Perform heating maintenance on x1 boilers unit. X1 WeilMcLain boiler unit. X2 AHUs Hydro air handler. X1 indirect tank. Boilers : shop power to boiler Removed boiler covered doors- system, full of dust and debris Vacuum and dusted out boiler cabinet and components, under heat exchanger, burner tubes, and piping Removed pilot assembly, and replaced the thermocouple. Clean pilot light with copper bristle brush, and polished clean with steel wool Reinstalled and secured all connections Test expansion tank, water feed, and backflow preventer, air vent, and relief valve- okay Secured and inspected electrical wiring and components Inspect flue piping- okay Polished and wiped down all equipment Return power to system Test take zoning panel, securing all connections- test Hydro. Thermostat- zone panel response, circulator pumps on and running and boiler fires Monitor system operations, flames, boiler pressure and temperature- normal Boiler satisfies at 180° Tested domestic, hot water, aquasta