For systems containing more than how many pounds of any kind of refrigerant is a dated and signed declaration of the pressure test required?

In refrigeration systems, a dated and signed declaration of the pressure test is required for systems containing more than 50 pounds of any kind of refrigerant. This requirement is part of regulations designed to ensure safety and environmental protection when handling refrigerants, which can be hazardous if leaks occur.

The pressure testing process allows technicians to verify the integrity of the system, ensuring that there are no leaks and that the components can handle the operational pressures without failure. When systems exceed the threshold of 50 pounds, the associated risks increase significantly, thus the requirement for a formal declaration which serves as a safeguard for both the technicians working on the system and the environment. This rule is specifically detailed in industry regulations to promote best practices in refrigeration installations and maintenance.