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EN
34
7.3.4 - CHECKING THE PRESSURE LOSSES
With the pump running at the set speed, compare the reread fl ow with the following curves to determine the
system pressure losses and compare them with the calculations made during the installation of the system.
AUAH AUBH
• Once the checks have been completed, press the button until you return to the main menu.
Example of calculation for fl oor system with AUBH:
• Set the pump speed to re-read a capacity of 1.10
m
3
/h (see table of page 33).
• On the AUBH chart, cross the vertical line corre-
sponding to 1.10 m
3
/h with the pump curve corre-
sponding to the % of the set speed and the curve
of the unit pressure losses.
• The system pressure losses correspond to the
pressure losses of the pump curve less the unit
pressure losses. In our example, the pressure los-
ses are 46-13 = 33 kPa.
AUCH AUDH
0 0,5 1,0 1,5 2,0 2,5 3,0
0
1
2
3
4
5
6
7
0
10
20
30
40
50
60
70
75 %
85 %
95 %
65 %
55 %
45 %
35 %
25 %
15
%
p /kPa H /m
Q /m³/ h
max.
0 0,2 0,4 0,6 0,8
0 2 4 6 8 10
Q /l/s
Q /Igpm
4,5
1,1
46
13
33
0 0,5 1,0 1,5 2,0 2,5 3,0 3,5
0 0,2 0,4 0,6 0,8 1,0
0 2 4 6 8 10 12 14
0
1
2
3
4
5
6
7
8
0
10
20
30
40
50
60
70
80
4,0
75 %
85 %
95 %
65 %
55 %
45 %
35 %
25 %
max.
p /kPa H /m
Q /m³/ h
Q /l/s
Q /Igpm
15 %
0 0,5 1,0 1,5 2,0 2,5 3,0 3,5
0 0,2 0,4 0,6 0,8 1,0
0 2 4 6 8 10 12 14
0
1
2
3
4
5
6
7
8
0
10
20
30
40
50
60
70
80
4,0
75 %
85 %
95 %
65 %
55 %
45 %
35 %
25 %
max.
p /kPa H /m
Q /m³/ h
Q /l/s
Q /Igpm
15 %
Pump curve
Unit pressure
losses
0 0,5 1,0 1,5 2,0 2,5 3,0
0
1
2
3
4
5
6
7
0
10
20
30
40
50
60
70
75%
85%
95%
65%
55%
45%
35%
25%
15%
p /kPa
H /m
Q /m³/ h
max.
0 0,2 0,4 0,6 0,8
0 2 4 6 8 10
Q /l/s
Q /Igpm
95%
85%
75%
65%
55%
45%
35%
25%
15%