The contractor performing the tune-up needs to check off the tasks performed, as applicable. •Measure combustion efficiency using an electronic flue gas analyzer. •Adjust airflow and reduce excessive stack temperatures. •Adjust burner and gas input, manual or motorized draft control. •Check for proper venting. •Complete visual inspection of system piping and insulation. •Check safety controls. •Check adequacy of combustion air intake. •Clean fireside surfaces. •Inspect all refractory. Patch and wash coat as required. •Inspect gaskets on front and rear doors and replace as necessary. •Seal and close front and rear doors properly. •Clean low and auxiliary low water cut-off controls, then re-install using new gaskets. •Clean plugs in control piping. •Remove all hand hole and man hole plates. Flush boiler with water to remove loose scale and sediment.
