What does a high-limit control do in boiler operations?

A high-limit control is an important safety feature in boiler operations. Its primary function is to monitor the water temperature within the boiler and ensure it does not exceed a designated maximum temperature set for safe operation. If the water temperature surpasses this preset limit, the high-limit control system will automatically shut off the burner. This action is crucial to prevent overheating, which could lead to dangerous conditions such as boiler failure or even explosions.

While other controls in boiler systems manage different aspects, such as regulating burner operation or monitoring water levels, the specific role of the high-limit control is to act as a protective measure, ensuring safety by terminating the burning process if temperatures become too high. Hence, the high-limit control is a vital component in maintaining safe and efficient boiler operation.