Edwards EDS 300

CAUTION: HIGH NOISE LEVELS
Hearing loss due to high noise level. Depending on the operang condions, higher noise
levels can be achieved than specied in the technical data. Take suitable hearing
protecon measures.
8.1 Media compability
See Normal operaon
(on page 24)
. For a list of materials in contact with the process gas,
see Technical data
(on page 17)
.
If you use the system on an applicaon for which it is not suitable, you may invalidate your
warranes. If in doubt, contact Edwards.
8.2 Start-up
1.
Ensure that any isolaon valves in the process pipework are in the correct posions
(exhaust must be open).
2.
Switch on the cooling water for water cooled pumps. For air cooled pumps ensure the
heat exchanger fan is powered and running.
3. Switch on or open the purge gas supply line and ensure right seng. Refer to
Connecng purge gas
(on page 29)
.
4.
Start the EDS pump by switching on the electrical supply.
The pump is ready for process when the stator temperature, measured next to the stator
thermal switch, reaches 40°C. (note this process-ready temperature may be dierent,
depending on your applicaon)
8.3 Manual shut-down
1. Close the pump-inlet isolaon-valve (if ed).
2. Leave the EDS pump operang for sucient me such that the pump is thoroughly
purged of any process gases. If condensable uids have been pumped, operate the EDS
pump for at least 40 minutes with all purges on.
3.
Switch o the EDS pump.
4. Close or switch o the purge gas supply line.
5.
For water cooled pumps only keep the water cooling on for 10 minutes, then switch o
the cooling water.
NOTICE:
If you switch o water-cooling by closing both cooling-water inlet and outlet,
temperature may rise and result in unacceptable high water pressure and the water
circuit may leak.
8.4 Unplanned shut-down and alarms
Refer to Pump body thermal snap switch
(on page 34)
for instrument trip points.
If the pump stops unexpectedly whilst processing corrosive or condensable vapours
internally, it must be fully purged for sucient me to ensure it is free of corrosives or
liquids. Otherwise the pump may corrode and be damaged.
Page 37
A41802880_C - Operaon