Compact substation for drinking water systems and radiator heating utilising a countercurrent heat exchanger made of Cu/ Ni brazed stainless steel. Central controller for hot water only operates as a pressure drop is detected when a hot tap is opened. Assembly is available in surfacemounting or flush-mounted versions. Pipe connection to an HIU is realised by means of a patented mounting system with pre-mounting unit. This unique installation system saves the installer the often complicated and time-consuming calibration and adjustment measures required on existing (pre-) installations. Pipe connection is realised by means of a ball valve with T-handle.

• Safety against scalding by integrated HERZ-thermostatic mixing valve.
• Differential pressure controller with fixed DP (23 kPa)
• Adaptor for cold water meter
• Adaptor for heat meter
• Strainer with fine-mesh screens for heating systems on the supply primary pipe and return secondary pipe.
• Max. operating temperature 90°C
• Max. operating pressure 10 bar
• Min. static cold water pressure 2.8 bar
• Tap output 15 l/min (10/50°C)
• Heat exchanger output 45 kW The following accessories to be ordered separately:
• HERZ flush-mounted body 1 4008 06
• HERZ cover 1 4008 08