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7105764.02 (1-11/12)
10.1 CONCENTRIC DUCTS
This type of duct is used to discharge exhaust fumes and draw
combustion air both outside the building and if a LAS flue is
fitted. The 90° coaxial bend allows the boiler to be connected
to a flue-air duct in any direction as it can be rotated by 360° It
can also be used as a supplementary curve combined with a
coaxial duct or a 45° curve.
If fumes are discharged outside the building, the flue-air duct
must protrude at least 18 mm from the wall to allow an alu
-
minium weathering surround to be fitted and sealed to avoid
water infiltrations.
•
A 90° bend reduces the total duct length by 1 metre.
•
A 45° bend reduces the total duct length by 0.5 metres.
•
The first 90° bend is not included when calculating the maximum available length.
Make sure there is a minimum downward slope of 1 cm per metre of duct towards the boiler.
SOME OUTLET DUCT INSTALLATION EXAMPLES AND THEIR RELATIVE MAXIMUM LENGTHS ARE SHOWN IN ANNEX
“SECTION” D
AT THE END OF THIS MANUAL.
10.2 SEPARATE DUCTS
This type of installation makes it possible to discharge exhaust
fumes both outside the building and into single flue ducts.
Comburent air can be drawn in at a different location from that
of the flue terminal. The accessory splitting kit comprises a flue
duct adaptor (80) (
B
) and an air duct adaptor (
A
). For the air
duct adaptor, fit the screws and seals previously removed from
the cap.
The 90° bend is used to connect the boiler to the inlet and
outlet ducts, adapting them to various requirements. It can also
be used as a supplementary curve combined with a duct or a
45° bend.
•
A 90° bend reduces the total duct length by 0.5 metres.
•
A 45° bend reduces the total duct length by 0.25 metres.
•
The first 90° bend is not included when calculating the maximum available length.
SINGLE SPLITTING KIT
(ALTERNATIVE ACCESSORY)
For special installations of the fumes inlet/outlet ducts, the sin-
gle splitting kit (
C
), supplied as an accessory, can be used.
This accessory, in fact, can be used to move the inlet and out-
let in any direction. This type of installation makes it possible
to discharge exhaust fumes both outside the building and into
single flue ducts. Comburent air can be drawn in at a different
location from that of the flue terminal. The splitting kit is fixed
to the boiler turret (100/60 mm) and allows the comburent air
and outlet fumes to enter/leave the two separate ducts (80
mm). For further information, read the assembly instructions
supplied with the accessory.
SOME OUTLET DUCT INSTALLATION EXAMPLES AND THEIR RELATIVE MAXIMUM LENGTHS ARE SHOWN IN ANNEX
“SECTION” D
AT THE END OF THIS MANUAL.
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