Atlas Copco MD100–400W Cooler Kit Replacement – 2906030300

Atlas Copco 2906030300 – MD100–400W Cooler Kit

The Atlas Copco 2906030300 (2906-0303-00) is an MD100–400W Cooler Kit designed for compatible Atlas Copco MD series dryer systems.

The cooler is an important part of the thermal-management system. Its purpose is to remove heat from the relevant operating medium during the drying/regeneration process, helping maintain the required operating temperatures and reliable dryer performance.

Working Process:

During normal operation, compressed air enters the MD dryer after being produced by the compressor.

The dryer uses a rotating desiccant system to remove moisture from compressed air. During the regeneration cycle, heat is required to remove the moisture accumulated in the desiccant.

The cooler participates in controlling the temperature of the relevant air stream after the heating/regeneration stage.

Hot regeneration air passes through the applicable cooling section, where heat is transferred away through the cooler.

As the air temperature is reduced, it becomes suitable for the next stage of the dryer cycle.

The cooled air then continues through the dryer circuit and the regenerated desiccant section becomes ready for another adsorption cycle.

This process repeats continuously as the MD dryer alternates between adsorption and regeneration.

Main Functions:

• Supports cooling in the MD100–400W dryer system.
• Removes excess heat from the relevant air stream.
• Helps control regeneration-related temperatures.
• Supports correct dryer operating conditions.
• Helps protect downstream dryer components from excessive temperature.
• Supports reliable continuous adsorption/regeneration operation.
• Helps maintain consistent compressed-air drying performance.

Operating Cycle:

1. Compressed-Air Entry: Compressed air enters the MD dryer.
2. Moisture Removal: The desiccant removes moisture from the compressed air.
3. Regeneration: A portion of the system performs regeneration of the moisture-loaded desiccant.
4. Heating: Regeneration air is heated as required by the dryer process.
5. Cooling: The hot air passes through the applicable cooler.
6. Heat Transfer: Excess heat is transferred away from the air.
7. Temperature Reduction: The air temperature is reduced to the required operating level.
8. Return to Process: The conditioned air continues through the dryer circuit.
9. Continuous Rotation: The dryer rotor continues rotating between adsorption and regeneration zones.
10. Continuous Drying: The process repeats to maintain dry compressed-air output.

Importance of the Cooler:

Temperature control is important in a desiccant dryer because regeneration requires elevated temperatures, while other sections of the process operate at lower temperatures.

If cooling performance is reduced, the temperature of the air entering downstream sections may become excessive.

Possible consequences include:

• Increased thermal stress.
• Reduced dryer efficiency.
• Excessive operating temperature.
• Reduced component life.
• Unstable dryer performance.
• Increased cooling demand.
• Possible high-temperature alarms.

The 2906030300 cooler kit helps restore the cooling function when the existing cooler or associated service components require replacement.

Possible Failure Conditions:

The cooler can experience deterioration because of:

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

Possible symptoms include:

• Excessive dryer temperature.
• Poor cooling performance.
• High-temperature alarms.
• Reduced drying efficiency.
• Increased regeneration temperature.
• Abnormal operating conditions.
• Increased thermal stress on surrounding components.

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

Maintenance Procedure:

Before servicing the cooler, stop the dryer and isolate all electrical and pneumatic energy sources according to the applicable Atlas Copco safety procedure.

Allow hot components to cool to a safe working temperature.

Depressurize the applicable system before opening any pressurized connections.

Inspect the cooler for:

• Dirt accumulation
• Blocked passages
• Corrosion
• Mechanical damage
• Leakage
• Damaged connections
• Reduced heat-transfer performance

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

Clean the mounting and connection areas.

Install the 2906030300 MD100–400W Cooler Kit correctly.

Ensure:

• Correct positioning of the cooler.
• Proper connection of the relevant air/cooling circuit.
• Correct sealing at connections.
• No obstruction of airflow.
• No foreign material remains inside the system.
• All fasteners and connections are correctly secured.

After installation, perform the applicable leak and functional checks.

Restart the dryer according to the manufacturer’s operating procedure.

Monitor:

• Regeneration temperature
• Cooler performance
• Airflow
• Pressure
• Dryer dew point
• Abnormal noise
• Leakage
• Overall operating stability

Service Benefits:

Using the Atlas Copco 2906030300 Cooler Kit during appropriate maintenance helps:

• Restore cooling performance.
• Maintain proper dryer operating temperature.
• Support efficient regeneration.
• Reduce thermal stress.
• Protect downstream components.
• Maintain reliable drying performance.
• Reduce the possibility of unexpected downtime.

Part Number: 2906030300
Alternative Number: 2906-0303-00 / 2906 0303 00
Brand: Atlas Copco
Official Description: MD100–400W Cooler Kit
Application: Atlas Copco MD100–400W dryer systems
Component Type: Dryer cooling component/service kit
Primary Function: Removes excess heat from the relevant dryer air circuit
Operating Function: Controls air temperature during the drying/regeneration process
Main Benefits: Effective temperature control, reliable regeneration, reduced thermal stress and dependable dryer operation.

Disclaimer: All manufacturer names, trademarks, model numbers, and part numbers are used solely for identification and compatibility purposes. Our products are high-quality aftermarket replacement products and are not manufactured, sponsored, endorsed, or authorized by the original equipment manufacturer (OEM). All trademarks remain the property of their respective owners.