COOLING TOWER - Olympic Internationalolympicinternational.com/...LPT-Cooling-Tower.pdf · 3 Cooling Tower Maintenance Accessibility Stainless Steel Cold Water Basin Access The LPT

®

THERMAL PERFORMANCE27 TO 332 NOMINAL TONS

STANDARDStainless Steel

Cold Water Basin!

NEWNEWNEW

COOLING TOWER†

† Mark Owned by the Cooling Technology Institute.

19047_1-11_LPT Catalog 310-F 11/15/05 11:16 AM Page 1

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■ Specify a Stainless Steel ColdWater Basin as Standard!

■ Specify Sound Levels!■ Specify CTI Certified!

©2005 EVAPCO, Inc.

All these features and more ...

THE LPT IS STANDARD WITH A STAINLESS STEELCOLD WATER BASIN AND STRAINERS!

THE LPT IS THE QUIETEST LOW PROFILECOOLINGTOWER IN THE INDUSTRY!

Solves Cooling Tower Sound Concerns!

Following EVAPCO’s philosophy of “Taking Quality and Service to a Higher Level”, EVAPCO’s standard stainless steel coldwater basin and low sound design takes industry standards in product quality to a higher level.

Owner Features■ Low Maintenance■ Low Profile■ 5 Year Motor and Drive Warranty

Contractor Features■ Low Rigging Cost■ Low Installation Cost■ Quick Connect Piping

T he LPT Cooling Tower is a combination of EVAPCO’s extensive forced draft cooling tower experience and engi-neered solutions design philosophy. The result is the easiest forced-draft cooling tower to maintain and operate.

The LPT Cooling Tower’s superior engineering design offers:

The stainless steel cold water basin and strainers will:■ Provide Protection from the Effects of Corrosion■ Extend the Life of the Cooling Tower Without the

Need for Future Basin Repairs.

The low sound design provides:■ Standard Cooling Tower Sound Levels Lower than Most

Sound Ordinances Found in the U.S.■ Sound Pressure Levels Lower than the Competitions

Comparable Product

Cooling Tower – Another Product Innovation from EVAPCO

Engineering Features■ CTI Certified Performance■ Lowest Sound with Full Attenuation


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Cooling Tower Maintenance Accessibility

Stainless Steel Cold Water Basin AccessThe LPT stainless steel cold water basin can be easilymaintained from the sides of the cooling tower throughlarge, circular access doors. The unique stepped configu-ration of the LPT heat transfer section allows unimpededaccess to the basin to allow adjustment of the float assem-bly, removal of the stainless steel strainers and basincleaning.

Mechanical Drive System AccessThe LPT mechanical drive system is easy to maintain.Bearing lubrication and belt adjustment can be performedfrom outside the unit. There is no need to remove fanscreens to maintain important drive components. In addi-tion, the locking mechanism used to maintain belt tensioncan also work as a wrench to adjust the belt.

Motor LocationAll LPT models have TEFC motors mounted on adjustablemotor bases, similar in design to the large EVAPCO ATCooling Tower Drive System. This same technology hasbeen utilized in the LPT design to allow belt adjustment tobe performed externally. In addition, the motor is locatedunder the protective fan system enclosure and can be eas-ily accessed by removing one air inlet screen.

Fan Access-Split HousingAnother unique feature of the LPT Cooling Towers are splitfan housings. The split fan housing on the LPT allows quickremoval of the fans from the front end of the unit. This fea-ture allows fan removal when units are placed side by sidewhere space is minimal.

Belt Adjustment

Bearing Lubrication


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Thermal Performance

Low Profile Cooling Towers Models LPT 316 to 8812

COOLING CAPACITY IN GPMTEMP F°EWT 90° 95° 90° 95° 90° 95° 90° 95° 95° 100° 95° 100° 95° 97° 100° 102° 95° 97° 100° 102°

MODEL MOTOR LWT 80° 80° 80° 80° 80° 80° 80° 80° 85° 85° 85° 85° 85° 87° 85° 87° 85° 87° 85° 87°NO. HP WB 66° 66° 68° 68° 70° 70° 72° 72° 75° 75° 76° 76° 78° 78° 78° 78° 80° 80° 80° 80°

