Wilo Control EC-L, Инструкция по установке и эксплуатации

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Installation and operating instructions • Wilo-Control EC-L • Ed.04/2022-09 21
Min. water level (operating mode “fill”)
!
Fig. 15: Connection overview symbol
The min. water level can also be monitored by the following signal transmitters:
• Float switch
• Electrode
–
Only Control EC-L1 ... and EC-L2 ...
–
Hardware version 2 or higher
–
Connection is protected against reverse polarity!
The input acts as a normally open contact (NO):
• Float switch open/electrode not immersed: Min. water level
• Float switch closed/electrode immersed: water level sufficient
The terminals are fitted with a converter bridge at the factory.
Insert the connection cable 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.
6.5.9 High water alarm connection with
separate float switch
DANGER
Risk of explosion due to incorrect connection!
If the connected signal transmitter is installed in an explosive atmo-
sphere (Ex zone), there is a risk of explosion due to incorrect connection:
• Do not connect electrode in an explosive atmosphere (Ex zone)!
• Connect the float switch using an Ex cut-off relay!
• Connect level sensor via a Zener barrier!
• Observe the section on explosive atmospheres in the appendix.
• Connection must be carried out by a qualified electrician.
CAUTION
Do not apply external voltage!
An external voltage which is applied destroys the component.
Fig. 16: Connection overview symbol
The high-water level can also be monitored by the following signal transmitters:
• Float switch
• Electrode
–
Only Control EC-L1 ... and EC-L2 ...
–
Hardware version 2 or higher
–
Connection is protected against reverse polarity!
The input acts as a normally open contact (NO):
• Float switch open/electrode not immersed: No high water alarm
• Float switch closed/electrode immersed: High water alarm
NOTICE! A separate signal transmitter for the high water level is recommended as an ad-
ditional system safety measure.
Insert the connection cables laid by the customer through the threaded cable glands and se-
cure. Connect the wires to the terminal strip according to the connection diagram.
Use the
terminal number shown in the connection overview on the cover.
6.5.10 “Extern OFF” connection: Remote
deactivation
CAUTION
Do not apply external voltage!
An external voltage which is applied destroys the component.