After refrigerant liquid has been recovered from the appliance, what should be done with any remaining vapor?

The correct action after refrigerant liquid has been recovered from an appliance is to remove any remaining vapor using a recovery system. This practice is essential for the following reasons:

1. Environmental Protection: Many refrigerants can contribute to ozone depletion and global warming if released into the atmosphere. By utilizing a recovery system, technicians ensure that all refrigerant, including vapor, is contained and managed properly, preventing any harmful environmental impact.

2. Regulatory Compliance: Regulations under the EPA require the recovery of refrigerants rather than venting them. This is in line with the Clean Air Act, which prohibits the release of refrigerants into the environment. Following proper recovery procedures helps technicians avoid potential legal penalties and promotes responsible practices.

3. System Integrity: Leaving refrigerant vapor in the appliance could lead to potential issues if the system is serviced or recharged later. Ensuring that all refrigerant is properly recovered helps maintain clear documentation of the refrigerant used and supports safe future operations.

In contrast, venting refrigerant to the atmosphere would be harmful and illegal, and leaving vapor in the appliance is not ideal for future servicing or environmental standards. Storing it in a separate cylinder may also not be appropriate without proper recovery protocols in place. Thus