What type of ignition stays on while the burner is running?

The type of ignition that remains active while the burner is running is known as "intermittent duty." This type of ignition system is designed to provide a constant spark throughout the entire operation of the burner. In this system, the ignition source does not turn off after the burner lights but remains engaged to ensure that the flame stays lit during the operation. This is particularly useful in systems where stability of the flame is crucial, ensuring that any fluctuations or disturbances do not extinguish the flame.

In contrast, other ignition types may either operate only at startup or be turned on and off based on specific conditions. Continuous duty systems would provide ongoing ignition but typically refer to ignitions that might not be suited for all operational scenarios or might be focused on other applications. Interrupted duty systems provide a spark only during the ignition process and shut off once the flame is established, while standard duty does not specifically indicate continuous operation.

This understanding of ignition types is essential for safely and efficiently managing fuel-burning appliances, particularly in the context of maintaining consistent flame due to varying environmental conditions or changes in fuel quality.