Installation Of Flue And Air Ducts - Baxi LUNA 3 COMFORT MAX Installers And Users Instructions

15. installation of flue and air ducts

Models 250 Fi - 310 Fi
We guarantee ease and flex­ibility of installation for a gas-
fired forced draught boiler thanks to the fittings and fix­tures
supplied (described below).
The boiler is especially designed for connection to an
ex­haust flue / air ducting, with either coax­ial, vertical or
horizontal terminal. By means of a splitting kit a two-pipe
system may also be installed.
exclusively install fittings supplied by the manufac-
turer.
WarninG :
to guarantee more operating insurance it is necessary
to assure the flue pipes to the wall using the apposite
clamps.
... coaXial Flue - air Duct (concentric)
This type of duct allows to disengage ex­haust gases and to draw combustion air both outside the building and in case a
LAS flue is fitted.
The 90° coax­ial bend allows to connect the boiler to a flue-air duct in any direction as it can rotate by 360°. It can moreover
be used as a supplementary bend and be coupled with a coax­ial duct or a 45° bend.
securing clamp
B
A
concentric outlet
Figure 8
Boiler
Length (m)
model
MaX
250 Fi
MaX
310 Fi
instructions pertaininG to the installer
0 ÷ 1
1 ÷ 2
2 ÷ 5
0 ÷ 1
1 ÷ 2
2 ÷ 4
Figure 7
If the flue outlet is placed outside, the flue-air ducting must
protrude at least 18mm out of the wall to allow alluminium wea-
thering tile to be fitted and sealed to avoid water leakages.
Ensure a minimum downward slope of 1 cm towards the
outside per each metre of duct length.
• A 90° bend reduces the total duct length by 1 metre.
• A 45° bend reduces the total duct length by 0.5 me-
tre.
• The first 90° bend is not included in the maximum avai-
lable length.
air suction
restrictor
B
Yes
No
No
Yes
No
55
Flue
restrictor
a
Yes
No
No
Yes
No
No
925.480.1 - GB