What defines an interrupted pilot of an automatic boiler?

An interrupted pilot in an automatic boiler is defined as a system that ignites initially to establish the main flame, proves that the main flame is stable, and then extinguishes once that stability is confirmed. This method enhances safety by ensuring that the main flame is sufficiently established before the pilot flame is turned off.

The operation involves the pilot igniting at the start of the boiler's firing cycle. Once the main burner lights and the flame is stable, the control system can safely shut off the pilot flame to conserve gas and reduce the risk of overheating or other hazards associated with a continuously burning pilot. This design is efficient and minimizes fuel usage while maintaining operational safety.

In contrast, other pilot operations may involve continuous burning or manual control, but these do not reflect the interrupted nature of the pilot discussed in this context. Continuous burning pilots would add unnecessary fuel use, while manual controls would not align with the automatic operation characteristic of modern boiler systems.