Edwards A705-41-000, Инструкция по эксплуатации

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A705-40-880 Issue B
Page 64 © Edwards Limited 2011. All rights reserved.
Edwards and the Edwards logo are trademarks of Edwards Limited.
Maintenance
5.16.2 Prepare the pump
1. Shut down the pump and disconnect it from the electrical supply.
2. Refer to Figure 4 . Switch off the shaft-seals purge nitrogen supply, then disconnect the nitrogen supply pipeline
from the nitrogen inlet (7) on the services panel.
3. Switch off your cooling-water supply, then disconnect your cooling-water supply and return pipelines from the
water outlet and inlet connections (3, 5) on the services panel.
4. If the pump has been operating, leave the pump to cool down for at least three hours before you continue at
Section 5.16.3 .
5.16.3 Remove the old service module
1. Disconnect the pump-inlet ( Figure 1 , item 3) from your process system.
2. Refer to Figure 17 . Undo and remove the four bolts (2) which secure the inlet adaptor (3), then remove the inlet
adaptor from the pump and immediately fit a suitable blanking plug to the inlet port on the pump.
3. Disconnect the pump-outlet ( Figure 1 , item 25) from your exhaust system.
4. Undo and remove the seven bolts which secure the exhaust manifold (11), then remove the manifold from the
pump: ensure that you do not damage the spigot joint between the manifold and pump.
5. Immediately fit a suitable blanking plug to the exhaust outlet port on the pump.
6. Remove the motor and the coupling cover from your pump: refer to Section 5.15.1 and 5.15.2 .
7. Remove the coupling hub from your pump.
8. Disconnect the shaft-seals purge pipeline (7) from the two elbow fittings (6).
9. Remove the two elbow fittings from the pump, then immediately fit suitable blanking plugs to the shaft seals
purge ports on the pump.
10. Remove the TCV sensor capillary stainless steel guard (on the top of the high vacuum plate on the top of the
pump, opposite the exhaust outlet). Unscrew the TCV sensor capillary from the brass sensor pocket on the
pump, then unscrew the sensor pocket from the pump.
WARNING
Ensure that you wear the appropriate Personal Protective Equipment (PPE) when you remove the
service module, if the pump has been used with hazardous process substances.
WARNING
Use suitable lifting equipment to move the service module (pump body). If you do not, you can
injure yourself or damage the pump. Refer to
Section 2.3 for the mass of the service module.