76
is necessary to prevent burner failure in
starting.
In such cases, provide for a condensate-
collector system on the piping.
– With the outlet pipe outside the building
or in cold indoor environments, insulation
is necessary to prevent burner failure in
starting.
In such cases, provide for a condensate-
collector system on the piping.
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 7.00 mm H
2
O (vers. “25 BF
TS”) and 8.00 mm H
2
O (vers. “30 BF TS”).
For head losses in the fittings, refer to
Table 1
.
2.9.1
Separate pipe accessories
Kit code 8093000 is supplied for this pur-
pose (fig. 13).
The sectored diaphragm is to be used
according to the maximum head loss
allowed in both pipes, as given in fig. 14.
The complete range of accessories neces-
sary for satisfying all installation require-
ments is reported in fig. 15.
2.9.2
Separate-pipes roof outlet
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. 17.
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. 17).
In these cases, when assembling, recover
TABLE 1
Accessories ø 80
Head loss (mm H
2
O)
“25 BF TS”
version
“30 BF TS”
version
Inlet
Outlet
Roof outlet
Inlet
Outlet
Roof outlet
90° elbow MF
0,30
0,40
–
0,30
0,50
–
45° elbow MF
0,20
0,30
–
0,20
0,40
–
Extension L. 1000 (horizontal)
0,20
0,30
–
0,20
0,40
–
Extension L. 1000 (vertical)
0,30
0,20
–
0,30
0,30
–
Outlet terminal
–
0,30
–
–
0,40
–
Intake terminal
0,10
–
–
0,10
–
–
Doubler fitting
0,20
–
–
0,30
–
–
Roof outlet terminal L.1390
–
–
0,50
–
–
0,60
Tee condensation outlet
–
0,90
–
–
1,10
–
Example of allowable installation calculation (
“25 BF TS”
version) in that the sum of the
head losses of the single fittings is less than 7.00 mm H
2
O:
Intake
Outlet
7 meter horizontal pipe ø 80 x 0.20
1.40
–
7 meter vertical 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.
Fig. 13
120
=
=
ø 80
16
0
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
“25 BF TS”version
Sectores diaphragm
Total head loss
to remove
mm H
2
O
Pa
1
0 ÷ 1
0 ÷ 9.8
2
1 ÷ 2
9.8 ÷ 19.6
3
2 ÷ 3
19.6 ÷ 29.4
4
3 ÷ 3.8
29.4 ÷ 37.2
5
3.8 ÷ 4.6
37.2 ÷ 45.0
6
4.6 ÷ 5.4
45.0 ÷ 52.9
Remove diaphragm
5.4 ÷ 8
52.9 ÷ 78.4
“30 BF TS” version
Fig. 14
SECTOR OF DIAPHRAGM
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
Содержание Format 25 BF TS
Страница 1: ...IT ES PT GB CERTIFICAZIONE DEL SISTEMA DI QUALITA AZIENDALE Format ...
Страница 95: ......