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2.10 Flues
Arena is a type-C boiler with forced draught, the air inlet and the flue gas outlet must be connected to one
of the exhaust–intake systems indicated as follows. Using the tables and the methods of calculation
described, first verify, before installation, that the flues do not exceed the maximum allowed length.
2.11 Connection to concentric pipes
An aluminium "60/100 concentric adapter" is available for connecting the boiler to 60/100 mm concentric
pipes. The extreme ease of mounting and the use of double-lip gaskets in the couplings makes this solution
extremely advantageous and safe. Furthermore, an aluminium and plastic concentric kit is available for
discharge using 80/125 concentric pipes.
The total length in linear metres of the concentric pipes must not exceed the maximum length indicated in
the first table below. The second table shows the reductions to be used for any bends in the pipes, excluding
the initial one.
Arena 30 A
Reducers for concentric bends
90° concentric bend
45° concentric bend
For installation, connect the concentric kit directly to two diameter 80
bell-shaped reducers in the boilers, as indicated in Fig. 13. The
concentric kit can then be connected directly to a concentric bend
using a horizontal pipe or a concentric pipe in the vertical position.
18
Maximum allowable pipe length
Ø100/60 mm concentric
Vertical
Horizontal*
12 m
11 m
1 m
0,5 m
ARENA 30 A
Ø125/80 mm concentric
Vertical
Horizontal*
21 m
20 m
1KWMA35W
Fig. 13
Ø 100
Ø 60
1KWMA57W
1KWMA55Y
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