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Compressor replacement procedure

LG refrigerator-compressor R134a
Compressor replacement procedure

Replacing a compressor in an LG refrigerator with Omega Tech Service Inc., whether it uses R134a or R600a refrigerant, is a complex process that involves handling potentially dangerous materials and requires specific technical skills, tools, and certifications.

Due to the significant differences in handling R134a (a hydrofluorocarbon) and R600a (isobutane, a flammable hydrocarbon), it’s crucial to follow safety protocols and environmental regulations closely.

This guide provides an overview, but remember, this work should ideally be done by a certified professional.

Safety First

Wear Protective Gear

Safety glasses and gloves are a must.

Work in a Well-Ventilated Area

Especially important with R600a due to its flammability.

Ensure Proper Certification

In many places, working with refrigerants requires EPA Section 608 certification for R134a or appropriate training for handling flammable refrigerants like R600a.

Tools and Materials Needed

General Steps for Compressor Replacement

1. Refrigerant Recovery

– Connect the refrigerator to a refrigerant recovery machine.

For R134a, use a machine designed for R134a recovery.
For R600a, because of its flammability, ensure the recovery process is suitable for flammable refrigerants.

– Recover the refrigerant into a recovery cylinder.

2. Remove the Old Compressor

– Disconnect the refrigerator from the power source.

– Locate the compressor and disconnect its electrical connections.

– Unfasten the compressor from its mounting brackets.

– Cut the refrigerant lines connected to the compressor, leaving enough room to work for installing the new compressor. Do this step with caution, especially with R600a, due to its flammability.

3. Prepare the New Compressor

– Place the new compressor into position and secure it with the mounting brackets.

– Solder or braze the refrigerant lines to the new compressor, ensuring a leak-free connection.

When working with R600a, ensure the environment is free from open flames or sparks.

4. Evacuate the System

– Connect a vacuum pump to the system and evacuate it to remove moisture and air.

This process can take several hours.

5. Charge with Refrigerant

Once the system is evacuated, charge it with the appropriate type of refrigerant (R134a or R600a), following the manufacturer’s specifications for the quantity. For R600a systems, ensure you’re using a precision scale and charge in a well-ventilated area to avoid concentration of the flammable gas.
Leak Test:
After charging, use a leak detector to ensure there are no leaks in the system. Pay special attention to the soldered or brazed joints.

6. Restart the Refrigerator

– Reconnect the electrical connections.

– Power on the refrigerator and monitor its cooling performance to ensure the new compressor is functioning correctly.

Important Considerations

Legality and Certification: Handling refrigerants and performing work on sealed refrigeration systems requires certification and adherence to legal and environmental regulations.

R600a Caution: Due to its flammable nature, extra caution must be taken when handling R600a, including ensuring adequate ventilation and avoiding ignition sources.

Warranty and Support: DIY repairs can void warranties. Check your warranty status and consider professional repair options.

Given the complexity and the specialized equipment required, compressor replacement is typically a job for a certified professional.

Our technicians of Omega Tech Service always have the necessary skills, tools, and certifications to safely and effectively complete the job while ensuring compliance with environmental regulations.

LG refrigerator-compressor R134a
Compressor replacement procedure

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