Cut-Out Pressure; Differential Pressure - Grundfos Hydro Solo-S Montage- Und Betriebsanleitung

5.3 Cut-out pressure

Figure 7 shows the curve for cut-out pressure
setting.
p
[bar]
12
10
8
6
4
2
0
0 4 8 12
Fig. 7
A = Number of turns of the cut-out pressure screw
(pos. 1), fig. 6.

5.4 Differential pressure

Proceed as follows (see fig.
1. Mark the cut-out pressure on the axis to the left
and the differential pressure on the axis to the
right.
2. Draw a line between the two points.
3. Read the value on the number line. This value is
the number of turns of the differential pressure
screw (pos. 2), fig. 6.
Example
The example in fig. 8 shows:
Cut-out pressure = 5 bar.
Differential pressure = 1.5 bar.
The number line from 0 to 9 is intersected at a value
of 4.5, i.e. that the differential pressure screw must
be turned 4.5 times.
8
4-12
2-6
16 20 24 A
8 or 9):
Nomogram for differential pressure
2 to 6 bar
Fig. 8
Nomogram for differential pressure
4 to 12 bar
Fig. 9
If the differential pressure has been set to
a value which is higher than the cut-out
pressure, the booster set cannot start. Set
Note
the differential pressure to a lower value
(turn the differential pressure screw
clockwise).