COBRA

Dry Screw Vacuum Pumps
BC 1200 A

Instruction Manual

0870732473 | A0003_en-US | Original instructions

11/8/2023

Table of Contents​

Table of Contents
1
2

3

4

5

6

Preface ...................................................................................................................................................................

4

1.1

Congratulations on your purchase ...................................................................................................................

4

Product Description .............................................................................................................................................

5

2.1

COBRA BC 1200 A ................................................................................................................................................

5

2.2

Use ........................................................................................................................................................................

8

2.3

Operating Principle .............................................................................................................................................
2.3.1
COMBI ....................................................................................................................................................
2.3.2
Gas Flow Checks ...................................................................................................................................

9
9
10

2.4

Oil Circuit..............................................................................................................................................................

10

2.5

Cooling..................................................................................................................................................................

10

2.6

Nitrogen System..................................................................................................................................................

10

2.7

Optional Functions/ Use of Available Accessories ..........................................................................................

11

2.8

On/ Off Switch......................................................................................................................................................

11

2.9

Versions ................................................................................................................................................................

11

Safety .....................................................................................................................................................................

12

3.1

Intended Use .......................................................................................................................................................

12

3.2

Safety Information ..............................................................................................................................................

12

3.3

Safety Stickers......................................................................................................................................................

13

3.4

Noise Emission ....................................................................................................................................................

14

3.5

Safety Area ...........................................................................................................................................................

14

3.6

Electrical Safety....................................................................................................................................................
3.6.1
Types of Electrical Work.......................................................................................................................
3.6.2
Lock Out/ Tag Out Procedure (Type 1 of Electrical Work) ...............................................................
3.6.3
Emergency Off Circuit Description .....................................................................................................

14
14
15
15

3.7

Seismic Zone Installation ...................................................................................................................................

15

3.8

Information over the Lubricants .......................................................................................................................
3.8.1
Oil ...........................................................................................................................................................

16
16

3.9

Decommissioning Procedure ............................................................................................................................

17

Transport ...............................................................................................................................................................

18

4.1

Transport in Packed State ..................................................................................................................................

18

4.2

Transport in Unpacked State .............................................................................................................................

18

Storage...................................................................................................................................................................

20

5.1

Temporary Storage .............................................................................................................................................

20

5.2

Removal of the Vacuum Pump ..........................................................................................................................

20

5.3

Preservation.........................................................................................................................................................
5.3.1
Start-up of the Vacuum Pump after Storage ....................................................................................

20
20

Installation and Commissioning ........................................................................................................................

21

6.1

Installation Prerequisites ...................................................................................................................................
6.1.1
Local Installation...................................................................................................................................
6.1.2
Dimensional Drawing ..........................................................................................................................
6.1.3
Inlet Connection ...................................................................................................................................
6.1.4
Discharge Connection..........................................................................................................................
6.1.5
Cooling Water Connection ..................................................................................................................
6.1.6
Nitrogen Connection............................................................................................................................
6.1.7
Electrical Connection/ Checks .............................................................................................................

21
21
23
23
24
25
25
25

6.2

Installation ...........................................................................................................................................................
6.2.1
Mounting ...............................................................................................................................................
6.2.2
Electrical Connection............................................................................................................................

25
25
26

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Instruction Manual COBRA BC 1200 A_EN_enTable of Contents
6.2.3
6.2.4
6.2.5
6.2.6
6.2.7
6.2.8

Equipment Connections (with Options).............................................................................................
Connection of Lines/ Pipes ..................................................................................................................
Oil Filling ................................................................................................................................................
Direct Cooling Checking ......................................................................................................................
Nitrogen Supply Checking...................................................................................................................
Operating Parameters Saving ............................................................................................................

28
28
28
31
31
32

Recommendations on Operation......................................................................................................................
6.3.1
Application.............................................................................................................................................
6.3.2
Switching the Vacuum Pump On/ Off ................................................................................................

32
32
34

Maintenance .........................................................................................................................................................

36

7.1

Maintenance Schedule .......................................................................................................................................
7.1.1
Lock Out/ Tag Out Procedure .............................................................................................................
7.1.2
Safety Lockout Procedure ...................................................................................................................

37
39
39

7.2

Oil Checking .........................................................................................................................................................
7.2.1
Oil Level Checking ................................................................................................................................
7.2.2
Oil Refilling ............................................................................................................................................
7.2.3
Oil Color Inspection..............................................................................................................................
7.2.4
Oil Change .............................................................................................................................................

39
39
40
40
41

7.3

Additional Checking ............................................................................................................................................

44

8

Overhaul ................................................................................................................................................................

45

9

Removal from Service ..........................................................................................................................................

46

9.1

Temporary Removal from Service.....................................................................................................................

46

9.2

Recommissioning................................................................................................................................................

46

9.3

Dismantling and Disposal ..................................................................................................................................

47

10

Spare Parts ............................................................................................................................................................

48

11

Troubleshooting ...................................................................................................................................................

49

12

Oil Type/ Quantity ................................................................................................................................................

51

12.1

Oil Type.................................................................................................................................................................

51

12.2

Oil Quantity ..........................................................................................................................................................

51

13

Technical Data ......................................................................................................................................................

52

14

EU Declaration of Conformity .............................................................................................................................

53

15

UK Declaration of Conformity.............................................................................................................................

54

6.3

7

Instruction Manual COBRA BC 1200 A_EN_en

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1 | Preface​

1

Preface

1.1

Congratulations on your purchase
Congratulations on your purchase of the Busch vacuum pump. With watchful observation of the
field’s requirements, innovation and steady development Busch delivers modern vacuum and pressure solutions worldwide.
These operating instructions contain information for● product description,● safety,● transport,● storage,● installation and commissioning● maintenance,● overhaul and● troubleshootingof the vacuum pump.
For the purpose of these instructions, “handling” the vacuum pump means the transport, storage,
installation, commissioning, influence on operating conditions, maintenance, troubleshooting andoverhaul of the vacuum pump.
Prior to handling the vacuum pump these operating instructions shall be read and understood. Ifanything remains to be clarified, please contact your Busch representative.
Keep these operating instructions and, if applicable, other pertinent operating instructions available
on site.

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Instruction Manual COBRA BC 1200 A_EN_enProduct Description​ | 2

2

Product Description

2.1

COBRA BC 1200 A
LCD
PLC
ESS
OSG 3
IN

LB

EX
MSH
RF

OSG 1
ECO
PRV
CWO
OUT
DGC

CWI

DescriptionIN

Suction connection

OUT

Discharge connection

CWI

Cooling water inlet

CWO

Cooling water outlet

DGC

Nitrogen connections

ESS

Emergency stop button

ECO

Electrical connections

EX

Extracting ventilator

LB

Lifting eye bolt

LCD

HandpadMSH

Main switch

OSG 1

Oil sight glass

OSG 3

Oil sight glass

PLC

Busch PLC

PRV

Regulating valve, Nitrogen

RF

Radial fan

Instruction Manual COBRA BC 1200 A_EN_en

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2 | Product Description​
VSD 2

TS 2

MOT 2
OFP
MOT 1

OFP

ODP OFP

OSG 4

ODP

OSG 1

ODP
VSD 1
OSG 1
CWR

TS 1

CWM
FME

PSA DGR 1 DGR 2 MV OSG 2

Description
CWM

Cooling water flow meter

DGR 1Regulating valve, dilution gas

DGR 2Regulating valve, dilution gas

FME

Nitrogen flowmeter

ODP

Oil drain plug

OFP

Oil filler plug

OSG 1

Oil sight glass

OSG 2

Oil sight glass

OSG 3

Oil sight glass

OSG 4

Oil sight glass

MV

Regulating with solenoid valve, dilution gas

PRVRegulating valve, Nitrogen

TS 1

Pressure sensor

TS 2

Oil temperature sensor for MB

TS 3

Motor klixon for MB

TV

Thermostatic valve

VSD

Variable speed drive for MB

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Instruction Manual COBRA BC 1200 A_EN_enProduct Description​ | 2

Process Gas Diagram
1

23

21

17
12

6
5

20
19

14

24

22

18

16
10

15
3

4

11

2
25

13
7

9

8

Description
1

Process gas inlet

2

Process gas outlet

3

Cooling water flow meter (CWM)

4

Cooling water regulating valve (CWR)

5

Variable speed drive DP (VSD 1)

6

Variable speed drive MB (VSD 2)

7

Nitrogen flow meter, dilution gas (FME)

8

Nitrogen pressure reducer (PRV)

9

Magnetic valve (MV), regulating valve
with soleneoid valve, dilution gas

10Regulating valve, dilution gas (DGR 1)

11

Regulating valve, dilution gas (DGR 2)

12Motor klixon (TS 2)

13

Nitrogen supply

14

Cooling water inlet

15

Cooling water outlet

16

Motor DP (MOT 1)

17

Motor MB (MOT 2)

18

Oil sight glass DP (OSG 1)

19

Oil sight glass DP (OSG 2)

20

Oil sight glass MB (OSG 3)

21

Oil sight glass MB (OSG 4)

22

Pressure sensor (TS 1)

23

Oil temperature sensor MB (klixon) (TS3)

24

Temperature sensor PT100 (TS 4)

25

Pressure sensor (PSA)

Instruction Manual COBRA BC 1200 A_EN_en

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2 | Product Description​

COBRA NW 0090 A
1

5

4

7

6

3

9

2

8

Description
1

Inlet

2

Outlet3

Oil

4

Cooling water

5

Barrier gas

6

Screw rotors

7

Intake medium

8

Cooling water9Motor klixon

PUMA WY 1251 B
3

4

1

6

5

2

Description

2.2

1

Inlet

2

Outlet3

Oil

4

Booster lobe

5

Cooling water

6

Motor klixon

Use
The COBRA BC vacuum pumps are designed for use in the field of microelectronics and similar industries.
They can be used to suck gases and gas mixtures.

