ABSTRACT
The condition of the burner system and combustion process can be judged by the excess oxygen level. Boiler start up records and records of previous tune-ups provide a valuable reference point for our tune-up program. Even a call to the manufacturer can provide useful information on the boiler’s expected performance characteristics and minimum expected excess air levels. Stack temperature measurements are an easy and effective means for monitoring boiler tube cleanliness and the general effectiveness of the heat exchange process in a boiler. Existing temperatures can be compared to values obtained during start up or after maintenance and cleaning, to identify any deviations from baseline levels. Before a tune-up of the boiler control system is started a check for system linearity should be done. This requires a measurement of either steam output or fuel input be compared to control system position.