LPT 316 1.5 111 83 101 76 88 67 75 58 102 77 95 72 81 102 62 77 64 85 53 66LPT 326 2 137 104 125 95 110 84 94 73 127 97 119 91 101 126 78 97 80 106 65 83LPT 336 3 155 118 142 108 125 96 107 84 144 110 134 104 115 143 90 111 92 121 74 95LPT 346 3 172 132 158 121 139 108 120 95 159 124 150 116 128 159 102 124 104 135 85 107LPT 356 5 199 154 183 141 161 126 140 111 185 144 174 136 149 184 119 144 121 157 99 125LPT 366 7.5 223 173 205 159 182 142 158 126 207 162 195 153 168 206 134 163 137 177 112 141LPT 516 3 234 178 214 162 187 144 161 126 216 166 202 156 173 215 135 166 138 182 111 143LPT 526 5 274 209 250 191 220 170 189 149 253 195 237 184 203 252 159 196 164 213 132 169LPT 536 3 284 222 262 205 232 184 203 165 264 209 249 198 216 263 175 209 178 226 148 183LPT 546 5 300 231 276 212 243 189 210 167 278 216 261 204 225 277 178 217 182 236 149 188LPT 556 7.5 309 236 283 217 249 193 215 170 286 221 268 208 230 285 182 222 186 242 151 192LPT 566 7.5 328 254 302 233 267 208 231 184 305 238 287 224 247 304 196 238 201 260 165 207LPT 576 10 357 278 329 255 292 228 253 202 332 261 313 246 271 331 215 261 220 284 180 227LPT 586 7.5 365 289 339 267 302 241 265 215 342 272 323 258 282 340 228 273 233 295 194 240LPT 596 10 394 314 366 290 328 262 288 234 369 296 349 280 306 368 248 296 253 320 211 261LPT 519 10 408 311 373 285 327 253 282 222 377 291 353 274 302 375 238 292 244 318 196 252LPT 529 15 462 353 423 323 371 288 320 253 427 330 400 311 343 425 271 331 277 361 224 286LPT 539 15 490 380 451 348 398 311 345 275 456 355 428 335 369 454 293 356 300 388 246 309LPT 549 20 519 404 479 371 423 331 367 293 483 378 455 357 392 481 312 379 319 412 262 329LPT 559 15 542 428 502 396 448 356 392 318 506 403 478 382 417 504 338 404 345 437 287 355LPT 569 20 588 467 546 432 488 390 429 349 550 441 521 418 456 548 370 441 378 476 314 388LPT 5112 15 546 418 500 384 440 342 380 303 505 392 474 369 407 503 323 392 330 428 271 340LPT 5212 20 600 462 551 423 485 377 419 334 556 432 522 407 449 554 356 433 364 472 298 376LPT 5312 25 644 498 592 456 523 407 452 360 598 466 562 439 484 596 384 467 393 509 322 405LPT 5412 30 682 529 628 485 555 433 481 384 634 496 597 467 514 631 409 496 418 540 342 431LPT 5512 25 689 543 638 502 568 452 498 403 644 511 608 484 529 641 428 512 437 554 363 450LPT 5612 30 720 569 667 525 595 473 521 423 673 535 636 507 554 670 448 536 458 580 381 471LPT 5712 30 761 608 707 564 633 510 559 459 712 574 675 545 593 710 485 575 495 619 415 508LPT 819 20 730 557 668 511 586 455 506 400 674 521 632 491 542 672 428 522 438 570 355 452LPT 829 15 755 584 695 535 613 477 530 423 701 546 659 515 567 699 451 547 461 596 377 475LPT 839 20 776 600 714 551 630 491 546 435 721 562 678 530 584 718 464 563 475 613 389 489LPT 849 15 805 634 745 586 663 527 581 471 752 597 710 565 618 749 499 598 510 647 424 525LPT 859 25 824 640 759 588 672 525 583 465 766 600 722 566 622 763 495 601 507 654 415 522LPT 869 30 849 661 784 608 694 542 602 480 791 620 745 585 643 788 512 621 524 675 429 540LPT 879 25 890 705 825 652 737 587 646 525 832 664 787 629 687 829 557 665 569 719 473 585LPT 8112 25 931 716 854 656 752 585 650 518 863 670 810 631 696 859 552 671 565 731 463 582LPT 8212 30 1005 776 924 711 814 634 705 561 933 726 877 684 754 929 599 727 613 793 501 631LPT 8312 40 1059 820 975 752 861 671 745 594 984 768 925 724 797 980 633 769 648 837 531 668LPT 8412 30 1069 842 989 777 881 699 771 625 998 792 942 750 820 994 663 794 677 859 563 696LPT 8512 50 1135 884 1048 812 927 725 805 642 1057 829 996 782 860 1053 684 830 700 903 573 722LPT 8612 40 1169 925 1083 854 967 770 847 688 1092 871 1033 825 901 1088 730 872 745 943 620 766LPT 8712 50 1245 989 1155 915 1033 825 907 737 1165 932 1103 883 964 1161 782 934 799 1008 664 821LPT 8812 50 1279 1022 1188 949 1065 860 942 774 1198 966 1135 918 998 1194 818 968 835 1041 701 857

To Make a Selection:Locate the column with the desired operating temperature conditions. Read down the column untilyou find the GPM equal to or greater than the flow required. Read horizontally to the left to findthe model number of the unit that will perform the duty.

Note: For alternate selections and conditions other than those stated, consult your iES selection program or local EVAPCO representative.


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Low Profile Cooling Towers Models LPT 316 to 5712WEIGHT FANS AIR DIMENSIONS CONNECTIONS (INCHES)

MODEL NO. MOTOR FLOW WATER WATER MAKE OVERNO. SHIPPING OPERATING FANS HP** CFM H W L P Q C 0 N M F G IN OUT UP DRAIN FLOW

