Compact substation for drinking water systems and radiator heating utilising ad countercurrent heat exchanger made of Cu/Ni brazed stainless steel. Centrald controller for hot water only operates as a pressure drop is detected when ad hot tap is opened. Assembly is available in surface-mounting or flush-mountedd versions. Pipe connection to an HIU is realised by means of a patentedd mounting system with pre-mounting unit. This unique installation systemd saves the installer the often complicated and time-consuming calibration andd adjustment measures required on existing (pre-) installations. Ball valves cand be connected optionally to the wall or to the floor. Pipe connection is realisedd by means of ball valve with T-handle.

Constant readiness for hot water even in summer mode by temperature-controlled summer bypass optional.

• Safety against scalding by integrated HERZ-thermostatic mixing valve
• Differential pressure controller with fixed DP fitted on the heating circuit cand be operated as a zone valve with a thermo electric drive for regulating thed room temperature.
• Adaptor for cold water meterd
• Adaptor for heat meterd
• Strainer with fine-mesh screens for heating systems on the supply primaryd pipe and return secondary pipe
• Hot water priority, is achieved by isolating the primary flow to the heatingd when a hot tap is opened.d
• Max. operating temperature 90 °Cd
• Max. operating pressure 10 bard - Min. static cold water pressure 2.8 bard
• Tap output 15 l/min (10/52 °C)d
• Heat exchanger output 35 kWd The following accessory to be ordered separately:d - HERZ cover 1 4008 08