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Troubleshooting | 11

0870573045_NC1500B_VR_A0002_IM_en

29 / 32

The machine runs too hot.

Insufficient cooling.

• Make sure to comply with

the cooling liquid require-
ments, see 

Cooling Liquid

Connection [

 11]

.

Ambient temperature too
high.

• Observe the permitted

ambient temperature, see

Technical Data [

 30]

.

Temperature of the process
gases at the inlet too high.

• Observe the permitted

gas inlet temperature, see

Technical Data [

 30]

.

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

[

 22]

.

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.

Summary of Contents for COBRA NC 1500 B

Page 1: ...ion Manual COBRA Dry Screw Vacuum Pumps NC 1500 B VR Vapour Recovery 0870573045 A0002_en Original instructions Modifications reserved 15 03 2019 Ateliers Busch S A Zone industrielle 2906 Chevenez Swit...

Page 2: ...harge Connection 11 5 2 3 Cooling Liquid Connection 11 5 3 Earth Connection 11 5 4 Filling Oil 12 5 5 Fitting the Coupling 14 5 5 1 Coupling Alignment 14 5 6 Electrical Connection 15 5 6 1 Wiring Diag...

Page 3: ...Table of Contents 0870573045_NC1500B_VR_A0002_IM_en 3 14 EU Declaration of Conformity 31...

Page 4: ...en 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 warni...

Page 5: ...connection CLO Cooling liquid outlet connection EB Eye bolt ECP Earth connection machine IN Suction connection INJ Injection point LS Level switch MP Magnetic plug MTB Motor terminal box NP Nameplate...

Page 6: ...vironmental conditions see Technical Data 30 2 3 Start Controls The machine comes without start controls The control of the machine is to be provided in the course of installation The machine can be o...

Page 7: ...e pump or in a suitable prepared ex haust spool piece at a distance of 100 mm from the pump outlet The machine must be stopped either when the cooling liquid temperature or when the exhaust gas temper...

Page 8: ...il can cause large quantities of oil to in gress into the cylinder Drain the oil prior to every transport or always horizontally transport the machine Make sure that the eyebolt EB is in faultless con...

Page 9: ...nal rules and safety regula tions i e in case of installation in a potentially explosive environment Make sure that the ambient conditions comply with the Technical Data 30 Make sure that the environm...

Page 10: ...build up an electrostatic charge Risk of severe injury Risk of explosion The connection lines must be made out of conductive material or provisions must be made against creating an electrostatic charg...

Page 11: ...hat the counter pressure also termed back pressure at the discharge con nection OUT does not exceed the maximum allowable discharge pressure see Tech nical Data 30 5 2 3 Cooling Liquid Connection CLI...

Page 12: ...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 type and oil capacity see Technical Data 30 and...

Page 13: ...l Oil filling at the suction side 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 manua...

Page 14: ...vered Axially adjust the hub in such a way until value E is reached When the coupling adjustment is done lock the coupling hub by tightening the radial screw Mount the motor on the machine Align the m...

Page 15: ...rom the mains if necessary seek advice from Busch Connect the protective earth conductor Two earth connections are also available on the machine base frame dia 10 5 mm Electrically connect the motor M...

Page 16: ...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 The intended rotation direction of the motor is def...

Page 17: ...1 Wiring Diagram Resistance Thermometer Part no PT100 0651 550 436 Transmitter 0643 536 800 Supplier reference PT100 Albert Balzer AG ref TWBa ADX50XG1 4X90DACB Transmitter Endress Hauser ref TMT 187...

Page 18: ...ling liquid outlet temperature TSA 0101 55 C Max operational temperature difference between cooling jacket and exhaust gas outlet 70 C The quantity of cooling liquid injected should be sufficient to e...

Page 19: ...ine is operated under normal operating conditions Measure the motor current and record it as reference for future maintenance and troubleshooting work 6 2 Switch Off Vent the machine at a pressure bet...

Page 20: ...aterial Wear appropriate personal protective equipment CAUTION Hot surface Risk of burns Prior to any action requiring touching the machine let the machine cool down first NOTICE Using inappropriate c...

Page 21: ...enance in tervals significantly Interval Maintenance work Monthly Check the oil level see Oil Level Inspection 22 Check the machine for oil leaks in case of leaks have the machine repaired contact Bus...

Page 22: ...AX MIN MAX MIN MAX MIN MAX MIN MAX MIN Oil sight glass on motor side Oil sight glass on suction side Fill up if necessary see Oil Filling 12 7 3 Oil Change NOTICE Use of an inappropriate oil Risk of p...

Page 23: ...Maintenance 7 0870573045_NC1500B_VR_A0002_IM_en 23 32 4 5 1 2 3 Cleaning cloth Magnetic plug 1 2 3 5 4 6 Oil draining at the suction side Cleaning cloth Drain pan Magnetic plug...

Page 24: ...acity see Technical Data 30 and Oil 30 1 4 MAX MIN 2 5 3 6 B u s c h O il Check oil level Oil filling at the motor side 4 1 2 3 MAX MIN B u s c h O il Check oil level Oil filling at the suction side W...

Page 25: ...plate Change interval see instruction manual If there is no sticker part no 0565 568 959 on the machine Order it from your Busch representative 7 4 Checking the Liquid Return System 1x 4x 1 2 3 4 5 1x...

Page 26: ...ctive equipment In case of the machine having conveyed gas that was contaminated with foreign materi als which are dangerous to health Decontaminate the machine as much as possible and state the conta...

Page 27: ...machine as scrap metal 10 Spare Parts NOTICE Use of non Busch genuine spare parts Risk of premature failure Loss of efficiency The exclusive use of Busch genuine spare parts and consumables is recomme...

Page 28: ...r is defective Replace the motor The machine does not reach the usual pressure on the suction connection Suction or discharge lines too long or section diameter too small Use larger diameter or shorte...

Page 29: ...temperature see Technical Data 30 Temperature of the process gases at the inlet too high Observe the permitted gas inlet temperature see Technical Data 30 Oil level too low Top up oil The oil is black...

Page 30: ...pressure Atmospheric pressure Cooling liquid Pressure of the network bar Min 1 5 Max 6 relative Cooling liquid pressure bar Max 6 Cooling liquid requirements See Operating Parameters 18 Oil capacity...

Page 31: ...cal and elec tronic equipment and following the standards Standard Title of the Standard EN ISO 12100 2010 Safety of machinery Basic concepts general principles of design EN ISO 13857 2008 Safety of m...

Page 32: ...ch co jp Korea www buschvacuum com kr busch busch co kr Malaysia www busch com my busch busch com my Mexico www buschvacuum com mx info busch com mx Netherlands www buschvacuum com nl info busch nl Ne...

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