Wilo Control EC-Booster Installation And Operating Instructions Manual page 21

6.5.11 Low water level connection (dry-
running protection)
Fig. 21: Connection overview symbol
!
A B
Fig. 22: Electrode connection types
6.5.12 "Extern OFF" connection: Remote
deactivation
Fig. 23: Connection overview symbol
Installation and operating instructions • Wilo-Control EC/ECe-Booster • Ed.02/2023-08
The low water level (dry-running protection) can also be monitored using a float or pressure
switch and one or two electrodes:
• Float/pressure switch
• Electrode
–
Only Control EC-B/ECe-B 1x ... and EC-B/ECe-B 2x ...
–
Connection is protected against reverse polarity!
The input acts as a normally closed contact (NC):
• Float switch/pressure switch open or electrode non-immersed: min. water level
• Float switch/pressure switch closed or electrode immersed: water level sufficient
The terminals are fitted with a converter bridge at the factory.
Insert the connection cables laid by the customer through the threaded cable glands and se-
cure. Remove the converter bridge and connect the wires to the terminal strip according to
the connection diagram. Use the terminal number shown in the connection overview on
the cover.
Use of electrodes
If electrodes are used for level measurement, the connection can be made in the following
ways:
A 1x electrode with reference earth on the tank
!
B 2x electrodes with reference earth via the electrode
Remote deactivation of all pumps can be performed using a separate switch:
• Contact closed: pumps enabled
• Contact open: all pumps deactivated – the display shows the "Extern OFF" symbol.
The terminals are fitted with a converter bridge at the factory.
NOTICE! Remote deactivation is prioritised. All pumps are deactivated regardless of their
current pressure value. The pumps cannot be operated in manual mode!
Insert the connection cables laid by the customer through the threaded cable glands and se-
cure. Remove the converter bridge and connect the wires to the terminal strip according to
the connection diagram. Use the terminal number shown in the connection overview on
the cover.
CAUTION
Property damage due to external voltage!
An external voltage which is applied destroys the component.
• Do not apply external voltage.
CAUTION
Property damage due to external voltage!
An external voltage which is applied destroys the component.
• Do not apply external voltage.
en
21