A refrigeration system is considered leak-free if deep vacuum pressure holds steady around _________.

A refrigeration system is considered leak-free if it can maintain a deep vacuum pressure that remains stable around 500 microns. This level of vacuum indicates that there are no significant leaks in the system, as a leak would typically allow atmospheric pressure or moisture to enter, causing the vacuum pressure to rise.

Maintaining a deep vacuum at 500 microns suggests that the system has reached an adequate level of evacuation, removing most moisture and contaminants, which is crucial for optimal operation. In refrigeration and HVAC applications, achieving a stable vacuum at this measurement is a standard benchmark to ensure that the system is sealed properly and ready for refrigerant charging without the risk of introducing air or moisture, which can damage the system's components and efficiency.