Maintenance; Safety And Maintenance Frequency - Edwards iXL120N Instruction Manual

5

Maintenance

Isolate the electrical supply before working on the equipment.
Having isolated the electrical supply from the pumping system, wait for at least 4 minutes for the
equipment's capacitors to discharge to safe voltage levels (<50 V) before disconnecting the
electrical supply cable.
Only personnel specially trained to perform electrical maintenance should attempt
troubleshooting inside electrical enclosures. These enclosures contain hazardous voltages and are
not operator areas.
Leak test the system after maintenance and seal any leaks found to prevent leakage of dangerous
substances out of the system and leakage of air into the system.
5.1

Safety and maintenance frequency

Electrical, nitrogen and water supplies are all potentially hazardous energy sources. Before
carrying out any maintenance the supply of these sources should be locked and tagged out.
Personal protection equipment should be checked and used as specified by its supplier. Hazardous
chemicals that have been pumped are located within the pumps and piping. Use of suitable
protective gloves and clothing along with a respirator is recommended if contact with substances
is anticipated.
Particular caution should be exercised when working with Fomblin
materials such as some seal materials which may have been exposed to temperatures greater than
260 °C. Refer to Edwards Material Safety Data Sheets for detailed information.
Ensure that the maintenance technician is familiar with the safety procedures which relate to the process

products pumped.
Allow the pumps to cool to a safe temperature before you fit lifting brackets or start maintenance work.

Vent and purge the dry pumping system with nitrogen before you start any maintenance work.

Isolate the dry pumping system and other components in the process system from the electrical supply so

that they cannot be operated accidentally. Note that the emergency stop function on the dry pumping
system is not an electrical isolator, unless a disconnect box accessory is installed.
© Edwards Limited 2010. All rights reserved.
Edwards and the Edwards logo are trademarks of Edwards Limited.
WARNING
WARNING
WARNING
WARNING
WARNING
WARNING
A541-11-880 Issue A
®
oil and other fluorocarbon
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