Final answer:
A flame safety control is a combustion controller used to automatically shut down a boiler when no flame is detected.
Step-by-step explanation:
A flame safety control is a combustion controller used to automatically shut down a boiler when no flame is detected. It is a critical safety device that helps prevent accidents and protect the boiler from damage. The control uses sensors to monitor the presence of a flame and if no flame is detected, it initiates a shutdown sequence to safely stop the boiler operation.