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Atlas Copco GA 75+ User Manual

Atlas Copco GA 75+
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Water-cooled compressors
References Description
A Intake air
B Air/oil mixture
C Oil
D Wet compressed air
F Water flow
Description
The cooling system on water-cooled compressors comprises air cooler (Cwa) and oil cooler (Cwo).
They are connected to a cooling water circuit. The water flows through the inlet pipe, the coolers and the
outlet pipe.
Water-cooled air cooler and oil cooler
Instruction book
20 2920 7109 60

Table of Contents

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Atlas Copco GA 75+ Specifications

General IconGeneral
ModelGA 75+
CategoryAir Compressor
Power75 kW
Capacity FAD13.5 m³/min
Working Pressure7.5-13 bar
Noise Level70 dB(A)
Cooling SystemAir Cooled
Drive TypeDirect Drive

Summary

Safety Precautions

General Safety Precautions

Provides essential safety rules for operating and maintaining the compressor.

Safety Precautions During Installation

Outlines crucial safety measures to follow during the installation process of the compressor.

Safety Precautions During Operation

Details safety guidelines to ensure safe operation of the compressor.

Safety Precautions During Maintenance or Repair

Specifies safety measures for performing maintenance and repair work on the compressor.

Oil System

Cooling System

Regulating System

Elektronikon Regulator

Automatic Compressor Control

Explains how the regulator manages compressor loading and unloading.

Compressor Protection and Shutdown

Details how the regulator protects the compressor and initiates shutdowns.

Control Panel Detailed Description

A detailed breakdown of the Elektronikon controller's control panel and its elements.

Display Icons and Status

Explains various icons used on the Elektronikon display for status and functions.

Shut-down Warning

Details the conditions that trigger a shut-down warning on the compressor.

Compressor Shutdown

Explains the conditions and indicators for compressor shutdown.

Motor Overload Shutdown

Describes the process when the compressor motor experiences an overload.

Service Warning

Explains what triggers a service warning and how it is indicated.

Service Timer: Calling Up and Resetting

Guide to view and reset the service timer for maintenance intervals.

Local, Remote, or LAN Control Selection

How to select the compressor's control mode: local, remote, or network.

Pressure Band Settings: Calling Up and Modifying

Guide to view and adjust pressure band settings for compressor operation.

Modifying Pressure Band Selection

Steps to change the active pressure band for compressor control.

Service Timer Settings: Calling Up and Modifying

How to view and change service timer settings.

Activating Password Protection

How to set up password protection for compressor settings.

Protection Settings: Calling Up and Modifying

Guide to configure and modify compressor protection settings.

Programmable Settings

Unloading/Loading Pressures (No Dryer)

Table of programmable unloading and loading pressures for compressors without dryers.

Unloading/Loading Pressures (With Dryer)

Table of programmable pressures for compressors with built-in dryers.

Programmable Parameters

Lists programmable parameters like motor running time, stop time, etc.

Programmable Protections

Details programmable protection settings for temperature and other parameters.

Elektronikon Graphic Controller

Graphic Controller Control Panel

Identifies the components of the Elektronikon Graphic controller's control panel.

Automatic Compressor Operation Control

How the Graphic controller manages compressor operation automatically.

Graphic Controller Compressor Protection

How the Graphic controller protects the compressor and handles shutdowns.

Graphic Controller Shut-down Warnings

Explains shut-down warnings indicated by the Graphic controller.

Graphic Controller Service Warnings

Details service warnings from the Graphic controller.

Elektronikon Regulator Control Panel

Identifies parts and functions of the Elektronikon regulator control panel.

Status Icons

Explains icons related to compressor status and machine control modes.

Main Screen Control Panel

Identifies controls on the main screen interface.

Control Mode Selection

How to select the compressor's control mode: local, remote, or LAN.

Service Menu

Accessing service plans, checking service intervals, and modifying settings.

Service Plans and Modification

Details service plans and how to modify their intervals.

Setpoint Menu

Used to program and select active pressure bands for compressors.

Modifying General Settings

Guide to view and modify general settings like language, date, etc.

Week Timer Menu

Used to program time-based start/stop commands and week schemes.

Programming Week Schemes

Steps to create and configure weekly action schemes for the compressor.

Programming the Week Cycle

How to set up a 10-week cycle using programmed week schemes.

User Password Menu

How to manage user password protection for settings.

OSCi Condensate Treatment

OSCi Warnings: Service Required

Explains the warning for low filter lifetime and the need for service.

OSCi Overflow Warning

Describes the warning for a high water level in the OSCi and potential overflow.

OSCi Compressor Problems

Troubleshooting common issues with the compressor and OSCi, like oil leaks or overload.

OSCi Water Level and Airflow Issues

Troubleshooting high water levels, air supply problems, and test procedures for the OSCi.

Energy Recovery Unit (Optional)

ER Unit Maintenance

Procedures for oil change and maintenance of bypass valves and heat exchangers.

Installation

Installation Description and Requirements

Details installation requirements, ventilation, air delivery pipe, drain pipes, and control module.

Electrical Connections

Electrical Connections Overview

Guides on making electrical connections, including important remarks.

Electrical Connection Instructions and Status

Step-by-step instructions for electrical connections and compressor status indications.

Compressor Control Modes

Explains the available control modes: local, remote, and LAN.

Operating Instructions

Initial Start-Up Safety and Preparations

Safety precautions and preparatory steps before the initial start-up.

Electrical Connections and Initial Checks

Checks for electrical connections, transformer, overload relay, and circuit breakers.

Initial Start-Up Procedure

Detailed steps for starting the compressor for the first time or after a long period.

Starting the Compressor

Procedure for starting the compressor, including voltage checks and cooling water regulation.

Maintenance

Preventive Maintenance Schedule Overview

Outlines the regular maintenance schedule based on periods and hours.

Maintenance Checklist and Intervals

Details daily, monthly, 3-monthly, and yearly maintenance tasks.

Oil and Oil Filter Change Procedure

Detailed steps for draining oil, changing the oil filter, and refilling.

Problem Solving

Compressor Faults and Remedies

Troubleshooting common compressor issues like motor overload or failure to start.

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