Gaz RS-50 (R442A)
- What is RS-50?
RS-50 (R442A) is a low GWP HFC substitute for R404A, R507 and R22 for most variable-expansion applications.
- What are the components of RS-50, R407A, R407F
These 3 fluids have a similar shift (between 4.3 and 4.6)
Their PRG is also close, between 1824 and 2107 for the R407A.
- Why does the RS-50 contain R227ea and R152a?
The proportion of R227ea and R152a added in the RS-50, allows a complete and more stable solubility of oils in liquid and gaseous phase, but also increases the performance especially at low temperatures. Indeed, good miscibility increases the efficiency of refrigeration systems. Thus the oil will not stagnate in the exchangers as in the evaporators especially at low temperatures. Thermal exchanges will be better if no film of oil can be created on the walls.
This is one of the reasons for the highest performance of the RS-50 on all other current substitutes.
- Can the RS-50 be used with R404A and R507 lubricants?
Yes. It is completely compatible with commonly used synthetic polyolester oils (POE).
- Can RS-50 be used with R22 mineral lubricant?
No, RS-50 is not with mineral and alkylbenzene oils that can be used with R22. A complete change of the oils to a POE is necessary in case of replacement of the R22 by the RS-50.
- What are the main advantages of the RS-50?
The RS-50 has a much higher coefficient of performance than the R404A and R507 at low temperatures, which provides enormous energy savings for users. The carbon footprint is further reduced by the 1888 PRG (GWP), which is ½ of the R404A.
- Is the RS-50 suitable for new installations?
The RS-50's goal is to replace the R404A and R507 in new equipment in order to benefit from its superior energy efficiency and low GWP.
- Does the RS-50 have an ASHRAE rating and what is its rating?
Yes. RS-50 has been classified ASHRAE R442A with a classification of A1, which is low toxicity and non-flammable under all fractionation conditions.
- Is RS-50 approved by compressor manufacturers?
The individual components that make up RS-50 are widely used in all compressors produced by major manufacturers.
- What is the performance of the RS-50?
The tests showed a significantly higher COP of the RS-50 compared to the R404A and R507, which results in significant energy savings for users.
- What are the results of the comparative tests?
Tests conducted by independent laboratories have shown that RS-50 has higher energy yields than R404A R507 R407A and R407F at low temperatures.
- Should RS-50 be charged in liquid or gaseous form?
As the RS-50 is a mixture, the recommendation is to load it into the system in liquid form. However, if the entire contents of the bottle are being charged, the end-of-charge vapor is acceptable.
- Is the RS-50 on the Significant New Alternative Policy Program (SNAP) in the US list?
Yes
- What is the nominal pressure of RS-50 compared to R22. R404A and R507?
The discharge pressure of the RS-50 is similar to R404A and R507, and higher than R22.
- What is the capacity of RS-50 compared to R404A and R507?
The capacity of the RS-50 is higher than the R404A and R507, with a faster temperature drop.
- What is the RS-50 temperature curve compared to R22, R404A and R507?
The discharge temperatures of RS-50 are lower than those of R22 and higher than R404A and R507.
- What are the flammability characteristics of RS-50?
RS-50 is non-flammable at room temperature and atmospheric pressure and has the same A1 classification as R12, R134a, R404A, R409A (FX56), R507 (AZ-50), etc.
- What are the decomposition products resulting from the combustion of RS-50?
The decomposition products of RS-50 subjected to a high temperature source are similar to those of R404A and R507. The decomposition products in each case are irritating and toxic, and the respirator should be worn when the possibility of exposure exists. (see safety sheet).
- Are there any special precautions with RS-50?
There are no special precautions that must be taken with the RS-50. As with all refrigerants, common sense and good maintenance are always recommended.
- Is the RS-50 compatible with refrigeration and air conditioning systems designed for R404A, R507 R22?
Yes. The RS-50 is compatible with all materials commonly used in systems that have been designed and loaded with R404A, R507 and R22. Thus, the presence of ma-gnesium and zinc alloys should be avoided.
- Can RS-50 be recovered and recycled?
Yes. RS-50 can be recovered and reused after a clean-up and reconditioning operation.
- What technical guidelines do you recommend when switching from R404A or R507 to RS-50?
Use the same type of polyester lubricant, change the filter drier and recover the original fluid and reload the system with 10% less fluid. Finally adjust or change the trigger with a 40% lower valve.
