A708-01-880 Issue E
Page 36 © Edwards Limited 2013. All rights reserved.
Edwards and the Edwards logo are trademarks of Edwards Limited.
Installation
1. Refer to Figure 1, 2 or 3. Remove the cover plates fitted to the pump inlet (6) and pump outlet (16).
2. Watch the motor fan (21) while switching on the pump for one or two seconds, then switch the pump off. Note
that the correct direction of rotation (which is shown by an arrow on the coupling cover) is clockwise, when
viewed from the motor end of the pump.
3. If the motor fan does not rotate in the correct direction:
z Isolate the pump from the electrical supply.
z Reverse any two of the electrical supply phase-wires in the pump motor terminal box: refer to the motor
manual supplied with the pump.
4. Repeat Steps 2 and 3 to ensure that the direction of rotation is now correct.
3.13 Connect the cooling water supply
Refer to Figure 1, 2 or 3 and connect the cooling water supply as described below. If connecting more than one pump
to the water supply is required, connect the pumps in parallel and not in series.
1. Remove the red blanking caps from the cooling water inlet and outlet connections (19, 15).
2. Fit appropriate pipe fittings (see Section 2.9) to the cooling water supply and return pipes.
3. Fit the pipe fitting on the cooling water supply pipe to the water inlet connection (19), then tighten the
connection.
4. Fit the pipe fitting on the cooling water return pipe to the water outlet connection (15), then tighten the
connection.
3.14 Connect the shaft-seals purge gas supply
Ensure that the pump direction of rotation is correct before operating the pump. If not, and the
pump rotation is incorrect, the inlet pipeline will be pressurised and may be damaged and there
will be a risk of injury to people or explosion or fire.
The shaft-seals purge gas supply pressure must comply with the requirements of Section 2.6. If
not, the shaft-seals purge may not operate correctly, or the purge pipelines may become over-
pressurised and may explode.
If the CDX pump is part of an ATEX Category 1 system, or part of any system which handles
flammable gases in their flammable range, the shaft-seals purge is safety critical, and the purge
supply cannot be interrupted during operation. Refer to the ATEX system instruction manual for
further details.
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