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1.8

Maintenance and repair

Parts liable to wear have to be replaced regularly. Under typical operating conditions, the projected lifetime of
NOTICE
the diaphragms and valves is > 15000 operating hours. Bearings have a typical durability of 40000 h. Motor capacitors
have a typical durability in the range of 10000 to 40000 h depending strongly on the operating conditions like ambient
temperature, humidity or load.
DANGER
WARNING
Clean polluted surface with a clean, slightly moistened cloth. To moisten the cloth we recommend water or mild soap.
NOTICE
Ensure that maintenance is carried out by suitably trained technicians. 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 cer-
tain procedures (see section "Repair - Maintenance - Return") are followed.
8 · Aspirator · Manual
Never operate the pump if covers or other parts of the pump are disassembDEL. Ensure that the pump cannot be
operated accidentally.
Isolate equipment from power supply before removing the cover!
Before starting maintenance, unplug the equipment and wait 5 seconds to allow the capacitors to discharge.
Attention: The pump might be contaminated with noxious or otherwise dangerous process chemicals that have
been pumped during operation. Ensure that the pump is decontaminated before maintenance.
Take adequate precautions to protect people from the effects of dangerous substances if contamination has occur-
red. Wear appropriate safety-clothing when you come in contact with contaminated components.
Parts liable to wear have to be replaced regularly.
Never operate a defective or damaged pump.
Check every motor capacitor regularly by measuring its capacity and estimating its operation time. Exchange old
capacitors early enough to prevent a failure. When motor capacitors fail, they can get hot enough to melt or cause a
flame which could be dangerous for persons and equipment in the vicinity. Motor capacitors have to be replaced
by an electrician.
B efore starting maintenance, vent the system and allow sufficient cooling of the pump. Drain condensate, if applicable.
Avoid the release of pollutants.
Work on the equipment may be performed only by a qualified person
Work on electrical equipment in particular may be performed only by qualified electricians.

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