Alpha CB Boiler Installation Instructions

Installation Instructions
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

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.
L = B + C + 185 mm
Front
Alpha CB/C/SY Boiler
KIT CONTENTS
(The flue terminal is supplied with the boiler)
Lmax = equivalent flue length of 4 m (except C23/27, Lmax = 3 m)
B
C
Fig. 1 - Horizontal side flue options
L = B + C + E + 185 mm
E
Front
B
C