Grundfos Control MPC-Serie Installationsanleitung Seite 55

Duty point, Q0,
50 % speed
Fig. 94 Reading of power, Q0, 50 % speed (Grundfos Product
Center)
Duty point, rated
power Pnom
Fig. 95 Reading of rated power Pnom (Grundfos Product
Center)
Qnom and Hnom are the rated duty point of the
pumps and usually the duty point with the highest
efficiency.
Setting via the operating panel
• Settings > Secondary functions > Pump curve data.
• Select and set:
– Rated flow rate Qnom
– Rated head Hnom
– Max. head Hmax
– Max. flow rate Qmax
– Power, Q0, 100 % speed
– Power, Q0, 50 % speed
– Rated power Pnom.
Power, Q0, 50 % speed
Rated power Pnom
8.7.45 Control source (4.3.20)
Fig. 96 Control source
Description
The system can be remote-controlled via an external bus
connection (option). See section
information, see section 8.8 Data
Select the control source, that is either CU 352 or the external
bus connection.
Setting via the operating panel
• Settings > Secondary functions > Control source.
Factory setting
The control source is CU 352.
8.7.46 Fixed inlet pressure (4.3.22)
Fig. 97 Fixed inlet pressure
Description
The function is only used when no inlet-pressure sensor is fitted
in the system and the inlet pressure is fixed and known.
If the booster system has a fixed inlet pressure, you can enter it in
the display so that CU 352 can optimise the performance and
control of the system.
Setting range
A fixed inlet pressure can be set, and the function can be enabled
and disabled.
Setting via the operating panel
• Settings > Secondary functions > Fixed inlet pressure.
• Select: Enabled or Disabled.
• Set: Fixed inlet pressure.
Factory setting
The function is disabled.
7. Click [Apply]. For further
communication.
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