Service And Recovery - Lennox XP13-018 Service Literature

Model −018
Values below are typical pressures; indoor unit match up, indoor air quality equipment, and indoor load will cause the pressures to vary.
Temp ºF (ºC)*
Cooling Operation
65 (18) 228 / 140
75 (24) 265 / 142
85 (29) 311 / 144
95 (35) 350 / 147
105 (41) 402 / 149
115 (45) 458 / 152
Heating Operation
20 (−7) 278 / 67
30 (−1) 294 / 81
40 (4.5) 310 / 96
50 (10) 328 / 116
60 (16) 350 / 135
*Temperature of the air entering the outdoor coil.
V − SERVICE AND RECOVERY
WARNING
Polyol ester (POE) oils used with R−410A refriger-
ant absorb moisture very quickly. It is very impor-
tant that the refrigerant system be kept closed as
much as possible. DO NOT remove line set caps or
service valve stub caps until you are ready to make
connections.
IMPORTANT
Use recovery machine rated for R410 refrigerant.
If the XP13 system must be opened for any kind of service,
such as compressor or drier replacement, you must take
extra precautions to prevent moisture from entering the
system. The following steps will help to minimize the
amount of moisture that enters the system during recovery
of R−410A.
1 − Use a regulator−equipped nitrogen cylinder to break
the system vacuum. Do not exceed 5 psi. The dry nitro-
gen will fill the system, and will help purge any mois-
ture.
XP13 Normal Operating Pressures
−024 −024−2
Liquid Line Pressure / Vapor Line Pressure
232 / 139 240 / 139 245 / 135
268 / 142 277 / 142 284 / 137
317 / 144 319 / 142 328 / 140
366 / 146 362 / 143 377 / 144
412 / 148 419 / 146 429 / 145
464 / 152 474 / 153 486 / 147
267 / 55 285 / 61
283 / 72 300 / 75
299 / 89 312 / 92
315 / 109 329 / 110 324 / 107
331 / 130 342 / 125 341 / 126
Page 13
TABLE 7
−030 −036 −037
251 / 134 237 / 126
292 / 138 276 / 135
339 / 140 320 / 139
392 / 143 370 / 143
443 / 145 423 / 146
508 / 149 486 / 148
278 / 55 285 / 57 316 / 57
294 / 72 295 / 77 331 / 73
307 / 88 304 / 96 342 / 90
331 / 106 355 / 109
361 / 112 376 / 118
2 − Remove the faulty component and quickly seal the sys-
tem (using tape or some other means) to prevent addi-
tional moisture from entering the system.
3 − Do not remove the tape until you are ready to install
new component. Quickly install the replacement com-
ponent.
4 − Evacuate the system to remove any moisture and other
non−condensables.
The XP13 system MUST be checked for moisture any
time the sealed system is opened.
Any moisture not absorbed by the polyol ester oil can be re-
moved by triple evacuation. Moisture that has been ab-
sorbed by the compressor oil can be removed by replacing
the drier.
Evacuation of system only will not remove mois-
ture from oil. Drier must be replaced to eliminate
moisture from POE oil.
−042 −048
239 / 135 244 / 139
277 / 136 283 / 141
321 / 139 318 / 143
379 / 142 369 / 145
423 / 144 420 / 148
484 / 147 484 / 150
309 / 60 277 / 59
325 / 74 291 / 73
336 / 89 294 / 92
355 / 107 323 / 106
376 / 118 350 / 124
IMPORTANT
−060
248 / 129
289 / 131
336 / 132
385 / 133
440 / 136
500 / 140
305 / 59
317 / 72
328 / 85
348 / 105
370 / 127