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BUSCH R5 RB 0021 C - User Manual

BUSCH R5 RB 0021 C
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R5
Rotary Vane Vacuum Pumps
RB 0021 C
RC 0021 C
Instruction Manual
0870146978 | B0003_en-US | Original instructions 6/23/2022

Questions and Answers

  • M
    Molly RileyAug 12, 2025
    How to troubleshoot a BUSCH Water Pump that won't start?
    • C
      Cheryl ConnerAug 13, 2025
      If your BUSCH Water Pump isn't starting, the issue might stem from a few causes. First, the motor might not be getting the correct voltage, so check the power supply. Alternatively, the motor itself could be defective and need replacement. Lastly, a defective coupling (CPL) could be the culprit, requiring you to replace the coupling (CPL).
  • J
    Joel MoyerAug 16, 2025
    Why is my BUSCH R5 RB 0021 C Water Pump running too hot?
    • J
      Jack KingAug 16, 2025
      Several factors can cause your BUSCH Water Pump to overheat. Insufficient cooling could be the issue, so remove any dust and dirt from the machine. Also, ensure that the ambient temperature is within the permitted range. Low oil level can also lead to overheating, so top up the oil. Finally, partially clogged exhaust filters (EF) can cause the machine to run hot, so replace the exhaust filters (EF).
  • O
    omontgomeryAug 20, 2025
    What to do if BUSCH R5 RB 0021 C doesn't reach usual pressure?
    • C
      Catherine EscobarAug 20, 2025
      If your BUSCH Water Pump isn't reaching its usual suction pressure, several things could be wrong. Start by checking the oil level and topping it up if it's low. The inlet screen (IS) might be partially clogged, so clean it. If your pump has an optional inlet filter cartridge, it might be clogged and need replacement. Internal parts may be worn or damaged.
  • T
    Travis CarterAug 25, 2025
    Why is my BUSCH R5 RB 0021 C Water Pump so noisy?
    • L
      Lacey BrownAug 25, 2025
      A noisy BUSCH Water Pump can be caused by a few things. The coupling (CPL) might be worn and need replacement. Stuck vanes or defective bearings may also be the cause.
  • D
    daniellewilsonAug 27, 2025
    Why is my BUSCH R5 RB 0021 C fuming or expelling oil?
    • J
      Joyce JohnsonAug 27, 2025
      If your BUSCH Water Pump is fuming or expelling oil droplets, it could be due to partially clogged exhaust filters (EF), so replace them. Another cause might be an exhaust filter (EF) with o-ring that is not fitted properly, so ensure the correct position of the exhaust filters (EF) and the o-rings. If you have a version with an oil return valve and the machine runs for more than 2 hours without interruption, regularly shut down the machine for short periods of time.
  • M
    Mr. Richard BrownAug 31, 2025
    What causes abnormal oil consumption in a BUSCH R5 RB 0021 C?
    • K
      kathycaldwellAug 31, 2025
      Abnormal oil consumption in your BUSCH Water Pump can be attributed to a couple of factors. Oil leaks may be present. Also, operating the machine at atmospheric pressure for extended periods can lead to increased oil consumption, so make sure that the machine operates under vacuum.
  • R
    Robin HughesSep 4, 2025
    Why is the oil in my BUSCH Water Pump black?
    • P
      parkergregorySep 4, 2025
      Black oil in your BUSCH Water Pump can indicate a few issues. The oil change intervals might be too long. The inlet filter (optional) could be defective and need replacement. The machine may be running too hot.
  • M
    Mary SosaSep 8, 2025
    What causes emulsified oil in my BUSCH R5 RB 0021 C?
    • N
      Nicholas MitchellSep 8, 2025
      If the oil in your BUSCH Water Pump is emulsified, it could be because the machine sucked in liquids or significant amounts of vapor. Clean the filter of the gas ballast valve (GB). Modify the operational mode.

Summary

Safety Precautions

Imminent Danger Notification

Indicates an imminent dangerous situation that will result in death or serious injuries if not prevented.

Potential Danger Warning

Indicates a potentially dangerous situation that could result in death or serious injuries.

Minor Injury Caution

Indicates a potentially dangerous situation that could result in minor injuries.

Property Damage Notice

Indicates a potentially dangerous situation that could result in damage to property.

Operational Tips Note

Provides helpful tips and recommendations for efficient and trouble-free operation.

Product Description

Vacuum Pump Component Identification

Identifies key components of the vacuum pump with labels and a description table.

Rotary Vane Operating Principle

Explains the machine works on the rotary vane principle, sealing gaps and removing heat.

Intended Use Warning

Warns against foreseeable misuse outside intended use, highlighting risks of injuries and damages.

Machine Start Control Information

Machine comes without start controls; control is provided during installation.

Optional Accessories Overview

Details optional accessories like Gas Ballast Valve, Inlet Filter, and Filter Pressure Gauge.

Transport Guidelines

Suspended Load Safety Precautions

Warns about suspended load risks and emphasizes severe injury prevention.

Transport Oil Management Notice

Advises on preventing oil ingress into the cylinder when transporting a filled machine.

