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Oil-Lubricated Rotary Vane Vacuum Pumps RA 0400 C, RA 0502 C, RA 0630 C RC 0400 C, RC 0502 C, RC 0630 C US Version Busch Manufacturing LLC 516 Viking Drive Virginia Beach, VA 23452 0870207738/-_en / Original instructions / Modifications reserved...
Safety | 1 Safety Before installing and operating the vacuum pump, this instruction manual should be read and understood. If anything needs to be clarified please contact your Busch representa- tive. Read carefully before use and keep for future reference.
2 | Product Description Product Description OFP, EPG RA 0502 C / RA 0630 C RA 0502 C / RA 0630 C RA 0400 C Air-oil heat exchanger Baffle filter Directional arrow Eye bolt Exhaust filter Exhaust pressure gauge Float valve (on RA version only) Gas ballast valve (standard on RA) Suction connection Level switch...
Conveying of other media leads to an increased thermal and/or mechanical load on the vacuum pump and is permissible only after a consultation with Busch. The vacuum pump is intended for the placement in a non-hazardous environment.
3 | Transport 2.4.4 Level Switch (accessory) The level switch monitors the oil level in the oil separator (OS). The vacuum pump must be stopped when the oil level is too low. 2.4.5 Gas Ballast Valve (option) The gas ballast mixes the process gas with a limited quantity of ambient air to counteract the condensation of vapor inside the vacuum pump.
Storage | 4 WARNING Motor eye bolt. Risk of severe injury! • Do not lift the vacuum pump using the eye bolt fitted to the motor. Only lift the vac- uum pump as previously shown. • Check the vacuum pump for transport damage. If the vacuum pump is secured to a shipping base: •...
Water Connection (Optional). If the vacuum pump is installed at an altitude greater than 3300 feet above sea level: • Contact your Busch representative, the motor should be derated or the ambient temperature limited. If the vacuum pump is equipped with monitoring devices or sensors: •...
If the vacuum pump is used as part of a vacuum system: • Busch recommends the installation of an isolation valve in order to prevent the oil from flowing back to the vacuum system. • Do not use the anti-suck-back valve as a system check valve.
The water cooling option can be used to cool pumps operating in high ambient tempera- tures, or it can be used to maintain a pump at elevated temperatures to prevent conden- sation inside the pump in wet applications. • Contact your Busch representative for more details. 10 / 32 0870207738_RA_RC0400-0630C_USA_-_IM_en...
Do not use 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 [► 27] and Oil [► 27]. Check oil level 0870207738_RA_RC0400-0630C_USA_-_IM_en...
• Make sure that the motor of the vacuum pump will not be affected by electric or elec- tromagnetic disturbance from the mains; if necessary seek advice from Busch. • Ensure the electrical connection is properly grounded. • Electrically connect the motor.
Commissioning | 6 5.4.1 Wiring Diagram Three-Phase Motor The wiring diagram for the electrical connection is located in the terminal box or on the nameplate of the motor. If the pump is supplied with a motor starter, it is preset at the factory in accordance with the supplied motor.
6.1 Conveying Condensable Vapours Water vapour within the gas flow is tolerated within certain limits. The conveyance of other vapours shall be agreed upon with Busch. If condensable vapours are to be conveyed: Warm the pump up for 30 minutes before exposing it to the process, and allow it to run dry for 30 minutes before turning it off.
Failing to properly maintain the machine. Risk of premature failure! Loss of efficiency! • Respect the maintenance intervals or ask your Busch representative for service. • Shut down the vacuum pump and lock against inadvertent start up. • Vent the connected lines to atmospheric pressure.
• Check and/or clean the water cooling sys- tem. • Contact Busch for an inspection. Every 5 years If required, overhaul the machine. * Service interval for synthetic oil, shorten the interval when using mineral oil, contact Busch Service 7.2 Oil Level Inspection...
Do not use inappropriate oil. Risk of premature failure! Loss of efficiency! • Only use an oil type which has previously been approved and recommended by Busch. NOTICE Do not fill oil through the vacuum pump inlet. Risk of damage to the vacuum pump! Starting the vacuum pump with excessive quantities of oil in the cylinder will break the vanes.
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7 | Maintenance Busch genuine spare parts 1x oil filter (OF), part no.: 0531 000 005 Oil filter wrench For oil type and oil capacity see Technical Data [► 27] and Oil [► 27]. Check oil level CAUTION Oil fill plug not tight enough.
Maintenance | 7 WARNING The vacuum pump is underfilled with oil. Risk of fire! • Insufficient oil quantity in the vacuum pump has the potential, under certain condi- tions, to lead to self-ignition of the remaining oil in the vacuum pump. WARNING Degraded oil build up in oil lines.
Risk of premature failure! Loss of efficiency! • It is highly recommended that any dismantling of the vacuum pump beyond what is described in this manual should be done through Busch. WARNING Vacuum pumps contaminated with hazardous material. Risk of poisoning!
• Decontaminate the vacuum pump as well as possible and state the contamination status in a ‘Declaration of Contamination’. Busch will only accept vacuum pumps that come with a complete filled in and legally binding signed ‘Declaration of Contamination’. Decommissioning •...
11 | Troubleshooting 11 Troubleshooting 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 touching the vacuum pump, let the vacuum pump cool down. The vacuum pump appearance may differ from the illustration * On RA version only 22 / 32...
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Busch recommended vacuum oil. The exhaust filter is clogged • Contact Busch for process due to process material recommendations Loose connection in motor • Check motor wiring dia- terminal box; not all motor gram for proper hookup, coils are properly connected.
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Check and retighten oil tubing fittings (contact Busch service). The shaft seal is leaking. • Contact Busch service. Vanes are blocked in the ro- • Contact Busch service. tor or they are damaged. The radial clearance be- • Contact Busch service.
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Liquid carryover into the • Contact Busch service. In- cylinder broke vanes while stall liquid separator on the pump was running the inlet of the vacuum pump.
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11 | Troubleshooting The oil is emulsified. The vacuum pump sucked in • Flush the vacuum pump liquids or significant (contact Busch). amounts of vapour. • Clean the filter of the gas ballast valve (GB). • Modify the operational mode (see Conveying Condensable Vapours [► 14]).
Technical Data | 12 12 Technical Data RA 0400 C RA 0502 C RA 0630 C RC 0400 C RC 0502 C RC 0630 C Nominal pumping speed ACFM Ultimate pressure Torr abs. For RA version: 0.075 … 0.375 ► see nameplate (NP) (without gas ballast valve) For RC version: 15 Ultimate pressure...
14 EU Declaration of Conformity This Declaration of Conformity and the CE-mark affixed to the nameplate are valid for the vacuum pump within the Busch scope of delivery. This Declaration of Conformity is issued under the sole responsibility of the manufac- turer.
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