MASTERTEMP 125 HIGH PERFORMANCE HEATER …...Rev. A 11/13 ® MASTERTEMP 125 Pool and Spa Heater Installation and User’s Guide. 7 The MasterTemp ® 125 Heater is designed and manufactured

MASTERTEMP®125

DO NOT store or use gasoline or other flammable vapors and liquids in the vicinity of this or other appliances.

FOR YOUR

SAFETY

Improper installation, adjustment, alteration, service or maintenance can cause propertydamage, personal injury or death. Installation and service must be performed by a qualified installer, service agency or the gas supplier.

WHAT TO DO IF YOU SMELL GAS• Do not try to light any appliance.• Do not touch any electrical switch; do not use any phone in your building.• Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions.• If you cannot reach your gas supplier, call the fire department.

Pentair Water Pool and Spa, Inc. 1620 Hawkins Ave., Sanford, NC 27330 • (800) 831-7133 or (919) 566-8000

10951 W. Los Angeles Ave., Moorpark, CA 93021 • (800) 831-7133 or (805) 553-5000

FOR YOUR SAFETY - This product must be installed and serviced by authorized personnel, qualified inpool/spa heater installation. Improper installation and/or operation can create carbon monoxide gas and flue gases which can cause serious injury, property damage, or death. For indoor installations, as an additional measure of safety, Pentair Aquatic Systems strongly recommends installation of suitable Carbon Monoxide detectors in the vicinity of this appliance and in any adjacent occupied spaces. Improper installation and/or operation will void the warranty.

FOR YOUR SAFETY - READ BEFORE OPERATINGIf you do not follow these instructions exactly, a fire or explosion may result, causing property damage, personal injury or loss of life. For additional free copies of this manual; call (800) 831-7133.

OWNER: Retain For

FutureReference

Models Natural Propane125K BTU/HR (without cord) 461058 461060 125K BTU/HR (with cord) 461059 461061

120/240 VAC NATURAL GAS/LP GAS

INSTALLATION AND USER’S GUIDEHIGH PERFORMANCE HEATER

MASTERTEMP® 125 Pool and Spa Heater Installation and User’s Guide Rev. A 11/13

2

Customer Service and Tecnincal SupportIf you have questions about ordering Pentair Aquatic Systems replacement parts, and pool products, please call:

Phone: (800) 831-7133 - (8 AM to 4:30 PM Pacific Time and Eastern Time) Fax: (800) 284-4151

Web sites: www.pentairpool.com - www.staritepool.com

P/N 475000 Rev. A

Rev. A 11/13 MASTERTEMP® 125 Pool and Spa Heater Installation and User’s Guide

3 ContentsSection 1. Heater Identification Information ......................................................................... 4Section 2. Warning and Safety Information .......................................................................... 5 Important Notices ................................................................................................................................................................................. 5 Warranty Information ............................................................................................................................................................................ 5 Code Requirements .............................................................................................................................................................................. 6 Consumer Information and Safety Information ..................................................................................................................................... 6 - 9 General Specifications .......................................................................................................................................................................... 9Section 3. Installation .............................................................................................................. 10 Heater Description ................................................................................................................................................................................ 10 Putting the Heater into Service ............................................................................................................................................................. 10 Specifications ....................................................................................................................................................................................... 11 Plumbing Connections .......................................................................................................................................................................... 12 Valves ................................................................................................................................................................................................... 12 Manual By-Pass ................................................................................................................................................................................... 12 Water Connections ............................................................................................................................................................................... 13 Below Pool Installation ......................................................................................................................................................................... 13 Gas Connections .................................................................................................................................................................................. 14 Sediment Traps ................................................................................................................................................................................... 14 Gas Pipe Sizing .................................................................................................................................................................................... 15 Testing Gas Pressure/Gas Pressure Requirements ............................................................................................................................. 15 Outdoor Installation (US and Canada) / Heater Clearances ................................................................................................................ 16 Outdoor Installation Venting Guidelines .............................................................................................................................................. 17 Indoor Venting — General Requirements (Category I and Category III requirements) ...................................................................... 17 Heater Clearances — General Requirements (Indoor Installation for US or Outdoor Shelter for Canada) ....................................... 18 Outside Vent Cover Removal ............................................................................................................................................................... 18 Combustion Air Supply ......................................................................................................................................................................... 18 Direct Air Intake Exhaust Duct using 3-inch PVC Pipe (Indoor Installation) / Corrosive Vapors and Possible Causes ........................ 19 Vent Installation (Indoor Installation for U.S. or Outdoor Shelter for Canada) ...................................................................................... 20 Vertical Venting - Negative Pressure ................................................................................................................................................... 20 - 22 Horizontal or Vertical Venting - Positive Pressure ............................................................................................................................... 23 Connecting Special Gas Venting .......................................................................................................................................................... 23 - 25 Outdoor Shelter Vent Installation .......................................................................................................................................................... 26 Garage or Utility Room Installation ....................................................................................................................................................... 26 Control Panel Indexing ......................................................................................................................................................................... 27 Final Installation Check ........................................................................................................................................................................ 27 Electrical Connections .......................................................................................................................................................................... 28 Fireman’s Switch Connection/Remote Control Connections ................................................................................................................ 29 MasterTemp® 125 Heater Wiring Diagram ........................................................................................................................................... 30 Electrical Schematic Ladder Diagram .................................................................................................................................................. 31Section 4. Operation ................................................................................................................ 32 Basic System Operation ....................................................................................................................................................................... 32 HSI (Hot-Surface Ignition) Lighting/Operation ...................................................................................................................................... 32 Operating ............................................................................................................................................................................................. 33 To Turn Off Gas to Appliance ................................................................................................................................................................ 33 Safety Controls ..................................................................................................................................................................................... 34 - 36Section 5. Troubleshooting .................................................................................................... 37 Initial Troubleshooting and Troubleshooting Chart ............................................................................................................................... 38 Heater Will Not Fire Troubleshooting .................................................................................................................................................... 39 - 42 LED Diagnostics ................................................................................................................................................................................... 43 - 44 Burner / Heat Exchanger Troubleshooting ........................................................................................................................................... 45Section 6. Maintenance ........................................................................................................... 45 Care and Maintenance ......................................................................................................................................................................... 46 Pressure Relief Valve ........................................................................................................................................................................... 45 After Start-Up ........................................................................................................................................................................................ 46 Spring, Fall and Winter Operation ........................................................................................................................................................ 46 Maintaining Pool Temperature .............................................................................................................................................................. 47 Energy Saving Tips ............................................................................................................................................................................... 48 Chemical Balance ................................................................................................................................................................................. 47 - 48 Replacement Parts ............................................................................................................................................................................... 49 - 53


