7. Maintenance and service
7.1 Gener
al maintenance
The system requires no user maintenance. Maintenance must be done by trained
personnel. The frequency of the maintenance depends on the process and can be
adjusted according to the user experience. Refer to Maintenance plan on page 39 for the
maintenance schedule.
We recommend a monthly visual inspecon of the dry pump system. Check that the
electrical supply cord, hoses and pipelines connected to the pump are in good condion
and are secured properly.
7.2 Maintenance plan
More frequent maintenance may be required if the pump is used to pump aggressive
gases or vapours, solvents, organic substances and acids, or if the pump is operated
connuously at high operang temperature.
Table 15
Maintenance plan
Operaon
Frequency
(months)
Service indi-
cator
Reference
Inspect and clean the inlet
strainer
12 No Inspect and clean the inlet
strainer on page 39
Inspect and clean the exter-
nal fan cover if required
12 No Clean the external fan grill on
page 40
Replace the pump bearings 60 Yes Replace the pump bearings on
page 40
Replace the pump controller 120 Yes Replace the pump controller
on pag
e 40
Electrical safety check 60 No Electrical safety check on pag
e
40
Note:
The pump mus
t be returned to the Service Technology Centre for maintenance. For
service indicator codes, refer to Table: Service indicator codes.
7.3 Inspect and clean the inlet strainer
Whenever the pump is disconnected from the vacuum system or annually:
▪ Remove the inlet strainer from the pump inlet, refer to Figure: nXRi pumps.
▪ Clean the pump inlet and remove the debris that may have accumulated.
▪ Examine the inlet strainer and if necessary, clean it with a cleaning soluon
suitable for the substances pumped.
▪ Install the inlet strainer before you reconnect the pump to the vacuum system.
R
efer to Mechanical installaon on page 20.
05/2021 - ©Edwards Limited
Page 39A90301880_C
A90301880_C - Maintenance and service
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