De Dietrich 85185514 bruciatore ad accensione a tubo 3 - 7 - 10 sezioni

This is a De Dietrich 85185514 tube ignition burner, listed under catalogue article 336.835.004. The designation “3-7-10 sections” refers to the number of boiler sections the burner tube is intended to match. Parts of this type are installed in sectional boilers, where the tube length must correspond to the depth of the combustion chamber as determined by the section count. The tube houses the ignition electrode and delivers the spark into the air–fuel mixture, forming part of the burner assembly on the front plate. Selection of a tube ignition burner is based on the number of boiler sections, because the tube length and sometimes the mounting flange or thread differ with each section count. The tube material and sealing method must also be compatible with the burner head and the boiler front plate. When replacing a tube of this kind, inspect the tube for cracks, distortion or carbon deposits that could affect the electrode position or flame shape. Electrode gap and insulation must be checked after installation. Manufacturer-specific tube ignition burners rarely have generic equivalents, as the geometry is fixed by the boiler model and the burner design. Use only a part with the correct section count and brand compatibility to ensure proper fit and ignition performance.