What safety control is designed to protect the chiller from freezing?

The chilled water flow switch is designed to protect the chiller from freezing by ensuring that there is an adequate flow of chilled water through the evaporator. If the flow of chilled water is insufficient, the temperature of the refrigerant can drop too low, leading to freezing within the chiller components. The flow switch monitors the water flow and can shut down the chiller if it detects that the flow is below a certain threshold, thereby preventing ice formation and damage to the chiller system.

This feature is essential in maintaining the operational integrity of the cooling system, ensuring that it functions correctly and safely even under varying load conditions, which could otherwise lead to a risk of freezing. Other options, while related to system safety, address different issues, such as refrigerant levels or pressure conditions, rather than directly monitoring the chilled water flow and preventing freezing.