Cooling water connection
The cooling water is generally connected with a hose.
The cooling water outlet must be unpressurised.
Connection diameter: 3/8 NPT
Nitrogen connection
The nitrogen is connected with a pipe (leakproof against oxygen).
Connection diameter: 1/4 NPT
Electrical connection/ Checks
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Make sure that the regulations of the Electromagnetic Compatibil-
ity Directive 2014/30/EU as well as standard EN norms, safety di-
rectives and especially local and national regulations are observed
(this is the responsibility of the manufacturer of the system into
which the vacuum pump is integrated according to the Declaration
of Conformity)
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Make sure that the mains power supply corresponds to the data on
the nameplate of the motor
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Make sure that an overload cut-out according to EN 60204-1 is
provided for the motor
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Make sure that the drive of the vacuum pump is not disturbed by
any electric or electromagnetic interferences. If you have any
doubts, contact your Busch representative
Installation
Mounting
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Make sure that the “Necessary installation instructions” are fol-
lowed
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Fasten or install the pump at its final installation site
Electrical connection
WARNING
Risk of electrocution, risk of damage.
Electrical installation must be performed by a suitably qualified
electrician who knows and follows the following regulations:
- IEC 364 or CENELEC HD 384 or DIN VDE 0100,
- IEC Report 664 or DIN VDE 0110,
- VBG 4 or corresponding national regulations on accident preven-
tion
CAUTION
The circuit diagrams described below conform to the standard.
Other circuit diagrams might be used. This depends on the
particular order and the market.
Risk of damage to the motor!
Check the connection of the motor inside the terminal box
according to the circuit diagram.
Motor of screw pump DS 0080-2000 G is connected at factory.
Three phase motor connection:
Star connection (High voltage)
Delta connection (Low voltage)
Connection of supply cable to control box
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Pass the cable through cable fitting of control box and put the first
phase in the box, in front of the still connected cable
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Repeat the procedure for the two other terminals and the ground
terminal too
Power wiring connection
Power wiring 4 poles
1
Phase L1
2
Phase L2
3
Phase L3
4
Ground
Installation and start-up
DS 0080-2000 G
Page 14
0870772712 (En)
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T1
T3
T2
T4
T6
T5
PTC
T6
T4
T5
T1
T2
T3
L3
L2
L1
L3
L2
L1
T6
T4
T5
T1
T2
T3
