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Troubleshooting | 12

Instruction Manual COBRA NX 0950 A WCV_EN_en

37 | 44

Problem

Possible Cause

Remedy

The machine runs too hot.

Insufficient cooling.

●

Make sure to comply with
the cooling water require-
ments, see Cooling Water
Connection [

➔

15].

Ambient temperature too high.

●

Observe the permitted am-
bient temperature, see
Technical Data.

Temperature of the process
gases at the inlet too high.

●

Observe the permitted gas
inlet temperature, see Tech-
nical Data.

Oil level too low.

●

Top up oil.

The oil is black.

Oil change intervals are too
long.

●

Drain the oil and fill in new
oil, see Oil Change [

➔

30].

The machine runs too hot.

●

See problem "The machine
runs too hot".

For the solution of problems not mentioned in the troubleshooting chart contact your Busch repre-
sentative.

Содержание COBRA NC 0950 A

Страница 1: ...Get technical data instruction manuals service kits COBRA Dry Screw Vacuum Pumps NX 0950 A Water Cooled Version WCV Instruction Manual 0870222540 0003_en US Original instructions 10 27 2022...

Страница 2: ...3 Cooling Water Connection 15 5 2 4 Barrier Gas System Connection Optional 16 5 3 Filling Oil 17 6 Electrical Connection 19 6 1 Machine delivered with a Variable Speed Drive 20 6 2 Electrical Connect...

Страница 3: ...Table of Contents Instruction Manual COBRA NX 0950 A WCV_EN_en 3 44 13 Technical Data 38 14 Oil 39 15 EU Declaration of Conformity 40 16 UK Declaration of Conformity 41...

Страница 4: ...o state of the art methods Never theless residual risks may remain as described in the following chapters and in accordance with the chapter Intended Use 6 This instruction manual highlights potential...

Страница 5: ...BGC Barrier gas connection BGF Barrier gas flow meter BGM Barrier gas manometer BGR Barrier gas pressure regulator CD Condensate drain CWD Cooling water drain plug CWI Cooling water inlet CWO Cooling...

Страница 6: ...re is no need for a lubrication or an operating fluid in the compression chamber 2 2 Intended Use WARNING In case of foreseeable misuse outside the intended use of the machine Risk of injuries Risk of...

Страница 7: ...nt T 70 C Trip the machine must be stopped pin 1 2 see Electrical Connection of the Monitoring Devices 24 2 4 3 Sealing Systems The machine is equipped with labyrinth seals on the motor side and sucti...

Страница 8: ...1 Description 1 Connection size G3 2 5 5 Inlet Check Valve In order to avoid reverse rotation after switching off the machine can be equipped with an inlet check valve The inlet check valve also preve...

Страница 9: ...already filled with oil 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 t...

Страница 10: ...uction Manual COBRA NX 0950 A WCV_EN_en 2 1 Description 1 Minimum length 400 mm 2 Minimum length 400 mm Check the machine for transport damage If the machine is secured to a base plate Remove the mach...

Страница 11: ...n lose efficiency because of electrochemical processes In the worst case it can lead to a short circuit and therefore to a damage to the variable speed drive of the machine Connect the machine every 1...

Страница 12: ...space or location is vented such that sufficient cooling of the ma chine is provided Make sure that cooling air inlets and outlets of the motor and VFD fans are not covered or ob structed and that th...

Страница 13: ...er line sizes in order to avoid a loss of effi ciency Seek advice from your Busch representative 5 2 1 Suction Connection WARNING Unprotected suction connection Risk of severe injury Do not put hand o...

Страница 14: ...on 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 G3 horizontal orientable 180 ISO DN100 DIN 28404 vertical...

Страница 15: ...Supply capacity l min 8 16 Water pressure bar 1 6 Supply temperature C 10 30 Required pressure differential across supply and return bar 1 Cooling water supply temperature in Fahrenheit degrees 50 86...

Страница 16: ...meter MAN Manometer PRV Pressure regulating valve Connect the barrier gas connection BGC to the gas supply Connection size G1 4 ISO 228 1 Make sure that the gas complies with the following requiremen...

Страница 17: ...CV_EN_en 17 44 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 For oil...

Страница 18: ...When the oil filling is achieved Write down the oil change date on the sticker Last oil change __ __ ____ Oil type see nameplate Change interval see instruction manual If there is no sticker part no 0...

Страница 19: ...red by the customer on its installation The electrical installation must comply with the applicable national and international standards NOTICE Electromagnetic compatibility Make sure that the motor o...

Страница 20: ...ble motor speed exceeds the recommendation Risk of damage to the machine Check the admissible motor speed range see Technical Data NOTICE The motor frequency is below 20 Hz Risk of damage to the machi...

