BUSCH COBRA Instruction Manual
Dry screw vacuum pumps
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Summary of Contents for BUSCH COBRA
- Page 1 Instruction Manual COBRA Dry Screw Vacuum Pumps NC 0100 B, NC 0200 B, NC 0300 B (water-cooled version) 0870573306/-0004_en / Original instructions / Modifications reserved 14/09/2021...
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Page 2: Table Of Contents
6 Commissioning ........................25 6.1 Conveying Condensable Vapours................... 26 6.2 Liquid Flushing Procedure ....................27 6.3 Gas Purging Procedure....................27 7 Maintenance ...........................28 7.1 Maintenance Schedule....................29 7.2 Oil Level Inspection ......................29 2 / 44 Instruction Manual COBRA NC 0100-0300 B WCV_EN_en... - Page 3 7.5 Cooling Liquid Change....................34 8 Overhaul..........................35 9 Decommissioning ........................35 9.1 Dismantling and Disposal....................35 10 Spare Parts ..........................36 11 Troubleshooting........................37 12 Technical Data........................39 13 Cooling Liquid ........................39 14 Oil ............................39 15 EU Declaration of Conformity ....................40 Instruction Manual COBRA NC 0100-0300 B WCV_EN_en...
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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 any- thing on the product. -
Page 5: Product Description
Motor terminal box Nameplate Oil drain plug Oil fill plug Oil sight glass Discharge connection Plate heat exchanger Plug for manual rotation of rotors Silencer Safety valve Thermometer Temperature switch Thermostatic valve Instruction Manual COBRA NC 0100-0300 B WCV_EN_en 5 / 44... -
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 [► 39]. -
Page 7: Start Controls
The machine must be stopped when the temperature switch trips (106 °C). 2.5.2 Thermometer The thermometer allows a visual display of the cooling water temperature in the cool- ing water chamber. Instruction Manual COBRA NC 0100-0300 B WCV_EN_en 7 / 44... -
Page 8: Sealing Systems
– The dilution gas ballast prevents the formation of condensates or dilutes them, de- pending on the application. The nitrogen is fed into the cylinder. 8 / 44 Instruction Manual COBRA NC 0100-0300 B WCV_EN_en... -
Page 9: Pressure Switch (Barrier Gas)
• Make sure that the eyebolt(s) (EB) is/are in faultless condition, fully screwed in and tightened by hand. Machine weight: see the technical data or the nameplate (NP) • Check the machine for transport damage. If the machine is secured to a base plate: Instruction Manual COBRA NC 0100-0300 B WCV_EN_en 9 / 44... - Page 10 3 | Transport • Remove the machine from the base plate. 10 / 44 Instruction Manual COBRA NC 0100-0300 B WCV_EN_en...
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Page 11: Storage
• Make sure that the cooling water complies with the requirements, see Cooling Wa- ter Connection [► 14]. If the machine is installed at an altitude greater than 1000 meters above sea level: Instruction Manual COBRA NC 0100-0300 B WCV_EN_en 11 / 44... - Page 12 5 | Installation • Contact your Busch representative, the motor should be derated or the ambient temperature limited. 12 / 44 Instruction Manual COBRA NC 0100-0300 B WCV_EN_en...
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Page 13: Connecting Lines / Pipes
– DN50 PN16, EN 1092-1 for NC 0200 B and NC 0300 B 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. -
Page 14: Cooling Water Connection
2 ... 4 Water pressure 3 ... 6 (direct cooling) 1 ... 6 (plate heat exchanger) Supply temperature °C +10 ... +25 Required pressure differential across sup- ≥ 3 (direct cooling) ply and return > 0.5 (plate heat exchanger) 14 / 44 Instruction Manual COBRA NC 0100-0300 B WCV_EN_en... -
Page 15: Barrier Gas System Connection (Optional)
• Electrically connect the flow switch (FS) of the flow meter, see Wiring Diagram Flow Switch [► 24]. If a pressure switch being installed: • Electrically connect the pressure switch, see Wiring Diagram Pressure Switch (Optional) [► 25]. Instruction Manual COBRA NC 0100-0300 B WCV_EN_en 15 / 44... -
Page 16: Dilution Gas System Connection (Optional)
Dry nitrogen Gas temperature °C 0 ... 60 Maximum gas pressure Recommended pressure setting at the pressure regulating valve (PRV) Filtration µm Recommended flow rate SLM* * standard litre per minute 16 / 44 Instruction Manual COBRA NC 0100-0300 B WCV_EN_en... -
Page 17: Purge Gas System Connection (Optional)
Recommended pressure setting at the pressure regulating valve (PRV) Filtration µm Recommended flow rate SLM* ≥ 40 for NC 0100-0200 B ≥ 50 for NC 0300 B * standard litre per minute Instruction Manual COBRA NC 0100-0300 B WCV_EN_en 17 / 44... -
Page 18: Filling Oil
• Only use an oil type which has previously been approved and recommended by Busch. For oil type and oil capacity see Technical Data [► 39] and Oil [► 39]. Oil filling at the motor side Check oil level 18 / 44 Instruction Manual COBRA NC 0100-0300 B WCV_EN_en... - Page 19 __ / __ / ____ 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 0100-0300 B WCV_EN_en 19 / 44...
