Baxi LUNA3 SYSTEM HT 1.180 MP Installers And Users Instructions page 49

... coaxial flue - air duct (concentric)
This type of duct allows to disengage exhaust gases and to draw com-
bustion 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 supple-
mentary 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 weathering 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.
concentric outlet
A 45° bend reduces the total duct length by 0.5 metre.
Figure 10
14.1 horIzontal flue termInal Ø 60/100 mm InstallatIon optIons
L max = 10 m
L max = 10 m
L max = 9 m
L max = 9 m
14.2 las flue DuCt Ø 60/100 mm InstallatIon optIons
L max = 10 m
InstructIons pertaInInG to the InstaLLer 925.916.2 - GB
49