16
INDUSTRIE
FALCON
Fig. 17
Notes on concentric horizontal installation
To locate the centre of the hole for passing the pipes
through the wall, refer to fig. 13. 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 - flue gas duct must be
sealed with the gasket where they join the boiler (fig.
17). Outside, the pipes should protrude from the
wall between 10 and 60 mm (fig. 17).
Between
10-60mm
3.03.3 Maximum concentric flue length
First table below shows the maximum flue lengths available for boilers with concentric systems.
For correct calculation remember to include the reduction for bends on second table. Please refer to 3.02 for use of restrictor
Maximum flue lenght permissible
100 mm concentric
125 mm concentric
Vertical
Horizontal*
Vertical
Horizontal*
Falcon
4 m
3 m
5 m
5 m
Reduction for bend
100 mm concentric bend 90°
1 m
100 mm concentric bend 45°
0,5 m
125 mm concentric bend 90°
0,5 m
125 mm concentric bend 45°
0,25 m
*For horizontal Flueing the reduction for appliance bend or turret are already included.
2
1
3
max. 3 m
2
1
max. 4 m
4
3
Fig. 18a
Fig. 18b
