So… what refrigerant can be mixed with R-22? None. You can't mix refrigerants.
Freon MO99 is the closest capacity match to R-22 compared with most other no-oil change refrigerants.
Mixing R22 with R407C or any other refrigerant. According to the 609 EPA rule, mixing refrigerants is illegal and anybody caught doing so will be heavily fined.
Freon™ MO99 can be used to retrofit R-22 heat pumps .
The pressure can become high enough for parts of the system to rupture. At the very least, leaks will occur.
You cannot just switch refrigerants because R410-A and R-22 have different chemical properties. R410-A operates at a higher pressure. If you put R410-A into an R-22 system, the parts will rupture due to the increased force.
As a solution, there are two alternative refrigerants used as substitute refrigerant for R22, namely R290 and R32. The R290 is widely used as working fluid in A/C system of Europe countries; meanwhile in Japan and South East countries, R32 is utilized as substitute refrigerant for R22 and R410A (Yu et al., 2010).
An R-22 Refrigerant Replacement for Direct Expansion Refrigeration. Freon™ MO29 (R-422D) refrigerant is a low-toxicity, non-ozone depleting hydrofluorocarbon (HFC) replacement for R-22.
No, the compressor will fail. These two refrigerants have very different properties. One of R22 and R134a is high pressure and the other is low pressure. They don't mix chemically and don't have the same boiling point, leading to inefficiencies and eventual compressor failure.
Using these retrofit guidelines, many R-22 systems can be retrofitted for use with Freon™ 407C in air conditioning, heat pump applications, and refrigeration applications to allow existing equipment to continue to operate safely and efficiently, even after R-22 is no longer available.
In 2010, the U.S. stopped the sale of newly manufactured residential air conditioning units and heat pumps that use R-22 because of its particularly harmful impact on the ozone layer when released into the air. On January 1, 2020, the U.S. Environmental Protection Agency (EPA) banned the production and import of R-22.
Like oil and water different refrigerants do not mix, so you have different temperatures cycling through your system. This can lead your AC system to overheat and a burnt motor, a costly repair.
No ,R404A works at higher pressure and is much better in absorbing and releasing heat .
So… what refrigerant can be mixed with R-22? None. You can't mix refrigerants.
R22 is being phased out because it harms the ozone and causes global warming. This means less production and use, eventually banning it in new equipment. Switching to alternatives with lower global warming potential can greatly reduce cooling systems' carbon footprint. Old A/C systems often use R22 refrigerant (Freon).
RS-44b: This is a direct replacement to R22 that offers the same flow rate, consumes less energy, and requires no changes to system components.
R134a and R22
The capacity of R134a is smaller than that of R22, and the pressure is lower than that of R22. Due to these features, an R134a air conditioner with the same capacity must be equipped with a larger compressor with a larger evaporator, condenser, and piping.
R-1234yf systems that control freeze protection by pressure may encounter loss of cooling performance if charged with 100% R-134a. This is due to the requirement of R-134a to have a lower setting of 3.3 psig to achieve freeze protection at 32 F. This may result in a 4-degree F.
R417A refrigerant is an HFC mixture that serves as a substitute for R22. It is compatible with traditional lubricants. In most cases, the lubricant type does not need to be changed in the event of retrofitting.
The answer: No. Putting R-410A refrigerant into an AC unit that was designed to use R-22 will cause the unit to die soon after it tries to run.
R-22 is often referred to as Freon, which is actually one of the top brands. R-22 is no longer used for installing new ac systems as it was discontinued in 2010 due to it being a hydro-chlorofluorocarbon (HCFC).
Changes to the Dangerous Goods Legislation, effective in 2021, has new categories for A2L refrigerants. R32 is a synthetic greenhouse gas. If released to the atmosphere it can contribute to climate change. R32 is a flammable refrigerant.
R-22 is an HCFC refrigerant that is often used in air-conditioning equipment. To protect the Earth's protective ozone layer, the United States is phasing out R-22, along with other chemicals.
R470A (RS-53) has been developed to replace R410A in existing installations, although it can also be used in new equipment.