In a Refrigeration system, the operation by which the refrigerant in a charged system is pumped into the liquid receiver.

To use the compressor to pump all of the system's refrigerant into the receiver and/or condenser prior to opening the system for service. This is also used in commercial systems to prevent refrigerant migration in the off cycle.

The act of using a compressor or a pump to reduce the pressure in a container or a system.

Is the process of preventing a refrigerant from a escape