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HIU 2 series
Heat Interface Unit for hygienic domestic hot water
generation and heat distribution
Installation and Operating Manual (translated
from the original operating manual)
Watts Industries Deutschland GmbH
Godramsteiner Hauptstr. 167
76829 Landau
Tel.: +49 (0) 6341 96560
wide@wattswater.com
WattsWater.de
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Summary of Contents for Watts HIU 2 Series
- Page 1 HIU 2 series Heat Interface Unit for hygienic domestic hot water generation and heat distribution Installation and Operating Manual (translated from the original operating manual) Watts Industries Deutschland GmbH Godramsteiner Hauptstr. 167 76829 Landau Tel.: +49 (0) 6341 96560 wide@wattswater.com...
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Page 2: Table Of Contents
ENGLISH Contents 1 General information 1 General information ........2 1.1 Important information about the installa- 1.1 Important information about this installation and operating tion and operating manual manual ................2 The operator is responsible for ensuring adherence to the local laws and regulations 1.2 Product conformity ............2 (e.g. -
Page 3: Product Label
ENGLISH 1.4 Product marking HIU2-IM-DE-W-DE-08-2018-Rev1_DE-enUS | Art. No. 10078860... -
Page 4: Technical Data
ENGLISH 2 Technical data Hydraulic performance data HIU 2 HK / HIU 2 HKM Max. operating pressure 10 bar (PN 10) Max. ambient temperature 60 °C Max. operating temperature 90 °C Differential pressure 200 mbar preset. Adjustable: 100 to 300 mbar Media Water/water-glycol mixture as per VDI 2035/ÖNORM (Austrian standard) 5195 Actuating drive... -
Page 5: Safety
ENGLISH 3 Safety 3.3 Intended use Ready-to-install compact, decentralized heat interface unit for hygienic domestic hot water generation and heat distribution 3.1 Depiction of safety information in single-family houses and townhouse systems as well as for use in multi-story apartment blocks. DANGER indicates an imminent danger that may cause serious physical injury or The HIU 2 is not intended to be operated by people (includ-... -
Page 6: Personnel Groups
ENGLISH 3.6 Personnel groups Only qualified persons may install and operate the HIU 2 or perform maintenance work. Operator An operator is deemed to be qualified if they have read these operating instructions and understood the potential hazards associated with improper behavior. Fitter/commissioning engineer A plumber or commissioning engineer is in a position, taking into consideration the applicable standards, provisions, regu-... -
Page 7: Structure
ENGLISH 4 Structure HIU 2 HK HIU 2 HKM 10079852 HIU 2 HK 12 CU 10079851 HIU 2 HKM 12 CU 10079891 HIU 2 HK 12 STS 10079892 HIU 2 HKM 12 STS 10078464 HIU 2 HK 17 CU 10078463 HIU 2 HKM 17 CU 10079893 HIU 2 HK 17 STS 10079894 HIU 2 HKM 17 STS •... -
Page 8: Hydraulic Diagram
ENGLISH 4.1 Hydraulic diagram HIU 2 HK HIU 2 HKM 130mm 140mm 490mm 500mm Optional: Optional: Optional: HIU2-IM-DE-W-DE-08-2018-Rev1_DE-enUS | Art. No. 10078860... -
Page 9: Hiu 2 Hk
ENGLISH 4.2 HIU 2 HK Vent Temperature sensor Water hammer arrestor (optional) Junction box Thermal valve Plate heat exchanger Switch valve, heating circuit/hot water Actuating drive Flow switch Connection for supply temperature sensor of the heat meter Dirt trap Membrane regulator/differential pressure regulator Circulation set (optional) Zone valve (heating circuit) 22 23 24... -
Page 10: Hiu 2 Hkm
ENGLISH 4.3 HIU 2 HKM Connection for supply temperature sensor of the heat meter Dirt trap Membrane regulator/differential pressure regulator Circulation set (optional) Adapter for cold water meter Adapter for heat meter connector Supply heating circuit Return heating circuit Domestic hot water outlet Domestic water circulation inlet Domestic cold water outlet Domestic cold water inlet... -
Page 11: Installation And Commissioning
ENGLISH 5 Installation and commissioning 5.1 Installation All screw fittings must be checked and tightened if nec- essary prior to installation and commissioning. Electricity! Torque: Risk of death from electric shock. • ¾” screw fittings 35 Nm • Work on parts carrying live voltage must •... - Page 12 ENGLISH 3. Connection to power mains (230V). Hot water! 4. Set the desired tapping temperature on the thermostatic Severe scalding possible. head (X). Do not reach into the hot water when emptying the HIU 2. Ensure that the HIU 2 has cooled down before carrying out maintenance, clean- ing and repair work.
