What occurs after a programmer proves the main flame?

After a programmer proves the main flame, the system transitions to automatic control. This is a crucial step in the operation of combustion systems, such as those used in boilers and other steam-generating equipment. Proving the main flame ensures that the combustion process is stable and safe before allowing the system to manage the burner automatically.

In automatic control, the system continuously monitors the flame and other critical parameters to maintain optimal performance and safety. If an issue arises, such as the flame going out, the automatic control system can react appropriately by shutting down the burner or taking corrective actions.

The other choices represent outcomes that might occur in different contexts but do not follow the proving of the flame. Manual burner operation typically happens prior to establishing flame proofing, and an alarm sounding indicates a fault or abnormal condition rather than a normal progression after proving the flame. The system shutting down is also an abnormal response that would follow a detected unsafe condition rather than a direct next step after proving the main flame.