VACUUBRAND ME 8S - Manual (Page 15)

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.: 999021 / 07/05/2008
page 11 of 22
Use and operation
Installing in a vacuum system:
☞ Avoid throttling losses by using connecting pipes with large diameter and keeping
them as short as possible.
☞ Reduce the transmission of vibration and prevent loading due to rigid pipelines.
Insert elastic hoses or flexible elements as couplings between the pump and rigid
pipes.
☞ Use a suitable valve to isolate the pump from the vacuum system if you need to
allow the pump to warm up before pumping condensable vapours or if cleaning the
pump before it is switched off.
☞ Connect the exhaust to a suitable treatment plant to prevent the discharge of dan-
gerous gases and vapours to the surrounding atmosphere. If necessary use a catch-
pot to prevent the drainage of condensate back into the pump and run the exhaust
line downwards.
During operation:
Max. ambient temperature : 40 °C
☞ Make sure ventilation is adequate if pump is installed in a housing or if ambient
temperature is elevated.
☞ If pump is installed in altitudes of more than 1000 m above mean sea level check
compatibility with applicable safety requirements, e. g. IEC 60034 (motor may over-
heat due to insufficient cooling).
The motor is shut down by a thermal cutout in the winding.
☞ Attention: Manual reset is necessary. Switch off the pump or isolate the equipment
from mains. Wait approx. five minutes before restarting the pump.
☞ Attention: In case of supply voltage below 100V, the lock of the cutout might be
restricted and the pump might restart on its own after sufficient cooling down. Take
suitable precautions, if an automatic restart of the pump may lead to a critical
dangerous situation.
Due to the high compression ratio of the pumps, pressure at the outlet port might be
generated being higher than the max. permitted pressure compatible with the mechani-
cal stability of the system.
Do not start the pump if the pressure difference between inlet and outlet ports exceeds
max. 1 bar. Attempts to start the pump at higher difference may cause blockade and
damage of the motor.
☞ Check compatibility with max. permitted pressure at outlet and max. pressure dif-
ference between inlet and outlet ports.
Prevent internal condensation, transfer of liquids or dust. The diaphragm and valves
will be damaged, if liquids are pumped in significant amounts.
A warm up period (approx. 15 min.) is required to ensure that the rated ultimate total
pressure and pumping speed are attained.
Shutdown:
Short-term:
Has the pump been exposed to condensate?
☞ Allow the pump to continue to run at atmospheric pressure for a few minutes.
Has the pump been exposed to media which may damage the pump materials or form
deposits
?
☞ Check and clean pump heads if necessary.
Long-term:
➨ Take measures as described in section short-term shutdown.
➨ Separate pump from the apparatus.
➨ Close manual gas ballast valve (see ”accessoires”).
➨ Close inlet and outlet port (e. g. with transport caps).
➨ Store the pump in dry conditions.