®
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.
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.
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.
• 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.
MegaTherm is design certified to the ANSI® Z21.56 Standard for
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.
• 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.
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Outdoor
Outdoor
Sizes 2000 – 5000
Sizes 500 –1825
For Outdoor Pools Model E
1. Determine the difference between the desired pool temperature and the average air temperature during the coldest month in which the
pool will be used (referred to in the chart below as “Temperature Difference”).
2. Calculate the surface area of the pool.
3. Refer to the selection chart. Listed are the maximum pool surface areas for each heater model with typical temperature differences.
Make the appropriate selection from the chart.
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 E
600 E
715 E
850 E
1010 E
1200 E
1430 E 11440 1063
1670 E 13360 1241
1825 E 14600 1356
2200 E 17861 1659
2800 E 22235 2066
3200 E 25515 2370
3600 E 29525 2743
4000 E 32805 3048
4500 E 36450 3386
Surface Area of Pools (Sq. Ft.)
4000
4800
5720
6800
8080
9600
372
446
531
632
751
892
2665
3200
3810
4530
5385
6400
7625
8905
9730
248
297
354
421
500
595
708
827
904
2000
2400
2860
3400
4040
4800
5720
6680
7300
8930
186
223
266
316
375
446
531
621
678
830
1600
1920
2285
2720
3230
3840
4575
5344
5840
7144
149
178
212
253
300
357
425
496
543
664
826
948
1330
1600
1905
2265
2690
3200
3810
4450
4865
5954
7412
8505
9842
124
149
177
210
250
297
354
413
452
553
689
790
914
1140
1370
1630
1940
2305
2740
3265
3815
4170
5103
6353
7290
8436
9373
106
127
151
180
214
255
303
354
387
474
590
677
784
871
967
1000
1200
1430
1700
2020
2400
2860
3340
3650
4465
5559
6379
7381
8201
9113
93
885
82
99
800
960
74
89
111
133
158
188
223
266
310
339
415
516
593
686
762
847
1065
1270
1510
1795
2130
2540
2965
3240
3969
4941
5670
6561
7290
8100
118
140
167
198
236
275
301
369
459
527
610
677
752
1140
1360
1615
1920
2285
2670
2920
3572
4447
5103
5905
6561
7290
106
126
150
178
212
248
271
332
413
474
549
610
677
11907 1106
14823 1377 11117
17010 1580 12758
19683 1829 14762
21870 2032 16403
24300 2257 18225
1033 8894
1185 10206
1371 11810 1097
1524 13122 1219 10935 1016
1693 14580 1354 12150 1129 10414
NOTES: 1. For high altitude pools, reduce the surface area figures shown in the charts by 4% for each 1000 ft. above sea level. (No derating is necessary up to 2000 ft. above sea level.)
2. Pentair maintains a policy of continuous improvements and therefore reserves the right to change specifications without notice.
3. Sizing for outdoor pools is based on 31⁄2 mph average wind.
Dimensional Data
gas Conn.Size Water Conn.Size2
Outdoor
Input1
Output1
-
inches NPt2
Nat LP
3
- inches
Dimensions2 - inches cm
Outdoor
Shipping Weight3
Size
MBtU/h kw
MBtU/h kw
NPt
A
B
C
D
E
F
V
Size
lbs.
