De Dietrich S101750 plate heat exchanger 28 kW

This is a De Dietrich plate heat exchanger, catalogue article 336.781.009, manufacturer code S101750, with a rated capacity of 28 kW. It is listed in the heat exchangers section. Parts of this type transfer heat from the flue gases to the heating water in a boiler; a secondary plate exchanger is typically used to produce domestic hot water. In the system, the heat exchanger sits between the combustion chamber and the water circuit, and its performance directly affects overall efficiency. Plate heat exchangers of this class are selected based on model-specific dimensions, the number of plates or flow ways, material (commonly stainless steel, copper, or aluminium alloy), and the type of gasket fitted. When replacing such a unit, ensure the connection pattern, plate count, and gasket profile match the original. Typical failure modes include scaling on the water side, soot accumulation on the gas side, gasket leaks, and, in condensing boilers, corrosion where condensate collects. Always inspect the mating surfaces and replace gaskets if the old unit shows signs of leakage. No further specifics about this particular article, such as exact dimensions, connection sizes, or material composition, are available from the source data.