What causes the activation of the purge cycle?

The activation of the purge cycle is associated with ignition failure. This occurs when the burner fails to ignite properly, which can happen for various reasons, such as issues with the ignition system, fuel supply problems, or environmental factors. The purge cycle is designed to clear any unburned fuel from the combustion chamber before attempting to ignite again. This helps prevent the build-up of potentially hazardous gases and ensures a safe operating environment when the system retries ignition.

Understanding the significance of the purge cycle is crucial for maintaining safe and efficient boiler operation. If ignition failure is detected, the purge cycle ensures that the risk of an explosion or dangerous fume accumulation is minimized by expelling unburned fuel and ensuring fresh air is available for combustion. This highlights the importance of the purge cycle as a safety mechanism in low-pressure boiler systems.