Viessmann VITODENS 222-F Technical Manual page 63

Design information
V Liquid seal in the expansion vessel in l
fv
(4 % of the system volume, min. 3 l)
Df Pressure factor
(p + 1) : (p − 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 capacity per m of pipe must be taken into consideration.
Copper pipe Dim.
Capacity l/m pipe
Corrugated stainless Dim.
steel pipe
Capacity l/m pipe
For the liquid content of the solar collectors, see the Vitosol technical
guide.
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
verifying the values with appropriate calculations. The selection
refers to a hydraulic system with a liquid "bag" and use of a 6 bar
safety valve.
Vitosol 100-FM/200-FM, type SV
Static head in m
Absorber area in m 2
2.3
4.6
6.9
Vitosol 100-FM/200-FM, type SH
2 Static head in m
Absorber area in m
2.3
4.6
6.9
Vitosol 200-T
Static head in m
Absorber area in m 2
2
3
4
VITODENS
(cont.)
12 × 1
DN10
0.079
System capacity in l
5
10
15
5
10
15
5
10
15
System capacity in l
5
10
15
5
10
15
5
10
15
System capacity in l
5 25.1
10 28.1
15 31.6
5 29.2
10 30.1
15 33.6
5 31.8
10 34.9
15 35.8
15 × 1 18 × 1 22 × 1
DN13 DN16 DN20
0.133 0.201 0.314
DN16
0.25
For further information, see the Vitosol technical guide.
Note
Check the size of the expansion vessel on site.
Recomm. expansion vessel
capacity in l
22.3
25.7
29.2
24.7
27.6
31.0
28.5
29.6
32.9
Recomm. expansion vessel
capacity in l
22.9
26.4
29.8
26.0
28.9
32.3
30.5
31.5
34.8
Recomm. expansion vessel
capacity in l
28 × 1.5 35 × 1.5
DN25 DN32
0.491 0.804
Recomm. heat sink
(see page 62)
18 —
25
25 2 m uninsulated pipe
—
—
40 Type 21
0.6 m uninsulated pipe
—
Recomm. heat sink
(see page 62)
18 —
25
40 2 m uninsulated pipe
—
—
40 Type 21
0.6 m uninsulated pipe
50 —
Recomm. heat sink
(see page 62)
25 1.5 m uninsulated pipe
40 —
—
40 Type 21
50 —
—
40 Type 21
50
80 —
VIESMANN
42 x 1.5
DN40
1.195
5
63