If you are looking for in-depth technical guidance, Nehemiah Hawkins' classic text, Maxims and Instructions for the Boiler Room , is highly recommended, as noted in the search results.
Always consult the specific boiler manufacturer’s manual for detailed operating and safety instructions, as outlined in Cleaver-Brooks' Guide. IV. Safety Considerations Boiler Room
Critical safety devices that prevent overpressure, protecting against explosions. If you are looking for in-depth technical guidance,