A705-74-880 Issue K
Page ii © Edwards Limited 2009. All rights reserved.
Edwards and the Edwards logo are trademarks of Edwards Limited.
Contents
4.3 Check the purge pressures and flows ................................................................................30
4.4 Pump Shut down ........................................................................................................30
5 MAINTENANCE ................................................................................... 31
5.1 Safety .....................................................................................................................31
5.2 Maintenance plan .......................................................................................................31
5.3 Checking and filling the gearbox oil (if necessary) ................................................................32
5.4 Checking and filling the high vacuum bearing oil (if necessary) ................................................33
5.5 Inspect the gas-ballast system ........................................................................................33
5.6 Inspect the pipelines and connections ..............................................................................34
5.7 Inspect the interstage relief (GV410 and GV600 pumps only) ...................................................34
5.8 Change the gearbox oil and clean the oil-level sight-glasses ....................................................36
5.9 High-vacuum bearings oil change ....................................................................................38
5.10 Replace the high vacuum vent filter .................................................................................39
5.11 Flush the cooling jacket ...............................................................................................40
5.12 Replace the interstage relief valve ..................................................................................40
5.13 Pump-motor .............................................................................................................41
5.13.1 Remove the pump-motor ..............................................................................................41
5.13.2 Fit the new pump-motor ...............................................................................................41
5.14 Replace the coupling insert ...........................................................................................43
5.15 Overhaul the pump .....................................................................................................45
5.16 Trouble shooting Guide ................................................................................................45
6 STORAGE AND DISPOSAL ....................................................................... 47
6.1 Storage ...................................................................................................................47
6.2 Disposal ...................................................................................................................47
7 SERVICE, SPARES AND ACCESSORIES ......................................................... 49
7.1 Introduction .............................................................................................................49
7.2 Service ....................................................................................................................49
7.3 Spares and maintenance kits ..........................................................................................49
7.4 Accessories ...............................................................................................................49
7.4.1 Exhaust Silencers .......................................................................................................50
7.4.2 Exhaust-Purge Kit .......................................................................................................50
7.4.3 Booster Connection Kits ...............................................................................................50
7.4.4 Indirect Cooling Kits .................................................................................................... 50
7.4.5 Other accessories .......................................................................................................50
For return of equipment, complete the HS Forms at the end of this manual.
Illustrations
Figure Page
1 GV Pump .................................................................................................................. 3
2 GV Dry Vacuum Pump Dimensions (mm) ............................................................................. 9
3 Schematic Diagram of Recommended Electrical Connections ...................................................16
4 Electrical Connections: 380/415 V, 50 Hz Electrical Supplies ................................................... 17
5 Electrical Connections: 230/460 V, 60 Hz Electrical Supplies ................................................... 19
6 Thermal Snap Switch Connections ...................................................................................21
7 Cooling Schematic ......................................................................................................23
8 Exploded View of the Gas-Ballast Assembly ........................................................................25
9 Exploded View of the Interstage Pressure Relief Valve (GV410 and GV600 Pumps Only) ...................35
10 Oil-Level Sight-Glass and Oil Filler and Drain Ports ...............................................................37
11 High Vacuum Bearings Sight-Glass and Oil Filler and Drain Ports ............................................... 39
12 Exploded View of Pump Motor, Coupling Drive and Coupling Housing .........................................44
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