Wilo Control EC-WP Series Installation And Operating Instructions Manual page 36

en
6.6.17 "Constant pressure control p-c"
control mode: 2x pumps, with
pressure sensor
p
3
1
Fig. 51: Functional diagram
1
6
Fig. 52: Screen display
Function
Terminal overview symbol
Float switch operating principle
Top contact
Bottom contact
Menu and value to be set
7 Operation
36
1 Activation point
2 1st deactivation point
3 2nd deactivation point
The pressure sensor detects the actual pressure value. The pumps are switched on and off
2
depending on the set thresholds:
• If the pressure in the system falls below the activation threshold, both pumps switch on.
• When the first deactivation threshold is exceeded, the first pump switches off after the
set switch-off delay has elapsed.
• When the second deactivation threshold is exceeded, the second pump switches off after
Q
the set switch-off delay has elapsed.
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 Current pressure in the tank
4
6 Fieldbus active
Overview of terminals
DR -
25 26 27 28
1/(2)
closed −
open −
Required menu settings
NOTICE! The values shown in menus 5.11 and 1.01 correspond to the factory setting.
Enter the system-specific values here.
- -
29 30 31 32
off
on/(off)
1 2
1/(2)
− −
− −
DANGER
Danger of death due to electrical current!
There is danger of death from open switchgear.
• Only operate the switchgear when closed.
• Electrical work on the internal components must be carried out by a
qualified electrician.
Installation and operating instructions • Wilo-Control EC-WP • Ed.01/2024-08
- - Pressure
sensor
33 34 35 36 45 46
4-20 mA
In
off
on/(off)
2 2
− − −
− − −
-
49 50
2
-
-