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Switch on the heater while the turbopump is in op-
eration. In the event of turbopump overheat, the
heater 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.
! ! ! !
CAUTION
If the chamber of the system is "baked" at a high
temperature, a shield should be installed to prevent
thermal radiation heating the high vacuum flange
on the pump. The maximum temperature allowed
for the inlet flange is 120° C.
WATER COOLING KIT INSTALLATION
Two types of water cooling kits are available to be
mounted when the pump is used under heavy load
conditions or when air cooling is insufficient.
The two model part numbers are: 969-9337 (metal-
lic model), and 969-9347 (plastic model).
Model 969-9337
Model 969-9347
! ! ! !
CAUTION
The items of the plastic model kit must be assem-
bled as shown in the following figure
-4
mbar and
The assembled kit must be screwed into the suit-
able holes of the pump body with a recommended
closing torque of 5 Nm.
Two 6 mm (1/4") internal diameter rubber or plastic
hoses from the water supply must be fitted to the
two nozzles.
These hoses must be held on the respective noz-
zles using hose clips to avoid that the tube(s) gets
loose or disconnected during operation.
Cooling may be carried out either through an open
circuit with eventual discharge of the water, or us-
ing a closed circuit cooling system.
The water temperature must be between +10°C
and +20°C, with an inlet pressure between 3 and 5
bar. This allows a flow of about 200 l/h.
The water electrical conductance must be
µ s/cm. When the conductance is higher, in closed
water circuit, the use of up to 20% of Ethyl-Glycole
is suggested.
29
TECHNICAL INFORMATION
NOTE
NOTE
≤ 500
87-900-892-01(D)
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