VACUUBRAND PC 301 - Manual (Page 12)

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.: 999147 / 17/06/2014
page 12 of 40
Check the liquid level in the catchpots regularly and drain condensate in time to
prevent overfilling.
Provide appropriate protective measures to allow for the possibility of failure and
malfunction. The protective measures must also allow for the requirements of the
respective application.
In case of overload, the motor is shut down by a self-hold thermal cutout in the
winding.
Note: Only manual reset is possible. Switch off the pump and disconnect from the
power source. Identify and eliminate the cause of failure. Wait approx. five minutes
before restarting the pump.
• Note: In case of supply voltage below 100V, the lock of the cutout might be
impaired and the pump may restart on its own after sufficient cooling down. Take
appropriate precautions, if an automatic restart of the pump may lead to a danger-
ous situation (e.g., switch off the pump and disconnect from the power source).
Maintenance and repair
In normal use, the lifetime of the diaphragms and valves is typically 15,000 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 operation condi-
tions including ambient temperature, humidity or load.
➨ Ensure that the pump cannot be operated accidentally. Never operate the
pump if covers or other parts of the pump are disassembled.
➨ Switch off the pump. Disconnect the electrical power cord and wait five
seconds before starting maintenance to allow the capacitors to discharge.
➨ Note: The pump may be contaminated with process chemicals, which have been
pumped during operation. Ensure that the pump is completely decontaminated
before maintenance commences.
☞ Take adequate precautions to protect people from the effects of dangerous sub-
stances if contamination has occurred. Use appropriate protective clothing, safe-
ty goggles and protective gloves.
☞ Wear parts have to be replaced regularly.
☞
Never operate a defective or damaged pump.
☞ Check every motor capacitor regularly by measuring its capacity and estimating
its time in operation. Replace old capacitors early enough to prevent a failure in
operation. If an old motor capacitor fails, the capacitor may get hot. It may even
melt or emit a flame, which could be dangerous for persons and equipment in
the vicinity. The capacitors have to be replaced by an electrician.
☞ Vent the pump before starting maintenance. Isolate the pump and other com-
ponents from the vacuum system. Allow sufficient cooling of the pump. Drain
condensate, if applicable.
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 laws (occupational, health and safety regulations, safety at
work law and regulations for environmental protection) vacuum pumps, components
and measuring instruments can only be returned when certain procedures (see sec-
tion „ Notes on return to the factory“) are followed..
NOTICE