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Instruction Manual COBRA BC 1200 A_EN_enProduct Description​ | 2

WARNING
When using toxic, inflammable and/or explosive gases, make sure that the system corresponds in design to applicable local and national safety regulations and that all applicablesafety measures are followed.
All product-specific safety regulations must be observed.
Solid particles must not get into the vacuum pump. Procedural errors can result in the vacuum
pump sucking in a certain quantity of liquid. If the pump has sucked in liquid, a short drying time isnecessary at the end of the procedure.
The allowed maximum inlet gas temperature depends on the inlet pressure and the type of gas: thelower the inlet pressure (Pa), the higher the drawn gas temperature (TGas) can be.
The following indicative values for air can be considered:● Pa > 50 mbar, TGas < 80°C
● Pa < 50 mbar, TGas < 200°C
The vacuum pump is intended for use in a potentially non-explosive environment.
● Make sure that the maximum permissible number of starts does not exceed 6 starts per hour.
Those starts should be spread within the hour.
As far as temperature is concerned, the vacuum pump is suitable for evacuation of a 300 liters tank.
The vacuum pump is not suitable for continuous duty at a pressure more or equal than 150 (hPa)mbar.
Caution, the operating cycle of 150 (hPa) mbar must not exceed more than 5 min. For other applications, contact your Busch representative.
- Maximum inlet pressure: 1 bar (abs).
- With pump running at full speed, do not expose to inlet pressure 300 (hPa) mbar.
The vacuum pump is tight down to ultimate pressure.

2.3

Operating Principle

2.3.1

COMBI
The COBRA BC 1200 A vacuum pumps are a combination of a screw vacuum pump NW 0090 A (DP)and a Booster vacuum pump WY 1251 B (MB). The COMBI vacuum pumps are streamlined.
The COBRA BC vacuum pumps are COBRA NW screw vacuum pumps with cooling water and nitrogen circuits.
The COBRA NW screw vacuum pumps are driven by water-cooled motors.

2.3.1.1

Principle of DP Vacuum Pumps
The COBRA NW screw vacuum pumps work by the principle of spiral pumps. Two parallel screws rotate in opposite directions in the pump body. Entering gases are trapped between the flights of thescrews and the pump body. The gases are conveyed by the rotation of the screws to the exhaust,
where they are discharged.

2.3.1.2

Principle of MB Vacuum Pumps
The Booster vacuum pumps operate according to the approved principle of the Booster type machine. Operation is both simple and effective. Two lobes with identical profiles rotate in opposition
directions within a casing. As they rotate, gas is drawn into the space between each lobe and thecasing where it is trapped and by the rotation pushed out into the discharge. This action is repeated
twice for each revolution of each lobe and therefore four times for each revolution of the drive shaft.
There is no mechanical contact between lobes and cylinder. So no oil lubrication is required.
The drive motor of Booster vacuum pump is a water-cooled canned motor.

Instruction Manual COBRA BC 1200 A_EN_en

9 | 56

2 | Product Description​

1

2

Description
1

2.3.2

Lobes

2

Housing

Gas Flow Checks
A pressure sensor PSA at the discharge monitors the discharge pressure. If the pressure reaches
more than the limit value (alarm, preset at the factory: 0.2 bar), the purge cycle starts.

2.4

Oil Circuit
Since the complete operating principle works without contact, no oil circuit is needed in the work area.

2.5

Cooling
The vacuum pump is cooled by:● a direct cooling water circuit in the motors, cylinder endplates and the DP transmission casing.
The flow regulating valve CWR of cooling water are preset on 4 - 5 l/min at the factory. The watercools in the DP and MB pumps motors, the two variable speed drives (VSD) and the drive/pumptransmission DP system.
● a direct cooling water circuit in the rear bearing (for exceptionally cool running in option).

NOTE
The COBRA BC vacuum pumps are principally dispatched with oil and cooling liquid already inthe vacuum pump but, without cooling water. Before vacuum pump first startup, control theoil level and the cooling liquid level. In the event of absence of one or the other of these lubricants, please carry out the filling (please refer to the various chapters of filling). Do not forget
to connect the cooling water supply before the first startup. Operation without these coolants
can result in damage to the vacuum pump.

2.6

Nitrogen System
The nitrogen system can be used in a number of different ways:● Nitrogen is used as dilution gas. It is injected inside the cylinder on two different places. Nitrogenflow FME injected in the middle hole is preset at 2 l/min and can be adjusted with valve DGR1, depending on the application. Nitrogen flow injected in the hole on cylinder end-plate side is presetat 10 l/min and can be adjusted with valve DGR2, depending on the application. When flow is too
low a warning then an alarm signal is generated by flowmeter FME to the PLC. Status of the pumpdepends on the alarm function set by user (factory setting: None, pump continues running withan alarm). Dilution improves the screws functioning, especially when sucking corrosive gases.

10 | 56

Instruction Manual COBRA BC 1200 A_EN_enProduct Description​ | 2● Nitrogen is used as sealing gas. The nitrogen is injected between the transmission and the process gas to achieve good closeness. The nitrogen flow used for the sealing is set by two chips (ɸ).
With a pressure of 1,5 bar, the flow is around 8 - 10 l/min.
● Nitrogen is used as purge gas. The purge eliminates traces of gases remaining in the vacuum
pump. The vacuum pump purge cycle is programmed in the control and starts, either after a
STOP operation or after an alarm function.
For a correct purge execution, the shut-off valve at the inlet flange must be closed. The purge cycle lasts about 30 min. (Programmable time in the basic parameters).

2.7

Optional Functions/ Use of Available Accessories
A pressure sensor (PSA) mounted at the exhaust, controls the overpressure at the exhaust. If overpressure is above 0,3 bar, pressure sensor gives a warning then an alarm signal. Status of the pumpdepends on the alarm function set by user (factory setting: None, vacuum pump continues runningwith an alarm).
A temperature sensor PT100 (TS4) mounted on the cylinder, measures the temperature inside thecylinder (DP).
A silencer or sound absorber (accessory) at the exhaust reduces the noise of the vacuum pump andcollects any condensate.
A leak-protection non-return valve (optional) at the exhaust traps the condensate in the vacuum
pump when the vacuum pump is switched off.
The LCD controller processes the data of the sensors as follows:● PSA: exhaust pressure● TS4: temperature inside the cylinder DP● MOT1 and MOT2: DP and MB current and speed● FME: nitrogen flow rate, dilution● CWM: cooling water flow rate in motors/ transmission / variable speed drives
See "Installation and Maintenance Instructions, Busch PLC and Busch LCD (No. 0870758077)".

2.8

On/ Off Switch
The vacuum pump is delivered with a circuit breaker. The function start/ stop can be done in Local
by using the LCD controller or in Remote by the production machine.

2.9

Versions
Further vacuum pump descriptions state the nominal displacement and the design level.
Example: BC 1200 A
BC = standard version
1200 = 1200 m3/h
A = Design

Instruction Manual COBRA BC 1200 A_EN_en

11 | 56

3 | Safety​

3

Safety3.1

Intended Use
DEFINITION: To rule out any misunderstanding, the term “handling” of the vacuum pump covers
transport, storage, installation, and operation of the pump as well as effects on operating states andtroubleshooting on the vacuum pump.
The vacuum pump is intended for industrial use. It may only be operated by qualified personnel.
The different application possibilities and limit values for operation described in “Product description” and “Installation requirements” must be observed by the manufacturer of the system into
which the vacuum pump is to be integrated and by users.
The need for personal safety regulations depends in principle on the type of use. The operator must
provide the users with the necessary means and must inform his personnel about the dangers emanating from the processed product.
The operator of the vacuum pump must observe the safety regulations and must train and instruct
his personnel accordingly.
Local regulations regarding the motors and electric control elements must be observed when installing the pump in potentially explosive environments.
The maintenance instructions must be followed and observed.
These installation and maintenance instructions must be read and understood before the vacuum
pump is used. If you have any doubts, contact your Busch representative.

3.2

Safety Information
The vacuum pump is designed and manufactured in compliance with the latest technical standards
and safety regulations. Nevertheless, an element of residual risk remains.
This instruction manual highlights potential hazards where appropriate. Safety notes and warning
messages are tagged with one of the keywords DANGER, WARNING, CAUTION, NOTICE and NOTE as
follows:

DANGER... indicates an imminent dangerous situation that will result in death or serious injuries if notprevented.

WARNING... indicates a potentially dangerous situation that could result in death or serious injuries.

CAUTION... indicates a potentially dangerous situation that could result in minor injuries.

NOTICE... indicates a potentially dangerous situation that could result in damage to property.

12 | 56

Instruction Manual COBRA BC 1200 A_EN_enSafety​ | 3

NOTE... indicates helpful tips and recommendations, as well as information for efficient and trouble-free operation.

CAUTION
The COBRA BC system includes provision for the secondary containment of liquids leaks suchas water and oil.

3.3

Safety Stickers
COBRA NW 0090 A
2

1

Description
1

Warning! Hot surface! Do not touch!

2

Warning! Hot surface! Do not touch!

PUMA WY 1251 B
1

Description
1

Warning! Hot surface! Do not touch!

