What type of recovery system can remove refrigerant without relying on appliance components?

A self-contained recovery system is designed to extract refrigerant independently of the components within the appliance. This type of system has its own compressor and is capable of removing refrigerant from the system without needing the appliance's existing components, such as the compressor or evaporator, to function. It operates in a standalone manner, which means technicians can use it to recover refrigerant even when the appliance is non-operational or when the appliance's components are not suitable for recovery.

This is particularly advantageous in situations where a system is broken or under repair, as it allows for effective refrigerant recovery without reliance on the integrity of the appliance. The design ensures that all gas is removed safely and efficiently, aligning with environmental regulations aimed at reducing the release of refrigerants into the atmosphere.

In contrast, system-dependent recovery relies on the operation of the system's components to assist with the recovery of refrigerant, which might not be feasible if those components are not functioning correctly. Passive and active recovery methods also differ in their reliance on system components, with active recovery typically involving a powered device that aids in the recovery process while still being dependent on the appliance for some functionality.