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Installation and Operation
Instructions for
TM
MegaTherm
Pool Heating Boiler
Model MT
Sizes 500 - 1825
IMPORTANT: Store these instructions in the
pocket provided on the heater
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 install
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Pentair Water Commercial Pool and Spa Page 2 TABLE OF CONTENTS SECTION 1. SECTION 3. General Information Operation 1.1 Introduction................................................... 3 3.1 Controls - General ...................................... 11 1.2 Heater Identification ..................................... 3 3.2 Initial Start-Up ............................................. 11 1.3 Primary/Secondary Pump and Piping........... 3 3.3 Safety Shutoff Component Checkout ......... 12 1.4 Certific
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MegaTherm Commercial Pool Heating Boiler Page 3 American Society of Mechanical Engineers safety SECTION 1. codes for controls and safety devices for automatically General Information fired heaters No. CSD-1, and in Canada CGA 3.3. Any modification of the heater, its gas controls, gas 1.1 Introduction orifices, wiring or drafter diverter may void the This manual provides information for the warranty. If field conditions require such installation and operation of MegaTherm model MT modifications,
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Pentair Water Commercial Pool and Spa Page 4 SECTION 2. Clearance Indoor Outdoor from in. mm in. mm Installation Top 30 762 unobstructed 2.1 Boiler Placement The pool heating boiler must be placed to Water Conn. side 12* 305 24 610 provide specific clearances on all sides for Pump side 6* 152 24 610 maintenance and inspections. There must also be minimum distances maintained from combustible Front Alcove* unobstructed surfaces. These clearances also apply to Rear 8 203 24 610 noncombustible mate
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Pentair Water Commercial Pool and Spa Page 6 Always use double-wall or insulated vent pipe 5. Test for spillage at the draft hood relief opening (Type B or equivalent). In cold weather, uninsulated after 5 minutes of main burner operation. Use the outside vents can chill the rising flue products flame of a match or candle, or smoke from a blocking the natural draft action of the venting cigarette, cigar, or pipe. systems. This can create a health hazard by spilling 6. After it has been determine
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MegaTherm Commercial Pool Heating Boiler Page 7 flamme d’une chandelle ou la fumée d’une Boiler Each Opening* cigarette, d’une cigare ou d’une pipe. Size square inches square cm 6. Une fois qu’il a été déterminé, selon la méthode 500 125 806.5 indiquée ci-dessus, que chaque appareil raccordé 600 150 967.8 au systéme d’évacuation est mis à l’air libre de 715 179 1154.9 façon adéquate. Remettre les portes et les 850 213 1374.3 fenêtres, les ventilateurs, les registres de 1010 253 1632.4 cheminées
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Pentair Water Commercial Pool and Spa Page 8 6. The correct burner manifold gas pressure is Distance from Gas Meter stamped on the rating plate. The regulator is Boiler or Last Stage Regulator preset at the factory and normally requires no Size 0-100' 100-200' 200-300' further adjustment. 0-30.5m 30.5-61m 61-91.4m The gas manifold and control assembly is 500 1½" 2" 2" factory tested and conforms to the safe lighting and 600 1½" 2" 2½" other performance criteria specified in the latest 715 2" 2"
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MegaTherm Commercial Pool Heating Boiler Page 9 When pipe, fittings, grids or any other element of the filter system are made of plastic materials, they may be damaged by the momentary "back siphoning" of hot water from the heater when the filter pump stops running. The pressure relief valve installed in the tapped opening provided in the outlet header (see Figure 9), must be piped, but not connected, to a drain or floor sink. The drain pipe must be the same size as the valve outlet and must pit
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Pentair Water Commercial Pool and Spa Page 10 2.8 Temperature Sensor Placement and Installation A temperature sensor with 15 feet (5m) of cable and an immersion well assembly are supplied with the boiler. These must be installed in the field. Refer to Figures 10 through 11. 1. The immersion well body is provided with a 1/2" NPT. Mount the immersion well on the underside of the filter circulation piping, just upstream of the boiler inlet tee as close to the boiler as possible (see Figure 10). DO
