Why is the presence of moisture in a refrigeration system harmful?

The presence of moisture in a refrigeration system is harmful primarily because it leads to acid formation and corrosion. When moisture enters the system, particularly when there are refrigerants such as R-22, it can react with the refrigerant and oil, resulting in the creation of acids. These acids can damage the internal components of the refrigeration system, such as the compressor, evaporator, and other metal parts, leading to corrosion.

Corrosion deteriorates metal surfaces, which can ultimately result in leaks and system failure. This problem is particularly significant in older systems that may already have structural vulnerabilities. Therefore, keeping moisture out of the refrigeration system is critical to ensuring its longevity and reliable operation. Proper maintenance, including ensuring airtight seals and using proper evacuation techniques during service, is essential to prevent moisture ingress.