When a boiler equipped with a combination feedwater control and low water cutoff device shuts down due to a low water condition:

When a boiler equipped with a combination feedwater control and low water cutoff device experiences a shutdown due to a low water condition, it is essential to ensure that the water level is restored above the cutoff line before attempting to restart the boiler.

This requirement serves several safety and operational purposes. The low water cutoff is designed to prevent the boiler from operating in a low water condition, which can lead to overheating and potential damage to the boiler system. By requiring the water level to be brought back up to a safe point, it ensures that there is adequate water to absorb heat and prevent damage once the boiler is restarted.

Additionally, the boiler’s operational integrity relies on maintaining proper water levels for efficient heat exchange and to avoid hazardous conditions like dry firing. Restarting the boiler without sufficient water could result in severe damage to the components and can be a significant safety risk.

This answer highlights the importance of adhering to safety protocols and ensuring that water levels are within safe operating limits before attempting to reactivate the boiler system.