Grundfos Control MPC-Serie Installationsanleitung Seite 60

8.7.55 Measurement, tank level (4.4.1.3)
Fig. 106Measurement, tank level
Description
Dry-running protection can take place by means of a level
transmitter measuring the level in a tank on the inlet side.
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.
• Tank level for "Warning".
• Tank level for "Alarm + stop".
• Restarting: Manual or Auto.
Setting via the operating panel
• Settings > Monitoring functions > Dry-running protection >
Measurement, tank level > Go to setting of analog input.
Display 8.7.30 Analog inputs (4.3.8)
1. Set the input to "Tank level, suction side".
2. Press [Back] x 3.
3. Select: Enabled.
4. Select and set the level:
• Warning.
• Alarm + stop.
5. Select alarm resetting: Manual or Auto.
Factory setting
The function is disabled.
60
appears.
8.7.56 Min. pressure (4.4.2)
Fig. 107Min. 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 lower than
a set minimum level for an adjustable time.
The minimum pressure can be monitored if a fault indication is
required in situations where the outlet pressure becomes lower
than the set minimum pressure.
You can set whether the indication is to be just a warning or an
alarm stopping the pumps. This may be desirable if the system is
used for an irrigation system where a very low outlet pressure
may be due to pipe fracture and thus an extraordinarily high
consumption and a very low counterpressure. In such situations,
it is desirable that the system stops and indicates alarm. This
situation requires manual resetting of alarms.
You can set a startup delay ensuring that the system can build up
pressure before the function is enabled. You can also set a time
delay, that is for how long time the outlet pressure may be lower
than the set minimum pressure before the alarm is activated.
Setting range
• Minimum pressure level within the range of the primary
sensor.
• Activation of stop when the pressure falls below the minimum
pressure.
• Time delay of function at start-up.
• Time delay of function during operation.
Setting via the operating panel
• Settings > Monitoring functions > Min. pressure > Enabled.
1. Select and set: Min. pressure.
2. Select: Alarm + stop at min. pressure.
3. Set:
• Time delay of function at start-up
• Time delay of function during operation.
Factory setting
The function is disabled.