A366-04-880 Issue A
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Installation
We recommend that you connect the electrical supply to the motor through a starter or circuit breaker which has
thermal over-current protection which can be adjusted to suit the full-load current ratings shown on the motor rating
plate. The fuse ratings must be calculated by a qualified electrical engineer. The supplier of your thermal over-
current protection device may specify fuse ratings to ensure correct operation of the over-current protection device.
Ensure that the fuse you use is suitable for the rated currents given on the motor rating plate.
1. Remove the cover from the motor terminal-box.
2. Check your electrical supply voltage and frequency. If necessary, configure the motor to operate with your
electrical supply. For motor wiring information refer to the wiring diagram supplied in the motor terminal box.
3. Remove the plugs from the cable-entry hole that you will use for the electrical supply cable. Choose the most
suitable hole for your application.
4. Fit a suitable cable-gland and nut to the entry hole. After the supply cable is fitted, the cable-gland must be a
protective seal to the standard of IP55 in IEC 529 or better.
5. Pass the motor electrical supply cable through the cable-gland.
6. Connect the cables to the terminals as shown in the wiring diagram supplied in the motor terminal box.
3.7.2 Check the direction of rotation
Ensure that the pump-motor rotates in the correct direction. If it does not, the pump and your vacuum system
can become pressurised.
1. Watch the motor cooling-fan through the motor fan-cover.
2. Switch-on the electrical supply to the motor for a few seconds and switch off.
3. Check that the motor cooling-fan rotates in the direction shown by the arrow on the motor mounting-plate. If
the direction of rotation is incorrect:
Isolate the pump from the electrical supply.
Remove the terminal-box cover and swap wires L1 and L3. Refer to the wiring diagram supplied in the motor
terminal box.
Refit the cover to the terminal-box.
Connect the pump to the electrical supply.
Check the direction of rotation again.
3.8 Connect the pump inlet to your system
Connect your vacuum system to the inlet-port (Figure 1, item 5). Use standard 63 mm fittings when you connect the
pump.
Take note of the following information when you connect the pump to your vacuum system. Refer to Section 7 for
details of the accessories mentioned below.
For optimum pumping speeds, ensure that the pipeline connected to the inlet-port is as short as possible and
has an internal diameter not less than the inlet-port diameter.
Support the vacuum pipelines to prevent loading of the coupling-joints.
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