Instruction Manual COBRA BC 1200 A_EN_en

13 | 56

3 | Safety​

COBRA BC 1200 A

3.4

Noise Emission
Refer to the table “Technical data” for the permissible noise levelling free field conditions according
to EN ISO 2151.

CAUTION
The sound level of the vacuum pump within a certain perimeter of the vacuum pump is high.
Risk of hearing damage.
Users who are spending a longer period in the vicinity of a non-insulated vacuum pump mustwear suitable ear protection.

3.5

Safety Area
Before any maintenance action, ensure a safety perimeter of a least 610 [mm] around the vacuum
pump. Before any maintenance action, ensure a safety perimeter of a least 610 [mm] around thevacuum pump.

3.6

Electrical Safety

3.6.1

Types of Electrical Work
The following are the four types of electrical work defined by the SEMI S2, latest version, guideline:
Type 1Equipment is fully deenergized.
Type 2Equipment is energized. Energized circuits are covered or insulated.
NOTE: Type 2 work includes tasks where the energized circuits are or can be measured by placing
probes through suitable openings in the covers or insulators.

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Instruction Manual COBRA BC 1200 A_EN_enSafety​ | 3
Type 3Equipment is energized. Energized circuits are exposed and inadvertent contact with uninsulated
energized parts is possible. Potential exposures are no greater than 30 volts rms, 42.4 volts peak, 60
volts dc or 240 volt-amp in dry locations.
Type 4Equipment is energized. Energized circuits are exposed and inadvertent contact with uninsulated
energized parts is possible. Potential exposures are greater than 30 volts rms, 42.4 volts peak, 60
volts dc, or 240 volt-amp in dry locations. Potential exposures to radio-frequency currents, whether
induced or via contact, exceed the limits in Table A5-1 of Appendix 5 (SEMI S2 guideline).

3.6.2

Lock Out/ Tag Out Procedure (Type 1 of Electrical Work)● Stop the pump with the LCD controller (press on STOP button during 10s).
● Press on emergency stop button.
● Switch off the main circuit breaker.
● Switch off the customer’s power supply.
● Switch off the water and nitrogen quick connections (inlet first, then outlet).
● Put the label or warning board “Maintenance processing” on or next to the vacuum pump.

3.6.3

Emergency Off Circuit Description● The Emergency off circuit may be opened by pressing on emergency stop button. If this element
occurs, then the DP and MB vacuum pumps will immediately stop. The PLC will remain energized
to save the pump status.
● If the emergency stop button was pressed, check the startup of the pump then release this button to restart the pump. Press on Start button on the LCD controller, the pump will restart.

3.7

Seismic Zone Installation
Upon receipt, the vacuum pump is fixed on the transport pallet with two brackets.
● Convey the vacuum pump to its final location with a pallet truck before removing it from its support.
● Unscrew the fixing screws of the vacuum pump on the transport pallet and remove the machinefrom its support with an appropriate lifting system by using the lifting brackets made for this purpose.

Instruction Manual COBRA BC 1200 A_EN_en

15 | 56

3 | Safety​

1

3

2

4

5

Description
1

Lifting eye bolt

2

Wheel

3

Adjusting nut

4

Wheel

5

Adjusting nut● The vacuum pump must not lay only on the brackets. Unscrew the four adjusting nuts until themachine legs touch the ground.
● Check that the wheels no longer touch the ground.

CAUTION
The vacuum pump is fixed to the ground with four M10 screws, two screws per bracket. The
fixing screw must stand a 1200 N tensible force (per bracket).
The final user must adapt the type of screws depending on the ground material.

3.8

Information over the Lubricants

3.8.1

Oil
Oil filling
Oil quantity (Liter)
Oil type

NW 0090 A

WY 1251 B

0,12

1,4

Busch YLC 250 B, Art. No. 0831 131 400 (0,5 l ≈ 1 kg)● Replacement: After 5000 h (see “Maintenance Schedule [➔ 37]”).

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Instruction Manual COBRA BC 1200 A_EN_enSafety​ | 3

3.9

Decommissioning Procedure
When the product arrives at the end of the lifetime, it is necessary to proceed to the decontamination of the vacuum pump.

CAUTION
Only authorized personnel may carry out any dismantling on the vacuum pump. Before work
begins, the operator of the vacuum pump must fill in a form or a “Declaration Regarding Contamination of Vacuum Equipment and Components” that provides information on possible
dangers and appropriate measures.
If this form has not been filled in completely and signed by a responsible person, the vacuum
pump may not be dismantled.
● Proceed to disassembly of the vacuum pump. Please make sure to wear a personal protective
equipment (PPE) prior to any intervention on the vacuum pump. Some residues may remain inside.
● Proceed to decommissioning of the different parts according to the current local and nationallaws.

Instruction Manual COBRA BC 1200 A_EN_en

17 | 56

4 | Transport​

4

Transport
The COBRA BC vacuum pumps are tested and checked in our factory before careful packing. Check
the packaging for transport damage when the goods arrive. The vacuum pump can withstand temperatures between -25°C and +55°C during transport.

4.1

Transport in Packed State
Packed on a pallet, the vacuum pump can be moved with a hand forklift truck.

4.2

Transport in Unpacked StateThe vacuum pump is fastened to the pallet with fixing pins:● Unscrew the fastening nuts underneath the pallet.

CAUTION
Do not work, walk, or stand under suspended loads.

CAUTION
Please check out the weight of the vacuum pump before lifting it up (see "Technical Data").
Use adequate lifting gear for this.

NOTE
The eyebolts are fitted more or less at equal distance from the center of gravity of the vacuum
pump incl. drive motor. If any accessories that could upset the balance of the vacuum pump,
are installed, or if the vacuum pump is delivered without drive motor, it is necessary to add abelt or rope at a suitable point when lifting the vacuum pump.
● Attach lifting gear securely to the eyebolt or eyebolts.
● Use lifting gear with a crane hook equipped with safety latch.
● Lift the vacuum pump.

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Instruction Manual COBRA BC 1200 A_EN_enTransport​ | 4
In case the vacuum pump was bolted to a pallet with fixing bolts:● Unscrew the fixing bolts in the base frame.

CAUTION
In case of a vacuum pump filled with oil, make sure that by lifting the inclination angle of thevacuum pump do not exceed 5° from the horizontal. In case of too high inclination (>5°), riskof oil leak within the work area.
● Make sure before every transport using the appropriate lifting mean that the inclination of thevacuum pump is less than 5°.
The packaging material must be disposed of in accordance with local and national regulations.
This handbook is contained in the delivery package.

Instruction Manual COBRA BC 1200 A_EN_en

19 | 56

5 | Storage​

5

Storage

5.1

Temporary Storage● Make sure that the intake and exhaust flanges are closed (put on the protective caps included in
the delivery package of the vacuum pump)● Store the vacuum pump:● if possible, the vacuum pump should be stored in its original packaging,● indoors,● dry,● in a dust-free and vibration-free room.

5.2

Removal of the Vacuum Pump
Before starting a vacuum pump that has been stored outside the building for a while, the vacuum
pump must be moved to a room with ambient temperature, where it should rest for a day.

5.3

Preservation
If the vacuum pump will be exposed to unfavorable ambient conditions (for example, aggressive environment, frequent temperature changes), begin immediately with preservation work on the vacuum pump.
In the case of favorable ambient conditions, perform preservation work on the vacuum pump if astorage period of more than three months is planned.
● Make sure that all openings are hermetically sealed; use adhesive tape to fasten loose parts (sealrings, flat seals, etc.).

NOTE
VCI is the abbreviation for “volatile corrosion inhibitor”. The VCI molecule is an organic corrosion inhibitor in the vapor phase. Integrated in various carriers such as film, cardboard, paper,
foam, liquid and powder, it protects the parts against corrosion because of its action in the vapor phase. However, VCI packaging can attack synthetic surfaces and surfaces of other elastomers. If in doubt, please contact your nearest distributor. VCI packaging provides several
years of protection against corrosion, even under the harshest of conditions: overseas shipment, extended storage before use.
● Wrap the vacuum pump in a VCI film.
● Store the vacuum pump:● if possible, the vacuum pump should be stored in its original packaging,● indoors,● dry,● in a dust-free and● vibration-free room.

5.3.1

Start-up of the Vacuum Pump after Storage● Make sure that all protective elements, stoppers, or adhesive tapes attached before preservation
have been removed.
● Switch on the vacuum pump in the sequence described in “Installation and Commissioning[➔ 21]”.

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Instruction Manual COBRA BC 1200 A_EN_enInstallation and Commissioning​ | 6

6Installation and Commissioning

6.1

Installation Prerequisites
CAUTION
In case of non-compliance with the installation prerequisites, particularly in case of insufficient cooling:
Risk of damage or destruction of the vacuum pump and its components!
Risk of personal injury!
The installation prerequisites must be complied with.
● Please ensure that the integration of the vacuum pump is compliant with the safety requirementsof the Machine Directive 2006/42/EC (concerning the responsibility of the system’s manufacturer
into which the vacuum pump is to be incorporated, please also refer to the note in the EU-Declaration of Conformity).

WARNING
Local regulations regarding the motors and electric control elements must be observed when
installing the vacuum pump in potentially explosive environments.
Make sure before start-up that all safety measures have been followed.

6.1.1

Local Installation● Make sure that the environment of the vacuum pump is not potentially explosive.
● Make sure that the following ambient conditions are fulfilled:
Ambient conditions

Requirements

Ambient temperature

0 ... 40 °C (32 ... 104 °F).

