BUSCH COBRA NX 0950 A Instruction Manual Download Page 26 | Manualshive

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7 | Maintenance

26 / 36

0870222540_NX0950A_WCV_-_IM_en

7.5 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.

1

2

3

4

Cleaning cloth

Oil draining at the motor side

Magnetic plug

Drain pan

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Summary of Contents for COBRA NX 0950 A

Page 1: ...906 Chevenez Switzerland VACUUM APP Get technical data instruction manuals service kits 2020 03 17 0870222540 _en Original instructions Modifications reserved Dry Screw Vacuum Pumps NX 0950 A Water Co...

Page 2: ...nnection 12 5 2 3 Cooling Water Connection 13 5 2 4 Barrier Gas System Connection Optional 14 5 3 Filling Oil 14 5 4 Electrical Connection 17 5 4 1 Electrical Connection of the Variable Frequency Driv...

Page 3: ...Table of Contents 0870222540_NX0950A_WCV_ _IM_en 3 14 EU Declaration of Conformity 33...

Page 4: ...designed and manufactured according to state of the art meth ods Nevertheless residual risks may remain This instruction manual highlights potential hazards where appropriate Safety notes and warning...

Page 5: ...tor CD Condensate drain CWD Cooling water drain plug CWI Cooling water inlet CWO Cooling water outlet EB Eye bolt GB Gas ballast valve IN Suction connection IS Inlet screen MP Magnetic plug NP Namepla...

Page 6: ...non aggressive non toxic and non explosive gases 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 Th...

Page 7: ...s going to the bearings chambers Depending on the application the sealing systems efficiency can be improved with a barrier gas system see Barrier Gas System 7 2 5 Optional Accessories 2 5 1 Gas Balla...

Page 8: ...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 prevents fast ventin...

Page 9: ...machine is already filled with oil Tilting a machine that is already filled with oil can cause large quantities of oil to in gress into the cylinder Drain the oil prior to every transport or always ho...

Page 10: ...ue to a long storage time the capacitors of the variable frequency drive can lose effi ciency because of electrochemical processes In the worst case it can lead to a short circuit and therefore to a d...

Page 11: ...way Make sure that the oil sight glass OSG remains easily visible Make sure that enough space remains for maintenance work Make sure that the machine is placed or mounted horizontally a maximum of 1...

Page 12: ...G3 DN100 ISO K 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 5 2 2 Discharg...

Page 13: ...ng water complies with the following requirements 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 To reduce t...

Page 14: ...e gas complies with the following requirements Gas type Dry nitrogen or air Gas temperature C 0 60 Maximum gas pressure bar 13 Recommended pressure setting at the pressure regulating valve PRV bar 3 F...

Page 15: ...pacity see Technical Data 32 and Oil 32 1 2 B u s c h O i l MAX MIN 3 4 Oil filling at the motor side Check oil level 1 B u s c h O i l 2 MAX MIN 3 4 Oil filling at the inlet side Check oil level When...

Page 16: ...0870222540_NX0950A_WCV_ _IM_en Last oil change __ __ ____ 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 B...

Page 17: ...or Electrically connect the Variable Frequency Drive VFD see Electrical Connection of the Variable Frequency Drive DANGER Carry out any work on the variable frequency drive and motor Risk of electrica...

Page 18: ...ency Drive The following applies to machines equipped with an on board variable frequency drive VFD Make sure that the power supply for the drive is compatible with the data on the nameplate of the va...

Page 19: ...ies to machines equipped with an on board variable frequency drive VFD The Variable Frequency Drive VFD is delivered with preset factory parameters Please refer to the specific wiring diagram supplied...

Page 20: ...ency drive Connect the motor cables as shown in the below wiring diagram Delta connection low voltage Star connection high voltage NOTICE Incorrect direction of rotation Risk of damage to the machine...

Page 21: ...chine in short time Prior to commissioning the machine must be filled with oil see Filling Oil 14 NOTICE Lubricating a dry running machine compression chamber Risk of damage to the machine Do not lubr...

Page 22: ...ermissible number of starts does not exceed 6 starts per hour Those starts should be spread within the hour Make sure that the operating conditions comply with the Technical Data 32 After a few minute...

Page 23: ...tion work must only be executed by qualified personnel WARNING Machines contaminated with hazardous material Risk of poisoning Risk of infection If the machine is contaminated with hazardous material...

Page 24: ...for oil leaks in case of leaks have the machine repaired contact Busch Yearly Carry out a visual inspection and clean the machine from dust and dirt Check the electrical connections and the monitorin...

Page 25: ...Maintenance 7 0870222540_NX0950A_WCV_ _IM_en 25 36 7 3 Cleaning the Inlet Screen 8x 1 2 8x 3 hex key Compressed air 7 4 Cleaning the Gas Ballast Filter Optional 1 2 3 36 mm wrench Compressed air...

Page 26: ...5 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 1 2 3 4 Cleaning cloth Oi...

Page 27: ..._ _IM_en 27 36 1 2 3 4 Oil draining at the suction side Drain pan Magnetic plug Cleaning cloth For oil type and oil capacity see Technical Data 32 and Oil 32 1 2 B u s c h O i l MAX MIN 3 4 Oil fillin...

Page 28: ...the inlet side Check oil level 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 I...

Page 29: ...hat is described in this manual should be done through Busch WARNING Machines contaminated with hazardous material Risk of poisoning Risk of infection If the machine is contaminated with hazardous mat...

Page 30: ...Busch representative for the detailed spare parts list 11 Troubleshooting DANGER Live wires Risk of electrical shock Electrical installation work must only be executed by qualified personnel CAUTION H...

Page 31: ...un suitable oil type Use one of the recom mended oils in the correct quantity see Oil 32 Defective gears bearings or coupling element Repair machine contact Busch The machine runs too hot Insufficien...

Page 32: ...EN ISO 2151 dB A 75 Ambient temperature range C 5 40 Max allowable counter pressure at the dis charge hPa mbar 200 Max allowable gas inlet temperature C 50 hPa mbar 200 50 hPa mbar 70 Relative humidi...

Page 33: ...es in electrical and electronic equipment and the following standards Standard Title of the Standard EN ISO 12100 2010 Safety of machinery Basic concepts general principles of design EN ISO 13857 2008...

Page 34: ...Note...

Page 35: ...Note...

Page 36: ...ael service_sales busch co il Italy info busch it Japan info busch co jp Korea busch busch co kr Malaysia busch busch com my Mexico info busch com mx Netherlands info busch nl New Zealand sales busch...

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