© Edwards Limited 2012. All rights reserved.
Page 47
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Maintenance
M561-00-880 Issue C
CAUTION
Drain the cooling-water from the system if you will transport or store it in conditions where the cooling-water
could freeze. If you do not, cooling-water may freeze in the system and damage the pump(s) and/or the cooling-
water pipelines.
If you want to remove the system from its operating location and move it to another location where you will do
maintenance, use the following procedure:
1. Purge the system and shut down as described in
Section 4
and allow the system to cool down.
2. Isolate the power and then disconnect the mating-half from the electrical supply connector, then isolate the
water and the gas purge supply.
3. Switch off your nitrogen and cooling water supplies. Disconnect the nitrogen supply, taking care as any trapped
gas under pressure is released. Disconnect the cooling-water supply followed by the cooling-water return.
4. Disconnect the inlet and outlet from the vacuum and exhaust systems and fit blanking caps.
5. If necessary, disconnect the air-extraction port from your factory extraction system.
6. If necessary disconnect any accessories from the system.
7. Adjust the levelling feet so that the system rests on the castors.
8. Move the system to the location where you will do maintenance.
After maintenance is complete, re-install the system as described in
Section 3
.
5.3
Draining the cooling water
1. Relocate the system for maintenance as stated in
Section 5.2
.
WARNING
Do not exceed the topple angle of 10 ° when moving the pump. Wheel the system on its castors to
move it into its operating position. The system should only be wheeled short distances over flat
surfaces. If the floor surface is uneven or has obstacles the system should be lifted with suitable
lifting equipment. If lifting the system is impractical, or there are other site difficulties, please
consult Edwards for further advice.
WARNING
Use of suitable protective gloves and eye protection is recommended when carrying out this
procedure. Personal protective equipment should be checked and used as specified by its supplier.
WARNING
The exhaust of T variant systems will heat up as soon as the electrical supply is switched on.