kg
500 E 500 147 410 120
600 E 600 176 492 144
715 E 715 210 586 172
850 E 850 249 697 204
1
1
1
1
⁄
⁄
⁄
⁄
1
1
4
4
4
4
21⁄2
21⁄2
21⁄2
21⁄2
21⁄2
21⁄2
21⁄2
21⁄2
21⁄2
4
333⁄4 86 451⁄4 115
383⁄4 98 501⁄4 128
441⁄4 112 551⁄4 142
503⁄4 129 621⁄4 158
58 147 691⁄2 177
661⁄4 168 773⁄4 197
76 193 871⁄2 222
851⁄2 217 97 246
921⁄2 235 1033⁄4 264
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
— — — — — — — —
— — — — — — — —
— — — — — — — —
— — — — — — — —
— — — — — — — —
— — — — — — — —
— — — — — — — —
— — — — — — — —
— — — — — — — —
500 E 500 147
600 E 600 176
715 E 715 210
850 E 850 249
1010 E 1010 296
1200 E 1200 352
1430 E 1430 419
1670 E 1670 489
1825 E 1825 535
2200 E 2205 646
2800 E 2745 804
3200 E 3150 923
3600 E 3645 1068
4000 E 4050 1187
4500 E 4500 1319
3
3
3
1010 E 1010 296 828 243 11⁄4
1200 E 1200 352 984 288 11⁄4
1430 E 1430 419 1173 344 11⁄4 11⁄4
1670 E 1670 489 1370 401 11⁄2 11⁄4
1825 E 1825 535 1497 439 11⁄2 11⁄4
2200 E 2205 646 1786 523 11⁄2 11⁄4
2800 E 2745 804 2223 651 11⁄2 11⁄2
651⁄2 166 83 211 16 41 281⁄4 72 15 38 24 61 18 46
78 198 951⁄2 243 20 51 281⁄4 72 15 38 24 61 18 46
88 224 1051⁄2 268 23 58 311⁄2 80 161⁄2 42 36 91 20 51
1001⁄2 255 118 300 29 74 311⁄2 80 161⁄2 42 36 91 20 51
1101⁄2 281 128 325 301⁄2 77 341⁄2 88 18 46 36 91 22 56
123 312 1401⁄2 357 34 86 373⁄4 96 191⁄2 50 36 91 24 61
4
4
4
3200 E 3150 923 2552 748
2
2
11⁄2
2
3600 E 3645 1068 2952 865
4000 E 4050 1187 3281 961 21⁄2
2
4
4500 E 4500 1319 3645 1068 21⁄2
2
4
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.
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®
MegaTherm
High Performance Gas Fired Commercial Pool Heaters
the Perfect Combination of Accurate Control,
Part Numbers
Descriptions
Efficiency, and Long Life
MT0500IN09C1PC
MT0600IN09C1PC
MT0715IN09C1PC
MT0850IN09C1PC
MT0999IN09C1PC
MT1010IN09C1PC
MT1200IN09C1PC
MT1430IN09C1PC
MT1670IN09CBPC
MT1825N09CBPC
MT2000IN18CCAC
MT2450IN18CCAC
MT3050IN18CCAC
MT3500IN18CCAC
MT4050IN18CCAC
MT4500IN18CCAC
MT5000IN18CCAC
Indoor, Spark Ignition, On-Off, Pump Mtd., Cl-Cu HX, Std. Unit, Nat. Gas
Indoor, Spark Ignition, On-Off, Pump Mtd., Cl-Cu HX, Std. Unit, Nat. Gas
Indoor, Spark Ignition, On-Off, Pump Mtd., Cl-Cu HX, Std. Unit, Nat. Gas
Indoor, Spark Ignition, On-Off, Pump Mtd., Cl-Cu HX, Std. Unit, Nat. Gas
Indoor, Spark Ignition, On-Off, Pump Mtd., Cl-Cu HX, Std. Unit, Nat. Gas
Indoor, Spark Ignition, On-Off, Pump Mtd., Cl-Cu HX, Std. Unit, Nat. Gas
Indoor, Spark Ignition, On-Off, Pump Mtd., Cl-Cu HX, Std. Unit, Nat. Gas
Indoor, Spark Ignition, On-Off, Pump Mtd., Cl-Cu HX, Std. Unit, Nat. Gas
Indoor, Spark Ignition, On-Off, Pump Mtd., Cl-Cu HX, Std. Unit, Nat. Gas
Indoor, Spark Ignition, On-Off, Pump Mtd., Cl-Cu HX, Std. Unit, Nat. Gas
Indoor, Spark Ignition, Less Pump, Cl-Cu HX, Std. Unit, Nat. Gas
Indoor, Spark Ignition, Less Pump, Cl-Cu HX, Std. Unit, Nat. Gas
Indoor, Spark Ignition, Less Pump, Cl-Cu HX, Std. Unit, Nat. Gas
Indoor, Spark Ignition, Less Pump, Cl-Cu HX, Std. Unit, Nat. Gas
Indoor, Spark Ignition, Less Pump, Cl-Cu HX, Std. Unit, Nat. Gas
Indoor, Spark Ignition, Less Pump, Cl-Cu HX, Std. Unit, Nat. Gas
Indoor, Spark Ignition, Less Pump, Cl-Cu HX, Std. Unit, Nat. Gas
MegaTherm® is packed with performance features designed specifically
for the commercial, institutional, and large residential pool market.
