What is the purpose of the purge unit in a chiller?

The purpose of the purge unit in a chiller is to expel non-condensable gases from the system. Non-condensable gases, such as air or moisture, can accumulate in the refrigeration system and interfere with the efficient operation of the chiller. By removing these gases, the purge unit helps maintain the purity of the refrigerant charge, which in turn ensures optimal performance and energy efficiency. Keeping the system free of non-condensable gases prevents issues such as reduced cooling capacity, higher energy consumption, and potential damage to system components. This function is critical for maintaining the reliability and longevity of the chiller system.