VACUUBRAND BVC 21 NT VARIO - Manual (Page 8)

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.: 999157 / 10/12/2009
page 8 of 31
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 du-
rability of 40000 h. Motor capacitors have a typical durability in the range of 10000
to 40000 h depending strongly on the operation conditions like ambient temperature,
humidity or load.
• Check every motor capacitor regularly by measuring its capacity and estimating
its operation time. Exchange old capacitors early enough to prevent a failure. If
an overaged motor capacitor fails it might get hot and even melt and may cause
a flame to form which could be dangerous for persons and equipment in the
vicinity. Motor capacitors have to be replaced by an electrician.
➨ Before starting maintenance vent the system, switch off the device and isolate
the equipment from the electrical supply. Isolate equipment from mains before
removing the cover!
➨ Before starting maintenance, isolate the equipment from mains and wait two min-
utes 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 noxious or otherwise danger-
ous process chemicals that 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. Wear appropriate safety-clothing when you come in contact with con-
taminated components.
• Before starting maintenance vent the system and allow sufficient cooling of the
pump.
• Drain condensate, if applicable. Avoid the release of pollutants.
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.
NOTICE