Страница 21: ...ng applies to machines equipped with an on board variable speed drive Make sure that the power supply for the drive is compatible with the data on the nameplate of the variable speed drive Make sure t...

Страница 22: ...6 3 Wiring Diagram Variable Speed Drive VSD CAUTION The machine can start immediately when power is supplied Risk of inadvertent start up Make sure that a start up will not lead to a dangerous situati...

Страница 23: ...machine is a custom or a standard one 6 5 Wiring Diagram Three Phase Motor Pump Drive The following applies to machines not equipped with an on board variable speed drive and on which an external spee...

Страница 24: ...e changed Switch any two of the motor phase wires 6 6 Electrical Connection of the Monitoring Devices NOTE In order to prevent potential nuisance alarms Busch recommends that the control system is con...

Страница 25: ...ricating a dry running machine compression chamber Risk of damage to the machine Do not lubricate the compression chamber of the machine with oil or grease Make sure that the installation conditions s...

Страница 26: ...min Ensure that the barrier gas system dry compressed air is connected Check the volume flow on the barrier gas flow meter BGF see Barrier Gas System Connection Optional 16 Make sure that the air gas...

Страница 27: ...in utes after disconnection of the electrical supply Always ensure by using a suitable multimeter that no voltage is present on any drive power termi nals prior to commencing any work DANGER Live wire...

Страница 28: ...l operating conditions The intervals given below are considered as starting values which should be shortened or extended as appropri ate Particularly harsh applications or heavy duty operation such as...

Страница 29: ...Clean the magnetic plugs MP Every 25000 hours or after 4 years Have a major overhaul on the machine contact Busch 8 2 Oil Level Inspection Shut down the machine When the machine is stopped wait 1 min...

Страница 30: ...st Filter Optional 1 2 Description 1 Use a 36 mm wrench 2 Use compressed air and wear protec tive eyewear and mask 8 5 Oil Change NOTICE Use of an inappropriate oil Risk of premature failure Loss of e...

Страница 31: ...Maintenance 8 Instruction Manual COBRA NX 0950 A WCV_EN_en 31 44 1 Description 1 Magnetic plug 1 Description 1 Magnetic plug For oil type and oil capacity see Technical Data and Oil 39...

Страница 32: ...hen the oil filling is achieved Write down the oil change date on the sticker Last oil change __ __ ____ Oil type see nameplate Change interval see instruction manual If there is no sticker part no 05...

Страница 33: ...y dismantling of the machine that goes beyond anything that is described in this manual should be done by Busch authorized technicians In case of the machine having conveyed gas that was contaminated...

Страница 34: ...up Disconnect the power supply Turn off the water supply If the machine is equipped with a barrier gas system Close the barrier gas supply Vent the connected lines to atmospheric pressure Drain the c...

Страница 35: ...mmended for the correct functioning of the machine and to validate the warranty Spare parts available Spare part Description Part no Inlet filter cartridge Inlet filter cartridge paper 0532 000 006 In...

Страница 36: ...ction connection The temperature switch TS reached the switch point Let the machine cool down See problem The machine runs too hot The motor is defective Replace the motor The machine does not reach t...

Страница 37: ...he permitted am bient temperature see Technical Data Temperature of the process gases at the inlet too high Observe the permitted gas inlet temperature see Tech nical Data Oil level too low Top up oil...

Страница 38: ...cuit breaker MCCB A C 50 SCCR 10kA 400V Noise level EN ISO 2151 dB A 75 Ambient temperature range C 5 40 F 41 104 Max allowable counter pressure at the discharge hPa mbar rel 200 TORR 150 Max allowabl...

Страница 39: ...Oil 14 Instruction Manual COBRA NX 0950 A WCV_EN_en 39 44 14 Oil VSC 100 ISO VG 100 Part number 1 L packaging 0831 168 356 Part number 5 L packaging 0831 168 357...

Страница 40: ...ces in electrical and electronic equipment incl all related applicable amend ments and comply ies with the following designated standards that have been used to fulfill those provisions Standards Titl...

Страница 41: ...the use of certain hazardous substances in Electrical and Electronic Equipment Regulations 2021 and comply ies with the following designated standards that have been used to fulfill those provisions S...

Страница 42: ...42 44 Instruction Manual COBRA NX 0950 A WCV_EN_en Notes...

Страница 43: ...Instruction Manual COBRA NX 0950 A WCV_EN_en 43 44...

Страница 44: ...esence In every country highly competent local personnel delivers custom tailored support backed by a global network of expertise Wherever you are Whatever your business We are there for you Busch com...

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