Varian 949-9350, Nstruction Manual, Page: 13 / 79

INSTRUCTION MANUAL
8 87-900-943-01(E)
CAUTION
Check that your electrical mains voltage corresponds to that
indicated on the motor’s plate.
Connect the pump to the power supply.
CAUTION
Pay special attention to the three-phase motor, where an inver-
sion of polarity causes inversion of the direction of rotation of
the pump with consequent possibilities of mechanical damage.
USE
Before being put into service, in order to reach maximum vac-
uum, the pump must be left running for about an hour with the
gas ballast valve open. This will eliminate any humidity from the
oil.
There are no special procedures for switching the pump on; it
needs only to be connected to the electric power by means of
the bipolar switch (version with single-phase motor) or of the
multipolar switch (version with three-phase motor).
,
WARNING!
The pump is designed for operation with neutral or non-
corrosive fluids. It is absolutely forbidden to use potentially ex-
plosive or flammable substances.
There are no special procedures for switching the pump off; it
needs only to be disconnected from the electric power by
means of the bipolar switch (version with single-phase motor)
or of the multipolar switch (version with three-phase motor).
MAINTENANCE
Personnel responsible for pump operation and maintenance
must be well-trained and must be aware of the accident preven-
tion rules.
,
WARNING!
Death may result from contact with high voltages. Always take
extreme care and observe the accident prevention regulations
in force.
,
WARNING!
When machine is powered take care on account of moving
parts and high voltages.
,
WARNING!
If you have to perform maintenance on the pump after a con-
siderable time in operation, leave it to cool as temperature of
the outer surface may be in excess of 60 °C.
,
WARNING!
Always disconnect the power supply to the pump before start-
ing maintenance work. Place a special warning signs over the
power supply breaker switch: MACHINE UNDERGOING
MAINTENANCE - DO NOT POWER ON. When finished, re-
move the safety warning.
,
WARNING!
Do not change the oil immediately after stopping the machine
as the oil temperature may still be high.
CAUTION
When replacing a part, take great care. Pay special attention to
the three-phase motor, where an inversion of polarity causes
inversion of the direction of rotation of the pump with conse-
quent possibilities of mechanical damage.
NOTE
Before returning the pump to the constructor for repairs the
"Health and Safety" sheet attached to this instruction manual
must be filled-in and sent to the local sales office. A copy of the
sheet must be inserted in the pump package before shipping.
If a pump is to be scrapped, it must be disposed of in accor-
dance with the specific national standards.