LPT 316 1510 2490 1 1.5 7020 6’ 10-1/2” 3’ 4-1/2” 10’ 2” 6’ 1-7/8” 1’ 8-1/4” 3’ 10-1/4” 2’ 1/4” 2’ 8-1/4” 5’ 6” 4’ 2” 5’ 3-7/8” 4 4 1 2 2LPT 326 1520 2490 1 2 8850 6’ 10-1/2” 3’ 4-1/2” 10’ 2” 6’ 1-7/8” 1’ 8-1/4” 3’ 10-1/4” 2’ 1/4” 2’ 8-1/4” 5’ 6” 4’ 2” 5’ 3-7/8” 4 4 1 2 2LPT 336 1530 2510 1 3 10130 6’ 10-1/2” 3’ 4-1/2” 10’ 2” 6’ 1-7/8” 1’ 8-1/4” 3’ 10-1/4” 2’ 1/4” 2’ 8-1/4” 5’ 6” 4’ 2” 5’ 3-7/8” 4 4 1 2 2LPT 346 1620 2590 1 3 9940 6’ 10-1/2” 3’ 4-1/2” 10’ 2” 6’ 1-7/8” 1’ 8-1/4” 3’ 10-1/4” 2’ 1/4” 2’ 8-1/4” 5’ 6” 4’ 2” 5’ 3-7/8” 4 4 1 2 2LPT 356 1630 2600 1 5 11780 6’ 10-1/2” 3’ 4-1/2” 10’ 2” 6’ 1-7/8” 1’ 8-1/4” 3’ 10-1/4” 2’ 1/4” 2’ 8-1/4” 5’ 6” 4’ 2” 5’ 3-7/8” 4 4 1 2 2LPT 366 1670 2640 1 7.5 13490 6’ 10-1/2” 3’ 4-1/2” 10’ 2” 6’ 1-7/8” 1’ 8-1/4” 3’ 10-1/4” 2’ 1/4” 2’ 8-1/4” 5’ 6” 4’ 2” 5’ 3-7/8” 4 4 1 2 2LPT 516 2320 4040 1 3 14880 6’ 10-5/8” 5’ 5/8” 12’ 3” 6’ 1-3/ 4” 2’ 6-3/8” 3’ 10-3/8” 2’ 1/4” 2’ 9-3/4” 5’ 6” 6’ 3” 6’ 7-3/4” 4 4 1 2 3LPT 526 2330 4050 1 5 17640 6’ 10-5/8” 5’ 5/8” 12’ 3” 6’ 1-3/4” 2’ 6-3/8” 3’ 10-3/8” 2’ 1/4” 2’ 9-3/4” 5’ 6” 6’ 3” 6’ 7-3/4” 4 4 1 2 3LPT 536 2470 4190 1 3 14560 7’ 10-5/8” 5’ 5/8” 12’ 3” 7’ 1-3/4” 2’ 6-3/8” 4’ 10-3/8” 2’ 1/4” 2’ 9-3/4” 5’ 6” 6’ 3” 6’ 7-3/4” 4 4 1 2 3LPT 546 2410 4130 1 5 17320 6’ 10-5/8” 5’ 5/8” 12’ 3” 6’ 1-3/4” 2’ 6-3/8” 3’ 10-3/8” 2’ 1/4” 2’ 9-3/4” 5’ 6” 6’ 3” 6’ 7-3/4” 4 4 1 2 3LPT 556 2370 4100 1 7.5 20210 6’ 10-5/8” 5’ 5/8” 12’ 3” 6’ 1-3/4” 2’ 6-3/8” 3’ 10-3/8” 2’ 1/4” 2’ 9-3/4” 5’ 6” 6’ 3” 6’ 7-3/4” 4 4 1 2 3LPT 566 2400 4120 1 7.5 19960 6’ 10-5/8” 5’ 5/8” 12’ 3” 6’ 1-3/4” 2’ 6-3/8” 3’ 10-3/8” 2’ 1/4” 2’ 9-3/4” 5’ 6” 6’ 3” 6’ 7-3/4” 4 4 1 2 3LPT 576 2480 4210 1 10 21300 6’ 10-5/8” 5’ 5/8” 12’ 3” 6’ 1-3/4” 2’ 6-3/8” 3’ 10-3/8” 2’ 1/4” 2’ 9-3/4” 5’ 6” 6’ 3” 6’ 7-3/4” 4 4 1 2 3LPT 586 2520 4240 1 7.5 19750 7’ 10-5/8” 5’ 5/8” 12’ 3” 7’ 1-3/4” 2’ 6-3/8” 4’ 10-3/8” 2’ 1/4” 2’ 9-3/4” 5’ 6” 6’ 3” 6’ 7-3/4” 4 4 1 2 3LPT 596 