Pump Cascade Control (4.2); Min. Time Between Start/Stop (4.2.1) - Grundfos Control DDD Montage- Und Betriebsanleitung

Setting via the operating panel
• Settings > Primary controller > Tank filling.
1. Select: Enable.
2. Set Tank height, which corresponds to the height of the tank.
3. Set Rinse level (htop), which is the overflow area of the tank
and is used during forced water change if enabled.
4. Set Max. level (hmax), which is the maximum water level of
the tank.
5. Set Min. level (hmin), which is the minimum water level of the
tank.
6. Set Water change level, which is the minimum water level
used during water change.

8.7.12 Pump cascade control (4.2)

Fig. 60 Pump cascade control
In the menu, you can set the functions connected to pump
cascade control.
The following menus can be selected:
• Min. time between start/stop
• Max. number of starts/hour
• Standby pumps
• Forced pump changeover
• Pump test run
• Pump stop attempt
• Pump start and stop speed.

8.7.13 Min. time between start/stop (4.2.1)

Fig. 61 Min. time between start/stop
Description
The function ensures a delay between the starting and stopping
of one pump and the starting and stopping of another pump.
The purpose is to prevent hunting when pumps start and stop
continuously.
Setting range
From 1 to 3600 seconds.
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Setting via operating panel
Settings > Pump cascade control > Min. time between start/stop.
Factory setting
The setting is done in the startup wizard and depends on the
application.