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Installation Instructions
Alpha Twin Pipe Flue Systems
Suitable for use with the
Alpha CB 24/28, C and SY range of gas fired
combination boilers
after Boiler Serial No. B04500001
For Technical help or for Service call ...
ALPHA HELPLINE
Tel: 0870 3001964
Nepicar House, London Road,
Wrotham Heath, Sevenoaks,
Kent TN15 7RS
These instructions must be read in conjunction with the Installation instructions supplied with the boiler.
Only flue components supplied by Alpha may be used with Alpha boilers, failure to comply will invalidate
the boiler's warranty and CE approval, and may be unsafe.
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Summary of Contents for Alpha Alpha Twin Pipe Flue Systems
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Page 1: Installation Instructions
These instructions must be read in conjunction with the Installation instructions supplied with the boiler. Only flue components supplied by Alpha may be used with Alpha boilers, failure to comply will invalidate the boiler's warranty and CE approval, and may be unsafe. - Page 2 The flue system must be installed in accordance with BS 5440:1. The boiler must be installed in accordance with the Installation and Servicing instructions supplied with the boiler. The maximum equivalent flue lengths are as given below. (Refer to illustrations in section 3). Alpha Boiler CB/SY range Horizontal Flue 10 m Vertical Flue (Inc.
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Page 3: Flue Options
FLUE OPTIONS HORIZONTAL FLUE OPTIONS - Lmax = 10 m L = Equivalent length of flue or air duct (a 90° bend is equivalent to 1.0 m of flue length and a 45° bend is equivalent to 0.5 m of flue length). Note: No more than four bends (90°... - Page 4 VERTICAL FLUE OPTION - Flat or pitched roof The vertical flue terminal is equivalent to 1 m of flue length. Note: A 90° bend must not be used with a vertical flue. No more than four bends (90° or 45°) must be used on the flue exhaust or air inlet duct. Fig.
- Page 5 INSTALLATION INSTALL THE BOILER Mount the boiler on the wall and connect the pipework as described in the Installation and Servicing instructions supplied with the boiler. CONVERT THE BOILER (see Fig. 5) Modify the top of the boiler to enable a 2-pipe flue system to be connected using conversion kit 6.1000368 as follows:- Place the flue duct adaptor in position onto the boiler flue adaptor and secure with the clamp and seal.
- Page 6 ASSEMBLE THE FLUE DUCTS Particular site conditions will dictate the sequence in which the flue is assembled. However, start assembling the flue system at the boiler noting the following:- Cut 85 mm holes for plain flue/air ducts. Cut 100 mm holes for flue/air ducts with connection sockets. Note: All parts of the flue duct must be at least 25 mm from combustible material.
- Page 7 Fit a weathering slate, suitable for a 125 mm outside diameter flue, over the hole in the roof. A suitable weathering slate is available from Alpha Therm Ltd. v) Fit the terminal assembly into the weathering slate and place it in position, ensuring the minimum distances given in Fig.
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Page 8: Flue Terminal Location
These instructions have been carefully prepared but we reserve the right to Nepicar House, London Road, Wrotham Heath, alter the specification at any time in the interest of product improvement. Sevenoaks, Kent TN15 7RS © Alpha Therm Limited 2004. Tel: 0870 3001964 email: info@alphatherm.co.uk website: www.alpha-innovation.co.uk Part No.
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