What must be done before opening a vapor/compression system for service?

Before opening a vapor/compression system for service, the refrigerant must be recovered using approved equipment. This step is essential for several reasons.

Refrigerants can be harmful to the environment and human health if released into the atmosphere, which is why regulations mandate their proper handling. Utilizing approved recovery equipment ensures that the refrigerant is safely captured and prevents any accidental leakage. This procedure is not only a best practice but often a legal requirement in many jurisdictions. It also protects the technician by minimizing exposure to potentially hazardous substances.

In contrast, while releasing pressure from the system, checking the temperature, or rebuilding components may be aspects of service, they should only occur after the refrigerant has been properly recovered. In summary, recovering refrigerants before any service work is crucial for safety, compliance, and environmental protection.