compact residential unit, hydraulic interface unit for hot water production by the continuous flow principle and transfer of heat to radiator heaters. Installation as flush mounted version with flush box or as surface-mounted version with cover. The pipe connection to the residential unit hydraulic interface unit is created using a patented installation system with pre-installation bracket. Option to connect the pre-installation bracket from the floor.

Consisting of:

    • Copper-soldered asymmetrical stainless steel counter current heat exchanger
    • HERZ pressure and temperature controller for central regulation of the hot water temperature with integrated hot water priority circuit
    • Differential pressure controller on the heating side, permanently set to 13 kPa
    • Valve on heating side for regulation of the water flow
    • Actuating drive for installation on differential pressure controller; 230 V, 50 Hz, normally closed
    • Constant readiness for hot water production even in summer operating mode due to temperature-regulated bypass switching, permanently set to 45°C
    • Cold water meter adapter 110 mm – G 3/4 of dezincificationresistant brass, also suitable for sustained operation
    • Hot water flow meter adapter 110 mm – G 3/4 of dezincificationresistant brass, also suitable for sustained operation
    • Heat meter adapter 110 mm – G 3/4 of dezincification-resistant brass, also suitable for sustained operation
    • Strainer with fine mesh in primary supply line
    • Strainer with fine mesh in secondary return line

Max. operating temperature 90°C,
Max. operating pressure primary 10 bar
Max. heating power 10 kW
Min. stat. cold water pressure 2.8 bar
Tapping rate 18 l/min (10/50°C)
Heat exchanger power 51 kW
Max. differential pressure 2 bar

Accessories to be ordered separately:

- HERZ pre-installation bracket 1 4020 97
- HERZ shutoff ball valves in place of the pre-installation bracket 1 4020 99
- HERZ flush box 1 4008 06
- HERZ surface mount cover 1 4008 08
- HERZ measurement, control and draining set for hydraulic interface unit 1 4008 98
- HERZ sensor mount for temperature sensor (M 10 x 1) for the heat meter 1 4022 46