The recovery of refrigerant removes refrigerant in any condition o f purity from a system or container for storage in an approved external container (recovery cylinder). No processing is necessarily done on the recovered refrigerant. Currently, recovered refrigerant is only reusable if it does not change ownership from the owner of the equipment being serviced.
Recovery of refrigerant from a system is done using a certified recovery unit (Figure SP-2-1) or a combined recovery/recycle unit (Figure SP-2-2). Recovery must be performed:
• Before a refrigeration system can be opened to make repairs.
• Before pressurizing a system for leak testing with a mixture of HCFC-22 refrigerant and nitrogen.
• Before disposing of any system or component containing CFC or HCFC refrigerants.
• When it is necessary to remove excess charge from an overcharged system.