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Summary of Contents for BUSCH COBRA NC 2500 B
- Page 1 Instruction Manual COBRA Dry Screw Vacuum Pumps NC 2500 B (Water-Cooled Version) 0870558967/A0006_en / Original instructions / Modifications reserved 14/09/2021...
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Page 2: Table Of Contents
7.2 Oil Level Inspection ......................26 7.3 Cooling Liquid Level Inspection ..................26 7.4 Oil Change ........................27 7.5 Cooling Liquid Change....................30 8 Overhaul..........................34 9 Decommissioning ........................35 9.1 Dismantling and Disposal....................35 2 / 44 Instruction Manual COBRA NC 2500 B WCV_EN_en... - Page 3 Table of Contents 10 Spare Parts ..........................35 11 Troubleshooting........................35 12 Technical Data........................38 13 Cooling Liquid ........................38 14 Oil ............................38 15 EU Declaration of Conformity ....................39 16 UK Declaration of Conformity....................40 Instruction Manual COBRA NC 2500 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
Vibration transmitter (option) Silencer (option) Thermometer TSA1 Resistance thermometer (cooling liquid temperature) TSA2 Resistance thermometer (exhaust gas Thermostatic valve temperature) *For additional cooling liquid drain plugs (CLD), see Cooling Liquid Change [► 30]. Instruction Manual COBRA NC 2500 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 [► 38]. -
Page 7: Standard Features
Other sealing systems are optionally available, see Mechanical Seals [► 8]. Sealing systems prevent the process gas going to the bearings chambers. The sealing systems include a barrier gas system, see Barrier Gas System Connection [► 14]. Instruction Manual COBRA NC 2500 B WCV_EN_en 7 / 44... -
Page 8: Optional Accessories
– 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 / 44 Instruction Manual COBRA NC 2500 B WCV_EN_en... -
Page 9: Transport
Machine weight: see the technical data or the nameplate (NP) l2 & l3 = ~650 mm l1 = ~430 mm The air filter must be removed before lifting the machine Instruction Manual COBRA NC 2500 B WCV_EN_en 9 / 44... -
Page 10: Storage
Change [► 27]. This protects the mechanical seals during a long storage. Use the standard pump oil, see chapter Oil [► 38]. • Before restarting the machine, drain the oil to the normal oil level, see “Oil draining” in chapter Oil Change [► 27]. 10 / 44 Instruction Manual COBRA NC 2500 B WCV_EN_en... -
Page 11: Installation
• Check the cooling liquid level, see Cooling Liquid Level Inspection [► 26]. 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 12: 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... -
Page 13: Cooling Water Connection
Materials in contact with the cooling water Stainless steel NOTE Water hardness unit conversion. 1 mg/l (ppm) = 0.056 °dh (german degree) = 0.07 °e (english degree) = 0.1 °fH (french degree) Instruction Manual COBRA NC 2500 B WCV_EN_en 13 / 44... -
Page 14: Barrier Gas System Connection
5.3 Filling Oil 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. 14 / 44 Instruction Manual COBRA NC 2500 B WCV_EN_en... - Page 15 For oil type and oil capacity see Technical Data [► 38] and Oil [► 38]. Oil filling at the motor side Check oil level Oil filling at the suction side Check oil level Instruction Manual COBRA NC 2500 B WCV_EN_en 15 / 44...
