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2.8
INSTALLATION SEPARATE
PIPES ("25 BF TS" version)
When installing the pipes, follow closely the
requirements of the current standards, as
well as the following practical pointers:
– With direct intake from outside, when
the pipe is longer than 1 m, you are
recommended to insulate the piping so
as to prevent formation of dew on the
outside of the piping during particularly
hard periods of the year.
– With the outlet pipe outside the building
or in cold indoor environments, insulation
is necessary to prevent burner failure in
starting.
In such cases, provide for a condensate-
collector system on the piping.
– If a segment of the flue passes through a
flammable wall, this segment must be
insulated with a glass wool pipe insulator
30 mm t hick, wit h a density of 50
kg/m
3
.
The maximum overall length of the intake
and exhaust ducts depends on the head
losses of the single fittings installed and
must not be greater than 7.60 mm H
For head losses in the fittings, refer to Table
1 and example fig. 6/a.
2
3
N° segments
to remove
none
n° 1
n° 1 e 2
da n° 1 a 3
da n° 1 a 4
da n° 1 a 5
da n° 1 a 6
da n° 1 a 7
da n° 1 a 8
da n° 1 a 9
da n° 1 a 10
without diaphragm
80
TABLE 1
Accessories ø 80
90° curve MF
45° curve MF
Extension L. 1000 (horizontal)
Extension L. 1000 (vertical)
Outlet terminal
Intake terminal
Manifold
Roof outlet terminal L. 1 390
Condensation collection T
Example of allowable installation calculation in that the sum of the head losses of the single
fittings is less than 7.60 mm H
7 meter horizontal pipe ø 80 x 0.20
7 meter horizontal pipe ø 80 x 0.30
n° 2 90° elbows ø 80 x 0.30
n° 2 90° elbows ø 80 x 0.40
n° 1 terminal ø 80
Total head loss
With this total head loss, remove the segments from n. 1 to n. 7 from diaphragm in the intake
pipe.
O.
2.8. 1
Separate flue kit (fig. 8)
2
The separate flue kit code 8089904 is
supplied with an intake diaphragm which
1
4
KEY
1 ø125/95 sponge seal
2 Fixing screw
3 Flue outlet flange
4 Inlet air diaphragm
Total load loss mm H
"25 BF TS"
0 ÷ 0.8
0.8 ÷ 1.6
1.6 ÷ 2.4
2.4 ÷ 3. 1
3. 1 ÷ 3.8
3.8 ÷ 4.5
4.5 ÷ 5.2
5.2 ÷ 5.8
5.8 ÷ 6.4
6.4 ÷ 7.0
-
7.0 ÷ 7.6
Intake
0,30
0,20
0,20
0,30
–
0, 1 0
0,20
–
–
O:
2
Intake
must be used as shown in fig. 8/a, depen-
ding on the maximum load loss permitted
in both flues.
To use the air intake in this type of outlet
O
2
Load loss (mm H
O)
2
"25 BF TS"
Outlet
Roof out. Intake
0,40
0,30
0,30
0,20
0,30
–
–
–
1,00
Outlet
1.40
–
–
2. 1 0
0.60
–
–
0.80
0. 1 0
0.30
2. 1 0
+
3.20 = 5.3 mm H
Fig. 6/a
180
100
Fig. 8
Fig. 8/a
–
–
–
–
–
–
–
0,50
–
O
2
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