2. During the daily operation of the water chiller, it is necessary to ensure its stable and normal working voltage.
3. The power frequency of the chiller must be well matched, otherwise it will damage the machine.
4. In order to protect the circulating water pump of water chillers, water chillers cannot run without water.
5. Ensure that the air inlet and outlet channels of the cooler are unblocked.
6. The filter screen of the air inlet must be cleaned regularly.
7. Pay attention to the influence of condensed water (when the water temperature is lower than the ambient temperature and the ambient humidity is higher, condensed water will be generated on the surface of circulating water pipes and cooled equipment. If this happens, it is recommended to raise the water temperature or keep the temperature of water pipes and cooled equipment).
Qingdao Refrigerator Maintenance Ouneng Mechanical Refrigerator
We produce chillers, and the prices of chillers on the market are uneven now.
I think the most important thing to buy a water dispenser is to ensure.
1. Are the nose and circulating water pump new (affecting the cooling capacity and life)?
2. Does the design of refrigeration pipeline consider shock prevention (which will affect the service life), and is the refrigerant pressure holding test conducted before leaving the factory (to prevent refrigerant leakage)?
3. Good refrigeration accessories, shell-and-tube condenser will be better than water tank coil condenser, no matter from refrigeration effect or service life. There are electrical appliances, control panels, whether there are some protective measures, overload, lack of phase and so on. The controller used for text display is always superior to the controller used for code display.
How to maintain the chiller? Wps chillers need to change the circulating cooling water regularly, so it is recommended to use pure water or distilled water. Remove and clean the dust screen of the water cooler regularly, and clean the dust on the condenser; If there is a matching filter element, the filter element needs to be replaced regularly.
How to maintain the chiller? 1, starting and stopping sequence of water chillers
In order to ensure the normal operation of the air conditioning main engine after starting, it is necessary to ensure that:
The condenser dissipates heat well, otherwise the high-pressure protection device of the water chiller will shut down because the condensation temperature and the corresponding condensation pressure are too high, and even lead to failure.
The cold water in the evaporator should be circulated, otherwise it will stop because of the low temperature of the cold water, which will lead to the action of the cold water temperature protection device, or stop because the evaporation temperature and the corresponding evaporation pressure are too low, which will even lead to the freezing of the cold water in the evaporator and damage the equipment.
Therefore, the starting sequence of water chillers is: (strictly observed)
The cooling tower fan is turned on, the cooling water pump is turned on, and the chiller is turned off.
The shutdown sequence of water chillers is: (strictly observed)
Cooler stop cooling tower fan stop cooling water pump stop cooling water pump stop.
Attention: ① When stopping, turn off the chiller half an hour before going to work, and turn off the cold water pump after work, which is beneficial to saving energy, avoiding stopping and protecting the unit.
(2) Before running the refrigeration cycle, it should be confirmed that all the valves of the heating cycle pipeline have been closed.
2, the operation of the chiller
(1) Preparation before startup.
1) Confirm that the power supply of the unit and the controller is connected.
2) Confirm that the cooling tower fan, cooling water pump and cold water pump are all turned on.
3) Confirm that the fan coil unit at the end is powered on.
② Start.
1) Press the status key on the keyboard, and then switch the device on/off switch under the keyboard to the on position.
2) The unit will conduct self-inspection. After a few seconds, one compressor will start, and the other compressor will start after 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 water temperature).
③ Normal operation
1) The unit is running normally, and the controller will monitor system parameters such as oil pressure and motor current. If there is any problem, the control system will automatically take corresponding measures to protect the unit and display 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 operation of the unit at fixed time intervals.
4 turn it off.
1) As long as the unit on/OFF toggle switch under the keyboard is turned to the off position, the unit can be stopped.
2) In order to prevent damage, don't cut off the power supply of the unit even if the unit stops.
3, fan, water pump operation
(1) The cooling tower fan, cooling water pump and cold water pump are all independently controlled. Before starting, make sure that the power supply is normal, and there is no phase reversal and no phase change.
(2) Before starting the pump, make sure that the valve in the pipeline has been opened.
How to maintain the air-cooled chiller? General conditions do not need to be maintained. If installed outdoors, please drain water in autumn and fill the system with water before use in summer. If it is a split machine, there is no need to fill or drain water.
How to maintain the condenser of air-cooled chiller How to maintain the condenser of Nanjing Ouneng mechanical air-cooled chiller?
Condenser is one of the four refrigeration components of chiller, and its performance will gradually decline with the extension of service time. Therefore, the condensation pressure of the cooler refrigeration system will be higher than that during normal operation. In order not to reduce the performance of the condenser, it is necessary to maintain the condenser regularly.
