14
Installation
Electrical connection
Î
Plug the control lead of the venting valve in accordance with the accessory’s
operating instructions.
Î
Select the venting mode of the venting valve via the DCU, HPU or serial interface
RS485.
Casing heating unit
The turbopump and vacuum chamber can be heated to reach the final pressure
more quickly. Use of a casing heating unit makes sense only for pumps with the
high vacuum flange in stainless steel design. The heating duration depends on the
degree of contamination as well as the final pressure to be reached and should be
at least 4 hours.
Î
Connect the casing heating for the corresponding pump type in accordance with
the accessory's operating manual.
Sealing gas valve
Only pumps with the pump designation
P
(see rating plate) are equipped for con-
nection of sealing gas. The turbopump must be operated with sealing gas to pro-
tect it, such as in the case of corrosive or dusty processes. The connection is made
via a sealing gas valve.
Fig. 6: Connecting the sealing gas valve
Î
Unscrew the screw plug with sealing ring out of the sealing gas connection of
the turbopump.
Î
Screw the sealing gas valve with seal ring into the purge gas connection.
Î
Obtain details on adjusting the sealing gas quantity from the corresponding
operating manual.
CAUTION
Dangerous excess temperatures
Process-related high temperatures can result in impermissible excess temperatures
and thus damage to the turbopump.
Î
Always use water cooling when a casing heating unit is used.
WARNING
Danger of burns
High temperatures arise when the turbopump or vacuum chamber are baked out. As a
result, there is a danger of burns from touching hot parts, even after the housing hea-
ter is switched off!
Î
Thermally insulate heating sleeve, pump housing and vacuum chamber, if possible
during installation.
Î
Do not touch heating sleeve, pump casing and vacuum chamber during bake out.
3
Pump lower part
3a
Sealing gas connection
3b
Locking screw
3c
O-ring
3d
Sealing gas valve
3e
O-ring
G
H
3
3a
3b 3c
3d
3e
