m
WARNINGS
– The smoke flue and the connection to the flue pipe
must be in compliance with the national and local
Standards and Legislation in force.
– The use of rigid ducts which are resistant to tem-
perature, condensate, mechanical stress and are
air-tight is compulsory.
– Outlet ducts which are not isolated are a risk of
danger.
2.11.1 Coaxial duct
Coaxial accessories
Description
Code
Ø 60/100
mm
Ø 80/125
mm
Coaxial duct kit 8084811 8084830
Extension W. 1000 mm 8096103 8096130
Extension W. 500 mm 8096102 -
Vertical extension W. 200 mm with
smoke analysis take-off point
8086908 -
Adapter for Ø 80/125 mm - 8093120
Additional 90° curve 8095801 8095820
Additional 45° curve 8095900 8095920
Tile with joint 8091300 8091300
Roof outlet terminal W. 1284 mm 8091200 8091200
Vertical condensation recovery W. 200
mm
8092803 8092803
Load loss - Equivalent lengths
Model
Leq (linear metres)
Ø 60/100
mm
Ø 80/125
mm
90° curve 1 1
45° curve 0,5 0,8
Minimum-Maximum Lengths
Model
Duct Length Ø 60/100 Duct Length Ø 80/125
W Hori-
zontal (m)
H Vertical
(m)
W Hori-
zontal (m)
H Vertical
(m)
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Brava Slim
25 BF
- 3,5
1,3
(*)
5 3,5 6 4 7
Brava Slim
30 BF
- 3,0
1,3
(*)
5 3 6 4 7
m
CAUTION
(*) Vertical condensate recovery MUST be intro-
duced for vertical ducts (Type C32) or vertical sec-
tions of the duct (Type C42) longer than 1.3m.
Diaphragms for coaxial ducts
Boilers leave the factory equipped with a diaphragm (1) with
the following characteristics:
–
Brava Slim 25 BF
: diaphragm Ø 79 mm
–
Brava Slim 30 BF
: diaphragm Ø 81 mm.
1
Fig. 14
When the outlets are
Type C12
or
C42
the diaphragm is to be
removed or kept following the indications below:
Model Diaphragm for duct L
Brava Slim 25 BF
SI
(leave mounted)
< 1 m
Brava Slim 30 BF
Brava Slim 25 BF
NO
(remove it)
> 1 m
Brava Slim 30 BF
When the outlet is
Type C32
(vertically straight without any
curves), the presence of the diaphragm modifies the maxi-
mum length of the duct as shown below:
Model Diaphragm Max L (m)
Brava Slim 25 BF
SI 2,5
Brava Slim 25 BF
NO 5
Brava Slim 30 BF
SI 2,5
Brava Slim 30 BF
NO 5
2.11.2 Separate ducts (split pipe system Ø 80mm)
Constructing outlets for separate ducts indicates the use of
the "air-smoke split pipe system". This is to be ordered sep-
arately from the boiler and when connected to the other ac-
cessories, from those listed in the table below, completes the
smoke-outlet/ combustion air inlet assembly.
The total maximum length obtained from the length of the
outlet and inlet pipes is determined by the load loss of the in-
dividual accessories and must not be greater than 9 mm H
2O
for
Brava Slim 25 BF
and 9.5 mm H2O
Brava Slim 30 BF
.
Separate accessories
Description
Code
Diameter Ø 80 (mm)
Air-smoke split pipe system (with
take-off point) + Diaphragm
8093020
90° curve M-F (6 pieces) 8077410
90° curve M-F (with take-off point) 8077407
90° curve M-F (insulated) 8077408
Extension W. 1000 mm (6 pieces) 8077309
Extension W. 1000 mm (insulated) 8077306
Extension W. 500 mm (6 pieces) 8077308
Extension W. 135 mm (with take-off
point)
8077304
Wall outlet terminal 8089501
Internal and external ring nut kit 8091500
Inlet terminal 8089500
45° curve M-F (6 pieces) 8077411
Condensate recovery W. 135 mm 8092800
Manifold 8091400
Tile with joint 8091300
Roof outlet terminal W. 1390 mm 8091201
Condensate recovery Tee 8093300
Inlet/outlet fitting Ø 80/125 mm 8091401
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