For a HCFC-22 appliance or isolated component normally containing less than 200 pounds of refrigerant, what is the required recovery level in inches of mercury after November 15, 1993?

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The test is checking understanding of how recovery requirements depend on the amount of refrigerant. For HCFC-22 appliances or components that normally hold less than 200 pounds of refrigerant, after November 15, 1993 the regulation does not require pulling a deep vacuum. A vacuum level of 0 inches of mercury means there is no mandated minimum vacuum to achieve—the recovery is considered complete when the refrigerant is removed to ambient pressure. In other words, small systems do not require the deeper vacuums needed for larger systems.