Atlas Copco IMD 260 Regeneration Cooler Kit Replacement – 2906084600

Atlas Copco 2906084600 – IMD 260 Regeneration Cooler Kit

The Atlas Copco 2906084600 (2906-0846-00) is a Regeneration Cooler Kit designed for the IMD 260 adsorption dryer.

The regeneration cooler is an important component of the dryer regeneration circuit. Its primary function is to reduce the temperature of the regeneration air after it has been heated and used to remove moisture from the desiccant material.

The cooler helps bring the regeneration air back toward the required operating temperature before it continues through the dryer circuit.

Working Process:

During normal IMD 260 operation, compressed air enters the adsorption dryer and passes through the desiccant material.

The desiccant absorbs moisture from the compressed air, producing dry compressed air for the downstream system.

As the desiccant becomes moisture-loaded, it must be regenerated.

During regeneration, a controlled air stream is heated and directed through the moisture-loaded desiccant.

The heated regeneration air removes the accumulated moisture from the desiccant.

After passing through the regeneration section, the air contains the removed moisture and has undergone a significant temperature change.

The regeneration cooler then removes excess heat from the regeneration air.

By reducing the air temperature, the cooler helps maintain the required thermal conditions within the dryer and protects downstream components from excessive temperature.

The cooled regeneration air then continues through the applicable dryer circuit.

This adsorption and regeneration process repeats continuously to maintain the drying capacity of the IMD 260.

Main Functions:

• Cools regeneration air in the IMD 260 dryer.
• Removes excess heat generated during regeneration.
• Helps control regeneration-air temperature.
• Protects downstream dryer components from excessive heat.
• Supports stable regeneration performance.
• Helps maintain proper desiccant regeneration.
• Supports continuous dryer operation.
• Helps maintain consistent compressed-air drying performance.

Regeneration Operating Cycle:

1. Moist-Air Entry: Compressed air enters the dryer.
2. Adsorption: Desiccant material removes moisture from the compressed air.
3. Desiccant Loading: The desiccant gradually accumulates moisture.
4. Regeneration Initiation: The dryer switches the applicable section into regeneration.
5. Heating: Regeneration air is heated to the required temperature.
6. Moisture Removal: Heated air passes through the moisture-loaded desiccant.
7. Moisture-Carrying Air: The regeneration air carries the removed moisture away.
8. Cooling: The hot regeneration air passes through the regeneration cooler.
9. Temperature Reduction: Excess heat is transferred away.
10. Controlled Return: The conditioned air continues through the applicable regeneration circuit.
11. Regenerated Desiccant: The desiccant is restored for another adsorption cycle.
12. Continuous Operation: The dryer repeats the cycle automatically.

Importance of the Regeneration Cooler:

Correct regeneration temperature is essential for reliable adsorption-dryer operation.

The regeneration process requires elevated temperature to remove moisture effectively from the desiccant.

However, excessive temperature can increase thermal stress on components and may negatively affect dryer operation.

The regeneration cooler therefore provides controlled heat removal after the regeneration stage.

A properly functioning cooler helps maintain the required thermal balance between the heating and regeneration sections.

Possible Failure Conditions:

The regeneration cooler may experience deterioration due to:

• Dust accumulation.
• Fouling of heat-transfer surfaces.
• Restricted airflow.
• Corrosion.
• Mechanical damage.
• Reduced heat-transfer efficiency.
• Leakage.
• Thermal cycling.
• Contamination.

Possible symptoms include:

• Excessive regeneration-air temperature.
• High-temperature alarms.
• Reduced cooling performance.
• Unstable regeneration.
• Reduced dryer efficiency.
• Increased thermal stress.
• Abnormal dryer operating temperatures.
• Reduced desiccant regeneration effectiveness.

These symptoms should be diagnosed carefully because temperature problems can also originate from heaters, fans, valves, temperature sensors, airflow restrictions or other dryer components.

Maintenance Procedure:

Before servicing the regeneration cooler, stop the IMD 260 dryer and isolate all applicable electrical and pneumatic energy sources according to the manufacturer’s safety procedure.

Allow hot components to cool to a safe service temperature.

Depressurize the applicable air circuit before opening pressurized connections.

Inspect the regeneration cooler for:

• Dirt accumulation
• Blocked cooling passages
• Corrosion
• Mechanical damage
• Leakage
• Damaged connections
• Restricted airflow
• Signs of overheating

Remove the existing cooler/service components according to the applicable Atlas Copco maintenance procedure.

Clean the relevant mounting and connection surfaces.

Install the 2906084600 Regeneration Cooler Kit correctly.

Ensure that:

• The cooler is correctly positioned.
• Airflow paths are unobstructed.
• All connections are properly secured.
• Sealing surfaces are clean.
• Applicable seals are correctly installed.
• No foreign material remains inside the system.

After assembly, perform the applicable leak and functional checks.

Restart the dryer according to the manufacturer’s procedure.

Monitor:

• Regeneration-air temperature
• Cooler performance
• Airflow
• Pressure
• Dryer dew point
• Heater operation
• Abnormal noise
• Leakage
• Overall regeneration stability

Service Benefits:

Using the Atlas Copco 2906084600 Regeneration Cooler Kit during appropriate maintenance helps:

• Restore regeneration-air cooling.
• Maintain proper regeneration temperature.
• Support effective desiccant regeneration.
• Reduce thermal stress.
• Protect downstream components.
• Improve dryer operating stability.
• Maintain reliable drying performance.
• Reduce the risk of unexpected downtime.

Part Number: 2906084600
Alternative Number: 2906-0846-00 / 2906 0846 00
Brand: Atlas Copco
Description: Regeneration Cooler Kit
Application: IMD 260 adsorption dryer
Component Type: Regeneration cooling/service kit
Primary Function: Removes excess heat from regeneration air
Operating Function: Cools heated regeneration air after it has passed through the desiccant regeneration section
Main Benefits: Controlled regeneration temperature, reliable desiccant regeneration, reduced thermal stress and dependable dryer performance.

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