4

Toidentifytheheater,seeratingplateontheinnerfrontpaneloftheheater.Therearetwodesignatorsforeachheater,oneistheModelNumberandtheotheristheHeaterIdentificationNumber(HIN).a. HeaterIdentificationNumber(HIN)

Thefollowingexamplesimplifiestheidentificationsystem:

1) MT:MasterTemp®125

2) Model Size:(125):Inputrating(Btu/hr)X1000

3) Fuel Type :(LP=PropanegasorNA=Naturalgas)

4) Construction : (STD=StandardModel)

Section 1. Heater Identification Information

Section 1: Heater Identification Information

HEATER IDENTIFICATION INFORMATION — (HIN)

MT 125 NA STD

MT = MASTERTEMP

FUEL TYPE =

CONSTRUCTION =

MODEL SIZE = BTU INPUT in 1000 of BTU / HR

H. I. N.HEATER IDENTIFICATION NUMBER

ID DESIGNATOR FOR PENTAIR AQUATIC SYSTEMS MASTERTEMP 125 HEATER

NA = NATURAL GAS

LP = PROPANE GAS

Example: 1 2 3 4

®

STD = STANDARD MODEL


5

CongratulationsonyourpurchaseofaMasterTemp®125highperformanceheatingsystem.Proper installationandserviceofyournewheatingsystemandcorrectchemicalmaintenanceofthewaterwillensureyearsofenjoyment.TheMasterTemp®125heaterisacompact,lightweight,efficient,induced-draft,gasfiredhighperformancepoolandspaheaterthatcanbedirectlyconnectedtoschedule40PVCpipe.TheheateralsocomesequippedwiththePentairmultifunctiontemperaturecontrollerwhichshows,ataglance,theproperfunctioningoftheheater.AllMasterTemp®125heatersaredesignedwithadirectignitiondevice,HSI(hot-surfaceignition),whicheliminatestheneedforastandingpilot.TheMasterTemp®125heaterrequiresanexternalpowersource(120/240VAC60Hz)tooperate.SPECIALINSTRUCTIONSTOOWNER:Retainthismanualforfuturereference.Thisinstructionmanualprovidesoperating instructions, installationandservice information for theMasterTemp®125highperformanceheater.TheinformationinthismanualappliestoallMasterTemp®125heatermodels.READANDREVIEWTHISMANUALCOMPLETELY, it isvery important that theowner/installer readandunderstand the sectioncovering installationinstructions,andrecognizethelocalandstatecodesbeforeinstallingtheMasterTemp®125heater.Itsusewillreduceservicecallsandchanceofinjuryandwilllengthenproductlife.Historyandexperiencehasshownthatmostheaterdamageiscausedbyimproperinstallationpractices.

IMPORTANT NOTICES

...FortheinstallerandoperatoroftheMasterTemp®125poolandspaheater.Themanufacturer’swarrantymaybevoidif,foranyreason,theheaterisimproperlyinstalledand/oroperated.Besuretofollowtheinstructionssetforthinthismanual.Ifyouneedanymoreinformation,orifyouhaveanyquestionsregardingtothispoolheater,pleasecontactPentairAquaticSystemsat(800)831-7133.

WARRANTY INFORMATION

TheMasterTemp®125poolheaterissoldwithalimitedfactorywarranty. Specificdetailsaredescribedonthewar-rantyregistrationcardwhichisincludedwiththeproduct.Returnthewarrantyregistrationcardafterfillingintheserialnumberfromtheratingplateinsidetheheater.

PentairAquaticSystemshighstandardsofexcellenceincludeapolicyofcontinuousproductimprovementresultinginyourstate-of-the-artheater.Wereservetherighttomakeimprovementswhichchangethespecificationsoftheheaterwithoutincurringanobligationtoupdatethecurrentheaterequipment.

Theseheatersaredesignedfortheheatingofchlorine,bromineorsaltsystemswimmingpoolsandspasorinnon-stationaryinstallations,andshouldneverbeemployedforuseasspaceheatingboilersorgeneralpurposewaterheaters.Themanufacturer’swarrantymaybevoidif,foranyreason,theheaterisimproperlyinstalledand/oroperated.Besuretofollowtheinstructionssetforthinthismanual.

CAUTIONOPERATING THIS HEATER CONTINUOUSLY AT WATER TEMPERATURE BELOW 68° F. WILL CAUSE HARMFUL CONDENSATION AND WILL DAMAGE THE HEATER AND VOID THE WARRANTY. Do not use the heater to protect pools or spas from freezing if the final maintenance temperature desired is below 68° F., as this will cause condensation related problems.

Section 2: Warning and Safety Instructions

Section 2. Warning and Safety Instructions

IMPORTANT SAFETY INSTRUCTIONSREAD AND FOLLOW ALL INSTRUCTIONS

SAVE THESE INSTRUCTIONS

MasterTemp® 125 High Performance Heater


6

CONSUMER INFORMATION AND SAFETY

WARNINGThe U.S. Consumer Product Safety Commission warns that elevated water temperature can be hazardous. See below for water temperature guidelines before setting temperature.

1. Spaorhottubwatertemperaturesshouldneverexceed104°F(40°C).Atemperatureof100°F(38°C)isconsideredsafeforahealthyadult.Specialcautionissuggestedforyoungchildren.

2. Drinkingofalcoholicbeveragesbeforeorduringspaorhot tubusecancausedrowsinesswhichcould lead tounconsciousnessandsubsequentlyresultindrowning.

3. Pregnantwomenbeware! Soakinginwaterabove102°F(39°C)cancausefetaldamageduringthefirstthreemonthsofpregnancy(resultinginthebirthofabrain-damagedordeformedchild).Pregnantwomenshouldsticktothe100°F(38°C)maximumrule.

4. Beforeenteringthespaorhottub,theusershouldcheckthewatertemperaturewithanaccuratethermometer.Spaorhottubthermostatsmayerrinregulatingwatertemperaturesbyasmuchas4°F(2.2°C).

5. Personswithamedicalhistoryofheartdisease,circulatoryproblems,diabetesorbloodpressureproblemsshouldobtaintheirphysician’sadvicebeforeusingspasorhottubs.

6. Personstakingmedicationwhichinducedrowsiness,suchastranquilizers,antihistaminesoranticoagulantsshouldnotusespasorhottubs.

WARNINGShould overheating occur or the gas supply fail to shut off, turn off the manual gas control valve to the heater. Do not use this heater if any part has been under water. Immediately call a qualified service technician to inspect the heater and to replace any part of control system and gas control which has been under water.

