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8
Normal Operating Pressures
NOTE: Values provided in chart are typical pressures. Indoor unit matchup, indoor air quality and indoor load will cause pressures to
vary.
Temperature of the Air
Entering the Outdoor Coil
Model
-24 -36 -48 -60
Liquid Suction Liquid Suction Liquid Suction Liquid Suction
Cooling—1st Stage (Low Capacity)
65ºF 232 146 225 144 235 144 225 138
75ºF 264 148 261 147 268 145 264 141
85ºF 307 149 302 149 310 147 305 142
95ºF 353 151 349 151 356 148 352 146
105ºF 403 153 397 153 407 150 405 148
115ºF 460 155 461 157 466 152 459 150
Cooling—2nd Stage (High Capacity)
65ºF 240 143 239 139 244 140 241 134
75ºF 279 145 278 141 283 141 280 136
85ºF 322 147 322 143 326 144 324 137
95ºF 371 149 367 146 374 147 373 138
105ºF 423 151 426 148 427 148 425 142
115ºF 485 154 489 151 491 151 486 146
Heating—1st Stage (Low Capacity)
40ºF 337 93 328 98 369 75 351 63
50ºF 322 117 333 118 366 114 335 92
Heating—2nd Stage (High Capacity)
20º 279 62 296 62 311 58 308 59
30ºF 288 76 309 75 334 72 323 70
40ºF 302 93 322 92 354 89 318 69
50ºF 306 112 336 113 381 108 329 82