845 Tech Manual.
1845 Tech Manual.qxd 23/11/05 1:21 pm Page 3 TECHNICAL DATA & INSTALLATION INSTRUCTIONS FOR EXCELSIOR DIRECT & INDIRECT UNVENTED WATER HEATERS WITH EXTERNAL EXPANSION TANK IMPORTANT NOTICE FOR INSTALLATION READ THESE INSTALLATION AND MAINTENANCE INSTRUCTIONS BEFORE COMMENCING UNVENTED CYLINDERS ARE DESIGNED TO BS STANDARD AND INSTALLED TO RELEVANT BUILDING REGULATIONS Fabdec Ltd is one of the worlds leading unvented water heater manufacturers.
1845 Tech Manual.qxd 23/11/05 1:21 pm Page 4 EXCELSIOR WATER HEATER SPECIFIERS GUIDE THE LAW AND UNVENTED THE BENEFITS OF EXCELSIOR UNVENTED WATER HEATERS It is legal to fit an Unvented Unit into any property. UK water byelaws were amended to allow this change. There is no ● Expansion vessel supplied longer a requirement to have an old-fashioned ● Annual inspection as per warranty “Tank-in-the-Roof” system.
1845 Tech Manual.qxd 23/11/05 1:22 pm Page 5 ● 1 Element on IDH indirect models up to 305 litres and 80 litre STANDARD ENERGY LOSSES DH direct model The heat loss of each Excelsior Unvented Unit while maintaining the temperature of the stored water at 65 degrees Celsius. (See performance table below). 1) Tests carried out by BBA. Slight variations may occur with changes to water mains supply pressure ● 2 Elements on DH direct models from 130 up to 305 litres.
1845 Tech Manual.qxd 23/11/05 1:22 pm Page 6 CONNECTING THE WATER SUPPLY DRAIN TAP ● Pipework is not supplied A drain tap to drain the unit must be fitted to the cold-water inlet ● All pipework should be installed using good plumbing practice. pipe somewhere between the Excelsior unit and the cold water valve assembly and at as low a level as possible, see fig. 1. We recommend 22mm mains cold water supply is used.
1845 Tech Manual.qxd 23/11/05 1:23 pm Page 7 SECONDARY CIRCULATION CONNECTION DIAGRAM Fig.3 2 * 2 PORT (S-PLAN) VALVE SYSTEM GUIDANCE LAYOUT ONLY Fig.
1845 Tech Manual.qxd 23/11/05 1:23 pm Page 8 2 PORT VALVE + 3 PORT MID POSITION VALVE (Y-PLAN) SYSTEM GUIDANCE LAYOUT ONLY Fig.5 WIRING As our heating element is Incoloy 825 and is fitted with a cut-out All electrical wiring should be carried out by a registered electrical and thermostat for safety, a non-standard 13/4" boss is fitted to the contractor and must conform to the latest IEE wiring regulations unit. Replacements can only be obtained from your authorised dealer or Fabdec Ltd.
1845 Tech Manual.qxd 23/11/05 1:24 pm Page 9 TUNDISH DRAINING The tundish supplied must be fitted visible to the occupier. The Switch off electrical power to immersion heaters and/or shut down discharge pipe must be 22mm copper pipe. Regulations do not the boiler. Close the stopcock valve to isolate the Excelsior unit. permit more than 3 x 90-degree bends between the Excelsior unit and the outflow.
1845 Tech Manual.qxd 23/11/05 1:24 pm Page 10 G3 REQUIREMENT areas etc. are acceptable providing that where children may ‘…there shall be precautions…to ensure that the hot water play or otherwise come into contact with discharges a wire discharged from safety devices is safely conveyed to where it is visible cage or similar guard is positioned to prevent contact, whilst but will not cause danger to persons in or about the building.’ maintaining visibility. iii) discharges at high level; e.
1845 Tech Manual.qxd 23/11/05 1:26 pm Page 11 TABLE 1 – SIZING OF COPPER DISCHARGE PIPE (D2) FOR COMMON T&P RELIEF VALVE SIZES Valve outlet Size Minimum size of discharge pipe D1 Minimum size of discharge pipe D2 from tundish G1/2 15mm G3/4 G1 22mm 28mm Maximum resistance allowed, expressed as a length of straight pipe (i.e. no elbows or bends) Resistance created by each elbow or bend 22mm up to 9m 0.8m 28mm up to 18m 1.0m 35mm up to 27m 1.4m 28mm up to 9m 1.0m 35mm up to 18m 1.
1845 Tech Manual.qxd 23/11/05 1:26 pm Page 12 GUARANTEE The Excelsior Duplex vessel carries a full 25-year cylinder guarantee against faulty materials or manufacture provided that: • It has been correctly installed as per the Installation Manual and all the relevant regulations and codes of practice in force at the time.
1845 Tech Manual.qxd 23/11/05 1:20 pm Page 1 UK Head Office Fabdec Ltd Grange Road Ellesmere Shropshire SY12 9DG UK Tel: + 44 (0) 1691 627200 Sales/Service Tel: + 44 (0) 1691 627210 Fax: + 44 (0) 1691 627222 Email: excelsior.sales@fabdec.com Website: www.fabdec.