CODE REQUIREMENTS

Installationmustbeinaccordancewithalllocalcodesand/orthelatesteditionoftheNationalFuelGasCode,ANSIZ223.1andthelatesteditionoftheNationalElectricalCode,NFPA70(US).

InstallationinCanadamustbeinaccordancewiththelatestCAN/CGA-B149.1or.2andCSAC22.1CanadianElectricCode,part1.

Theheater,wheninstalled,mustbeelectricallygroundedandbondedinaccordancewithlocalcodes,or,inabsenceoflocalcodes,withtheNationalElectricalCode,ANSI/NFPA70(US)orinCanadainaccordancewiththeCanadianElectricCode,part1.asapplicable.


DANGERCARBON MONOXIDE GAS IS DEADLY – Exhaust from this pool heater contains toxic levels of carbon monoxide, a dangerous, poisonous gas you cannot see or smell.


7

The MasterTemp® 125 Heater is designed and manufactured to provide many years of safe and reliable service when installed, operated and maintained according to the information in this manual. Throughout this manual, safety warnings and cautions are identified by the “ “ symbol. Be sure to read and comply with all of the warnings and cautions.

WARNING — This heater is equipped with an unconventional gas control valve that is factory set with a manifold pressure of -.2 inches wc. Improper installation, adjustment, alteration, service or maintenance can cause property damage, personal injury or loss of life. Installation or service must be performed by a qualified installer, service agency or the gas supplier. If this control is replaced, it must be replaced with an identical control.

Do not attempt to adjust the gas flow by adjusting the regulator setting.

SAFETY INFORMATION


CARBON MONOXIDE GAS IS DEADLY READ OWNERS MANUAL COMPLETELY BEFORE OPERATING

THIS PRODUCT MUST BE INSTALLED AND SERVICED BY A PROFESSIONAL SERVICE TECHNICIAN, QUALIFIED IN POOL HEATER INSTALLATION. Some jurisdictions require that installers be licensed. Check with your local building authority about contractor licensing requirements. Improper installation and/or operation could create carbon monoxide gas and flue gases which could cause serious injury or death. Improper installation and/or operation will void the warranty.

Exhaust from this pool heater contains toxic levels of carbon monoxide, a dangerous, poisonous gas you cannot see or smell. Symptoms of carbon monoxide exposure or poisoning include dizziness, headache, nausea, weakness, sleepiness, muscular twitching, vomiting and inability to think clearly. IF YOU EXPERIENCE ANY OF THE ABOVE SYMPTOMS, IMMEDIATELY TURN OFF THE POOL HEATER, LEAVE THE VICINITY OF THE POOL OR SPA AND GET INTO FRESH AIR IMMEDIATELY. THE POOL HEATER MUST BE THOROUGHLY TESTED BY A GAS PROFESSIONAL BEFORE RESUMING OPERATION.

EXCESSIVE CARBON MONOXIDE EXPOSURE CAN CAUSE BRAIN DAMAGE OR DEATH.

• NEVER use this pool heater indoors without specified ventilation system (and properly installed vent pipe).

• NEVER use this pool heater in the home or in partly enclosed areas (such as garages), unless the specified ventilation system is used. If used outdoors, install far from open windows, doors, vents and other openings.

• Pentair strongly recommends that all vents, pipes and exhaust systems be initially and periodically tested for proper operation. This testing can be accomplished by using a hand-held carbon monoxide meter and/or by consulting with a gas professional.

• Pool heaters must be used in conjunction with carbon monoxide detectors installed near the pool heater. The carbon monoxide detectors must be periodically inspected for proper operation so

DANGER —

WARNING — FOR YOUR SAFETY

This product must be installed and serviced by a professional service technician, qualified in pool heater installation. Some jurisdictions require that installers be licensed. Check with your local building authority about contractor licensing requirements. Improper installation and/or operation could create carbon monoxide gas and flue gases which could cause serious injury or death. Improper installation and/or operation will void the warranty.


8 Section 2. Warning and Safety Instructions

SAFETY INFORMATION, (cont’d.)

WARNING — Risk of fire or explosion from incorrect fuel use or faulty fuel conversion. Do not try to run a heater set up for natural gas on propane gas or vice versa. Only qualified service technicians should attempt to convert heater from one fuel to the other. Do not attempt to alter the rated input or type of gas by changing the orifice. If it is necessary to convert to a different type of gas, consult your Pentair dealer. Serious malfunction of the burner can occur which may result in loss of life. Any additions, changes, or conversions required in order for the appliance to satisfactorily meet the application needs must be made by a Pentair dealer or other qualified agency using factory specified and approved parts. The heater is available for use with natural gas or LP (propane) gas only. It is not designed to operate with any other fuels. Refer to the nameplate for the type of gas the heater is equipped to use.

• Use heater only with the fuel for which it is designed.

• If a fuel conversion is necessary, refer this work to a qualified service technician or gas supplier before putting the heater into operation.

WARNING — Risk of fire or explosion from flammable vapors. Do not store gasoline, cleaning fluids, varnishes, paints, or other volatile flammable liquids near heater or in the same room with heater.

WARNING — Risk of explosion if unit is installed near propane gas storage. Propane (LP) gas is heavier than air. Consult local codes and fire protection authorities about specific installation requirements and restrictions. Locate the heater away from propane gas storage and filling equipment as specified by the Standard for the Storage and Handling of Liquefied Petroleum Gases, CAN/CSA B149.2 (latest edition) or ANSI/NFPA 58 (latest edition).

WARNING — Risk of fire, carbon monoxide poisoning, or asphyxiation if exhaust venting system leaks. Only qualified service technicians should attempt to service the heater, as leakage of exhaust products or flammable gas may result from incorrect servicing.

WARNING — Risk of asphyxiation if exhaust is not correctly vented. Follow venting instructions exactly when installing heater. Do not use a drafthood with this heater, as the exhaust is under pressure from the burner blower and a draft hood will allow exhaust fumes to blow into the room housing the heater. The heater is supplied with an integral venting system for outdoor installation. A vent conversion kit (See Page 23 for Part Numbers for Conversion Kits) is available for installations in enclosures Canada) or indoors (U.S.). Use the specified venting, and only the specified venting, when heater is installed in an enclosure or indoors. In Canada, this pool heater can only be installed outdoors or in an enclosure that is not normally occupied and has no openings directly into occupied areas. See Page 18 for enclosure venting requirements.

CAUTION — Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation. Wiring errors can also destroy the control board.

