De Dietrich 97955789 electrodes

The De Dietrich 97955789 electrodes (catalogue article 336.946.027) are listed in the ionization and ignition electrodes category. Parts of this type serve one of two functions in a burner: ignition electrodes deliver the spark that lights the fuel-air mixture, while ionisation electrodes prove the presence of flame by conducting a small rectified current through it. Both live directly in the flame zone and are classified as consumable items. Selection of such electrodes depends on the physical shape—electrode length, bend, insulator diameter, gap—and the mounting flange configuration, all of which are specific to the burner series they were originally designed for. Typical failure modes include an eroded tip, cracked ceramic insulation, soot build-up on the insulator, and a drifting electrode gap that lengthens ignition time. In systems that use a pilot burner, the pilot carries a small permanent or intermittent flame that lights the main burner and maintains the flame signal; the electrode in that pilot must match its geometry precisely. When replacing an electrode of this type, the heating engineer should verify the gap setting and the condition of the ceramic insulator before fitting. No dimensions or compatibility with specific boiler models are supplied with this article; the codes 97955789 and 336.946.027 are the manufacturer references for ordering. The part belongs to the De Dietrich brand range.