Using recovery equipment made after November 15, 1993, an appliance using CFC-12 and holding less than 200 pounds must be evacuated to:

Giải thích

For other high-pressure refrigerants such as CFC-12, post-1993 equipment must evacuate an appliance under 200 pounds to 10 inches of mercury vacuum, and 200 pounds or more to 15 in Hg. HCFC-22 has its own lower numbers, and 25 mm Hg absolute is for low-pressure. Memorizing the table by refrigerant and size is essential.