Lennox XC14 Installation Instructions Manual page 22

°F Psig °F Psig
32 100.8 48 137.1
33 102.9 49 139.6
34 105.0 50 142.2
35 107.1 51 144.8
36 109.2 52 147.4
37 111.4 53 150.1
38 113.6 54 152.8
39 115.8 55 155.5
40 118.0 56 158.2
41 120.3 57 161.0
42 122.6 58 163.9
43 125.0 59 166.7
44 127.3 60 169.6
45 129.7 61 172.6
46 132.2 62 175.4
47 134.6
Table 7. Normal Operating Pressures (Liquid +10 and Suction +5 psig)
IMPORTANT
Model −018
**Temp.
5F (5C)
Liquid / Vapor
Expansion Valve (TXV)
65 (18) 230 / 138
70 (21) 244 / 139
75 (24) 265 / 140
80 (27) 286 / 140
85 (29) 307 / 142
90 (32) 330 / 143
95 (35) 351 / 144
100 (38) 380 / 144
105 (41) 407 / 145
110 (43) 436 / 146
115 (45) 466 / 147
Fixed Orifice (RFC)
65 (18) 232 / 124
70 (21) 248 / 127
75 (24) 267 / 131
80 (27) 286 / 135
85 (29) 307 / 138
90 (32) 328 / 141
95 (35) 351 / 143
100 (38) 375 / 146
105 (41) 400 / 148
110 (43) 426 / 150
115 (46) 457 / 153
*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.
505367M 04/08
Table 6. HFC−410A Temperature (°F) − Pressure (Psig)
°F Psig °F
63 178.5 79
64 181.6 80
65 184.3 81
66 187.7 82
67 190.9 83
68 194.1 84
69 197.3 85
70 200.6 86
71 203.9 87
72 207.2 88
73 210.6 89
74 214.0 90
75 217.4 91
76 220.9 92
77 224.4 93
78 228.0
Use this table to perform maintenance checks; it is not a procedure for charg-
ing the system. Minor variations in these pressures may be due to differences
in installations. Significant deviations could mean that the system is not prop-
erly charged or that a problem exists with some component in the system.
−024 −030
*Liquid Line Pressure / Vapor Line Pressure
Liquid / Vapor Liquid / Vapor
233 / 138 230 / 136
250 / 138 247 / 137
271 / 140 265 / 139
291 / 141 287 / 140
313 / 143 308 / 141
335 / 143 331 / 142
361 / 145 355 / 144
384 / 146 380 / 145
412 / 147 405 / 146
436 / 148 432 / 147
468 / 149 461 / 148
230 / 121 231 / 123
251 / 128 249 / 127
272 / 133 270 / 132
289 / 135 291 / 136
312 / 140 314 / 140
335 / 142 337 / 142
361 / 144 359 / 144
383 / 147 383 / 146
409 / 149 408 / 147
441 / 151 433 / 149
467 / 152 467 / 151
Psig °F Psig °F
231.6 94 290.8 110
235.3 95 295.1 111
239.0 96 299.4 112
242.7 97 303.8 113
246.5 98 308.2 114
250.3 99 312.7 115
254.1 100 317.2 116
258.0 101 321.8 117
262.0 102 326.4 118
266.0 103 331.0 119
270.0 104 335.7 120
274.1 105 340.5 121
278.2 106 345.3 122
282.3 107 350.1 123
286.5 108 355.0 124
109 360.0
−036
Liquid / Vapor Liquid / Vapor
240 / 137 236 / 138
259 / 138 253 / 140
278 / 139 273 / 141
299 / 139 296 / 142
321 / 140 318 / 143
344 / 141 341 / 144
368 / 142 366 / 146
393 / 143 392 / 147
419 / 144 417 / 148
446 / 145 445 / 149
477 / 146 475 / 151
234 / 130 248 / 135
247 / 134 266 / 138
270 / 136 285 / 141
290 / 138 305 / 143
313 / 141 327 / 145
336 / 143 349 / 147
358 / 145 372 / 149
361 / 148 396 / 150
409 / 150 421 / 152
430 / 151 447 / 153
463 / 152 476 / 154
Page 22
Psig °F Psig
365.0
125 445.9
370.0 126 451.8
375.1 127 457.6
380.2 128 463.5
385.4 129 469.5
390.7 130 475.6
396.0 131 481.6
401.3 132 487.8
406.7 133 494.0
412.2 134 500.2
417.7 135 506.5
423.2 136 512.9
428.8 137 519.3
434.5 138 525.8
440.2 139 532.4
140 539.0
−042 −048
Liquid / Vapor
238 / 136
256 / 138
277 / 139
299 / 140
320 / 139
343 / 140
369 / 141
395 / 142
422 / 144
450 / 146
481 / 148
240 / 126
260 / 129
281 / 133
301 / 135
324 / 138
346 / 140
371 / 142
395 / 144
420 / 146
447 / 148
473 / 150
°F Psig
141 545.6
142 552.3
143 559.1
144 565.9
145 572.8
146 579.8
147 586.8
148 593.8
149 601.0
150 608.1
151 615.4
152 622.7
153 630.1
154 637.5
155 645.0
−060
Liquid / Vapor
239 / 133
258 / 135
278 / 136
300 / 137
323 / 138
346 / 139
370 / 140
396 / 142
415 / 143
449 / 145
476 / 147
244 / 125
263 / 128
281 / 131
303 / 134
324 / 136
347 / 139
370 / 141
394 / 143
418 / 145
444 / 146
471 / 147