Frequently Asked Questions about R410A Refrigerant

1. Question: What should I pay attention to when filling r410a refrigerant?

Answer: Do not mix R410A refrigerant with other refrigerants and refrigerating machine oil. Special tools are mainly used for after-sales service. Unlike air conditioners that use other refrigerants, do not mix them. As the pressure of R410A is relatively high, piping, tools, etc. are all dedicated. Since R410A refrigerant is different from other refrigerants used before, R410A refrigerant is easily affected by impurities such as moisture, oxide layer, grease, etc. Therefore, it is necessary to pay full attention to the use of clean piping to prevent mixing of moisture, etc. during construction operations. Also, be careful not to use piping that has already been used. It is necessary to ensure the use of new piping during installation and construction. During the welding process, ensure that nitrogen is circulated in the pipe while welding. From the perspective of protecting the atmospheric environment, a vacuum pump is needed to vacuum the compressor. Since R410A is an almost azeotropic mixed refrigerant, when adding the refrigerant, use the liquid method to add.

2. Q: Is r410a refrigerant harmful to humans?

Answer: 410a refrigerant is a colorless and odorless mixed refrigerant, non-toxic. However, long-term inhalation of large amounts can cause hypoxia, discomfort and even suffocation.

3. Q: How much is a bottle of r410a refrigerant?

A: The current packaging specifications are: non-reusable cylinder 11.3KG, reusable cylinder 400L/800L/926L/1000L, and tank truck 18T.

4. Q: How much is r410a refrigerant?

Answer: The price of R410a is about twice that of R22, the price of a 10kg bottle is about 400 yuan, and the price of a 22.7kg bottle of R22 is only 400 per can. The price is for reference only, and the price of different packaging and manufacturers will vary depending on the brand.

5. Q: Which brand of R410A refrigerant is better?

Answer: DuPont refrigerant is the best imported one, and the best domestic one is refrigerant. The others are medium-sized products, such as Jin Leng, Sanai Fu, Dongyue, etc. A relatively good brand.

6. Q: How to add refrigerant to R410a air conditioner? How much do you want to add?

Answer: When adding 410a refrigerant, there are mainly the following steps:

　　a. Prepare the R410a refrigerant corresponding to the air-conditioning label, the pressure gauge group, the bifigure meter, the thermometer, Current card meter, etc.

　　b. Connect one end of the hose to the R410 refrigerant cylinder valve, and one end to the middle connector of the Shuangqi meter. Connect the needle valve on the thick pipe valve of the outdoor unit with the low pressure side hose. Before opening the fluorine bottle and the meter valve switch to discharge a little air, and then tighten it.

　　c. Turn on the air conditioner, set the 'refrigeration' function, and set the temperature lower (in winter, fluoride should be set to the lowest, even the temperature control sensor in the indoor unit has to be heated). After the compressor rotates, open the R410 refrigerant bottle valve, turn the fluorine bottle upside down, and open the meter valve again. At this time, the 410A refrigerant has quickly flowed into the blister copper pipe. After a few seconds (not more than ten seconds), close the meter valve, wait for the air conditioner to run for a few minutes, and repeat.

　　d. Touch the thick and thin copper tube of the outdoor unit by hand. The thick tube should feel very cold and condensate appears. The temperature of the tube should be between 5 and 15 degrees Celsius. After adding R410 refrigerant (low pressure in summer) Do not exceed 0.6MPa).

7. Q: What kinds of mixtures are R410A refrigerants?

Answer: R410A is a mixed refrigerant. It is a mixture of R32 (difluoromethane) and R125 (pentafluoroethane). Its advantage is that it can be used according to specific requirements. Various properties, such as flammability, capacity, exhaust temperature and efficiency are considered, and a refrigerant is tailored to be synthesized. R410A is colorless, non-turbid, volatile, boiling point -51.6°C, freezing point -155°C.

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