4021

HIU LEN, in a 4-pipe system, for maximum DHW comfort with simultaneous use in modern low-energy networks. Supply via district heating or central heat generation, with separate energy circuits for hot water and space heating. The 4-pipe system allows the station to be used for heating as well as cooling with simultaneous decentralised hot water production.
Highest energy efficiency in heat supply can thus be achieved. The station uses a highly efficient heat exchanger for immediate hot water production as required in the high-temperature circuit. The room heat or room cooling is separated from this and supplied directly from the separate low-temperature circuit for surface heating or surface cooling, via an integrated, dynamically controlled heating circuit distributor. The pipe connection to the heat exchanger is made via ball valves. The pipes can be connected from the floor.
Consisting of:
• Copper-brazed asymmetrical stainless steel plate heat exchanger
• HERZ pressure and temperature controller for central control of the hot water
temperature
• Constant readiness for hot water preparation even in summer operation due to
temperature-controlled bypass circuit, fixed at 45 °C
• 2 heat meter adaptors 110 mm - G 3/4" made of dezincification-resistant brass,
also suitable for continuous operation
• 80 mm fitting for the water meter
• Strainer with fine mesh in the primary flow pipe
• Differential pressure regulator with integrated control, isolation and zone
valve in the secondary circuit
• Differential pressure regulator 25 - 60 kPa in the high-temperature circuit
• Connections: AG 3/4" Conical seal
• Max. operating pressure Operating pressure: 10 bar
• Max. supply temp. HIU LEN : 60 - 85 °C
• Min. drinking water flow pressure: 2.8 bar
11 l/min
• HIU LEN: 1 4021 20
• Flush-mounted box with ball valve strip and integrated
connection pipework for the heating circuit distributor: 1 4018 70
• Front frame and front door white, powder-coated (RAL 9016),
Front door with bolt: 1 4018 69
• HERZ sensor receptacle for temperature sensor (M 10 x 1)
for the heat meter for hot water preparation: 1 4111 60
• HERZ sensor holder for temperature sensor (M 10 x 1)
for the heat meter heating: 1 4022 46