Ambient pressure

Atmosphere

Humidity range

20 to 95%

Altitude

Up to 1000 m● Make sure that the cooling water fulfills the following requirements:
HardnessdGH<5°Temperature°C

10 - 25

Overpressurebar (relative)

2-5

Approximate flow rate for the standard version

l/ min7-8

Approximate flow rate for other applications

l/ min

7 -15

Properties

Clean & clear

Particle size

µm

< 200

Chloride

mg/l

< 100

Electrical conductivity

µS/cm

≤ 100

Free chloride

mg/l

< 0.3

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6 | Installation and Commissioning​

NOTE
1° (german degree = 1° dGH) = 1,78° (french degree) = 1,25 e (english degree) = 17,9 mg/kg CaCO3 (american hardness).
● Make sure that the cooling water is neutral and clean.
● Make sure that the cooling water outlet is unpressurised.
● Make sure that the nitrogen fulfills the following requirements:
Overpressure

bar

1,5

Approximate flow ratel/ min10 - 22● Make sure that the ambient conditions correspond to the protection class of the motor (according
to nameplate).
● Make sure that the vacuum pump is placed on or fastened to a horizontal surface.
● Make sure that the vacuum pump is level.
● Make sure that the vacuum pump is at least 1 m away from any wall to ensure good cooling.
● Make sure that the vacuum pump is easily accessible and that the selected installation site fulfills
the requirements for assembly/dismantling.
● Make sure that no temperature-sensitive parts (for example, of plastic, wood, cardboard, paper,electronic parts) come into contact with the hot surfaces of the vacuum pump.
● Make sure that the installation site or assembly area is ventilated in such a way that adequatecooling of the vacuum pump is ensured.

CAUTION
The surface temperature of the vacuum pump can exceed 50°C when the vacuum pump is inoperation.
Danger of burns!
● Make sure that no-one can touch the vacuum pump accidentally. If necessary, attach safeguard.
● Make sure that the oil sight glasses (OSG1,2,3,4) are easily accessible.
If oil changes are to be made on site:● Make sure that the oil drain and oil filler are easily accessible.

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Instruction Manual COBRA BC 1200 A_EN_enInstallation and Commissioning​ | 6

6.1.2

Dimensional Drawing
14

1

12

13

10

8

7

11

3
6

2

4
9
5

Description
1

PLC control panel layout

2Power connector

3

Nitrogen inlet 1/4''

4

Cooling water outlet 3/8''

5

Cooling water inlet 3/8''

6

Pressure regulator

7

Pressure gauge

8

Inlet DN 100 ISO-K

9

Outlet DN 40 ISO-KF

10Interrupter main

11

Emergency stop

12

Remote Control (moveable)

13

Busch PLC

14

Ventilating duct (diameter 50.8)● Make sure that the vacuum pump is at least 1 meter away from any wall to ensure good cooling.
● Before any maintenance action, ensure a safety perimeter of at least 610 [mm] around the vacuum pump.

6.1.3

Inlet Connection● Make sure that the protection that was attached to prevent penetration of particles during transport has been removed before the vacuum pump is connected to the vacuum line

CAUTION
Do not put hands into the inlet aperture!
Risk of body damage!

CAUTION
The intake of liquids or solid particles can lead to the destruction of the vacuum pump.

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6 | Installation and Commissioning​
If the sucked gas contains dusts or solid foreign bodies:● Make sure that a filter or protective grating is installed at the extraction point.
● Make sure that the nominal diameter of the intake line is at least equal to the diameter of the intake flange of the vacuum pump to prevent a drop in the performance of the vacuum pump in
the case of a smaller cross-section● Make sure that the vacuum pump is connected with leakproof lines.

CAUTION
When the intake lines have been connected, make sure that the system does not leak.
Leakages of dangerous substances must be prevented!
● Make sure that the intake lines are equipped with a shut-off device upstream of the intake flange
so that the flow of sucked gas can be stopped.
● Make sure that the intake lines do not exercise any force on the intake flange. Mount bellows if
necessary.
● The inlet flange has the following dimension:– DN 100 ISO-K
In the case of long intake lines, the line cross-section should be larger than the intake flange to prevent a drop in the performance of the vacuum pump. If you have any doubts, contact your Busch
representative.

6.1.4

Discharge Connection● Make sure that the protection that was attached to prevent penetration of particles during transport has been removed before the vacuum pump is connected to the vacuum line

CAUTION
Do not put hands into the outlet aperture!
Risk of body damage!
The following instructions for connection to the discharge only apply if the sucked gas is discharged
by the vacuum pump into a suitable environment.
● Make sure that the nominal diameter of the exhaust line is at least equal to the diameter of theexhaust flange of the vacuum pump to prevent a drop in the performance of the vacuum pump in
the case of a smaller cross-section● Make sure that the vacuum pump is connected with leakproof lines.

CAUTION
When the discharge lines have been connected, make sure that the system does not leak.
Leakages of dangerous substances must be prevented!
● Make sure that the discharge line is mounted in such a way that condensate cannot penetrate into the vacuum pump (siphon trap, gradient).
● Make sure that no shut-off devices are mounted in the discharge line.

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Instruction Manual COBRA BC 1200 A_EN_enInstallation and Commissioning​ | 6● Make sure that the discharge lines do not exercise any force on the discharge flange. Mount bellows if necessary.
● The discharge flange has the following dimension:– DN 40 ISO KF
In the case of long discharge lines, the line cross-section should be larger than the discharge flange
to prevent a drop in the performance of the vacuum pump. If you have any doubts, contact yourBusch representative.

6.1.5

Cooling Water Connection
The cooling water is generally connected with a hose.
The cooling water outlet must be unpressurised.
Connection diameter

6.1.6

3/8 NPT

Nitrogen Connection
The nitrogen is connected with a pipe (leakproof against oxygen).
Connection diameter

6.1.7

1/4 NPT

Electrical Connection/ Checks● Make sure that the regulations of the Electromagnetic Compatibility Directive 2014/30/EU as well
as standard EN norms, safety directives and especially local and national regulations are observed, (this is the responsibility of the manufacturer of the system into which the vacuum pumpis integrated according to the EU-Declaration of Conformity).
● Make sure that the main power supply corresponds to the data on the nameplate of the motor.
● Make sure that an overload cut-out according to EN 60204-1 is provided for the motor.
● 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.

6.2

Installation

6.2.1

Mounting● Make sure that the “Necessary installation instructions” are followed.
● Fasten or install the pump at its final installation site.

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6 | Installation and Commissioning​

6.2.2

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 prevention.

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 motors!
Check the connection of the motors inside the terminal box according to the circuit diagram.
Motor of screw pump DS is connected at factory.

CAUTION
When connecting up the wires into the terminal box: please make sure the tightening torqueof 2 Nm is adhered to and check with a calibrated torque wrench (Nuts M6).

6.2.2.1

Power Wiring Connection
Power wiring 4 poles

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1Phase L1

2

Phase L2

3

Phase L3

4

GroundInstruction Manual COBRA BC 1200 A_EN_enInstallation and Commissioning​ | 6

6.2.2.2

Power Connector on Rear Side
6

1

3

2

8

7

4

9

5

10

Description
1

Pump side2

Phase L1 (Pump side)3

Phase L2 (Pump side)4

Phase L3 (Pump side)

5

Ground (Pump side)

6

Mating connectors

7Phase 1 (Mating connectors)

8

Phase 2 (Mating connectors)

9

Phase 3 (Mating connectors)

10

Ground (Mating connectors)● Protect the vacuum pump with the electrical device according to the rated current of the vacuum
pump.
Pump side
Supplier

Part description

Part number

HARTING

Housing 6B, 1 Lever

0680700058

HARTING

Frame 6B, Marking a…f0680700064

HARTING

Insert 70A, 6~16SQ, Male

0676700050

Mating connectors
Supplier

Part description

Part number

HARTING

Housing 6B, Top Entry, M25, 1 Lever

0680800044

HARTING

Frame 6B, Marking a…f0680700063

HARTING

Insert 70A, 6~16SQ, Female

0676700049

CAUTION
If the vacuum pump is operated with a motor that turns in the wrong direction, it can be destroyed, even if this is the case for only a short moment.
● Make sure that the vacuum pump is connected correctly before switching it on.
● Determine rotation sense of the motor by using a phase rotation tester.
● Press on the start button.
● Make sure that the vacuum pump draws in.
● If not, push the Emergency stop button.

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6 | Installation and Commissioning​
If the direction of rotation must be changed:● Exchange two of the three feeder leads.

6.2.3

Equipment Connections (with Options)
6

1

2

5

4

3

Description
1

LCD serial wiring (RJ12), LCD

2

Micro SD slot

3

PC serial wiring (only for Busch engineers)

4

Customer Network, Communication
modbus RTU RS 232/ RS 485

5

Ethernet network connection (BuschMonitoring System - Option)

6

Interface connection (50 poles) / PID Interface

The information concerning the use of the Busch PLC and the Busch LCD can be found in the Operation and Maintenance manual (Art. No. 0870758077).

6.2.4

Connection of Lines/ Pipes● Connect the intake lines.
● Connect the discharge lines.
● Make sure that all caps, safeguards, and similar covers are mounted.
● Make sure that the inlet and outlet for the cooling air are not covered or closed and that the flowof cooling air is not impaired in any way.

