Wilo Control EC-L1 Series Installation And Operating Instructions Manual page 17

6.5.3.1 Connect pump(s)
1 3 5 13 A1
L1 L2 L3 NO
5
T1 T2 T3
2 4 6 14 A2
L1 L2 L3
M
3~
L N
M
1~
Fig. 6: Pump connection
6.5.3.2 Adjust motor current monitoring
Current Pump 1 Current Pump 2
8
Fig. 7: Adjust motor current monitoring
6.5.4 Connection, thermal motor monit-
oring
Installation and operating instructions • Wilo-Control EC-L • Ed.04/2022-09
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.
3 Terminal strip: Earth (PE)
5 Contactor
Insert the connection cable laid by the customer through the threaded cable glands and se-
3 cure. Connect the wires to the contactor as per the connection diagram.
NOTICE! After all pumps have been connected, set the motor current monitoring!
Set the permissible rated current after connecting the pump.
8 Potentiometer for motor current monitoring
Set the motor current on the respective potentiometer with a screwdriver:
• At full load, set the rated current in accordance with the rating plate.
• At partial load, set the rated current 5 % above the current measured at the duty point.
The motor current monitoring can be fine tuned during commissioning. The actual motor
current can be displayed during commissioning:
• Currently set rated current of the motor monitoring (menu 4.25 ... 4.27)
• Currently measured operating current of the pump (menu 4.29 ... 4.31)
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.
en
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