De Dietrich Complete left-hand side section 83585509

The De Dietrich 83585509 is a genuine, complete left-hand side section for a sectional cast-iron heat exchanger. It is a subassembly that forms the outermost part on the left side of the heat exchanger core, transferring heat from flue gases to heating water or domestic hot water. This unit includes the necessary end plate and connection arrangement, and is supplied fully assembled. It weighs approximately 49 kg and requires special shipping due to its size and weight.

Parts of this type are selected by model-specific dimensions, number of sections (plates or ways), material, and gasket type used between sections. When fitting a left-hand side section, ensure the gasket surface is clean and the section mates flush with adjacent sections to prevent flue gas bypass or water leakage. Verify fitment using the original boiler data, as no dimensions or specific boiler compatibility are stated here.

Common failure modes for heat exchanger sections include scaling on the water side, soot accumulation on the gas side, gasket leaks, and, in condensing boilers, corrosion where condensate collects. These issues can lead to reduced heat transfer, water leakage, or flue gas bypass. Check for these signs when inspecting the equipment.