FALCON II
15
Fig. 16
Notes on concentric horizontal installa-
tion
To locate the centre of the hole for passing the
pipes through the wall, refer to fig. 12. 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. 16). Outside, the
pipes should protrude from the wall between 10
and 60 mm (fig. 16).
Between
10-60mm
3.03.3 Maximum concentric fl ue 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
*For horizontal Flueing the reduction for appliance bend or turret are already included.
max. 3 m
max. 4 m
Fig. 17a
Fig. 17b
