Edwards nEXT730D User Manual

▪ Send the pump to an Edwards Service Centre for a bearing replacement.
▪ Purchase a bearing service kit and replace the bearing on-site (refer to Bearing on-
site main
tenance on page 106).
8.2 Rotor life
The fague life of nEXT Turbomolecular pump rotors is typically 40,000 to 50,000 cycles.
As a precauonary measure, Edwards recommends that pumps are returned for a major
service (rotor replacement) aer 20,000 cycles of acceleraon to full speed and back to
a stop, or aer ten years of use, whichever occurs rst.
8.3 Cleaning the pump
WARNING:
Clean the ext
ernal surfaces of the pump in a well venlated locaon. When using
cleaning soluons and solvents to clean the pump, observe all precauons specied
by the manufacturer. Avoid inhalaon of any parculates which may be present in
the pump.
NOTICE:
Do not aempt t
o clean any parts of the pump other than external surfaces. Organic
solvents may damage internal pump components. Do not use abrasive materials to
clean any part of the pump.
If the inside of the pump is contaminated, it may not be possible to achieve the specied
ulmat
e vacuum performance, or pump-down mes may increase.
In these circumstances the pump must be returned to an Edwards Service Centre where
the pump will be dismantled and cleaned. Refer to Return the equipment or components
for service on page 105.
Any organic solvent can be used to clean the external surfaces of the pump. Edwards
recommend the use of non-CFC solvents such as isopropanol or ethanol. Only a minimal
amount of a cleaning soluon is required which is suitable for the contaminants on the
pump surfaces.
For environmental reasons, keep wastage of cleaning soluons and solvents to a
minimum.
8.4 Decoding service status words
The service status may be accessed directly via the serial link. This method of accessing
service status will give the most complete picture of current and future service
requirements and will allow preventave maintenance acvies to be scheduled.
A summary of the current pending service status is provided in response to the service
status command:
Command
? v 8 8 1 cr
The reply will be as follows:
08/2021 - ©Edwards Limited
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B8J200880_D - Maintenance

Edwards nEXT730D Specifications

General

Brand	Edwards
Model	nEXT730D
Category	Water Pump
Language	English