De Dietrich MS 24 MI FF Notice D'installation, D'utilisation Et D'entretien page 77

16. INSTALLING THE FLUE AND AIR DUCTS
Model 24 MI FF - 24 FF
The boiler is easy and flexible to install thanks to the ex-
tensive 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 optimise operating safety, make sure
the flue ducts are firmly fixed to the wall with suitable
brackets.
... 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 curve 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 curve combined with a coaxial duct or a 45° curve.
Connector
Figure 7
Boiler model
24 MI FF
24 FF
INSTALLATION INSTRUCTIONS
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° curve reduces total duct length by 1 metre.
•
A 45° curve reduces total duct length by 0.5 metres.
The first 90° curve is not considered when calculating the
maximum available length.
Use of DIAPHRAGM
Length (m)
0 ÷ 1
1 ÷ 4
77
on INLET LINE
A
Yes
No
71.03982.03 - EN