Water cooled chiller maintenance for water cooled chillers

During the normal operation of the water-cooled chiller, it is inevitable that the refrigeration effect will be affected by dirt or other impurities. Therefore, in order to prolong the service life of the main engine group and achieve a better refrigeration effect, maintenance and maintenance should be done regularly to ensure the operation quality of the chiller and improve the production efficiency.

The details are as follows:

1. Regularly check whether the voltage and current of the chiller are stable, whether the compressor running sound is normal, and when the chiller is working normally, the voltage is 380V, and the current is normal in the range of 11A-15A.

2. Regularly check whether the refrigerant of the chiller has leakage: it can be judged by referring to the parameters displayed in the high and low pressure gauge on the front panel of the main engine. According to the temperature change (winter, summer), the pressure display of the chiller is also different, when the chiller is working normally, the general high pressure display is 11-17kg, and the low pressure display is normal in the range of 3-5kg.

3. Check whether the cooling water system of the chiller is normal, whether the cooling tower fan and sprinkler shaft are running well, and whether the water replenishment of the built-in water tank of the chiller is normal.

Fourth, the chiller should be cleaned for six months, and cleaned once a year, and the main cleaning parts include: cooling tower, heat dissipation pipe pipe and condenser part to ensure better refrigeration effect.

5. When the chiller is not used for a long time, the circuit switches such as the water pump, compressor and the total power supply of the cooling water tower should be turned off in time.

ChillerChiller maintenance

The maintenance content of the chiller is usually divided into two parts, one part is about the equipment wearing parts and other items that need to be checked and maintained frequently, which we call monthly regular maintenance; Another item is the in-depth maintenance of major components such as condensers, compressors, etc., after a certain period of operation, called annual maintenance.

Monthly regular maintenance of chiller content:

1. Check whether the voltage is normal and out of phase.

2. Check and record the operating current.

3. Measure and record whether the high and low pressure pressure and temperature control temperature are normal. (During normal operation, the high pressure is low pressure.)

4. Check whether the interlocking control circuit device is loose and aging.

5. Check whether the oil level and oil temperature are normal.

6. Check whether the compressor has abnormal sound and abnormal vibration.

7. Refrigerant system test.

8. Overall commissioning and testing.

9. Regularly check whether the water quality of chilled water and cooling water is normal, and replace the water source in time when the water quality becomes dirty and deteriorated.

Annual maintenance content of chiller

1. Clean the condenser (clean once every six months of operation).

2. Clean the cooling tower (water-cooled type is cleaned once every three months).

3. Check the refrigeration oil and lubricating oil system, and replace and replenish if necessary.

4. Check and maintain the circuit system of the host.

5. Compressor motor coil insulation test.

6. Check whether the filter drier is normal and whether there is any blockage, and replace it if necessary.

7. Check the amount of refrigerant and replenish the refrigerant in time.

8. Check and correct the high and low pressure switches.

9. Check and calibrate the thermostat.

10. Test run and total calibration to test whether the overheat is normal and whether there is abnormal sound in each component.

Chiller maintenance is important

As an important refrigeration source equipment for industrial production, the chiller can operate stably for a long time under normal circumstances and provide sufficient cooling capacity required for production. In order to avoid many unnecessary failures of the chiller and prolong the service life of the equipment, in the daily use of the equipment, in addition to the correct operation of the chiller, we should also have an in-depth understanding of the maintenance matters of the chiller, and regularly carry out equipment shutdown inspection, maintenance and maintenance.

Hello, here the Kaideli chiller talks about the cleaning method of the evaporator, and the cleaning method includes chemical cleaning and physical cleaning. When the scaling is soft scaling, physical cleaning is generally used first, and high-pressure water flow is used to flush the condenser pipe wall to wash the mud and scale, and when the scaling is hard scale, chemical cleaning must be carried out.

The combination of the two cleaning methods can effectively clean the inside of the evaporator of the industrial chiller.

Steps for chemical cleaning of evaporator condenser:

1. Close the valves of the condenser and evaporator, and connect the pressure gauge tube, thermometer tube, liquid distribution tank, sewage pipe and anti-corrosion pump to form a cycle and clean it;

2. Add pickling corrosion inhibitor, it will adhere to the inner wall of the condenser metal to protect the inner wall of the condenser metal and prevent the acid from reacting with it;

3. Solid pickling cleaning agent is added to remove the scale with calcium carbonate as the main ingredient, and the amount of cleaning agent is determined according to the amount of mud deposit;

4. Add neutralizing passivator, and neutralize the residual acid in time after chemical cleaning in the condenser and evaporator to prevent secondary rusting;

5. Generally, if the scale of the evaporator equipment is thick, it is necessary to add a sludge stripping agent to quickly dissolve in water and accelerate the reaction of deep scale.

