Which safety feature automatically turns off an oil burner during a flame failure?

The safety feature that automatically turns off an oil burner during a flame failure is the safety lockout system. This system is designed to protect the burner and the surrounding environment from the risks associated with an unburned fuel buildup or potential fire hazards. When a flame failure occurs, the safety lockout system interrupts the fuel supply, ensuring that no oil is being fed into the combustion chamber without a flame present to ignite it. This is crucial for preventing accidents and maintaining safe operation.

While the flame sensor does detect the presence of a flame and can send signals to the burner control to ensure it remains operational, it does not disable the burner on its own in the event of a flame failure; rather, it works in tandem with the safety lockout system to ensure safe operations. The emergency stop switch is a manual control that can halt the operation of the burner but relies on human intervention rather than automatically responding to flame failure. The oil pressure regulator is responsible for maintaining consistent oil pressure but does not play a direct role in flame monitoring or safety shutdown in the event of a failure. The automatic action taken by the safety lockout system is pivotal for safe burner operation.