BUSCH COBRA Instruction Manual
Dry screw vacuum pumps nc 2500 b water-cooled version (wcv)
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Summary of Contents for BUSCH COBRA
- Page 1 COBRA Dry Screw Vacuum Pumps NC 2500 B Water-Cooled Version (WCV) Instruction Manual 0870558967 | A0008_en-US | Original instructions 11/30/2022...
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Page 2: Table Of Contents
Use with Argon............................Conveying Condensable Vapors........................Maintenance................................. Maintenance Schedule ............................Oil Level Inspection............................. Cooling Liquid Level Inspection......................... Oil Change................................Cooling Liquid Change ............................Calibration Procedure of the Electrical Devices ....................2 | 52 Instruction Manual COBRA NC 2500 B WCV_EN_en... - Page 3 8.6.2 Vibration Sensor Calibration........................ Overhaul................................Decommissioning..............................10.1 Dismantling and Disposal ..........................Spare Parts................................Troubleshooting..............................Technical Data ..............................Cooling Liquid............................... Oil ................................... EU Declaration of Conformity..........................UK Declaration of Conformity ..........................Instruction Manual COBRA NC 2500 B WCV_EN_en 3 | 52...
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Page 4: Safety
Safety Prior to handling the machine, this instruction manual should be read and understood. If anything needs to be clarified, please contact your Busch representative. Read this manual carefully before use and keep for future reference. This instruction manual remains valid as long as the customer does not change anything on the product. -
Page 5: Product Description
Silencer (option) Thermometer TSA1 Resistance thermometer (cooling liquid tem- perature) TSA2 Resistance thermometer (exhaust gas tem- Thermostatic valve perature) *For additional cooling liquid drain plugs (CLD), see Cooling Liquid Change [➔ 34]. Instruction Manual COBRA NC 2500 B WCV_EN_en 5 | 52... -
Page 6: Operating Principle
Conveying of other media leads to an increased thermal and/or mechanical load on the machine and is permissible only after a consultation with Busch. The machine is intended for the placement in a non-potentially explosive environment. The machine is capable of maintaining ultimate pressure, see Technical Data. -
Page 7: Start Controls
This unit is composed of a vibration sensor (SA) and a diagnostic electronics VSE100 (delivered loose). The machine must be stopped when the vibration limit value (preset at the factory) is reached, see Wiring Diagram Vibration Diagnostic Unit [➔ 24]. Instruction Manual COBRA NC 2500 B WCV_EN_en 7 | 52... -
Page 8: Mechanical Seals
● Oil lubricated single mechanical seals on the motor side and labyrinth seals on the suction side. ● Oil lubricated single mechanical seals on the motor side and suction side. 8 | 52 Instruction Manual COBRA NC 2500 B WCV_EN_en... -
Page 9: Transport
● Make sure that the eye bolt(s) (EB) is/are in faultless condition, fully screwed in and tightened by hand. Transport with a lifting hook Description The air filter must be removed before l1 = ~430 mm lifting the machine! l2 & l3 = ~650 mm Instruction Manual COBRA NC 2500 B WCV_EN_en 9 | 52... - Page 10 Handling access must be from the un- derneath of the base frame ● Check the machine for transport damage. If the machine is secured to a base plate: ● Remove the machine from the base plate. 10 | 52 Instruction Manual COBRA NC 2500 B WCV_EN_en...
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Page 11: Storage
Use the standard pump oil, see chapter Oil [➔ 46]. ● Before restarting the machine, drain the oil to the normal oil level, see “Oil draining” in chapter Oil Change [➔ 31]. Instruction Manual COBRA NC 2500 B WCV_EN_en 11 | 52... -
Page 12: Installation
● Check the cooling liquid level, see Cooling Liquid Level Inspection [➔ 30]. If the machine is installed at an altitude greater than 1000 meters above sea level: ● Contact your Busch representative, the motor should be derated or the ambient temperature limited. -
Page 13: Suction Connection
– DN150 PN16, EN 1092-1 – ANSI 150, 6” If the machine is used as part of a vacuum system: ● Busch recommends the installation of an isolation valve in order to prevent the machine from turning backwards. 5.2.2 Discharge Connection NOTICE Discharge gas flow obstructed. -
Page 14: Cooling Water Connection
7 ... 8 Particle size µm < 200 Chloride mg/l < 100 Electrical conductivity µS/cm ≤ 100 Free chloride mg/l < 0.3 Materials in contact with the cooling water Stainless steel 14 | 52 Instruction Manual COBRA NC 2500 B WCV_EN_en... -
Page 15: Barrier Gas System Connection
Recommended pressure setting at the pres- bar(a) sure regulating valve (PRV) Filtration µm Recommended flow rate SLM (standard li- ter per minute) Air quality (only for air) Acc. to ISO Class 5.4.4. 8573-1 Instruction Manual COBRA NC 2500 B WCV_EN_en 15 | 52... -
Page 16: Filling Oil
Use of an inappropriate oil. Risk of premature failure! Loss of efficiency! ● Only use an oil type which has previously been approved and recommended by Busch. For oil type and oil capacity see Technical Data and Oil [➔ 46]. 16 | 52... - Page 17 __ / __ / ____ Oil type see nameplate Change interval see instruction manual If there is no sticker (part no. 0565 568 959) on the machine: ● Order it from your Busch representative. Instruction Manual COBRA NC 2500 B WCV_EN_en 17 | 52...