6.2.5

Oil Filling

NOTE
The COBRA BC vacuum pumps are generally dispatched with oil already in the vacuum pump.
Before vacuum pump first startup, control the oil level.
In the event of absence of one or the other of these lubricants, please carry out the filling (see“Oil Type/ Quantity [➔ 51]” for information on the recommended oils).
● Prepare the quantity of oil specified in the table “Oil Quantity [➔ 51]”.
Oil filling
Oil quantity (Liter)
Oil type

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NW 0090 A

WY 1251 B

0,12

1,4

Busch YLC 250 B, Art. No. 0831 131 400 (0,5 l ≈ 1 kg)

Instruction Manual COBRA BC 1200 A_EN_enInstallation and Commissioning​ | 6

6.2.5.1

COBRA NW 0090 A Oil Filling● Unscrew the oil filler plugs (OFP).

3
1

2

Description
1

Oil fill plug (OFP)3

Oil sight glass (OSG)2

Oil drain plug (ODP)● Fill up to the upper level of the target circle of the oil sight glasses (OSG). Make sure that the filling level is in the target circle of the oil sight glasses (OSG).

● Make sure that the seal ring in the oil filler plugs is not damaged, replace plugs if necessary. Fit
the oil filler plugs and tighten up.

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6 | Installation and Commissioning​

6.2.5.2

PUMA WY 1251 B Oil Filling

2

1

4

6

3

5

Description
1

Oil fill plug (OFP)2

Oil fill plug (OFP)3

Oil sight glass (OSG)4

Oil drain plug (ODP)

5

Oil sight glass (OSG)6

Oil drain plug (ODP)NOTE
The quantity of oil specified in the installation handbook is of informative nature only. Checkthe oil level with the help of the various oil sight glasses (OSG1,2,3,4) on the vacuum pump.

CAUTION
Before you change the type of oil, make sure that the new type is compatible with the oldtype. If necessary, flush the vacuum pump.
● Unscrew the oil filler cap (OFP).
● Fill in oil.
● Make sure that the oil level lies between the MIN and MAX markings on the oil sight glasses.
● Make sure that the seals of the oil filler cap are not damaged. Replace them if necessary● Screw on the oil filler cap hermetically tight.

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Instruction Manual COBRA BC 1200 A_EN_enInstallation and Commissioning​ | 6

NOTE
It is easier to switch on the vacuum pump with cold oil when the intake line is not closed orwhen the intake flange is not covered by a rubber plate.
● Start the vacuum pump.
If the intake line is equipped with a shut-off device:● Close the shut-off device.
If the intake line is not equipped with a shut-off device:● Place a rubber plate on the intake flange.
● Let the vacuum pump run for a few minutes.
● Stop the vacuum pump and wait a few minutes.
● Make sure that the oil level still lies between the MIN and MAX markings on the oil sight glasses.
If the oil level is below the MIN marking (Booster):● Fill in more oil.
If the intake line is equipped with a shut-off device:● Open the shut-off device.
If the intake line is not equipped with a shut-off device:● Remove the rubber plate from the intake flange and connect the intake line to the intake
flange.

CAUTION
In case of a vacuum pump filled with oil, make sure that by lifting the inclination angle of thevacuum pump do not exceed 5° from the horizontal.
In case of too high inclination (>5°), risk of oil leak within the work area.
● Make sure before every transport using the appropriate lifting mean that the inclination of thevacuum pump is less than 5°.

CAUTION
The vacuum pump must remain in a horizontal position when it has been filled with oil.

6.2.6

Direct Cooling Checking
The flow of the cooling water is checked by the flow meter CWM. The flowmeter must be connectedin such a way that switching-on leads to a warning at 2 l/min, when the flow drops below 1,5 l/min,the vacuum pump must be stopped.

6.2.7

Nitrogen Supply Checking
The flow of the nitrogen is checked by the flowmeter FME. The flowmeter must be connected in sucha way that switching-on leads to an alarm. The alarm limit can be adjusted depending the type ofprocess.

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6 | Installation and Commissioning​

6.2.8

Operating Parameters Saving
As soon as the vacuum pump is working under normal conditions after being switched on:● Measure the working current of the motor and save it as reference value for all future maintenance and repair work.

6.3

Recommendations on Operation

6.3.1

Application

WARNINGThe vacuum pump is designed for use under the conditions specified here.
If these conditions are not met, there is a risk of damage to or total destruction of the vacuum
pump and its components!
The vacuum pump may only be switched on under the specified conditions.
The COBRA DS vacuum pumps are designed for use in the field of microelectronics and similar industries.
The COBRA BC vacuum pumps are designed for use in the field of microelectronics and similar industries.
They can be used to suck gases and gas mixtures.

WARNING
When using toxic, inflammable and/or explosive gases, make sure that the system corresponds in design to applicable local and national safety regulations and that all applicablesafety measures are followed.
All product-specific safety regulations must be observed.
Solid particles must not get into the vacuum pump. Procedural errors can result in the pump sucking in a certain quantity of liquid. If the pump has sucked in liquid, a short drying time is necessary
at the end of the procedure.
The allowed maximum inlet gas temperature depends on the inlet pressure and the type of gas: thelower the inlet pressure (Pa), the higher the drawn gas temperature (TGas) can be.
The following indicative values for air can be considered:
Pa > 50 mbar

TGas < 80°C

Pa < 50 mbar

TGas < 200°C

The vacuum pump is intended for use in a potentially non-explosive environment.
● Make sure that the maximum permissible number of starts does not exceed 6 starts per hour.
Those starts should be spread within the hour.
As far as temperature is concerned, the vacuum pump is suitable for evacuation of a 300 liters tank.
The vacuum pump is not suitable for continuous duty at a pressure more or equal than 150 (hPa)mbar.
Caution, the operating cycle of 150 (hPa) mbar must not exceed more than 5 min. For other applications, contact your Busch representative.
- Maximum inlet pressure: 1 bar (abs).
- With pump running at full speed, do not expose to inlet pressure 300 (hPa) mbar.

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Instruction Manual COBRA BC 1200 A_EN_enInstallation and Commissioning​ | 6
The vacuum pump is tight down to ultimate pressure.

CAUTION
The surface temperature of the vacuum pump can exceed 50 °C when the vacuum pump is inoperation.
Danger of burns!
The vacuum pump may not be touched when it is in operation. If touching the pump is unavoidable, wait until the surface temperature has cooled down or wear protective gloves.

CAUTION
The sound level of the vacuum pump within a certain perimeter of the vacuum pump is high.
Risk of hearing damage.
Users who are spending a longer period in the vicinity of a non-insulated vacuum pump mustwear suitable ear protection.

CAUTION
The COBRA BC vacuum pumps could be delivered without oil, without cooling water and without cooling liquid.
Operation without oil will result in damage to the vacuum pump!
The vacuum pump must remain in a horizontal position when it has been filled with oil.

CAUTION
The COBRA BC vacuum pumps are always delivered without oil, without cooling water andwithout cooling liquid.
Operation without coolants will result in damage to the vacuum pump!

CAUTION
The cooling water flow, which is checked by the flow meter CWM, must be at least 4 - 5 l/min.
● Make sure that all caps, safeguards, and similar covers are mounted.
● Make sure that the safeguards are switched on.
● Make sure that the inlet and outlet for the cooling air are not cove-red or closed and that the flowof cooling air is not impaired in any way.
● Make sure that the system does not leak. Leakages of dangerous substances must be prevented.
● Make sure that the “Necessary installation instructions” are followed and especially that adequatecooling is ensured.
The following must be noted when the vacuum pump is shut down for a longer period of time:

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6 | Installation and Commissioning​

CAUTION
If there is a risk of frost, all the cooling water must be drained out of the vacuum pump if thepump is shut down for a longer period of time!
● Drain the cooling water● Pull off the connections for the inlet and outlet of the cooling water.
● Drain the cooling water completely.
● If necessary, drain the cooling water with the help of compressed air to prevent any risk offrost or corrosion.

NOTE
When the vacuum pump has not been in operation for a few days or when a sticky substancehas been sucked, it is possible that the two scroll rotors of the NW (DP) vacuum pump will
stick to each other. Screw opens the access cover to the scroll rotors. Loosen the rotors fromeach other with the help of an Allan key by turning them in clockwise direction by hand.

6.3.2

Switching the Vacuum Pump On/ Off6.3.2.1

First Start-up of the System● Make sure that the “Necessary installation instructions” are followed.
If the system is equipped with a solenoid gate valve in the cooling water circuit:● Open the solenoid gate valve.
● Make sure that the cooling water flow is set correctly:● The cooling water circuit (*standard) is used to cool the variators, the motors and the DP andMB cylinders. The flow regulating valve CWR of the cooling water flow is preset at 4 - 5 l/min.
● Make sure that the nitrogen flow is set correctly:● Nitrogen is used as dilution gas. It is injected inside the cylinder on two different places. Nitrogenflow FME injected in the middle hole is preset at 2 l/min and can be adjusted with valve DGR1, depending on the application. Nitrogen flow injected in the hole on cylinder end-plate side is presetat 10 l/min and can be adjusted with valve DGR2.
● Switch on the vacuum pump.
● Make sure that the system does not leak.
If the system is equipped with a solenoid gate valve at the intake:

CAUTION
Do not open gate valve if booster is running at full speed (90 Hz).
Risk of primary pump damage.
● Use "Automatic Load Lock" mode or "External Signal" on tool interface to start/ stop the booster(refer to Busch PLC manual).
● Open the solenoid gate valve.

