Ariston microGENUS HE 24 MFFI, Installation And Servicing Instructions

Page: 18 / 72

18
For coaxial systems, the maximum development value,
mentioned in the table below also takes into account an
elbow.
For twin flue systems the maximum development value,
mentioned in the table includes the exhaust gas/air intake
terminal.
Type 5 outlets should respect the following instructions:
1- Use the same ø 80 mm flue pipes for the air intakes
and exhaust gas ducts.
2- If you need to insert elbows in the air intake and
exhaust gas ducts, you should consider for each one
the equivalent length to be included in the calculation
of developed length.
3- The exhaust gas duct should jut above the roof by at
least 0.5 m.
4- The intake and exhaust gas ducts in Type 5 must be
installed on the same wall, or where the exhaust is
vertical and the air intake horizontal, the terminals must
be on the same side of the building.
ø
1
0
0
60 mm
In the event that twin flue pipes are used, and the boiler
has a side clearance of less than 60mm from the wall, it
is necessary to cut a larger diameter hole for the flue
pipe, this should be ø10 cm, this will then allow for easier
assembly of the air intake elbow and the tube outside the
wall (see Fig. 2.20).
Fig. 2.20
In the event that the air intake and exhaust are run to the
left, it will be necessary to reduce the height of the air
intake by cutting 20mm from the base of the air intake
elbow (see Fig. 2.19)
Fig. 2.19
The flue restrictor is factory fitted in the exhaust manifold
on the boiler. Please refer to the table on page 19 to
determine whether it will be necessary to remove it.
To remove the restrictor it is simply necessary to lift the
restrictor from the exhuast manifold (Fig. 2.20A)
Fig. 2.20A