Lifting Method Instructions

Provides instructions for lifting the machine using a sling or transport lug.

Storage Recommendations

Machine Storage Procedures

Recommends sealing apertures, using corrosion film for long-term storage, and storing indoors.

Installation Procedures

Installation Conditions and Requirements

Ensures non-explosive environment, adequate venting, unobstructed cooling, and proper mounting.

Connecting Lines and Pipes

Remove protective covers, ensure lines don't stress connections, use adequate line size.

Suction Connection Safety

Notice regarding foreign object ingress and installation of an upstream filter.

Discharge Connection Safety

Caution about oil in discharge gas and notice on ensuring unobstructed discharge flow.

Oil Filling Procedure

Notice about using inappropriate oil, risk of premature failure/loss of efficiency. Use approved oil.

Electrical Connection and Safety

Live Wire Electrical Hazard

Danger of electrical shock from live wires; installation by qualified personnel only.

Missing Current Protection Hazard

Danger of electrical shock due to missing current protection.

Electromagnetic Compatibility (EMC)

Notice regarding electromagnetic compatibility requirements.

Installation Without Control Box or VSD

Danger of electrical shock; ensure power supply compatibility and protective devices.

Incorrect Connection Warning

Notice about incorrect connection, risk of motor damage.

Single-Phase Motor Wiring Diagram

Provides wiring diagram and color coding for single-phase motors.

Three-Phase Motor Wiring and Rotation

Notice on incorrect rotation risk and wiring diagrams for three-phase motors.

Commissioning Procedures

Operation Without Oil Warning

Notice that operation without oil will ruin the machine; fill with oil before commissioning.

Surface Temperature Caution

Caution regarding high surface temperatures and risk of burns.

Noise Level Caution

Caution regarding noise levels and risk of hearing damage.

Operation with Oil Return Valve

Describes oil accumulation in the upper chamber of the oil separator for this version.

Procedure for Condensable Vapors

Details the procedure for conveying condensable vapors, including isolation valve operation.

Maintenance Safety and Procedures

Electrical Maintenance Hazard

Danger of electrical shock from live wires; maintenance by qualified personnel only.

Hazardous Material Contamination Warning

Warning about hazardous material contamination, risk of poisoning and infection.

Hot Surface Maintenance Caution

Caution regarding hot surfaces and risk of burns during maintenance.

Maintenance Risk and Efficiency Warning

Caution about improper maintenance leading to injuries, failure, and loss of efficiency.

Inappropriate Cleaner Usage Notice

Notice about using inappropriate cleaners and risk of damage to labels and paint.

Maintenance Schedule Overview

Details maintenance intervals for normal and harsh applications, including oil and filter changes.

Oil Level Inspection Procedure

Procedure for checking the oil level, including waiting time after shutdown.

Oil Change Procedure and Warnings

Notice about using inappropriate oil, risking premature failure and loss of efficiency.

Exhaust Filter Change Procedure

Provides detailed instructions and illustrations for changing the exhaust filter.

Overhaul Procedures

Hazardous Material Overhaul Warning

Warns about hazardous material contamination during overhaul, risking poisoning and infection.

Improper Assembly Risk

Notice regarding risks associated with improper assembly during overhaul.

Decommissioning and Disposal

Electrical Decommissioning Hazard

Danger of electrical shock from live wires; work by qualified personnel only.

Hot Surface Decommissioning Caution

Caution regarding hot surfaces and risk of burns during decommissioning.

Dismantling and Disposal Steps

Outlines steps for dismantling, including oil draining, filter removal, and proper disposal.

Spare Parts Information

Genuine Spare Parts Recommendation

Recommends using genuine parts to prevent failure and maintain efficiency.

Troubleshooting Guide

Electrical Troubleshooting Hazard

Danger of electrical shock from live wires; installation by qualified personnel only.

Hot Surface Troubleshooting Caution

Caution regarding hot surfaces and risk of burns during troubleshooting.

Machine Fails to Start Troubleshooting

Provides troubleshooting steps for when the machine does not start.

Failure to Reach Pressure Troubleshooting

Troubleshooting steps for when the machine fails to reach normal suction pressure.

Excessive Noise Troubleshooting

Troubleshooting steps for excessive noise during operation.

Overheating Problem Troubleshooting

Troubleshooting steps for overheating issues.

Oil in Discharge Gas Troubleshooting

Troubleshooting steps for oil expulsion in discharge gas.

Abnormal Oil Consumption Troubleshooting

Troubleshooting steps for abnormal oil consumption.

Black Oil Indication Troubleshooting

Troubleshooting for black oil, indicating potential need for oil change.

Emulsified Oil Indication Troubleshooting

Troubleshooting for emulsified oil, possibly due to moisture ingress.

Technical Data

Oil Recommendations

Recommended Vacuum Pump Oils

Details recommended oil types, part numbers, and their specific applications.

EU Declaration of Conformity

UK Declaration of Conformity

BUSCH R5 RB 0021 C Specifications

General IconGeneral
BrandBUSCH
ModelR5 RB 0021 C
CategoryWater Pump
LanguageEnglish

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