The primary/secondary pump and control (Models 500–1825) feature
an electronic controller with a solid state sensor and adjustable
differential for accurate temperature control. Inlet water is preheated
to eliminate condensation, and a constant velocity in the heat
exchanger increases tube life. The diverter valve has been eliminated
in the pool circulation line, resulting in lower installation and operating
costs. And, inlet and outlet thermometers with 1% accuracy allow
precise set-up and temperature rise monitoring.
Additional Design Advantages Include:
•Control system includes automatic temperature control, temperature
limit, gas pressure regulator, redundant electric gas valve, water
flow sensing, electronic flame safety supervision and manual gas
shut-off valve. The standard control system operates on 24 VAC
with a 120 VAC power supply. Standard units are intermittent
(spark) ignition.
MT2200EN18CCAC Outdoor, Spark Ignition, Less Pump, Cl-Cu HX, Std. Unit, Nat. Gas
MT2800EN18CCAC Outdoor, Spark Ignition, Less Pump, Cl-Cu HX, Std. Unit, Nat. Gas
MT3200EN18CCAC Outdoor, Spark Ignition, Less Pump, Cl-Cu HX, Std. Unit, Nat. Gas
MT3600EN18CCAC Outdoor, Spark Ignition, Less Pump, Cl-Cu HX, Std. Unit, Nat. Gas
MT4000EN18CCAC Outdoor, Spark Ignition, Less Pump, Cl-Cu HX, Std. Unit, Nat. Gas
MT4500EN18CCAC Outdoor, Spark Ignition, Less Pump, Cl-Cu HX, Std. Unit, Nat. Gas
MT2200EN18CCAN Outdoor, Spark Ignition, Less Pump, Cl-Cu-Ni HX, Std. Unit, Nat. Gas
MT2800EN18CCAN Outdoor, Spark Ignition, Less Pump, Cl-Cu-Ni HX, Std. Unit, Nat. Gas
MT3200EN18CCAN Outdoor, Spark Ignition, Less Pump, Cl-Cu-Ni HX, Std. Unit, Nat. Gas
MT3600EN18CCAN Outdoor, Spark Ignition, Less Pump, Cl-Cu-Ni HX, Std. Unit, Nat. Gas
MT4000EN18CCAN Outdoor, Spark Ignition, Less Pump, Cl-Cu-Ni HX, Std. Unit, Nat. Gas
MT4500EN18CCAN Outdoor, Spark Ignition, Less Pump, Cl-Cu-Ni HX, Std. Unit, Nat. Gas
•Working pressure of 160 psi complies with Section IV of the ASME®
Boiler and Pressure Vessel Code. Units are registered with the
National Board of Boiler and Pressure Vessel Inspectors.
•
Pressure relief valve is ASME® rated and is selected to provide
discharge capacity in excess of unit heating input.
•
Combustion chamber is cast refractory with a 2000° F (1093° C)
working temperature.
•Burners are atmospheric type constructed of AISI alloy 430 (models
500–1825) or AISI 439 (models 2000–5000) stainless steel.
•Chassis and jacket parts are of galvanized steel meeting ASTM®
Standard for G90 coating. Exterior is finished with acrylic paint,
thermoset at 325° F (163° C).
Cupronickel alloy heat exchanger models are available. Contact the factory for part numbers.
•
Integral flow control valve on models 2000–5000 accepts flows
up to 300 GPM.
1620 Hawkins Avenue
Sanford, NC 27330
Phone: 800-831-7133 Fax: 800-284-4151
6/08 Part #P1-355
©2008 Pentair Water Pool and Spa, Inc. All rights reserved.
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