De Dietrich 85188922 bruciatore di accensione 4 alle sezioni 6

This is a De Dietrich pilot burner, catalogue article 336.205.001, also listed under manufacturer code 85188922. The product name describes it as an ignition burner for 4 to 6 sections. In a boiler or burner system, a pilot burner of this type carries a small permanent or intermittent flame that lights the main burner and holds the flame signal for the burner control during operation. The pilot burner contains the ignition and ionisation electrodes within its assembly; the ignition electrode delivers the spark, and the ionisation electrode proves the flame by conducting a small rectified current through it. Parts of this class are consumable items because they live directly in the flame zone. Selection is determined by the gas type (natural gas or LPG), the burner series or boiler model they were shaped for, the mounting flange configuration, and the orifice size that sets the pilot flame intensity. When replacing a pilot burner, common failure signs include an eroded electrode tip, cracked ceramic insulation, sooting on the flame sensor, or a drift in the spark gap that prolongs ignition. Always verify that the replacement unit matches the original flame shape and gas flow rate required by the burner control box to ensure reliable ignition and flame proving.