M588-00-880 Issue E
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Maintenance
Wear the appropriate safety clothing when coming into contact with contaminated components. Dismantle
and clean contaminated components inside a fume cupboard.
Re-check the pump rotation direction if the electrical supply has been disconnected.
O-ring replacement intervals vary depending on the application.
Dispose of components, grease and oil safely.
Take care to protect sealing faces from damage.
Do not touch or inhale the thermal breakdown products of fluorinated materials which may be present if the
dry pumping system has been overheated to 260 °C and above. These breakdown products are very
dangerous. Fluorinated materials in the dry pumping system include oils, greases and seals. The dry pumping
system may have overheated if it was misused, if it malfunctioned or if it was in a fire. Edwards Safety Data
Sheets for fluorinated materials used in the pump are available on request.
The dry pumping system requires little operator maintenance between overhauls. Pump protection sensors fitted to
the dry pumping system do not require routine maintenance. The maintenance operations that can be carried out
are described in the following sections. The frequency of maintenance operations depends on the process. Adjust the
frequency of maintenance operations according to user experience.
When maintaining the dry pumping system, use replacement parts, seals and fittings supplied by Edwards, refer to
Section 7. Ensure that the purge gas and cooling water supplies are connected in parallel and that they meet the
specifications given in Section 2. Contact Edwards for more information.
Note: If the pump is controlled by the MCM MicroTIM then all the configuration options for accessories and set
sequences are stored in the MCM MicroTIM and not in the pump. This means that if a replacement pump is
swapped in it will be unnecessary to configure these options again if using the same MCM MicroTIM.
5.2 Relocate the dry pumping system for maintenance
The substances that accumulate in the exhaust pipe, elbow and check valve can be dangerous. Do
not allow these substances to come into contact with skin or eyes. Do not inhale vapours from
these substances. Fit blanking caps to the inlet and outlet flanges when moving the exhaust pipe,
elbow or check valve around the workplace.
The majority of synthetic oils/grease can cause inflammation of the skin (dermatitis). Safety
precautions must be taken to prevent prolonged skin contact with these substances. Use of
suitable protective gloves and clothing along with a respirator is recommended if contact with the
substance is anticipated. System process gases and residue can be highly toxic. Take all necessary
precautions when handling components that have, or could have, come into contact with them,
including O-rings, lubricants and all exhaust accessories.
Suitable lifting equipment must be used to move the dry pumping system. It is too heavy to lift by
hand.
Remove bulky accessories such as inlet filters, silencers and knock out pots before moving the dry
pumping system because they can make the dry pumping system unstable. Do not exceed the
topple angle of 10 ° when moving the pump.
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