5 MAINTENANCE
Note: You must maintain the pump as described in this section. If you do not, the pump performance
may be poor or the pump may fail prematurely.
5.1 Introduction
The ESDP12 and ESDP30 pumps are designed to require little user maintenance. Do the
following checks when you maintain your vacuum system:
• Check that the vacuum connections are secure.
• Check that the electrical connections are secure and that the electrical cable is not damaged.
• Check that the cooling-fins on the pump are not obstructed or blocked.
5.2 Remove debris from the pump
We recommend that you operate the pump at atmospheric pressure for one minute twice a week,
to remove any debris that may have accumulated in the pump.
5.3 Inspect the inlet screen
Whenever you disconnect the pump from your vacuum system, we recommend that you:
• Remove any debris trapped by the inlet screen (in the inlet-port).
• Inspect the inlet screen and if necessary, clean it with a cleaning solution suitable for the
substances pumped. To remove the inlet screen, remove the circlip which secures the inlet
screen in the inlet-port. Refit the inlet screen in the inlet-port and secure with the circlip
before you reconnect the pump to your vacuum system.
5.4 Service the pump
Note: The service interval stated below assumes that the average ambient operating temperature of the
pump is 25
o
C. Halve the interval between services for every increase in average ambient operating
temperature of 10
o
C. For further advice please consult an Edwards service centre.
We recommend that the ESDP12 and ESDP30 pumps are serviced by Edwards service engineers
at least once a year (if the pumps are in continuous use) or every 8500 hours of pump operation;
contact your supplier or Edwards to arrange these services.
ESDP12 and ESDP30 Scroll Pumps 23
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