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10 - INSTALLATION - Coaxial venting system
B = Connection fl ange
C = Fixing feet
D = Fixing screw
F = Coaxial vertical adaptor
Figure 26 - Installation of the coaxial fi tting
Figure 27 - Secure fi xing extensions and elbows together
10.1 - Coaxial
system
The boiler is not supplied with the
fi tting needed for connecting a coaxial
vent/combustion air system. A special
kit must be ordered to connect the
boiler with the Coaxial polypropylene
vent. Figure 26 shows how to install
the Coaxial fi tting above the boiler:
WARNING!!! Carefully follow
installation steps below, for the
coaxial pipe assembly (elbows and
extensions), as illustrated in fi gure
27. it is necessary to properly
insert the internal and external
pipe and mechanically secure
them by using a stainless steel self
tapping screw. Improper venting
can result in excessive levels of
carbon monoxide or a fi re, which
can result in severe personal injury
or death!
In particular:
1. slip-fi t the extension "1" and "2"
2. drill a suitable hole "3" with a drill
3. insert a suitable stainless steel self
34
(see fi gure 27) together;
"4" (see fi gure 27) in a position
where the two pipes "1" and "2" are
overlapped;
tapping screw "5" and tight it with a
screwdriver "6"
It is recommended that wall sleeve
be used when installing the coaxial
system through an exterior wall.
This will allow the system to be
easily slipped out for access during
routine maintenance.
Horizontal coaxial systems must
always be pitched by at least 1/4 in/
ft, (21 mm/m) towards the boiler.
The Coaxial system should extend
out of the wall to the dimensions
shown in fi gure 29.
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