VACUUBRAND MD 1C VARIO-SP - Manual (Page 15)

page 15 of 87
• Check the power source and the pump’s rating plate
to be sure that the power source and the equipment
match in voltage, phase, and frequency.
• On pumps with a dual-voltage motor (100-120V / 200-
230V; 50/60 Hz), check that the voltage selection
switch is set correctly. Do not change the setting of the
voltage selection switch while the pump is connected
to AC power. Unplug the pump before setting the volt-
age selection switch. Note: If the pump is switched on
with wrong voltage selection, the motor may be dam-
aged!
• Ensure that no liquids can flow on or into the pump mo-
tor when assembling or disassembling vacuum lines at
the pump. Risk of corrosion and/or short circuit!
• Ensure that the coolant outlet pipe is always free and
that it cannot get blocked. If installing an optional cool-
ant valve, it must always be in the supply line of the
exhaust waste vapor condenser.
Make sure ventilation is adequate to maintain recommend-
ed operating temperature. Keep a minimum distance of
2 in (5 cm) between the cooling fan and surrounding items
(e.g., housing, walls, etc.), or else install an external auto-
matic ventilation system. Clean fan guard grill if necessary
to avoid a reduction of ventilation.
Use only hoses at the inlet and outlet of the pump with
an inner diameter at least as large as the diameter of the
pump’s tubing (to avoid overpressure at the outlet, and
reduction of pumping speed at the inlet).
Allow the equipment to equilibrate to ambient temperature
if you bring it from cold environment into a room prior to
operation. Notice if there is water condensation on cold
surfaces.
NOTICE