Screw Chiller Maintenance and Servicing Guide

Screw chillers are widely used in industrial and commercial applications, often operating in harsh conditions. Regular maintenance and preventive servicing are essential to ensure efficient operation, longevity, and safety.

This guide outlines the key safety measures, maintenance precautions, and startup checks for screw chillers.

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1. Safety Precautions

Before performing any maintenance or servicing, follow these safety guidelines:

⚠️ 1. Do Not Open Electrical Panels While the Chiller is Running

• Live electrical components pose an electrocution hazard.

⚠️ 2. Stop the Chiller Immediately If Unusual Noises Occur

• Strange noises may indicate bearing wear, refrigerant leaks, or mechanical failure.

⚠️ 3. Keep Flammable Materials Away

• Avoid placing flammable gases or objects near the chiller, especially in hot weather.

⚠️ 4. Never Insert Hands into the Running Chiller

• Moving parts can cause severe injury.

⚠️ 5. Follow Proper Operating Procedures

• Always refer to the manufacturer’s manual before operation.

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2. Precautions During Maintenance & Servicing

🔹 1. Turn Off the Power Before Maintenance

• Disconnect power and wait at least 10 minutes before inspecting electrical components.

🔹 2. Only Authorized Personnel Should Access Electrical Panels

• Non-trained personnel must not touch the control panel to avoid electrical hazards.

🔹 3. Keep Hands Dry When Operating the Chiller

• Wet hands can lead to electric shock or injury.

🔹 4. Turn Off the Chiller If Not in Use for Long Periods

• Prolonged downtime requires shutting down power to prevent electrical risks.

🔹 5. Wear Proper Safety Gear During Maintenance

• Use gloves, safety goggles, and insulated tools for protection.

🔹 6. Do Not Perform Maintenance on a Running Chiller

• Ensure the unit has completely stopped before servicing.

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3. Post-Maintenance Startup Checklist

After maintenance, follow these critical checks before restarting the chiller:

✔ 1. Check the Power Supply

• Confirm the power indicator light is on.

✔ 2. Monitor System Pressure

• Use high/low-pressure gauges to ensure the system is within normal operating pressure.

✔ 3. Ensure Unobstructed Airflow

• Remove any debris, obstructions, or blockages around the chiller.

✔ 4. Inspect Piping and Valves

• Verify that refrigerant and water flow pathways are clear.

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Conclusion

Proper maintenance and servicing of screw chillers help to:
✅ Prevent unexpected breakdowns
✅ Improve energy efficiency
✅ Enhance operational safety
✅ Extend chiller lifespan

By following safety precautions, maintenance protocols, and startup checks, facilities can ensure optimal chiller performance while minimizing downtime and repair costs. 🚀