67
EN
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.
1
2
4
5
3
Fig. 23
KEY:
1
Split pipe system with take-off point
2
Inlet diaphragm
3
Air inlet
4
Smoke outlet
5
Take-off point for smoke analysis
Load loss accessory Ø 80 mm
Descrip-
tion
Code
Load loss (mm H
2
O)
Brava Slim
25 BF
Brava Slim
30 BF
Brava Slim
40 BF
Inlet
Out
-
let
Inl
et
Out
-
le
t
Inlet
Out
-
let
90° curve
MF
8077410 0,35 0,40 0,45 0,50 0,70 1,50
45° curve
MF
8077411 0,30 0,35 0,40 0,45 0,60 1,00
Horizontal
extension
W. 1000
mm
8077309 0,20 0,30 0,25 0,35 0,40 0,65
Vertical
extension
W. 1000
mm
8077309 0,20 0,10 0,25 0,15 0,30 0,30
Wall
terminal
8089501 0,15 0,50 0,20 0,80 0,25 2,00
Con
-
densate
rec
overy
Tee
8093300 - 0,80 - 1,00 - 2,20
Roof outlet
terminal
(*)
8091200 1,60 0,10 2,00 0,20 4,00 0,40
(*) The losses of the roof outlet terminal at inlet include the man-
ifold code 8091400.
NOTE:
for the boiler to operate correctly it is necessary that a
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 Slim 25 BF
boiler.
Accessories Ø 80
mm
Code
Quan
-
tity
Load loss (mm H
2
O)
Inlet Outlet Total
Extension W. 1000
mm (horizontal)
8077309 7 7 x 0,2 - 1,40
Extension W. 1000
mm (horizontal)
8077309 7 - 7 x 0,3 2,10
90° curve 8077410 2 2 x 0,35 - 0,70
90° curve 8077410 2 - 2 x 0,4 0,80
Wall terminal 8089501 2 0,15 0,5 0,65
TOTAL 5,65
(installation permitted since the total of the load loss of the ac-
cessories used is less than 9,0 mmH
2
O).
With this total load loss, sections 1 to 6 (inclusive) must be re-
moved from the inlet diaphragm (2).
Fig. 24
No. of sec-
tions to be
removed
Total load loss (mm H
2
O)
Brava Slim 25 BF Brava Slim 30 BF Brava Slim 40 BF
None 0 ÷ 2,0 0 ÷ 0,8 -
1 2,0 ÷ 3,0 0,8 ÷ 1,5 -
1 ÷ 2 3,0 ÷ 4,0 1,5 ÷ 2,4 0 ÷ 2,0
1 ÷ 3 - 2,4 ÷ 3,2 -
1 ÷ 4 4,0 ÷ 5,0 3,2 ÷ 4,0 2,0 ÷ 4,0
1 ÷ 5 - 4,0 ÷ 4,8 4,0 ÷ 6,0
1 ÷ 6 5,0 ÷ 6,0 4,8 ÷ 5,6 6,0 ÷ 8,0
1 ÷ 7 6,0 ÷ 7,0 5,6 ÷ 6,5 8,0 ÷ 9,0
1 ÷ 8 - 6,5 ÷ 7,3 9,0 ÷ 11,0
1 ÷ 9 7,0 ÷ 8,0 7,3 ÷ 7,8 -
1 ÷ 10 - 7,8 ÷ 8,4 11,0 ÷ 13,0
Entire dia
-
phragm
8.0 -
9.0
(*) 8.4 -
9.5
(*) 13,0 ÷
15,0
(*)
(*) Maximum load loss permitted.
120
A
B
C
D
Ø 80
K
Fig. 25
Description
Brava Slim 25 BF Brava Slim 30 BF Brava Slim 40 BF
K (mm) 203 221 245
W (mm) 400 450 450
A (mm) 190 190 170
B (mm) 190 190 170
C (mm) 125 125 165
D (mm) 125 125 165
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