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Page 13: Power Curves And Diagrams
ENGLISH 6 Power curves and diagrams 6.1 Power curves Heat interface unit HIU 2, 26 plates, 12 l/min., 200 mbar DHW temperature, secondary circuit, with various primary supply temperatures 65 °C 60 °C 55 °C 50 °C tapping rate [l/min] Heat interface unit HIU 2, 36 plates, 17 l/min., 200 mbar DHW temperature, secondary circuit, with various primary supply temperatures 65 °C... -
Page 14: Pressure Loss Diagrams
ENGLISH 6.2 Pressure loss diagrams Primäre Seite, Trinkwassererwärmung über Wärmetauscher Primary circuit, domestic hot water generated by the heat exchanger 26 Platten, 12 l/min., Kvs-Wert: 1,35 m³/h (gestrichelte Linie) 26 plates, 12 l/min., Kvs value: 1.35 m³/h (dotted line) 36 plates, 17 l/min., Kvs value: 1.42 m³/h (solid line) 36 Platten, 17 l/min., Kvs-Wert: 1,42 m³/h (durchgehende Linie) 1.000 1.000... - Page 15 ENGLISH Primäre Seite, Heizungsbedarf, Wohnungsstation Primary circuit, demand heating, heat interface unit HIU 2 HKM, Kvs-Wert: 1,6 m³/h (gestrichelte Linie) HIU 2 HKM, Kvs value: 1.6 m³/h (dotted line) HIU 2 HK, Kvs-Wert: 1,7 m³/h (durchgehende Linie) HIU 2 HK, Kvs value: 1.7 m³/h (solid line) 1.000 1.000 10.000...
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Page 16: Maintenance
ENGLISH 7 Maintenance 7.1 Annual maintenance intervals 1. General visual inspection Electricity! • Check the station for leaks, annual maintenance intervals, if necessary Only perform maintenance work on the HIU 2 if the voltage supply has been 1. General visual inspections disconnected. -
Page 17: Cleaning The Dirt Trap
ENGLISH 7.3 Cleaning the dirt trap 1. Depressurize the HIU 2 (e.g. by opening the vent valve). 2. Unscrew and remove the dirt trap and clean it. 3. Replace the filter into the dirt trap after cleaning. 4. Slowly open the stop valves and vent the system. 7.4 Replacing the plate heat exchanger 1. -
Page 18: Spare Parts List
ENGLISH 8 Spare parts list Spare part Art. No: Plate heat exchanger 10080356 XB06H-1-26, 4x3/4“, copper Vent valve 10001506 brazed 1/2” 10080358 Plate heat exchanger XB06H-1-26, 4x3/4“, stain- less-steel brazed 3-way valve 10001552 Plate heat exchanger 10080355 DN25 XB06H-1-36, 4x3/4“, copper brazed Plate heat exchanger 10080357... -
Page 19: Disposal
WATTS products are tested extensively. WATTS therefore guarantees only the replacement or, at the sole discretion of WATTS, the free-of-charge repair of components of the supplied products where these, in the opinion of WATTS, exhibit verifiable manufacturing faults. Warranty claims due to defects or defects of title may be asserted within one (1) year of delivery/transfer of risk.