu/cfr/text/40/82.156
    High-pressure appliance, or isolated component of such appliance, with a full charge of 200 pounds or more of refrigerant 4 10.
    Checked 2026-10-10.
  2. 40 CFR 82.156 Required practices (Cornell LII) www.law.cornell.edu/cfr/text/40/82.156
    with a full charge of 200 pounds or more of refrigerant 4 15.
    Checked 2026-10-10.

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Trades & ShopOpening a high-pressure appliance with under 200 lb, using post-1993 equipment. Evacuate to how many inches of mercury vacuum?Trades & ShopInstead of recovering a percentage, a technician can evacuate a small appliance to what vacuum?Trades & ShopMedium-pressure appliance under 200 lb, recovery equipment made after November 15, 1993. Evacuate to how many inches of mercury vacuum?

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