Grundfos Control MPC-Serie Installationsanleitung Seite 59

8.7.53 Pressure/level switch (4.4.1.1)
Fig. 104Pressure/level switch
Description
The function is primarily used in booster applications. Dry-running
protection can take place by means of a pressure switch on the
inlet manifold or a level switch in a tank on the inlet side.
When the contact is open, CU 352 registers water shortage after
a time delay of approximately 5 seconds. You can set whether the
indication is to be just a warning or an alarm stopping the pumps.
You can set restarting and resetting of alarms to be automatic or
manual.
Setting range
• Selection of digital input for the function.
• Reaction in case of water shortage: Alarm + stop.
• Restarting: Manual or Auto.
Setting via the operating panel
• Settings > Monitoring functions > Dry-running protection >
Pressure/level switch > Go to setting of digital input. Display
8.7.28 Digital inputs (4.3.7)
1. Set the input to dry-running protection.
2. Press [Back].
3. Select:
• Warning or Alarm + stop.
• Manual or Auto.
Factory setting
The setting is done in the startup wizard and depends on the
application.
appears.
8.7.54 Measurement, inlet pressure (4.4.1.2)
Fig. 105Measurement, inlet pressure
Description
Dry-running protection can take place by means of a pressure
transmitter measuring the inlet pressure.
You can set two levels:
• Warning
• Alarm + stop.
You can set restarting and resetting of alarms to be automatic or
manual.
Setting range
• Selection of analog input for the function.
• Inlet pressure level for "Warning".
• Inlet pressure level for "Alarm + stop".
• Restarting: Manual or Auto.
Setting via the operating panel
• Settings > Monitoring functions > Dry-running protection >
Measurement, inlet pressure> Go to setting of analog input.
Display 8.7.30 Analog inputs (4.3.8)
1. Select: Inlet pressure.
2. Press [Back].
3. Select: Enabled.
4. Select and set the level:
• Warning.
• Alarm + stop.
5. Select resetting: Manual or Auto.
If one of the levels is not required, the level value
must be the minimum value of the inlet-pressure
transmitter. This disables the function.
Factory setting
The setting is done in the startup wizard and depends on the
application.
appears.
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