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Instruction Manual COBRA BC 1200 A_EN_enInstallation and Commissioning​ | 6

6.3.2.2

Switching the System Off
If the system is equipped with a solenoid gate valve at the intake:● Close the solenoid gate valve.
● Switch off the vacuum pump.
● Shut off the nitrogen supply.
● Shut off the cooling water supply.
If the system is equipped with a solenoid gate valve in the cooling water circuit:● Close the solenoid gate valve.
● Make sure that the system is current less.

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7 | Maintenance​

7

Maintenance
DANGER
Live wires.
Risk of electrical shock.
● Electrical installation work must only be executed by qualified personnel.

DANGERIn case the vacuum pump has conveyed gases that have been contaminated with foreign materials that are dangerous to health, the oil and condensates will also be contaminated.
These foreign materials can infiltrate the pores, recesses, and other internal spaces of the vacuum pump.
Danger to health when the vacuum pump is dismantled.
Danger to the environment.
Always wear protective clothing when carrying out maintenance work.
Before any maintenance work, the inlet and outlet piping as well as the vacuum pump itself
must be flushed with nitrogen.

CAUTION
Only authorized personnel may carry out dismantling work on the vacuum pump. Before work
begins, the operator of the vacuum pump must fill in a form or a “Declaration of Contamination of Vacuum Equipment and Components” that provides information on possible dangers
and appropriate measures.
If this form has not been filled in completely and signed, the vacuum pump may not be dismantled.

CAUTION
Before maintenance work is started, a safety area of at least 610 [mm] around the machinemust be set up.

CAUTION
The surface temperature of the vacuum pump can exceed 50 °C when the vacuum pump is inoperation.
Danger of burns!
The vacuum pump may not be touched when it is in operation. If touching the pump is unavoidable, wait until the surface temperature has cooled down or wear protective gloves.
Before starting maintenance work, make sure that the vacuum pump has been switched off and thatit cannot be switched on again accidentally. Follow the shutdown procedure in the section “Lock Out/Tag Out Procedure [➔ 39]”:

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Instruction Manual COBRA BC 1200 A_EN_enMaintenance​ | 7● Stop the pump with the LCD control (press on STOP button during 10s).
● Press on emergency stop button.
● Switch off the main circuit breaker.
● Switch off the customer’s power supply.
● Switch off the water and nitrogen quick connections (inlet first, then outlet).
● Put the label or warning board “Maintenance processing” on or next to the vacuum pump.

CAUTION
The oil temperature can reach a value of 100°C!
The cooling liquid temperature can reach a value of 100°C!
Danger of burns!
● Make sure that the oil circuit and the coolant circuit have been emptied before moving the vacuum pump.
● Make sure that there are no cleaning tools in the pump anymore according to local and national
regulations.
Before pulling off the different connections, make sure that the intake and exhaust lines of the vacuum pump correspond to atmospheric pressure
When the maintenance work has been finished, follow the procedure “Safety Lockout Procedure[➔ 39]”:● Take off the label or warning board “Maintenance Processing”.
● Check the cooling liquid and oil levels according to the chapters “Oil Level Checking [➔ 39]” and“Cooling liquid Level Checking”.
● Switch on the main circuit breaker.
● Release the emergency stop button.
● Switch on the water and nitrogen quick connections (outlet first, then inlet).
● Make sure that the “Necessary Installation Instructions” are followed.
● Start the pump with the LCD control (press on START button).

7.1

Maintenance Schedule
The maintenance intervals depend very much on the individual operating conditions. The intervals
given below are considered as starting values which should be shortened or extended as appropriate. Particularly harsh applications or heavy duty operation, such as high dust loads in the environment or in the process gas, other contamination or ingress of process material, can make it necessary to shorten the maintenance intervals significantly.

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7 | Maintenance​
Interval

Maintenance work

Weekly● Check the oil level, see “Oil Level Checking [➔ 39]”.
● Check the cooling liquid, see “Cooling Liquid Level Checking”.
● Check the cooling water flow, see “Cooling Water” in “Additional Checking [➔ 44]”.
● Check the nitrogen flow, see “Nitrogen in “Additional Checking [➔ 44]”.
● Check the vacuum pump for oil leaks - in case of leaks havethe vacuum pump repaired (contact Busch).
● Check the vacuum pump for cooling liquid leaks - in case ofleaks have the vacuum pump repaired (contact Busch).
● Check the vacuum pump for cooling water leaks - in case ofleaks have the vacuum pump repaired (contact Busch).

Monthly● In the case of operation in a dusty environment:● Make sure that the operating room is clean and free of
dust; clean if necessary.
● Make sure that the vacuum pump has been switched off
and that it cannot be switched on again accidentally.
● Check the electrical connections.
● Carry out a visual inspection of the vacuum pump.

Yearly● Make sure that the vacuum pump has been switched off
and that it cannot be switched on again accidentally.
● Carry out a visual inspection and clean the machine fromdust and dirt
● Check the electrical connections and the monitoring devices.
● Check the seals and replace if necessary.
● Check the intake and discharge lines and clean or replace ifnecessary.

YearlyIf one or more of these accessories are installed.

● If the intake is equipped with a sieve:● Check the sieve at the intake and clean if necessary.
● Check the measuring and safety equipment for working order.
● If the discharge is equipped with a silencer (SI):● Bleed the condensation of the silencer (SI) through thepurge system● If the discharge is equipped with a leak-protection non-return valve:● Clean the leak-protection non-return valve.
● Drain the cooling liquid (see “Cooling Liquid Draining”).
● Check the ventilator filter (RF), clean if necessary.
● If the cooling water line is equipped with a filter:● Check the filter and clean or replace if necessary.

Every 5000 hours or after 1 year

● Change the cooling liquid, see “Cooling Liquid Draining”.
● Clean the magnetic plugs (MP).

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Instruction Manual COBRA BC 1200 A_EN_enMaintenance​ | 7Interval

Maintenance work

Every 16000 hours or after 4
years● Change the oil of the gear and bearing housings (bothsides), see “Oil Change [➔ 41]”.
● Have a major overhaul on the vacuum pump (contact Busch).

7.1.1

Lock Out/ Tag Out Procedure● Stop the pump with the LCD control (press on STOP button during 10s).
● Press on emergency stop button.
● Switch off the main circuit breaker.
● Switch off the customer’s power supply.
● Switch off the water and nitrogen quick connections (inlet first, then outlet).
● Put the label or warning board “Maintenance Processing” on or next to the vacuum pump.

7.1.2

Safety Lockout Procedure● Take off the label or warning board “Maintenance Processing”.
● Check the cooling liquid and oil levels according to the chapters “Oil Level Checking [➔ 39]” and“Cooling Liquid Level Checking”.
● Open the power box cover and check that the FDP1 thermal relay is on manual reset position.
● Close the cover.
● Switch on the main circuit breaker.
● Release the emergency stop button.
● Switch on the water and nitrogen quick connections (outlet first, then inlet).
● Make sure that the “Necessary Installation Instructions” are followed.
● Start the pump with the LCD control (press on START button).

7.2

Oil Checking

7.2.1

Oil Level Checking
Make sure that the vacuum pump has been switched off and that it cannot be switched on again accidentally.
Indication of the oil level on the various oil sight glasses (OSG 1,2,3,4).

Oil level, pump not operating

COBRA NS (DP) vacuum pump:
If the oil level lies below the target circle:● Top up with oil (see “Refilling oil”)
If the oil level exceeds the target circle:● Check the condensate drain● Drain the oil (see “Draining the oil”)

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7 | Maintenance​

Booster (MB):If the oil level lies below the target circle:● Top up with oil (see “Refilling oil”)
If the oil level exceeds the target circle:● Check the condensate drain● Drain the oil (see “Draining the oil”)

7.2.2

Oil Refilling

NOTE
Oil does not normally have to be refilled outside the recommended oil change intervals. A
drop in the oil level indicates a fault (see "Alarms and warnings -> Busch PLC and Busch LCD").

CAUTION
Only fill in oil through the oil filler opening.

CAUTION
Danger of burns when the oil filler cap is open.
Danger of injuries when the oil filler cap is not screwed on properly.
Only unscrew the oil filler cap when the vacuum pump has been switched off.
The vacuum pump may only be switched on when the oil filler cap is properly closed and tight.
We recommend submitting the pump to a leakage rate test in order to ensure the pump isleak tight.
● Make sure that the vacuum pump has been switched off and that it cannot be switched on again
accidentally.
● Unscrew the oil filler caps (OFP) of the DP and MB vacuum pumps (if necessary).
● Fill up to the upper level of the target circle of the oil sight glasses (OSG) or middle of the oil sightglass (Booster).
● Make sure that the oil level still lies in the target circle or between the MIN and MAX markings(Booster) on the oil sight glasses.
● Make sure that the seals of the filler cap are not damaged and that they sit properly. Replacethem if necessary. Screw on the filler cap again.

7.2.3

Oil Color Inspection

WARNING
Oil “YLC 250 B” contaminated chemically or by foreign bodies.
Risk of explosion!
If the oil becomes dark:● Contact your Busch representative without delay.

40 | 56

Instruction Manual COBRA BC 1200 A_EN_enMaintenance​ | 7● Make sure that the oil is either light or transparent.
If the oil becomes dark or looks different from the initial color:● Change the oil immediately, see Oil Change.

You can consult your Busch representative in order to find out why this color change has occurred.

7.2.4

Oil Change

DANGER
If the vacuum pump has pumped gases that were contaminated with foreign bodies that arehazardous to health, the oil is also contaminated with these foreign bodies.
There is a health hazard when changing contaminated oil. There is also a danger to the environment.
Wear protective clothing when replacing contaminated oil.
Contaminated oil must be treated specially and must be disposed of according to applicableregulations.