The condensers used in small water chillers are divided into air-cooled condensers and water-cooled condensers.
1, Ouneng mechanical air-cooled condenser is mainly used for air-cooled water chillers, with air as cooling medium. Because there are often dust or other sundries in the air, some of these dust or sundries will fall on the outer surface of the condenser fins, which will make the heat dissipation effect of the condenser worse over time, especially in the harsh environment. Therefore, we should clean them regularly.
The cleaning method of air-cooled chiller condenser is: pure dust can be washed and blown clean by compressed air, or it can be vacuumed by vacuum cleaner. If there is a lot of dirt on the fin condenser, you can clean the radiator tube and fin with gasoline or non-corrosive cleaning agent to improve the heat dissipation effect.
2. Ouneng mechanical water-cooled condenser is mainly used for water-cooled chillers. For this kind of condenser, the main problem is descaling. Its cleaning cycle is generally based on water quality. If the water quality is poor, clean it at least once a year. If the water quality is good, such as pure water, it can be cleaned once every 2 ~ 3 years.
There may be some chillers that use double-tube water-cooled condensers, which can be pickled. The operation method is: remove the condenser, drain the accumulated water inside, and then inject 10% dilute sulfuric acid solution into the condenser tube until the solution flows out from the water outlet. Dilute sulfuric acid can be released after staying in the condenser for 20 ~ 30 minutes. This action is repeated two or three times. Finally, install the connecting pipe between the cooling water pipe and the condenser, open the cooling water valve to wash 10 ~ 20~30min, and the anti-scaling cleaning work is over.
Or consult the manufacturer's after-sales service to provide support.
Repair and maintenance of water chillers. Well, this can only be used for water chillers and production.
How to maintain industrial chillers? I'm glad Kadley chiller answered your question.
The refrigeration effect of industrial chillers depends on their quality. But we all know that industrial chillers are in use.
There will always be wear and tear in the process, so it is necessary to record and analyze its operating parameters regularly and listen to the sounds made during operation.
Sound, check the use of snow, refrigeration oil, etc. , and carry out regular maintenance operations on it. Daily maintenance of industrial water chillers
Maintenance is very simple, and users are advised to consider the following points:
(1) Check the compressor regularly.
Compressor is the "heart" of industrial water chillers, and its quality directly affects the stability of water chillers in use. if
When the compressor breaks down, the cost is relatively high, especially the screw compressor has high precision and high price. Therefore, such as
When you hear abnormal noise or other conditions of the compressor, you must contact the refrigeration factory to find a professional engineer to check and find out the reason.
Causes and maintenance treatment.
(2) Clean the condenser and evaporator regularly.
Condenser/evaporator is the second most important part of industrial water chillers, and it is best to clean it once every six months. Water cooling condensation
The cooling water of the cooler is an open circulation loop, and the tap water used is recycled through the cooling tower, which is easy to decompose and precipitate.
Impurities form scale on water pipes, which affects the heat transfer effect. Excessive scaling will also reduce the circulating cross section of cooling water and reduce the water quantity.
Less, the condensation pressure rises. Therefore, when the tap water used is of poor quality, it is best to clean it at least once a year and remove it.
For the scale in the pipeline, it is best to treat the tap water.
(3) Regular inspection of safety valves
Condensers and evaporators of industrial chillers belong to pressure vessels. According to the regulations, they should be at the high pressure end of the chiller.
The condenser body is equipped with a safety valve, which can automatically release the pressure once the unit is in an abnormal working environment.
In order to prevent the harm that high pressure may cause to human body.
(4) Change the lubricating oil regularly.
After long-term use of industrial chillers, the oil quality of lubricating oil will deteriorate, and impurities and moisture in the oil will increase, so it is necessary.
Regularly observe and check the oil quality. Once the problem is found, it should be replaced in time, and the replaced lubricant brand is best provided by the original manufacturer.
Obey.
(5) Replace the drying filter regularly.
Drying filter is an important part to ensure the normal circulation of refrigerant. Because water and refrigerant are immiscible, if
The water in the system will greatly affect the operation efficiency of the chiller, so it is very important to keep the system dry.
The filter element in the dry filter must be replaced regularly.
Five simple steps to make your industrial cooler look brand-new. If daily maintenance is proper, refrigerate in a stable unit.
At the same time, it can also prolong the service life of the chiller! Of course, it is not very good for the maintenance of industrial chillers.
Users, it is recommended to find a professional to operate.
Just look at the instructions.
How to maintain the chiller? Hello, can you see where your cooler is damaged? There is a corresponding correct maintenance method. Shenzhen Tong Ling chiller