Page 9
Pre−Charge Maintenance Checks
1.
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
5
F (
5
C)*
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.
