What happens when the chilled water temperature rises about 5 to 6°C above the set point after a low water temperature stop?

When the chilled water temperature rises by 5 to 6°C above the set point after a low water temperature stop, the compressor is designed to restart in order to bring the temperature back down to the desired level. This is part of a chiller system's control strategy aimed at maintaining efficient operation and ensuring that the cooling load is adequately met.

The low water temperature stop serves as a protective measure to prevent potential damage to the system due to excessively low water temperatures. Once the water heat increases beyond the set point threshold, it signals the need for cooling, prompting the compressor to engage again and restore the intended chilled water temperature.

The other responses involve scenarios that do not typically lead to compressor activation under these circumstances. The chiller will not remain off, as the system must respond to temperature changes to maintain performance. The low pressure switch is a safety feature that prevents compressor operation if the refrigerant pressure drops too low, which is unrelated to chilled water temperature rise. Likewise, flow switches monitor water flow, but they do not dictate the compressor's operation in this context.