• Connect heater to 120 or 240 Volt, 60 Hz., Single Phase power only. • Verify proper operation after servicing. • Do not allow children to play on or around heater or associated equipment. • Never allow children to use the pool or spa without adult supervision. • Read and follow other safety information contained in this manual prior to operating this pool

heater.


9

GENERAL SPECIFICATIONS

NOTICE:

• Combustion air contaminated by corrosive chemical fumes can damage the heater and will void the warranty.

• The Combination Gas Control Valve on this heater differs from most appliance gas controls. If it must be replaced, for safety reasons replace it only with an identical gas control.

• The access door panels must be in place to provide proper ventilation. Do not operate the heater for more than five (5) minutes with the access door panels removed.

• This heater is design certified by CSA International as complying with the Standard for Gas Fired Pool Heaters, ANSI Z21.56/CSA 4.7, and is intended for use in heating fresh water swimming pools or spas.

• The heater is designed for the heating of chlorine, bromine or salt system swimming pools and spas. It should NOT be used as a space heating boiler, or general purpose water heater.

• The heater is design certified by CSA International for installation on combustible flooring. Specified minimum clearances must be maintained to combustible surfaces (see “Heater Clearances”, page 18).

• The heater should be located in an area where leakage of the heater or connections will not result in damage to the area adjacent to the heater or to the structure. When such locations cannot be avoided, it is recommended that a suitable drain pan, adequately drained, be installed under the heater. The pan must not restrict air flow.

CONSUMER INFORMATION AND SAFETY

WARNINGThe U.S. Consumer Product Safety Commission warns that carbon monoxide is an “invisible killer”. Carbon monoxide is a colorless and odorless gas.

1. Carbonmonoxideisproducedbyburningfuel,includingnaturalgasandpropane.

2. Properinstallation,operationandmaintenanceoffuel-burningappliancesinthehomeisthemostimportantfactorinreducingcarbonmonoxidepoisoning.

3. Besurethatfuelburningappliancessuchasheatersareinstalledbyprofessionalsaccordingtomanufacturer’sinstructionsandcodes.

4. Alwaysfollowthemanufacturer’sdirectionsforsafeoperation.

5. Havetheheatingsystem(includingvents)inspectedandservicedannuallybyatrainedservicetechnician.

6. Examineventsregularlyforimproperconnections,visiblecracks,rustorstains.

7. Installbattery-operatedcarbonmonoxidealarms.ThealarmsshouldbecertifiedtotherequirementsofthemostrecentUL,IAS,CSAandIAPMOstandardforcarbonmonoxidealarms.Testcarbonmonoxidealarmsregularlyandreplacedeadbatteries.



10

HEATER DESCRIPTIONFigure 1 is a diagram of the heater showing how it operates.Preciselymatchedorificeplatesmeter theairandgas into themixer.Theblowerdrawstheairandgasthroughthemixerandforcesitintotheburner’sflameholder.Asealedheatexchangersurroundstheflameholder,dischargingexhaustgasesouttheflue.

TwoinchPVCwaterpipingconnectsdirectlytothemanifold/headerontheheatexchangerusing1.5”PVCslipunionsprovidedwiththeheater.Theoutermanifoldremainscool;noheatsinksarerequired.Athermalregulatorandaninternalbypassregulatethewaterflowthroughtheheatexchangertomaintainthecorrectoutlettemperature.Theheateroperatorcontrolpanelboardassemblyislocatedontopoftheheater.

SEQUENCE OF OPERATIONAnelectronictemperaturesensingthermistorinthemanifoldadapterinletcontrolstheheateroperation.Whentheinletwatertemperaturedropsbelowthetemperaturesetontheoperatingcontrol,theburnercontrollersuppliespowertothecombustionairblowerthroughaseriesofsafetyinterlocks.Theinterlocksconsistof:•thepressureswitch(PS),whichsensesthatthepumpisrunning,•thehighlimitswitch(HLS),whichopensiftheheatexchangeroutlettemperaturegoesabove135°F(57°C),and•theairflowswitch(AFS),whichsensesthepressuredropacrosstheairmeteringorifice,•theautomatic gas shut-off (AGS) switch,which opens if the heat exchanger outlet temperature goes above140°F(60°C).

•thestackfluesensor(SFS),whichshutsdowntheheaterifthefluegastemperaturereaches480°F(249°C).

Theairflowswitch(AFS)sensesthepressuredropacrosstheairmeteringorifice.Assoonasthereissufficientairflow,theAFScloses,closingthecircuittothehotsurfaceigniter(HSI),whichignitesthefuelmixture.Onacallforheat,theblowerandHSIareenergized.Inabout20seconds,thegasvalveopensandignitionoccurs.TheHSIthenswitchestoasensingmodeandmonitorstheflame.

Theheater is equippedwithadigitaloperatingcontrol thatenables theuser topre-set thedesiredpoolandspawatertemperatures.Thecontrolenablestheusertoselectbetweenpoolandspaheating,andfeaturesadigitaldisplaythatindicatesthewatertemperature.

PUTTING THE HEATER INTO SERVICEIftheheaterisinstalledbelowthelevelofthepool,ormorethantwofeetabovepoollevel,thepressureswitchsettingshouldbeadjusted.SeeWATERPRESSURESWITCH,intheSAFETYCONTROLSSection.

Beforeputtingtheheaterintoserviceforthefirsttime,followtheinstructionsunder“BEFORESTART-UP”(page32)inthefrontofthismanual.Checkforproperoperationoftheheaterbyfollowingthestepsunder“OPERATIONINSTRUCTIONS.”

Damagetoequipmentcausedbyimproperinstallationorrepairwillvoidthewarranty.

Section 3. Installation Instructions

Section 3: Installation Instructions

Gas

Air

Mixer

Blower

Inlet(Cold Water)

Exh

aust

Heating CoilsOutlet(MixedWater)

Burner

Figure 1.


11Section 3. Installation Instructions

Theseinstallationinstructionsaredesignedforusebyqualifiedpersonnelonly,trainedespeciallyforinstallationofthistypeofheatingequipmentandrelatedcomponents.Somestatesrequireinstallationandrepairbylicensedpersonnel.Ifthisappliesinyourstate,besureyourcontractorbearstheappropriatelicense.SeeFigure2forOutdoorandIndoorInstallations.

SPECIFICATIONS

DIMENSIONS IN INCHES

Figure 2.

