What are the considerations for using R410A refrigerant?

2019 - 03 - 18 refrigerant r410a is a new kind of environmental protection, not destruction of the ozone layer, cooling or heating time, the working pressure for the common R22 air conditioner 1. Refrigeration (about 6 times, Warm) More efficient. To introduce the use of refrigerant R410A under considerations. 1 is higher than that of R22, R410A refrigerant pressure about 1. About 6 times. When installing a R410A refrigerant air conditioning, using R410A special tools and materials, pay attention to safety operation. 2, mixed with the non-condensable gas such as air, will lead to abnormal high pressure refrigerant circulation pipeline, the circulation line is the main cause of fracture, crack. 3, when installing a yituo more air conditioning, due to the volume of the refrigerant sealed more, especially in the small room for installation, even one thousand refrigerant leakage occurs, its concentration cannot exceed the specified value. Otherwise, will cause the phenomenon of hypoxia. 4, in the use of R410A refrigerant in household air conditioner, absolutely cannot use refrigerant R410A. In using R22 refrigerant air conditioner, also absolutely cannot use R410A refrigerant. 5, because is a kind of approximate azeotropic mixture refrigerant R410A, when add refrigerant, using liquid way add. ( When using gas way to add refrigerant composition change, lead to changes in the characteristics of air conditioning also. ) 6, the copper pipe wall thickness, to comply with the copper piping design code 'regulation, according to the requirements of the following allows the use of copper pipe wall thickness, choose R410A for wall thickness of 0. 7 mm brass and copper aluminum tube, absolutely can't use! Seven, refrigerant leakage, if you can make sure the remaining refrigerant mixed with no condensate gas, liquid filling can be directly. The same set of machine this method can only be used three times. 8, R410A refrigerant air conditioner installation emptying requirements ( New refrigerant air conditioning installation, it must be empty, otherwise the air in the system will react with frozen oil, frozen oil properties) 。 High pressure valve normally closed, vacuum time must reach more than 10 minutes, guarantee the pressure reading is below - 0. 1 mpa or - 76 cmhg。 9, R22 refrigerant R410A refrigerant and compressor oil is not the same. R22 used engine oil is: mineral oil. R410A used engine oil is: synthetic oil POE or PVE. R410A refrigerant absolutely cannot use mineral oil. 10, R22 system compared with R410A special parts, compressors, R410A system must use R410A compressor, stop valve, four-way valve. The rest of the parts under the condition of meet the pressure can and general 11 R22, please don't and other cold media, freezing oil. R410A special tools are mainly in the aspect of after-sales service, and the use of other refrigerant air conditioning, don't mix. 12, due to the use of other refrigerant as before, vulnerable to moisture, oxidation layer, grease, etc. The influence of impurity content, therefore, sufficient attention should be paid during operation, use clean pipe, prevent moisture, etc. 13, from the perspective of protection of atmospheric environment, you need to use the vacuum pump. 15, since is a kind of approximate azeotropic mixture refrigerant R410A, HFC - it is 32 and HFC - 125 almost azeotropic binary mixture, its floating temperature below zero. 2℃。 R410A in refrigeration and air conditioning systems will not occur significant separation, which will not change the composition of refrigerant due to leak, so in the process of after-sales maintenance add, don't need to discharge off the rest of the refrigerant in the system. 16, R410 its excellent thermodynamic properties can be used more compact compressor, the smaller the diameter of the tube, and a higher speed and more efficient equipment, because it has lower energy loss. 17, R410A is compatible with mineral oil, or oil alkyl benzene, because R410A won't mix with them. The specified for R410A oil polyols ( 坡) Oil. The oil should not be exposed in the open air, and can only be opened before use.

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