DOMINA 80 E
10
Fig. 8
Pressure loss diagram
SIZING OF ADDITIONAL EXPANSION VESSELS:
Deduct from the value given in the table the 8 litre
vessel supplied.
Note:
1.
Fill C.H. installation to min. 1.5 bar.
2.
Select the expansion vessel for a system
pressure of 2.0 bar.
3.
Expansion vessel must be fitted to central
heating return pipe.
4.
The standard 7 litre expansion vessel is
charged to 1 bar.
5.
The additional expansion vessel should be
charged to 1 bar.
SAFETY VALVE
SETTING (bar)
VESSEL CHARGE
PRESSURE (bar)
INITIAL SYSTEM
PRESSURE (bar)
TOTAL WATER
CONTENT of SYSTEM
3.0
0.5
1.0
1.5
1.0
1.5
2.0
1.5
2.0
2.0
EXPANSION VESSEL VOLUME (litres)
LITRES
25
3.5
6.5
13.7
4.7
10.3
8.3
50
7.0
12.9
27.5
9.5
20.6
16.5
75
10.5
19.4
41.3
14.2
30.9
24.8
100
14.0
25.9
55.1
19.0
41.2
33.1
125
17.5
32.4
68.9
23.7
51.5
41.3
150
21.0
38.8
82.6
28.5
61.8
49.6
175
24.5
45.3
96.4
33.2
72.1
57.9
200
28.0
51.8
110.2
38.0
82.4
66.2
0.140
0.259
0.551
0.190
0.412
0.33
For syst. volumes other than
those given above, mult. the syst.
volume by the factor across
m |h
3
Q
8
7
6
5
4
3
2
1
0
0.5
1.5
2.5
1
2
H
mbar x 100
