Page 9
Pre−Charge Maintenance Checks1.
TABLE 2
Normal Operating Pressures (TXV)
IMPORTANT
Use this table to perform maintenance checks; it is not a procedure for charging
the system. Minor variations in these pressures may be due to differences in
installations. Significant deviations could mean that the system is not properly
charged or that a problem exists with some component in the system.
13ACX
−018 −024 −030 −036 −042 −048
−060−1
−060−2
5F (5C)*
Liquid / Vapor Liquid / Vapor Liquid / Vapor Liquid / Vapor Liquid / Vapor Liquid / Vapor
Liquid / Vapor
Liquid / Vapor
Expansion Valve (TXV)
65 (18) 244 / 135 249 / 137 241 / 134 253 / 134 250 / 135 240 / 130 247 / 129 242 / 130
70 (21) 262 / 136 268 / 138 259 / 135 274 / 135 268 / 137 257 / 131 265 / 130 266 / 131
75 (24) 281 / 137 288 / 138 279 / 136 293 / 136 288 / 138 278 / 132 286 / 131 286 / 132
80 (27) 302 / 138 309 / 140 300 / 137 315 / 137 310 / 139 299 / 133 310 / 132 309 / 133
85 (29) 323 / 139 331 / 140 322 / 138 338 / 139 332 / 140 323 / 134 330 / 132 332 / 134
90 (32) 346 / 141 355 / 142 345 / 140 361 / 139 356 / 140 344 / 135 353 / 133 357 / 135
95 (35) 369 / 142 379 / 143 369 / 141 385 / 141 381 / 141 369 / 136 375 / 134 381 / 136
100 (38) 394 / 143 402 / 144 393 / 142 410 / 142 406 / 143 394 / 137 400 / 136 407 / 137
105 (41) 417 / 145 430 / 145 418 / 143 436 / 143 432 / 143 418 / 139 426 / 137 433 / 138
110 (43) 445 / 146 457 / 146 445 / 144 463 / 145 459 / 145 446 / 140 451 / 139 459 / 140
115 (45) 476 / 148 485 / 147 474 / 145 491 / 146 490 / 145 477 / 141 482 / 141 488 / 141
Fixed Orifice (RFC)
65 (18) 244 / 135 244 / 125 243 / 116 252 / 129 250 / 135 248 / 127 248 / 123 255 / 126
70 (21) 262 / 136 263 / 128 262 / 120 271 / 131 268 / 137 266 / 130 269 / 127 274 / 128
75 (24) 281 / 137 282 / 131 283 / 124 290 / 133 288 / 138 284 / 132 295 / 131 294 / 131
80 (27) 302 / 138 303 / 134 305 / 128 312 / 136 310 / 139 305 / 134 315 / 133 317 / 134
85 (29) 323 / 139 326 / 137 328 / 132 334 / 139 332 / 140 325 / 137 334 / 135 339 / 136
90 (32) 346 / 141 347 / 138 351 / 135 356 / 141 356 / 140 347 / 139 359 / 138 362 / 138
95 (35) 369 / 142 372 / 141 376 / 139 380 / 143 381 / 141 371 / 141 384 / 140 386 / 140
100 (38) 394 / 143 396 / 143 401 / 142 405 / 145 406 / 143 394 / 143 409 / 142 413 / 142
105 (41) 417 / 145 421 / 145 427 / 145 429 / 147 432 / 143 418 / 144 434 / 144 435 / 144
110 (43) 445 / 146 449 / 147 454 / 147 456 / 148 459 / 145 445 / 146 462 / 145 462 / 146
115 (46) 476 / 148 479 / 149 482 / 149 483 / 151 490 / 145 472 / 147 489 / 146 490 / 148
*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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