Abstract: Method for operating a gas burner appliance (10) comprising: a combustion chamber (11), an ignition device (27), a fan (14), a gas safety valve unit (19) assigned to the gas duct (16), an electric gas flow modulator (18) assigned to the gas duct (16), a sensor (21) positioned between the gas safety valve unit (19) and the gas flow modulator (18), wherein the gas burner appliance (10) is operated to determine the gas family of the gas of the gas/air mixture by the following steps: Before the gas burner appliance becomes started measuring the ambient air pressure by the sensor (21), wherein the ambient air pressure is measured when the safety valve unit (19) is closed, the gas flow modulator (18) is opened and the fan (14) is stopped.

Abstract: Flow modulator (10) for a fluid like combustion gas, comprising: a housing (11), a modulator body (14) positioned with the housing (11), and a valve body (18) positioned with the housing (11). The modulator body (14) has a flow channel (15) and an opening (16) providing together a flow passage (17) for the fluid. The valve body (18) is provided by a foil element (19), wherein the foil element (19) has an opening (20) for the fluid, wherein the foil element (19) is rotatable relative to the modulator body (14) to modulate the flow of the fluid by adjusting an overlap between the opening (20) of the valve body (18) and the flow passage (17) of the modulator body (14), and wherein the foil element (19) is positioned up-stream of the modulator body (14) such that an inlet pressure of the fluid presses the foil element (19) against the modulator body (14) thereby providing a sealing level between the foil element (19) and the modulator body (14).

Abstract: In some examples, a method for operating a gas burner appliance includes determining, on basis of a nominal burner-load and on basis of a mixing ratio of gas and air of a gas/air mixture or a ?-value of the gas/air mixture, a nominal air mass flow in order to provide the nominal burner-load. The method further comprises determining the ambient air pressure and the ambient air temperature of the ambient air, determining, on basis of the ambient air pressure and on basis of the ambient air temperature, the atmospheric density of the ambient air, determining on basis of the nominal air mass flow, on basis of the determined atmospheric density of the ambient air, and on basis of a system resistance of the gas burner appliance, the fan speed of the fan in order to provide the nominal burner-load.

Abstract: A device for handling combustion gas comprises: a housing, a first electronic element, a second electronic element, a connecting element, and a sealing element. The housing defines a gas chamber for the combustion gas and an ambient chamber for ambient air. The first electronic element is positioned within the gas chamber and is exposed to the combustion gas. The second electronic element is positioned within the ambient chamber and is not exposed to the combustion gas but is exposed to the ambient air. The connecting element electrically connects the first electronic element and the second electronic element. The sealing element is made at least partially from an elastomer, and is compressed between the connecting element and the housing, and seals the gas chamber against the ambient chamber even if electrically insulating material of the connecting element or the connecting element is removed.

Abstract: In some examples, a method for operating a gas burner appliance includes determining, on basis of a nominal burner-load and on basis of a mixing ratio of gas and air of a gas/air mixture or a ?-value of the gas/air mixture, a nominal air mass flow in order to provide the nominal burner-load. The method further comprises determining the ambient air pressure and the ambient air temperature of the ambient air, determining, on basis of the ambient air pressure and on basis of the ambient air temperature, the atmospheric density of the ambient air, determining on basis of the nominal air mass flow, on basis of the determined atmospheric density of the ambient air, and on basis of a system resistance of the gas burner appliance, the fan speed of the fan in order to provide the nominal burner-load.

Abstract: Flow modulator (10) for a fluid like combustion gas, comprising: a housing (11), a modulator body (14) positioned with the housing (11), and a valve body (18) positioned with the housing (11). The modulator body (14) has a flow channel (15) and an opening (16) providing together a flow passage (17) for the fluid. The valve body (18) is provided by a foil element (19), wherein the foil element (19) has an opening (20) for the fluid, wherein the foil element (19) is rotatable relative to the modulator body (14) to modulate the flow of the fluid by adjusting an overlap between the opening (20) of the valve body (18) and the flow passage (17) of the modulator body (14), and wherein the foil element (19) is positioned up-stream of the modulator body (14) such that an inlet pressure of the fluid presses the foil element (19) against the modulator body (14) thereby providing a sealing level between the foil element (19) and the modulator body (14).

Abstract: Device (10) for handling combustion gas, comprising: a housing (11), a first electronic element (15), a second electronic element (16), a connecting element (17) and a sealing element (20). The housing (11) is made from metal, wherein said housing (11) has a first housing part (11a) and a second housing part (11b), wherein said housing (11) defines a gas chamber (12) for the combustion gas, and wherein said housing (11) defines an ambient chamber (13) for ambient air. The first electronic element (15) is positioned within the gas chamber and is exposed to the combustion gas. The second electronic element (16) is positioned within the ambient chamber and is not exposed to the combustion gas but is exposed to the ambient air. The connecting element (17) electrically connects the first electronic element (15) and the second electronic element (16), wherein said connecting element (17) has electrical conductive paths (18) being at least partially in connection with an electrically insulating material (19).