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Understanding the working principle of an industrial chiller and addressing common faults like low-pressure alarms are crucial for maintaining efficient operations. HuaZhao explores Solutions for Low Pressure Alarm of Chiller, providing a comprehensive guide to troubleshooting and resolving these issues effectively
Industrial chillers operate through three interconnected systems:
Refrigerant Circulation: Absorbs heat from the cooled object, vaporizes it, compresses it, and releases heat through a condenser.
Water Circulation: Ensures consistent cooling through heat exchange.
Electrical Automatic Control: Regulates the entire system for optimal performance.
The refrigerant cycle involves absorbing heat in the evaporator, compressing vapor into high-pressure steam, cooling it in the condenser, and repeating the process to ensure efficient cooling.
A low-pressure fault in an industrial chiller occurs when the compressor inlet pressure drops below 0.2 MPa, triggering the low-pressure protection relay. Normal suction pressure should range between 0.3–0.45 MPa.
Low-pressure alarms often result from refrigerant leakage. If the leakage occurs near water-contact areas, such as the evaporator, water can infiltrate the refrigeration system, damaging the compressor. Identifying and resolving low-pressure faults promptly is essential to prevent severe system failures.
Blockages in the filter drier or copper pipes can restrict refrigerant flow, reducing cooling capacity.
Symptoms: A temperature difference at the filter ends; severe cases may cause dew or frost formation.
Solution: Replace the filter drier with the same type and specification. Clean or blow out the system if necessary.
A malfunctioning low-pressure protector can cause the system to incorrectly detect low pressure.
Diagnosis: Measure the pressure and check the protector with a multimeter.
Solution: Replace the faulty low-pressure protector with a compatible model.
A non-functioning solenoid valve prevents the system from maintaining proper pressure.
Symptoms: Gradual pressure drop and a low-pressure alarm.
Solution: Replace the solenoid valve coil if it shows infinity resistance.
A defective expansion valve can disrupt the balance between high and low pressure.
Symptoms: Low pressure that does not rise, even with added refrigerant.
Solution: Adjust the valve. If unsuccessful, replace it with a matching model.
Refrigerant leakage is a primary cause of low-pressure alarms.
Diagnosis: Test for leaks using a meter or inspect for oil stains.
Solution: Weld leaks, test for pressure, and recommission the system.
Insufficient water flow or blockages in the evaporator can hinder heat exchange.
Symptoms: Frost or ice on the compressor surface.
Solution: Replace or repair the water pump and clear blockages in the evaporator using high-pressure water or a cleaning agent.
Flattened pipes restrict refrigerant return flow, causing pressure imbalances.
Solution: Locate and replace flattened pipes with the correct size.
Proper maintenance of industrial chillers can significantly reduce the risk of low-pressure faults. Regularly inspect components like filters, pumps, and valves, and ensure refrigerant levels and water flow are optimal.
Identifying and addressing the causes of low-pressure alarms is vital for ensuring the smooth operation of industrial chillers. By implementing the above Solutions for Low Pressure Alarm of Chiller, businesses can enhance system efficiency, reduce downtime, and extend the lifespan of their equipment.
For more information about the solutions for low pressure alarm of chiller, welcome to contact us at +86 15262310939 or write to us at j.li@szhuateng.com. We will be happy to help you out!
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