Compact, pre-assembled and tightness-tested hot water circulation system, consisting of thermal mixing valve with integrated scald protection, thermometer, shut-off valve, drain valve for venting or flushing the circulation line as well as connection parts as per DIN 1988. The hydraulic assembly is suitable for storage systems which are already fitted with with safety-related equipment such a diaphragm safety vales backflow preventers or where such equipment is to be installed in the form of conventional individual components. Storage systems without safety-related equipment can be retrofitted with the safety group assembly WSG 150.
WZS 75 optimises temperature control in the hot water circulation and ensures that the temperature in the storage system is not unnecessarily reduced. A partial volume of the returning circulation water flows directly to the cold water inlet of the thermal mixing valve via an internal connection. Depending on the water temperature at the inlet of the mixing valve, it is then controlled as required.