Atlas Copco LE55 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 LE55 Specifications

General

Free Air Delivery	32 cfm (900 l/min)
Motor Power	7.5 hp (5.5 kW)
Maximum Pressure	10 bar
Working Pressure	8 bar
Drive Type	Belt driven

Summary

Installation and Handling

Electrical Connections

Guidelines for safe and correct electrical wiring and connections.

Settings of Overload Relay, Fuses, and Cable Size

Recommended settings for electrical protection and cable sizing.

Operating Instructions

Initial Start-up

Step-by-step guide for the first operation of the compressor.

Starting

Procedures for starting the compressor, including DOL and Y/D starters.

Stopping

Instructions for safely shutting down the compressor.

Maintenance

Preventive Maintenance Schedule for the Compressor

Summary of scheduled maintenance tasks and intervals.

Lubrication of LE/LT Compressors

Guidance on approved compressor oil and lubrication procedures.

Servicing and Adjustment Procedures

Unloader or Check Valve

Valves

Air Filter

Adjustment MDR4 Pressure Switch

How to adjust the MDR4 pressure switch settings for stopping and starting.

Adjustment MDR5/6 Pressure Switch

Guide to adjusting the MDR5/6 pressure switch settings.

Adjustment Pilot Valve on Trolley

Safety Valve

Relief Valve

Problem Solving