Baxi PRIME HT 240 Installers And Users Instructions page 12

Flue duct terminal
Coaxial Ø 60/100 mm
Vertical two-pipe
Horizontal two-pipe
... COAXIAL FLUE - AIR DUCT (CONCENTRIC)
This type of duct allows to disengage exhaust gases and to draw combustion air both outside the building and in case a
LAS flue is fitted.
The 90° coaxial bend allows to connect the boiler to a flue-air duct in any direction as it can rotate by 360°. It can moreo-
ver be used as a supplementary bend and be coupled with a coaxial duct or a 45° bend.
If the flue outlet is placed outside, the flue-air ducting must
protrude at least 18mm out of the wall to allow alluminium
weathering tile to be fitted and sealed to avoid water leaka-
ges.
Ensure a minimum downward slope of 1 cm towards the boi-
ler per each metre of duct length.
A 90° bend reduces the total duct length by 1 metre.
A 45° bend reduces the total duct length by 0.5 metre.
HORIZONTAL FLUE TERMINAL Ø 60/100 MM INSTALLATION OPTIONS
L max = 10 m
L max = 9 m
LAS FLUE DUCT Ø 60/100 MM INSTALLATION OPTIONS
Max. length Each 90° bend
of flue duct reduces the duct
max. length by
10 m 1 m
15 m 0,5 m
80 m 0,5 m
L max = 10 m
12
INSTRUCTIONS FOR THE INSTALLER
Each 45° bend Flue
reduces the duct terminal
max. length by diameter
0,5 m 100 mm
0,25 m 133 mm
0,25 m -
Concentric outlet
Figure 9
L max = 10 m
L max = 9 m
Outer
terminal
diameter
100 mm
80 mm
80 mm