- What technical guidelines do you recommend when going from R22 to RS-50?
If a mineral oil or alkylbenzene is still used, as often with R22, it is necessary to change it with a miscible oil, such as a polyolester. Please get closer to the compressor manufacturer to use the correct type and viscosity. The residual amount of initial oil must not exceed 5%.
Recover the original fluid and reload the installation with 10% less fluid. Change the filter drier. Finally, since the mass flow rate of the RS-50 is the same as the R22, it is not necessary to replace the regulator, however the superheat must be checked and the TXV trigger adjusted if necessary.
- Is the RS-50 compatible with the pipes, gaskets and o-rings used with the R22?
The RS-50 (R442A) is compatible with materials commonly used in refrigeration systems previously loaded with R22. In general, materials that are compatible with R22 can be used with an RS-50 (R442A) interface. It is recommended to check the equipment manufacturers 'retrofit documentation and to obtain equipment manufacturers' recommendations regarding material compatibility. In the early R22 operating systems, replacement of some seals may be required due to the different composition of the RS-50 (R442A) which contains HFCs.
- What is the COP of RS-50 compared to R404A and R507?
Independent tests show that the RS-50 offers a much higher COP than R404A and R507 at low temperatures.
- What is the RS-50 specification?
The RS-50 complies with ARI 700 refrigerant specifications for fluorocarbon refrigerants.
- What is the effect of high exposure by inhalation of RS-50?
As with all CFCs, HCFCs and HFCs, high exposure to RS-50 can produce anesthetic effects. Very high exposures may cause heart rhythm abnormalities as is the case with all CFCs, HCFCs and HFCs.
- What is the flash point, explosive and flammability limits, auto-ignition temperature of the RS-50?
RS-50 is non-flammable as defined in the ASHRAE EN 681-09 tests, and therefore has no flash point or explosion limit. The self-ignition temperature of RS-50 has not been determined, but should be above 750 ° C.
- What are the consequences of a major leak of RS-50?
As with other HFC refrigerants, the area must be evacuated immediately. Vapors may concentrate at ground level and be slow to evacuate if ventilation is insufficient.
- What type of leak detector should be used with the RS-50?
The leak detectors used with HFCs are suitable for use with RS-50.
RS-50 (R442A) is a low GWP HFC substitute for R404A, R507 and R22 for most variable-expansion applications.
- What are the components of RS-50, R407A, R407F
These 3 fluids have a similar shift (between 4.3 and 4.6)
Their PRG is also close, between 1824 and 2107 for the R407A.
- Why does the RS-50 contain R227ea and R152a?
The proportion of R227ea and R152a added in the RS-50, allows a complete and more stable solubility of oils in liquid and gaseous phase, but also increases the performance especially at low temperatures. Indeed, good miscibility increases the efficiency of refrigeration systems. Thus the oil will not stagnate in the exchangers as in the evaporators especially at low temperatures. Thermal exchanges will be better if no film of oil can be created on the walls.
This is one of the reasons for the highest performance of the RS-50 on all other current substitutes.
- Can the RS-50 be used with R404A and R507 lubricants?
Yes. It is completely compatible with commonly used synthetic polyolester oils (POE).
- Can RS-50 be used with R22 mineral lubricant?
No, RS-50 is not with mineral and alkylbenzene oils that can be used with R22. A complete change of the oils to a POE is necessary in case of replacement of the R22 by the RS-50.
- What are the main advantages of the RS-50?
The RS-50 has a much higher coefficient of performance than the R404A and R507 at low temperatures, which provides enormous energy savings for users. The carbon footprint is further reduced by the 1888 PRG (GWP), which is ½ of the R404A.
- Is the RS-50 suitable for new installations?
The RS-50's goal is to replace the R404A and R507 in new equipment in order to benefit from its superior energy efficiency and low GWP.
- Does the RS-50 have an ASHRAE rating and what is its rating?
Yes. RS-50 has been classified ASHRAE R442A with a classification of A1, which is low toxicity and non-flammable under all fractionation conditions.
- Is RS-50 approved by compressor manufacturers?
The individual components that make up RS-50 are widely used in all compressors produced by major manufacturers.
- What is the performance of the RS-50?
The tests showed a significantly higher COP of the RS-50 compared to the R404A and R507, which results in significant energy savings for users.
- What are the results of the comparative tests?
