Ferroli MAXIMA 35 C Instructions For Use, Installation And Maintenance page 19

Maxima 35 C
4. If necessary, cut the end pipe to size, ensuring that the external pipe protrudes from the wall by
between 10 and 60 mm (Fig. 9a and 9b). Remove the cutting burrs.
5. Connect the flue to the boiler, positioning the seals correctly. Seal the flue into the wall with silicone
or sand + cement and cover with wall seals provided.
Flue seals should be lubricated with a silicone type grease to prevent damage (grease
not supplied)
The total length in equivalent metres of the
concentric flue must not exceed the maximum
lengths stated in the following table, note that
each bend gives rise to the stated reduction.
For example, a duct = 60/100 composed of 1
bend of 90° +1 horizontal metre + 2 bends of
45° + 1 horizontal metre has a total equivalent
length of 4 metres.
Table 2a
Maximum permissible
duct length (Horizontal)
Maximum permissible
duct length (vertical)
Table 2b
Reduction factors for bends
Concentric bend at 90° - Ø 60/100 mm
Concentric bend at 45° - Ø 60/100 mm
Concentric bend at 90° - Ø 80/125 mm
Concentric bend at 45° - Ø 80/125 mm
Vertical Outlet
Angled roof tile
Ø mm Ø mm
60/100 80/125
5 m 12 m
6 m 12 m
1 m
0.5 m
0.5 m
0.25 m
Roof end piece
1KWMA83U
1KWMA82U
1KWMA56U
240 240
fig. 9c
1KWMA71W
19