Lennox XP14-018-230-06 Nstallation And Service Instructions page 33

Table 8. Normal Operating Pressures - Liquid +10 and Vapor +5 PSIG (XP14-XXX-230-08 or higher)
Use table 8 as a general guide when performing maintenance checks. This is not a procedure for charging the unit (Refer
to Charging / Checking Charge section). Minor variations in these pressures may be expected due to differences in instal­
lations. Significant differences could mean that the system is not properly charged or that a problem exists with some
component in the system.
Model
Heating
Number
ºF (ºC)* 20 30
-018 67 83
-024 58 72
-030 55 69
-036 62 76
-042 58 73
-048 60 75
-060 56 70
ºF (ºC)* 20 30
-018 272 287
-024 281 295
-030 274 286
-036 287 304
-042 293 335
-048 282 299
-060 266 285
*Temperature of the air entering the outside coil.
°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
IMPORTANT
40 50 60 65
100 118 137 145
88 105 123 139
84 102 122 135
91 106 124 135
89 108 130 127
90 105 121 136
84 99 114 132
40 50 60 65
305 321 339 242
309 324 340 243
299 313 327 250
322 342 365 230
368 394 411 215
316 334 353 219
309 337 369 222
Table 9. 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
Vapor Pressure
70 75 80 85
145 146 147 148
140 142 143 144
136 138 140 141
137 139 141 143
129 131 132 134
137 138 139 140
133 134 135 137
Liquid Pressure
70 75 80 85
259 279 302 326
262 281 302 325
268 288 308 330
248 268 288 311
234 254 275 298
237 256 277 298
241 262 283 306
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
Page 33
Cooling
90 95 100 105
149 151 151 153
145 145 146 147
143 144 145 147
145 146 148 150
136 137 139 140
141 142 143 144
138 139 141 142
90 95 100 105
351 376 406 433
348 373 399 426
352 376 400 426
334 359 385 412
321 346 371 398
321 344 369 395
330 354 380 406
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
110 115
154 155
147 148
148 149
151 153
141 142
146 147
143 144
110 115
462 498
454 483
452 480
441 471
426 455
422 450
434 463
°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
XP14 SERIES