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• Concentric extension pipes and plug-in
type seal for elbows. To connect the
possible extension connections of the
waste gas chimneys to other elements
of chimneys: connect the male (straight)
side of concentric pipe or concentric
elbow to the female side (sealed side) of
the previous part, in this case make sure
you have fitted the required washer, so
the connection will be tight and integrity
of parts of the set will be ensured.
Please note that in the case
where shortening of the
discharge chimney and/or
extension is required, the inner chimney
must always be 5 mm ahead of the outer
pipe..
For safety reasons, the
absorption/ discharge chimney
of the boiler should not be
blocked, even if for short-time or
temporarily.
During installation of the
horizontal pipes, the pipe tilt
must be kept upwardly a
minimum of 3%, dowelled in every 3m
and a retaining clamp must be used.
1. 90° elbow
2. Sealing gasket
3. Sealing gasket
4. Centring wire
5. Exterior chimney pipe
6. Inner wall blind flange
7. Outer wall blind flange
8. Interior chimney pipe
9. 60 Sealing gasket
10. Protection cage
11. Flange gasket
12. Flange connecting screws
13. Control measurement
stopper
14. Fresh air control cover
Figure 2.4
Ø80/125 mm Concentric Chimney Set
The total length of the
concentric chimney set
must not exceed 10m
horizontally with a single elbow.
In additions, this total length is
reduced by 1 m for each 90° elbow
use and 0.5m for each 45° elbow
use. Up to 3 90° elbow can be used.
a- Horizontal Chimney Set Elbow (90°)
b-Chimney Extension Pipe
c- Additional 90° Elbow
d-Horizontal Chimney Set Pipe
Figure 2.8
II. Two 90° cantilever sample
chimney installation
d
a
b
c
Ø100/150 mm
a + b + c + d < 19 m = (Viwa 90)
19 m = (Viwa 115)
18 m = (Viwa 125)
10 m = (Viwa 150)
3
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Figure 2.7
Condensed boiler chimney tilt
Figure 2.6
Combi concentric chimney wall outlet for hermetic use.
Figure 2.5
Installation of chimney set parts
