Viessmann VITODENS 242-F Technical Manual page 74

Design information
V Liquid seal in the expansion vessel in l
fv
(4 % of the system volume, min. 3 l)
Df Pressure factor
− p
(p + 1) : (p )
e e o
p Max. system pressure at the safety valve in bar (90 % of
e
the safety valve response pressure)
p System pre-charge pressure
o
p = 1 bar + 0.1 bar/m static head
o
To determine the steam volume in the pipework, the content per m of pipe must be taken into consideration.
Copper pipe
Content
Corrugated stainless
steel pipe
Content
Liquid content of the collectors, see technical guide Vitosol.
Quick selection of expansion vessel and heat sink
The details in the following table are standard values. They allow quick
estimates at the design and calculation stage. We recommend a thor-
ough calculation. The selection refers to a hydraulic system with a liq-
uid "bag" and the use of a 6 bar safety valve.
Vitosol 200-F/300-F, type SV
Static height in
Absorber area in m 2
m
2.3
4.6
6.9
Vitosol 200-F/300-F, type SH
2 Static height in
Absorber area in m
m
2.3
6
4.6
6.9
Vitosol 200-T
Absorber area in m 2 Static height in
m
2
3
4
VIESMANN
74
(cont.)
Dim. 12 × 1
DN 10
l/m pipe 0.079
Dim.
l/m pipe
System content in l
5
10
15
5
10
15
5
10
15
System content in l
5
10
15
5
10
15
5
10
15
System content in l
5
10
15
5
10
15
5
10
15
15 × 1 18 × 1 22 × 1
DN 13 DN 16 DN 20
0.133 0.201 0.314
DN 16
0.25
For further information, see the technical guide Vitosol.
Note
Check the size of the expansion vessel on site.
Recom. expansion vessel
capacity in l
22.3
25.7
29.2
24.7
27.6
31.0
28.5
29.6
32.9
Recom. expansion vessel
capacity in l
22.9
26.4
29.8
26.0
28.9
32.3
30.5
31.5
34.8
Recom. expansion vessel
capacity in l
25.1
28.1
31.6
29.2
30.1
33.6
31.8
34.9
35.8
28 × 1.5 35 × 1.5 42 x 1.5
DN 25 DN 32
0.491 0.804
Recom. heat sink
(see page 73)
18 —
25
25 2 m uninsulated pipe
—
—
40 Type 21
0.6 m uninsulated pipe
—
Recom. heat sink
(see page 73)
18 —
25
40 2 m uninsulated pipe
—
—
40 Type 21
0.6 m uninsulated pipe
50 —
Recom. heat sink
(see page 73)
25 1.5 m uninsulated pipe
40 —
—
40 Type 21
50 —
—
40 Type 21
50
80 —
VITODENS
DN 40
1.195