1
Configuration C
13(x)
Air/flue gas connection by means of concentric pipes to a
horizontal terminal (so-called forced flue).
2
Configuration C
33(x)
Air/flue gas connection by means of concentric pipes to a
vertical terminal (roof outlet).
3
Configuration C
93(x)
Air/flue gas connection by concentric pipes in the boiler
room and straight pipes in the chimney (rigid or flex)
(combustive air in counter current in the chimney).
C
63
type appliances have not been shown as
they are marketed without conduit systems.
When they are installed, these appliances end up
with a configuration similar to the ones shown for
the other C type appliances.
WARNING
4
Only factory components are authorised for
connecting the boiler and the terminal.
4
The clear section must comply with the
standard.
4
The chimney must be swept before the
installation of the evacuation conduit.
n
Lengths of the air/flue gas pipes
CAUTION
The maximum lengths (Lmax) given in the table are valid
for pipes on which the horizontatal sections do not exceed
one metre in total. For each additional metre of horizontal
pipe, a multiplication coefficient of 1.2 must be applied
when calculating the total length L. The total length L is
calculated by adding the lengths of the straight air/flue gas
pipes and the equivalent lengths of the other components.
Type of air/flue gas connection
Diameter
Maximum length in metres
Lmax (m)
AFC 18 AFC 24 AFC 30
C
13(x)
Concentric pipes connected to a horizontal
terminal
PPS (Flue gases)
Alu (Air)
80/125 mm (Rigid
duct)
8
8
8
C
33(x)
Concentric pipes connected to a vertical
terminal
PPS (Flue gases)
Alu (Air)
80/125 mm (Rigid
duct)
8
8
8
C
93(x)
Concentric pipes in the boiler room
Single conduits in the chimney (combustive air
in counter-current)
PPS (Flue gases)
Alu (Air)
80/125 mm
80 mm (Rigid duct)
18
18
18
80/125 mm
80 mm (Flexible
duct)
15
15
15
Minimum cross section for the air supply - Xmin. Square flue
mm
140
140
140
Round flue
mm
160
160
160
AFC 18 - AFC 24 - AFC 30
5. Installation
09/07/2015 - 300026439-07
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