Alpha CB Boiler Installation Instructions

Installation Instructions

Vertical Flue Terminal Assembly
Twin Pipe (80 mm) Flue System

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 and the twin
pipe flue instructions supplied with the boiler conversion kit.
c. The vertical flue terminal assembly is equivalent to 1.0 m of flue length.
d. Refer to the vertical flue options in Fig. 1 and ensure that the flue length (H) does not exceed the equivalent of
7.0 m.
e. Each 45° bend is equivalent to 0.5 m of length of flue and no more than four bends must be used in each flue
exhaust or air inlet duct.
Note: 90° bends must not be used with the vertical flue.
f. Additional flue/air ducting is available in 1.0 m lengths for extending the flue up to a maximum equivalent flue
length of 7.0 m.
g. The vertical terminal may be connected directly to the boiler via the conversion kit. However, under no
circumstances must the terminal be shortened in length.
h. To determine the total length (A) of flue/air ducting required (refer to Fig. 1).
Measure the distance (X) from the top of the boiler side panel to the weathering slate position and subtract 640
mm for the terminal assembly, i.e. C = X - 640 mm
A = 2 x C + (50 mm for each connection in straight ducting).
Alpha CB/C/SY Boiler
(Kit Part No. 6.1000369)
KIT CONTENTS