5.5"14cm

20.85"52.95cm

21"53 cm

29.43"74.76

23"58.4cm

10.87"27.6cm

10.87"28.cm

17.5"44.5cm

ELECTRICALCONDUIT PORT

FRONT VIEW TOP VIEW

EXHAUST SIDE VIEW PLUMBING SIDE VIEW


12

PLUMBING CONNECTIONSTheMasterTemp® 125heaterhas theuniquecapabilityofdirect schedule 40PVCplumbing connections. A set ofbulkheadfittings is includedwith theMasterTemp®125heater to insure conformitywith Pentair’s recommendedPVCplumbingprocedure.Otherplumbingconnectionscanbeused.SeeFigure3forplumbingconnections.

CAUTION Before operating the heater on a new installation, turn on the circulation pump and bleed all the air from the filter using the air relief valve on top of the filter. Water should flow freely through the heater. Do not operate the heater unless water in the pool/spa is at the proper level. If a manual by-pass is installed, temporarily close it to insure that all air is purged from the heater.

WATER CONNECTIONSTheheater requires properwaterflowandpressure for itsoperation.SeeFigure4fortherecommendedinstallation.Thefilterpumpdischargestothefilter,thefilterdischargestotheheater,andtheheaterdischargesdirectlytothepoolorspa.Amanualbypassvalveshouldbeinstalledacrosstheheaterwhen the pumpflow exceeds 70GPM (265LPM ) . See“WATERFLOWRATE”Table1onpage13forsettingofthemanualby-passvalve.Makesurethattheoutletplumbingfromtheheatercontainsnoshut-offvalvesorotherflowrestrictionsthatcouldpreventflowthroughtheheater(exceptforpoolinstallationsasnotedbelow,orwinterizingvalveswhereneeded).Toswitchflowbetweenthepoolandspa,useadivertervalve.Donotuseanyvalvethatcanshutofftheflow.Installthechemicalfeederdownstreamoftheheater.Installachemicalresistantone-waycheckvalvebetweentheheaterandthechemicalfeedertopreventback-siphoningthroughtheheaterwhenthepumpisoff.NOTICE:Iftheheaterisplumbedinbackwards,itwillcyclecontinuously.Makesurepipingfromfilterisnotreversedwheninstallingheater.Connecttheheaterdirectlyto1.5”PVCpipe,usingtheintegralunionsprovided.Heatsinksarenotrequired.Thelowthermalmassoftheheaterwillpreventoverheatingofthepipingconnectedtothepumpeveniftheheatershutsdownunexpectedly.Ifyouareusingaflexiblecorrugatedhoseforabovegroundsystems,useonlyPentairapprovedflexiblehosekits:P/N155151(6ft.)andP/N155005(12ft.).Flexiblehoseconnectionthreadedadaptersareprovidedintheaccessorybag.Occasionallyatwo-speedpumpwillnotdevelopenoughpressureonthelowspeedtooperatetheheater.Inthiscase,runthepumpathighspeedonlytooperatetheheater.Ifthisdoesnotsolvetheproblem,donottrytoruntheheater.Instead,correcttheinstallation.Donotoperatetheheaterwhileanautomaticpoolcleanerisalsooperating.Ifthecirculationpumpsuctionisplugged(forexamplebyleaves),theremaynotbeadequateflowtotheheater.Donotrelyonthepressureswitchinthiscase.

Pool

MainDrain

Spa

From Pool 3-WayValve

3-WayValve

3-WayValve

Chlorinator

Heater

Pump

Check Valve

Filter

Figure 4.


PUMPFILTER

HEATER

MANUALBY-PASS

TOPOOL

GATEVALVE

FROMPOOL

FROMFILTER

Figure 3.


13

BELOW POOL INSTALLATION

Iftheheaterisbelowwaterlevel,thepressureswitchmustbead-justed.Thisadjustmentmustbedonebyaqualifiedservicetechni-cian.SeefollowingCAUTIONbeforeinstallation.

CAUTION BELOW OR ABOVE POOL INSTALLATION

The water pressure switch is set in the factory at 3.00 PSI (± 0.75 PSI). This setting is for a heater installed at pool level. If the heater is to be installed more than 1’ above or below, the water pressure switch must be adjusted by a qualified service technician. See page 34, Figure 29.

FLOW SWITCHIf the heater is installed more than 5’ above the pool or more than 4’ below the pool level, you will be beyond the limits of the pressure switch and a flow switch must be installed. Locate and install the flow switch externally on the outlet piping from the heater, as close as possible to the heater. Connect the flow switch wires in place of the water pressure switch wires.


VALVESWhenanyequipmentislocatedbelowthesurfaceofthepoolorspa,valvesshouldbeplacedinthecirculationpipingsystemtoisolatetheequipmentfromthepoolorspa.Checkvalvesarerecommendedtopreventback-siphoning.Back-siphoningismostlikelytooccurwhenthepumpstops,creatingapressure-suctiondifferential.DoNOTsanitizethepoolbyputtingchlorinetabletsorsticksintotheskimmer(s).Whenthepumpisoff,thiswillcauseahighconcentrationofchlorinetoentertheheater,whichcouldcausecorrosiondamagetotheheatexchanger.

CAUTIONExercise care when installing chemical feeders so as to not allow back siphoning of chemical into the heater, filters or pump. When chemical feeders are installed in the circulation of the piping system, make sure the feeder outlet line is down stream of the heater, and is equipped with a positive seal noncorrosive “Check Valve”, (P/N R172288), between the feeder and heater.

MANUAL BY-PASSWherethewaterflowrateexceedsthemaximum70GPM(265LPM),amanualbypassshouldbeinstalledandadjusted.Afterinstallingthevalve,adjustthevalvetobringtheflowratewithintheacceptablerange.Then remove the valve handle or lock it in place to avoidtampering.SeeFigure5.

Table 1.

See page 34 for Pressure Relief Valve Installations.

Cool water in

Warm water out

OUTLET TO POOL

INLET FROM HEATER

1. Set Manual By-Pass Valve.2. Remove Handle.

Model Min. (GPM) (LPM) Max. (GPM) (LPM) *

125 20 (76) 70 (265)

* Do not exceed the maximum recommended flowrate for the connecting piping.

Figure 5.


14

GAS CONNECTIONS

GAS LINE INSTALLATIONS

Beforeinstallingthegasline,besuretocheckwhichgastheheaterhasbeendesignedtoburn.Thisisimportantbecausedifferenttypesofgasrequiredifferentgaspipesizes.Theratingplateontheheaterwillindicatewhichgastheheaterisdesignedtoburn.Table2,shownonpage15,showwhichsizepipeisrequiredforthedistancefromthegasmetertotheheater.Thetableisfornaturalgasataspecificgravityof.65andpropaneataspecificgravityof1.55.

