Which component should not be left unattended when a water-cooled chiller is operating normally?

The cooling tower should not be left unattended while a water-cooled chiller is operating normally due to its critical role in the heat exchange process. The cooling tower is responsible for rejecting heat absorbed from the refrigerant in the chiller by dispersing it into the atmosphere. If the cooling tower becomes malfunctioning or if there are issues with water flow or treatment, it can lead to overheating of the chiller, potential system failure, or severe damage to components.

Moreover, cooling towers require constant monitoring for proper water levels, recirculation rates, and water quality to prevent issues such as scaling, biological growth, or insufficient cooling capability. These problems can significantly affect the performance of the entire cooling system.

While the evaporator, compressor, and condenser are also essential components that require oversight, the cooling tower's open design and direct exposure to ambient conditions make it particularly vulnerable to changes that could lead to operational inefficiencies or risks. Therefore, ensuring that it is monitored constantly during operation is vital for the health of the cooling system.