3. When using a self-contained recovery device on a CFC, HCFC, or HFC system with an operating compressor, technicians must:

recover the refrigerant to 5 inches of mercury vacuum.
recover 80% of the nameplate charge
recover the refrigerant to both 4 inches of mercury vacuum and 80% of the nameplate charge.
either recover the refrigerant to 4 inches of mercury vacuum or 90% of the nameplate charge.

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