Check The Direction Of Rotation; Inlet-Port Connection; General Requirements - Edwards E2MO.7 Instruction Manual

4.6.2 Check the direction of rotation

CAUTION:
Ensure that the pump-motor rotates in the correct direction. If it does not, the pump
and the vacuum system can become pressurised.
Refer to
1. Watch the motor-cooling fan through the fan cover on the end of the motor.
2. Switch on the electrical supply to the motor for a few seconds.
3. Check that the motor-cooling fan rotates in the direction shown by the arrow on
the end of the oil box. If the rotation direction is incorrect, immediately switch off
the electrical supply and contact us or your supplier for advice.

4.7 Inlet-port connection

4.7.1 General requirements

To connect the pump to the vacuum system, use either the inlet-port on the top of the
pump (Figure: General view of the pump on page
pump (not shown). To use the side inlet-port, refer to the procedure in
connection on page
When using the top or the side inlet-port:
▪ Connect to the NW10 flange supplied on the pump, use the centring ring and
O‑ring supplied.
▪ Remove the NW10 flange and connect to the 3/8 inch BSP threaded hole.
▪ Remove the NW10 flange and replace it with a NW25 flange adaptor (available as
an optional accessory, see
the NW25 flange.
Take note of the following information when connecting the pump to the vacuum
system. Refer to
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.
▪ If necessary, incorporate flexible bellows in the system pipelines to reduce the
transmission of vibration and to prevent loading of coupling‑joints. If using flexible
bellows, ensure that the bellows which have a maximum pressure rating which is
greater than the highest pressure that can be generated in the system. We
recommend you to use manufacturer's flexible bellows.
▪ Use a suitable inlet‑filter if pumping condensable vapours or if using the pump for
very dusty applications.
▪ Use a suitable valve to isolate the pump from the vacuum system when pumping
condensable vapours or to maintain vacuum when the pump is switched off.
▪ Ensure that sealing surfaces are clean and scratch‑free.
A37132880_F - Installation
Figure: General view of the pump on page
21.
Spares and accessories on page 36
11.
11) or the inlet-port on the side of the
Spares and accessories on page
for details of the accessories
Page 20
Side inlet-port
36) and then connect to