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ENGLISH
INSTALLER
Coaxial flues (Ø 80/125)
An adapter kit must be used in order to install this size of
flue. Coaxial flues can be oriented in whatever direction
is most convenient for the room, provided the maximum
lengths specified alongside are respected.
b
Use only flues specifically designed for use with
condensing boilers. Follow the instructions pro-
vided in the flue pipe kit to install the flues.
Twin flues (Ø 80)
Twin flues can be oriented in whatever direction is most
convenient for the room.
b
Ensure that the flue gas vent pipe has a 1% slope
towards the boiler.
b
Use of flues longer than the maximum specified
alongside leads to a loss of heat output from the
boiler (see table alongside).
b
The boiler automatically adapts its ventilation sys-
tem to suit the type of installation and the length of
the flue. Never obstruct or partly choke the combu-
rent air intake pipe.
b
Use only flues specifically designed for use with
condensing boilers. Follow the instructions pro-
vided in the flue pipe kit to install the flues.
Unscrew the screws and remove the cover from the air
intake (A), and connect the comburent air pipe to it.
Connect the vent pipe to the flue gas outlet (B).
If the flue pipes used differ in length from those shown in
the table, make sure that the total length does not exceed
60 metres and that the maximum length of each individual
pipe section does not exceed 30 metres.
Maximum straight length of
coaxial flue Ø 80/125
(m)
Pressure drop
(m)
45° bend 90° bend
14,85
1,51
1,0
Maximum straight length of
twin flues Ø 80
(m)
Pressure drop
(m)
45° bend 90° bend
30 + 30
0,5
0,8
B
A
b
Maximum straight length is the maximum length of
the flue without bends, terminals or joints.
b
All lengths are referred to atmospheric pressure at
sea level.
b
Maximum straight length is the maximum length of
the flue without bends, terminals or joints.
b
All lengths are referred to atmospheric pressure at
sea level.
