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IT
ES
PT
GB
2.5.3
Coaxial duct outlet on the roof
The accessories to be used for this type of
installation and some of the connecting
systems that may be adopted are illustra-
ted in fig. 7.
It is possible to insert up to a maximum of
three extensions and reach a maximum
rectilinear distance of 3.7 meter.
Should it be necessary to make two chan-
ges of direction in the pipe development,
the maximum length of the pipe must not
exceed 2 meter.
2.6
SEPARATE PIPES ø 80
A special kit may be used to separate the
flue gas outlet from the fresh air intake.
The intake may be installed to the right or
left of the flue gas outlet.
Both ducts may be oriented in any direction.
Refer to fig. 8 for positioning.
The maximum overall length of the intake
and exhaust ducts depends on the head
losses of the single fittings installed
(excluding the doublers) and must not be
greater than 15,5 mm H
2
O.
For head losses in the fittings, refer to
Table 2
.
2.6.1
Separate pipe accessories
Kit code 8089911 is supplied for this pur-
pose (fig. 9).
The sectored diaphragm is to be used
according to the maximum head loss
allowed in both pipes, as given in fig. 10.
KEY
1
Blind flange
2
Flue gas duct flange
3
Fixing screw
4
Gasket ø 125/95
5
Intake duct collar
Fig. 9
100
Fig. 7
15
5
Ø 80
Ø 80
10
5
P
L
CA
K
Z
CS
KEY
CA
Inlet
CS
Outlet
Example of allowable installation calculation in that the sum of the head losses of the
single fittings is less than 15,5 mm H
2
O:
Inlet
Outlet
7 m horizontal pipe ø 80 x 0,20
1,40
–
7 m horizontal pipe ø 80 x 0,40
–2,80
n° 2 90° elbows ø 80 x 0,30
0,60
–
n° 2 90° elbows ø 80 x 0,50
–1,00
n° 1 terminal ø 80
0,10
0,40
Total head loss
2,10
+
4,20
=
6,3 mm H
2
O
TABLE 2
Accessories ø 80
Total head loss (mm H
2
O)
DEWY
Inlet
Outlet
Roof outlet
90° elbow MF
0,30
0,50
–
45° elbow MF
0,20
0,40
–
Extension L. 1000 (horizontal)
0,20
0,40
–
Extension L. 1000 (vertical))
0,30
0,30
–
Outlet terminal
–0,40
–
Inlet terminal
0,10
––
Doubler fitting
0,30
––
Roof outlet terminal L.1381
––
0,60
Fig. 8
1
2
3
4
5
3
30/80
30/130
K mm
215
348
L mm
130
263
P mm
245
230
Z mm
330
315
KEY
1
Vertical extension L. 140 with take-off points code 8086950
2a Extension L. 1000 code 8096150
2b Extension L. 500 code 8096151
3
Tile with articulation joint code 8091300
4
Roof outlet terminal L. 1285 code 8091205
5
Supplementary 90° elbow code 8095850
6
Supplementary 45° elbow code 8095950
NOTE
Before connecting accessories, it is
always advisable to lubricate the
internal part of the gaskets with
silicon products. Avoid using oils
and greases.
Содержание DEWY 30/130
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