5.4 Establishing mains connection
WARNING
Danger of injury from electric shock
Contact with live parts causes electric shock.
► Make sure that connection leads are voltage-free.
► Make sure that electrical installations are only carried out by qualified electricians.
► Provide adequate grounding for the device.
CAUTION
Danger of injury from moving parts!
After a power failure or a standstill as a result of overheating, the motor restarts automatically.
► Safely disconnect motor from the mains.
► Secure motor against reactivation.
► Dismantle the pump for inspection, away from the system if necessary.
NOTICE
Risk of damage from excess voltage!
Incorrect or excessive mains voltage will destroy the motor.
► Always observe the motor rating plate specifications.
► Route the mains connection in accordance with locally applicable provisions.
► Always provide a suitable mains fuse to protect the motor and supply cable in the event of a fault.
–
Recommendation
: Line circuit breaker type “K” with slow tripping characteristic.
NOTICE
Danger of magnetic coupling overload!
Energy-efficient motors have a higher starting torque that may lead to cranking of the motor and to
the demagnetization of the magnetic coupling.
► During operation with an IE2 motor, we
recommend
starting up with a soft start relay, or operat-
ing the pump with a frequency converter.
► When operating with an IE3 motor, you
must
use a soft start relay or operate the pump with a
frequency converter.
Depending on the pump type, different motor designs or mains voltages can be used:
● Three phase motor without switch and mains cable with 3TF
5.4.1 Three phase motor with 6-pin terminal board
NOTICE
Risk of damage from high starting torque!
The specific load behavior of the pump requires a direct start-up.
► Always start the motor directly; do not use a star-delta starting circuit.
Ports U1 – L2, V1 – L1 and W1 – L3 rotate the motor shaft clockwise when looking at the motor fan.
Installation
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