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INSTALLATION, MAINTENANCE & OPERATING INSTRUCTIONS
HEAT INTERFACE UNIT (HIU) 15 & 20l/min
For service contact the installer or the Community Heating Maintenance Company
Herz Valves UK Ltd.
Progress House, Moorfield Point
Moorfield Road, Slyfield Industrial Estate
Guildford, Surrey GU1 1RU
Tel: 01483 502211, Fax: 01483 502025
Contents
E-Mail:
sales@herzvalves.com
www.herzvalves.com
HERZ OXFORD DOMESTIC HOT WATER
Please note actual unit may vary from above picture
FOR
Herz Armaturen GmbH
Richard-Strauss-Str. 22, A - 1230 Vienna
Tel.: +43 (0)1 616 26 31-0, Fax: +43 (0)1 616 26 31-27
E-Mail: office@herz.eu
Issue 0916
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Table of Contents
Summary of Contents for Herz OXFORD
- Page 1 INSTALLATION, MAINTENANCE & OPERATING INSTRUCTIONS HERZ OXFORD DOMESTIC HOT WATER HEAT INTERFACE UNIT (HIU) 15 & 20l/min Please note actual unit may vary from above picture For service contact the installer or the Community Heating Maintenance Company Herz Valves UK Ltd.
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Page 3: Table Of Contents
Contents 1.0 General Page 4 1.1 Description, main features and function of the Herz Oxford HIU Page 4 1.2 Warnings Page 5 1.3 Layout and components Page 6 1.4 General Page 6 2.0 Installation Instructions Page 7 2.1 Installation Page 7 3.0 Commissioning... -
Page 4: General
1.1 Description, main features and function of Herz Oxford Heat Interface Units Description The Herz Oxford Domestic Hot Water Heat Interface Unit (HIU) provides domestic hot water to properties that are serviced from district heating or central boiler plants. The HIU comprises of a single heat exchanger providing instant domestic hot water at a safe regulated temperature. -
Page 5: Warnings
Only use original HERZ spare parts when maintaining the HIU. Check all connections for leakages prior to starting up the heating system. The user must not make any technical changes to the HIU. Otherwise HERZ will not assume liability for any resulting damage. -
Page 6: Layout And Components
1.3 Layout of components Description DHW Heat Exchanger – Stainless Steel brazed Pressure Temperature Control Valve Thermostatic Head with contact sensor Primary Flow Strainer Primary Circulation Thermostatic Bypass Valve Differential Pressure Control Valve Optional Heat Meter or spacing piece Optional Water Meter or spacing piece Drain and Vent Valves Primary Flow Isolation &... -
Page 7: Installation Instructions
2.0 Installation Instructions Pre-installation Please ensure that drain cocks are fitted to the relevant pipework prior to the HIU being fitted to facilitate any necessary filling and draining functions. All pipes connected to the HIU must be insulated to prevent any thermal transfer. 2.1 Installation Please be aware that this HIU can be installed with the ball valves at the top or bottom, the template must be positioned on the wall the correct way up to suit the installation. -
Page 8: Commissioning
Please ensure that all commissioning data is recorded on the check list supplied separately, one copy to be returned to Herz Valves UK Ltd and one copy to be left with the HIU. Failure to do so could invalidate the warranty. -
Page 9: Draining Down
4.0 Servicing 4.1 Draining down CAUTION: Servicing should only be carried out by a Herz approved service engineer. CAUTION: The district heating side of the HIU can be operated with high pressure and temperature systems. Please apply extreme caution and wear the appropriate safety equipment (PPE) when working on suspected leaks. - Page 10 Pressure temperature control valve Routine servicing – Check all connection seals, check central leakage hole which indicates the integrity of the O rings sealing the domestic side from the heating side, remove thermostatic head and check the insert for leaks and action the insert drive pin.
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Page 11: Fault Location Table
4.3 Fault Location Table Before attempting to locate faults on the Herz HIU please ensure the following: The primary flow temperature is correct The primary flow rate is correct There is sufficient primary pump pressure to allow circulation through the Heat Exchangers ... -
Page 12: Operating Data
5.1.1 Operating data Description Data Height 490mm (with ball valve cover 600mm) Height with heat meter display 737mm Width 400mm Depth 160mm Total unit weight 13.7kg Total unit weight with cover 17.7kg (with ball valve cover 18.8kg) Maximum DHW output 55kW (20 l/min) 42kW (15 l/min) Maximum primary supply temperature 90°C... -
Page 13: Spare Parts List
5.1.3 Spare Parts List Page 13... -
Page 14: Water Quality
Description Part No Insert Seals Part No DHW Heat Exchanger 1401847 1402045 Pressure Temperature Control valve 1400800 1402046 + 1402047 2 of each Thermostatic Head with contact sensor 1401965 Contact Sensor connection sealing nut 1401898 Strainer mesh 1401897 Primary Circulation Bypass Valve 1774691 1639091 1402045 + 1300101... -
Page 15: Dimensional Drawings
5.1.5 Dimensional Drawings Bottom entry version Top entry version Page 15... - Page 16 All specifications and statements within this brochure are according to information available at the time of printing and meant for informational purpose only. Herz Armaturen reserves the right to modify and change products as well as its technical specifications and/or it functioning according to technological progress and requirements.
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