How does moisture most frequently enter the refrigerant system on low pressure chillers?

Moisture most frequently enters the refrigerant system on low pressure chillers primarily through air leaks in gasketed areas or fittings. This occurs because low-pressure systems are sensitive to small leaks, and to maintain optimal performance, it's crucial to ensure that the system is airtight.

When air enters the system, it can carry moisture along with it. This moisture poses a significant risk as it can lead to corrosion, freezing in the expansion valve, and overall system inefficiency. Proper sealing and regular maintenance are essential to minimize this risk and maintain the integrity of the refrigerant system.

While condensation during operation can contribute to moisture buildup, it is not the primary source of water ingress. The charging process, if done correctly with dehydrated refrigerants, should not introduce moisture. Likewise, refrigerants that are moisture-laden can certainly introduce water vapor into the system, but this scenario is less common compared to moisture entering through system leaks. Thus, focusing on preventing air leaks in connections and gaskets is crucial for maintaining a low pressure chiller's health and functionality.