2560 4280 1 10 21300 7’ 10-5/8” 5’ 5/8” 12’ 3” 7’ 1-3/4” 2’ 6-3/8” 4’ 10-3/8” 2’ 1/4” 2’ 9-3/4” 5’ 6” 6’ 3” 6’ 7-3/4” 4 4 1 2 3LPT 519 2820 5430 1 10 26470 7’ 5/8” 5’ 5/8” 15’ 2-3/8” 6’ 2-7/8” 2’ 6-3/8” 4’ 3/8” 4’ 11-5/8” 5’ 7-1/8” 8’ 5-3/8” 6’ 3” 6’ 7-3/4” 6 6 1 2 3LPT 529 2930 5530 1 15 30290 7’ 5/8” 5’ 5/8” 15’ 2-3/8” 6’ 2-7/8” 2’ 6-3/8” 4’ 3/8” 4’ 11-5/8” 5’ 7-1/8” 8’ 5-3/8” 6’ 3” 6’ 7-3/4” 6 6 1 2 3LPT 539 2990 5590 1 15 29960 7’ 5/8” 5’ 5/8” 15’ 2-3/8” 6’ 2-7/8” 2’ 6-3/8” 4’ 3/8” 4’ 11-5/8” 5’ 7-1/8” 8’ 5-3/8” 6’ 3” 6’ 7-3/4” 6 6 1 2 3LPT 549 3000 5600 1 20 32110 7’ 5/8” 5’ 5/8” 15’ 2-3/8” 6’ 2-7/8” 2’ 6-3/8” 4’ 3/8” 4’ 11-5/8” 5’ 7-1/8” 8’ 5-3/8” 6’ 3” 6’ 7-3/4” 6 6 1 2 3LPT 559 3170 5770 1 15 29590 8’ 5/8” 5’ 5/8” 15’ 2-3/8” 7’ 2-7/8” 2’ 6-3/8” 5’ 3/8” 4’ 11-5/8” 5’ 7-1/8” 8’ 5-3/8” 6’ 3” 6’ 7-3/4” 6 6 1 2 3LPT 569 3240 5830 1 20 32110 8’ 5/8” 5’ 5/8” 15’ 2-3/8” 7’ 2-7/8” 2’ 6-3/8” 5’ 3/8” 4’ 11-5/8” 5’ 7-1/8” 8’ 5-3/8” 6’ 3” 6’ 7-3/4” 6 6 1 2 3LPT 5112 3440 6990 1 15 32190 7’ 5/8” 5’ 5/8” 18’ 2-3/4” 6’ 2-7/8” 2’ 6-3/8” 4’ 3/8” 8’ 8’ 7-1/2” 11’ 5-3/4” 6’ 3” 6’ 7-3/4” 6 6 1 2 3LPT 5212 3450 7010 1 20 35460 7’ 5/8” 5’ 5/8” 18’ 2-3/4” 6’ 2-7/8” 2’ 6-3/8” 4’ 3/8” 8’ 8’ 7-1/2” 11’ 5-3/4” 6’ 3” 6’ 7-3/4” 6 6 1 2 3LPT 5312 3460 7020 1 25 38170 7’ 5/8” 5’ 5/8” 18’ 2-3/4” 6’ 2-7/8” 2’ 6-3/8” 4’ 3/8” 8’ 8’ 7-1/2” 11’ 5-3/4” 6’ 3” 6’ 7-3/4” 6 6 1 2 3LPT 5412 3490 7040 1 30 40550 7’ 5/8” 5’ 5/8” 18’ 2-3/4” 6’ 2-7/8” 2’ 6-3/8” 4’ 3/8” 8’ 8’ 7-1/2” 11’ 5-3/4” 6’ 3” 6’ 7-3/4” 6 6 1 2 3LPT 5512 3700 7250 1 25 37890 8’ 5/8” 5’ 5/8” 18’ 2-3/4” 7’ 2-7/8” 2’ 6-3/8” 5’ 3/8” 8’ 8’ 7-1/2” 11’ 5-3/4” 6’ 3” 6’ 7-3/4” 6 6 1 2 3LPT 5612 3720 7270 1 30 40280 8’ 5/8” 5’ 5/8” 18’ 2-3/4” 7’ 2-7/8” 2’ 6-3/8” 5’ 3/8” 8’ 8’ 7-1/2” 11’ 5-3/4” 6’ 3” 6’ 7-3/4” 6 6 1 2 3LPT 5712 3980 7520 1 30 40110 9’ 5/8” 5’ 5/8” 18’ 2-3/4” 8’ 2-7/8” 2’ 6-3/8” 6’ 3/8” 8’ 8’ 7-1/2” 11’ 5-3/4” 6’ 3” 6’ 7-3/4” 6 6 1 2 3

