Grundfos Control DDD Montage- Und Betriebsanleitung Seite 52

8.7.50 Pressure/level switch (4.4.1.1)
Fig. 104 Pressure/level switch
Description
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 354 will register water shortage
after a time delay of approximately five 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 operating panel
• Settings > Monitoring functions > Dry-running protection >
Pressure/level switch > Go to setting of digital input. Display
Digital inputs (4.3.7) appears.
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.
52
8.7.51 Measurement, inlet pressure (4.4.1.2)
Fig. 105 Measurement, 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: Auto or Manual.
Setting via operating panel
• Settings > Monitoring functions > Dry-running protection >
Measurement, inlet pressure > Go to setting of analog input.
Display 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: Auto or Manual.
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.