Bard MEGA-TEC W150A - Page 42

Manual 2100-671C
Page 40 of 59
TABLE 13
W120A* Cooling Pressures
Low side pressure ± 4 PSIG
High side pressure ± 10 PSIG
1
Stage 3 is circuit 1 fully loaded and circuit 2 on.
2
Stage 2 is circuit 1 unloaded and circuit 2 on.
3
Stage 1 is circuit 1 unloaded and circuit 2 off.
Tables are based upon rated CFM (airflow) across the evaporator coil. If there is any doubt as to correct operating charge
being in the system, the charge should be removed and system evacuated and recharged to serial plate charge weight.
NOTE: Pressure table based on high speed condenser fan operation. If condensing pressures appear elevated, check
condenser fan wiring. See “Condenser Fan Operation” on page 23.
Cooling Air Temperature Entering Outdoor Coil °F
Model Return Air Temp Pressure 75 80 85 90 95 100 105 110 115 120 125
W120A*
Stage 3
1
75° DB Low Side 125 126 127 128 129 130 132 133 135 137 137
62° WB High Side 312 334 357 379 403 427 451 476 501 527 553
80° DB Low Side 134 135 136 137 138 139 141 142 144 146 147
67° WB High Side 320 343 366 389 413 438 463 488 514 540 567
85° DB Low Side 139 140 141 142 143 144 146 147 149 151 152
72° WB High Side 331 355 379 403 427 453 479 505 532 559 587
W120A*
Stage 2
2
75° DB Low Side 136 137 137 138 140 141 142 144 145 147 148
62° WB High Side 289 308 330 352 374 398 423 448 474 501 528
80° DB Low Side 145 146 147 148 150 151 152 154 155 157 158
67° WB High Side 296 316 338 361 384 408 434 459 486 514 542
85° DB Low Side 150 151 152 153 155 156 157 159 160 162 164
72° WB High Side 306 327 350 374 397 422 449 475 503 532 561
W120A*
Stage 1
3
75° DB Low Side 125 127 128 130 131 133 135 136 137 139 141
62° WB High Side 311 332 355 377 402 427 452 479 506 534 563
80° DB Low Side 134 136 137 139 140 142 144 145 147 149 151
67° WB High Side 319 341 364 387 412 438 464 491 519 548 577
85° DB Low Side 139 141 142 144 145 147 149 150 152 154 156
72° WB High Side 330 353 377 401 426 453 480 508 537 567 597