Installation Of Flue And Air Ducts - Baxi LUNA3COMFORT Installers And Users Instructions

15. INSTALLATION OF FLUE AND AIR DUCTS

Models 240 Fi - 310 Fi - 1.240 Fi - 1.310 Fi
We guarantee ease and flexibility of instal lation 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.
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
0 ÷ 1
240 Fi
1 ÷ 2
1.240 Fi
2 ÷ 5
0 ÷ 1
310 Fi
1 ÷ 2
1.310 Fi
2 ÷ 4
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.
Air suction Flue
RESTRICTOR RESTRICTOR
B A
Yes
Yes
No
No No
No Yes
Yes No
No No
16
Figure 7
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.
925.220.4 - EN