B580-65-880 Issue G
Page 56 © Edwards Limited 2008. All rights reserved.
Edwards and the Edwards logo are trademarks of Edwards Limited.
VRX vent - restrictor
10.3.3 Fit the vent-restrictor
Use the following procedure to fit the vent-restrictor to an EXT pump:
1. Switch off the pump, isolate the pump controller from the electrical supply (on an EXT DX pump, isolate the
podule from the electrical supply), and wait until the pump has stopped rotating.
2. Remove the vent-valve or plug from the EXT pump, or disconnect the vacuum connections from the purge port as
appropriate.
3. Refer to Figure 31. If a vent-restrictor is already fitted, fit a suitable M3 screw into the M3 tapped hole (2) in the
restrictor, then pull the screw to remove the old vent-restrictor.
4. Fit a suitable M3 screw to the new restrictor and push the new restrictor fully into the vent-port or purge-port of
the EXT pump.
5. Remove the M3 screw and refit the vent-valve or plug, or reconnect the vacuum connections to the purge-port.
Figure 31 - VRX vent-restrictor
Before you install the accessory, ensure that you switch off the pump and isolate the controller/
podule as described below.
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