Wilo Control EC-WP Series Installation And Operating Instructions Manual page 30

en
6.6.11 "Drain" control mode: 1x well,
2x pumps, 3 float switches or elec-
trodes
ON1
W1
OFF
DR
P1 P2
Fig. 39: Application diagram
1
6
4
4.4 4.3 4.2
Fig. 40: Screen display
Function
Terminal overview symbol
Float switch operating principle
Top contact
Bottom contact
Menu and value to be set
30
ON1
ON2
OFF
DR
ON2
P1
P2
When the fill level in the well rises and the first switch on-level (ON1) is reached, the first
pump switches on. The well is drained. When the water level in the well continues to rise and
the second switch on-level (ON2) is reached, the second pump switches on.
When the switch-off level (OFF) is reached, all pumps switch off after the set switch-off
delay has elapsed. NOTICE! The base-load and peak-load pumps are cycled alternately
(see menu 5.60).
To protect the pumps 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 pumps switch 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 OFF
25 26 27 28
1/(2)
closed closed
Open Open
Required menu settings
Switch-on level 1
Switch-on level 2
Switch-off level
Dry-running level
Pump 1
Pump 2
ON1 -
29 30 31 32
off
on/(off)
1 2
1/(2)
closed −
Open −
Installation and operating instructions • Wilo-Control EC-WP • Ed.01/2024-08
4.1
4.2
4.3
4.4
- ON2 -
33 34 35 36 45 46
4-20 mA
In
off
on/(off)
2 2
− closed −
− Open −
DR
OFF
ON1
ON2
-
49 50
2
closed
Open