Whensizinggaslines,calculatethree(3)additionalfeetofstraightpipeforeveryelbowused.Wheninstallingthegasline,avoidgettingdirt,greaseorotherforeignmaterialinthepipeasthismaycausedamagetothegasvalve,whichmayresultinheaterfailure.

The gas meter should be checked to make sure that it will supply enough gas to the heater and any other appliances that may be used on the same meter. The gas line from the meter will usually be of a larger size than the gas valve supplied with the heater. Therefore a reduction of the connecting gas pipe will be necessary. Make this reduction as close to the heater as possible.

Theheaterrequiresagassupplyofnotlessthan4”(10.2cm)wcandnotmorethan14”(35.6cm)wc.Gassupplypressuresoutsideofthisrangemayresultinimproperburneroperation.Aminimumflowingordynamicinletpressure(whiletheheaterisrunning)of4”(10.2cm)wcisrequiredtomaintaininputratingwithnomorethana2”pressuredropbetweenstaticanddynamic.ThegassupplymustbeinstalledinaccordancewiththeNational Fuel Gas Code, ANSIZ223.1,orstandardCSA B149.1,Natural Gas and Propane Installation Codes,asapplicableandallapplicablelocalcodes.Installamanualshut-offvalveandasedimenttrapandunionlocatedoutsidetheheaterpanels,seeFigure6.Donotusearestrictivegascock.Thefollowingminimumgaspipesizesarerecommendedfornaturalgassupplypiping,seeTable2onpage15.ForlowpressureLPgas,pipesizemaybereducedby1/4”,withaminimumpipesizeof1/2”.Checkforcompliancewithlocalcodes.

Theheaterandanyothergasappliancesmustbedisconnectedfromthegassupplypipingsystemduringanypressuretestingonthatsystem,(greaterthan½PSI).Theheateranditsgasconnectionmustbeleaktestedbeforeplacingtheheaterinoperation.Donotuseflametotestthegasline.Usesoapywateroranothernonflammablemethod.

NOTEA manual main shut-off valve must be installed externally to the heater.

WARNINGDO NOT INSTALL THE GAS LINE UNION INSIDE THE HEATER CABINET. THIS WILL VOID YOUR WARRANTY.

SEDIMENT TRAPSInstallasedimenttrapandunionlocatedoutsidetheheater panels in accordancewith National coderequirements.Donotusearestrictivegascock.Thesedimenttrapshallbeeitherateefittingwithacappednippleinthebottomoutletwhichcanberemovedforcleaning, as shown inFigure 6, or an other devicerecognized as an effective sediment trap. All gaspipingshouldbetestedafterinstallationinaccordancewithlocalcodes.

Figure 6.


ManualShut-offValve

SedimentTrap

Union

At least 9"

At least 3"

1" Dia. or larger(See "RecommendedPipe Sizes" Chart)

18–24" of 3/4"Gas line fromValve

BellReducer


15

GAS PIPE SIZING

Table 2.

Section 3. Installation

STAGE TWO “LOW PRESSURE” GAS PIPE SIZINGPIPE SIZING FOR GAS LINE CONNECTIONS

MAXIMUM EQUIVALENT PIPE LENGTH (Ft.)Natural Gas at 1000 B.T.U. per Cubic Foot

Propane Gas at 2500 B.T.U. per Cubic Foot

MODEL

1/2” 3/4” 1” 1-1/4” 1-1/2” 2” 2-1/2”NAT PRO NAT PRO NAT PRO NAT PRO NAT PRO NAT PRO NAT PRO

125 - 20’ 50’ 80’ 125’ 250’ 450’ 600’ - - - - - -

TESTING GAS PRESSUREBeforeoperatingtheheater,theheateranditsgasconnectionsmustbeleaktested.DoNOTuseanopenflametotestforleaks.Testallgasconnectionsforleakswithsoapywateroranothernon-flammablemethod(seepage14).Theheateranditsindividualshut-offvalvemustbedisconnectedfromthegassupplypipingsystemduringanypressuretestingofthatsystemattestpressuresinexcessof1/2psig(3.5kPa).Theheatermustbeisolatedfromthegassupplysystembyclosingitsindividualmanualshut-offvalveduringanypressuretestingofthegassupplyattestpressuresequaltoorlessthan1/2psig(3.5kPa).

CHECKING THE GAS PRESSURE THROUGH THE COMBINATION GAS CONTROL VALVE

WARNING Risk of fire and explosion. Improper installation, incorrect adjustment, alteration, service, or maintenance of the Combination Gas Control Valve can lead to fire or explosion, causing loss of life, personal injury, and/or property damage. If it is necessary to adjust the gas valve, this must be done by only by a qualified service agency. These instructions are for the use of qualified service technicians only!

Thisapplianceisequippedwithanunconventionalgascontrolvalvethatisfactorysetwithamanifoldpressureof–.2”(–0.5cm)wc.Installationorservicemustbeperformedbyaqualifiedinstaller,serviceagency,orthegassupplier.Ifthiscontrolvalveisreplaced,itmustbereplacedwithanidenticalcontrol.Thecombinationgasvalveincorporatesdualshut-offvalvesandanegative-pressureregulator.Forproperoperation,theregulatedpressureattheoutletmanifoldofthevalvemustbe–0.2”(–0.5cm)wcbelowthereferencepressureattheblowermixerinlet,andthegasvalve‘VENT’tapmustbeconnectedtotheendcapairorificeasshowninFigure7.Donotattempttoadjustthegasinputby

To Air FlowSwitch

To GasValve Vent

Vent

Pressure Tap

To High Sideof DifferentialPressure Gauge

To Low Side ofDifferential Pressure Gauge

Pressure TapInlet

Figure 7.

Connection for ServiceTo Air FlowSwitch

To GasValve Vent

Connection for Test

GAS PRESSURE REQUIREMENTSCAUTIONThe use of Flexible Connectors (FLEX) is NOT recom-mended unless they are properly sized according to the supplier recommendations for the heater rating.

MASTERTEMP® 125 HEATER GAS PRESSURE: NATURAL AND PROPANE: MAXIMUM INLET: 14 INCHES W.C.


16

OUTDOOR INSTALLATIONForheaterslocatedoutdoors,usingthebuilt-instacklessventingsystem.

WARNINGRisk of explosion if a unit burning propane gas is installed in a pit or other low spot. Propane is heavier than air. Do not install the heater using propane in pits or other locations where gas might collect. Consult your local building code officials to determine installation requirements and specific installation restrictions of the heater relative to propane storage tanks and filling equipment. Installation must meet the requirements for the Standard for the Storage and Handling of Liquid Petroleum Gases, ANSI/NFPA 58 (latest edition) in the U.S., or CAN/CSA B149.2 (latest edition) in Canada. Consult local codes and fire protection authorities about specific installation restrictions.

