4
Configuration C
93
Air/flue gas connection by concentric pipes in the boiler
room and single "flex" in the chimney (combustive air in
counter current in the chimney)
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.
5
Configuration C
53
Air and flue gas connection separated by means of a bi-
flow adapter and single pipes (combustive air taken from
outside)
6
Configuration B
23
Connection to a chimney using a connection kit
(combustive air taken from the boiler room)
12
Configuration C
43
Air/flue gas connection to a collective conduit for
watertight boilers (3CE system)
4.8.2.
Lengths of the air/flue gas pipes
Type of air/flue gas connection
Diameter
Maximum length in metres
MCA 15 MCA 25 MCA 25/28
MI
C
13
Concentric pipes connected to a horizontal terminal Alu or PPS 60/100 mm
12.0
3.5
4.2
80/125 mm
12.3
23.0
25.7
C
33
Concentric pipes connected to a vertical terminal
Alu or PPS 60/100 mm
13.0
4.9
5.5
80/125 mm
10.7
21.0
23.6
C
93
Concentric pipes in the boiler room
Single conduits in the chimney (combustive air in
counter-current)
Alu or PPS 60/100 mm
60 mm (Rigid duct)
15.0
8.1
9.1
Concentric pipes in the boiler room
Flexible single conduit in the chimney
PPS
60/100 mm
80 mm (Flexible
duct)
9.9
20.0
22.7
C
53
Bi-flow adapter and separate single air/flue gas ducts
(combustive air taken from outside)
Alu
60/100 mm
2 x 80 mm
50.0
50.0
50.0
B
23
Chimney (rigid or flexible duct in furnace flue,
combustive air taken from the premises)
PPS
80 mm (Rigid duct)
50.0
50.0
50.0
80 mm (Flexible
duct)
45.0
45.0
45.0
WARNING
Maximum length = lengths of the straight air/flue gas ducts
+ equivalent lengths of other components
For the list of flue gas system accessories and the equivalent lengths,
refer to the current price list.
MCA 15 - MCA 25 MCA 25/28 MI
4. Installation
29/04/2010 - 300022146-001-B
27