In daily use, doing a good job in the maintenance of the chiller can not only improve the work efficiency of the chiller, prolong the life of the chiller, but also effectively reduce the operation danger and make the chiller more durable.

Chiller maintenance work:

1. Place the chiller in a ventilated and cool place, and it is recommended to be below 40 degrees.

2. Regularly clean the condenser of the chiller and the dust net.

3. Replace the circulating cooling water regularly, and the water tank should be cleaned regularly, generally once every 3 months.

4. The water quality and water temperature of the circulating water will affect the service life of the laser tube, so it is recommended to use deionized water to control the water temperature at about 25 degrees Celsius.

5. When using the chiller, keep the machine room clean and well ventilated, and clean the condenser regularly to ensure the normal operation of the unit.

6. When the unit is shut down due to a fault, you should press the alarm stop button first, and then check the cause of the failure, and remember not to force the machine to start and run before troubleshooting.

7. If there is no emergency when using, do not turn off the unit by cutting off the power supply at will; If the unit is out of service for a long time in winter, the unit should be shut down first, and then the main power supply should be turned off, and the water in the UV laser chiller should be discharged.

Chiller has been an indispensable part of plastics, electronics, chemicals, food preservation, ink printing, pharmaceutical, machinery and other industries, its main role is to provide chilled water to equipment products to achieve the purpose of cooling. The cooling effect of an industrial chiller depends on its quality. However, we all know that there will always be wear and tear in the use of industrial chillers, so it is necessary to regularly record and analyze its operating parameters, listen to the sound made during operation, check the use of refrigerant and refrigeration oil, etc., and regularly maintain it.

Schematic diagram of the working principle of the chiller.

Chiller maintenance method steps.

1: Check the compressor The compressor is an industrial chiller"Heart"The quality of the chiller directly affects the stability of the chiller. If the compressor fails and repairs, the cost is relatively high, especially the accuracy of the screw compressor.

Therefore, if you hear an abnormal sound or other conditions from the compressor, be sure to find out the cause and perform maintenance.

2: Clean the condenser and evaporator regularly.

Condenser The evaporator is the second most important component of an industrial chiller and is best cleaned every six months. The cooling water of the water-cooled condenser is an open circulation loop, and the tap water used is circulated through the cooling water tower, which is easy to decompose and deposit impurities to form scale on the water pipe, which affects the heat transfer effect. Excessive fouling also reduces the flow section of the cooling water, reduces the amount of water, and increases the condensation pressure.

3: Regular inspection of the safety valve The condenser and evaporator of the industrial chiller belong to the pressure vessel, according to the regulations, the safety valve should be installed on the high-pressure end of the chiller, that is, the condenser body, once the unit is in an abnormal working environment, the safety valve can automatically relieve the pressure to prevent the damage that the high pressure may cause to the human body.

4: Replace the lubricating oil regularly After long-term use, the oil quality of the lubricating oil will deteriorate, and the impurities and moisture inside the oil will increase, so it is necessary to observe and check the oil quality regularly. Once the problem is found, it should be replaced in time, and the replacement of the lubricating oil brand is best subject to the original manufacturer.

5: Replace the filter drier regularly The filter drier is an important part to ensure the normal circulation of the refrigerant. Since water and refrigerant are not miscible with each other, if the system contains water, it will greatly affect the operating efficiency of the chiller, so it is important to keep the inside of the system dry, and the filter element inside the filter drier must be replaced regularly.

It is recommended to contact Han's Refrigeration directly for chiller-related questions. They are experienced.

A few tips for chiller maintenance.

The following Xinbang industrial equipment technical commissioner will teach you a few tricks:

The most important point is: keep the surface of the chiller filter clean, the air circulation around the filter, clean the filter regularly, and generally blow the filter with compressed air once every three weeks. Reduce the occurrence of mold "sweating".

Before stopping the plastic machine, turn off the cold water sluice engine of the attached mold, or turn off the cold water to increase the water temperature in the mold cavity, so that the mold will not produce rust accumulation. If the chiller has been used for more than half a year, or the high and low voltage engine often fails, or the cooling capacity is reduced, please arrange a technician to clean the radiator (if the chiller has a pressure gauge installed, whether the pressure of the high pressure gauge is higher than 300 psi, if so, the surface of the radiator should be cleaned, keep it clean, and improve the effect of the radiator). If the industrial chiller still fails after repeated cleaning according to the above instructions, please arrange for the staff to repair it.

