vacuubrand ME 4C VARIO select, Инструкция по эксплуатации

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page 45 of 76
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.
Note : Only manual reset is possible. Acknowledge the er-
ror message at the controller. Switch off the pump and
disconnect from the power source. Identify and eliminate
the cause of failure. Wait approx. five minutes before re -
starting the pump.
Check fan regularly for dust/dirt. Clean if necessary.
Avoid overheating (e.g., due to hot process gases).
A warm up period (approximately 15 min.) is required to en-
sure that the rated ultimate vacuum and pumping speed are
attained. Avoid overheating (e.g., due to hot process gases).
Important notes regarding the use of gas bal-
last
Gas ballast is a continuous purge to keep the pump’s in-
terior as clean as possible and to reduce the possibility of
condensation inside the pump.
➨ Air and pumped media might react inside the pump or
at the outlet of the pump and form hazardous or explo-
sive mixtures, when you use air rather than inert gas
for the gas ballast. By using air as gas ballast, small
amounts of oxygen get inside the vacuum pump. De-
pending on the process, the oxygen in the air can form
an explosive mixture or other dangerous situations can
arise.