BUSCH COBRA NX 0450 A Instruction Manual
Water-cooled dry screw vacuum pumps
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Summary of Contents for BUSCH COBRA NX 0450 A
- Page 1 COBRA Dry Screw Vacuum Pumps NX 0450 A, NX 0650 A Water-Cooled Version (WCV) Instruction Manual 0870565358 | B0008_en-US | Original instructions 11/3/2022...
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Page 2: Table Of Contents
Table of Contents Table of Contents Safety..................................Product Description ............................. Operating Principle ............................. Intended Use ............................... Start Controls ............................... Standard Features............................... 2.4.1 Water Cooling............................2.4.2 Temperature Switch ..........................2.4.3 Sealing Systems............................. Optional Accessories............................2.5.1 Gas Ballast Valve ........................... 2.5.2 Silencer ..............................2.5.3 Barrier Gas System .......................... - Page 3 Table of Contents UK Declaration of Conformity ..........................Instruction Manual COBRA NX 0450-0650 A WCV_EN_en 3 | 40...
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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
Product Description | 2 Product Description IN, IS Description Suction connection (Inlet) Discharge connection (Outlet) Barrier gas connection Barrier gas flow meter Barrier gas manometer Barrier gas pressure regulator Condensate drain Cooling water drain plug Cooling water inlet Cooling water outlet Eye bolt Gas ballast valve Inlet screen... -
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
- Cast iron - Steel - Aluminium - Fluoroelastomer (FKM/FPM) ● In doubt, please contact your Busch representative. Start Controls The machine comes without start controls. The control of the machine is to be provided in the course of installation. -
Page 8: Transport
3 | Transport Transport WARNING Suspended load. Risk of severe injury! ● Do not walk, stand or work under suspended loads. WARNING Lifting the machine using the motor eye bolt. Risk of severe injury! ● Do not lift the machine using the eye bolt fitted to the motor. Only lift the machine as shown. NOTICE In case the machine is already filled with oil. -
Page 9: Storage
Storage | 4 Storage ● Seal all apertures with adhesive tape or reuse provided caps. If the machine is to be stored for more than 3 months: ● Wrap the machine in a corrosion inhibiting film. ● Store the machine indoors, dry, dust free and if possible in original packaging preferably at temperatures between 5 ... -
Page 10: Installation
● Make sure that the cooling water complies with the requirements, see Cooling Water Connection [➔ 13]. 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. 10 | 40... -
Page 11: Connecting Lines / Pipes
– ISO DN100, DIN 28404 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. Instruction Manual COBRA NX 0450-0650 A WCV_EN_en... -
Page 12: Discharge Connection
5 | Installation 5.2.2 Discharge Connection Description Discharge variants (without silencer) NOTICE Discharge gas flow obstructed. Risk of damage to the machine! ● Make sure that the discharged gas will flow without obstruction. Do not shut off or throttle the discharge line or use it as a pressurized air source. -
Page 13: Cooling Water Connection
Installation | 5 5.2.3 Cooling Water Connection Description Cooling water inlet Cooling water outlet ● Connect the cooling water connections (CWI / CWO) to the water supply. Connection size: – G1/2, ISO 228-1 (CWI / CWO) ● Make sure that the cooling water complies with the following requirements: Supply capacity l/min 4 ... 10 for NX 0450 A... -
Page 14: Barrier Gas System Connection (Optional)
● Make sure that the water flow of the cooling water at the outlet (CWO) is monitored. If it is not possible, Busch recommends calibrating the flow with one or two orifices depending on the water pressure, see the following table:... -
Page 15: Filling 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 [➔ 36]. Instruction Manual COBRA NX 0450-0650 A WCV_EN_en... - 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 Instruction Manual COBRA NX 0450-0650 A WCV_EN_en...
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Page 17: Electrical Connection
● Make sure that the motor of the machine will not be affected by electric or electro- magnetic dis- turbance from the mains, if necessary seek advice from Busch. ● Make sure that the EMC of the machine is compliant with the requirements of your supply net- work system, if necessary provide further interference suppression (EMC of the machine, see EU Declaration of Conformity [➔ 37] or UK Declaration of Conformity [➔ 38]). - Page 18 6 | Electrical Connection ● Busch recommends installing a type B residual protective device suitable for the electrical in- stallation. ● Provide a lockable disconnect switch or an emergency stop switch on the power line so that the machine is completely secured in case of an emergency situation.
