How do you clean a small chiller? How to maintain the chiller

Cleaning method of small chiller:1. Dismantle the partsIf you want to clean the chiller thoroughly, you must first disassemble it, because the parts you want to clean are not easily visible inside the group. However, because the various parts of the small chiller cross each other, and the lines are complicated and many, it is really difficult to disassemble, so before disassembly, it is necessary to understand the overall structure of the small chiller.

2. Clean the connection between the equipment and the condenserAfter the previous step of disassembly, find the direction of the condenser inlet and connect it to the pump inlet or outlet, and then use the tool to heat the pipe.

3. Dosing and cleaningAfter making sure that each step is done and the pipes are connected, first add clean water for about 20 hours of cleaning, then discharge the sewage, and then repeat 3 times. After the cleaning is completed, you can carry out dosing cleaning, of course, the pH value must be guaranteed between 4-5 and maintained for 2-3 hours during the cleaning process, and then after the liquid is discharged, the drug residue is rinsed to keep the pH at all.

4. Install back to the original stateAfter cleaning, the installation is completely completed.

The small chiller is mainly composed of water tank, circulating water pump, refrigeration compressor, condenser, evaporator, cooling fan, refrigeration controller and other components and related controllers. The cooling water in the chiller is continuously circulated between the equipment and the evaporator of the compressor refrigeration system through the work of the circulating water pump. The heat generated during the operation of the equipment is finally conducted into the air through the refrigeration cycle of the compressor refrigeration system.

The corresponding control device can control the operation of the compressor refrigeration system according to the set parameter requirements, so as to ensure that the cooling water temperature of the equipment is always controlled within the specified range. In order to ensure the stable and safe operation of the equipment. The cooler also has advanced functions such as circulating water flow detection alarm, over-temperature alarm, and automatic water temperature adjustment.

The use of small chillers can keep the heating equipment at a constant temperature, effectively avoid thermal deformation, and ensure the quality and efficiency of production.

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.

Maintenance work of the chiller:

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, it is recommended to use deionized water to control the water temperature at about 25 degrees Celsius.

5. When using ultraviolet laser 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.

1.Usually check whether the water replenishment device of the system is normal, and it is strictly forbidden to have a lack of water in the system.

2.The inner fin heat exchanger of the air-cooled unit should be cleaned regularly to ensure the heat exchange effect.

3.When the unit is stopped for a long time, the water should be drained in the pipeline in the outdoor part to avoid freezing and cracking the pipeline due to the temperature dropping.

4.No sundries and flammable materials shall be piled up near the chiller.

5.In front of the exhaust fan of the air-cooled chiller, avoid high walls and stacked objects blocking the exhaust channel and affecting the cooling effect.

6.Do not turn the switch button on and off frequently.

7.The refrigeration room should be ventilated and dry.

8.Before starting the chiller, the compressor should be preheated, and then the power should be turned on to make the main engine work.

9.The unit should be kept clean at all times, for example, the water volume of the cooling water circulation system, the water temperature in and out of the tower should be checked at any time, and the working condition of the electronic water treatment instrument on the water supply and pipeline should be checked at any time.

10 Before entering the winter, drain all the water in the cooling tower sink and outdoor pipe part to avoid freezing and cracking the pipe.

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

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

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.

1. The start and stop 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.

Therefore, the start-up sequence of chillers is: (must be strictly followed).

The cooling tower fan is turned on, the cooling water pump is turned on, the cold water pump is turned on, and the chiller is stopped.

The shutdown sequence of chillers is: (must be strictly followed).

The chiller is stopped, the cooling tower fan is stopped, the cooling water pump is stopped, and the chilled water pump is stopped.

Note: When the machine is shut down, the chiller should be shut down half an hour before the end of work, and the cold water pump should be shut down after the end of work, which is conducive to saving energy, while avoiding failure and downtime and protecting the unit.

Before running the refrigeration cycle, confirm that all the valves in the heating cycle pipeline are closed.

2. Operation of chiller.

Preparation before booting.

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.

Initiate. 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 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) When 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, the control system will automatically take corresponding measures to protect the unit and display the fault information on the unit screen. (Please refer to the Installation, Operation and Maintenance Manual for details).

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.

Stoppage. 1) As long as 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.

3. Operation of fans and pumps.

The cooling tower fan, cooling water pump and chilled water pump are all independently controlled, and the power supply should be confirmed to be normal, no reverse phase, and no phase loss before starting.

Before opening the pump, you should confirm that the valves in the pipeline are open.

The first point: keep the surface of the chiller filter clean, air circulation around the filter, clean the filter regularly, generally blow the filter with compressed air once every three weeks. The second point:

Common faults and troubleshooting methods of chillers, common faults and troubleshooting methods of chillers: turn on the power switch, the power indicator light of the chiller is not lit, 1 the fuse is not installed, and the appropriate fuse is installed The third point: start and stop:

Start the status key on the keyboard, and then switch the unit on off (on) toggle switch under the keyboard to the ON (on) position, the unit will do a self-test, a few seconds later, a compressor starts, another compressor starts after the load increases, once the unit starts, all operations are not automatic according to the change of cooling load (chilled water supply and return temperature) automatic start and stop.

Han's Refrigeration hopes to help you, you can ask them directly.

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.