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• Avoid overpressure of more than 17.5 psi absolute (1.2
bar absolute) in the event that inert gas is connected to
the pump, to the gas ballast or to a venting valve.
•
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.
• Connect tubing gas tight at the vacuum connec-
tion of the second CVC 3000 controller (PC 520 NT /
PC 620 NT).
• 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.
• 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.
Do not place the pumping unit on soft surfaces (e.g., rub-
ber foam) during operation. This may reduce or block the
fans’ air supply. Do not cover the pumping unit.
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
NOTICE