Locatetheheateronalevelsurfaceinanopenareathatisprotectedfromdrainageorrun-off.Installtheheaterinanareawhereleavesorotherdebriswillnotcollectonoraroundtheheater.

Toavoiddamagetotheelectroniccomponentsintheheater,takecaretopreventprolongedexposuretodrivingsourcesofwater(suchaslawnsprinklers,heavyroofrunoff,hoses,etc.).Avoidoperationinpersistent,extreme,moistorsaltyenvironments.

Inextremeweather,shutdowntheheateranddisconnect thepower to ituntil theweatherhasmoderated.Inareassubjecttohurricanesorveryhighwinds,purchasetheBoltDownBracketKit,P/N460738.

HEATER CLEARANCES – OUTDOOR

IMPORTANT!• Inanoutdoorinstallationitisimportanttoensurewaterisdivertedfromoverhanging

eveswithapropergutter/drainagesystem.Theheatermustbesetonalevelfoundationfor proper drainage.

• Thisunitshallnotbeoperatedoutdoorsattemperaturesbelow-20o F.

Iftheheaterislocatedunderaroofoverhang,theremustbeatleastthree(3)feet(1m)ofclearancebetweenthebottomoftheoverhangandthetopoftheheaterexhaustvent,seeFigure8.Iftheheaterisunderaroofoverhang,thespacearoundtheheatermustbeopenonthreesides.DONOT,underanycircumstances,installtheheaterunderANYdeck.

Forminimumexhaustventclearances forallbuildingopenings, includingbutnot limited toventedeaves,doors,windows,gravityairinlet,seeFigure8,page17.

InCanada,theheatermustbeinstalledwiththetopoftheventatleast10feet(3m)below,ortoeithersideof,anyopeningintoabuilding.

Orienttheheaterforconvenientaccesstothewaterconnectionsandthegasandelectricalconnections.

Note:Checklocalbuildingcodesforinstallingtheheaterfromanyproperty linesetbackrequirements(seepage17forinstalltionillustration).

CAUTION If installing the heater next to or near an air conditioning unit or a heat pump, allow a minimum of 36 in. (91.4 cm) between the air conditioning unit and the heater.


3 ft. (1 M) or more

Figure 8.

(U.S. and Canada)

LeadAnchor

For Heater mountingbolts and clamps, purchase separatelyBolt Down Bracket Kit, Part No. 460738.


17

INDOOR VENTING — General Requirements

The heater may be installed as a Category I or Category III appliance.

Vented Appliance (Category I) – Vertical only

Anappliancethatoperateswithanonpositiveventstaticpressureandwithaventgastemperaturethatavoidsexcessivecondensateproductioninthevent,seepages20-22.Vented Appliance (Category III) – Vertical or Horizontal

Anappliancethatoperateswithapositiveventstaticpressureandwithaventgastemperaturethatavoidsexcessivecondensateproductioninthevent,seepages23-25.

Ifyouareconsideringconnectingthisheatertoapre-existingventsystem,makesurethattheventsystemmeetstheappropriateventingrequirementsasgiveninthismanualonpages18-27.Ifnot,replacetheventsystem.DONOTuseadrafthoodwiththisheater.TheMasterTemp®125heaterisarecapableofa270-degreedischargerotationandoperatewithapositiveventstaticpressureandwithaventgastemperaturelessthan400°F(204°C).ThetotallengthofthehorizontalrunmustnotexceedthelengththatislistedinTable4onpage19.


Figure 9.

VENTING GUIDELINESOUTDOOR INSTALLATION

Check local building codes

for setback re

quirements.

ForceAir Inlet

Property Line

4'

4'

4'3'

SIDE VIEW

Building

From building wall

Exhaust Grill(Vent)

6 in

From window or door

Must be at least 3 ft. above any forced air inlet located within a 10 ft. radius.

Vent Termination:

Must be located 6 in. away from the buildingwall and the following distances away from any building wall openings, included but not limited to vented eaves, doors, windows, gravity air inlet:

4 ft. below, 4 ft. horizontally


18 Section 3. Installation Instructions

(*) For service access, it is advisable to allow for sufficient clearance on at least one door panel. 15 cm

(6 in)

15 cm(6 in)

15 cm(6 in)

15 cm*(6 in)

*

Figure 10.

HEATER CLEARANCES — General RequirementsINDOOR INSTALLATION (U.S.) OR OUTDOOR SHELTER (CANADA)

Thefollowingclearancesmustbemaintainedfromcombustiblesurfaces:

TOP...............................6 in. (15 cm)

EXHAUST SIDE ...........6 in. (15 cm)

HEADER SIDE .............6 in. (15 cm)

DOOR PANELS† .........6 in. (15 cm)

Note(†)Forserviceaccessitisadvisabletoallowforsufficientclearanceonatleastonedoorpanel.TheheaterisdesigncertifiedbyCSAInternationalforinstallationoncombustibleflooring.Forinstallationoncarpeting,theheatermustbemountedonametalorwoodpanelthatextendsatleastthreeinches(10cm)beyondthebaseoftheheater.Iftheheaterisinstalledinaclosetoralcove,theentirefloorshallbecoveredbythepanel.Onanoutdoorshelterinstallation,theexhaustdischargesintoaventpipe.Orienttheheatersothattheventpipedoesnotinterferewithadjustmentoftheoperatingcontrols.Thecontrolpanellocatedonthetoppanelcanberotatedtoanyofthethreesidesoftheheaterforeasyaccess.However,thecontrolpanelmustnotbelocatedonthesidewheretheventislocated(seeFigure10).

OUTSIDE VENT COVER REMOVALTheheaterissuppliedfromthefactorywithabuilt-instacklessoutsideventforoutdoorinstallation.Removetheoutsideventcoverforoutdoorshelterinstallation.

COMBUSTION AIR SUPPLYForindoorinstallation,theheaterlocationmustprovidesufficientairsupplyforpropercombustionandventilationofthesurroundingarea.

Theminimumrequirementsfortheairsupplyspecifythattheroominwhichaheaterisinstalledshouldbeprovidedwithtwopermanentairsupplyopenings;onewithin12inches(30cm)oftheceiling,theotherwithin12inches(30cm)ofthefloorforcombustionair,inaccordancewiththe latesteditionofANSIZ223.1,or theNationalFuelGas code, theCSAB149.1,NaturalGas andPropaneInstallationCodes,asapplicable,andanylocalcodesthatmayapply.Theseopeningsshalldirectly,orthroughduct,connecttooutdoorair.

