Before ignition of combustion system, conduct furnace purging for 5 minutes.<br>Ignition safety control system: at the end of purging, the air electric actuator returns to the minimum opening (about 10 degrees), and the system enters the ignition control program. Turn on the heating signal during ignition, open the fuel solenoid valve, discharge the ignition transformer, output the ignition success signal after detecting the flame, and the combustion system enters the automatic temperature control state.<br>
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