Ferroli SIGMA, Installation And Servicing Instructions, Page: 14 / 32

14
Sigma
2
Example of direct roof flue outlet
and wall air inlet with 2 pipe system
3
Example of concentric flue Ø 100
with vertical outlet flue use.
Warning
• Back exit with 2 pipe is not possi-
ble.
Fig. 32
Fig. 33
Note
• Bear in mind that the two concentric
pipes must slope downwards away from the
boiler at a rate of about 3 mm/m to avoid
rainwater entering the boiler. Outside, the
pipes should protrude from the wall between
10 and 60 mm.
Warning
• Back exit with coaxial bend is
not possible
1
Example of concentric flue Ø 100
with appliance bend use
2.06.01 Examples of top fl ue connection
Fig. 31
2.06 Top outlet Flue Connection
Three different connection are available from top of the boiler, using accessories as reported on fig. 30a, b e c and
on examples a next page.
Fig. 30
Vertical Connection, concentric bend
and two pipe separator can be
supplied on request.
Top outlet horizontal
concentric fl ue
Top outlet two
pipe system
Top outlet vertical
concentric fl ue
1 2 3
Fig. 30a Fig. 30b Fig. 30c