De Dietrich 300009731 ignition electrode

The De Dietrich 300009731 is an ignition electrode for gas burners. In a burner system, the ignition electrode delivers the spark that lights the fuel-air mixture. It is energised by the ignition transformer, which is controlled by the burner control unit during the ignition phase. The electrode is mounted in the flame zone, typically near the main burner or pilot burner. Parts of this type are consumable components because they are exposed to high temperature and electrical erosion. Ignition electrodes are selected by the burner series they were designed for, which determines the electrode length, bend, insulator diameter, spark gap, and mounting flange. Common failure modes include erosion of the tip, cracking of the ceramic insulator, sooting that bridges the gap, and a drifting gap that lengthens the spark path and delays ignition. When replacing such an electrode, the gap should be set to the value specified for the burner, the ceramic must be free of cracks, and the mounting position must ensure the spark is directed into the fuel stream. This article is listed under the De Dietrich brand with manufacturer codes 300009731 and 336.946.040.