16
Installation
Fig. 7:
Motor coil and connecting plate of Star Connection (for high voltage)
Visual inspection of the direction of rotation
Check the direction of rotation of the pump after switching on for the first time:
– To do this, switch the pump briefly ON and OFF again (for a max. of 5 seconds).
Compare the direction of rotation of the motor and the motor ventilator with the direc-
tional arrow on the housing cover.
– Looking from the motor side, the correct direction of rotation is to the right in a clock-
wise direction.
If the direction of rotation is incorrect: Swap two of the three phase contacts at the con-
necting cable.
Fig. 8:
Checking the direction of rotation
Motor protection
With PTC temperature sensors (3PTC)
Pump motors equipped with PTC temperature sensors (3PTC) in the stator windings can
be connected to a PTC resistor tripping device for protection against overload. Other ap-
proved motor temperature monitoring can be used also by the operator.
Tripping devices store the shutdown event and need to be manually switched back on
again via the integrated RESET button or via the external RESET S3. Mains-ON is de-
tected as an automatic RESET.
Set up the connections so that the directional rotation indicated on the pump is main-
tained, regardless of the representations in the current flow diagram.
W2
U1
L1
V2
V1
W1
U2
L3
L2
W2 U2 V2
U1 V1
W1
L1
L2
L3