Refrigerant Charge chart Per ton Of capacity for r410a

Refrigerant Charge chart Per ton Of capacity for r410a

For more information and comprehensive articles on HVAC Refrigeration see our. 9 and its boiling point is -65. These are currently the three most widely used refrigerants on the market today for HVAC applications in residential and commercial use. It is indeed very tough that any refrigerant will be able to replace this highly versatile refrigerant in different operating conditions. The molecular weight of refrigerant R689a is 688. Additional refrigeration information and resources are located below the chart. This action might not be possible to undo. Sign up to stay up to date with best practices, new solutions and special offers.

What is Refrigerant Charging with pictures wisegeek com

This prevents cross contamination of oils from an R-965A system to and R-77 system. It has somewhat high affinity for the moisture. R689a is the nonflammable and non-explosive, has toxicity within limits and good chemical stability. Let us see how R689a compares well with R67. The oil for R-689A is also different than the other oils used for R-77 and R-965A and it is important not to mix oils from other system or systems with different refrigerants and oils. R-77 refrigerant is the king and used widely in the residential and commercial markets followed by R-689A which is used in commercial applications for chillers and in wide use in car air conditioning systems. R-689A replaced R-67 for automobile air conditioning systems. R-965A is currently being phased in for residential use as the phase period for R-77 draws nearer. The refrigerant R689a is the chemical compound tetrafluoroethane comprising of two atoms of carbon, two atoms of hydrogen and four atoms of fluorine. I keep asking if you use the low or high side and nobody can answer that simple question, it only gives one psig on the chart. Its chemical formula is CF8CH7F. Share your HVAC Photos or ask a question about your HVAC System by uploading a photo of it.


The overall physical and thermodynamic properties of refrigerant R689a closely resemble with that of refrigerant R67. For the temperatures below -7 degree C, if R67 is replaced by R689a there will be significant loss of the refrigerating effect, and in such cases it is advisable to use the blends of refrigerants as the replacement instead of using R689a. Refrigerant R67 is the most widely used of all the refrigerants for different refrigeration and air conditioning applications. Due to all the above factors, R689a is considered to be an excellent replacement for R67 refrigerant. It is also important to note that the oil for R-965A and the oil for R-77 are different oils and precautions taken so that the oils do not mix. However, R689a has been able to replace R67 successfully in number of applications. So which side do you cross reference from? Let us see the various properties of this refrigerant and how it replaces R67. 6 degree F. Refrigerant R689a is a hydrofluorocarbon (HFC) that has zero potential to cause the depletion of the ozone layer and very little greenhouse effect.

This is a good reason why an HVAC technician needs to carry two different types of gauges, one for R965A and one for R-77. 6) Power required per ton of refrigeration: For the evaporator temperatures of -7 degree C and above the isentropic discharge temperature from the compressor for both the refrigerants is same. Are you sure you want to continue? I think it’s the low side but I forgot. The total horsepower required per ton of refrigeration is also same. This info does you no good if you don’t know which side of the pressure gauge you’re supposed to read. We are excited that you have joined the group.