BUSCH COBRA NX 0450 A Instruction Manual
Dry screw vacuum pumps water-cooled version (wcv)
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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 | B0009_en-US | Original instructions 8/27/2024...
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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 .............................. - 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 Gas ballast silencer (NX 0650 A only) -
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. -
Page 7: Start Controls
- Steel - Aluminum - Fluor elastomer (FKM/FPM) ● Contact your Busch representative for further advice and information. 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 hermetically all apertures with the caps provided with the machine, or with adhesive tape if the caps are no longer available. ● Store the machine indoors, in a dry place, away from dust and vibrations 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 [➔ 12]. If the machine is installed at an altitude greater than 1000 meters above sea level: ● Contact your Busch representative, the motor must be derated or the ambient temperature limited. Connecting Lines / Pipes ●... -
Page 11: Suction Connection
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. ● Make sure that the connection lines cause no stress on the connections of the machine. There- fore, we recommend installing flexible lines on the suction and discharge connections. -
Page 12: Cooling Water Connection
5 | Installation 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. Connection size(s): At the machine discharge connection: –... - Page 13 ● 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, according to the following table:...
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Page 14: Barrier Gas System Connection (Optional)
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 | 40 Instruction Manual COBRA NX 0450-0650 A WCV_EN_en... - Page 15 ● Write down the oil change date on the sticker. 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 15 | 40...
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Page 16: Electrical Connection
● Make sure that the motor of the machine will not be affected by electric or electromagnetic dis- turbance from the mains. If necessary, contact your Busch representative for more information. ● 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 [➔ 38] or UK Declaration of Conformity [➔ 39]). - Page 17 Electrical Connection | 6 ● 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 18: 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 a defective insulation. ● Busch recommends installing a type B residual protective device suitable for the electrical in- stallation. -
Page 19: Wiring Diagram Three-Phase Motor (Pump Drive)
Electrical Connection | 6 NOTICE The admissible motor speed exceeds the recommendation. Risk of damage to the machine! ● Check the admissible motor speed range, see Technical Data. NOTICE Incorrect connection. Risk of damage to the variable speed drive! ● The wiring diagrams given below are typical. Check the connection instructions/diagrams. Wiring Diagram Three-Phase Motor (Pump Drive) Delta connection (low voltage): Star connection (high voltage):... - Page 20 6 | Electrical Connection Star connection, multi-voltage motor with 12 pins (high voltage): Delta connection, multi-voltage motor with 12 pins (middle voltage): NOTICE Incorrect direction of rotation. 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.
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Page 21: Electrical Connection Of The Monitoring Devices
Electrical Connection | 6 Electrical Connection of the Monitoring Devices NOTE To prevent potential nuisance alarms, Busch recommends that the control system is config- ured with a time delay of at least 20 seconds. 6.4.1 Wiring Diagram Temperature Switch Part no.: 0651 563 762 Connector: M12x1, 4-pin Electrical data: U = ≤... -
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 people are present in the vicinity of a machine that is not insulated from noise for extended peri- ods of time: ●... -
Page 23: Conveying Condensable Vapors
(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... -
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 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! ●...
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Page 26: Maintenance Schedule
● Change the oil of the gear and bearing housings (both sides), see Oil Change [➔ 28]. ● Clean the magnetic plugs (MP). Every 25000 hours or after 4 ● Have a major overhaul on the machine (contact Busch). years Oil Level Inspection ● Stop the machine. -
Page 27: Cleaning The Inlet Screen
Maintenance | 8 Cleaning the Inlet Screen Description Use a hexagonal key Use compressed air and wear protec- tive eyewear and mask Cleaning the Gas Ballast Filter (Optional) Description Use a 36 mm wrench Use compressed air and wear protec- tive eyewear and mask Instruction Manual COBRA NX 0450-0650 A WCV_EN_en 27 | 40... -
Page 28: 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 28 | 40 Instruction Manual COBRA NX 0450-0650 A WCV_EN_en... - Page 29 Maintenance | 8 Description Magnetic plug For oil type and oil capacity see Technical Data and Oil [➔ 37]. Instruction Manual COBRA NX 0450-0650 A WCV_EN_en 29 | 40...
- Page 30 ● Write down the oil change date on the sticker. If there is no sticker (part no. 0565 568 959) on the machine: ● Order it from your Busch representative. 30 | 40 Instruction Manual COBRA NX 0450-0650 A WCV_EN_en...
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Page 31: Overhaul
● Decontaminate the machine as much as possible and state the contamination status in a ‘Declaration of Contamination’. Busch will only accept machine accompanied by a signed, fully completed and legally binding "decla- ration of contamination", downloadable from the following link: buschvacuum.com/declaration-of- contamination. -
Page 32: Decommissioning
10 | Decommissioning Decommissioning DANGER Live wires. Risk of electrical shock! ● Electrical installation work must only be executed by qualified personnel. CAUTION Hot surface. Risk of burns! ● Before doing anything that requires touching the machine, let it cool down first. ●... -
Page 33: Spare Parts
Risk of premature failure! Loss of efficiency! ● Use only original Busch spare parts, consumables and supplies to ensure correct operation of the machine and to validate the warranty. There are no standard spare parts kits available for this product. -
Page 34: 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 35 Oil Change [➔ 28]. The machine runs too hot. ● See problem "The machine runs too hot". For resolution of problems not listed in the troubleshooting table, contact your Busch representa- tive. Instruction Manual COBRA NX 0450-0650 A WCV_EN_en 35 | 40...
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Page 36: Technical Data
13 | Technical Data Technical Data NX 0450 A NX 0650 A Pumping speed (50 / 60 Hz) m³/h 350 / 420 650 / 650 Ultimate pressure without gas bal- hPa (mbar) abs. ≤ 0.1 ≤ 0.1 last Ultimate pressure (50 / 60 Hz) with hPa (mbar) abs. ≤... -
Page 37: Oil
Oil | 14 VSC 100 ISO-VG Oil type Synthetic Part number 1 L packaging 0831 168 356 Part number 5 L packaging 0831 168 357 Part number 10 L packaging 0831 210 162 Part number 20 L packaging 0831 168 359 Instruction Manual COBRA NX 0450-0650 A WCV_EN_en 37 | 40... -
Page 38: 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 39 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 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.
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