Installation - Alpha CB Boiler Installation Instructions

H = Equivalent length of flue or air duct
The Vertical terminal assembly is equivalent to 1.0 m of flue length and each 45° bend is equivalent to 0.5 m of flue length.
Note: 90° bends must not be used with the vertical flue.

2. INSTALLATION

Refer to the Twin Pipe Flue installation instructions supplied with the boiler conversion kit (Part No. 6.1000368).
a. Refer to Fig. 1 for positioning of the vertical terminal in the roof.
b. To enable direct connection of the flue and air ducts to the terminal the duct centres must be 120 mm apart.
c. At the required position cut a hole and/or remove tiles so that there is at least a 170 mm diameter hole in the roof.
Ensure there is at least a 25 mm gap between the outer duct and any combustible material.
d. Fit a weathering slate, suitable for a 125 mm outside diameter flue, over the hole in the roof. A suitable weathering
slate (Part No. 6.1000380) is available from Alpha Therm Ltd.
e. Fit the terminal assembly into the weathering slate and place it in position, ensuring the minimum distances given in
Fig. 1 are maintained.
f. After assembly of the ducts to the terminal, ensure it is not possible to disengage any part of the flue assembly.
Check that the weathering slate is fitted correctly and ensure that the flue assembly is supported at roof level using
suitable brackets.
Alpha Therm Limited.
Nepicar House, London Road, Wrotham Heath,
Sevenoaks, Kent TN15 7RS
Tel: 0870 3001 964
email: info@alphatherm.co.uk
website: www.alpha-innovation.co.uk
Compiled and designed by Publications 2000, Tel (01670) 356211
Fig. 1
These instructions have been carefully prepared but we reserve the right to
alter the specification at any time in the interest of product improvement.
© Alpha Therm Limited 2004.
08/04/D131