7.2.4.1

Used Oil Draining

NOTE
After switching off the vacuum pump at normal operating temperature wait no more than 20
minutes before the oil is drained.
● Make sure that the vacuum pump is switched off and cannot accidentally be switched on again.
● Make sure that the vacuum pump is vented to atmospheric pressure.

COBRA NS (DP) vacuum pump:● Put a drain tray underneath the oil drain plugs (ODP).
● Remove the oil drain plugs (ODP).
● Carefully remove the drain plugs.
● Drain the oil.
● Because of wear and tear on the seals replace the current drain plugs with new ones.
When the oil flow has stopped:● Close the oil drain plugs (ODP).
● Switch on the vacuum pump for a few seconds.
● Make sure that the vacuum pump is switched off and cannot accidentally be switched on again.
● Remove the oil drain plugs again and drain any remaining oil.
● Check that no metal swarf sticks to the magnet of the drain plug, clean if necessary.
● Refit the oil drain plugs and tighten up.
● Dispose of the used oil in compliance with applicable regulations.

Instruction Manual COBRA BC 1200 A_EN_en

41 | 56

7 | Maintenance​

CAUTION
Because the ends of the drain plugs are magnetic, metal swarf can stick to them. Always clean
away this swarf when removing the drain plugs.
Because of wear and tear of the seals, it is recommended to replace the drain plugs whenever
the oil is changed.

Booster (MB):● Put a drain tray underneath the oil drain plugs (ODP).
● Unscrew the oil drain plugs (ODP).
● Drain the oil.
When the oil flow has stopped:● Refit the oil drain plugs (ODP) again.
● Switch on the vacuum pump for a brief moment and let it run for a few seconds.
● Make sure that the vacuum pump is switched off and cannot accidentally be switched on again.
● Carefully remove the oil drain plugs again and drain any remaining oil.
● Make sure that the seals of the drain plugs are not damaged and that they sit properly. Replacethem if necessary.
● Refit the oil drain plugs and tighten them up.
● Dispose of the used oil in compliance with applicable regulations.

7.2.4.2

New Oil Filling
COBRA NS (DP) vacuum pump:● Prepare the quantity of oil needed (see “Oil Type/ Quantity [➔ 51]”).

CAUTION
The use of chemically contaminated or polluted oil can lead to hazardous pump conditions
which could cause personal injury.

NOTE
The quantity of oil specified in the Instruction Manual is of informative nature only. Check theoil level with the help of the various oil sight glasses on the vacuum pump.
● Make sure that the drain plugs have been fitted properly and that they do not leak.

CAUTION
Only fill in oil through the oil filler opening.
● Make sure that the vacuum pump has been switched off and that it cannot be switched on again
accidentally.
● Unscrew the oil filler cap (OFP)

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Instruction Manual COBRA BC 1200 A_EN_enMaintenance​ | 7

Oil level, pump not operating● Fill up to the upper level of the target circle of the oil sight glasses (OSG).
● Make sure that the oil level still lies in the target circle of the oil sight glasses.
● Make sure that the seals of the filler cap are not damaged and that they sit properly. Replacethem if necessary.
● Screw on the filler cap again.

Booster (MB):● Prepare the quantity of oil needed (see “Oil Type/ Quantity [➔ 51]”).

CAUTION
The use of chemically contaminated or polluted oil can lead to hazardous pump conditions
which could cause personal injury.

NOTE
The quantity of oil specified in the Instruction Manual is of informative nature only. Check theoil level with the help of the various oil sight glasses on the vacuum pump.
● Make sure that the drain plugs have been fitted properly and that they do not leak.

CAUTION
Only fill in oil through the oil filler opening.
● Make sure that the vacuum pump has been switched off and that it cannot be switched on again
accidentally.
● Unscrew the oil filler cap (OFP)

Oil level, pump not operating● Fill up to the upper level of the target circle of the oil sight glasses (OSG).
● Make sure that the oil level still lies in the target circle of the oil sight glasses.
● Make sure that the seals of the filler cap are not damaged and that they sit properly. Replacethem if necessary.
● Screw on the filler cap again.

Instruction Manual COBRA BC 1200 A_EN_en

43 | 56

7 | Maintenance​● Fill up to the upper level of the target circle of the oil sight glasses (OSG) or middle of the oil sightglass (Booster).
● Make sure that the oil level still lies in the target circle or between the MIN and MAX markings(Booster) on the oil sight glasses.
● Make sure that the seals of the filler cap are not damaged and that they sit properly. Replacethem if necessary. Screw on the filler cap again.

7.3

Additional Checking
Subject

Checking

Cooling Water● Check the cooling water flow.
If the flow drops, check for leaks:● Make sure that the cooling water specifications are followed.

Nitrogen● Check the nitrogen flow.
If the flow drops, check for leaks:● Make sure that the nitrogen specifications are followed.

Current Consumption● Check the current intensity of the motor.
An increased intensity is an indication for a fault (see “Troubleshooting [➔ 49]”).

Silencer (Accessory)● Make sure that the condensate does not collect at the exhaust of the vacuum pump.
● Drain the condensate at the drain opening and collect it in acontainer.
● Dispose of the condensate according to applicable environmental protection regulations.
● Check the silencer regularly and clean it if necessary.

Leak-protection Non-return Valve(Accessory)● Check the leak-protection non-return valve regularly andclean it if necessary.

CAUTION
Wear protective clothing when carrying out maintenance work on the silencer and leak-protection non-return valve.
There could still be residues of contamination.

44 | 56

Instruction Manual COBRA BC 1200 A_EN_enOverhaul​ | 8

8Overhaul
CAUTION
Inappropriate maintenance work on the vacuum pump can damage the vacuum pump.
Danger of explosion!
● If requirements are not met, the vacuum pump may not be switched on!
● Should work exceed the dismantling work described in this handbook, it may only be carried out
by authorized persons.

WARNING
The machine is contaminated with hazardous material.
Risk of poisoning!
Risk of infection!
If the machine is contaminated with hazardous material:● Wear appropriate personal protective equipment.

NOTICE
Improper assembly.
Risk of premature failure!
Loss of efficiency!
● Any dismantling of the machine that goes beyond anything that is described in this manual
should be done by Busch authorized technicians.
In case of the machine having conveyed gas that was contaminated with foreign materials which are
dangerous to health:● Decontaminate the machine as much as possible and state the contamination status in a ‘Declaration of Contamination’.
Busch will only accept machine accompanied by a signed, fully completed and legally binding "declaration of contamination", downloadable from the following link: buschvacuum.com/declaration-ofcontamination.

Instruction Manual COBRA BC 1200 A_EN_en

45 | 56

9 | Removal from Service​

9

Removal from Service
DANGER
Live wires.
Risk of electrical shock.
● Electrical installation work must only be executed by qualified personnel.

CAUTION
Hot surface.
Risk of burns!
● Before doing anything that requires touching the machine, let it cool down first.

9.1

Temporary Removal from Service
Before disconnecting the intake and exhaust lines and switching off the cooling water and nitrogenlines, make sure that the lines have adjusted to atmospheric pressure.

9.2

Recommissioning
CAUTION
After a long period of inactivity, it is possible that the rotor screws of the COBRA NS vacuum
pump are stuck.
Turn the rotor screws manually.
● Make sure that the various protective elements, stoppers, or adhesive tapes have been removed.
● Switch on the vacuum pump by following the procedure described in “Installation and Commissioning”.

46 | 56

Instruction Manual COBRA BC 1200 A_EN_enRemoval from Service​ | 9

9.3

Dismantling and Disposal
DANGERIn case the vacuum pump has conveyed gases that have been contaminated with harmful foreign material which are harmful to health, the oil and the condensates will also be contaminated with harmful foreign material.
These foreign materials can infiltrate the pores, recesses, and other internal spaces of the vacuum pump.
Danger to health during dismantling of the vacuum pump.
Danger to the environment.
During dismantling of the vacuum pump protective equipment and clothing must be worn.
Prior to shipping, the vacuum pump must imperatively be decontaminated, and the degree ofcontamination must be documented in a declaration of decontamination (“Declaration of Decontamination”), which can be downloaded from www.buschvacuum.com.
Used oil and condensates must be disposed of separately in compliance with applicable environmental regulations.
When the product has reached the end of its lifetime:● decontaminate the vacuum pump.

CAUTION
Only authorized personnel may carry out dismantling work on the vacuum pump. Before work
begins, the operator of the vacuum pump must fill in a form or a “Declaration of Decontamination” that provides information on possible dangers and appropriate measures.
If this form has not been filled in completely and signed, the vacuum pump may not be dismantled.
● drain the oil.
● dispose of the oil according to local environmental protection regulations.
● drain the cooling liquid.
● dispose of the cooling liquid according to local environmental protection regulations.
● begin dismantling the vacuum pump.

CAUTION
During dismantling of the vacuum pump protective equipment and clothing must be worn.
● dispose of the vacuum pump as scrap metal.
● dispose of the individual parts of the machine according to local regulations.
A lithium battery is present inside the PLC:
● eliminate the lithium battery according to local and national regulations in place, relating toenvironment.

Instruction Manual COBRA BC 1200 A_EN_en

47 | 56

10 | Spare Parts​

10

Spare Parts
NOTICEUse of non-Busch genuine spare parts.
Risk of premature failure!
Loss of efficiency!
● The exclusive use of Busch genuine spare parts and consumables is recommended for the correctfunctioning of the machine and to validate the warranty.
There are no standard spare parts kits available for this product.
If you require Busch genuine parts:● Contact your Busch representative.

