Sime FORMAT DGT 25/15 BF Manual De Instrucciones página 67

thick and with a density of 50 kg/m
The maximum total length, which is the
sum of lengths of the aspiration and
discharge pipes, is determined by the
loss of charge of the single accessories
inserted and must not result as more
than 9.0 mm H O.
2
For the loss of charge of the accessories,
refer to Table 1 and to the example given in
fig. 7.
2.8. 1 Air/combustion products divider
(fig. 8 - fig. 8/a)
The air/combustion products divider cod.
8093020 (fig. 8) is supplied with the aspi-
ration diaphragm that must be engaged,
depending on t he maximum head loss
accepted in both ducts, as indicated in fig.
8/a.
2.8.2 Outlet systems (fig. 9)
The diagrams in fig. 9 illustrate a number
of examples of different types of separate
outlets.
5
CA
2 TABLE 1
.
Accessories ø 80
90° elbow MF
45° elbow MF
Extension L. 1000 (horizontal)
Extension L. 1000 (vertical)
Wall terminal
T-shaped condensation collector
Roof exit terminal*
* The loss of the roof exit terminal in aspiration concludes the collector code 8091400
Calculation example of the head loss of a "25/15 BF" vers. boiler (installation allowed as the
sum of the head losses of the accessories used is less than 9.0 mmH
7 meter horizontal pipe ø 80 x 0.20
7 meter horizontal pipe ø 80 x 0.30
No. 2 90° elbows ø 80 x 0.35
No. 2 90° elbows ø 80 x 0.40
No. 1 wall terminal ø 80
Total head loss
With this total head loss, remove the segments from No. 1 to No. 6 from diaphragm in the intake pipe.
CS
Load loss (mmH O)
2
25/15 BF
Intake Outlet
0,35 0,40
0,30 0,35
0,20 0,30
0,20 0, 1 0
0, 1 5 0,50
--- 0,80
1,60 0, 1 0
Intake Outlet
1.40
–
0.70
–
0. 1 5
2.25 +
3
2
KEY
1 Divider with vent
2 Inlet air diaphragm
3 Air intake bend
4 Elbow product discharge
5 Magnesium anode
CA Inlet
CS Outlet
ENG
O):
2
–
2. 1 0
–
0.80
0.50
3.40 = 5.65 mmH O
2
Fig. 7
4
1
Fig. 8
67
ES
PT