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REAL Alternatives Module 2 Design Differences for Alternative Refrigerants | 20 3. R32 R32 is very similar to R410A but it is classified as low flammability. Most system components are the same as those used for R410A. The difference is driven by the low flammability: Charge size is limited, see tables 5 and 6 of Module 1 for more See REAL Alternatives information (R32 is currently classified as a group A2 Guide 1, tables 5 and 6 refrigerant); Some electrical components are designed for use in a flammable atmosphere. Appendix 1 provides more detail about the design process for systems which use a flammable refrigerant. This applies to low flammable refrigerants such as R32. R32 operating and standstill pressures are almost identical to those for R410A, so components used must be suitable for those pressures; components used for other HFCs may not be suitable. Typical maximum system pressure (PS) for the high side is 34.2 bar g, and typical PS for the low side is 19.3 bar g The cooling capacity of R32 is similar to R410A, so components sized for R410A should be used. See REAL Alternatives Gude 1, figure 2 Danfoss Refrigerant Slider App Bitzer PT App Type Key facts GWP6 Sat temp7 Typical applications R32 Hydro fluoro carbon, HFC low flammable 675 ‐52OC Split air conditioning 6 GWP is from F Gas Regulation EU 517:2014 7 Sat temp is the saturation temperature at atmospheric pressure (1 bar g), except for R744 where it is the surface temperature of solid R744 at atmospheric pressurePDF Image | Alternative Refrigerants
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