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The daily maintenance and care methods of the chiller are as follows:
Daily maintenance of chillers
I. Regular inspection
1. Daily inspection
- Check the operating status indicator of the chiller to ensure that there are no abnormal alarm signals. For example, a red indicator usually indicates a fault, and a green indicator indicates normal operation.
- Check the temperature, pressure and other parameters on the display to confirm whether they are within the normal range. For example, the inlet and outlet temperatures of the cooling water should meet the design requirements, generally between 30℃ - 35℃; the inlet and outlet temperatures of the chilled water should be determined according to the specific process requirements, usually between 5℃ - 15℃.
- Check the appearance of the unit to see if there are any water leaks, oil leaks, etc. If water leaks are found, the leaks should be found and repaired in time. It may be caused by loose pipe joints, damaged seals, etc.; if oil leaks are found, it may be due to poor compressor sealing, and it is necessary to contact professionals for maintenance in time.
2. Weekly inspection
- Clean the air filter of the chiller. Blockage of the filter will affect the ventilation and heat dissipation of the unit and reduce the cooling efficiency. Rinse the filter with a vacuum cleaner or clean water to remove dust and impurities. Make sure the filter is firmly installed without looseness or deformation. - Check the electrical control system, including whether the wire connection is firm and whether the contactor is working properly. Check whether the wire connector is loose or oxidized, and deal with it in time if there is any problem; observe the contactor's pull-in condition and whether there is abnormal noise or heating.
- Check the heat exchange effect of the condenser and evaporator. The heat exchange effect can be judged by measuring the temperature difference between the inlet and outlet water. If the temperature difference is too large, the heat exchange tube may be blocked or scaled, and it needs to be cleaned.
3. Monthly inspection
- Check the operating status of the compressor, including sound, vibration, temperature, etc. Under normal circumstances, the compressor runs smoothly, the vibration is small, and the temperature is within a reasonable range. If abnormalities are found, the machine should be stopped immediately for inspection, which may be caused by internal failure of the compressor, poor lubrication, etc.
- Check the pressure and liquid level of the refrigerant. Use a professional pressure gauge and liquid level gauge to check whether the pressure of the refrigerant is normal and whether the liquid level is within the specified range. If the pressure is too high or too low, it may be due to refrigerant leakage or improper filling, which needs to be adjusted in time.
- Check the operation of the water pump and cooling tower. Make sure that the water pump runs smoothly without abnormal noise and water leakage; check whether the fan, filler and other components of the cooling tower are normal, damaged or blocked.
II. Cleaning and maintenance
1. Cleaning of condenser and evaporator
- Clean the condenser and evaporator regularly to remove dirt and impurities on the heat exchange tubes. Chemical cleaning or physical cleaning can be used. When chemically cleaning, use a special cleaning agent and operate according to the requirements of the instructions; when physically cleaning, you can use a high-pressure water gun to flush the heat exchange tubes, but be careful not to use too high a pressure to avoid damaging the heat exchange tubes.
- After cleaning, check the condenser and evaporator to ensure that the heat exchange tubes are not blocked, deformed, and well sealed.
2. Cleaning of the unit shell
- Clean the shell of the chiller regularly to remove dust and dirt. You can use a damp cloth to wipe the surface of the shell. Be careful not to use corrosive cleaning agents to avoid damaging the shell coating.
- Check the tightness of the shell to ensure that there is no air leakage or water leakage. If a poor seal is found, the seal should be replaced in time.
III. Maintenance precautions
1. Safety first
- When performing maintenance, the power supply must be cut off first to ensure that the unit is in a shutdown state. Avoid performing maintenance operations during operation to avoid accidents such as electric shock and mechanical injuries.
- Wear necessary personal protective equipment, such as gloves, goggles, etc. When performing cleaning and maintenance work, be careful to prevent chemicals from splashing on the body.
2. Professional maintenance
- For some complex maintenance work, such as compressor maintenance, electrical system debugging, etc., professional technicians should be entrusted to perform the operation. Avoid self-repair to avoid greater losses.
- Operate in accordance with the maintenance manual provided by the manufacturer and strictly abide by the maintenance cycle and maintenance requirements. If you have any questions, you can consult the manufacturer's after-sales service personnel.
3. Record maintenance
- Establish a maintenance record file for the chiller, recording the time, content, parts replaced, and other information for each maintenance. This helps to promptly identify potential problems with the unit and provide a reference for subsequent maintenance work.
- Regularly analyze maintenance records, summarize lessons learned, and continuously improve maintenance methods.
