5001825
®
MegaTherm
High Performance Gas Fired
Commercial Pool Heater
Powerful, efficient, and reliable, MegaTherm® pool
heaters are designed for commercial, institutional and large
residential pools where economical performance and rapid
heat-up are required. Available in indoor and outdoor
models, with twenty-two sizes from 500,000 to 5,000,000
BTU/h to precisely match any heating requirement.
MegaTherm is designed to deliver efficiencies as high as 82%.
Integral finned copper tubes are rolled directly into the headers, and
conformal heat exchanger baffles and an eight-fins-per-inch tubing
configuration maximize combustion heat extraction. We’ve also
designed MegaTherm to be simple to service. Heat exchanger
header covers are field-removable for complete inspection of tubing
and header passages, and the heat exchanger is replaceable
without disassembly of the burners or combustion chamber.
®
MegaTherm is design certified to the ANSI
Gas-Fired Pool Heaters. (Outdoor 500–1825 units are certified for
use without the addition of a draft diverter or external vent. Indoor
units incorporate a built-in draft diverter and require only vent
piping.) Salt water models (500–1825) are available with cupronickel
alloy heat exchanger tubes and bronze headers and header covers.
Z21.56 Standard for
Standard Features
• Reliable operation on natural or propane gas.
• Electronic ignition.
• Built-in draft diverter (indoor models) simplifies installation.
• Flow switch standard on all models.
• Integral pump assures proper water flow (Models 500–1825).
• Automatic gas valve.
• Stainless steel burners, with slide-out burner tray for easy
maintenance and long life (Models 500–1825).
• Galvanized steel jacket with acrylic finish for strength and durability.
• High temperature refractory firebox liner to 2000° F for
greater efficiency.
• Easy-to-service header flanges.
• Corrosion-resistant glass-lined or bronze headers.
• Integral lined copper tube heat exchanger for higher efficiency.
• Electronic temperature control for accuracy. (Models 500–1825;
model configuration varies slightly by size.)
• One-year limited warranty. See warranty for details.
MegaTherm
®
High Performance Gas Fired Commercial Pool Heaters
DIMENSIONAL AND SIZING DATA
Indoor
Sizes 500 –1825
Indoor
Sizes 2000 – 5000
For Indoor Pools Model I
1. Calculate the surface area of the pool in square feet.
2. Refer to the selection chart for either an indoor or outdoor heater.
3. Find the closest square footage in the 10° F (6° C) Temperature Difference column, and the heater models which correspond to it. For normal conditions,
Pentair recommends using the 10° F Temperature Difference columns; this will provide a temperature increase of approximately 6° F per 24 hour period.
Temperature Difference
10° F 6° C 15° F 8° C 20° F 11° C 25° F 14° C 30° F 17° C 35° F 19° C 40° F 22° C 45° F 25° C 50° F 28° C
Model
500 I 3900 362 2600 242 1950 181 1560 145 1300 121 1115 104 975 91 870 81 780 72
Surface Area of Pools (Sq. Ft.)
