115
IT
ES
PT
GB
RO
RUS
There is the possibility of doubling the air-
intake and smoke-outlet pipes and then brin-
ging them back together again so as to
obtain a concentric discharge by using the
doubler fitting (7 fig. 16).
In these cases, when assembling, recover
the silicone gasket used on the terminal
adapter, which is to be replaced by the dou-
bler, and insert it into the seat made in the
doubler.
For this type of discharge the sum of the
maximum rectilinear development allowed
for the pipes must not exceed 7.00 mm
H
2
O.
When calculating the lengths of pipe, take
Example of allowable installation calculation (
“25 BFT TS”
version) in that the sum of the
head losses of the single fittings is less than 7.00 mm H
2
O:
Inlet
Outlet
7 m horizontal pipe ø 80 x 0,20
1.40
–
7 m horizontal pipe ø 80 x 0,30
–2.10
n° 2 90° elbows ø 80 x 0,30
0.60
–
n° 2 90° elbows ø 80 x 0,40
–0.80
n° 1 terminal ø 80
0.10
0.30
Total head loss
2.10
+
3.20
=
5.3 mm H
2
O
With this total head loss, remove the ø 38 baffle from the intake pipe.
120
=
=
ø 80
16
0
KEY
1
Sponge-rubber gasket ø 125/95
2
Fixing screw
3
Air-smokes flow splitting unit
with take-off points
4
Sectores diaphragm ø 38
Fig. 13
Fig. 14
KEY
1
Air-smokes flow splitting unit
with take-off points code 8093000
2a 90° elbow MF code 807740 (6 pz.)
2b Isolated 90° elbow MF code 8077408
3a Extension L. 1000 code 8077309 (6 pz.)
3b Isolated extension L. 1000 code 8077306
3c Extension L. 500 code 8077308 (6 pz.)
4
Outlet terminal code 8089501
5
Int.-est. ring lit code 8091500
6
Intake terminal code 8089500
7
45° elbow MF code 8077411 (6 pz.)
8
Condensation outlet L. 135 code 8092800
9
Locking junction code 8092700 (5 pz.)
Sectores diaphragm
Total head loss
to remove
mm H
2
O
Pa
1
0 ÷ 1
0 ÷ 9,8
2
1 ÷ 1,8
9,8 ÷ 17,6
3
1,8 ÷ 2,4
17,6 ÷ 23,5
4
2,4 ÷ 3
23,5 ÷ 29,4
5
3 ÷ 3,6
29,4 ÷ 35,2
6
3,6 ÷ 4
35,2 ÷ 39,2
Remove diaphragm
4 ÷ 7
39,2 ÷ 68,6
Fig. 13/a
SECTOR OF DIAPHRAGM
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