Edwards nXDS Series User Manual

A735-01-880 Issue C
Page 30 © Edwards Limited 2017. All rights reserved.
Edwards and the Edwards logo are trademarks of Edwards Limited.
Maintenance
5.2 Maintenance plan
More frequent maintenance may be required if the pump is used to pump aggressive gases or vapours, such as
solvents, organic substances and acids, or if the pump is operated continuously at the higher end of its operating
temperature.
For service indicator codes, refer to Section 5.10.
5.3 Inspect and clean the inlet strainer
Whenever the pump is disconnected from the vacuum system, or on an annual basis, Edwards recommends:
 Removing the inlet strainer from the pump inlet (refer to Figure 1) and remove any debris that may have
accumulated.
 Inspecting the inlet strainer and if necessary, clean it with a cleaning solution suitable for the substances
pumped. Refit the inlet strainer before reconnecting the pump to the vacuum system. Refer to Section 3.5.
5.4 Clean the external fan cover
If the fan cover is not kept clean, the air flow over the pump can be restricted and the pump may overheat.
1. Switch off the pump and disconnect it from the electrical supply.
2. Use a dry cloth and a soft brush to remove dirt and deposits from the fan cover.
5.5 Check the pump performance (service indicator)
The service indicator, (flashing ON 1s / OFF 1s) is triggered as a reminder to check the performance of the pump.
The service indicator will flash to indicate that a tip-seal change may be required (based on typical tip-seal life). If
after checking, the pump is no longer achieving the required performance, Edwards recommends carrying out a tip-
seal replacement (refer to Section 5.10).
If however the pump performance is still within acceptable limits, or is performing satisfactorily, the tip-seal
replacement can be delayed.
If operating a preventative maintenance plan, depending upon the particular regime, a tip-seal change can be carried
out at this time irrespective of the pump performance.
To reset the service indicator, refer to Section 5.10.
Table 13 - Maintenance plan
Operation
Frequency
(months)
Service
indicator
Section
reference
Inspect and clean the inlet strainer 12 No 5.3
Inspect and clean the external fan cover if required 12 No 5.4
Check the pump performance 30 Yes 5.5
Replace the pump bearings 60 Yes 5.6
Replace the pump controller 120 Yes 5.6
Electrical safety check 60 No 5.8

Edwards nXDS Series Specifications

General

Brand	Edwards
Model	nXDS Series
Category	Water Pump
Language	English