Ferroli F24 Installation, Service And User Instructions Manual page 15

Notes on concentric horizontal installation
To locate the centre of the hole for passing the
pipes through the wall, refer to fi g. 13b. Bear in
mind that the two concentric pipes must slope
downwards away from the boiler at a rate of
about 3 mm/m to avoid rainwater entering the
boiler. The concentric pipes making up the air
- fl ue gas duct must be sealed with the gasket
where they join the boiler (fi g. 17). Outside, the
pipes should protrude from the wall between 10
and 60 mm (fi g. 17).
3.03.3 Maximum concentric fl ue length
irst table below shows the ma imum fl ue lengths available for boilers with concentric systems.
or correct calculation remember to include the reduction for bends on second table.
3.0 for use of restrictor.
Maximum flue lenght permissible
Ferroli F24
or horizontal lueing the re uction or a
Reduction for bend
100 mm concentric bend 90°
100 mm concentric bend 45°
125 mm concentric bend 90°
125 mm concentric bend 45°
1
Fig. 7
100 mm concentric
Vertical Horizontal*
4 m 3 m
liance en or turret are alrea
1 m
0,5 m
0,5 m
0,25 m
max. 3 m
concentric
100/60
18a
Fig.
125 mm concentric
Vertical Horizontal*
5 m 5 m
inclu e .
Between
10-60mm
lease refer to
concentric
100/60
b
18
Fig.
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