De Dietrich 7602965 hydraulic combi unit 39 kW

This is a De Dietrich hydraulic combi unit, catalogue article 336.124.007, also listed under manufacturer code 7602965, and rated for 39 kW. Parts of this type integrate several hydraulic functions in a single assembly — typically a three-way valve, a pressure relief valve, and connections for the expansion vessel and circulation pump. They manage the flow of heating water and domestic hot water in combination boilers, directing water from the primary to the secondary circuit when there is a hot water demand. Selection of a replacement unit depends on the hydraulic configuration of the original: the number and position of threaded connections, the pressure rating, and the flow characteristics. The kW indication (39 kW) refers to the thermal output of the boiler for which the unit was designed. When replacing, verify that the new unit matches the original hydraulic schematic and port arrangement. Leak-tight sealing is essential; always use new gaskets or O-rings on all connections. Because these units contain moving parts (the diverter valve spindle and the pressure relief valve), they should be checked periodically for smooth operation and freedom from scale or debris.