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Page 18: Filling Cooling Liquid
For cooling liquid type and cooling liquid capacity see Technical Data and Cooling Liquid [➔ 45]. Description Cooling liquid vent plug (CLV1) Fill up to the top of the vent orifice (CLV1) Description Resume cooling liquid filling 18 | 52 Instruction Manual COBRA NC 2500 B WCV_EN_en... -
Page 19: Fitting The Coupling
● When the coupling adjustment is done, lock the coupling hub by tightening the radial screw. For further coupling information, go to www.samiflex.se and download the instruction manual of the Samiflex ® coupling. Instruction Manual COBRA NC 2500 B WCV_EN_en 19 | 52... -
Page 20: Electrical Connection
● If the machine is equipped with a power connector, install a residual current protective device to protect persons in case of isolation default. ● Busch recommends installing a type B residual protective device suitable for the electrical in- stallation. -
Page 21: Wiring Diagram Three-Phase Motor (Pump Drive)
● The wiring diagrams given below are typical. Check the inside of the terminal box for motor con- nection instructions/diagrams. Wiring Diagram Three-Phase Motor (Pump Drive) Delta connection (low voltage): Star connection (high voltage): Instruction Manual COBRA NC 2500 B WCV_EN_en 21 | 52... -
Page 22: Electrical Connection Of The Cooling Liquid Pump
● Provide an overload protection according to EN 60204-1 for the pump. ● Electrically connect the cooling liquid pump. ● Make sure that the cooling liquid pump is connected such that is running when the machine is started. 22 | 52 Instruction Manual COBRA NC 2500 B WCV_EN_en... -
Page 23: Wiring Diagram Cooling Liquid Pump
● Make sure that the cooling liquid flows in the right direction according to the following illustra- tion. Description Rotation direction of the motor Cooling liquid flow direction If the rotation of the motor must be changed: ● Switch any two of the motor phase wires. Instruction Manual COBRA NC 2500 B WCV_EN_en 23 | 52... -
Page 24: Electrical Connection Of The Monitoring Devices
Another sensor type. Risk of severe injury! Risk of explosion! ● Only the following sensor type(s) has (have) been approved by Busch and it (they) cannot be re- placed by another one without authorization of the Busch representative. NOTE In order to prevent potential nuisance alarms, Busch recommends that the control system is configured with a time delay of at least 20 seconds. - Page 25 24 V (100 mA) Output 2 24 V (100 mA) 24 V (100 mA) Output 1 analog signal 4-20 mA 4 to 15 mA >15 to 18 mA >18 mA Instruction Manual COBRA NC 2500 B WCV_EN_en 25 | 52...
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Page 26: Commissioning
● Make sure that the maximum permissible number of starts does not exceed 6 starts per hour. Those starts should be spread within the hour. ● Make sure that the operating conditions comply with the Technical Data. 26 | 52 Instruction Manual COBRA NC 2500 B WCV_EN_en... -
Page 27: Recommendations On Operation
● Wait 30 minutes ● Open the inlet valve ● Perform the process ● Close the inlet valve ● Continuously drain condensate from the condensate drain plug (CD) of the silencer (SI) (Optional). Instruction Manual COBRA NC 2500 B WCV_EN_en 27 | 52... -
Page 28: Maintenance
Risk of injuries! Risk of premature failure and loss of efficiency! ● Maintenance work must only be executed by qualified personnel. ● Respect the maintenance intervals or ask your Busch representative for service. NOTICE Using inappropriate cleaners. Risk of removing safety stickers and protective paint! ●... -
Page 29: Maintenance Schedule
● Check the air filter in the Cooling Gas Unit (CGU). Clean or replace the air filter, if necessary. ● Clean the magnetic plugs (MP). Every 16000 hours or after 4 ● Have a major overhaul on the machine (contact Busch). years Instruction Manual COBRA NC 2500 B WCV_EN_en 29 | 52... -
Page 30: Oil Level Inspection
● Make sure that the oil level is between the middle of the oil sight glass and 3mm above it. ● Fill up if necessary, see Oil Filling [➔ 16]. Cooling Liquid Level Inspection ● Shut down the machine. ● Fill up if necessary, see Filling Cooling Liquid [➔ 18]. 30 | 52 Instruction Manual COBRA NC 2500 B WCV_EN_en... -
Page 31: Oil Change
NOTICE Use of an inappropriate oil. Risk of premature failure! Loss of efficiency! ● Only use an oil type which has previously been approved and recommended by Busch. Description Magnetic plug Instruction Manual COBRA NC 2500 B WCV_EN_en 31 | 52... - Page 32 8 | Maintenance Description Magnetic plug For oil type and oil capacity see Technical Data and Oil [➔ 46]. 32 | 52 Instruction Manual COBRA NC 2500 B WCV_EN_en...
