Installation Of Flue And Air Ducts - Baxi Mainfour 240 F Manual Para El Usuario

16. INSTALLING THE FLUE AND AIR DUCTS
The boiler is easy and flexible to install thanks to the
extensive range of available accessories, as described
below. The boiler has been designed for connection to a
vertical or horizontal coaxial flue-air duct. A splitting kit is
also available if separate ducts are required.
Only accessories supplied by the manufacturer must
be used for installation!
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 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 bend combined with a coaxial duct or a 45° bend.
Connector
Figure 7
RESTRICTOR
Length (m)
0 ÷ 1
1 ÷ 5
INSTRUCTIONS FOR FITTERS
Flue
A
Yes
No
Figure 6
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. Make sure there is a minimum upward slope
towards the outside of 1 cm per metre of duct.
• a 90° bend reduces total duct length by 1 metre.
• a 45° bend reduces total duct length by 0.5 metres.
The first 90° bend is not included when calculating the
maximum available length.
9
926.527.2 - EN