Lennox Merit Series 13ACX Installation Instructions Manual page 20

Table 4. HFC−410A Normal Operating Pressures (Liquid +10 and Suction +5 psig)
IMPORTANT
13ACX
−018
5F (5C)*
Liquid / Suction
Expansion Valve (TXV)
65 (18) 233 / 132
70 (21) 251 / 133
75 (24) 265 / 133
80 (27) 292 / 135
85 (29) 314 / 136
90 (32) 338 / 137
95 (35) 362 / 138
100 (38) 388 / 140
105 (41) 415 / 141
110 (43) 444 / 142
115 (45) 475 / 143
Fixed Orifice (RFC)
65 (18) 233 / 121
70 (21) 250 / 124
75 (24) 270 / 128
80 (27) 291 / 131
85 (29) 313 / 134
90 (32) 335 / 136
95 (35) 359 / 138
100 (38) 383 / 140
105 (41) 409 / 142
110 (43) 436 / 145
115 (46) 464 / 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.
506081−01 09/08
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.
−024 −030
Liquid / Suction Liquid / Suction
244 / 137 248 / 127
263 / 138 263 / 131
285 / 139 284 / 132
307 / 140 307 / 134
329 / 141 330 / 135
354 / 142 355 / 136
379 / 143 380 / 137
404 / 144 407 / 138
438 / 145 434 / 139
464 / 147 465 / 141
495 / 148 497 / 142
246 / 126 245 / 123
265 / 129 265 / 126
286 / 132 286 / 129
307 /135 308 / 132
330 / 137 331 / 135
353 / 140 355 / 138
378 / 142 380 / 140
402 / 143 405 / 142
428 / 145 431 / 144
456 / 147 458 / 146
486 / 149 487 / 148
−036 −042
Liquid / Suction Liquid / Suction
263 / 135 238 /132
281 / 138 262 / 133
302 / 140 280 / 134
325 / 142 301 / 136
349 / 142 327 / 137
375 / 143 353 / 138
404 / 144 377 / 140
433 / 145 404 / 141
462 / 147 435 / 142
494 / 149 465 / 143
527 / 150 499 / 144
261 / 134 246 / 126
281 / 136 263 / 128
301 / 138 284 / 131
324 / 140 305 / 133
346 / 142 327 / 135
371 / 144 350 / 138
396 / 146 374 / 140
422 / 148 399 / 142
448 / 150 424 / 144
477 / 151 452 / 146
506 / 153 481 / 148
Page 20
−048 −060
Liquid / Suction Liquid / Suction
235 / 132 241 / 130
254 / 132 260 / 130
276 / 134 280 / 132
298 / 134 299 / 134
323 / 135 321 / 135
350 / 137 344 / 134
377 / 138 371 / 135
406 / 140 400 / 137
430 / 141 428 / 139
464 / 142 458 / 141
495 / 143 484 / 142
247 / 125 248 / 124
266 / 128 266 / 126
286 / 131 288 / 130
307 / 133 309 / 133
329 / 135 330 / 135
353 / 138 354 / 138
377 / 140 377 / 140
403 / 142 406 / 142
428 / 144 431 / 144
455 / 146 457 / 146
483 / 147 484 / 148