© Edwards Limited 2008. All rights reserved. Page 19
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MAINTENANCE
A652-18-880 Issue C
7 MAINTENANCE
7.1 Safety information
Before carrying out any maintenance work, observe the following:
z The system must be allowed to cool for a minimum of 3 hours and any pressure or vacuum eliminated or
isolated before attempting any maintenance work.
z Isolate the system from any electrical supply before attempting any maintenance work.
z Ensure that the system has been thoroughly purged of process material before attempting any maintenance
work.
Maintenance of the equipment is mandatory to maintain ATEX certification. Each pump will have an instruction
manual and the maintenance requirements in these manuals are mandatory for ATEX systems.
7.2 Maintenance plan
z For pump only maintenance, please refer to the specific pump manual.
z Any motor repair work must be carried out by trained personnel. Please refer to the supplied motor
manufacturer’s manual.
z For the ATEX coupling maintenance, please refer to the supplied coupling manufacturer’s manual.
WARNING
Obey the safety and maintenance instructions and take note of appropriate precautions. Failure
to do this will compromise the ATEX certification and may cause harm, injury or death to persons.
WARNING
Particular care must be taken to adhere to the maintenance plan of the RV3, 5, 8, 12 and E1M/
E2M18/28 pumps. In particular ensure that the flexible coupling is changed as specified in Section
5 of the pump manual. Failure to do this will compromise the ATEX certification and may cause
harm injury or death to persons. (For maintenance of E1M/E2M/40/80/175/275 ATEX coupling,
please see Section 7.3).
WARNING
To ensure seal integrity of the pump following any maintenance, you need to ensure that the oil
box gasket is positioned correctly and that the bolts are torqued to the figures stated in Table 8 in
Section 7.2. The pump should be run and when the operating temperature has been achieved, the
ultimate pressure must be checked to verify that the pump is functioning correctly. Failure to do
this will compromise the ATEX certification and may cause harm, injury or death to persons.
WARNING
If your pump is certified for IIC external operation, you must only wipe the outside of the pump
with a damp cloth.
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