Flues Connections - Ferroli SYS 10-23 Installation, Maintenance And User Instruction

2.6 Flues connections

This is a "type C" sealed and forced draught appliance, and as such the air inlet and flue gas outlet must
be connected to one of the exhaust/intake systems indicated below. Using the tables and the methods of
calculation described, first verify, before installation, that the flues do not exceed the maximum allowed
length. The standards in force and local legislation must be adhered to for terminal positions.
Restrictors
For the correct operation of the boiler, the restrictors supplied with the appliance must be fitted, accord-
ing to the indications shown in the tables below. These tables apply for both vertical and horizontal
applications.
Choice of the restrictors using con-
centric flue
Table 4a
Type Length up to:
1 bend + 1 metre
60/100
1 bend + 3 metres
1 bend + 3 metres
80/125
1 bend + 4 metres
1 bend + 5 metres
Replacing the restrictor
To install or change the restrictor, remove the fan
unit, remove the flue gas connecting pipe 1 (as
shown in Fig. 9a) and insert the restrictor 2 (as
shown in Fig. 9b).
N.B: The diameter of the
hole is stamped on
the restrictor
The Ø45 SYS restrictor is fitted as standard on
the boilers. Before inserting the flue gas outlet
pipe, check that the correct restrictor is installed
(when this needs to be used) and correctly posi-
tioned.
14
Restrictor to be used
50 mm
No restrictor
45 mm
50 mm
No restrictor
Sys 10 - 23
Choice of the restrictors using 2 pipe
system
Table 4b
Total calculated
flue lenght
Minimum Maximum
0 m 10 m
10 m 20 m
20 m 35 m
35 m 45 m
1 1
2
Use restrictor
size
mm
45 m
47 m
50 m
No restrictor
fig. 9a
fig. 9b