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505367M 04/08
Table 6. HFC−410A Temperature (°F) − Pressure (Psig)
°F Psig °F Psig °F Psig °F Psig °F Psig °F Psig °F Psig °F Psig
32 100.8 48 137.1 63 178.5 79 231.6 94 290.8 110 365.0
125 445.9
141 545.6
33 102.9 49 139.6 64 181.6 80 235.3 95 295.1 111 370.0 126 451.8 142 552.3
34 105.0 50 142.2 65 184.3 81 239.0 96 299.4 112 375.1 127 457.6 143 559.1
35 107.1 51 144.8 66 187.7 82 242.7 97 303.8 113 380.2 128 463.5 144 565.9
36 109.2 52 147.4 67 190.9 83 246.5 98 308.2 114 385.4 129 469.5 145 572.8
37 111.4 53 150.1 68 194.1 84 250.3 99 312.7 115 390.7 130 475.6 146 579.8
38 113.6 54 152.8 69 197.3 85 254.1 100 317.2 116 396.0 131 481.6 147 586.8
39 115.8 55 155.5 70 200.6 86 258.0 101 321.8 117 401.3 132 487.8 148 593.8
40 118.0 56 158.2 71 203.9 87 262.0 102 326.4 118 406.7 133 494.0 149 601.0
41 120.3 57 161.0 72 207.2 88 266.0 103 331.0 119 412.2 134 500.2 150 608.1
42 122.6 58 163.9 73 210.6 89 270.0 104 335.7 120 417.7 135 506.5 151 615.4
43 125.0 59 166.7 74 214.0 90 274.1 105 340.5 121 423.2 136 512.9 152 622.7
44 127.3 60 169.6 75 217.4 91 278.2 106 345.3 122 428.8 137 519.3 153 630.1
45 129.7 61 172.6 76 220.9 92 282.3 107 350.1 123 434.5 138 525.8 154 637.5
46 132.2 62 175.4 77 224.4 93 286.5 108 355.0 124 440.2 139 532.4 155 645.0
47 134.6 78 228.0 109 360.0 140 539.0
Table 7. Normal Operating Pressures (Liquid +10 and Suction +5 psig)
IMPORTANT
Use this table to perform maintenance checks; it is not a procedure for charg-
ing the system. Minor variations in these pressures may be due to differences
in installations. Significant deviations could mean that the system is not prop-
erly charged or that a problem exists with some component in the system.
Model −018 −024 −030 −036 −042 −048 −060
**Temp.
5F (5C)
*Liquid Line Pressure / Vapor Line Pressure
Liquid / Vapor Liquid / Vapor Liquid / Vapor Liquid / Vapor Liquid / Vapor Liquid / Vapor Liquid / Vapor
Expansion Valve (TXV)
65 (18) 230 / 138 233 / 138 230 / 136 240 / 137 236 / 138 238 / 136 239 / 133
70 (21) 244 / 139 250 / 138 247 / 137 259 / 138 253 / 140 256 / 138 258 / 135
75 (24) 265 / 140 271 / 140 265 / 139 278 / 139 273 / 141 277 / 139 278 / 136
80 (27) 286 / 140 291 / 141 287 / 140 299 / 139 296 / 142 299 / 140 300 / 137
85 (29) 307 / 142 313 / 143 308 / 141 321 / 140 318 / 143 320 / 139 323 / 138
90 (32) 330 / 143 335 / 143 331 / 142 344 / 141 341 / 144 343 / 140 346 / 139
95 (35) 351 / 144 361 / 145 355 / 144 368 / 142 366 / 146 369 / 141 370 / 140
100 (38) 380 / 144 384 / 146 380 / 145 393 / 143 392 / 147 395 / 142 396 / 142
105 (41) 407 / 145 412 / 147 405 / 146 419 / 144 417 / 148 422 / 144 415 / 143
110 (43) 436 / 146 436 / 148 432 / 147 446 / 145 445 / 149 450 / 146 449 / 145
115 (45) 466 / 147 468 / 149 461 / 148 477 / 146 475 / 151 481 / 148 476 / 147
Fixed Orifice (RFC)
65 (18) 232 / 124 230 / 121 231 / 123 234 / 130 248 / 135 240 / 126 244 / 125
70 (21) 248 / 127 251 / 128 249 / 127 247 / 134 266 / 138 260 / 129 263 / 128
75 (24) 267 / 131 272 / 133 270 / 132 270 / 136 285 / 141 281 / 133 281 / 131
80 (27) 286 / 135 289 / 135 291 / 136 290 / 138 305 / 143 301 / 135 303 / 134
85 (29) 307 / 138 312 / 140 314 / 140 313 / 141 327 / 145 324 / 138 324 / 136
90 (32) 328 / 141 335 / 142 337 / 142 336 / 143 349 / 147 346 / 140 347 / 139
95 (35) 351 / 143 361 / 144 359 / 144 358 / 145 372 / 149 371 / 142 370 / 141
100 (38) 375 / 146 383 / 147 383 / 146 361 / 148 396 / 150 395 / 144 394 / 143
105 (41) 400 / 148 409 / 149 408 / 147 409 / 150 421 / 152 420 / 146 418 / 145
110 (43) 426 / 150 441 / 151 433 / 149 430 / 151 447 / 153 447 / 148 444 / 146
115 (46) 457 / 153 467 / 152 467 / 151 463 / 152 476 / 154 473 / 150 471 / 147
*Values shown are typical pressures; indoor unit match up, indoor air quality equipment, and indoor load will cause the pressures to vary.
**Temperature of the air entering the outside coil.
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