Grundfos Control DDD Montage- Und Betriebsanleitung Seite 53

8.7.52 Measurement, tank level (4.4.1.3)
Fig. 106 Measurement, 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 automatic.
Setting via operating panel
• Settings > Monitoring functions > Dry-running protection >
Measurement, tank level > Go to setting of analog input.
Display Analog inputs (4.3.8)
1. Set the input to "Tank level, suction side".
2. Press [Back].
3. Select: Enabled.
4. Select and set the level:
• Warning.
• Alarm + stop.
5. Select resetting: Manual or Auto.
Factory setting
The function is disabled.
appears.
8.7.53 Min. pressure (4.4.2)
Fig. 107 Min. pressure
Description
The outlet pressure will be monitored if the function is enabled.
CU 354 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.
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 startup.
• Time delay of function during operation.
Setting via 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 startup
• Time delay of function during operation.
Factory setting
The function is disabled.
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