Engineering Data and Dimensions

Notes:1) An adequately sized bleed line must be installed in the cooling tower system to prevent buildup of impurities in the recirculated water.2) Do not use catalog drawings for certified prints. Dimensions subject to change.3) For external static pressure up to 1/2”, use next size fan motor.** One fan motor per unit.

* 4 inch connections are Male Pipe Thread, 6 inch con-nections are both beveled for welding and groovedfor a mechanical coupling. Consult the factory forspecial connection requirements.

*

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4 3/4” -LRT 3-61TO 5-69


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Low Profile Cooling Towers Models LPT 819 to 8812

Notes:1) An adequately sized bleed line must be installed in the cooling tower system to prevent buildup of impurities in the recirculated water.2) Do not use catalog drawings for certified prints. Dimensions subject to change.3) For external static pressure up to 1/2”, use next size fan motor.** One fan motor per unit.

WEIGHT FAN AIR DIMENSIONS CONNECTIONS (INCHES)MODEL NO. MOTOR FLOW WATER WATER MAKE OVER

NO. SHIPPING OPERATING FANS HP** CFM H L P C 0 N M IN OUT UP DRAIN FLOW

LPT 819 4220 8530 2 20 49270 6’ 11-1/2” 15’ 2-3/8” 6’ 5/8” 3’ 11-1/4” 4’ 11-5/8” 5’ 7-5/8” 8’ 5-3/8” 8 8 1 2 3

LPT 829 4290 8600 2 15 41610 6’ 11-1/2” 15’ 2-3/8” 6’ 5/8” 3’ 11-1/4” 4’ 11-5/8” 5’ 7-5/8” 8’ 5-3/8” 8 8 1 2 3

LPT 839 4220 8530 2 20 46850 6’ 11-1/2” 15’ 2-3/8” 6’ 5/8” 3’ 11-1/4” 4’ 11-5/8” 5’ 7-5/8” 8’ 5-3/8” 8 8 1 2 3

LPT 849 4460 8770 2 15 41020 7’ 11-1/2” 15’ 2-3/8” 7’ 5/8” 4’ 11-1/4” 4’ 11-5/8” 5’ 7-5/8” 8’ 5-3/8” 8 8 1 2 3

LPT 859 4320 8630 2 25 49340 6’ 11-1/2” 15’ 2-3/8” 6’ 5/8” 3’ 11-1/4” 4’ 11-5/8” 5’ 7-5/8” 8’ 5-3/8” 8 8 1 2 3

LPT 869 4340 8650 2 30 51110 6’ 11-1/2” 15’ 2-3/8” 6’ 5/8” 3’ 11-1/4” 4’ 11-5/8” 5’ 7-5/8” 8’ 5-3/8” 8 8 1 2 3

LPT 879 4490 8790 2 25 48680 7’ 11-1/2” 15’ 2-3/8” 7’ 5/8” 4’ 11-1/4” 4’ 11-5/8” 5’ 7-5/8” 8’ 5-3/8” 8 8 1 2 3

LPT 8112 4760 10610 2 25 57240 6’ 11-1/2” 18’ 2-3/4” 6’ 5/8” 3’ 11-1/4” 8’ 8’ 7” 11’ 5-3/4” 8 8 2 2 3

LPT 8212 4830 10670 2 30 59530 6’ 11-1/2” 18’ 2-3/4” 6’ 5/8” 3’ 11-1/4” 8’ 8’ 7” 11’ 5-3/4” 8 8 2 2 3

LPT 8312 5080 10920 2 40 66940 6’ 11-1/2” 18’ 2-3/4” 6’ 5/8” 3’ 11-1/4” 8’ 8’ 7” 11’ 5-3/4” 8 8 2 2 3

LPT 8412 5110 10960 2 30 58650 7’ 11-1/2” 18’ 2-3/4” 7’ 5/8” 4’ 11-1/4” 8’ 8’ 7” 11’ 5-3/4” 8 8 2 2 3

LPT 8512 5190 11030 2 50 68790 6’ 11-1/2” 18’ 2-3/4” 6’ 5/8” 3’ 11-1/4” 8’ 8’ 7” 11’ 5-3/4” 8 8 2 2 3

LPT 8612 5410 11250 2 40 64560 7’ 11-1/2” 18’ 2-3/4” 7’ 5/8” 4’ 11-1/4” 8’ 8’ 7” 11’ 5-3/4” 8 8 2 2 3

LPT 8712 5520 11360 2 50 68790 7’ 11-1/2” 18’ 2-3/4” 7’ 5/8” 4’ 11-1/4” 8’ 8’ 7” 11’ 5-3/4” 8 8 2 2 3

LPT 8812 5840 11670 2 50 68700 8’ 11-1/2” 18’ 2-3/4” 8’ 5/8” 5’ 11-1/4” 8’ 8’ 7” 11’ 5-3/4” 8 8 2 2 3

Engineering Data and Dimensions

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LPT Ships Factory AssembledThe compact, unitary design of the LPT Cooling Towerallows them to be shipped completely assembled. Thisresults in lower transportation costs and no assemblyrequirements at the job site. Only one lift is required torig the LPT. Note: Options such as attenuation and dischargehoods will require additional lifts.

Structural Steel SupportThe recommended method of support for the LPT coolingtower is two structural “I” beams located under the outerflanges and running the entire length of the unit. Mountingholes 3/4” in diameter, are located at the bottom channelsof the pan section to provide for bolting to the structuralsteel. Refer to certified drawings from the factory for bolthole locations. See the drawing and chart below for unitdimensions.

Note:1) Beams should be level before setting the unit in place.

2) Do not level the unit by shimming between it and the“I” beams as this will not provide proper longitudinalsupport.

3) Beams should be sized in accordance with acceptedstructural practices. Support beams and anchor boltsare to be furnished by others.

Indoor InstallationAll LPT Cooling Towers can be installed indoors wherethey normally require ductwork to and from the unit.The design of the ductwork should be symmetrical to pro-vide even air distribution across both intake and dischargeopenings. Guidelines for Ducted Applications:

1) The static pressure loss imposed by the ductworkmust not exceed 1/2”. The fan motor size must beincreased for ESP up to 1/2”.

2) For ducted installations, the solid bottom panel optionmust be ordered. A blank off plate will also be providedin lieu of the side air inlet screens with this option.

3) Important, Access Doors must be located in the duct-work for service to the fan drive components andwater distribution system.

Drawings are available showing recommended ductworkconnections. See EVAPCO’s Layout Guidelines for addi-tional information.

DIMENSIONSModel No. A B

LPT 316 to 366 10’ 1-7/8” 3’ 4-1/2”LPT 516 to 596 12’ 2-3/4” 5’ 5/8”LPT 519 to 569 15’ 2-1/4” 5’ 5/8”LPT 5112 to 5712 18’ 2-5/8” 5’ 5/8”LPT 819 to 879 15’ 2-1/4” 7’ 10”LPT 8112 to 8812 18’ 2-5/8” 7’ 10”

Applications

Note: Ductwork/solid bottom panels negate the CTICertification.


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DesignEVAPCO LPT Cooling Towers have heavy-duty construc-tion and are designed for long, trouble-free operation.However, proper equipment selection, installation andmaintenance are necessary to insure good unit perform-ance. Some of the major considerations in the applicationof a cooling tower are presented below. For additionalinformation, contact the factory.Air CirculationIn reviewing the system design and unit location, it is impor-tant that enough fresh air is provided to enable proper unitperformance. The best location is on an unobstructed rooftop or on ground level away from walls and other barriers.Care must be taken when locating towers in wells or enclo-sures or next to high walls. The potential for recirculationof the hot, moist discharge air back into the fan intakeexists. Recirculation raises the wet bulb temperature of theentering air causing the leaving water temperature to riseabove design. For these cases, a discharge hood or duct-work should be provided to raise the overall unit heighteven with the adjacent wall, thereby reducing the chance ofrecirculation. For additional information see the EVAPCOEquipment Layout Manual. Engineering assistance is alsoavailable from the factory to identify potential recirculationproblems and recommend solutions.Capacity ControlThe design wet bulb for which the cooling tower is sizedoccurs only a small percentage of the time. Unless colderwater temperatures are beneficial to the process beingcooled, some form of capacity control will be needed. A common control practice is to cycle the fans off whenleaving water is below the minimum allowable temperature.However this does not provide close control of the leavingwater temperature and may cycle the motor on and offmore than the recommended limit of six (6) starts per hour.Another method is to use two-speed fan motors which adda second step of control. Two speed fan motors are anexcellent method of capacity control for the LPT. Thisarrangement gives capacity steps of 10% (fans off), 60% (fanshalf-speed) and 100%. A temperature controller can besupplied to set control at 5° increments, so fairly close tem-perature control can be maintained without excessivecycling of the fan motor.Two-speed motors also save operating costs. At half-speedthe motor draws approximately 15% of full load power.Since maximum wet bulb and maximum load very seldomcoincide on air conditioning systems, the cooling tower willactually operate at half speed 80% of the time. Thus, powercosts will be reduced by approximately 85% during themajor portion of the operating season.Caution: The water circulation pump must be inter-locked with the fan motor starter(s) to insure waterflow over the tower fill during fan operation.

