Installation; Vacuum System; Electrical Connection/ Checks - BUSCH COBRA NC 0100 B Supplément Au Manuel D'installation Et De Maintenance

In the table below, you will find the possible alternative of temperature
classes depending of the cooling system and the maximal motor
frequency:
Cooling sys-
Direct cooling
tem
Temperature Max. motor
Type
class frequency
NC 0100 B T4(i/o)
COBRA NC 0200 B
inside (i)
II
outside (o)
or
inside (i)
II
outside (o)
The following temperature classes are available
T4(i/o)
–
or
T3(i)/ T4(o)
–
or
T3(i/o)
–
when the vacuum pump is equipped with a direct cooling system. If
the vacuum pump is equipped with a recirculating cooling system, the
following temperature classes are available
T3(i)/ T4(o)
–
or
T3(i/o)
–
For the adjustment of the temperature class, imperatively refer to
"Adjustment of the thermostatic valve (option) and adjustment of the
temperature class".
In the table below, you will find the possible alternative of temperature
classes depending of the cooling system and the maximal motor
frequency:
Cooling sys-
Direct cooling
tem
Temperature Max. motor
Type
class frequency
T4(i/o)
NC 0200 B T3(i)/T4(o)
T3(i/o)
COBRA NC 0300 B
inside (i)
II
outside (o)
or
inside (i)
II
outside (o)
NC 0100...0300 B, Cat. 1
0870549526 (En/ De/ Fr)
Recirculating cooling
Temperature Max. motor
class frequency
60 Hz T4(i/o) 50 Hz
1G c IIB3 T3, T4
2G c IIB T3, T4
1G c IIB3 T3, T4
2G c IIC T3, T4
Recirculating cooling
Temperature Max. motor
class frequency
50 Hz
T3(i/o) 60 Hz
60 Hz
T3(i)/T4(o) 60 Hz
60 Hz
1G c IIB3 T3, T4
2G c IIB T3, T4
1G c IIB3 T3, T4
2G c IIC T3, T4
The following temperature classes are available
T4(i/o)
–
or
T3(i/o)
–
when the vacuum pump is equipped with a direct cooling system. The
internal and external temperature class must be identical ! If the
vacuum pump is equipped with a recirculating cooling system, only the
temperature class T3(i/o) is available.
For the adjustment of the temperature class, imperatively refer to
"Adjustment of the thermostatic valve (option) and adjustment of the
temperature class".
In the table below, you will find the possible alternative of temperature
classes depending of the cooling system and the maximal motor
frequency:
Cooling
Direct cooling
system
Temperature Max. motor
Type
class frequency
T4(i/o)
NC 0300 B
T3(i/o)

Installation

Vacuum system

The vacuum system must be placed in a horizontal position on a level
surface.
Make sure there is enough space around the pump system (at least 1.5
m) for service work, etc.
The pipes must be cleaned before assembly. Be sure to completely
remove any foreign matters such as welding slag and swarf. Flush or
blow out the pipes before connecting up.
Install the inlet pipe (into the nominal diameter of the pump flange or
the inlet valve port) as short as possible because of resistance in the
pipeline. If longer pipelines (> 5 m) are planned, a wider nominal
diameter is necessary.
Connect the pipes in such a way so that no tensile or compressive
stress is placed on the system, using bellows if necessary.
The inlet and outlet pipes must be laid with gradients so that no
condensation can enter the pump.
Please note the installation instructions for the "Bypass Option" !

Electrical connection/ Checks

Electrical installation may only be carried out by a specialist.
l Make sure that the requirements according to EMC-Directive
2014/30/EU as well as the current EN-standards, electrical and
occupational safety directives and the local or national regulations
respectively, are complied with (this is the responsibility of the
designer of the machinery into which the vacuum pump is to be
incorporated; see also the corresponding comments in the
EC-Declaration of Conformity).
l Make sure that the power supply is compatible with the data on
the nameplate of the drive motor
l Make sure that an overload protection according to EN 60204-1 is
provided for the drive motor
l Make sure that the drive of the vacuum pump will not be affected
by electric or electromagnetic interference; if unsure please seek
advice from your Busch representative
If the direction of rotation of the pump is wrong, serious damage may
occur.
In order to change the direction of rotation, two phases on the motor
must be reversed.
Recirculating cooling
Temperature Max. motor
class frequency
50 Hz
T3(i/o) 50 Hz
50 Hz
Installation
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