Grundfos Control MPC-Serie Installationsanleitung Seite 25

3
Flow rate [m /h]
100
75
50
25
5 50 70.7 86.6
Fig. 25 Regulation curve for MPC-F system in open loop
3
Flow rate [m /h]
100
75
50
25
5 50 70.7 86.6
Fig. 26 Regulation curve for MPC-S system in open loop
Setting range
These settings must be made in connection with open loop:
• Open loop
• Set setpoint 1, open loop
• External setpoint influence
• Normal.
Flow rate
Pump 1
Pump 2
Pump 3
Pump 4
Input [%] from
external controller
100
Flow rate
Pump 1
Pump 2
Pump 3
Pump 4
Input [%] from
external controller
100
Setting via the operating panel
Proceed as follows to set an external control source to control the
system:
• Operation > Further settings > Control mode.
• Select: Open loop.
1. Press [Back] x 2.
2. Select: Stop
3. Set to 100 %: Set setpoint 1, open loop.
4. Settings > Primary controller > External setpoint influence >
Go to setting of analog input.
5. Select analog input and range.
6. Select:
• Measured input value. Display 4.3.8.1.1 appears.
• Select: 0-100 % signal.
7. Press [Back].
8. Set the minimum and maximum sensor value.
9. Press [Back] x 2.
10. Select:
• Input value to be influenced by
• 0-100 % signal.
11. Press.
12. Select: Set the influence function. See also section
8.7.6 Setting of influence function
13. Set the number of points.
14. Set for Point 1:
• External input value
• Reduce setpoint to
15. Repeat step 14 for all selected points.
16. Press [Back].
17. Set as seconds: Filter time.
18. Select: Enabled.
19. Press [Back] x 2.
20. Select:
• Operation
• Normal.
The booster system can now be controlled by an external
controller.
Factory setting
Closed loop.
(4.1.3.2).
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