Refrigerants; General Information; R410A; R452B - Danfoss DSH090 Application Manual

Scroll compressors, DSH090 to DSH600 | Refrigerants

Refrigerants

General Information

When choosing a refrigerant, different aspects must be taken into consideration:
• Legislation (now and in the future)
• Safety
• Application envelope in relation to expected running conditions
• Compressor capacity and efficiency
• Compressor manufacturer recommendations & Guidelines
Additional points could influence the final choice:
• Environmental considerations
• Standardisation of refrigerants and lubricants
• Refrigerant cost
• Refrigerant availability

R410A

R410A is a HFC blend (R32: 50%; R125: 50%) with a zero Ozone Depletion Potential (ODP=0) and a Global Warming
Potential of 1924/AR5 (2088/AR4). It is a near-azeotropic mixture with a temperature glide less than 0.2 K.
With its high net refrigeration effect coupled to a high density, the R410A has appeared in last decade to be the
preferred refrigerant for use in commercial air conditioners and heat pumps.

R452B

R452B is a HFO/HFC blend (R32: 67%; R125: 7%; R1234yf: 26%) with a zero Ozone Depletion Potential(ODP=0) and a
low Global Warming Potential (GWP: 676/AR5 ; 698/AR4). It is a near-azeotropic mixture with a temperature glide
around 1 K.
R452B has very close capacities versus R410A and due to its very limited discharge temperature difference it
appears today as the best candidate for a direct drop in of R410A.
R452B is classified A2L with low flammability properties. Please refer to European regulations and directives about
the use of refrigerant of the A2L safety group ( EN378, EN60335). Outside Europe refer to the local regulation.

R454B

R454B is a HFO/HFC blend (R32 :68.9%; R1234yf: 31.1%) with a zero Ozone Depletion Potential (ODP=0) and a low
Global Warming Potential (GWP: 467/AR5; 466/AR4). It is a near-azeotropic mixture with a temperature glide around
1 K.
R454B has very close match to R410A in terms of capacity and discharge temperature difference, and it offers better
efficiencies compared to R410A.
R454B is classified A2L with low flammability properties. Please refer to European regulations and directives about
the use of refrigerant of the A2L safety group (EN378, EN60335). Outside Europe refer to the local regulation
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