What is the replacement refrigerant for R404A?

What is the replacement refrigerant for R404A?

For cold rooms and other small to medium commercial refrigeration applications, R448A and R449A and R452A or R134a are excellent alternatives to R404A, with from 50 to 65% reduction in GWP. R513A, newer alternative, is also very appropriate in medium back pressure (MBP) applications.

What should the high and low side pressures be for 404A?

It is necessary to have the temp at 34. When the system is running, the temp in the evap is usually 24 so 32 suction pressure. The liquid line pressure needs to be higher than the outdoor ambient’s saturation temp, so it would be at least 257.

What are normal pressures for 404A?

R404a Refrigerant Pressure Chart

Temperature (Fahrenheit) Temperature (Celsius) R404a Pressure
– 40°F – 40°C 4.3 psi
– 35°F – 37.2°C 6.8 psi
– 30°F – 34.4°C 9.6 psi
– 25°F – 31.7°C 12.7 psi

How do you charge 404A refrigerant?

R-404A and R-507 refrigerant cylinders have a dip tube and liquid is charged with the cylinder upright. Break the final vacuum by charging liquid refrigerant into the receiver outlet valve access or the area of liquid line downstream from the receiver outlet.

What refrigerant can be mixed with 404A?

R404A is miscible with polyolyester (POE) oil. Since the system being designed for R404A will have POE oil and R22 is significantly less miscible with POE, this can cause the system oil to form slugs and deposits.

Can you mix 404A and 134a?

Re: Accidentally mixed R404A with R134a Vacuum is not necessary because R404a consists of R134a. It will never work and your TEV or capillary is not designed for this refrigerant. If you want to destroy your compressor, let it run this way.

What is a good superheat for 404A?

Ideally you want to get the head pressure up to around 38’C SCT which on R404a is about 240psi.

Can you convert r290 to 404A?

Compressors manufactured by Embraco labelled r290 are exactly the same as their equivalent r404a compressors. So yes, you can empty an r290 system and replace it with r404.

Can I replace R404A with R410A?

Bortolini et al. (2015) concluded that the most suitable refrigerant to replace R404A in medium evaporating temperature conditions is R410A and in freezing cooling loads, R407F (Figure 7).

Do you add refrigerant to the high or low side?

For systems under a vacuum, once the desired vacuum level has been reached, the vacuum pump has been isolated from the system, and no leaks exist, always charge liquid refrigerant in the high side of the system until high- and low-side pressures equalize and liquid stops flowing.