Working principle of wall-mounted fireplace

When the ignition switch of the boiler is in working state, the fan starts first to form a negative pressure difference in the combustion chamber. The air pressure switch sends the command to the water pump. After the pump starts, the water flow switch sends the command to the high-pressure discharger. Gas proportional valve, gas proportional valve starts. The gas proportional valve, the air pressure switch and the flue gas sensor switch are interlocked. The combustion chamber has a certain negative pressure gas. The proportional valve can work. When the flue gas sensor switch does not detect the exhaust gas in 5 seconds, the gas is cut off. The proportional valve stops the gas supply, thus ensuring the safe use of gas.