The working principle and process of the gas wall-hung boiler
The gas-fired wall-hung boiler is mainly ignited and burned by premixing the gas and air, and the heat medium water (or Domestic hot water heating), and then heat the air through the cooling end for heating or heating.
The working process of the gas wall-hung boiler is: in the standby working state of the boiler, when the boiler senses the need for heating, the fan starts, and a 30-second “pre-purge” starts to form a negative pressure in the combustion chamber. The air enters the combustion chamber; the air pressure differential switch is activated, the gas solenoid valve is opened, and the gas enters the combustion chamber and is premixed with the air; the circulating water pump starts to work; at the same time, the ignition electrode begins to discharge to form an arc to ignite the gas. The boiler water in the boiler is heated for heat exchange, and the circulating water pump sends out the hot water for heat exchange with the secondary system for heating or heating.
After ignition, a probe detects the negative ion current (several microA) of the flame to the main board, and the main board can only continue to receive working heating or heating.
When there is a demand for domestic hot water, the domestic hot water flow switch starts and switches the electromagnetic three-way valve, the boiler water passes through the heat exchanger to exchange the domestic hot water, and then supplies the domestic hot water.
