| 摘要 |
PURPOSE:To prevent an excessive spout of fuel prior to an ignition thereof at a breakdown of abnormal flame detecting mechanism, by providing a means adapted to block a fuel supply passage upon an abnormality detecting electric current from an abnormal flame detecting mechanism exceeding a certain level prior to a start-up of ignition action. CONSTITUTION:When a heating operation is started, a microcomputer 3 compares an abnormality detecting electric current A of abnormal flame detecting circuit 2 with a prestored electric current A0 after actuation of electric motor gasfying an oil. If this comparison is found as A>A0, it is assumed that there takes place an abnormality in the abnormal flame detecting circuit 2, an a relay 6 is turned OFF via a relay energizing circuit 5. This can cause an electromagnetic valve in a fuel supply passage to close and actuate a displaying section 8 to display abnormality in the abnormal flame detecting circuit 2. On the other hand, if the result of above comparision is found to be as A<A0, it is assumed that the abnormal flame detecting circuit 2 operates properly and the above electromagnetic valve is opened for spouting the fuel, while simultaneously actuating an ignition means to operate for starting up the heating operation. |
