Ferroli F 24 B Instructions For Installation, Use And Maintenance Manual page 18

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
18
Vertical Outlet
Ø mm Ø mm
60/100 80/125
3 m 12 m
4 m 12 m
1 m
0.5 m
0.5 m
0.25 m
Ferroli F 24 B
Roof end piece
1KWMA83U
Angled roof tile
1KWMA82U
1KWMA56U
010009X0
fig. 10c