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MegaTherm Commercial Pool Heating Boiler Page 11 The manual reset high limit switch is provided as SECTION 3. standard equipment on all boilers. The Operation temperature sensing bulb of the switch is always 3.1 Controls - General located in the heater outlet. Burners will automatically shut down whenever overheating (see Figures 12 and 13) of water occurs. 1. Electronic Ignition Controls: 5. Flow Switch: a. Intermittent Ignition: Standard on all model MT pool heating boilers. Pilots are automat
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Pentair Water Commercial Pool and Spa Page 12 and the pilot spark ignition is initiated until the pilot On a newly constructed pool, be sure to run the flame has been reestablished. This sequence should be filter pump long enough for a complete “turn-over” of checked by turning off the manual pilot gas valve (see the pool water before starting heater so that dirt and Figure 14), and, at the same time, monitoring the residue from construction will have been removed. audible sparking at the pilot
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MegaTherm Commercial Pool Heating Boiler Page 13 If the inlet temperature is LESS THAN 100°F: Manual Reset Flow Low Water With the bypass valve “A” fully open, throttle High Limit Switch Cutoff (turn down) outlet valve “B” slightly. Observe (Optional) the inlet thermometer for 5 minutes to see where the inlet temperature stabilizes. If it remains under 100°F, throttle outlet valve “B” a little more. Repeat as necessary. If the inlet temperature rises above 100°F, open outlet valve “B” slight
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Pentair Water Commercial Pool and Spa Page 14 and 1825 pool temperature should be maintained at 3.9 Therapeutic Pools (Spas) 70°F (21°C) or above. See item 3 in the next section. Therapeutic pools or "spa" pools are usually piped and controlled so that very warm or hot water, 7. An adjustable pump time delay relay is mounted often with air injection, is forced at high velocity into in the control panel (see Figure 11). This relay a confined area of a swimming pool or into a small keeps the pump
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MegaTherm Commercial Pool Heating Boiler Page 15 SECTION 4. Pilot Valve Maintenance 1. Lubricate the pump seal every 6 months with ½ oz. of SAE 30 non-detergent oil. Slowly add to pump oil cup located on top of the bearing bracket. 2. At start-up and every six (6) months thereafter, the pilot and main burner flame should be ON POSITION observed for proper performance (see Figure 16). See attached lighting and shut-down instructions Main Gas Valve for proper pilot flame pattern. If flame has the
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Pentair Water Commercial Pool and Spa Page 16 Caution Black carbon or green soot on a dirty heat exchanger can, under certain conditions, be ignited by a random spark or open flame. To prevent this unlikely occurrence, dampen the soot deposits with wet brush or fine water Figure 16. Main Burner Flame Pattern. spray before servicing or cleaning the heat exchanger. 7.7. This will add years to the life of the pool finish, filter system and heater. 9. Clean heat exchanger using a wire brush to Most
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MegaTherm Commercial Pool Heating Boiler Page 17 SECTION 6. PARTS 1. Symptom: heater is pounding, knocking or emitting steam from relief valve Possible Cause What to Do A. Low or no water flow A. Is the heater wired into the filter pump circuit so that the heater cannot fire (most likely). unless the pump is running? Check to see that all valves in system are open to be sure that water can circulate through the heater. Check pool filter, clean if clogged. Examine heater pump for clogged or froze
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Pentair Water Commercial Pool and Spa Page 18 SECTION 6. Parts Description and Order Numbers Key Description Size Size Size Size Size Size Size Size Size No 500 600 715 850 1010 1200 1430 1670 1825 Jacket and Combustion Chamber Components 1 Top Panel Assembly 10535701 10535702 10535703 10535704 10535705 10535706 10535707 10535708 10535709 2 Spacer, Flue Collector - - - 10540800 10540800 10540800 10540800 10540800 10540800 3 End Panel, Flue Collector, Left 10533700 10533700 10533700 10533700 1
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MegaTherm Commercial Pool Heating Boiler Page 19 Figure 17. Parts Identification.
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Pentair Water Commercial Pool and Spa Page 20 Key Description Size Size Size Size Size Size Size Size Size No 500 600 715 850 1010 1200 1430 1670 1825 28 Middle Front Panel {Indoor} 10554401 10554402 10554403 10554404 10554405 10554406 10554407 10662008 10662009 29 Sweep Sheet, Flue Collector {Indoor} 10533901 10533902 10533903 10533904 10533905 10533906 10533907 10662208 10662209 30 Control Box Weldment 10545800 10545800 10545800 10545800 10545800 10545800 10545800 10545800 10545800 31 Control
