Immergas C9 Notice D'instructions page 11

Important: if the exhaust terminal and/or
extension concentric pipe needs shortening,
consider that the internal duct must always
protrude by 5 mm with respect to the external
duct and ensure to eliminate any "burr" caused
by cutting.
- Assemble the lid (A) complete with adapter (1)
and caps (6) onto the wall and assemble the
flue extraction elements to the ducting system.
A
B
The representation of the boiler is an example, as this kit adapts
to various boiler models and the installation possibilities are
different according according to the place where the same will be
installed.
Once all elements have been assembled correctly,
the exhaust flue gases will be expelled via the
ducting system, the combustion agent gas for
normal functioning of the boiler will be taken
in directly from the cavity (Fig. 3).
Technical data.
- The dimensions of the cavity must guarantee
a minimum gap between the external wall of
Ø 60 Rigid Ducting
(A) mm
66
A
C
CAVITY CAVITY
(B) mm (C) mm
106 126
Fig. 2
11
the duct and the internal wall of the cavity: 30
mm for cavity with circular section and 20 mm
for cavity with square section (Fig. 2).
- A maximum of 2 direction changes are allowed
on the vertical tract of the flue extraction
elements with a maximum angle of incidence
of 30° with respect to vertical.
- The maximum vertical extension using a Ø
60 ducting system is 22 m, the maximum
extension includes 1 Ø 60/100 bend at 90°, 1
m of Ø 60/100 pipe horizontally, 1 x 90° bend
Ø 60 ducted and the roof terminal for ducting.
To determine the C93 flue system in
configurations different to that just described
(Fig. 3), consider that 1 metre of ducted pipe
has a resistance factor of 4.9, according to the
indications described.
Fig. 3