Atlas Copco LE22

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 LE22 Specifications

General

Brand	Atlas Copco
Model	LE22
Category	Air Compressor
Language	English

Summary

2 Installation and handling

2.3 Electrical connections

Outlines requirements for electrical installation, including mains supply, earthing, and local codes.

2.4 Settings of overload relay - fuses - cable size

Specifies settings for overload relays, fuse ratings, and appropriate cable sizes for compressor starters.

3 Operating instructions

3.1 Initial start-up

Guides through initial setup, oil checks, voltage connection, and motor rotation verification for new compressors.

3.2 Starting

Details the step-by-step process for starting LE/LF/LT compressors, including oil level and pressure switch checks.

3.3 Stopping

Explains the correct procedures for safely stopping the compressor, including using pressure switches and outlet valves.

4 Maintenance

4.2 Preventive maintenance schedule for the compressor 1)

Summarizes the recommended preventive maintenance schedule, including intervals and tasks based on running hours.

4.3 Lubrication of LELT compressors

5 Servicing and adjustment procedures

5.1 Unloader or check valve

5.2 Valves

5.3 Air filter

Details the procedure for inspecting, cleaning, and replacing the air filter element on various compressor models.

5.4 Adjustment MDR4 pressure switch

Explains how to adjust the MDR4 pressure switch to control maximum and starting pressures, including caution notes.

5.5 Adjustment MDR56 pressure switch

Details the procedure for adjusting the MDR5/6 pressure switch, controlling maximum and pressure difference settings.

5.6 Adjustment pilot valve on Trolley

Describes the adjustment of the pilot valve on Trolley units for controlling maximum pressure and unloading.

5.7 Safety valve (SV-Figs. 1.4, 1.5 and 1.8) 1)

Advises on replacing the safety valve if it does not open at the correct pressure; no adjustments allowed.

5.8 Relief valve (8-Fig. 1.1) on LF5575, LE75 up to -150 and LT

6 Problem solving

1 Insufficient air pressure

6 Too frequent startingtoo short operating periods

8 Unit does not start

Guides on diagnosing electrical failures, overload relay trips, or pressure issues preventing unit start-up.

9 Overload relay cuts out

Covers troubleshooting for overload relay trips, including checking settings, solenoid valves, and ambient temperature.

7 Principal data

7.3 Compressor data for LE 10 bar

7.4 Compressor data for LF 10 bar

7.5 Compressor data for LT 15 bar

7.6 Compressor data for LT 20 bar

7.7 Compressor data for LT 30 bar