Check out the introduction manual on steam boilers below.
This manual contains great content, with general provisions on generation and heating.
See Some Topics:
-Thermal performance test
-Operation of steam generators.
-Steam boiler inspection
-Security measures
-NR-13 boilers and pressure vessels
-Steam boilers general provisions
-Installation of steam boilers
-Boiler Safety Inspection
-Characteristics and treatment of water-Steam generating systems-Usual problems in steam generators-Care for high-pressure generators
-Boiler Protection
-Analytical controls
-Combustion
-Combustion reactions and stoichiometry
-Calorific power
-Combustion Stoichiometry
-excess air
-Combustion Models