If the industrial chiller is out of use for a period of time, due to the solidification of water and sewage accumulation, the pump blade of the water pump may be solidified by the dirt, and the rotor of the water pump must be loosened first when the machine is turned on to avoid the pump blade not rotating, resulting in the burning of the fuse. (Suitable for chillers below 5 horsepower) Stop the machine first by cleaning the chiller maintenance radiator, remove the filter screen on the front lower panel of the machine, and blow off the dust on the surface of the filter screen with compressed air. If the radiator is dirty, it should also be cleaned together.

If possible, you can spray the air conditioner cleaner on the surface of the heat dissipation screen, wait for a few minutes and rinse it with clean water, and repeat it until the surface of the filter screen is clean.

1.Clean the filter regularly: The filter of the chiller needs to be cleaned regularly to ensure its normal operation and prolong its service life.

2.Clean the condenser regularly: The condenser is an important part of the chiller and needs to be cleaned regularly to ensure its normal operation and prolong its service life.

3.Check the cooling water regularly: The cooling water is an important part of the chiller, and the water quality and water level need to be checked regularly to ensure its normal operation and prolong the service life.

4.Check the electrical components regularly: The electrical components of the chiller need to be checked regularly to ensure its normal operation and prolong its service life.

5.Regular inspection of the compressor: The compressor is the core component of the chiller and needs to be checked regularly to ensure its normal operation and prolong its service life.

6.Replace the refrigerant regularly: The refrigerant is an important part of the chiller and needs to be replaced regularly to ensure its normal operation and prolong its service life.

7.Regular maintenance of the lubrication system: The lubrication system is an important part of the chiller, which needs regular maintenance to ensure its normal operation and prolong its service life.

You can learn about the temperature controlled chiller in the middle energy, and the quality is guaranteed!

1. When the chiller is suitable for installation, it is necessary to ensure that the power socket is in good contact and the bottom line is reliably grounded 2. When the daily chiller is running, it is necessary to ensure that its working voltage is stable and normal 3. The power supply frequency of the chiller must be matched, otherwise it will cause damage to the machine 4. In order to protect the circulating water pump of the chiller, the chiller cannot be run without water 5. Ensure that the air inlet and outlet channels of the chiller are smooth.

6. The filter screen of the air inlet must be cleaned regularly.

7. Pay attention to the influence of condensate (when the water temperature is lower than the ambient temperature and the ambient humidity is large, condensate will be generated on the surface of the circulating water pipe and the cooled device

1. The start-up and shutdown sequence of the chiller.

To ensure that the air conditioner host can operate normally after starting, it must be ensured:

The condenser has good heat dissipation, otherwise it will stop due to the high condensation temperature and the corresponding condensing pressure, which will cause the high-pressure protection device of the chiller to stop, or even lead to failure.

The cold water in the evaporator should be circulated, otherwise it will stop due to the low temperature of the cold water, which will cause the cold water temperature protection device to stop, or because the evaporation temperature and the corresponding evaporation pressure are too low, it is the action of the low pressure protection device of the chiller and stop the equipment, or even cause the cold water in the evaporator to freeze and damage the equipment.

2. The operation of the chiller is divided into four steps: before starting, starting, normal operation and shutdown.

Before turning on the machine, (1) confirm that the power supply of the unit and controller is connected.

2) Confirm that the cooling tower fan, cooling water pump, and chilled water pump are all turned on.

3) Confirm that the end fan coil unit has been energized and turned on.

Start (1) Press the status key on the keyboard, and then switch the ON off toggle switch of the unit under the keyboard to the ON (on) position.

2) The unit will do a self-test, after a few seconds, one compressor will start, and the other compressor will start when the load increases.

3) Once the unit is started, all operations are not automatic. The unit automatically starts and stops according to the change of cooling load (chilled water supply and return temperature).

Normal operation. 1) The unit is running normally, the controller will monitor the oil pressure, motor current and other parameters of the system, once there is any problem with the air-cooled chiller and the water-cooled chiller, the control system will automatically take corresponding measures to protect the unit and display the fault information on the screen of the unit.

2) In every 24-hour operation cycle, there should be a special person to permanently record the operating conditions of the unit at a fixed time interval.

Shutdown (1) As long as the ON OFF toggle switch of the unit under the keyboard is switched to the disconnected position, the unit can be stopped.

2) In order to prevent damage, do not cut off the power supply of the unit, even when the unit is down.