What must the primary control react to during operation?

The primary control in an oil burner system is designed to monitor the presence or absence of flame during operation. This function is crucial for safety, as it ensures that the burner operates only when there is a proper flame. If the flame goes out for any reason, such as fuel interruption, flame disturbance, or any malfunction, the primary control will react by shutting down the burner. This prevents the accumulation of unburned fuel, which could pose a serious risk of explosion or fire.

The presence or absence of flame is vital for efficient combustion and to confirm that the system is functioning safely. An effective primary control system will have sensors or detectors that continuously check for flame integrity, ensuring that the burner operates under safe conditions. This is fundamental for maintaining both efficiency and safety in oil burner operations.