Lennox LCM156U, Installation Instructions Manual

Page: 22 / 48

Page 22
LGM/LCM156, 180, 210, 240, 300
TABLE 10
210 Reheat Compressor 1 Frequency 48Hz - 581019-01
Outdoor
Coil En­
tering
Air
Temp
Circuit 1 Circuit 2 Circuit 3 Circuit 4
Dis
+10
psig
Suc
+5
psig
Dis.
+10
psig
Suc
+5
psig
Dis.
+10
psig
Suc
+5
psig
Dis.
+10
psig
Suc.
+5
psig
65°F 245 127 267 126 241 120 264 141
75°F 279 130 303 129 279 129 301 146
85°F 317 133 344 132 318 136 342 149
95°F 367 136 393 134 365 143 391 152
105°F 407 139 438 138 409 147 438 155
115°F 461 143 492 141 462 151 493 159
TABLE 11
240 Std. Compressor 1 Frequency 62Hz - 581020-01
Outdoor
Coil En­
tering
Air
Temp
Circuit 1 Circuit 2 Circuit 3 Circuit 4
Dis
+10
psig
Suc
+5
psig
Dis.
+10
psig
Suc
+5
psig
Dis.
+10
psig
Suc
+5
psig
Dis.
+10
psig
Suc.
+5
psig
65°F 250 117 261 124 252 129 267 139
75°F 289 121 301 128 292 136 310 146
85°F 331 124 348 131 334 140 355 151
95°F 374 126 393 134 379 142 400 154
105°F 425 130 450 138 430 145 456 158
115°F 481 133 507 141 484 148 514 161
TABLE 12
240 Reheat Compressor 1 Frequency 62Hz - 581021-01
Outdoor
Coil En­
tering
Air
Temp
Circuit 1 Circuit 2 Circuit 3 Circuit 4
Dis
+10
psig
Suc
+5
psig
Dis.
+10
psig
Suc
+5
psig
Dis.
+10
psig
Suc
+5
psig
Dis.
+10
psig
Suc.
+5
psig
65°F 263 122 296 126 239 126 273 140
75°F 304 126 336 126 276 133 312 144
85°F 348 129 384 128 318 138 357 148
95°F 387 129 405 129 373 140 389 148
105°F 442 133 464 133 424 144 440 151
115°F 500 137 523 136 477 147 497 152
TABLE 13
300 Std. Compressor 1 Frequency 68Hz - 581022-01
Outdoor
Coil En­
tering
Air
Temp
Circuit 1 Circuit 2 Circuit 3 Circuit 4
Dis
+10
psig
Suc
+5
psig
Dis.
+10
psig
Suc
+5
psig
Dis.
+10
psig
Suc
+5
psig
Dis.
+10
psig
Suc.
+5
psig
65°F 260 115 260 118 272 117 269 119
75°F 301 118 304 124 316 126 314 130
85°F 345 121 350 127 362 133 360 138
95°F 387 126 407 130 403 138 412 145
105°F 437 128 460 134 455 141 466 149
115°F 490 131 519 137 510 144 522 154
TABLE 14
300 Reheat Compressor 1 Frequency 68Hz - 581023-01
Outdoor
Coil En­
tering
Air
Temp
Circuit 1 Circuit 2 Circuit 3 Circuit 4
Dis
+10
psig
Suc
+5
psig
Dis.
+10
psig
Suc
+5
psig
Dis.
+10
psig
Suc
+5
psig
Dis.
+10
psig
Suc.
+5
psig
65°F 274 121 295 120 259 114 275 120
75°F 316 124 339 122 301 123 317 128
85°F 363 126 387 124 346 131 362 135
95°F 415 129 442 127 395 137 414 141
105°F 469 132 497 130 447 142 464 144
115°F 525 136 558 133 502 145 519 147
E-Charge Verification - Approach Method - AHRI
Testing (Fin/Tube Coil)
1- Using the same thermometer, compare liquid
temperature to outdoor ambient temperature.
Approach Temperature = Liquid temperature (at
condenser outlet) minus ambient temperature.
2- Approach temperature should match values in table
15. An approach temperature greater than value
shown indicates an undercharge. An approach
temperature less than value shown indicates an
overcharge.
3- The approach method is not valid for grossly over or
undercharged systems.
Use tables
5 through 14
as a
guide for typical operating pressures.
TABLE 15
APPROACH TEMPERATURES - FIN/TUBE COIL
Unit
Liquid Temp. Minus Ambient Temp.
1st Stage 2nd Stage 3rd Stage 4th Stage
156 Std.
3.0°F + 1
(1.7°C +0.5)
6.0°F + 1
(3.3°C +0.5)
6.5°F + 1
(3.6°C +0.5)
NA
156
Reheat
1.7°F+1
(0.9°C+0.5)
1.7°F+1
(0.9°C+0.5)
2.7°F+1
(1.5°C+0.5)
NA
180 Std.
2.5°F + 1
(1.4°C +0.5)
5.0°F + 1
(2.8°C +0.5)
5.5°F + 1
(3.1°C +0.5)
NA
180
Reheat
1.0°F + 1
(0.6°C +0.5)
2.8°F + 1
(1.6°C +0.5)
4.8°F + 1
(2.7°C +0.5)
NA
210 Std.
1.0°F + 1
(0.6°C +0.5)
5.5°F + 1
(3.1°C +0.5)
3.0°F + 1
(1.7°C +0.5)
6.0°F + 1
(3.3°C +0.5)
210
Reheat
2.5°F + 1
(1.4°C +0.5)
3.7°F + 1
(2.1°C +0.5)
6.0°F + 1
(3.3°C +0.5)
4.3°F + 1
(2.4°C +0.5)
240 Std.
3.5°F + 1
(1.9°C +0.5)
8.3°F + 1
(4.6°C +0.5)
4.7°F + 1
(2.6°C +0.5)
7.5°F + 1
(4.2°C +0.5)
240
Reheat
1.9°F + 1
(1.1°C +0.5)
3.8°F + 1
(2.1°C +0.5)
2.2°F + 1
(1.2°C +0.5)
5.4°F + 1
(3.0°C +0.5)
300 Std.
1.5°F+1
(0.8°C+0.5)
5.5°F+1
(3.1°C+0.5)
4.0°F+1
(2.2°C+0.5)
6.5°F+1
(3.6°C+0.5)
300
Reheat
2.8°F+1
(1.5°C+0.5)
4.2°F+1
(2.3°C+0.5)
3.8°F+1
(2.1°C+0.5)
5.4°F+1
(3.0°C+0.5)