What type of control should be present for coil-type boilers requiring forced circulation?

Coil-type boilers requiring forced circulation need a flow-sensing control to ensure proper operation and safety. This type of control monitors the flow of water through the boiler system. In forced circulation systems, maintaining a consistent and adequate flow is crucial for effective heat transfer and to prevent overheating. If the flow drops below a certain threshold, it can lead to situations where the boiler could experience unsafe temperatures or pressures, which can result in damage or failure.

Flow-sensing controls act as a safeguard by automatically shutting down or limiting the operation of the boiler if insufficient water flow is detected. This adds a vital layer of safety and efficiency, as the control mechanism can also be programmed to alert operators of flow issues, allowing for timely intervention before any hazardous conditions develop.

While temperature control, pressure relief control, and manual override control are important in different contexts, they do not specifically address the unique needs of forced circulation in coil-type boilers as effectively as flow-sensing controls do. Thus, the inclusion of a flow-sensing control is a critical requirement for the safe and efficient operation of these boilers.