Edwards 9773512584, Instruction Manual

Page: 73 / 180

5.2 Relocate the dry pumping system for maintenance
WARNING:
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.
WARNING:
Suitable lifting equipment must be used to move the dry pumping system. It is too
heavy to lift by hand.
WARNING:
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.
CAUTION:
Drain the cooling water from the dry pumping system if transporting or storing it in
conditions where the cooling water could freeze. Failure to do so could result in the
cooling water freezing in the dry pumping system and damage occurring to the
pumps and/or the cooling water pipelines.
To remove the dry pumping system from its operating location and move it to another
location to carry out maintenance, use the following procedure:
1. Purge the dry pumping system and shutdown as described in Operation on page 54
and allow the dry pumping system to cool down.
2. Isolate the power and then disconnect the mating half from the electrical supply
connector, then isolate the water and the gas purge supply.
3. Disconnect the purge gas supply, taking care as any trapped gas under pressure is
released. Disconnect the cooling water supply followed by the cooling water
return.
4. Disconnect the inlet and outlet from the vacuum and exhaust systems, remove
bulky accessories such as filters, silencers and knock out pots and then fit the
blanking caps.
5. If necessary, disconnect any other accessories from the dry pumping system.
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M58800880_H - Maintenance