2. Check the power supply voltage and frequency. If necessary, configure the motor(the
terminal wires and any links) to operate the motor at the user's power supply voltage.
Refer to the wiring instructions supplied with the pump motor.
3. Connect the cable core to the suitable terminal, according to the wiring diagram inside
the terminal box cover.
4. Tighten the cable gland and install the terminal box cover.
3.6 Check the direction of pump rotation
WARNING
Block the inlet or connect the pump to the vacuum system before checking
the direction of pump rotation. If not, there is a danger of objects being
trapped in the rotating rotors.
The three-phase power supply to the motor has the possibility of connecting the wrong phase.
If the power supply is phased incorrectly, the rotor will reverse or not rotate. Check the
direction of rotation as described below:
1. Check if the pump is connected to the vacuum system or that the inlet is blocked.
2. Connect and switch on the backing pump.
3. The motor fan cover is marked with the correct direction of rotation arrow. Turn on the
pump for two or three seconds, then turn off the pump to see if the motor fan rotates in
the same direction as the label. If the directions are the same, the motor power supply is
wired correctly. If reversed, the motor power supply wiring is wrong. Then turn off the
backing pump and deflate the system, disconnect the pump from the power supply, and
align the wiring pairs of any two phases in the motor terminal box. Repeat steps 2 and 3
above to confirm that the motor is rotating in the correct direction.
3.7 Connect the pump inlet and outlet
WARNING
In the course of commissioning, if particles, debris or loose parts are could
enter the pump, a suitable inlet filter must be installed. The user can remove
the filter before the pump is put into operation.
WARNING
If the user installs an isolation valve between the pump and the backing
pump, the valve must be interlocked with the pump so that the pump can be
shut down when the valve is closed.
