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10. Air-cooled machines must be installed in such a way that an adequate flow of cooling air is available
and that the exhausted air does not recirculate to the vacuum/overpressure pump air inlet of the
vacuum relief valve or cooling air inlet.
11. The electrical connections must correspond to the applicable codes. The machines must be earthed
and protected against short circuits by fuses in all phases. A lockable power isolating switch must be
installed near the vacuum/overpressure pump.
12. On machines with automatic start/stop system or if the automatic restart function after voltage
failure is activated, a sign stating "This machine may start without warning" must be affixed near the
instrument panel.
13. In multiple vacuum/overpressure pump systems, manual valves must be installed to isolate each
pump. Non-return valves (check valves) must not be relied upon for isolating multiple systems.
14. Never remove or tamper with the safety devices, guards or insulation fitted on the machine.
15. Piping or other parts with a temperature that exceeds 70°C (158°F) and which may be accidentally
touched by personnel in normal operation must be guarded or insulated. Other high temperature
piping must be clearly marked.
16. If the ground is not leveled or can be subject to variable inclination, consult the manufacturer.
17. Whenever air containing hazardous substances are sucked in (that is, biological or microbiological
agents), use abatement systems placed upstream of the vacuum/overpressure pump.
18. Any pump placed in an application with inlet gas stream temperatures above the published maximum
temperature should be approved by Edwards prior to start-up.
Note:
Also consult following safety precautions: Safety precautions during operation and Safety
precautions during maintenance or repair.
These precautions apply to machinery processing or consuming air or inert gas.
Processing of any other gas requires additional safety precautions typical to the application which
are not included herein.
Some precautions are general and cover several machine types and equipment; hence some
statements may not apply to your machine.
1.4
Safety precautions during operation
All responsibility for any damage or injury resulting from neglecting these precautions, or non-observance
of the normal caution and care required for installation, operation, maintenance and repair, even if not
expressly stated, will be disclaimed by the manufacturer.
1.
Never touch any piping or components of the pump during operation.
2.
Use only the correct type and size of hose end fittings and connections. Make sure that a hose is
fully depressurized before disconnecting it.
3.
Persons switching on remotely controlled machines shall take adequate precautions to ensure that
there is no one checking or working on the machine. To this end, a suitable notice shall be affixed
to the remote start equipment.
4.
Never operate the machine when there is a possibility of taking inflammable or toxic fumes, vapors
or particles.
5.
Never operate the machine below or in excess of its limit ratings.
6.
Keep all bodywork panels shut during operation. The panels may be opened for short periods only,
for example, to carry out routine checks. Wear ear protectors when opening a panel. On
vacuum/overpressure pumps without bodywork, wear ear protection in the vicinity of the machine.
7.
People staying in environments or rooms where the sound pressure level reaches or exceeds 80
© Edwards Limited 2016. All rights reserved.
Edwards and the Edwards logo are trademarks of Edwards Limited.
CAUTION
6996 0223 96 Issue A
Page 7
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