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Page 16: Filling Cooling Liquid
For cooling liquid type and cooling liquid capacity see Technical Data [► 38] and Cooling Liquid [► 38]. Cooling liquid filling Cooling liquid vent plug (CLV1) Fill up to the top of the vent orifice (CLV1) 16 / 44 Instruction Manual COBRA NC 2500 B WCV_EN_en... -
Page 17: 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 17 / 44... -
Page 18: 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 19: 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. Instruction Manual COBRA NC 2500 B WCV_EN_en 19 / 44... -
Page 20: Electrical Connection Of The Cooling Liquid Pump
• Make sure that the cooling liquid flows in the right direction according to the follow- ing illustration. 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. 20 / 44 Instruction Manual COBRA NC 2500 B WCV_EN_en... -
Page 21: Electrical Connection Of The Monitoring Devices
Installation | 5 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 Resistance Thermometer Part no.:... -
Page 22: Commissioning
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 replaced by another one. NOTE The wiring diagram is separately provided (specific sheet) with the machine. -
Page 23: Recommendations On Operation
– Rotational speed: max 50 Hz = 3000 min – Gas inlet temperature: max. 80 °C – Cooling gas: air or nitrogen – Temperature monitoring: standard setting Instruction Manual COBRA NC 2500 B WCV_EN_en 23 / 44... -
Page 24: Conveying Condensable Vapours
CAUTION Failing to properly maintain the machine. Risk of injuries! Risk of premature failure and loss of efficiency! • Respect the maintenance intervals or ask your Busch representative for service. 24 / 44 Instruction Manual COBRA NC 2500 B WCV_EN_en... -
Page 25: Maintenance Schedule
Clean or replace the air filter, if necessary. • Clean the magnetic plugs (MP). Every 16000 hours, at the • Have a major overhaul on the machine (contact least after 4 years Busch). Instruction Manual COBRA NC 2500 B WCV_EN_en 25 / 44... -
Page 26: Oil Level Inspection
• Fill up if necessary, see Oil Filling [► 14]. 7.3 Cooling Liquid Level Inspection • Shut down the machine. • Fill up if necessary, see Filling Cooling Liquid [► 16]. 26 / 44 Instruction Manual COBRA NC 2500 B WCV_EN_en... -
Page 27: Oil Change
Risk of premature failure! Loss of efficiency! • Only use an oil type which has previously been approved and recommended by Busch. Oil draining at the motor side Drain pan Instruction Manual COBRA NC 2500 B WCV_EN_en 27 / 44... - Page 28 7 | Maintenance Magnetic plug Drain pan Cleaning cloth Oil draining at the suction side Magnetic plug Cleaning cloth Drain pan 28 / 44 Instruction Manual COBRA NC 2500 B WCV_EN_en...
- Page 29 For oil type and oil capacity see Technical Data [► 38] and Oil [► 38]. Oil filling at the motor side Check oil level Oil filling at the suction side Check oil level Instruction Manual COBRA NC 2500 B WCV_EN_en 29 / 44...
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Page 30: Cooling Liquid Change
Risk of substantial cooling liquid flow! • Make sure to place sufficiently large drain pans under the machine before removing the cooling liquid drain plugs. Cooling liquid draining Drain pan 30 / 44 Instruction Manual COBRA NC 2500 B WCV_EN_en... - Page 31 Maintenance | 7 Additional cooling liquid draining points Bottom view of the machine Instruction Manual COBRA NC 2500 B WCV_EN_en 31 / 44...
- Page 32 7 | Maintenance Additional cooling liquid draining point 1 Drain pan Additional cooling liquid draining point 2 Drain pan 32 / 44 Instruction Manual COBRA NC 2500 B WCV_EN_en...
- Page 33 For cooling liquid type and cooling liquid capacity see Technical Data [► 38] and Cooling Liquid [► 38]. Cooling liquid filling Cooling liquid vent plug (CLV1) Fill up to the top of the vent orifice (CLV1) Instruction Manual COBRA NC 2500 B WCV_EN_en 33 / 44...
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Page 34: 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 35: Decommissioning
• 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 36 • Use one of the recom- noisily. suitable oil type. mended oils in the cor- rect quantity, see Oil [► 38]. Defective gears, bearings • Repair machine (contact or coupling element. Busch). 36 / 44 Instruction Manual COBRA NC 2500 B WCV_EN_en...
- Page 37 [► 27]. 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. Instruction Manual COBRA NC 2500 B WCV_EN_en 37 / 44...
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Page 38: 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 38 / 44 Instruction Manual COBRA NC 2500 B WCV_EN_en... -
Page 39: 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 40: Declaration Of Conformity
16 UK Declaration of Conformity This Declaration of Conformity and the UKCA-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 manu- facturer. - Page 41 Note...
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- Page 44 Busch Vacuum Solutions We shape vacuum for you. Argentina Denmark Malaysia South Africa info@busch.com.ar info@busch.dk busch@busch.com.my info@busch.co.za Australia Finland Mexico Spain sales@busch.com.au info@busch.fi info@busch.com.mx contacto@buschiberica.es Austria France Netherlands Sweden busch@busch.at busch@busch.fr info@busch.nl info@busch.se Bangladesh Germany New Zealand Switzerland sales@busch.com.bd info@busch.de sales@busch.co.nz...
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