vacuubrand MD 4C NT, Instructions For Use Manual

Page: 15 / 80

page 15 of 80
•
Note
: Flexible elements will shrink when evacuated.
• Connect hoses gas tight at inlet and outlet of the pump
and secure against loosening, for example, with a hose
clamp.
• Ensure that no foreign objects can be drawn into the
pump.
• 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, 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 be-
fore setting the voltage selection switch. Note : If the
pump is switched on with wrong voltage selection, the
motor may be damaged!
• 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. Check fan regularly for dust/dirt.
Clean fan guard grill if necessary to avoid a reduction of
ventilation.
The mains plug is a disconnecting device to separate the
pump from the supply voltage. Ensure that the mains plug
is easily accessible at all times to allow the separation of
the device from the power supply.
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).
NOTICE