What is the main combustion controller called?

The main combustion controller is known as the stack switch or primary control. This device plays a crucial role in managing the combustion process within an oil burner system. Its primary function is to regulate the fuel and air mixture to ensure efficient combustion, maintaining the appropriate conditions for safe and effective burner operation.

The stack switch monitors the flue gas temperature and pressure, ensuring that these parameters remain within safe limits. When the burner operates, the stack switch can activate or deactivate the burner based on the flue gas conditions, thus ensuring that the combustion process is optimized for performance and safety. This functionality is essential for preventing issues such as incomplete combustion, which can lead to dangerous situations like carbon monoxide buildup.

The other options refer to components that serve different functions within the heating system. For example, the flame sensor detects the presence of flame and ensures that the burner operates only when a flame is established. A heat exchanger is responsible for transferring heat from the combustion process to the heating medium, while a pressure relief valve prevents excessive pressure build-up within the system, protecting equipment from potential damage. Each component is important, but the stack switch or primary control is specifically designated as the main combustion controller.