PipingCooling tower piping should be designed and installed inaccordance with generally accepted engineering practices.All piping should be anchored by properly designed hangers

and supports with allowance made for possible expansionand contraction. No external loads should be placed uponcooling tower connections, nor should any of the pipe sup-ports be anchored to the unit framework.Maintaining the Recirculated Water SystemThe cooling in a tower is accomplished by the evaporationof a portion of the recirculated spray water. As this waterevaporates, it leaves behind all of its mineral content andimpurities. Therefore, it is important to bleed-off anamount of water equal to that which is evaporated to prevent the buildup of impurities. If this is not done, the mineral content and/or the corrosive nature of the waterwill continue to increase. This will ultimately result in heavyscaling or a corrosive condition.Bleed-offA bleed line should be installed in the piping, external to theunit. The bleed line must be properly sized for the applica-tion and provided with a metering connection and globevalve. The recommended bleed off for a cooling tower isequivalent to the evaporation rate of 3 gpm per 100 tons ofcooling. If the make-up water supplying the unit is relativelyfree of impurities, it may be possible to cut back the bleed,but the unit must be checked frequently to make sure scaleis not forming. Make-up water pressure must be main-tained between 20 and 50 psig for proper operation of the float valve.Water TreatmentIn some cases the make-up water will be so high in mineralcontent that a normal bleed-off will not prevent scaling. Inthese cases water treatment will be required and a rep-utable water treatment company familiar with the localwater conditions should be consulted.Any chemical water treatment used must be compatiblewith the stainless and galvanized construction of the unit.The pH of the water should be maintained between 6.5 and8.0. In order to prevent “white rust”, the galvanized steelin the unit requires routine passivation of the steel whenthe system is operating in higher pH levels. Batch chemicalfeeding is not recommended because it does not afford theproper degree of control. If acid cleaning is requiredextreme caution must be exercised and only inhibited acidscompatible with galvanized steel construction should beused.Control of Biological ContaminationWater quality should be checked regularly for biological con-tamination. If biological contamination is detected, a moreaggressive water treatment and mechanical cleaning programshould be undertaken. The water treatment program shouldbe performed by a qualified water treatment company. It isimportant that all internal surfaces be kept clean of accumu-lated dirt and sludge. In addition, the drift eliminators shouldbe maintained in good operating condition.

Note: The location of the cooling tower must beconsidered during the equipment layout stages of aproject. It is important to prevent the discharge air(potential of biological contamination) from beingintroduced into the fresh air intakes of the building.

Applications


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DischargeAttenuation

InletAttenuation

InletAttenuation

Optional Equipment for Low Sound Applications

Motor and DriveAccess Panel

Drift Eliminator andWater Distribution

Access Panel

Inlet Attenuation

Reduces sound radiated through the end andside air intakes. It consists of baffled panels tochange the path of the air entry and to cap-ture the radiated noise thus reducing theoverall sound levels generated. In addition,the external belt adjustment mechanism isextended through the inlet attenuator toallow easy belt adjustment without having toenter the unit. The attenuation package isself-supporting and does not require structur-al steel support.

Discharge Attenuation

The discharge attenuation hood features astraight sided design with insulated baffles toreduce the overall sound levels of the dis-charge air. The discharge attenuation incor-porates a large access panel to allow entry tothe drift eliminators and water distributionsystem. If a higher discharge velocity isrequired with minimal sound attenuation, a tapered discharge hood is available.

Sound Attenuation Packages

The standard LPT is the quietest, low profile centrifugal fan cooling tower in the industry. This is achieved by providingthe first stage of inlet sound attenuation as part of the LPT ’s standard design. The LPT drive system, including the fanhousing(s), electric motors, belts, bearings and drives, is completely enclosed by a protective housing which covers thedrive system and also provides a significant level of sound reduction.

If the standard LPT sound pressure level is not quiet enough for certain applications, the sound levels can be furtherreduced by adding various stages of sound attenuation. Consult the factory for Factory Certified Sound Data for eachoption. Please refer to Evapco’s selection software for correct model number designation and CTI Certified performance.

†

† Mark Owned by the Cooling Technology Institute.


10

Optional Equipment

Pan Freeze Protection

Remote SumpWhenever a cooling tower is idle during sub-freezing weath-er, the water in the sump must be protected from freezingand damaging the pan. The simplest and most reliablemethod of accomplishing this is with a remote sump tanklocated in a heated space in the building under the tower.With this system, the water in the tower drains to theindoor tank whenever the pump is shut-off. When a tower isordered for remote sump operation, the standard float valveand strainer are omitted, and the unit is provided with anoversized water outlet connection. When a remote sump isnot possible, a supplementary means of heating the pan watermust be provided.

Electric HeatersElectric immersion heaters are available factory installed inthe basin of the tower. They are sized to maintain a +40°Fpan water temperature at 0°F ambient with the fans off. Theyare furnished with a combination thermostat/low water pro-tection device to cycle the heater on when required and toprevent the heater elements from energizing unless they arecompletely submerged. All components are enclosed inrugged, weather proof enclosures for outdoor use. Heatercontrol packages are available as an option. Contact yourlocal EVAPCO representative for further details.

Steam or Hot Water CoilsPan coils are available as an alternate to the electric heatersdescribed above. Constructed of galvanized pipe installed inthe cooling tower basin, they are supplied less controls andare ready for piping to an external steam or hot watersource. Pan water heater controls should be interlockedwith the water circulating pump to prevent their operationwhen the pump is energized.

Electric Water Level ControlEVAPCO LPT Cooling Towers are available with an optionalelectric water level control system in place of the standardmechanical makeup valve and float assembly. This packageprovides accurate control of the pan water level and doesnot require field adjustment, even under widely variableoperating conditions.The control was designed by EVAPCO and consists of multi-ple heavy duty stainless steel electrodes. These electrodesare mounted external to the unit in a vertical stand pipe. Forwinter operation, the stand pipe must be wrapped with elec-tric heating cable and insulated to protect it from freezing.The weather protected slow closing solenoid valve for themakeup water connection is factory supplied and is ready forpiping to a water supply with a pressure between 20 psig(minimum) and 50 psig (maximum).

