WD_2021

AIR CONDITIONER - SYSTEMOPERATION

R-134a Pressure/Temperature Chart - SAE

Condenser: Temperatures are not ambient temperatures. Add to ambient (35°–40°F) for proper heat transfer, then refer to pressure chart. For example: 90˚F ambient temperature + 40°F = 130°F Condenser temperature = 180 PSIG (based on 30 mph air flow)

Evaporator: Pressure (PSIG) represents gas temperatures inside the coil and not the coil surfaces. Add to temperature for coil and air-off temperatures ( 8°–10°F ). Conditions will vary for different system configurations. Refer to manufacturers specifications.

REFERENCE

INFORMATION

PSIG °F 16 16 18 19 20 22 22 25 24 27 26 30 28 32 30 34 32 36 34 39 36 41

PSIG °F 38 44 40 48 42 47 44 49 46 50 48 52 50 54 55 58 60 62 65 66 70 69

PSIG °F 75 73 80 76 85 79 90 82 95 85 100 88 105 91 110 93 115 96 120 98 125 101

PSIG °F 130 103 135 105 140 107 145 110 150 112 160 116 170 120 180 124 190 127 200 131 210 134

PSIG °F 220 137 230 141 240 144 250 147 260 150 270 152 280 155 290 158 300 160 310 163 320 165

PSIG °F 330 168 340 170 350 172 360 175 370 177 380 179 390 181 400 183

Evaporator

Condenser

RD-5-13053-0P Rev–

R-134a Pressure/Temperature Chart - Metric

kPa

°C

kPa

°C

kPa

°C 23 24 26 28 29 31 33 34 36 37 38

kPa 896 931 965 1000 1034 1103 1172 1241 1310 1379 1448

°C 39 41 42 43 44 47 49 51 53 55 57

kPa 1517 1586 1655 1724 1793 1862 1931 1999 2068 2137 2206

°C 58 61 62 64 66 67 68 70 71 73 74

kPa 2275 2344 2413 2482 2551 2620 2689 2758

°C 76 77 78 79 81 82 83 84

110 124 138 152 165 179 193 207 221 234 248

-9 -7 -6 -4 -3 -1

262 276 290 303 317 331 345 379 414 448 483

7 9 8 9

517 552 586 621 655 689 724 758 793 827 862

10 11 12 14 17 19 21

0 1 2 4 5

Condenser

Evaporator

Condenser: Temperatures are not ambient temperatures. Add to ambient (35°–40°F) for proper heat transfer, then refer to pressure chart. For example: 90˚F ambient temperature + 40°F = 130°F Condenser temperature = 180 kPa (based on 30 mph air flow)

Evaporator: Pressure (kPa) represents gas temperatures inside the coil and not the coil surfaces. Add to temperature for coil and air-off temperatures ( 8°–10°F ). Conditions will vary for different system configurations. Refer to manufacturers specifications.

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