Method and Controller for Operating a Gas Burner Appliance

A method for operating a gas burner appliance,

• the gas burner appliance comprising:
• a combustion chamber being configured to combust a defined gas/air mixture,
• a mixing device being configured to provide said gas/air mixture by mixing an airflow provided by an air duct with a gas flow provided by a gas duct,
• a fan being configured provide the air flow or the flow of the gas/air mixture,
• a gas safety valve unit assigned to the gas duct being configured to open or close the gas duct,
• the gas safety valve unit having a first gas safety valve and a second gas safety valve positioned downstream of the first gas safety valve,
• a gas flow modulator assigned to the gas duct being configured to keep a mixing ratio of gas and air within the gas/air mixture at a defined value,
• an electrical or electronic absolute pressure sensor assigned to the gas duct positioned downstream of the first gas safety valve,
• wherein the gas burner appliance is operated to compensate for a fluctuating gas inlet pressure of the gas burner appliance by executing the following steps:
• measure a first absolute pressure by the absolute pressure sensor when at least the first gas safety valve of the gas safety valve unit is closed,
• measure a second absolute pressure by the absolute pressure sensor when the gas safety valve unit is opened, determine a pressure difference between the first absolute pressure or a pressure depending on the first absolute pressure and the second absolute pressure or a pressure depending on the second absolute pressure,
• operate the gas flow modulator dependent from said pressure difference.