What is the primary function of a chiller's flow switch?

The primary function of a chiller's flow switch is to protect against low flow conditions. This device monitors the flow of the coolant or refrigerant within the chiller system. If the flow falls below a certain threshold, it indicates that there may be a problem, such as a blockage, pump failure, or insufficient coolant. In response to low flow conditions, the flow switch typically initiates safety measures, such as shutting down the compressor to prevent potential damage from overheating or reduced efficiency.

Maintaining adequate flow is crucial for the optimal operation of a chiller, as insufficient flow can lead to inadequate heat exchange, causing the system to operate inefficiently or even overheat. Therefore, the flow switch plays a vital role in ensuring the reliability and longevity of the chiller system by continually monitoring the flow and acting to protect it from adverse conditions.