What should be done when installing an access fitting onto a sealed system?

When installing an access fitting onto a sealed system, it is essential to perform a leak test before proceeding with recovery. This is crucial because any new fitting or modification made to a refrigerant system can introduce potential leak points. A leak test ensures that the fitting has been installed correctly and that no refrigerant will escape from the system, maintaining the integrity of the system and preventing environmental harm. By verifying the seal at the fitting, technicians can confirm that the refrigerant remains contained, which is vital for compliance with environmental regulations and for the system's performance.

Conducting a leak test immediately after installation helps to identify and rectify any leaks before the recovery process begins, ensuring safe operation and preventing unnecessary loss of refrigerant. This practice aligns with industry standards and best practices for HVAC maintenance and repair, emphasizing the importance of thorough testing in maintaining system efficiency and safety.