- Page 33 __ / __ / ____ Oil type see nameplate Change interval see instruction manual If there is no sticker (part no. 0565 568 959) on the machine: ● Order it from your Busch representative. Instruction Manual COBRA NC 2500 B WCV_EN_en 33 | 52...
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Page 34: Cooling Liquid Change
Cooling Liquid Change NOTICE Cooling liquid draining. Risk of substantial cooling liquid flow! ● Make sure to place sufficiently large drain pans under the machine before removing the cooling liquid drain plugs. 34 | 52 Instruction Manual COBRA NC 2500 B WCV_EN_en... - Page 35 Maintenance | 8 Description Additional cooling liquid draining Bottom view of the machine points (x3) Description Additional cooling liquid draining point Instruction Manual COBRA NC 2500 B WCV_EN_en 35 | 52...
- Page 36 Additional cooling liquid draining point Description Bottom view of the machine Additional cooling liquid draining point For cooling liquid type and cooling liquid capacity see Technical Data and Cooling Liquid [➔ 45]. 36 | 52 Instruction Manual COBRA NC 2500 B WCV_EN_en...
- Page 37 Maintenance | 8 Description Cooling liquid vent plug (CLV1) Fill up to the top of the vent orifice (CLV1) Description Resume cooling liquid filling Instruction Manual COBRA NC 2500 B WCV_EN_en 37 | 52...
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Page 38: Calibration Procedure Of The Electrical Devices
Zone Industrielle CH-2906 Chevenez – Switzerland info@busch.ch ● Reassemble the vibration sensor on the machine (8Nm). ● Perform a test of the control loop by disconnecting output 1 and 2. 38 | 52 Instruction Manual COBRA NC 2500 B WCV_EN_en... -
Page 39: Overhaul
● Decontaminate the machine as much as possible and state the contamination status in a ‘Dec- laration of Contamination’. Busch will only accept machines that come with a completely filled in and legally binding signed ‘Declaration of Contamination’ (form downloadable from www.buschvacuum.com). -
Page 40: Decommissioning
● Make sure that no cooling liquid drips onto the floor. ● Separate special waste from the machine. ● Dispose of special waste in compliance with applicable regulations. ● Dispose of the machine as scrap metal. 40 | 52 Instruction Manual COBRA NC 2500 B WCV_EN_en... -
Page 41: Spare Parts
Risk of premature failure! Loss of efficiency! ● The exclusive use of Busch genuine spare parts and consumables is recommended for the correct functioning of the machine and to validate the warranty. There are no standard spare parts kits available for this product. -
Page 42: Troubleshooting
● Repair the machine. remaining condensate. ● Check the process and fol- low the recommendation in case of Conveying Condens- able Vapors [➔ 27]. The motor is defective. ● Replace the motor. 42 | 52 Instruction Manual COBRA NC 2500 B WCV_EN_en... - Page 43 Oil Change [➔ 31]. The machine runs too hot. ● See problem "The machine runs too hot". For resolution of problems not listed in the troubleshooting table, please contact your Busch repre- sentative. Instruction Manual COBRA NC 2500 B WCV_EN_en 43 | 52...
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Page 44: Technical Data
30 °C Ambient pressure Atmospheric pressure Cooling water requirements See Cooling Water Connection [➔ 14] Oil capacity - motor side Oil capacity - suction side Cooling liquid capacity approx. Weight approx. 2500 44 | 52 Instruction Manual COBRA NC 2500 B WCV_EN_en... -
Page 45: Cooling Liquid
0831 563 469 Part number 20 L packaging 0831 238 761 The cooling liquid Zitrec M-25 is ready-to-use and does not require additional water. For further information, consult the website www.arteco-coolants.com. Instruction Manual COBRA NC 2500 B WCV_EN_en 45 | 52... -
Page 46: Oil
15 | Oil VSC 100 ISO-VG Part number 1 L packaging 0831 168 356 Part number 5 L packaging 0831 168 357 46 | 52 Instruction Manual COBRA NC 2500 B WCV_EN_en... -
Page 47: Eu Declaration Of Conformity
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 Decla- ration of Conformity is issued under the sole responsibility of the manufacturer. -
Page 48: Uk Declaration Of Conformity
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 Dec- laration of Conformity is issued under the sole responsibility of the manufacturer. - Page 49 Notes Instruction Manual COBRA NC 2500 B WCV_EN_en 49 | 52...
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- Page 52 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.