Vibration IsolatorsThe fans on EVAPCO cooling towers are balanced and runvirtually vibration free. In addition, the rotating mass is verysmall in relation to the total mass of the cooling tower, fur-ther reducing the possibility of objectionable vibration beingtransmitted to the building structure. As a result, vibrationisolation is generally not required.In those cases where it is determined that vibration isolationis necessary, spring type vibration isolator rails can be fur-nished. The rails are constructed of heavy gauge G-235 hot-dip galvanized steel for superior corrosion resistance. Railsare designed to be mounted between the cooling tower andthe supporting steel framework. They are 90% efficient andhave approximately 1” static deflection. Rails are designedfor wind loading up to 50 mph.It is important to note that vibration isolation must beinstalled continuously along the full length of the coolingtower on both sides of the unit. Point isolators may be usedbetween the supporting steel and the building framework, butnot between the unit and the supporting steel.

Screened Bottom PanelsProtective inlet screens are provided on the front of the fansection on the LPT. Screens are not provided on the bottomof the fan section since most units are mounted on the roofor at ground level.If units are installed in an elevated position, bottom screensare recommended for safety protection.

Other Options Available:Pony MotorsLaddersInverter Duty and 2 Speed MotorsSteam InjectorsStainless Steel Material OptionsStainless Steel Fan ShaftsTapered Discharge HoodsSolid Bottom Panels for Ducted Applications

BASIN HEATER*See factory certified prints for detailed drawings.

*

Model No. KWLPT 316 to 366 (1) 2LPT 516 to 596 (1) 3LPT 519 to 569 (1) 3LPT 5112 to 5712 (1) (6)LPT 819 to 879 (1) (7)LPT 8112 to 8812 (1) (9)

* Electric heater selection based on 0°F ambient temperature. Foralternate low ambient heater selections, consult the factory.

Electric Pan Heaters


11

Furnish and install EVAPCO Model(s) LPT _______Counterflow, Blow-Through Cooling Tower with single sideair entry to cool ______ GPM of water from ____°F to____°F with a ____°F entering wet bulb temperature. Unitheight shall not exceed _____feet. Cooling tower(s) shall befully assembled with all moving parts factory mounted andaligned. Additionally, the thermal performance shall be certified by the Cooling Technology Institute in accordancewith CTI Standard 201. Non CTI Certified units will not be acceptable.

Cold Water BasinThe complete cold water shall be constructed of Type 304 stain-less steel for long life and durability.Standard cold water basin accessories shall include Type 304stainless steel overflow, drain, anti-vortexing hood, strainersand brass make-up valve with unsinkable, foam filled plasticfloat. A circular access door shall be located above the basinto allow easy access to the pan interior.The outlet shall be Type 304 stainless steel grooved for amechanical coupling and beveled for welding or a threadedconnection.

Casing and Fan SectionThe casing and fan section shall be constructed of G-235 galvanized steel for long life and durability. Fan section shallinclude fans, motors and drives. The entire drive system(including fans, motors, sheaves and belts) shall be located inthe dry entering air stream.

Centrifugal Fans and DrivesThe complete drive system, including the fan housing, elec-tric motor, belts, bearings and drives shall be completelyenclosed by a protective housing which covers the drive sys-tem and provides sound reduction. Fans shall be forwardly curved centrifugal type of hot-dip gal-vanized construction. The fans shall be factory installed, stati-cally and dynamically balanced for vibration free operation.The fans shall be mounted on a solid steel shaft with forgedbearing journals. The fan shaft shall be supported by heavy-duty, self aligning ball bearings with cast iron housings andlubrication fittings for maintenance. The fan drive shall be V-Belt type adjustable from outside the unit, with taper locksheaves designed for 150% of the motor nameplate horse-power. Drives are to be mounted and aligned at the factory.A belt adjustment device shall be provided as standard.

Fan MotorFan motor(s) shall be _____Horsepower T.E.F.C. designwith 1.15 service factor and suitable for outdoor installationon _____volts, ______hertz, and _____ phase electricalservice. Motor(s) shall be mounted on an adjustable base.

Fill Section*The cooling tower fill shall be PVC (Polyvinyl Chloride) ofcross-fluted design for optimum heat transfer and efficiency.The cross-fluted sheets shall be bonded together for strengthand durability. The fill shall have special drainage tips to allowhigh water loading and low pressure drop. The fill sectionshall be easily removed from the cooling tower casing sec-tion. The PVC fill shall be self-extinguishing for fire resistancewith a flame spread rating of 5 per ASTM E84-81a. It shallalso be resistant to rot, decay or biological attack.

Water Distribution SystemThe spray header and branches shall be constructed ofSchedule 40 PVC (Polyvinyl Chloride) pipe for corrosionresistance and shall have a steel connection which is eitherbeveled for weld/grooved for a mechanical coupling orthreaded to attach the external piping. The water shall bedistributed over the fill by precision molded threaded ABSspray nozzles with large 3/8 by 1 inch orifice openings andintegral sludge ring to prevent clogging. The internal towerwater distribution system piping shall be removable forcleaning and have threaded end caps to allow debris to beremoved.

EliminatorsThe eliminators shall be constructed of inert polyvinyl chlo-ride (PVC) that has been specially treated to resist UVdegradation. Assembled in easily handled sections, theeliminators shall incorporate three changes in air directionto assure removal of entrained moisture from the dischargeair stream.The drift rate shall not exceed 0.001% of the recirculated water rate.

FinishThe complete cold water basin shall be constructed of Type304 stainless steel for maximum corrosion protection. Thecasing and fan section shall be constructed of G-235 heavygauge mill hot-dip galvanized steel. During fabrication, allpanel edges shall be coated with a 95% pure zinc compound.Coated finishes shall not be acceptable.

Mechanical Equipment WarrantyThe motor and drive system shall carry a 5 year warrantyfrom the date of shipment, against defects in materials andworkmanship including the fan(s), bearings, sheaves, shafts,fan motor(s) and mechanical equipment supports

* The LPT uses the patented EVAPAK® fill (U.S. Patent No.5,124,087) which is designed to induce highly turbulentmixing of the air and water for superior heat transfer.

