| 摘要 |
PURPOSE:To facilitate an operation by performing an ignition, combustion extingushing with one changing-over operation with one operating button and to save energy by extinguishing the pilot burner at its extinguishing position. CONSTITUTION:An operating lever 1 for changing-over ignition, combustion and extinguishing causes an opening operation of a gas main cock solenoid valve 2 to be cooperated with a closing operation of an ignitor switch S1 and a flame sensing circuit switch S2 at the ignition position, pilot burners 6 and 7 are ignited by an ignitor 8, and the opened condition of the gas main cock solenoid valve 2 is kept under a confirmation of the flame for the flame rod 9. At the combustion position, an opening operation of the ignitor switch S1 and an opening operation of a water cock 10 are cooperatively related and the combustion in a main burner 15 is performed under the opening operation of the gas automatic valve 14 caused by a hydraulic pressure. Further, at the extinguishing position, a closing operation of the water cock 10 and an opening operation of a flame sensor circuit switch S2 are cooperatively related to close the gas automatic valve 14, the main burner 15 is extinguished, the gas main cock solenoid valve 2 is deenergized and the pilot burner is extinguished. |
