Alpha Alpha CB Boiler Manuel utilisateur

Installation Instructions

KIT CONTENTS

(The flue terminal is supplied with the boiler)

1. GENERAL

a. The flue system must be installed in accordance with BS 5440:1;1990.

b. The boiler must be installed in accordance with the Installation instructions supplied with the boiler.

c. The flue assembly supplied for the boiler is effectively 0.75 m in length for the 750 mm extension and 1.0 m for the

1000 mm extension.

Note: Additional flues (of the same length) are available to extend the flue up to a maximum equivalent flue length of 4 m, or

3 metre when fitted to an Alpha C23/27.

d. For vertical flue applications refer to separate instructions.

e. For horizontal flue applications ensure that there is a slight downward slope towards the terminal.

f. Use the following methods to determine the correct length of horizontal flue required:-

For rear exit flue L = B + 175 mm

For side exit flue L = B + C + 185 mm (min. side clearance required is 5 mm)

Where L = Required length of flue

B = Finished wall thickness

C = Distance from inside wall to the side of the boiler

g. Note: For rear or side flue, cut a 110 mm diameter hole (or use a 107 mm core drill) in the wall for the flue assembly.

h. Refer to the flue options and ensure the flue length does not exceed the maximum equivalent length of 4 metre, or

3 metre when fitted to an Alpha C23/27.

Fig. 1 - Horizontal side flue options

L = B + C + E + 185 mm

L = B + C + 185 mm

Front

Lmax = equivalent flue length of 4 m (except C23/27, Lmax = 3 m)

Alpha CB/C/SY Boiler

750 and 1000 mm Flue Extensions

Concentric (60/100) Flue System

Kit Part No. 6.1000320 - 750 mm extension

Kit Part No. 6.1000322 - 1000 mm extension

04/04/D131

Part No. 6.9174342

Fig. 3 - Side flue

2. CUTTING THE FLUE DUCTS TO LENGTH

Refer to the Installation and Servicing instructions supplied with the boiler.

The following procedure applies to both rear or side exit flue. The only difference being the lengths to which the ducts are cut.

Rear flue Outer air duct length = finished wall thickness + 135 mm

Inner flue duct length = finished wall thickness + 172 mm

Side flue Outer air duct length = finished wall thickness + the distance from the inside wall to the side of the

boiler + 145 mm

Inner flue duct length = finished wall thickness + the distance from the inside wall to the side of the

boiler + 182 mm

If the overall length of the inner duct is greater than 790 or 1040 mm, then another flue extension is required.

Note: When cutting the flue ducts ensure that all cuts are square and burr free.

Note: If flue is more

than 1.5 m, the

restrictor must be

removed.

Fig. 2 - Rear flue

Compiled and designed by Publications 2000, Tel (01670) 356211

These guidelines 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.

Nepicar House,LondonRoad, Wrotham Heath,

Sevenoaks, Kent TN15 7RS

Technical Helpline: 0870 3001 964

email: info@alphatherm.co.uk

website: www.alpha-innovation.co.uk

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