Which type of burner operation control is responsible for initiating sequences based on steam demand?

The type of burner operation control responsible for initiating sequences based on steam demand is operating control. Operating control is designed to monitor the system's parameters, such as pressure or temperature, and adjust the burner operation accordingly to meet the current steam demand. This means it actively regulates the burner to ensure that the system operates efficiently and safely under varying load conditions.

In a boiler system, the operating control takes input from the system's needs, such as the demand for steam, and adjusts the burner’s output to match that demand. This dynamic adjustment is crucial for maintaining optimal performance and safety.

High limit control, while important, acts as a safety measure by shutting down the burner if the system exceeds predetermined limits, rather than initiating sequences based on demand. Emergency control is focused on acting under specific emergency conditions to ensure safety, rather than managing regular operational sequences. Feedwater control specifically regulates the amount of water entering the boiler to maintain appropriate levels and does not relate directly to the burner operations that respond to steam demand.