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maintenance
A533-23-880 Issue C
6
maintenance
6.1
Safety
Only Edwards engineers may maintain the iF pump series. Users can be trained by Edwards to conduct the tasks
described in this manual, contact your local service centre or Edwards for more information.
Safety sensors fitted to the iF system do not require routine maintenance.
Ensure that the maintenance technician is familiar with the safety procedures which relate to the products
pumped. Wear the appropriate safety-clothing when you come into contact with contaminated components.
Dismantle and clean contaminated components inside a fume-cupboard.
Fit a suitable blanking plate on the iF system inlet and your vacuum system as soon as you disconnect the iF
system from your vacuum system. Do not operate the iF system unless the inlet blanking plate is fitted or the
iF system is connected to your vacuum system.
Fit a suitable blanking plate on the iF system exhaust and your exhaust-extraction system as soon as you
disconnect the iF system from your exhaust-extraction system. Do not operate the iF system unless the
exhaust is connected to your exhaust-extraction system.
Allow the pumps to cool to a safe temperature before you fit lifting bolts or start maintenance work.
Vent and purge the iF system with nitrogen before you start any maintenance work.
Isolate the iF system and other components in the process system from the electrical supply so that they can
not be operated accidentally. Note that the emergency stop switch on the iF system is not an electrical
isolator.
Wait for at least four minutes after you have switched off the electrical supply before you touch any
electrical component on the iF system.
Never operate the iF system (even for test purposes) unless a second protective earth (ground) is fitted:
refer to Section 3.15.2.
Recheck the pump rotation direction if the electrical supply has been disconnected.
WARNING
Obey the safety instructions given below and take note of appropriate precautions. If you do not,
you may cause injury to people and damage to equipment.
WARNING
Allow the pump to cool down to a safe temperature before disconnecting or isolating the cooling
water supply. Failure to do so will result in high pressures being generated in the pump cooling
system.
WARNING
Hazardous chemicals may be 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. Personal protective equipment
WARNING
Particular caution should be exercised when working with Fomblin oil which may have been
exposed to temperatures greater than 260
o
C. Refer to Edwards Material Safety Data Sheets for
detailed information.
