Baxi Luna 3 Comfort, Installers And Users Instructions

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54
926.427.1 - GB inStructionS Pertaining to the inStaller
15. installation of flue and air ducts
Models 240 Fi - 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.
Figure 7
0503_0905/
c
G1638
Figure 8
… 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.
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.
securing clamp
concentric outlet
A
B
Boiler
model
250 Fi
310 Fi
0 ÷ 1
1 ÷ 2
2 ÷ 5
0 ÷ 1
1 ÷ 2
2 ÷ 4
Length (m)
air suction
restrictor
B
Yes
No
No
Yes
No
Flue
restrictor
a
Yes
No
No
Yes
No
No
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