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Installation
and Operation
Instructions for
TM
MegaTherm
Pool Heating Boiler
Model MT
Sizes 2000-5000
IMPORTANT: Store these instructions in the packet provided on the boiler
FOR YOUR SAFETY: This product must be installed and serviced by a professional service technician,
qualified in hot water boiler installation and maintenance. Improper installation and/or operation could
create carbon monoxide gas in flue gases which could cause serious injury, property damage, or death.
Improper installati
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Page 2 Pentair Water Commercial Pool and Spa TABLE OF CONTENTS 3D. Spring and Fall Operation ............................ 10 SECTION 1. 3E. Winter Operation ......................................... 10 General Information 3E-1. Draining Boiler Before Freezing ................... 10 1A. Introduction................................................... 3 3E-2. Improper Use of the Boiler ........................... 10 3F. Time Clock Operation .................................. 11 SECTION 2. 3G. Spa (
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MegaTherm Commercial Pool Heating Boiler Page 3 (see page 2), or your local representative, with any SECTION 1. problems or questions regarding this equipment. General Information Experience has shown that most operating problems are caused by improper installation. Model MT boilers are offered in two IMPORTANT WARNING: configurations: an indoor version and an outdoor The MegaTherm Model MT commercial pool version. The indoor version is convertible for outdoor boilers must be used with potable w
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Page 4 Pentair Water Commercial Pool and Spa Clearance Indoor Outdoor All boilers must be installed on a non-combustible From (Inches) (Inches) floor. Under no circumstances can boilers be installed Top 24 — on carpeting. The National Fuel Code allows a boiler Water Conn. Side 24 24 to be placed on other than a non combustible surface Opposite Side 24 24 when such an installation complies with the local Front 48 48 codes. This code specifies the surface under the boiler Rear 24 24 Vent 6 — be pr
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MegaTherm Commercial Pool Heating Boiler Page 5 codes having jurisdiction. When a draft fan is 2B-2. Venting installed, a suitable draft switch must be used 1. Model MT boilers have built-in draft diverters for and wired into the boiler control circuit at natural draft operation and must not be terminal designated “Field Interlock,” to prevent connected into any portion of a mechanical draft firing of the unit unless a positive draft has been system under positive pressure. The flue outlet estab
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Page 6 Pentair Water Commercial Pool and Spa 4. Liquified petroleum is heavier than air. Therefore, the pool boiler should not be installed in pits or other locations where gas could accumulate. The boiler should be located a safe distance from LP gas storage and filling equipment. Consult local codes and fire protection authorities for advice relative to specific installation restrictions. 2D. Freeze Protection Boiler installations are not recommended in areas where the danger of freezing exist
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MegaTherm Commercial Pool Heating Boiler Page 7 4. All field installed electrical safety devices and all Note: field installed devices (draft switches, relays, Main Gas Valves Incorporate timers, etc.) can be connected to the boiler Gas Pressure Regulators wiring at points shown in the wiring diagram designated “Field Interlock.” 5. Auxiliary Time Clock Wiring. If a time clock is used to control the filter pump operation, a separate switch must be used to shut off the boiler at least 15 minutes
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Page 8 Pentair Water Commercial Pool and Spa Figure 8. Thermometer Location. Figure 7. Manual By-Pass Installation. Bypass Min. Max. Temp. Therefore, the temperature difference between Spring Flow Bypass Rise the inlet and out pipes will be so small as to be Indoor Outdoor Part Color Req'd Valve at Rear Size Size No. Code (GPM)Cap. (GPM) Header difficult to sense by touching the two pipes. 2000 ------ S220 Black 110 300 15 2I. Boiler By-Pass Piping 2450 2200 S221 White 134 300 15 All Mode
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MegaTherm Commercial Pool Heating Boiler Page 9 pool. If this condition exists, follow this procedure to manual pilot valves in the open position, and adjust the switch: resetting all safety devices (high limit, pressure switch, Low-Water-Cutoff, etc.), 1. With the boiler on, the filter pump running and pilots can be lit following the procedure the filter clean, slowly increase the pressure located on the boiler rating plate. setting until the boiler shuts off. Slowly decrease the pressure setti
