The programmed startup sequence of oil-fired boilers with no pilot light begins with:

The programmed startup sequence of oil-fired boilers that do not use a pilot light indeed begins with the operating control closing a switch. This action signifies the initial step in the ignition process, where the control system signals the necessary components to prepare for operation. Once this switch is closed, it sets off a chain reaction of events in the system, such as energizing the burner motor and activating safety devices.

In the context of a startup sequence, the operating control is essential as it orchestrates all subsequent actions, ensuring safety and proper functioning of the boiler. The closing of the switch typically engages the ignition components and allows for the sequence to move forward to fuel delivery and ignition.

Understanding this sequence is crucial in power engineering since it addresses safety protocols and operational efficiency, ensuring boilers function correctly and efficiently while minimizing potential hazards.