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Page 20: Filling Cooling Liquid
NC 0300 B Check cooling liquid level 5.5 Liquid Flushing Device Installation (Optional) Flushing liquid fill plug Flushing liquid vessel Flow regulator Inlet flange Level indicator Level switch Solenoid valve 20 / 44 Instruction Manual COBRA NC 0100-0300 B WCV_EN_en... -
Page 21: Fitting The Coupling
• Mount the motor on the machine by including the coupling spider. For further coupling information, go to www.ktr.com and download the instruction man- ® ual of the ROTEX coupling. Instruction Manual COBRA NC 0100-0300 B WCV_EN_en 21 / 44... -
Page 22: Electrical Connection
• Provide an overload protection according to EN 60204-1 for the motor. • Make sure that the motor of the machine will not be affected by electric or electro- magnetic disturbance from the mains; if necessary seek advice from Busch. • Connect the protective earth conductor. -
Page 23: Wiring Diagram Three-Phase Motor (Pump Drive)
Risk of damage to the machine! • Operation in the wrong direction of rotation can destroy the machine in a short time! Prior to start-up, ensure that the machine is operated in the right direction. Instruction Manual COBRA NC 0100-0300 B WCV_EN_en 23 / 44... -
Page 24: Wiring Diagram Solenoid Valve (Optional)
2 (-) 5.8 Electrical Connection of the Monitoring Devices NOTE In order to prevent potential nuisance alarms, Busch recommends that the control sys- tem is configured with a time delay of at least 20 seconds. 5.8.1 Wiring Diagram Temperature Switch Part no.: 0651 555 985... -
Page 25: Wiring Diagram Pressure Switch (Optional)
Risk of damage to hearing! If persons are present in the vicinity of a non noise insulated machine over extended periods: • Make sure that ear protection is being used. Instruction Manual COBRA NC 0100-0300 B WCV_EN_en 25 / 44... -
Page 26: Conveying Condensable Vapours
(solenoid valve) • Close the inlet system* valve * optional accessories • Continuously drain condensate from the condensate drain plug (CD) of the silencer (SI) (Optional). 26 / 44 Instruction Manual COBRA NC 0100-0300 B WCV_EN_en... -
Page 27: Liquid Flushing Procedure
START The flushing duration depends on the Open the purge gas Close the purge gas Close the inlet valve application (solenoid valve) min. 200 seconds to render the machine inert Instruction Manual COBRA NC 0100-0300 B WCV_EN_en 27 / 44... -
Page 28: Maintenance
Risk of injuries! Risk of premature failure and loss of efficiency! • Respect the maintenance intervals or ask your Busch representative for service. • Shut down the machine and lock against inadvertent start up. • Turn off the water supply. -
Page 29: Maintenance Schedule
• When the machine is stopped, wait 1 minute before checking the oil level. Oil sight glass on suction side Oil sight glass on motor side • Fill up if necessary, see Oil Filling [► 18]. Instruction Manual COBRA NC 0100-0300 B WCV_EN_en 29 / 44... -
Page 30: Cooling Liquid Level Inspection
• Remove the cooling liquid fill plug (CLF). • Check cooling liquid level. For NC 0200 – 0300 B: • Check cooling liquid level. • Fill up if necessary, see Filling Cooling Liquid [► 20]. 30 / 44 Instruction Manual COBRA NC 0100-0300 B WCV_EN_en... -
Page 31: Oil Change
Loss of efficiency! • Only use an oil type which has previously been approved and recommended by Busch. Oil draining at the motor side Cleaning cloth Magnetic plug Drain pan Instruction Manual COBRA NC 0100-0300 B WCV_EN_en 31 / 44... - Page 32 Oil draining at the suction side Magnetic plug Cleaning cloth Drain pan For oil type and oil capacity see Technical Data [► 39] and Oil [► 39]. Oil filling at the motor side Check oil level 32 / 44 Instruction Manual COBRA NC 0100-0300 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 0100-0300 B WCV_EN_en 33 / 44...
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Page 34: Cooling Liquid Change
For cooling liquid type and cooling liquid capacity see Technical Data [► 39] and Cooling Liquid [► 39]. NC 0200 B NC 0100 B NC 0300 B NC 0200 B NC 0100 B NC 0300 B Check cooling liquid level 34 / 44 Instruction Manual COBRA NC 0100-0300 B WCV_EN_en... -
Page 35: Overhaul
• Decontaminate the machine as much as possible and state the contamination status in a ‘Declaration of Contamination’. Busch will only accept machines that come with a completely filled in and legally bind- ing signed ‘Declaration of Contamination’ (form downloadable from www.buschvacuum.com). -
Page 36: Spare Parts
• 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 is no standard spare parts kits available for this product, if you require Busch genuine parts: •... -
Page 37: Troubleshooting
The machine runs in the • Check the direction of ro- wrong direction. tation, see Wiring Dia- gram Three-Phase Mo- tor. Internal parts are worn or • Repair the machine (con- damaged. tact Busch). Instruction Manual COBRA NC 0100-0300 B WCV_EN_en 37 / 44... - Page 38 [► 31]. The machine runs too hot. • See problem "The ma- chine runs too hot". For the solution of problems not mentioned in the troubleshooting chart contact your Busch representative. 38 / 44 Instruction Manual COBRA NC 0100-0300 B WCV_EN_en...
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Page 39: Technical Data
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. 14 Oil VE 101 ISO-VG Part number 1 L packaging 0831 000 099 Part number 5 L packaging 0831 000 100 Instruction Manual COBRA NC 0100-0300 B WCV_EN_en 39 / 44... -
Page 40: Eu Declaration Of Conformity
15 EU Declaration of Conformity This Declaration of Conformity and the CE-mark 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 manufac- turer. - Page 41 Note...
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