compact residential unit, hydraulic interface unit for hot water production by continuous flow principle and of heat to radiator heaters via separate heat exchanger. Installation as surfacemounted version with cover. The pipe connection to the residential unit hydraulic interface unit is created using a patented installation system with pre-installation bracket.

Consisting of:

• Copper-soldered asymmetrical stainless steel plate heat exchanger
• Second heat exchanger for system separation on the secondary heating circuit
• HERZ pressure and temperature controller for central regulation of the hot water temperature with integrated hot water priority circuit
• Circulating pump for the secondary heating circuit
• Constant readiness for hot water production even in summer, operating mode due to temperature-regulated bypass switching, permanently set to 45°C
• Heat meter adapter 130 mm – G 3/4 made of dezincificationresistant brass, also suitable for continuous operation
• Automatic air vent in secondary circuit
• Diaphragm expansion tank secondary
• Diaphragm safety valve 3 bar secondary
• Strainer with fine mesh in primary supply line
• Strainer with fine mesh in secondary return line
• Wheater-driven heating control
• RISE certified

Max. operating pressure on primary circuit 16 bar

Max. heating power 15 kW

Min. stat. cold water pressure 2.5 bar

Tapping rate 20 l/min (10/50°C)

Heat exchanger output 55 kW

Max. differential pressure 2 bar

Recommended min. differential pressure DP 55 kPa

Accessories to be ordered separately:

- HERZ- pre-installation bracket 1 4023 41