© Edwards Limited 2009. All rights reserved.
Page 5
Edwards and the Edwards logo are trademarks of Edwards Limited.
INSTALLATION
A504-33-880 Issue C
3
INSTALLATION
1. Switch off the pump and electrically isolate motor.
2. Shutdown the vacuum system.
3. Drain the rotary pump oil into a suitable size container.
4. Undo and remove the eight cap screws and shakeproof washers securing the existing sight glass bezel assembly
to the oil box.
5. Carefully withdraw the sight glass bezel, sight glass and moulded rubber gasket. Note which way round the
moulded rubber gasket is fitted.
6. Clean off all mating surfaces.
7. Take bezel and insert four new longer cup screws and shakeproof washers at the corners of the bezel.
8. Fit sight glass within moulded rubber gasket and offer up with glass to the sight glass bezel. The glass must be
nearest to the bezel otherwise the moulded rubber gasket will not seal correctly.
PFPE pumps only. Place the red plastic level indicator between glass and oil level monitor.
9. Offer up the oil level monitor over the four screws.
10. Fit the gasket to the oil level monitor.
11. Position the oil level monitor assembly on the oil box and carefully start tightening all four cap screws.
12. Fit the four remaining cap screws and shakeproof washers. Lightly tighten in a diagonal and progressive manner
using a suitable size Allen key.
13. Refill the rotary pump with oil. Run the pump and check for leaks at its normal running temperature.
14. To connect the relevant cables to the electrical plug first detach from the oil level monitor by drawing the
knurled sleeve back and pulling on the plug.
Note:
On refitting it will be necessary to line up the red dots on plug and oil level monitor. Identify these now.
15. Unscrew the cable clamp at the rear of the plug. Pull out the gripper.
Note:
Identify which way round the gripper and cable clamp were located and removed from the socket.
16. Insert the end of an Allen key in the pin end of the plug and apply gentle pressure to the pins. Push out the pin
assembly.
17. Remove the two pin covers noting how they are fitted together.
18. Slide on cable clamp and gripper remembering which way they had been fitted.
Note:
A screened cable must be used.
WARNING
Take extreme care if the oil has been subjected to hazardous contamination.
WARNING
Process gas must only be pumped when the operator is satisfied that a leak tight joint has been
achieved.
