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Split pipe system
The split pipe system is supplied with the combustion air inlet
diaphragm which is to be mounted, after the sections have been
eliminated according to the total load loss which is calculated
by summing the load losses of the inlet ducts to those of the
outlet ducts.
2
1
KEY:
Split pipe system with take-off point
1
Inlet diaphragm
2
Air inlet
3
Smoke outlet
4
Take-off point for smoke analysis
5
Load loss accessory Ø 80 mm
Description
Code
90° curve MF
8077410
45° curve MF
8077411
Horizontal exten-
8077309
sion W. 1000 mm
Vertical extension
8077309
W. 1000 mm
Wall terminal
8089501
Condensate recov-
8093300
ery Tee
Roof outlet termi-
8091200
nal (*)
(*) The losses of the roof outlet terminal at inlet include the
manifold code 8091400.
for the boiler to operate correctly it is necessary that a
NOTE:
minimum distance of 0.50 m of the duct is respected with a 90°
inlet curve.
Example: calculation of the load loss of a Brava One 25 BF boiler.
Accessories Ø 80
Code
mm
Extension W. 1000
8077309
mm (horizontal)
Extension W. 1000
8077309
mm (horizontal)
90° curve
8077410
90° curve
8077410
Wall terminal
8089501
TOTAL
3
4
5
Fig. 24
Load loss (mm H
O)
2
Brava One 25 BF
Brava One 30 BF
Inlet
Outlet
Inlet
Outlet
0,35
0,40
0,45
0,50
0,30
0,35
0,40
0,45
0,20
0,30
0,25
0,35
0,20
0,10
0,25
0,15
0,15
0,50
0,20
0,80
-
0,80
-
1,00
1,60
0,10
2,00
0,20
Load loss (mm H
O)
Quan-
2
tity
Inlet
Outlet
Total
7
7 x 0,2
-
1,40
7
-
7 x 0,3
2,10
2
2 x 0,35
-
0,70
2
-
2 x 0,4
0,80
2
0,15
0,5
0,65
5,65
(installation permitted since the total of the load loss of the ac-
cessories used is less than 9,0 mmH
With this total load loss, sections 1 to 6 (inclusive) must be re-
moved from the inlet diaphragm (2).
2
No. of sections to be
removed
Brava One 25 BF
None
1
1 ÷ 2
1 ÷ 3
1 ÷ 4
1 ÷ 5
1 ÷ 6
1 ÷ 7
1 ÷ 8
1 ÷ 9
1 ÷ 10
Entire diaphragm
(*) Maximum load loss permitted.
K
120
Description
K (mm)
W (mm)
O).
2
Fig. 25
Total load loss (mm H
O)
2
Brava One 30 BF
0 ÷ 2,0
0 ÷ 0,8
2,0 ÷ 3,0
0,8 ÷ 1,5
3,0 ÷ 4,0
1,5 ÷ 2,4
-
2,4 ÷ 3,2
4,0 ÷ 5,0
3,2 ÷ 4,0
-
4,0 ÷ 4,8
5,0 ÷ 6,0
4,8 ÷ 5,6
6,0 ÷ 7,0
5,6 ÷ 6,5
-
6,5 ÷ 7,3
7,0 ÷ 8,0
7,3 ÷ 7,8
-
7,8 ÷ 8,4
8.0 -
9.0
(*)
8.4 -
9.5
(*)
L
Fig. 26
Brava One 25 BF
Brava One 30 BF
203
221
400
450
67
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