vacuubrand MD 4C NT + 2 AK, Instructions For Use Manual

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page 43 of 75
etc.), let the pump run with gas ballast to help purge any
condensation in the pump.
Prevent internal condensation, transfer of liquids or dust.
The diaphragms and valves will be damaged, if liquids are
Check the pump regularly for external soiling and depos-
its. Clean the pump if necessary to avoid an increase of
the pump’s operating temperature.
Operation with silencer (optional) at the outlet: Operating
the pump at a high inlet pressure or pumping dusty gases
for a long time may cause clogging of the silencer. Check
the silencer regularly and replace if necessary.
In case of overload, the motor is shut down by a self-hold
thermal circuit breaker in the winding. thermal circuit breaker
Note
: Only a manual reset is possible. Switch off the
pump and disconnect the electrical power cord. Identify
minutes before restarting the pump.
Note : In case of supply voltage below 100V , the lock
of the breaker may not latch and the pump might re-
-
ate precautions, if an automatic restart of the pump
may lead to a dangerous situation.
A warm up period (approximately 15 min.) is required to
ensure that the rated ultimate vacuum and pumping speed
are attained. Avoid overheating (e.g., due to hot process
gases).
-
phragm to pump down.
-
clockwise. Do not attempt to open the valve further
NOTICE