VACUUBRAND MD 1C VARIO-SP - Manual (Page 20)

page 20 of 87
• Pay attention to the safety symbol ”hot surfaces” on
the equipment. Hot parts may cause burns if touched.
Adopt suitable measures to prevent any danger aris-
ing from hot surfaces or electric sparks. Ensure that
hot surfaces of the pump do not cause burns. Provide
a suitable contact guard if necessary.
• Ensure that the coolant outlet pipe at the waste vapor
condenser is always free and that it cannot get blocked.
Do not start the pump if the pressure difference between
inlet and outlet exceeds 16 psi (1.1 bar) at maximum.
Prevent the backpressure of gases and the backflow of
condensates at the outlet.
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 mea-
sures must also allow for the requirements of the respec-
tive application.
Pumps with AC motor:
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 elimi-
nate 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 dangerous situation (e.g., switch
off the pump and disconnect from the power source).
Pumps with DC motor:
A temperature sensor at the circuit board protects the mo-
tor: Current limitation in case the temperature at the circuit
NOTICE