5 Maintenance
During all maintenance and servicing work on the pump, the pump must
be disconnected from all sources of electrical power. The pump must be
reliably prevented from running up inadvertently (lockout/tag out).
All work within the pump should be left to suitably trained staff. In this con-
text we would like to inform you about practical seminars offered by
Leybold in which maintenance, repair and testing of the SP 250 are cov-
ered by qualified instructors. Improperly performed maintenance or repair
work will void the CE and ATEX conformity and void any warranty claims.
In the case of ATEX applications, an electrically conducting link between
pump chamber cover, discharge flange and the housing is absolutely man-
datory! After having worked on the pump chamber this connection must
be checked. For this use a suitable measuring instrument and measure the
resistance of the connection which must be less than 100 Ohm.
Gas must not flow backwards through the pump since this might cause
the rotors to turn. For this reason always vent the vacuum chamber to
exhaust pressure or ensure, by installing suitable valves, that the vacuum
chamber and the lines will be separated reliably from the pump.
If the pump has been pumping harmful substances, determine the nature
of hazard and introduce suitable safety measures.
Never operate the pump with an opened pump chamber or fan cover.
There is a risk of suffering injury.
Dote that the surface of the pump can get hot. Leave the pump to cool
down or wear suitable protective clothing.
When disposing of waste oil and used oil filters observe the applicable
environment protection regulations.
Use only original spare parts from Leybold.
WARNING
NOTICE
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