Installation
25300324726_002_C0 - 10/2016 - © Leybold
3.2 Operating environment
The maximum permissible ambient temperature is 45 °C (113 °F). Do not
expose the pump or the frequency converter with type of protection IP 30 to
dripping or spraying water.
If the pump is used within a magnetic field, the magnetic induction at the
surface of the pump housing may not exceed:
B = 5 mT if impinging radially and
B = 15 mT if impinging axially.
Exceeding this limit can cause excessive rotor hea ting due to the eddy cur-
rents generated in this situation. It is therefore necessary to provide suitable
shielding in such cases.
Places of installation up to 1000 m above sea level (3300 ft) are possible
without restrictions. At altitudes over 1000 m heat dissipation by the ambient
air is impaired. Please consult us.
The frequency converter must not be operated in explosive gas
atmo spheres.
3.3 Attach the pump to the vacuum chamber
Never touch the rotor. Touching the rotor may cause injury and damage the
rotor bearing.
The high-vacuum flange must be solidly mounted to the vacuum chamber.
Observe Safety Information 0.1.6.
The shipping flange and bolts may be used only for shipping purposes;
they are not suitable for mounting the pumps in systems.
Remove the transport seal from the intake flange and remove the desiccant.
Pay attention to maximum cleanliness when connecting.
In the case of a sudden rotor vane rupture or rotor-stator contact which may
occur in practice (caused, for example, by solid objects from the process
chamber entering the pump through the high vacuum flange), a crash
momentum amounting to 5 kNm maximum needs to be absorbed by the
system.
When not complying with the installation and operating conditions or the
maintenance intervals described in the Operating Instructions, the rotor may
suffer complete destruction by material fatigue, for example. In this case
which is highly unlikely to occur in practice, a deceleration or burst momen-
tum of 35 kNm maximum needs to be absorbed by the system, should the
pump suddenly seize.
We have successfully tested the pumps in agreement with ISO 27892 both
against crashes and also bursts.
Ambient temperature
Magnetic field
Places of installation
NOTICE
WARNING
Torques when the
rotor seizes
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