Atlas Copco LE75 User Manual

Atlas Copco Stationary Air Compressors
*2920125704*
No. 2920 1257 04
Registration code: APC L / 38 / 989
Replaces 2920 1257 03
2000-10
LE/LT15, -22, -40, -55, -75, -110, -150
LF15, -22, -40, -55, -75
www.atlascopco.com
• Copyright 2000, Atlas Copco Airpower n.v., Antwerp, Belgium.
Any unauthorized use or copying of the contents or any part thereof is prohibited. This applies in
particular to trademarks, model denominations, part numbers and drawings.
• This instruction book meets the requirements for instructions specified by the machinery directive
98/37/EC and is valid for CE as well as non-CE labelled machines.
Instruction Book

Atlas Copco LE75 Specifications

General

Brand	Atlas Copco
Model	LE75
Category	Air Compressor
Language	English

Summary

Installation and Handling

Electrical Connections

Guidelines for electrical installation, including mains supply and protection.

Settings of Overload Relay, Fuses, and Cable Size

Specifications for overload relay settings, fuse ratings, and cable sizing for DOL and YD starters.

Operating Instructions

Initial Start-up

Procedures for the first-time startup of the compressor, including checks and settings.

Starting

Instructions for starting LE/LF/LT compressors and LE/LF/LT Trolley models.

Stopping

Procedures for safely stopping the compressor, including DOL and YD starter types.

Maintenance

Preventive Maintenance Schedule

Schedule outlining recommended maintenance tasks and intervals for the compressor.

Lubrication of LE/LT Compressors

Recommendations for using Atlas Copco approved PAO compressor oil for optimal performance.

Servicing and Adjustment Procedures

Adjustment MDR4 Pressure Switch

Instructions for adjusting the stopping and starting pressures of the MDR4 air pressure switch.

Adjustment MDR5/6 Pressure Switch

Instructions for adjusting the stopping and starting pressures of the MDR5/6 air pressure switch.

Safety Valve Testing

Procedure for testing the safety valve (SV) and its replacement if faulty.

Relief Valve on LF55/75, LE75 to -150 and LT

Problem Solving

Insufficient Air Pressure

Air Receiver Pressure Rises Above Maximum

Receiver Does Not Hold Pressure

Too Frequent Starting/Too Short Operating Periods

Unit Does Not Start

Troubleshooting guide for when the compressor unit fails to start.

Overload Relay Cuts Out