What are the common problems with r404a refrigerant?[]

Q: Is it necessary to vent the r404a refrigerant when replacing it?

Answer: R404a is a mixed refrigerant, it must be vacuumed before filling. Otherwise, the mixing ratio will change, the effect will not be achieved, and the equipment will even be damaged.

Q: What is the difference between R22 and R404A?

Answer: A member of the R22 Freon family. The physics teacher said that it will destroy the ozone layer. It is rarely used in developed countries. China will also completely phase out the use of it in 2030. The price is definitely cheaper than R404A. .

R404A (an environmentally friendly refrigerant) is one of the most common industry standard refrigerants to replace Freon R22 in newly installed refrigeration equipment. It should be noted that if you need to add or replace the refrigerant R22, R404A can not be replaced by blood replacement.

Q: Is r404a refrigerant flammable?

Answer: Not combustible. R404A is a non-azeotropic mixed refrigerant without chlorine. It is a colorless gas at room temperature and pressure. It is a compressed liquefied gas stored in a steel cylinder. Its ODP is 0, so R404A is an environmentally friendly refrigerant that does not destroy the ozone layer of the atmosphere. Main application: R404A is mainly used to replace R22 and R502. It has the characteristics of cleanliness, low toxicity, non-combustibility, and good cooling effect. It is widely used in medium and low temperature refrigeration systems.

Q: Does r404a refrigerant contain fluorine?

Answer: DuPont R404A refrigerant is an environmentally friendly refrigerant, suitable for low-temperature refrigeration.

Q: What is the working low pressure of R404 for refrigerator refrigerant?

Answer: It is normal that the working low pressure of R404 for refrigerator refrigerant is in the range of 4-6. R404A is a mixture of HFC125, HFC-134a and HFC-143. It is a colorless gas at room temperature and a colorless and transparent liquid under its own pressure. R-404A is suitable for new commercial refrigeration equipment at medium and low temperatures and transportation refrigeration. Equipment or update equipment. Closest to the operation of R-502, it can even reach 15°F (-9.4°C) or colder. This refrigerant is suitable for all environments where R-502 can operate normally.

Q: Are 134a and 404a refrigerants interchangeable?

A: Both of these two presses use synthetic oil, the oil is no problem. But the characteristics of R134Ag and R40A are still quite different. The operating pressure of R404 is much higher than that of R134A, and the same is 50 degrees. The condensation temperature of R404A is 22.9Bar, and the pressure of R134A is 13bar. The refrigeration capacity per unit volume of R404A is less than that of R134A, about 1.4 times. That is to say, if your system compressor does not change, after replacing the original R134A with R404A, the compressor discharges The cooling capacity remains the same, but the cooling capacity is 40% larger, so the original two units are too small, so the system cannot work properly. Conversely, if the original R404A is replaced by R134A, the cooling capacity is about 60%. , The system can run, and there is no major security problem.

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