600 I 4680 435 3120 290 2340 217 1870 174 1560 145 1340 124 1170 109 1040 97 935 87
715 I 5580 518 3720 346 2790 259 2230 207 1860 173 1595 148 1395 130 1240 115 1115 104
850 I 6630 616 4420 411 3315 308 2650 246 2210 205 1895 176 1660 154 1475 137 1325 123
1010 I 7880 732 5250 488 3940 366 3150 293 2625 244 2259 210 1970 183 1750 163 1575 146
1200 I 9360 870 6240 580 4680 435 3745 348 3120 290 2675 249 2340 217 2080 193 1870 174
1430 I 11155 1036 7435 691 5580 518 4460 414 3720 346 3190 296 2790 259 2480 230 2230 207
1670 I 13025 1210 8685 807 6515 605 5210 484 4340 403 3720 346 3260 303 2895 269 2605 242
1825 I 14235 1322 9490 882 7120 661 5695 528 4745 441 4070 378 3560 331 3165 294 2850 265
2000 I 16400 1524 10935 1016 8200 819 6560 609 5465 508 4685 435 4100 381 3645 339 3280 305
2450 I 20090 1866 13395 1244 10045 933 8035 746 6695 622 5740 533 5025 467 4465 415 4020 373
3050 I 25010 2323 16675 1549 12505 1162 10000 929 8335 744 7145 664 6255 581 5560 517 5000 465
3500 I 28700 2666 19135 1778 14350 1333 11480 1066 9565 889 8200 764 7175 667 6380 593 5740 533
4050 I 33210 3085 22140 2057 16605 1543 13285 1234 11070 1028 9490 882 8300 771 7380 686 6640 617
4500 I 36900 3428 24600 2285 18450 1714 14760 1371 12300 1143 10545 980 9225 857 8200 762 7380 686
5000 I 41000 3809 27335 2539 20500 1904 16400 1524 13665 1269 11715 1088 10250 952 9110 846 8200 762
Dimensional Data
Shipping
Indoor Input1 Output
Size MBTU/h kw MBTU/h kw Nat
500 I 500 147 405 119 1 3⁄4 21⁄2 333⁄4 86 451⁄4 115 233⁄4 60 10 25 808 367
1
Gas Conn. Size
-
600 I 600 176 486 143 1
715 I 715 210 579 170 1
850 I 850 249 689 202 1
1010 I 1010 296 818 240 1
1200 I 1200 352 972 285 1
1430 I 1430 419 1158 339 1
1670 I 1670 489 1353 396 1
1825 I 1825 535 1478 433 1
2000 I 2000 586 1639 480 1
2450 I 2450 718 2009 589 1
1
1
1
1
1
1
1
3050 I 3050 894 2501 733 2 1
3500 I 3500 1025 2870 841 2 1
4050 I 4050 1186 3321 973 2 2 4 100
4500 I 4500 1318 3690 1081 2
5000 I 5000 1465 4100 1201 2
NOTES: 1. Input and output must be derated 4% per 1000 feet above sea level when installed above 2000 feet altitude.
2. Dimensions are nominal.
3. Integral pump included on sizes 500-1825.
1
1
Water Conn. Size2
2
inches NPT
- inches Dimensions2 - inches cm Weight3
LP NPT A B C V lbs. kg
3
⁄4 21⁄2 383⁄4 98 501⁄4 128 223⁄4 58 12 30 819 372
3
⁄4 21⁄2 441⁄4 112 553⁄4 142 223⁄4 58 12 30 873 396
3
⁄4 21⁄2 503⁄4 129 621⁄4 158 213⁄4 55 14 36 945 429
⁄4 1 21⁄2 58 147 691⁄2 177 203⁄4 53 16 41 1041 473
⁄4 1 21⁄2 661⁄4 168 773⁄4 197 203⁄4 53 16 41 1199 544
⁄4 11⁄4 21⁄2 76 193 871⁄2 222 193⁄4 50 18 46 1280 581
⁄2 11⁄4 21⁄2 851⁄2 217 97 246 193⁄4 50 18 46 1445 656
⁄2 11⁄4 21⁄2 921⁄2 235 1033⁄4 264 193⁄4 50 18 46 1570 713
⁄2 11⁄4 4 551⁄2 141 73 185 241⁄2 62 22 56 1950 885
⁄2 11⁄2 4 651⁄2 166 83 211 241⁄2 62 24 61 2100 913
1
⁄2 4 78 198 951⁄2 243 241⁄2 62 26 66 2250 1022
1
⁄2 4 88 224 1051⁄2 268 241⁄2 62 28 71 2510 1140
1
⁄2 255 118 300 241⁄2 62 30 76 2750 1249
⁄2 2 4 1101⁄2 281 128 325 241⁄2 62 32 81 2900 1317
⁄2 2 4 123 312 1401⁄2 357 241⁄2 62 34 86 3200 1453
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