When the ignition switch of the wall-hung boiler is in working status, the fan starts and form a negative pressure difference in the combustion chamber. The air pressure switch sends a command to activate the water pump, the water flow switch sends the command to the high-voltage discharger. After the high-voltage discharger initiated, another signal is sent to the gas proportional valve, then the gas proportional valve come into operation accordingly. GPS100 series air pressure switches are used as detection elements. It is interlock controlled with the gas proportional valve and the flue gas induction switch. Proportional valve only works under a certain negative gas pressure in combustion chamber. When the flue gas induction switch detects no exhaust gas for 5 seconds, air pressure switch will close the gas channel in time, to avoid gas leaking.
Micro Air pressure switch is usually applicated in traditional water heater, wall-hung boiler and HVAC devices for detecting the gas pressure and protecting relevant circuits.
Remarks:
The wall-hung boiler is a water heater that uses natural gas as energy. It is not only attractive in appearance, easy to use, but also small in size. It does not occupy a lot of usable area when it is installed on the wall of the family house. The wall-hung boiler can not only provide a large flow of constant temperature hot water for bathing, but also has a powerful central heating function for the family house, which can meet the heating needs of multi-room.