HIU Slovakia NT/HT with circulation, compact hydraulic interface unit for hot water production by the continuous flow principle and transfer of heat to low-temperature heating and radiator outlet. Installation as flush-mounted version with flush box or as surface-mounted version with cover.

The pipe connection to the 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 plate heat exchanger;
• HERZ pressure and temperature controller for central regulation of the hot water temperature;
• 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" made of dezincification-resistant brass, also suitable for continuous operation;
• Heat meter adapter 110 mm – G 3/4" made of dezincification-resistant brass, also suitable for continuous operation;
• Strainer with fine mesh in primary supply line;
• Fixed value control with setting range 20 °C – 50 °C consisting of zone valve, thermostat with contact sensor, safety thermostat and circulating pump;
• Differential pressure controller with integrated control valve, shut-off valve and zone valve in the secondary circuit;
• Circulation;
• Additional radiator outlet;
• Zone valve TS-E with actuating drive;
• Empty weight: 21.5 kg;
• Connection: Male thread 3/4" flat sealing;
• Nominal pressure: 10 bar;
• Max. supply temperature: 70 °C;
• Min. flow pressure mains cold water: 2.8 bar;
• Tap quantity: 18 l/min;
• Circulation pump space heating: Wilo Para RS 15/6 (SCU) or similar;
• Circulation pump domestic hot water: Wilo Star-Z NOVA or similar;
• Cover wide: 1 4021 87;
• Flush-mounted box wide: 1 4021 97;
• Door and frame wide: 1 4021 99.