BUSCH COBRA NC 0400 B Instruction Manual
Dry screw vacuum pumps, nc 0400 b, air-cooled version
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Summary of Contents for BUSCH COBRA NC 0400 B
- Page 1 Instruction Manual COBRA Dry Screw Vacuum Pumps NC 0400 B (air-cooled version) 0870549541/A0004_en / Original instructions / Modifications reserved 14/09/2021...
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Page 2: Table Of Contents
6.3 Gas Purging Procedure....................25 7 Maintenance ...........................26 7.1 Maintenance Schedule....................27 7.2 Oil Level Inspection ......................27 7.3 Cooling Liquid Level Inspection ..................28 7.4 Replacing the Gas Ballast Filter (Optional) ..............28 2 / 40 Instrucion Manual COBRA NC 0400 B ACV_EN_en... - Page 3 7.6 Cooling Liquid Change....................32 8 Overhaul..........................33 9 Decommissioning ........................33 9.1 Dismantling and Disposal....................33 10 Spare Parts ..........................34 11 Troubleshooting........................35 12 Technical Data........................37 13 Cooling Liquid ........................37 14 Oil ............................37 15 EU Declaration of Conformity ....................38 Instrucion Manual COBRA NC 0400 B ACV_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
Plug for manual rotation of rotors Silencer Safety valve Thermometer Temperature switch NOTE Technical term. In this instruction manual, we consider that the term ‘machine’ refers to the ‘vacuum pump’. Instrucion Manual COBRA NC 0400 B ACV_EN_en 5 / 40... -
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 [► 37]. -
Page 7: Temperature Switch
The sealing systems can be equipped with mechanical seals. The following variants are possible: – Oil lubricated single mechanical seals on the motor side and labyrinth seals on the suction side. Instrucion Manual COBRA NC 0400 B ACV_EN_en 7 / 40... -
Page 8: Nitrogen Panel
Tilting a machine that is already filled with oil can cause large quantities of oil to ingress into the cylinder. • Drain the oil prior to every transport or always horizontally transport the machine. 8 / 40 Instrucion Manual COBRA NC 0400 B ACV_EN_en... -
Page 9: Storage
Change [► 29]. This protects the mechanical seals during a long storage. Use the standard pump oil, see chapter Oil [► 37]. • Before restarting the machine, drain the oil to the normal oil level, see “Oil draining” in chapter Oil Change [► 29]. Instrucion Manual COBRA NC 0400 B ACV_EN_en 9 / 40... -
Page 10: Installation
• Check the cooling liquid level, see Cooling Liquid Level Inspection [► 28]. 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 11: Connecting Lines / Pipes
If a purge gas system or a liquid flushing device being installed: – DN80 PN16, EN 1092-1 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... -
Page 12: Barrier Gas System Connection (Optional)
• Electrically connect the solenoid valve (MV), see Wiring Diagram Solenoid Valve [► 21]. • Electrically connect the flow switch (FS) of the flow meter, see Wiring Diagram Flow Switch [► 22]. 12 / 40 Instrucion Manual COBRA NC 0400 B ACV_EN_en... -
Page 13: 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 Instrucion Manual COBRA NC 0400 B ACV_EN_en 13 / 40... -
Page 14: Purge Gas System Connection (Optional)
Gas temperature °C 0 ... 60 Maximum gas pressure Recommended pressure setting at the pressure regulating valve (PRV) Filtration µm Recommended flow rate SLM* ≥ 75 * standard litre per minute 14 / 40 Instrucion Manual COBRA NC 0400 B ACV_EN_en... -
Page 15: 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 [► 37] and Oil [► 37]. Oil filling at the motor side Check oil level Instrucion Manual COBRA NC 0400 B ACV_EN_en 15 / 40... - Page 16 __ / __ / ____ 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. 16 / 40 Instrucion Manual COBRA NC 0400 B ACV_EN_en...
