10
3.4. Connecting The Cooling Unit
The Turbopumps TPH 1201 P / P C have been designed to be
water cooled as standard. (cooling water connections please
refer to Section 9.1. Dimensions Diagram)
When the turbopump is water cooled the enclo-
sed cover plate for the TC 750 must be installed
by an electrical specialist, in order to attain
protection class IP 54 (please see Section 3.8.).
Water Cooling
The cooling water can be drawn either
– from the cooling water mains, or
– from Recycled Water Cooling Unit TZK (please see Section
11. Accessories) in closed circuit.
Cooling from the cooling water mains
To prevent deposits collecting in the pump the cooling water
must be filtered.
Minimum cooling water requirements:
Mechanically clean, optically clear, no turbidity, no sediment,
chemically neutral, temperature > dew point.
CAUTION
Oxygen content:
max.
4 mg/kg
Chloride content:
max.
100 mg/kg
Carbonate hardness:
max.
10 ° dH
Consumption of potassium
permanganate:
max.
10 mg/kg
Carbon dioxide:
Undetectable
Ammonia:
Undetectable
pH-value:
7 – 9
Max. fore-line over pressure:
max.
6 bar
Connection to the cooling water mains
➡
Fit the dirt trap (see Section 11. Accessories) in the supply
line.
➡
Connect the supply line with hose clips onto one of the two
cooling water connections.
➡
Connect the return line to the other cooling water connec-
tion of the turbopump.
➡
Tighten cooling water connection to a torque of 10 Nm.
➡
Tighten all hose clips and check for firm seating of the
hoses.
Cooling with the Recycled Water Cooling Unit TZK
(Accessory)
Connection
Dirt traps are not permissible in the lines.
All other steps as for connecting to the cooling water mains.
3
33
31
32
TC 750
Cooling from the cooling water mains
3
Cooling water connection
31 Supply line
32 Return line
33 Dirt trap
3
31
32
35
TZK
TC 750
Cooling with Recycled Water Cooling Unit TZK
3
Cooling water connection
31 Supply line
32 Return line
35 Recycled Water Cooling Unit TZK
3.5. Connecting The Casing Heating Unit
In order to accelerate attainment of final pressures,
turbopumps and vacuum chambers can be heated.
Heating duration is dependent on the level of contamination
and the required final pressure but should be at least four
hours.
Baking out is only practical on pumps with
stainless steel casings (TPU pumps).
On account of their aluminium casings, the
temperatures attainable on TPH pumps are not
high enough.
High temperatures are generated when
turbopumps are heated.
There is a danger of injury from coming into
contact with hot parts even after the casing
heating has been switched off.
Heating sleeve and the pump casing should be
thermally insulated during the installation.
During the heating phase be careful not to come
into contact with the heating sleeve or the pump
casing.
For details regarding the casing heating and its installation
please refer to Operating Instructions PM 0542 BN and the
connection diagram see Section 3.13..
WARNING
☞
PLEASE NOTE