Specifications


World Headquarters/Research and Development Center

EVAPCO Locations

EVAPCO...Taking Quality and Service to a Higher Level!

EVA P C O PR O D U C T S A R E MA N U FA C T U R E D WO R L D W I D E .

Visit EVAPCO’s Website at: http://www.evapco.com

EVAPCO, Inc.North American HeadquartersP.O. Box 1300Westminster, MD 21158 USAPhone: 410-756-2600Fax: 410-756-6450E-mail: [email protected]

EVAPCO Asia/Pacific

EVAPCO ChinaAsia/Pacific HeadquartersSuite D, 23rd Floor, Majesty Building138 Pudong Avenue Shanghai, 200120, P.R. China Phone: (86) 21-5877-3980Fax: (86) 21-5877-2928E-mail: [email protected]

EVAPCO Europe

EVAPCO Europe, N.V.European HeadquartersHeersterveldweg 19Industriezone, Tongeren-Oost 3700 Tongeren, BelgiumPhone: (32) 12-395029Fax: (32) 12-238527E-mail: [email protected]

EVAPCO East5151 Allendale LaneTaneytown, MD 21787 USAPhone: 410-756-2600Fax: 410-756-6450E-mail: [email protected]

EVAPCO Midwest1723 York RoadGreenup, IL 62428 USAPhone: 217-923-3431Fax: 217-923-3300E-mail: [email protected]

EVAPCO West1900 West Almond AvenueMadera, CA 93637 USAPhone: 559-673-2207Fax: 559-673-2378E-mail: [email protected]

EVAPCO Iowa925 Quality DriveLake View, IA 51450 USAPhone: 712-657-3223Fax: 712-657-3226

EVAPCO IowaSales & Engineering1234 Brady BoulevardOwatonna, MN 55060 USAPhone: 507-446-8005Fax: 507-446-8239E-mail: [email protected]

Refrigeration Valves & SystemsA wholly owned subsidiary of EVAPCO, Inc.1520 Crosswind Dr.Bryan, TX 77808 USAPhone: (979) 778-0095Fax: (979) 778-0030E-mail: [email protected]

McCormack Coil Company, Inc.A wholly owned subsidiary of EVAPCO, Inc.P.O. Box 17276333 S.W. Lakeview BoulevardLake Oswego, OR 97035 USAPhone: 503-639-2137Fax: 503-639-1800E-mail: [email protected]

EvapTech, Inc.A wholly owned subsidiary of EVAPCO, Inc.8331 Nieman RoadLenexa, KS 66214 USAPhone: 913-322-5165Fax: 913-322-5166E-mail: [email protected]

Tower Components, Inc.A wholly owned subsidiary of EVAPCO, Inc.5960 US HWY 64ERamseur, NC 27316Phone: 336-824-2102Fax: 336-824-2190E-mail: [email protected]

EVAPCO Europe, N.V.Heersterveldweg 19Industriezone Tongeren-Oost3700 Tongeren, BelgiumPhone: (32) 12-395029 Fax: (32) 12-238527E-mail: [email protected]

EVAPCO Europe, S.r.l.Via Ciro Menotti 101-20017 Passirana di RhoMilan, ItalyPhone: (39) 02-939-9041Fax: (39) 02-935-00840E-mail: [email protected]

EVAPCO Europe, S.r.l.Via Dosso 223020 Piateda Sondrio, Italy

EVAPCO Europe, GmbHBovert 22D-40670 Meersbusch, GermanyPhone: (49) 2159-69560Fax: (49) 2159-695611E-mail: [email protected]

EVAPCO S.A. (Pty.) Ltd.A licensed manufacturer of Evapco, Inc.18 Quality RoadIsando 1600Republic of South AfricaPhone: (27) 11 392-6630Fax: (27) 11-392-6615E-mail: [email protected]

Tiba Engineering Industries Co.A licensed manufacturer of Evapco, Inc.92 Asma Fahmi St.ARD El-Golf-Heliopolis, Cairo, EgyptPhone: (20) 2-290-7483/(20) 2-291-3610Fax: (20) 2-290-0892/ (20) 2-414-5611E-mail: [email protected]

EVAPCO ChinaSuite D, 23rd Floor, Majesty Building138 Pudong Avenue Shanghai, 200120, P.R. China Phone: (86) 21-5877-3980Fax: (86) 21-5877-2928E-mail: [email protected]

Beijing EVAPCO RefrigerationEquipment Co., Ltd.Yan Qi Industrial Development DistrictHuai Rou County Beijing, P.R. ChinaPostal Code 101407Phone: (86) 10 6166-7238Fax: (86) 10 6166-7395E-mail: [email protected]

Shanghai Hezhong EVAPCORefrigeration Equipment Co., Ltd.855 Yang Tai RoadBao Shan AreaShanghai, P.R. ChinaPostal Code 201901Phone: (86) 21 5680-5298Fax: (86) 21 5680-6642E-mail: [email protected]

Aqua-Cool Towers (Pty.) Ltd.A licensed manufacturer of Evapco, Inc.34-42 Melbourne St.P.O. Box 436Riverstone, N.S.W. Australia 2765Phone: (61) 29 627-3322Fax: (61) 29 627-1715E-mail: [email protected]

EVAPCO North America

EVAPCO...SPECIALISTS IN HEATTRANSFER PRODUCTS AND SERVICES.

3M/1105/YGS Bulletin 312A

19074_PG12 12/10/05 9:59 AM Page 1

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COOLING TOWER - Olympic Internationalolympicinternational.com/...LPT-Cooling-Tower.pdf · 3 Cooling Tower Maintenance Accessibility Stainless Steel Cold Water Basin Access The LPT