Wilo Control EC-Booster Installation And Operating Instructions Manual page 18

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6.5.6.1 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. 13: Pump connection
6.5.6.2 Adjust motor current monitoring
Current Pump 1 Current Pump 2
8
Fig. 14: Set the rated motor current at the
potentiometer
18
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!
The minimum and maximum motor current of the connected pumps is monitored:
• Minimum motor current monitoring
The value is permanently stored in the switchgear: 300 mA or 10% of the set motor cur-
rent.
NOTICE! Monitoring can be disabled in Menu 5.69.
• Maximum motor current monitoring
Adjust the value in the switchgear.
NOTICE! Monitoring cannot be disabled!
The maximum motor current is monitored in two different ways:
• Connected pumps with rated current up to 12 A: electronic motor current monitoring
• Connected pumps with rated current greater than 12 A: separate motor protection
switch
Motor current monitoring Wilo-Control EC-B ... for pumps with rated current up to 12 A
After connecting the pumps, set the rated motor current of the pump.
8 Potentiometer for motor current monitoring
Use a screwdriver to set the rated motor current at the respective potentiometer.
NOTICE! "0" setting on the potentiometer leads to an error when the pump is activated!
Precise adjustment of motor current monitoring can be performed during commissioning.
During commissioning, the set and the actual rated motor current can be shown on the dis-
play:
• Currently set value of the motor current monitoring (Menu 4.25 to 4.27)
• Currently measured operating current of the pump (Menu 4.29 to 4.31)
Installation and operating instructions • Wilo-Control EC/ECe-Booster • Ed.02/2023-08