Why must water be circulated through a chiller during refrigerant evacuation?

• A. To cool the refrigerant quickly
• B. To lubricate mechanical parts
• C. To prevent freezing of water in the appliance
• D. To reduce energy consumption

Answer: (C)

During refrigerant evacuation, the refrigerant in the system can become extremely cold as pressure is reduced. If the water in the chiller’s circulating loop sits still, that cold surface can freeze the water inside the unit. Circulating water moves heat away from the cold surfaces and keeps the water above freezing, preventing ice from forming and protecting the system from blockages or damage while the refrigerant is removed. This isn’t about cooling the refrigerant quickly, lubricating parts, or saving energy; it’s about preventing ice formation in the water circuit during the evacuation process.