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Page 19: Machine Delivered With A Variable Speed Drive (Option)
● 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 20: Wiring Diagram Three-Phase Motor (Pump Drive)
6 | Electrical Connection Wiring Diagram Three-Phase Motor (Pump Drive) Delta connection (low voltage): Star connection (high voltage): Double star connection, multi-voltage motor Star connection, multi-voltage motor with 12 with 12 pins (low voltage): pins (high voltage): Delta connection, multi-voltage motor with 12 pins (middle voltage): NOTICE Incorrect direction of rotation. -
Page 21: Electrical Connection Of The Monitoring Devices
● Switch any two of the motor phase wires. Electrical Connection of the Monitoring Devices 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. 6.4.1 Wiring Diagram Temperature Switch Part no.: 0651 563 762... -
Page 22: Commissioning
7 | Commissioning Commissioning 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. CAUTION Noise of running machine. Risk of damage to hearing! If persons are present in the vicinity of a non noise insulated machine over extended periods: ●... - Page 23 (e.g. "dead leg") with drain. ● Water vapor within the gas flow is tolerated within certain limits. The conveyance of other vapors shall be agreed upon with Busch. Instruction Manual COBRA NX 0450-0650 A WCV_EN_en...
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Page 24: Maintenance
8 | Maintenance Maintenance DANGER Live wires. Risk of electrical shock. ● Electrical installation work must only be executed by qualified personnel. DANGER Maintenance work without disconnecting the variable speed drive. Risk of electrical shock. ● Disconnect and isolate the variable speed drive before attempting any work on it. High voltages are present at the terminals and within the variable speed drive for up to 10 min- utes after disconnection of the electrical supply. -
Page 25: Maintenance Schedule
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 26: Oil Level Inspection
● Change the oil of the gear and bearing housings (both sides), see Oil Change [➔ 27]. ● Clean the magnetic plugs (MP). Every 25000 hours or after 4 ● Have a major overhaul on the machine (contact Busch). years Oil Level Inspection ● Shut down the machine. -
Page 27: Cleaning The Gas Ballast Filter (Optional)
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. Instruction Manual COBRA NX 0450-0650 A WCV_EN_en 27 | 40... - Page 28 8 | Maintenance Description Magnetic plug Description Magnetic plug For oil type and oil capacity see Technical Data and Oil [➔ 36]. 28 | 40 Instruction Manual COBRA NX 0450-0650 A WCV_EN_en...
- Page 29 __ / __ / ____ 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 NX 0450-0650 A WCV_EN_en 29 | 40...
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Page 30: 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 31: Decommissioning
Decommissioning | 10 Decommissioning DANGER Live wires. Risk of electrical shock. ● Electrical installation work must only be executed by qualified personnel. CAUTION Hot surface. Risk of burns! ● Prior to any action requiring touching the machine, let the machine cool down first. ●... -
Page 32: 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 33: Troubleshooting
Solid foreign matter has en- ● Remove the solid foreign tered the machine. matter or repair the ma- chine (contact Busch). ● Check the inlet screen (IS) at the suction connection. The temperature switch (TS) ● Let the machine cool down. - Page 34 Oil Change [➔ 27]. 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. 34 | 40 Instruction Manual COBRA NX 0450-0650 A WCV_EN_en...
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Page 35: Technical Data
Technical Data | 13 Technical Data NX 0450 A NX 0650 A Pumping speed (50Hz / 60Hz) m³/h 350 / 420 650 / 650 Ultimate pressure hPa (mbar) abs. ≤0.1 (without gas ballast) Ultimate pressure (50Hz / 60Hz) hPa (mbar) abs. ≤0.5 / ≤0.1 ≤0.5 / ≤0.5 (with gas ballast) -
Page 36: Oil
14 | Oil VSC 100 ISO-VG Part number 1 L packaging 0831 168 356 Part number 5 L packaging 0831 168 357 36 | 40 Instruction Manual COBRA NX 0450-0650 A WCV_EN_en... -
Page 37: 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 38 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 39 Notes Instruction Manual COBRA NX 0450-0650 A WCV_EN_en 39 | 40...
- Page 40 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.