© Edwards Limited 2014. All rights reserved.
Page 21
Edwards and the Edwards logo are trade marks of Edwards Limited.
Maintenance
A652–07–880 Issue D
5
Maintenance
5.1
Safety
Ensure that maintenance is done by a suitably trained and supervised technician. Obey local and national
safety requirements.
Ensure that the maintenance technician is familiar with the safety procedures which relate to the pump oil
and the products processed by the pumping system.
Check that all required parts are available and of the correct type before starting work.
Isolate the pump and other components from the electrical supply so that they cannot be operated
accidentally.
Allow the pump to cool for at least 3 hours before starting maintenance work. Make sure the pump is
switched off in case the thermal overload device restarts the pump.
Do not reuse O-rings and seals.
After maintenance is completed, recheck the direction of pump rotation if the electrical supply has been
disconnected.
The pump, pump-oil, inlet catchpot, outlet oil mist filter and gas ballast oil return kit will be contaminated
with the process chemicals that have been pumped during operation. Ensure that the pump is
decontaminated before maintenance and that adequate precautions are taken to protect people from the
effects of dangerous substances.
Do not touch or inhale the thermal breakdown products of fluorinated materials which may be present if the
pump has been heated to 310°C and above. Fluorinated materials are safe in normal use but can decompose
into very dangerous substances (which may include hydrofluoric acid) if they are heated to 310 °C and
above. The pump may have overheated if it was misused or if it was in a fire. Safety Data sheets for
fluorinated materials used in the pump are available on request: contact the supplier or Edwards.
WARNING
Obey the safety instructions in this Section and take note of appropriate precautions. Failure to
observe these instructions may result in injury to people and damage to equipment.
