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BUSCH R5 RC 0021 C - User Manual

BUSCH R5 RC 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

  • J
    Jordan GutierrezAug 17, 2025
    How to troubleshoot a BUSCH R5 RC 0021 C that won't start?
    • R
      robertnelsonAug 17, 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).
  • R
    Raymond StewartAug 20, 2025
    Why is my BUSCH R5 RC 0021 C Water Pump running too hot?
    • J
      Jessica HughesAug 20, 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).
  • R
    Ronald StanleyAug 22, 2025
    What to do if BUSCH R5 RC 0021 C Water Pump doesn't reach usual pressure?
    • C
      Christopher LongAug 22, 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.
  • J
    judy38Aug 25, 2025
    Why is my BUSCH R5 RC 0021 C Water Pump so noisy?
    • C
      Cristian SpearsAug 26, 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.
  • P
    pshawAug 27, 2025
    Why is my BUSCH Water Pump fuming or expelling oil?
    • J
      jennifercomptonAug 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.
  • J
    Jennifer StokesAug 30, 2025
    What causes abnormal oil consumption in a BUSCH Water Pump?
    • M
      Mark JacksonAug 30, 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.
  • M
    matthew64Sep 1, 2025
    Why is the oil in my BUSCH Water Pump black?
    • H
      hannahgarrettSep 1, 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.
  • J
    joannacunninghamSep 4, 2025
    What causes emulsified oil in my BUSCH R5 RC 0021 C?
    • R
      Ronald WrightSep 4, 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.
  • J
    justin80Sep 6, 2025
    What to do if my BUSCH R5 RC 0021 C is running too hot?
    • J
      Jason HallSep 7, 2025
      If your BUSCH Water Pump is running too hot, it may be due to insufficient cooling. Remove any dust and dirt from the machine. Also, check the cooling fan, top up the oil, and replace the exhaust filters (EF).
  • E
    Edward WhiteSep 9, 2025
    Why is my BUSCH Water Pump machine not reaching usual pressure?
    • A
      Alexander TaylorSep 9, 2025
      If your BUSCH Water Pump isn't reaching the usual pressure, the oil level might be too low, so top up the oil. Also, clean the inlet screen (IS) and replace the inlet filter cartridge. If problems persist, contact Busch to repair the machine.

Summary

Safety

DANGER

Indicates an imminent dangerous situation resulting in death or serious injury if not prevented.

WARNING

Indicates a potentially dangerous situation resulting in death or serious injury.

CAUTION

Indicates a potentially dangerous situation resulting in minor injuries.

NOTICE

Indicates a potentially dangerous situation resulting in damage to property.

NOTE

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

Product Description

Operating Principle

Explains the rotary vane principle of the machine, including oil sealing, lubrication, and heat dissipation.

Intended Use

Specifies the machine is for industrial use, intended for dry, non-aggressive gases, and non-explosive environments.

Start Controls

Details that the machine lacks start controls and can be fitted with a soft-starter.

Optional Accessories

Lists and describes optional accessories like Gas Ballast Valve, Inlet Filter, and Filter pressure gauge.

Transport

WARNING

Warns of severe injury risk from suspended loads, advising against standing or working underneath them.

NOTICE

Advises draining oil before transport or horizontal transport to prevent oil ingress and machine damage.

Storage

Installation

Installation Conditions

Specifies installation requirements: non-explosive environment, adequate ventilation, horizontal mounting (max 1° tilt).

Connecting Lines; Pipes

Guidance on connecting lines, ensuring size compatibility and avoiding stress on connections.

Suction Connection

Details suction connection, recommending upstream filters for dust and specifying connection size G1/2.

Discharge Connection

Covers discharge connection, warning about oil in gas and obstruction, advising on line slope or liquid separators.

Filling Oil

Instructs on using approved oil and shows the procedure for filling oil into the machine.

Electrical Connection

DANGER

Warns about live wires and electrical shock risk, stating installation must be by qualified personnel.

CURRENT PROTECTION OF THE CUSTOMER INSTALLATION

Highlights missing current protection and electrical shock risk, requiring compliance with EN 60204-1 and standards.

NOTICE

Addresses electromagnetic compatibility, advising on motor immunity and EMC compliance with network systems.

Machine delivered without Control Box or Variable Speed Drive (VSD)

Details electrical connection for machines without control box/VSD, warning of live wires and requiring qualified personnel.

Wiring Diagram Single-Phase Motor

Wiring Diagram Three-Phase Motor

Commissioning

NOTICE

Emphasizes the need to fill the machine with oil before commissioning to prevent damage.

CAUTION

Warns about hot surfaces (over 70°C) and risk of burns, advising to avoid contact during/after operation.

Noise of running machine

Alerts to noise risk and potential hearing damage, recommending ear protection for prolonged exposure.

Version with Oil Return Valve

Describes operation with an oil return valve, noting oil accumulation and required shutdown periods.

Conveying Condensable Vapors

Maintenance

DANGER

Warns about live wires and electrical shock risk, stating maintenance must be by qualified personnel.

WARNING

Alerts to hazardous material contamination, risk of poisoning/infection, and the need for appropriate PPE.

CAUTION

Warns about hot surfaces and risk of burns, advising to let the machine cool before touching.

Failing to properly maintain the machine

Highlights risks from improper maintenance (injuries, failure, loss of efficiency), requiring qualified personnel.

NOTICE

Advises against using inappropriate cleaners and lists shutdown/venting procedures before maintenance.

Maintenance Schedule

Oil Level Inspection

Oil Change

Exhaust Filter Change

Overhaul

WARNING

Warns about hazardous material contamination, risk of poisoning/infection, and the need for appropriate PPE.

NOTICE

Addresses improper assembly risks and states dismantling beyond manual scope requires authorized technicians.

Decommissioning

DANGER

Warns about live wires and electrical shock risk, stating work must be by qualified personnel.

CAUTION

Warns about hot surfaces and risk of burns, advising to let the machine cool before touching.

Dismantling and Disposal

Provides steps for dismantling and disposal, including draining oil, removing filters, and waste separation.

Spare Parts

NOTICE

Recommends using genuine Busch parts for correct function and warranty validation.

Troubleshooting

DANGER

Warns about live wires and electrical shock risk, stating installation must be by qualified personnel.

CAUTION

Warns about hot surfaces and risk of burns, advising to let the machine cool before touching.

Machine Does Not Start

Lists possible causes and remedies for the machine failing to start.

Performance Issues

Covers problems like low pressure, overheating, and noisy operation.

Discharge and Oil Issues

Addresses oil discharge, abnormal consumption, black or emulsified oil.

Technical Data

Oil

EU Declaration of Conformity

UK Declaration of Conformity

BUSCH R5 RC 0021 C Specifications

General IconGeneral
BrandBUSCH
ModelR5 RC 0021 C
CategoryWater Pump
LanguageEnglish

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