User guide

page 11 of 61
Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check carefully
the validity of this document with respect to his product. Manual-no.: 999248 / 28/04/2011
1.7 Maintenance and repair
Wear parts have to be replaced regularly. In case of normal wear the lifetime of the
diaphragms and valves is > 10000 operating hours. Bearings have a typical durability
of 40000 h.
➨ Isolate equipment from mains and wait two minutes before starting mainte-
nance to allow the capacitors to discharge.
☞ Ensure that the pump cannot be operated accidentally. Never operate the pump
if covers or other parts of the pump are disassembled. Never operate a defective
or damaged pump.
☞ Attention: The pump might be contaminated with process chemicals which have
been pumped during operation. Ensure that the pump is decontaminated before
maintenanceandtakeadequateprecautionstoprotectpeoplefromtheeffectsof
dangerous substances if contamination has occurred.
• Beforestartingmaintenanceventthepump,isolatethepumpandothercompo-
nentsfromthevacuumsystem.Allowsufcientcoolingofthepump.
NOTICE
Ensure that maintenance is done only by suitably trained and supervised techni-
cians. Ensure that the maintenance technician is familiar with the safety procedures
which relate to the products processed by the pumping system.
In order to comply with law (occupational, health and safety regulations, safety at
worklawandregulationsforenvironmentalprotection)vacuumpumps,components
and measuring instruments returned to the manufacturer can be repaired only when
certain procedures (see section ”Notes on return to the factory”) are followed.