When the ignition switch of the wall-hung boiler enters the working state, the fan is started first to form a negative pressure difference in the combustion chamber, and the wind pressure switch sends instructions to the water pump. After the water pump is started, water flow switch sends an instruction to the high-voltage discharger. After the high-voltage discharger is started, the instruction is sent to the gas proportional valve, and the gas proportional valve starts. The gas proportional valve, the wind pressure switch and the smoke induction switch are interlocked.
Only when there is a certain negative pressure gas in the combustion chamber can the proportional valve work. When the smoke induction switch does not detect waste gas for 5 seconds, it will cut off the gas proportional valve and stop gas supply, thus ensuring the safe use of gas.
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Thermal equipment:
Gas-fired wall-hung boiler (also known as gas-fired heating water heater, please refer to GB25034-20 10 "Gas-fired heating water heater") uses natural gas, artificial gas or liquefied gas as fuel, and the fuel is output by the burner. After burning in the combustion chamber, the heat is absorbed by the heat exchanger. When the circulating water in the heating system passes through the heat exchanger, it is repeatedly heated, thus continuously outputting heat to the building.
Provide heat source for buildings. The general dual-purpose gas-fired wall-hung boiler not only has the function of heating, but also has the function of hot water (that is, besides heating, it also has the function of gas water heater). Wall-hung boiler can provide heat source for radiator and floor heating system. Commonly used wall-hung boilers are divided into dual-purpose boilers for heating and domestic hot water and single-layer heaters.
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