R-22 AC Retrofit Metrics CaCapacity (%)

COP (%)

+25

+25

+15

+15

+15

+9

Mass Flow (%)

+15

+75

+9

+45

R-422D

R-422B

+5

+5

+3

+3

+15

0

0

0

Discharge T (°F)

+75

+75

+25

+25

+75

+75

+45

+45

+45

+15

+15

+45

+45

+15

+15

+5

+5

+15

+15

R-421A

R-438A

0

Suction P (psi)

+75

+15

R-427A 0

Discharge P (psi)

0

R-422D 0

R-427A R-438A

0

0

0

0

0

R-422D -5

-5 R-427A

-3

R-427A

R-438A R-422B

R-438A

R-421A

-15

-15

R-422B -15

R-421A -15

-5

R-427A

R-422B

R-421A

R-438A -5

-15

-15

-9

-15 R-427A

R-421A

R-438A

R-422D

R-422D -15

-3

-9

-45

-45

-45

-45

-15

-15

-45 R-422D

-15

-75

-75

-75

-75

-25

-25

-75

R-421A

R-422B -45

R-422B

-25

CaCapacity (%)

-25

-15

COP (%)

Mass Flow (%)

* Standard Cycle 105°F Condenser, 25°F Evaporator, 10°F Subcooling & 10°F Superheat

Discharge P (psi)

Suction P (psi)

-75

Discharge T (°F)

n n n n n

R-427A R-421A R-422B R-422D R-438A

CaCapacity (%)

COP (%)

+25

+25

+15

+15

+15

+5

+5

Mass Flow (%)

Discharge P (psi)

+75

+75

+75

+75

+25

+25

+75

+75

+9

+9

+45

+45

+45

+45

+15

+15

+45

+45

+3

+3

+15

+15

+15

+15

+5

+5

+15

+15

0

0

-5

-3

-15

-15

-9

-25

-25

-15

-5

R-427A

CaCapacity (%)

Discharge T (°F)

+15

R-427A 0

Suction P (psi)

R-427A

0

0

-3

-15

-15

-9

-45

-15

-75

COP (%)

0

R-427A

0

0

0

-15

-15

-5

-45

-45

-45

-75

-75

-75

Mass Flow (%)

Discharge P (psi)

0

0

-5

-15

-15

-15

-45

-45

-25

-25

-75

-75

R-427A

Suction P (psi)

0

R-427A

-15

Discharge T (°F)

* Standard Cycle 105°F Condenser, 25°F Evaporator, 10°F Subcooling & 10°F Superheat, Acceptable +/-10% deviation from R-22

Mass Flow of R-22 AC Retrofits

Forane® 427A R-438A (MO-99)

R-422B (NU-22B)

R-421A

R-422D

R-421B

More likely to change TXV 90

100

110

120

130

140 150 Refrigerant Mass Flow Rates (% Relative to R-22)

160

170

180

190

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R-22 AC Retrofit Metrics