When the ignition switch of the wall-hung boiler enters the working state, the fan first starts to create a negative pressure difference in the combustion chamber, and the air pressure switch sends the command to the water pump. After the water pump is started, the water flow switch sends the command to the high-voltage discharger, and the command is issued after the start. The gas proportional valve and the gas proportional valve start to start.
The gas proportional valve and the air pressure switch and the flue gas induction switch are interlocked. The combustion chamber has a certain negative pressure gas, and the proportional valve can work. When the 5 second kind of flue gas induction switch detects that there is no exhaust gas, the gas is cut off. The proportional valve stops supplying air, thus ensuring safe use of the gas.
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