Pentair Swimming Pool Heater 5001825 User Manual

®
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.  
 
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 312 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
212  
212  
212  
212  
212  
212  
212  
212  
212  
4
3334 86 4514 115  
3834 98 5014 128  
4414 112 5514 142  
5034 129 6214 158  
58 147 6912 177  
6614 168 7734 197  
76 193 8712 222  
8512 217 97 246  
9212 235 10334 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 296 828 243 114  
1200 E 1200 352 984 288 114  
1430 E 1430 419 1173 344 114 114  
1670 E 1670 489 1370 401 112 114  
1825 E 1825 535 1497 439 112 114  
2200 E 2205 646 1786 523 112 114  
2800 E 2745 804 2223 651 112 112  
6512 166 83 211 16 41 2814 72 15 38 24 61 18 46  
78 198 9512 243 20 51 2814 72 15 38 24 61 18 46  
88 224 10512 268 23 58 3112 80 1612 42 36 91 20 51  
10012 255 118 300 29 74 3112 80 1612 42 36 91 20 51  
11012 281 128 325 3012 77 3412 88 18 46 36 91 22 56  
123 312 14012 357 34 86 3734 96 1912 50 36 91 24 61  
4
4
4
3200 E 3150 923 2552 748  
2
2
112  
2
3600 E 3645 1068 2952 865  
4000 E 4050 1187 3281 961 212  
2
4
4500 E 4500 1319 3645 1068 212  
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.  
 
®
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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