Edwards GXS 160

M588-00-880 Issue E
Page 48 © Edwards Limited 2015. All rights reserved.
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Operation
4.8 Restart the pump after an emergency stop or automatic shut
down
Note: If the dry pumping system has automatically shut down because of high pump power, check that the pump
is free to rotate before restarting the dry pumping system: contact Edwards.
If the emergency stop switch on the front panel has been used to shut down the dry pumping system, the emergency
stop switch must be reset before the dry pumping system can be restarted. Turn the emergency stop switch to reset
it, then restart the dry pumping system as described in Section 4.1.
If the dry pumping system has been automatically shut down because of an alarm condition, the alarm condition must
be rectified before the dry pumping system can be restarted. If the alarm was caused by high pump temperatures,
refer to Section 4.6. Restart the dry pumping system as described in Section 4.1.
4.9 Dry pump clean
The high flow purge and solvent flush kit is available as a factory-fit option to clean the pump mechanism on
applications where large quantities of dust and sticky deposits are encountered. The cleaning process is run while
the pump is in Green Mode/Standby mode and is carried out without the need to remove the pump enclosure. A PDT
is required to initiate the DP clean process. Refer to Table 25 for details.
The DP clean high flow purge and solvent flush procedures can be run as often as required.
4.9.1 High flow purge
Use the following procedure to prepare for the high flow purge:
1. Set up the GXS dry pumping system ready for the high flow purge procedure as described in Section 3.14.
2. Put the pump into Green Mode/Standby mode (refer to Section 4.3).
3. Using the PDT, press the Setup button to enter the setup menu and then select the Command menu. An access
code is needed to enter the Command menu - enter 202 when prompted.
4. Scroll down to the DP clean menu and then press ENTER to select.
5. Select ‘DP clean on’ to start the high flow purge procedure.
The DP clean sequence will run automatically without requiring any operator intervention. Once the DP clean time
has elapsed, the dry pumping system will return back to Green Mode/Standby mode settings. The pump can then be
put back on-process.
To stop the high flow purge process whilst it is running, enter the DP clean menu again using the PDT and select ‘DP
Clean off’.
The DP clean procedure can be configured to suit the user’s application, refer to Appendix A2.9.
Table 25 - DP clean sequence
Sequence Description
Dry pump clean
 Only operates when the pump is running in Green Mode/Standby mode.
 Purge gas or solvent fluid is admitted into the pump for a configurable time period
(default 20 minutes).
 Pump speed during dry pump clean is configurable (default 80 Hz).
 Gas purges may be configured to be on during the clean cycle and/or for a period
after the DP clean valve has closed (default off).
 Pump is not able to go on-process until cycle has completed.
 If dry pump clean is stopped by the user then the purge cycle is completed.
 DP clean may be configured to start automatically when the pump goes off process.