“Drain” operating mode

The reservoir or pump chamber is drained. The pumps are activated when the level rises and switched off when the level falls. This control is mainly used for water drainage.

Level control for float switch or electrodes

1

Pump 1 On

2

Pump 2 On

3

Pump 1 and 2 Off

4

Dry-running level

5

High water level

Up to a maximum of five float switches or electrodes can be connected. This can be used to control two pumps:

  • Pump 1 On
  • Pump 2 On
  • Pump 1 and 2 Off
  • Dry-running level
  • High water level

The float switch should be equipped with a NO contact: Once the switching point has been reached, the contact is closed.

Illustration of the switching points with a float switch or electrode in the “drain” operating mode using the example of two pumps
Illustration of the switching points with a float switch or electrode in the “drain” operating mode using the example of two pumps

Level measurement with level sensor or dynamic pressure bell

1

Pump 1 On

2

Pump 1 Off

3

Pump 2 On

4

Pump 2 Off

5

Dry-running level

6

High water level

7

High water level*

8

Dry-running level*

* Also implemented via a separate float switch for increased operational reliability.

A level sensor or dynamic pressure bell can be connected. This can be used to control three pumps:

  • Pump 1 On/Off
  • Pump 2 On/Off
  • Pump 3 On/Off
  • Dry-running level
  • High water level
Illustration of the switching points with a level sensor in the “drain” operating mode using the example of two pumps
Illustration of the switching points with a level sensor in the “drain” operating mode using the example of two pumps