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

A refrigeration system is deemed leak-free if deep vacuum pressure maintains a steady level around 500 microns. At this level, the moisture and contaminants are effectively removed, allowing the system to reach optimal performance. A stable reading at this pressure indicates that the system has been properly evacuated and there are no significant leaks present.

Vacuum readings lower than 500 microns suggest that absolute pressure is low enough to prevent moisture accumulation, which is crucial for the longevity and efficiency of refrigerants within the system. If the reading fluctuates or doesn’t hold at 500 microns, it could indicate a potential leak or the presence of non-condensable gases, which could compromise the refrigerant's ability to function effectively, leading to higher operational costs or system failure.

Thus, 500 microns is the standard benchmark for determining the integrity of a refrigeration system regarding leaks.