Installation
15
Fig. 6:
Motor coil and connecting plate of Star Connection (for high voltage)
Checking the direction of rotation
The direction of rotation must be checked on pumps with three-phase motors! The direc-
tion of rotation is marked on the pump housing by an arrow.
Remove the locking cap from the exhaust flange.
Slacken
V-belt.
Switch on the motor briefly (2 to 3 sec.).
– Motor belt pulley turn in a clockwise direction (see the arrow on the pump housing).
If the direction of rotation is incorrect: Swap two phase contacts at the connecting ca-
ble.
Fill up the operating fluid.
Refit belts and guards
.
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
NOTICE
Do not start with star/delta connection.
Always start motor directly.
CAUTION
Destruction of or damage to the pump!
The pump can be destroyed if the direction of the motor rotation is incorrect.
Remove V-belts and check direction of rotation prior to commissioning the pump.
CAUTION
Operating fluids may leak out!
If the direction of rotation is incorrect, there is a danger that operating fluids may leak at
the vacuum flange.
Always check the direction of rotation before filling in operating fluid.