Atlas Copco GA90/160 A Cooler Kit Replacement – 2906097400

The 2906097400 Cooler Kit is a service/replacement kit used for the cooling system of applicable GA90/160 A compressors. The cooler removes heat generated during compression and helps maintain the compressor’s operating temperature within the required range.

During compressor operation, hot compressed air and/or compressor oil passes through the relevant cooler circuit. Heat is transferred through the cooler to the cooling air, allowing the system to maintain suitable operating temperatures. A parts list for the GA110 identifies 2906 0974 00 as the GA90/160 (A) cooler kit.

Working Process

1. Compression – Air is compressed in the compressor element, generating heat.
2. Hot-Air/Oil Flow – The heated medium flows toward the cooler.
3. Heat Transfer – Heat passes through the cooler’s heat-transfer surfaces.
4. Cooling-Air Flow – Ambient cooling air removes heat from the cooler.
5. Temperature Reduction – The temperature of the compressed air/oil circuit is reduced.
6. Controlled Operation – The cooled medium returns to the appropriate compressor circuit.
7. Continuous Cooling – This process continues while the compressor operates.

Main Functions

• Removes excess heat from the compressor system.
• Maintains appropriate operating temperature.
• Supports compressor efficiency.
• Helps prevent overheating.
• Supports stable oil temperature.
• Maintains reliable compressor operation.
• Provides replacement/service components for the cooler assembly.

Possible Failure Symptoms

A contaminated, damaged or leaking cooler can result in:

• High compressor temperature.
• High oil temperature.
• Reduced cooling efficiency.
• Increased energy consumption.
• Temperature alarms.
• Compressor thermal shutdown.
• Oil or air leakage.
• Reduced compressor performance.

Maintenance Procedure

1. Shut down the compressor following the applicable Atlas Copco service procedure.
2. Isolate the electrical supply.
3. Fully depressurize the compressor.
4. Allow the compressor and cooler to cool.
5. Isolate the applicable oil/air circuit.
6. Remove the cooler and required service components.
7. Inspect the cooler for contamination, corrosion and leakage.
8. Clean the heat-transfer surfaces where appropriate.
9. Replace the applicable service components using 2906097400.
10. Ensure all seals and connections are correctly positioned.
11. Reassemble the cooler.
12. Restore the oil and air circuits.
13. Restart the compressor.
14. Check for leakage.
15. Monitor oil/air temperature and verify normal cooling performance.

Technical Summary

Recommended catalog title:
Atlas Copco 2906097400 – GA90/160 A Cooler Kit for Air-Cooled Compressors, 2906-0974-00.

Note: A third-party catalog describes this as a cooler kit for G90+ / GA90–160 and also associates it with an 8,000-hour service application, but Atlas Copco’s official listing simply identifies it as the GA90/160 A Cooler Kit.

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