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Page 29
XP16 SERIES
NORMAL OPERATING PRESSURES
Use the following tables 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.
Typical pressures only, expressed in psig (liquid +/− 10
and vapor +/− 5 psig); matched indoor component (air
handler or coil), indoor air quality, and indoor load will
cause the pressures to vary.
Table 7. Normal Operating Pressures*
Normal Operating Pressures − Cooling
XP16 −024 −036 −048 −060
F
(C)**
Liq Vap Liq Vap Liq Vap Liq Vap
First Stage (Low Capacity) Pressure
65
(18.3)
226 144 220 141 224 143 230 137
75
(23.9)
260 145 254 144 259 143 267 139
85
(29.4)
301 148 295 148 302 147 311 141
95
(35.0)
346 151 340 150 346 149 357 144
105
(40.6)
396 153 389 153 396 152 398 147
115
(46.1)
451 156 444 156 450 155 453 149
Second Stage (High Capacity) Pressure
65
(18.3)
241 140 232 129 238 138 232 131
75
(23.9)
279 142 269 136 278 140 276 133
85
(29.4)
321 144 312 140 321 142 320 136
95
(35.0)
369 146 346 142 372 144 367 138
105
(40.6)
421 148 409 145 424 147 421 141
115
(46.1)
480 151 465 148 481 149 479 144
Normal Operating Pressures − Heating
First Stage (Low Capacity) Pressure
50
(10)
312 112 350 115 336 114 385 108
60
(15.5)
330 130 372 136 363 135 414 126
Second Stage (High Capacity) Pressure
20
(−7.0)
299 64 321 61 289 57 332 59
30
(−1.0)
312 79 347 74 294 69 349 67
40
(4.4)
325 93 367 90 321 80 361 75
50
(10)
344 110 387 110 341 110 383 85
60
(15.5)
358 128 395 131 361 128 425 122
** Temperature of air entering outdoor coil.
TEMPERATURE PRESSURES
Compute subcooling by determining saturated
condensing temperature from temperature pressure
chart. Subtract from liquid temperature entering TXV.
Table 8. HFC−410A Temperature (°F) −
Pressure (Psig)
°F Psig °F Psig °F Psig °F Psig
32 100.8 63 178.5 94 290.8 125 445.9
33 102.9 64 181.6 95 295.1 126 451.8
34 105.0 65 184.3 96 299.4 127 457.6
35 107.1 66 187.7 97 303.8 128 463.5
36 109.2 67 190.9 98 308.2 129 469.5
37 111.4 68 194.1 99 312.7 130 475.6
38 113.6 69 197.3 100 317.2 131 481.6
39 115.8 70 200.6 101 321.8 132 487.8
40 118.0 71 203.9 102 326.4 133 494.0
41 120.3 72 207.2 103 331.0 134 500.2
42 122.6 73 210.6 104 335.7 135 506.5
43 125.0 74 214.0 105 340.5 136 512.9
44 127.3 75 217.4 106 345.3 137 519.3
45 129.7 76 220.9 107 350.1 138 525.8
46 132.2 77 224.4 108 355.0 139 532.4
47 134.6 78 228.0 109 360.0 140 539.0
48 137.1 79 231.6 110 365.0 141 545.6
49 139.6 80 235.3 111 370.0 142 552.3
50 142.2 81 239.0 112 375.1 143 559.1
51 144.8 82 242.7 113 380.2 144 565.9
52 147.4 83 246.5 114 385.4 145 572.8
53 150.1 84 250.3 115 390.7 146 579.8
54 152.8 85 254.1 116 396.0 147 586.8
55 155.5 86 258.0 117 401.3 148 593.8
56 158.2 87 262.0 118 406.7 149 601.0
57 161.0 88 266.0 119 412.2 150 608.1
58 163.9 89 270.0 120 417.7 151 615.4
59 166.7 90 274.1 121 423.2 152 622.7
60 169.6 91 278.2 122 428.8 153 630.1
61 172.6 92 282.3 123 434.5 154 637.5
62 175.4 93 286.5 124 440.2 155 645.0