Wilo Control EC-WP Series Installation And Operating Instructions Manual page 27

6.6.8 "Drain" control mode: 1x well,
1x pump, 1x float switch or elec-
trode
ON/OFF
W1
DR
P1
Fig. 33: Application diagram
1
6
4
4.2
Fig. 34: Screen display
Function
Terminal overview symbol
Float switch operating principle
Top contact
Bottom contact
Menu and value to be set
Installation and operating instructions • Wilo-Control EC-WP • Ed.01/2024-08
ON/OFF
DR
When the fill level in the well rises and the switch on-level is reached, the pump switches on.
The well is drained. When the switch off level is reached, the pump switches off after the set
switch-off delay has elapsed. The switching cycle is defined by the cable length of the float
switch.
To protect the pump from a dry run, install an additional float switch or electrode in the well:
• If the water level falls below the dry running level, the pump switches off. An error mes-
sage appears on the display and an alarm sounds.
• If the dry-running level is exceeded, the alarm and error message are automatically reset.
1 Current pump status
2
2 Standby pump activated
3 Control mode
3
4 Switching status of the float switch/electrode
6 Fieldbus active
4.1
Overview of terminals
DR -
25 26 27 28
1/(2)
closed −
Open −
Required menu settings
Switch-on and off level, switching cycle is determined by the cable length
Dry-running level
ON/OFF -
29 30 31 32
off
on/(off)
1 2
1/(2)
closed −
Open −
4.1
4.2
- - -
33 34 35 36 45 46
4-20 mA
In
off
on/(off)
2 2
− − −
− − −
en
DR
ON/OFF
-
49 50
2
closed
Open
27