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Page 10 Pentair Water Commercial Pool and Spa 3A-3. Hi-Limit Checkout 3C. To Turn Off Boiler After running the boiler for a long enough period 1. Turn off main electrical switch. to bring the water temperature within the range of the 2. Close all manual gas valves. hi-limit, slowly back off the high limit setting until the unit shuts off. The main burners should re-ignite when the hi-limit is turned back up to its original setting. 3D. Spring and Fall Operation The high limit should now be reset
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MegaTherm Commercial Pool Heating Boiler Page 11 3F. Time Clock Operation 3H. Periodic Service During the initial warm-up period, the boiler Inspect the heat exchanger tubes of the Model must run continuously. Therefore, remove all time MT pool boiler on a regular basis. In most areas and clock stops until the pool water reaches a temperature under most operating conditions, the MT pool boiler o of at least 70 F. will operate for years without accumulating any scale When resetting the time clock
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Page 12 Pentair Water Commercial Pool and Spa with a flashlight by locating a mirror under the burners. SECTION 4. An alternate method is to remove the venting and top Maintenance panel as necessary to inspect from above. Also, check the vent system for defects at the same time. 1. At start-up and every six (6) months thereafter, the pilot and main burner flame should be a. If cleaning is required, shut off all electrical observed for proper performance (see Figures 9 and gas supply to the boile
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MegaTherm Commercial Pool Heating Boiler Page 13 SECTION 5. Boiler is Pounding, Knocking, or Emitting Steam from Relief Valves Troubleshooting and Analysis of Possible Cause What To Do Service Problems Lower or no water This condition is usually caused by flow. lack of adequate water flow through 1. For proper service and problem diagnosis of the heater. check the following: boiler and system, the following tools are 1. Is the heater wired into the pump required: circuit so that the heater canno
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Page 14 Pentair Water Commercial Pool and Spa SECTION 6. Conversion of Model MT Pool Boilers From Indoor to Outdoor Models Please read the following instructions with Figure 11. Figure 12 shows the conversion completed. Please follow the instructions in their numerical order, failure to do this will cause problems on assembly. 6A. SECTION I (See Figure 11) 1. Remove top panel. (1) 2. Remove front and rear upper panels, (2). 3. Remove front and rear wings LH & RH, (3). 4. Remove diverter assembly
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MegaTherm Commercial Pool Heating Boiler Page 15 Figure 12. Outdoor Parts. Referenced on page 14.
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Page 16 Pentair Water Commercial Pool and Spa SECTION 7. Parts Description and Order Numbers Key Size Size Size Size Size Size Size No. Description 2000 I 2450 I 3050 I 3500 I 4050 I 4500 I 5000 I 2200 E 2800 E 3200 E 3600 E 4000 E 4500 E 1. Base Weldment Assembly 20067201 20067202 20067203 20067204 20067205 20067206 20067207 2. Base Assembly 20011001 20011002 20011003 20011004 20011005 20011006 20011007 3. Center Heat Shield Assembly 20005701 20005702 20005703 20005704 20005705 20005706 2000570
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MegaTherm Commercial Pool Heating Boiler Page 17 *Indoor parts only **For tiles, see Figure 15. Figure 13. Parts Identification.
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Page 18 Pentair Water Commercial Pool and Spa Key Size Size Size Size Size Size Size No. Description 2000 I 2450 I 3050 I 3500 I 4050 I 4500 I 5000 I 2200 E 2800 E 3200 E 3600 E 4000 E 4500 E 3 22. Lock Washer - /8" F0010800 F0010800 F0010800 F0010800 F0010800 F0010800 F0010800 (2) (2) (2) (2) (2) (2) (2) 3 23. Washer - /8" F0011100 F0011100 F0011100 F0011100 F0011100 F0011100 F0011100 (2) (2) (2) (2) (2) (2) (2) 24. Cap Screw F0015900 F0015900 F0015900 F0015900 F0015900 F0015900 F0015900 3 /8"
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MegaTherm Commercial Pool Heating Boiler Page 19 Key Size Size Size Size Size Size Size No. Description 2000 I 2450 I 3050 I 3500 I 4050 I 4500 I 5000 I 2200 E 2800 E 3200 E 3600 E 4000 E 4500 E 48. Manual Pilot Valve W0002100 W0002100 W0002100 W0002100 W0002100 W0002100 W0002100 (2) (2) (2) (2) (2) 49(a). Pilot Valve (I.I.D.) W0019300 W0019300 W0019300 W0019300 W0019300 W0019300 W0019300 (not shown) (2) (2) (2) (2) (2) 49(b). Pilot Relay (Standing Pilot) W003000 W003000 W003000 W003000 W003000
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Figure 15. Tile Assembly. © 2006 Pentair Water Pool and Spa, Inc. All rights reserved This document is subject to change without notice 1620 Hawkins Ave., Sanford, NC 27330 � (919) 566-8000 10951 West Los Angeles Ave., Moorpark, CA 93021 � (805) 553-5000 Trademarks and disclaimers MegaTherm and the Pentair Commercial Pool and Spa logo are trademarks of Pentair Water Pool and Spa, Inc. Other trade- marks and trade names may be used in this document to refer to either the entities claiming the mar
