10
3.4. Connecting The Cooling Unit
The Turbopumps TMH 521 P/TMU 521 P must be water or air
cooled.
Air cooling may only be used where the ambient temperature
is < 35 °C.
Use and installation:
– For water cooling please refer to Operating Instructions
PM 0152 BN.
– For air cooling please refer to Operating Instructions
PM 0543 BN.
3.5. Connecting The Venting Valve
The venting valve TVF 005 (see Section 11. Accessories)
provides automatic venting in the event of a power failure and
switching off.
Fitting the venting valve
➡
Unscrew the venting screw from the venting connection 4
(please refer to Section 2.1.) of the turbopump.
➡
Screw in venting valve 42 with seal (USIT ring) on hexago-
nal SW 14.
Electrical connection
➡
Plug control lead 42a into the connection ”VENT” of the
TC 600 (8) on the turbopump.
The venting mode of the venting valve is selected via the DCU
or Serial Interface RS 485.
The maximum pressure at the venting valve is
1.5 bar absolute.
Please refer to Operating Instructions PM 0507 BN for details
on Venting Valve TVF 005.
CAUTION
3.6. Connecting The Casing Heating Unit
The attainment of final pressures is accelerated when
turbopumps and vacuum chambers are baked out.
The heating duration is dependent on the degree of dirt and
on the required final pressure level. The heating duration
should be at least 4 hours.
Where casing heating is involved the turbopump
must be water cooled.
High temperatures are generated when
turbopumps and vacuum chambers are baked
out. There is a danger of burns resulting from
touching hot parts, even after the casing heating
has been switched off.
Ideally, the heating sleeve, pump casing and
vacuum chamber should be insulated during
installation. Do not touch the heating sleeve,
pump casing and vacuum chamber during the
baking out process.
Please refer to Operating Instructions PM 0542 BN for details
on the casing heating unit and its installation.
3.7. Connecting The Sealing Gas Valve
To protect the pump, particularly where corrosive or dust
producing processes are involved, it is necessary to use
sealing gas.
Connection is made via the sealing gas valve (please see
Section. 11. Accessories).
WARNING
☞
PLEASE NOTE
Please refer to Operating Instructions PM 0229 BN for details
on installing the sealing gas valve and adjusting the sealing
gas flow.
8
8d
VENT
42a
42b
42
Connecting the Venting Valve TVF 005
8
Electronic Drive Unit TC 600
8d Remote plug
42
Venting Valve TVF 005
42a Control lead venting valve/TC 600
42b Plug
66 66a
9
15
Connecting the sealing gas valve
9
Locking screw sealing gas connection
15
Seal
66
Sealing gas valve
66a Seal
