Wilo Control EC-WP Series Installation And Operating Instructions Manual page 25

6.6.6 "Filling" control mode: 2x wells,
2x pumps, 2x float switches or
electrodes
HW
ON/OFF1
ON/OFF2
W1
DR1
P1 P2
Fig. 29: Application diagram
1
6
5
5.2 5.1
4
4.5 4.2
Fig. 30: 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
HW
T
ON/OFF1
ON/OFF2
W1
DR1
P1
W2
W2
DR2
DR2
P2
When the fill level in the tank drops and the first switch on-level (ON/OFF1) is reached, the
first pump switches on. The tank is filled. When the water level in the tank continues to drop
and the second switch on-level (ON/OFF2) is reached, the second pump switches on. The
switching cycle is defined by the cable length of the float switch.
When the switch-off levels (ON/OFF2 and ON/OFF1) are reached, the respective pump
switches 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 prevent the tank from overflowing, install a float switch or electrode in the tank:
• If the high water level is exceeded, all pumps switch off. An error message appears on the
display and an alarm sounds.
• If the water level falls below the high water level, the alarm and error message are auto-
matically reset.
To protect the pumps from a dry run, install a float switch or electrode in each well:
• If the water level falls below the dry running level, the corresponding pump switches off.
An error message 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 switches/electrodes for well 1
5 Switching status of the float switches/electrodes for well 2
4.1
6 Fieldbus active
Overview of terminals
DR1 -
25 26 27 28
1/(2)
closed -
Open -
Required menu settings
High water level
Switch-on/switch-off level 1
Switch-on/switch-off level 2
Well 1
Dry-running level 1
Pump 1
Well 2
Dry-running level 2
Pump 2
ON/OFF1 DR2
29 30 31 32
off
on/(off)
1 2
1/(2)
closed closed
Open Open
4.1
4.2
4.5
5.1
5.2
- ON/OFF2 -
33 34 35 36 45 46
4-20 mA
In
off
on/(off)
2 2
- closed −
- Open −
en
DR
ON/OFF1
HW
DR2
ON/OFF2
HW
49 50
2
closed
Open
25