| 摘要 |
To control a gas burner (1), especially with a fan (2), an electronic control unit (3) delivers a nominal signal for the volume of gas fuel and air to be supplied for a given burner power output, for the control system (4,5) for the gas fuel supply. A sensor (6) at the exhaust monitors the carbon monoxide concentration in the exhaust gas, and generates a signal to represent its reading. A calibration process is triggered after a given burning time or at periodic intervals, where the gas/air mixture is enriched until the exhaust sensor signal alone, or in combination with another signal, matches a given threshold value. In this condition, the fuel gas and air volume signals are registered, and the gas/air mixture is reduced to a leaner level in a given ratio to establish the new nominal value for the mixture. |
