Atlas Copco LT20/30

Instruction book
Atlas Copco Stationary Air Compressors
LE2, -3, -5, -7, -10, -15, -20
LT2, -3, -5, -7, -10 (50 Hz)
LT15/60, -15-30, -15, -20, -20-30
LF2, -3, -5, -7, -10
Instruction book
Copyright 2004, 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.
No. 2920 1585 00
Registration code: APC L / 38 / 985
2004-07
2920 1585 00 - 1 -

Atlas Copco LT20/30 Specifications

General

Brand	Atlas Copco
Model	LT20/30
Category	Air Compressor
Language	English

Summary

Leading Particulars

General Description

Overview of compressor types, construction, and primary features.

Regulating System

Describes the operational control system based on pressure and starting methods.

Installation and Handling

Installation Proposals

Recommendations for optimal placement, ventilation, and environmental conditions for installation.

Electrical Connections

Instructions for safe and correct electrical wiring and hook-up procedures.

Overload Relay, Fuses, and Cable Size

Guidance on selecting and setting electrical protection components like fuses and relays.

Operating Instructions

Initial Start-up

Steps for the first-time operation, including checks and initial setup.

Starting

Stopping

Maintenance

Preventive Maintenance Schedule

A schedule outlining regular checks and replacements to ensure optimal performance.

Lubrication of LELT Compressors

Servicing and Adjustment Procedures

Unloader or Check Valve

Valves

Adjustment of MDR4 S Pressure Switch

Adjustment of MDR3 Pressure Switch

Adjustment of Pilot Valve on Trolley

Safety Valve Testing

Relief Valve

Problem Solving

Insufficient Air Pressure

Troubleshooting common causes and solutions for low air output.

Unit Does Not Speed Up

Air Receiver Pressure Rises Above Maximum

Relief Valve Blows

Receiver Does Not Hold Pressure

Too Frequent StartingToo Short Operating Periods

High Oil Consumption

Unit Does Not Start

Diagnostic steps for failures preventing the compressor unit from starting.

Overload Relay Cuts Out

Explains why the overload relay may trip and how to reset or address the issue.

Principal Data

LE Compressor Data

LF Compressor Data

LT 15 Bar Compressor Data

LT 20 Bar Compressor Data

LT 30 Bar Compressor Data

Safety Precautions

General Safety Rules

Fundamental safety guidelines for operating and maintaining the compressor.

Installation Directives

Specific safety requirements and recommendations for proper unit installation.

Operation Precautions

Critical safety measures to ensure safe operation and prevent hazards.

Maintenance Precautions

Essential safety guidelines to follow during all maintenance and repair activities.

Refrigerant Handling