What device is primarily used to control the ignition of the oil burner?

The primary control or ignition relay is crucial for the ignition of an oil burner because it manages the sequence of operations necessary for starting the burner. This device ensures that the burner operates safely and efficiently by controlling the electrical current to the ignition transformer, which generates the spark needed to ignite the oil. It also monitors the various operational parameters and can shut down the burner if any unsafe conditions arise, providing an essential safety feature during the ignition process.

In addition to controlling ignition, this device often incorporates features such as a timing sequence for safely activating the oil pump and the ignition process, helping to prevent the accumulation of unburned oil. Its role is fundamental in ensuring the burner operates within the designed specifications for performance and safety.