BUSCH RA 0255 D User Manual

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Instruction Manual

R5 ATEX

Oil-Lubricated Rotary Vane Vacuum Pumps

RA 0165 D, RA 0205 D, RA 0255 D, RA 0305 D

0870570604/-0011_en / Original instructions / Modifications reserved 12/03/2021

Ateliers Busch S.A.

Zone industrielle, 2906 Chevenez

Switzerland

Table of Contents

Other manuals for BUSCH RA 0255 D

Instruction Manual Supplement12 pages

Installation And Operating Instructions28 pages

Questions and Answers:

J
Julie CarpenterSep 7, 2025
What to do if my BUSCH RA 0255 D runs too hot?
- J
  Joseph PeckSep 7, 2025
  If your BUSCH Water Pump is running too hot, several factors could be the cause. Insufficient cooling may be the issue, so remove any dust and dirt from the machine. Also, the ambient temperature might be too high, so observe the permitted ambient temperature. Low oil level can also cause overheating, so top up the oil. Lastly, partially clogged exhaust filters (EF) could be the problem, in which case replace the exhaust filters (EF).
R
Richard KingAug 23, 2025
Why is the oil in my BUSCH RA 0255 D emulsified?
- N
  Nathaniel FrankAug 25, 2025
  If the oil in your BUSCH Water Pump is emulsified, it might be because the machine sucked in liquids or significant amounts of vapor, in which case you should contact Busch to flush the machine. Also, clean the filter of the gas ballast valve (GB). Consider modifying the operational mode.
V
Vincent BatesAug 25, 2025
Why BUSCH RA 0255 D Water Pump fumes or expels oil?
- D
  david16Aug 25, 2025
  If your BUSCH Water Pump is fuming or expelling oil droplets, it could be due to: partially clogged exhaust filters (EF) – replace them; an exhaust filter (EF) with o-ring not fitted properly – ensure correct positioning; or a malfunctioning float valve (FV) – contact Busch for repair.
M
martinezadamAug 26, 2025
Why BUSCH RA 0255 D has abnormal oil consumption?
- L
  Lauren HamptonAug 27, 2025
  Abnormal oil consumption in your BUSCH Water Pump can stem from a few issues: oil leaks (contact Busch to replace seals), a malfunctioning float valve (FV) (contact Busch to check and repair the float valve and oil return line), or running the machine at atmospheric pressure for an extended period (ensure the machine operates under vacuum).
C
Christopher LutzAug 27, 2025
What does it mean if the oil in my BUSCH Water Pump is emulsified?
- O
  owoodAug 27, 2025
  If the oil in your BUSCH Water Pump is emulsified, it's likely that the machine has sucked in liquids or significant amounts of vapor.
N
Nancy EllisAug 29, 2025
What to do if my BUSCH RA 0255 D Water Pump does not start?
- T
  tommyjoyceAug 29, 2025
  If your BUSCH Water Pump doesn't start, it could be due to several reasons. First, check if the motor is receiving the correct voltage. If the voltage is correct, the motor might be defective and need replacement. Another possible cause is a defective coupling (CPL), which would also require replacement.
S
Steven GraySep 13, 2025
Why BUSCH RA 0255 D does not start?
- S
  Steven MartinSep 13, 2025
  Your BUSCH Water Pump might not start due to several reasons: the motor may not be receiving the correct voltage (check the voltage), the motor itself could be defective (replace the motor), or the coupling (CPL) might be defective (replace the coupling).
S
Stephanie CruzSep 8, 2025
Why BUSCH Water Pump does not reach the usual pressure?
- M
  Michael PruittSep 8, 2025
  If your BUSCH Water Pump isn't reaching the usual pressure on the suction connection, check these potential causes: The oil level might be too low, so top up the oil. The inlet screen (IS) could be partially clogged, so clean the inlet screen (IS). If your pump has an inlet filter cartridge (optional), it might be clogged, so replace the inlet filter cartridge. If none of these resolve the issue, internal parts may be worn or damaged, so repair the machine or contact Busch.
B
brenda94Sep 5, 2025
Why my BUSCH RA 0255 D Water Pump does not start?
- A
  angela10Sep 5, 2025
  If your BUSCH Water Pump doesn't start, it could be due to several reasons. First, the motor might not be getting the correct voltage, in this case check the power. Alternatively, the motor itself could be defective and need replacement. Finally, a defective coupling (CPL) could also be the culprit, so replace the coupling (CPL).
L
Lori KennedySep 3, 2025
Why is my BUSCH Water Pump running very noisily?
- A
  Angela YoungSep 3, 2025
  If your BUSCH Water Pump is operating with excessive noise, it could be due to a worn coupling (CPL), which would need replacement. Alternatively, stuck vanes or defective bearings might be the cause, in which case you should contact Busch for machine repair.

BUSCH RA 0255 D Specifications

General

Brand	BUSCH
Model	RA 0255 D
Category	Water Pump
Language	English

Summary

Safety

Product Description

2.1 Operating Principle

2.5 Explanation of ATEX Classification

Details ATEX marking components and their meaning for explosive atmospheres.

2.6 Safety concept

Outlines the safety strategy focusing on preventing sparks and excessive temperatures.

2.6.1 ATEX Classifications and Associated Accessories

Defines required accessories based on specific ATEX classification types.

Installation

5.1 Installation Conditions

Specifies environmental and physical requirements for safe machine installation.

5.2 Connecting Lines / Pipes

5.3 Earth Connection

5.6 Electrical Connection

Covers electrical installation, safety, and connection of the motor.

5.7 Electrical Connection of the Monitoring Devices

Explains the connection of monitoring sensors like temperature and pressure switches.

5.8 Flowchart

Commissioning

Maintenance

7.1 Maintenance Schedule

7.3 Oil and Oil Filter Change

Overhaul

Decommissioning

Troubleshooting

Technical Data

Oil

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