What is the most common cause of burner puff-back related to ignition?

The most common cause of burner puff-back related to ignition is a delay in the ignition process. When the burner fails to ignite promptly after the fuel is introduced, unburned oil accumulates in the combustion chamber. This accumulation creates a potentially hazardous situation where the vaporized oil can ignite suddenly, resulting in a puff-back.

This phenomenon is dangerous not only because of the immediate explosion risk but also due to the potential for damage to the burner and surrounding components. Proper ignition timing is crucial in ensuring that fuel is burned efficiently and safely. Addressing issues that prolong ignition can significantly reduce the risk of puff-back incidents.

While the other factors listed can contribute to burner efficiency or safety, they are not as directly linked to the timing of ignition as the delay is. Insulation failure may lead to heat loss or improper combustion conditions, inadequate ventilation can lead to air-fuel mixture problems, and fuel miscalculation typically relates to the quantity of fuel used rather than the ignition timing itself.