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Page 17: Filling Cooling Liquid
Level switch Solenoid valve • Electrically connect the solenoid valve (MV), see Wiring Diagram Solenoid Valve [► 21]. • Electrically connect the two level switches (LS), see Wiring Diagram Level Switch [► 23]. Instrucion Manual COBRA NC 0400 B ACV_EN_en 17 / 40... -
Page 18: 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. 18 / 40 Instrucion Manual COBRA NC 0400 B ACV_EN_en... -
Page 19: 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 20: Wiring Diagram Three-Phase Motor (Pump Drive)
• Watch the fan wheel of the motor and determine the direction of rotation just before the fan wheel stops. If the rotation of the motor must be changed: • Switch any two of the motor phase wires. 20 / 40 Instrucion Manual COBRA NC 0400 B ACV_EN_en... -
Page 21: Wiring Diagram Solenoid Valve (Optional)
Delta connection (low voltage): Star connection (high voltage): U1 = Black ; V1 = Blue ; W1 = Brown ; U2 = Green ; V2 = White ; W2 = Yellow Instrucion Manual COBRA NC 0400 B ACV_EN_en 21 / 40... -
Page 22: Electrical Connection Of The Monitoring Devices
• Switch any two of the motor phase wires. 5.9 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. 5.9.1 Wiring Diagram Temperature Switch Part no.: 0651 556 533... -
Page 23: Wiring Diagram Level Switch (Optional)
CAUTION During operation the surface of the machine may reach temperatures of more than 70°C. Risk of burns! • Avoid contact with the machine during and directly after operation. Instrucion Manual COBRA NC 0400 B ACV_EN_en 23 / 40... -
Page 24: 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). 24 / 40 Instrucion Manual COBRA NC 0400 B ACV_EN_en... -
Page 25: 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 Instrucion Manual COBRA NC 0400 B ACV_EN_en 25 / 40... -
Page 26: 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. If the machine is equipped with a barrier gas system: •... -
Page 27: Maintenance Schedule
Oil sight glass on motor side • 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 [► 15]. Instrucion Manual COBRA NC 0400 B ACV_EN_en 27 / 40... -
Page 28: Cooling Liquid Level Inspection
• Fill up if necessary, see Filling Cooling Liquid [► 17]. 7.4 Replacing the Gas Ballast Filter (Optional) Busch genuine spare parts Gas ballast filter: part no. 0562 550 434 Discard the part 28 / 40 Instrucion Manual COBRA NC 0400 B ACV_EN_en... -
Page 29: 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 Instrucion Manual COBRA NC 0400 B ACV_EN_en 29 / 40... - Page 30 Oil draining at the suction side Cleaning cloth Magnetic plug Drain pan For oil type and oil capacity see Technical Data [► 37] and Oil [► 37]. Oil filling at the motor side Check oil level 30 / 40 Instrucion Manual COBRA NC 0400 B ACV_EN_en...
- Page 31 __ / __ / ____ 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. Instrucion Manual COBRA NC 0400 B ACV_EN_en 31 / 40...
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Page 32: Cooling Liquid Change
For cooling liquid type and cooling liquid capacity see Technical Data [► 37] and Cooling Liquid [► 37]. Radiator vent valve key Close the cooling liquid vent valve (CLV) when the cooling liquid is spilling out Resume cooling liquid filling Check cooling liquid level 32 / 40 Instrucion Manual COBRA NC 0400 B ACV_EN_en... -
Page 33: 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 34: 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 35: Troubleshooting
• Repair the machine. from remaining condensate. • Check the process and follow the recommenda- tion in case of Conveying Condensable Vapours [► 24]. The motor is defective. • Replace the motor. Instrucion Manual COBRA NC 0400 B ACV_EN_en 35 / 40... - Page 36 [► 29]. 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. 36 / 40 Instrucion Manual COBRA NC 0400 B ACV_EN_en...
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Page 37: 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 Instrucion Manual COBRA NC 0400 B ACV_EN_en 37 / 40... -
Page 38: 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 39 Note...
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