How may positive pressure testing of a new refrigeration system be performed?

Positive pressure testing of a new refrigeration system is effectively performed by filling the system with an inert gas and conducting a soap bubble test. This method is widely accepted in the industry as it allows for a clear and non-destructive way to check for leaks.

When an inert gas, such as nitrogen, is used, it remains stable and does not react with the materials of the refrigeration system, making it an ideal choice for pressure testing. The soap bubble test involves applying a soap solution to the joints and connections of the system. If there are any leaks present, bubbles will form at the leak points, clearly indicating where the issue is, which can then be addressed.

This testing method is crucial as it helps ensure the integrity of the refrigeration system before it is put into operation, preventing potential leaks that could lead to environmental harm and decreased efficiency. Other methods listed may not provide the same level of safety, reliability, or effectiveness in identifying leaks.