17
9 Hydro-unit configuration
9.1 Hydro-Unit MC
ATTENTION
See factory settings 3-2-2-1
When as a result of an increasing water volume the
pressure drops below the pressure set point, a pump
will be switched on. When the required system
pressure has been reached, the pumps are switched
off one at a time. The minimum run time related
switch-off delay is optimized constantly, which results
in a considerable energy saving.
Table 16: Specific parameter settings MC
Figure 3: 1 pump operation
Figure 4: 2 pump operation
Figure 5: 3 pump operation
Q
H
S
Q
H
S
Parameter Value
3-3-1 Number of pumps 1
2
3
4
5
6
3-3-2 Inlet Switch
Pressure
Level / valve ON-OFF
Level / valve prop.
3-3-3 Discharge Fixed Speed
3-5-1 Set point ... kPa
3-5-3 Bandwidth 30
3-5-13 Low pressure alarm 100
3-6-1 Opt. pump starts/h 10
3-6-2 Min. run time Default 180 s
DOL ≤ 2.2 kW 90 s
3-6-3 Min. run time corr. 10 s
3-6-8 Run-dry delay Default 30 s
Float/level control 1 s
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