6
3.5. Connecting The Vacuum System
The weight of a vacuum chamber freely flanged
onto the vacuum flange must not exceed 200 N
(corresponds to 20 kg). No unilateral loading on
the high vacuum flange.
Maintain maximum cleanliness when fitting all
high vacuum parts. Unclean components
prolong the pumping time.
➡
Only remove the blank cover on the high vacuum flange
when the apparatus is ready for connection so that no
moisture can precipate in the pump; this would prolong the
pumping time needed for attainment of final vacuum.
➡
Insert splinter shield for protection against the ingress of
foreign particles in the high vacuum flange (see
”Accessories” for the turbopump).
3.6. Cooling
The pumping stations are equipped with air cooling as
standard; this can be used up to an ambient temperature of
35 °C. If required, a change to water cooling is possible.
Where operations involve casing heating and/or
gas loads, water cooling is necessary (see
"Accessories).
3.7. Connecting The Casing Heating
In order to accelerate the attainment of final pressure, turbo-
pumps and vacuum chambers can be heated. The heating
duration is dependent on the degree of contamination and the
required final pressure. 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 heating
turbopumps. There is a danger of burns when
coming into contact with hot parts even after the
casing heating is switched off. As far as
possible, thermally insulate the heating sleeve
and pump casing during installation.
When heating, do not touch the pump casing and heating
sleeve.
The relay box of the casing heater can be secured to the
pumping station casing with 4 screws M4 (see also Section
8.1. Dimensions).
For details on casing heating and its installation please refer
to Operating Instructions PM 800 542 BN.
BEWARE
☞
PLEASE NOTE
☞
PLEASE NOTE
3.4. Electrical Connection
The electrical connection should be carried out
in accordance with local regulations.
Alternating current is required to operate the
pumping station.
Change-over the voltage selection switch
The diaphragm pump has a change-over single phase wide
range motor.
➡
Before the installation of the pumping station the local
mains voltage must be ascertained.
➡
Using a suitable screwdriver set the voltage change-over
(on the diaphragm pump terminal box cover) to the range
of mains voltage available ( see the adjacent illustration).
Works setting: X = 230 (voltage range 190 - 260 V)
Voltage change-over switch on the diaphragm pump
A
Setting marking
X
Setting ”230” voltage range 190-260V; 50/60 Hz
Y
Setting ”115” voltage range 90-127V; 50/60 Hz
A
X
Y
Only change the voltage range on the diaphragm
pump when the pumping station is disconnected
from the mains.
Always check the set voltage range before
switching on the pumping station.
➡
Plug in the mains plug (the mains connection cable for the
pumping station is not included in the delivery
consignment, see "Accessories").
➡
The pumping station can now be operated.
Accessory Connections
The electrical connection of the accessories:
See 3.8. Connections Diagram.
