What controls the primary air to a burner?

The control of primary air to a burner is achieved through air shutters located at the end of the venturi. The venturi effect creates a vacuum that draws in air and mixes it with the gas before combustion. By adjusting the air shutters, the technician can modify the airflow entering the burner, which is essential for achieving the correct air-to-fuel ratio. This ratio is crucial for efficient combustion, optimal heat output, and to minimize emissions.

Proper adjustment of the air shutters helps ensure that the burner operates at peak efficiency, providing adequate combustion while preventing issues such as sooting or improper flame characteristics. This is especially important in commercial cooking applications where performance and safety are paramount.

The other options serve different functions within the system. The gas pressure regulator manages gas pressure coming into the burner, while the burner manifold distributes the gas to the burner ports. A flame sensor monitors the presence of a flame but does not control air intake. Each component plays a vital role, but in the context of controlling primary air, the air shutters are the specific mechanism responsible for adjusting the amount of air available for combustion.