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Alpha CD Installation Instructions

Cd ridge flue terminal assembly (kit part no. 6.2000530 - copper brown colour) (kit part no. 6.2000540 - grey brown colour)
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Installation Instructions

CD Ridge Flue Terminal Assembly
(Kit Part No. 6.2000530 - Copper Brown colour)
(Kit Part No. 6.2000540 - Grey Brown colour)
Only for use with an Alpha CD/HE Condensing Boiler
with an Alpha CD Concentric (60/100) Flue System

1. GENERAL

Note: The CD Ridge flue terminal MUST ONLY be used with an Alpha CD or HE condensing boiler.
a.
The flue system must be installed in accordance with BS 5440:1.
b.
The boiler must be installed in accordance with the Installation instructions supplied with the CD/HE boiler.
c.
The Ridge flue terminal assembly is equivalent to a 3 m length of flue.
d.
Each 45° bend is equivalent to a 0.9 m length of flue.
Note: It is recommended not to use a 90° bend with the vertical flue.
e.
Refer to the vertical flue options (Fig. 1) and ensure the flue length does not exceed the equivalent of 15 m for a
CD boiler (including the terminal assembly) or 6 m for an HE boiler (including the terminal assembly).
f.
Additional flue lengths of 0.75 m and 1.0 m are available for extending the flue up to the maximum equivalent flue
length.
g.
To determine the actual length of flue required, measure the distance from the top of the boiler side panel to the
ridge position (H) and subtract approximately 350 mm for the terminal assembly (see Fig. 1).
h.
The Ridge flue terminal has been designed predominantly for use in new build situations where roof construction
allows the terminal to be accomodated without alterations to the roof structure.
In retrofit installations roofing materials will need to be removed/replaced and the roof structure may require
alterations to accommodate the passage of the flue system.
Note: Any work of this nature should be carried out by a competent person and the integrity of the roof structure
should never be compromised.
i.
The Ridge flue terminal replaces a 450 mm ridge tile. Positioning at the ridge should be in accordance with the
current Building Regulations. Cut any roofing felt/boarding as necessary to allow for the entry of the throat
section of the terminal (50 mm) to pass directly into the roof space. A clearance of 25 mm from combustible
materials must be maintained.
KIT CONTENTS

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  • Page 1: Installation Instructions

    KIT CONTENTS 1. GENERAL Note: The CD Ridge flue terminal MUST ONLY be used with an Alpha CD or HE condensing boiler. The flue system must be installed in accordance with BS 5440:1. The boiler must be installed in accordance with the Installation instructions supplied with the CD/HE boiler.
  • Page 2 Always ensure joints are fully sealed and the integrity of the roofing system is maintained. H Max = CD 12 m H Max = CD 10.2 m HE 3 m HE 1.2 m Note: Always remove the flue restrictor when using the Alpha HE boiler Fig. 1 Ridge Flue Terminal Kit - 2...
  • Page 3 2. INSTALLATION When the template is on the wall in the boiler position, continue the vertical line from the centre of the flue hole up to the roof/ceiling position. Mark the centre position of the flue hole from this line as shown in Fig.
  • Page 4 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 2005. Tel: 0870 3001964 email: info@alphatherm.co.uk website: www.alpha-boilers.com Part No.

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