Specification

2
SIZING INSTRUCTIONS
The performance or Sensible Heat Capacity of any evaporative
cooler is a function of both the CFM and the effi ciency, which
should be considered as part of the sizing process. To help ensure
proper sizing of a MasterCool, use the Index above to locate Per-
formance Data and Sizing Tables for a specifi c MasterCool model.
Follow the procedure below to determine the cooler size .
1. Determine design conditions:
• Outside Dry-Bulb
• Outside Wet-Bulb
• Inside Dry-Bulb (TI)
2. Determine the design Sensible Heat Load (Btuh)
3. Determine the cooler leaving air temperature (LAT)
from the tables.
4. Determine CFM from the performance tables.
5. Calculate Sensible Heat Capacity of cooler
using: SHC =1.08(TI-LAT) CFM
6. Determine the number of coolers by dividing the Sensible
Heat Load by the Sensible Heat Capacity.
PERFORMANCE: CERTIFIED AIR DELIVERY AT VARIOUS INCREMENTS OF STATIC PRESSURE
(Inches Static Pressure Water Gauge)
0" 0.1" 0.2" 0.3" 0.4" 0.5" 0.6" 0.7" 0.8" 0.9" 1.0"
CFM RPM CFM RPM CFM RPM CFM RPM CFM RPM CFM RPM CFM RPM CFM RPM CFM RPM CFM RPM CFM RPM
SAS /SAD100
PAGE 4
5377 352 5121 364 4863 376 4605 389 4336 402 4058 415 3754 430 3429 448 3097 469 ---- ---- ---- ----
5918 388 5684 398 5451 409 5215 421 4980 432 4734 444 4479 456 4209 470 3924 485 3619 503 3307 523
6774 444 6574 453 6366 463 6164 472 5956 482 5751 492 5537 502 5320 513 5095 524 4859 536 4613 548
SAS/SAD 10012
PAGE 6
5371 362 5064 374 4794 386 4536 397 4269 410 3985 423 3667 439 3318 458 2952 481 2591 507 2261 534
5911 359 5627 410 5375 420 5142 431 4907 441 4663 453 4399 465 4115 479 3809 495 3480 514 3145 536
6767 457 6513 466 6286 475 6076 484 5872 494 5666 503 5456 513 5238 523 5008 534 4755 546 4497 560
SAS/SAD 150
PAGE 8
7072 275 6622 287 6203 298 5769 308 5298 321 4777 336 4201 355 3607 378 3041 402 2522 424 2040 443
7783 302 7372 314 6987 324 6602 333 6199 343 5764 355 5285 369 4764 386 4231 406 3699 427 3199 448
8910 346 8548 356 8205 365 7870 374 7533 382 7182 391 6812 401 6416 412 5993 424 5537 439 5067 456
N/A N/A 9476 390 9159 399 8855 406 8555 414 8244 421 7924 430 7592 438 7236 448 6866 459 6470 471
N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 9315 486 9032 493 8741 500 8436 509
SAS/SAD 15012
PAGE 10
6997 267 6539 278 6087 289 5603 301 5051 315 4415 332 3717 353 3058 376 2497 398 2013 419 1571 436
7702 294 7286 303 6876 314 6450 324 5994 336 5477 349 4893 364 4260 383 3637 404 3085 425 2609 444
8817 336 8455 345 8091 353 7734 363 7359 372 6961 382 6525 393 6050 405 5527 419 4976 435 4425 453
N/A N/A 9375 378 9044 386 8719 394 8389 402 8043 411 7683 420 7293 430 6869 440 6416 452 5932 465
N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 9377 466 9070 474 8751 482 8407 490 8046 499
AS/AD100
PAGE 3
6895 413 6720 419 6537 426 6350 434 6158 442 5962 452 5757 463 5540 475 5317 488 5076 502 4816 518
7589 455 7431 460 7266 466 7098 473 6925 480 6751 488 6571 497 6385 507 6195 517 5994 529 5786 541
8687 521 8555 525 8408 530 8262 535 8115 541 7966 548 7812 555 7657 562 7501 570 7341 579 7174 588
10300 617 10190 621 10069 625 9945 629 9823 634 9698 639 9573 644 9448 649 9317 655 9189 661 9057 668
AS/AD10012
PAGE 5
7431 382 7255 390 7052 400 6835 411 6611 424 6376 437 6131 450 5877 464 5610 477 5327 492 5031 507
8178 421 8024 427 7842 436 7649 446 7450 457 7244 468 7030 480 6809 492 6580 504 6343 517 6095 529
9362 482 9235 487 9075 494 8914 502 8744 511 8572 520 8393 531 8209 541 8024 551 7827 562 7631 672
11099 571 11001 575 10868 581 10736 587 10598 594 10457 601 10313 609 10165 617 10016 625 9862 634 9709 643
AS/AD 150
PAGE 7
11405 317 10892 328 10463 338 10064 347 9671 357 9276 367 8874 378 8456 390 8006 403 7530 418 7017 436
13057 363 12600 373 12204 381 11844 390 11497 398 11153 406 10815 415 10467 424 10113 434 9741 444 9361 456
15480 430 15082 439 14735 446 14410 454 14106 461 13810 468 13520 475 13234 482 12948 489 12659 496 12361 504
17719 492 17364 500 17050 507 16756 513 16479 520 16214 526 15947 532 15694 538 15440 544 15188 550 14937 557
AS/AD15012
PAGE 9
11375 303 10905 314 10482 324 10079 335 9678 346 9265 356 8830 368 8366 380 7867 394 7325 409 6753 426
13020 346 12604 356 12225 365 11865 375 11514 384 11165 393 10807 403 10440 413 10058 423 9651 433 9220 445
15438 410 15084 419 14749 427 14434 435 14133 443 13838 450 13540 458 13246 466 12899 474 12640 482 12328 490
17672 470 17360 477 17060 484 16777 491 16505 498 16242 505 15983 512 15724 519 15463 526 15207 532 14947 539
AS/AD/AU 20012
PAGE 11
16267 276 15716 284 15200 292 14696 300 14190 308 13665 317 13110 325 12521 335 11886 346 11194 358 10450 371
19286 327 18820 334 18371 341 17943 348 17518 355 17092 361 16661 368 16211 375 15752 383 15272 390 14760 399
22077 374 21670 380 21270 387 20888 393 20514 399 20142 405 19769 410 19395 416 19015 422 18629 428 18229 435
24301 412 23929 417 23562 423 23204 429 22866 434 22528 440 22190 445 21852 450 21510 456 21171 461 20823 467
Example:
• Outside Dry-Bulb = 105
• Outside Wet-Bulb = 65
• Inside Dry-Bulb (TI) = 80
Determine the number of AD150 MasterCool cool-
ers with 3 horsepower motors required to cool
195,000 Btuh heat load. Assume .5" (water) exter-
nal static pressure.
Using the Sizing Tables, the following information
should be calculated:
LAT = 72
CFM = 11153
SHC = 1.08(80-72)11153 = 96,360 Btuh
Number of Coolers = 195,000/ 96,360 = 2
HOW TO USE THIS INDEX
Using the cooling requirement variables of Cooling Feet per Minute and External Static Pressure (shown in inches of water), locate the specifi c MasterCool
model required and its corresponding page number. Turn to the indicated page for specifi c Performance Data Sizing Tables. Follow the Sizing Instructions listed
below to determine the MasterCool product for any cooling installation.