When starting the recovery process for R-11 or R-123, which method is typically employed first?

When initiating the recovery process for refrigerants like R-11 or R-123, the typical method employed first is liquid removal followed by vapor recovery. This approach is effective because liquid refrigerants can be more easily collected and removed from the system due to their higher density compared to vapor.

Starting with liquid removal ensures that the majority of the refrigerant is recovered quickly, which can also help mitigate any potential pressure buildup within the system. This method also takes advantage of the liquid refrigerant’s ability to flow into the recovery vessel under gravity, allowing for a more efficient and faster recovery operation. Once the liquid phase is mostly removed, switching to vapor recovery helps to capture any remaining refrigerant in its gaseous form.

By understanding the recovery sequence, technicians can ensure compliance with regulatory requirements and contribute to environmentally responsible practices in the handling of refrigerants.