Ferroli SIGMA Installation And Servicing Instructions page 17

2 07 02 wo pipe flue system
1 Utilise the pipes and fi ttings fl ows resistance tables on the following pages and calculate the total fl ow resistance in
metres-air, by adding the fl ow resistances of the components in the whole air-fl ue system, based on their position
(vertical or horizontal, air inlet or fl ue outlet).
Please note that the same fi tting, identifi ed by a one code (i.e. 1 pipe diameter 80, code KWMA83A), can offer
different fl ow resistances if positioned as air inlet or fl ue outlet, if placed vertically or horizontally.
e flow esista
t ey a e a ea y i
t e pipes a
flow esista e a ues w itte
2 erify that the total fl ow resistance calculated is less or e ual to 0 metre.
hoose the more suitable restrictor from table below.
a
amp e o a u atio
a
Ref. Description
1 Connection for concentric pipe cod. KWMR52A
2 Air/Flue T separator cod. KWMA90U
3
Male - Female flue Ø 80 mm
4
5 Flue bend 80 mm
6 Air wall terminal outlet flue Ø80
7 Air wall terminal air Ø80
ota flow esista e 17
use est i to 1
e o t e spe ia two pipe flue ai a apte s o ot a e to e i
u e i t e ma imum e gt
tti gs flow esista
e e o y to e o i pipes a
Total flow resistance
0 - 20 metres
20 - 30 metres
30 - 40 metres
o wa i et out et wit 2 pipe system ma imum tota flue e gt
N° of
pieces
1
1
1
Horizontal
Air
Vertical
/
1
Horizontal
Flue
Vertical
5
1
1
1
Total
m
Sigma
a u atio
e e u tio a e ee summa ise o t e o owi g page
tti gs
Use restrictor:
Sigma 20/40
Ø36
Ø39
Ø39
6
Length
reduction
/ /
already included
1
/
2
5
2,5
5
2
17,5
7
ig 7
u e i t e a u atio as
Sigma 40/60
Ø41
Ø46
Ø46
0 met es
4
1 m
Sigma 60
3
e
5
5 m
4
2
1
17