How to start a steam boiler?

1、Ensure that the vent valve on the boiler is open and check there is no pressure in the boiler. Check that the steam stop valve is closed. Check that all the valves for fuel are open, and let the fuel circulate through the system until it comes to the temperature required by the manufacturer recommendation.

2、Check whether the power supply, natural gas, instrument air, etc. meet the boiler operation requirements.

3、Check and open the feed water valves to the boiler and fill the water inside the boiler drum to just above the low water level. This is done because it is not possible to start the boiler below the low water level due to safety features that prevent the boiler from starting. Also, the level is not filled much because if filled too much, the water inside the boiler might expand and over pressurize the boiler. The boiler feed water level should be around 50%.

4、Start the boiler in automatic mode. The burner fan will start the purging cycle which will remove any gases present in the furnace by forcing it out through the funnel.

5、After the pre-set purge time the pilot burner will ignite. The pilot burner consists of two electrodes, through which a large current is passed, via the transformer, producing the spark between the electrodes. The pilot burner is supplied with diesel oil and when the oil passes over, the former ignites.

6、Realize the gas supply by opening the pressure reducing valve of the natural gas pipeline. Replace it with the vent valve for 2 to 3 minutes, and then close the vent valve after the steam starts coming outside.

7、Check the combustion chamber from the sight glass to ensure the burner has lit and the flame is satisfactory.