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Installation and operating instructions • Wilo-Control EC-L • Ed.04/2022-09
x
Fig. 8:
Connection overview symbol
One thermal motor monitoring device with bimetallic strips can be connected per pump. Do
not connect a PTC sensor!
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.
The number shown in
location “x” on the symbol indicates which pump it refers to:
•
1 = pump 1
•
2 = pump 2
•
3 = pump 3
6.5.5
Leakage detection connection
DANGER
Risk of explosion due to incorrect connection!
If the connected pump is installed in an explosive atmosphere, there is a
risk of explosion due to incorrect connection:
• Switch on ex-mode (menu 5.64)!
• 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.
x
Fig. 9:
Connection overview symbol
Leakage detection that uses a moisture probe can be connected for each pump. The
threshold (< 30 kOhm) for a deactivation is permanently stored in the switchgear. Do not
connect a float switch!
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.
The number shown in
location “x” on the symbol indicates which pump it refers to:
•
1 = pump 1
•
2 = pump 2
•
3 = pump 3
6.5.6
Connection of signal transmitter
for level control device
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.
The level can be measured via the following signal transmitters:
•
Level sensor
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