Tests conducted by independent laboratories have shown that RS-50 has higher energy yields than R404A R507 R407A and R407F at low temperatures.
- Should RS-50 be charged in liquid or gaseous form?
As the RS-50 is a mixture, the recommendation is to load it into the system in liquid form. However, if the entire contents of the bottle are being charged, the end-of-charge vapor is acceptable.
- Is the RS-50 on the Significant New Alternative Policy Program (SNAP) in the US list?
Yes
- What is the nominal pressure of RS-50 compared to R22. R404A and R507?
The discharge pressure of the RS-50 is similar to R404A and R507, and higher than R22.
- What is the capacity of RS-50 compared to R404A and R507?
The capacity of the RS-50 is higher than the R404A and R507, with a faster temperature drop.
- What is the RS-50 temperature curve compared to R22, R404A and R507?
The discharge temperatures of RS-50 are lower than those of R22 and higher than R404A and R507.
- What are the flammability characteristics of RS-50?
RS-50 is non-flammable at room temperature and atmospheric pressure and has the same A1 classification as R12, R134a, R404A, R409A (FX56), R507 (AZ-50), etc.
- What are the decomposition products resulting from the combustion of RS-50?
The decomposition products of RS-50 subjected to a high temperature source are similar to those of R404A and R507. The decomposition products in each case are irritating and toxic, and the respirator should be worn when the possibility of exposure exists. (see safety sheet).
- Are there any special precautions with RS-50?
There are no special precautions that must be taken with the RS-50. As with all refrigerants, common sense and good maintenance are always recommended.
- Is the RS-50 compatible with refrigeration and air conditioning systems designed for R404A, R507 R22?
Yes. The RS-50 is compatible with all materials commonly used in systems that have been designed and loaded with R404A, R507 and R22. Thus, the presence of ma-gnesium and zinc alloys should be avoided.
- Can RS-50 be recovered and recycled?
Yes. RS-50 can be recovered and reused after a clean-up and reconditioning operation.
- What technical guidelines do you recommend when switching from R404A or R507 to RS-50?
Use the same type of polyester lubricant, change the filter drier and recover the original fluid and reload the system with 10% less fluid. Finally adjust or change the trigger with a 40% lower valve.
- What technical guidelines do you recommend when going from R22 to RS-50?
If a mineral oil or alkylbenzene is still used, as often with R22, it is necessary to change it with a miscible oil, such as a polyolester. Please get closer to the compressor manufacturer to use the correct type and viscosity. The residual amount of initial oil must not exceed 5%.
Recover the original fluid and reload the installation with 10% less fluid. Change the filter drier. Finally, since the mass flow rate of the RS-50 is the same as the R22, it is not necessary to replace the regulator, however the superheat must be checked and the TXV trigger adjusted if necessary.
- Is the RS-50 compatible with the pipes, gaskets and o-rings used with the R22?
The RS-50 (R442A) is compatible with materials commonly used in refrigeration systems previously loaded with R22. In general, materials that are compatible with R22 can be used with an RS-50 (R442A) interface. It is recommended to check the equipment manufacturers 'retrofit documentation and to obtain equipment manufacturers' recommendations regarding material compatibility. In the early R22 operating systems, replacement of some seals may be required due to the different composition of the RS-50 (R442A) which contains HFCs.
- What is the COP of RS-50 compared to R404A and R507?
Independent tests show that the RS-50 offers a much higher COP than R404A and R507 at low temperatures.
- What is the RS-50 specification?
The RS-50 complies with ARI 700 refrigerant specifications for fluorocarbon refrigerants.
- What is the effect of high exposure by inhalation of RS-50?
As with all CFCs, HCFCs and HFCs, high exposure to RS-50 can produce anesthetic effects. Very high exposures may cause heart rhythm abnormalities as is the case with all CFCs, HCFCs and HFCs.
- What is the flash point, explosive and flammability limits, auto-ignition temperature of the RS-50?
RS-50 is non-flammable as defined in the ASHRAE EN 681-09 tests, and therefore has no flash point or explosion limit. The self-ignition temperature of RS-50 has not been determined, but should be above 750 ° C.
- What are the consequences of a major leak of RS-50?
As with other HFC refrigerants, the area must be evacuated immediately. Vapors may concentrate at ground level and be slow to evacuate if ventilation is insufficient.
- What type of leak detector should be used with the RS-50?
The leak detectors used with HFCs are suitable for use with RS-50.
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