Installation; Safety - Edwards RV3 Instruction Manual

5

INSTALLATION

The system as supplied by Edwards is configured for operation as defined in this manual. This is an ATEX approved
system and no modifications may be made to the system and maintenance is restricted to the activities listed in
Section 7. Exceptions to this instruction may invalidate the ATEX certification of the system. If in doubt please
consult Edwards.
5.1

Safety

Obey the safety instructions given below and take note of the appropriate precautions. If you do
not, you can cause injury to people or damage to equipment.
The oil sealed vacuum pumps are supplied with a sealed Gas Ballast. Plugs have been fitted to
prevent flammable atmospheres accidentally entering the pump. If the gas ballast facility is
required, a purge gas must be used, or clean air supplied from a safe area. Failure to obey these
instructions may cause harm, injury or death to persons.
The E1M40, E1M80, E1M175 and E1M275 pumps are supplied with a sealed air bleed. If the air
bleed is required to reduce pump noise, in order to prevent flammable atmospheres entering the
pump, a purge gas must be used, or clean air supplied from a safe area. Failure to obey these
instructions may cause harm, injury or death to persons.
If your pump is certified for IIC external operation, you must only wipe the outside of the pump
with a damp cloth.
Skilled technicians familiar with vacuum equipment must perform the installation of this equipment. Edwards
recommends that you read the Safety Booklet P400-40-100.
To ensure the validity of the ATEX certification, the pump oil box must remain at a positive pressure at all
times. When pumping flammable gases this can be accomplished by providing a constant purge of inert gas
through the gas ballast porting (as described in the specific pump manual) using appropriate ATEX certified
equipment. See Section 6.5 of the safety booklet P400-40-100 for details on how to avoid the flammable
zone.
In the event of an exhaust line becoming blocked, there is a possibility of the inlet side of the pump and any
process volume attached to it, being pressurised. Such a blockage should be prevented.
All lifting operations must be carried out using the identified lifting points and appropriate equipment and
techniques.
You must connect the additional thermal protection devices as specified in
system will stop if a fault condition occurs.
Where appropriate, the system should be purged to remove harmful process materials. This could occur
before the start of the process and at the end of the process or before shutdown. Failure to do so could lead
to process materials causing corrosion, or an undesired reaction producing materials with a lower auto
ignition temperature than the system is certified to pump.
The pump must not be able to restart until a fault condition has been cleared.
© Edwards Limited 2008. All rights reserved.
Edwards and the Edwards logo are trademarks of Edwards Limited.
WARNING
WARNING
WARNING
WARNING
A652-18-880 Issue C
Section 5.3.3 such that the
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