Grundfos Control MPC Montage- Und Betriebsanleitung Seite 67

8.6.62 Max. pressure (4.4.3)
Max. pressure
Description
The outlet pressure will be monitored if the application is pressure
boosting. In all other applications, the system pressure will be
monitored. CU 352 will react if the pressure becomes higher than a
set maximum level.
In certain installations, a too high outlet pressure may cause
damage. It may therefore be necessary to stop all pumps for a short
period if the pressure is too high.
You can set whether the system is to restart automatically after the
pressure has dropped below the maximum level, or if the system
must be reset manually. Restarting will be delayed by an adjustable
time. See section Min. time between start/stop (4.2.1).
Setting range
• Maximum pressure level within the range of the primary sensor.
• Manual or automatic restarting.
Setting via the operating panel
• Settings > Monitoring functions > Max. pressure > Enabled.
1. Set: Max. pressure.
2. Select resetting: Manual or Auto.
Factory settings
The function is disabled.
Related information
8.6.14 Min. time between start/stop (4.2.1)
8.6.63 External fault (4.4.4)
External fault
Description
The function is used when CU 352 is to be able to receive a fault
signal from an external contact. In case of external fault, CU 352
indicates warning or alarm. In case of alarm, the system changes to
another manual operating mode, for instance Stop.
Setting range
• Selection of digital input for the function.
• Setting of time delay from closing of the contact until CU 352
reacts.
• Reaction in case of external fault: Warning or alarm and change
of operating mode.
• Restarting after alarm: Manual or Auto.
Setting via the operating panel
• Settings > Monitoring functions > External fault > Go to
setting of digital input. Display Digital inputs (4.3.7) appears.
1. Set the input to External fault.
2. Press .
3. Set: Time delay, fault indication.
4. If only a warning is required in case of external fault, select
Warning. If the system is to give alarm and change operating
mode in case of external fault, select operating mode Manual or
Auto.
Factory settings
The function is disabled. If the function is enabled, the following
values have been set from factory:
• Time delay: 5 seconds.
• Operating mode in case of alarm: Stop.
• Restarting: Manual.
Related information
8.6.28 Digital inputs (4.3.7)
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