24
25
Overhanging parts
Installation in a façade
External vents - Illustration
Corners
fi g. 19
2m - in public places
0,4m - in other places
- zone where external vents
can be instaled
Standard set
Coaxial
elbow 90°
Coaxial duct
Standard set
A Outside casing – air part
B Inside casing – fl ue gas part
C Collar and clip
D Elbow with fl ange
E Sealing
F Bolts
G Outer sealing ring (rubber)
I Inner sealing ring (plastic)
J O-ring
• Apply the seal (E) to the bottom part of
the elbow (D);
• Carefully insert the O-rings (J) into the
upper and lower parts inside the elbow;
• Attach the elbow to the boiler – be careful
to con nect the inside part to the boiler’s
outlet properly;
• Put the rubber sealing ring (G) on the air
duct (A);
• Push the completed duct section through
the wall opening so that the (G) ring is
aligned with the outside surface of the
wall;
• Place the collar and clip onto the duct and
elbow; check proper sealing of both inside
and outside sections of the duct;
Note: The maximum horizontal length is 1
elbow plus 3 m (4 equivalent metres) – if
the horizontal route’s equivalent length is
more than 2 m, the diffuser (R) must be
removed from the fan (see Fig. 15 ).
• Secure the elbow’s flange using the
bolts;
Note: If you have to shorten the straight
part, always cut the same length from
both the outside and inside elements.
Always cut at the end opposite to the
external vent.
Example accessories:
Horizontal set 1 m
Horizontal set 0.75 m
Coaxial extension duct (1 m)
Coaxial elbow 90°
Example of horizontal double-duct fl ue
fi g. 20
Horizontal flue - Illustration