48 | 56

Instruction Manual COBRA BC 1200 A_EN_enTroubleshooting​ | 11

11

Troubleshooting
DANGER
Live wires.
Risk of electrical shock.
● Electrical installation work must only be executed by qualified personnel.

CAUTION
Hot surface.
Risk of burns!
● Before doing anything that requires touching the machine, let it cool down first.
ProblemPossible Cause

RemedyThe machine does not start.

The motor is not supplied withthe correct voltage.

● Check the power supply.

The rotors are jammed or
seized.

● Turn the screw rotors manually from the rotor accessplug (PMR).
● Repair the machine (contact
Busch).

Solid foreign matter has entered the machine.

● Remove the solid foreign
matter or repair the machine (contact Busch).
● Install an inlet filter if necessary.

Instruction Manual COBRA BC 1200 A_EN_en

A temperature sensor has
reached the switch point.

● Let the machine cool down.

Corrosion in the machine fromremaining condensate.

● Repair the machine.

The motor is defective.

● Replace the motor.

● See problem “The machineruns too hot”.
● Check the process and follow the recommendation incase of Conveying Condensable Vapours.

49 | 56

11 | Troubleshooting​ProblemPossible Cause

RemedyThe machine does not reachthe usual pressure on the suction connection.

Suction or discharge lines toolong or section diameter too
small.

● Use larger diameter or
shorter lines.

Process deposits on the pumping components● Flush the machine.

If an inlet screen or an inlet filter is installed, it can be partially clogged.

● Clean the inlet screen or replace the inlet filter cartridge.

The machine runs in the wrong
direction.

● Check the direction of rotation, see Wiring Diagram
Three-Phase Motor (Pump
Drive).

Internal parts are worn or
damaged.

● Repair the machine (contact
Busch).

Insufficient cooling.

● Make sure to comply withthe cooling water requirements, see Cooling Water
Connection.

Ambient temperature too high.

● Observe the permitted ambient temperature, seeTechnical Data.

Temperature of the processgases at the inlet too high.

● Observe the permitted gas
inlet temperature, see Technical Data.

The cooling water pump is defective.

● Repair the machine.

Oil level too low.

● Top up oil.

Oil change intervals are toolong.

● Drain the oil and fill in newoil, see Oil Change.

The machine runs too hot.

● See problem "The machineruns too hot".

The machine runs too hot.

The oil is black.

● Seek advice from your local
Busch representative.

For resolution of problems not listed in the troubleshooting table, please contact your Busch representative.

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Instruction Manual COBRA BC 1200 A_EN_enOil Type/ Quantity​ | 12

12

Oil Type/ Quantity

12.1

Oil Type
Make sure that the oil type corresponds to specifications:

CAUTION
The use of chemically contaminated or polluted oil can lead to hazardous pump conditions
which could cause personal injury.

12.2

Oil Quantity
The quantity of oil specified in the following table is of informative nature only. Check the oil levelwith the help of the various oil sight glasses on the vacuum pump.
Quantity (l)Motor side (A)Inlet side (B)NW 0090 A

0.12-

Quantity (l)Motor side (A)Gear side (B)WY 1251 B

0,6

0,8

Instruction Manual COBRA BC 1200 A_EN_en

51 | 56

13 | Technical Data​

13

Technical Data
BC 1200 A
Nominal pumping speed

m³/h
ACFM

1200
706.2

Ultimate pressure

TORR
hPa (mbar)

0.00225
0.003

Nominal motor ratingbacking pump

kW (50 Hz)

1.5

Nominal motor rating
vacuum booster

kW (90 Hz)

4.0

Power consumption at
ultimate pressure

kW

1.9

Power consumption at
ultimate pressure / idle
mode

kW

1.3

Maximal intensity Δ

A

35

Nominal motor speed
backing pumpmin⁻¹ (50 Hz)

3000

Nominal motor speed
vacuum boostermin⁻¹ (90 Hz)

5400

Noise level (ISO 2151) *

dB(A)

< 62

Ambient temperature
range

°C

0 – 40°F

32 - 104

Maximum allowablecounter pressure at dischargehPa (mbar)

Water consumptionl/minmin. 4.0 – 5.0

Cooling water temperature°C

10 - 25

Cooling water pressure

bar / ΔP

2-5

Nitrogen consumptionl/min

0 – 70

Nitrogen overpressure

bar

1.5

Weight approx.

kg

360

200

* with silencer at exhaust

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Instruction Manual COBRA BC 1200 A_EN_enEU Declaration of Conformity​ | 14

14

EU Declaration of Conformity

This Declaration of Conformity and the CE-markings affixed to the nameplate are valid for the machine within the Busch scope of delivery. This Declaration of Conformity is issued under the sole responsibility of the manufacturer.
When this machine is integrated into a superordinate machinery the manufacturer of the superordinate machinery (this can be the operating company, too) must conduct the conformity assessment process for the superordinate machine or plant, issue the Declaration of Conformity for it and affix
the CE-marking.
The manufacturer

Busch Manufacturing Korea, Ltd.
189-51, Soicheon-ro, Majang-myun
Icheon-si, Gyunggi-do, 467-813
Republic of Korea

declares that the machine: COBRA BC 1200 A
fulfill(s) all the relevant provisions from EU directives:–‘Machinery’ 2006/42/EC–‘Electromagnetic Compatibility’ (EMC) 2014/30/EU–‘RoHS’ 2011/65/EU Restriction of the use of certain hazardous substances in electrical and electronic equipment (incl. all related applicable amendments)

and comply(-ies) with the following harmonized standards that have been used to fulfill those provisions:Standards

Title of the Standard

EN ISO 12100 : 2010

Safety of machinery - Basic concepts, general principles of design

EN ISO 13857 : 2019

Safety of machinery - Safety distances to prevent hazard zones being reached by the upper and lower
limbs

EN ISO 2151 : 2008

Acoustics - Noise test code for compressors and vacuum pumps - Engineering method (grade 2)

EN 60204-1 : 2018

Safety of machinery - Electrical equipment of machines - Part 1: General requirements

EN IEC 61000-6-2 : 2019

Electromagnetic compatibility (EMC) - Generic standards. Immunity for industrial environments

EN IEC 61000-6-4 : 2019

Electromagnetic compatibility (EMC) - Generic standards. Emission standard for industrial environments

Legal person authorized to compile the technical file and authorized representative in the EU (ifthe manufacturer is not located in the EU):

Busch Dienste GmbH
Schauinslandstr. 1
DE-79689 Maulburg

Icheon-si, 29.06.2023

Seung-hwa Yoo
General Manager
Busch Manufacturing Korea, Ltd

Instruction Manual COBRA BC 1200 A_EN_en

53 | 56

15 | UK Declaration of Conformity​

15

UK Declaration of Conformity

This Declaration of Conformity and the UKCA-markings affixed to the nameplate are valid for the machine within the Busch scope of delivery. This Declaration of Conformity is issued under the sole responsibility of the manufacturer.
When this machine is integrated into a superordinate machinery the manufacturer of the superordinate machinery (this can be the operating company, too) must conduct the conformity assessment process for the superordinate machine or plant, issue the Declaration of Conformity for it and affix
the UKCA-marking.
The manufacturer

Busch Manufacturing Korea, Ltd.
189-51, Soicheon-ro, Majang-myun
Icheon-si, Gyunggi-do, 467-813
Republic of Korea

declares that the machine: COBRA BC 1200 A
fulfill(s) all the relevant provisions from UK legislations:–

Supply of Machinery (Safety) Regulations 2008–

Electromagnetic Compatibility Regulations 2016–

Restriction of the use of certain hazardous substances in Electrical and Electronic Equipment Regulations 2012

and comply(-ies) with the following designated standards that have been used to fulfill those provisions:Standards

Title of the Standard

EN ISO 12100 : 2010

Safety of machinery - Basic concepts, general principles of design

EN ISO 13857 : 2019

Safety of machinery - Safety distances to prevent hazard zones being reached by the upper and lower
limbs

EN ISO 2151 : 2008

Acoustics - Noise test code for compressors and vacuum pumps - Engineering method (grade 2)

EN 60204-1 : 2018

Safety of machinery - Electrical equipment of machines - Part 1: General requirements

EN IEC 61000-6-2 : 2019

Electromagnetic compatibility (EMC) - Generic standards. Immunity for industrial environments

EN IEC 61000-6-4 : 2019

Electromagnetic compatibility (EMC) - Generic standards. Emission standard for industrial environments

Legal person authorized to compile the technical file and importer in the UK (if the manufacturer Busch (UK) Ltd
is not located in the UK):
30 Hortonwood
Telford – UK
Icheon-si, 29.06.2023

Seung-hwa Yoo
General Manager
Busch Manufacturing Korea, Ltd

54 | 56

Instruction Manual COBRA BC 1200 A_EN_en​Notes

Notes

Instruction Manual COBRA BC 1200 A_EN_en

55 | 56

Busch
Vacuum Solutions
With a network of over 60 companies in more than 40 countries and agencies worldwide,
Busch has a global presence. In every country, highly competent local personnel delivers
custom-tailored support backed by a global network of expertise. Wherever you are.
Whatever your business. We are there for you.

●Busch companies and Busch employees●

Local representatives and distributors●

Busch production site

0870732473 | A0003_en-US

www.buschvacuum.com