| 摘要 |
PURPOSE:To shorten the time of air vent by a method wherein short-time intermittent opening of a main burner is performed for venting air in the piping connected to gas appliance in addition to the opening of a pilot burner. CONSTITUTION:When a flow switch 3 is turned ON, a controlling valve 4 for the pilot burner is open through a controller 11 in order to lead gas to the pilot burner. At this time, when no ignition occurs immediately at the pilot burner in spite of electric discharges at an ignition plug 5 because of unsuccessful venting of the air in the piping, an air venting switch 12 is turned ON, resulting in interlocking a timer circuit 13 with the controller 11. The timer circuit 13 contains a function to open and close a controlling valve 8 for the main burner and opens and closes the controlling valve 8 intermittently for an arbitrary short time. Consequently, the time of air vent can be shorten and at the same time demerits such as explosive ignition, back fire and the like, which may occur when gas appliance is directly connected to a main burner, can be prevented. |
