What condition is indicated by excessive running of the purge system on a low-pressure chiller?

Excessive running of the purge system on a low-pressure chiller is indicative of the system leaking. The purpose of the purge system is to remove non-condensable gases, such as air and moisture, from the refrigerant circuits. When there is a leak in the system, outside air can enter and mix with the refrigerant, leading to a higher concentration of non-condensables. As a result, the purge system activates more frequently to eliminate these gases, which is a sign that there is a breach in the refrigerant containment.

This condition is critical to address, as the presence of leaks can reduce the efficiency of the chiller, lead to further refrigerant loss, and possibly damage the compressor due to improper pressure and flow conditions. Identifying and repairing the leak is essential for maintaining the operational integrity and efficiency of the chiller system.