Heater Band Installation; Air Cooling Kit Installation - Varian Turbo-V 81-T Bedienungshandbuch

HEATER BAND INSTALLATION

The heater band model 969-9801 and 969-9802
can be used to heat the pump casing when a
bakeout is needed.
The heater band is applied to the upper part of the
pump casing, as shown in the figure, and heats it
to a temperature of about 80° C.
The heater band must be mounted such that there
is perfect thermal contact with the pump wall to ob-
tain fast and efficient heating.
Switch on the heater while the turbopump is in op-
eration. In the event of turbopump overheat, the
pump will be automatically cut out by the thermis-
tor sensor.
NOTE
The turbopump must be "baked" only when operat-
ing with an inlet pressure less than 10
with water cooling.
If the chamber of the system is "baked" at a high
temperature, a shield should be installed to pre-
vent thermal radiation heating the high vacuum
flange on the pump. The maximum temperature
allowed for the inlet flange is 120° C.

AIR COOLING KIT INSTALLATION

An air cooling kit (mod. 969-9290) is available for
cooling the pump during heavy operational condi-
tions and whenever the natural air convection is
not sufficient.
Fan specifications:
− air flow: 12.8 l/s (27.1 CFM)
− input voltage: 24 Vdc
− dimensions: 60 x 60 x 25 mm
− power: 2.60 W
The fan bracket is shaped so that it can be
mounted close to the pump and in different posi-
tions.
To fix the fan to the Turbo-V 81-T case execute
the following procedure (see the following figure):
1. Fix the fan to the suitable bracket by means of
2. Fix the bracket to the pump body;
3. Connect the fan supply to the P4 connector of
-4
mbar and
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TECHNICAL INFORMATION
!
CAUTION
the furnished screws;
the controller.
87-900-984-01(D)