Note:Forindoorinstallationswherecombustionairmightbe insufficient, see“DirectAir IntakeDuctwith3-inchPVCPipe(IndoorInstallation)” onpage19.

Table 3.

Air Supply Requirements Guide

for MasterTemp® 125 Heater

Minimum Net Free Open Area for Each Opening*(Square Inches/Centimeters)

ModelAll Air From Inside Building All Air From Outside Building

Combustion Vent Combustion Vent

125 200 sq. in.1290 sq. cm.

200 sq. in.1290 sq. cm.

50 sq. in.323 sq. cm.

50 sq. in.323 sq. cm.

*

Area indicated is for one of two openings; one at floor level and one at the ceiling.


19

Corrosive Vapors and Possible Causes


Table 5.

Area Likely Contaminants

Chlorinated swimming pools and spas

Pool or spa cleaning chemicals. Acids, such as hydrochloric or muriatic acid.

New construction and remodeling areas

Glues and cements, construction adhesives, paints, varnishes, and paint and varnish strippers. Waxes and cleaners containing calcium or sodium chloride.

DirectAirIntakeDuctwith3-inchPVCPipe(IndoorInstallation)Forindoorheaterinstallationswherecombustionairsupplymightbeinsufficient, theMasterTemp®125®Heateriscertifiedforadirectairintakeductusing3-inchPVCpipe.Ifoutsideairisdrawnthrough3”PVCductdirectlyintotheheater,PVCpipecanbeinstalledinaccordancewiththefollowingrequirements:TheairintakeopeningMUSTbeinstalledatleast1ft.abovetherooflineornormalsnowlevelsforfreeairflow.TheCategoryIorIIIexhaustventterminationcapmusthaveatleast3ft.minimumverticalclearancefromairintakeduct(SeeFigure11below).

NOTEEach 90-degree elbow reduces the maximum horizontal PVC air intake duct run by 12 feet and each 45-degree elbow in the PVC air intake duct run reduces the maximum run by 6 feet. See the Table 5 above for the maximum lengths using 90-degree elbows.

CAUTIONChemicals should not be stored near the heater installation. Combustion air can be contaminated by corrosive chemical fumes which can void the warranty.

Combustion 3 in. PVC Pipe Inlet Air Intake Duct Requirements*

Combustion Air Intake 3 in. Pipe (Vertical or Horizontal)

No. of 90° Elbows Maximum Length in Feet (M)

0 70 ft. (21.3 M)1 58 ft. (17.7 M)2 46 ft. (14.0 M)3 34 ft. (10.4 M)4 22 ft. ( 6.7 M)

WARNING!DO NOT USE PVC PIPE FOR FLUE EXHAUST VENT. FLUE EXHAUST VENT TEMPERATURES CAN BE IN EXCESS OF 400° F. FLUE EXHAUST VENT MUST BE CATEGORY I or CATEGORY III METAL VENT.

Table 4.

Note (*): Combustion Air Intake Duct Connection Kit (Call 1.800.831.7133 for part number) for all MasterTemp® 125 Heater models can be purchased separately. See page 52 for parts list.

Figure 11.



CombustionChamberFlue Collar

4" x 8" Metal Flue Collar

Vent BodVV yyClean the Interior Surface

Vent Pipe

Clean and RTV This Surface

Read “VERTICAL VENTING – NEGATIVE PRESSURE” before using this table.Table 5. – Permitted Minimum and Maximum Vent Heights By Size and Heater Model

NOTE *: Vent must be at least eight (8) feet away fromnearest vertical surface. Vents extending five (5) feet or

more above the roof must be braced or guyed.Consult your local code officials for detailed information.

Metal Flue Collar Part No.

4 x 6” 77707-0076

4 x 8” 77707-0077

Vent Size Model 125Height min./max.

6 in. 6 ft. (1.8)/100 ft. (30.5)

7 in. 6 ft. (1.8)/100 ft. (30.5)

8 in. 6 ft. (1.8)/100 ft. (30.5)

9 and 10 in. 6 ft. (1.8)/50 ft. (15.3)

Type "B" Double-Wall Vent with Type "B" Double-Wall Connector in Feet (Meters)

Vent Size Model 125Height min./max.

6 in. 6 ft. (1.8)/15 ft. (4.6)

7 in. 6 ft. (1.8)/8 ft. (2.4)

8 in. Not Rec.

9 in. Not Rec.

10 in. Not Rec.

Type "B" Double-Wall Vent withSingle-Wall Connector in Feet (Meters)

VENT INSTALLATION – INDOOR INSTALLATION (U.S.) OR OUTDOOR SHELTER (CANADA)

(Category I)

Alwaysventtheheatertotheoutdoors,seeNote*.•VentitverticallyusingType“B”doublewallventconnectorpipe.Locatetheheatersoastominimizethelengthofhorizontalventingandthenumberofventelbowsrequired.Horizontalventrunsmustslopeup1/4”perfoot(2cm/M)fromtheheatertoallowexhaustcondensatetodrainanditisrecommendedtohaveacondensatedrainasdescribedintheventinginstallationinstructions.

VERTICAL VENTING - NEGATIVE PRESSURE

(See Figures 12, 13 and 14)Vent the heater vertically in a negative pressure (positive draft) system inaccordancewiththeNationalFuelGasCode,ANSIZ223.1/NFPA54and/orCSAB149.1,NaturalGasandPropaneInstallationCodes,andlocalcodes.Type“B”Double-wallventconnectorisrecommended;howeversingle-wallpipeisallowedbytheNationalFuelGasCodeinsomecircumstances.Consultyourlocalcodeofficialfordetailedinformation.Donotuseadrafthoodwiththisheater.Toconnectanegativepressuremetalgasventtotheheater,ordertheappropriateMetalFlueCollarfromthechartbelow:

1. SeeTable5,todetermineallowableventsizesforyourheater.NOTICE:Table7isforinstallationsinwhichthetotallateralventlength(thatis,thehorizontaldistancefromthefluecollartothemainverticalportionofthevent)islessthan1/2thetotalventheight(theverticaldistancefromthefluecollartotheventtermination)andwhichhavethreeorlesselbowsinthesystem.Forventingsystemswhichdonotmeettheseconditions,consulttheNationalFuelGasCode,ANSIZ223.1(U.S.),orthestandardsCSAB149.1andB149.2(Canada).

Figure 12.



6" MinimumClearance toCombustible

Materials

ListedTermination Cap

Storm Collar

Flashing

Firestop

VentBody

Metal FlueCollar

Class B Double WallMetal Vent Pipe

Min. 10 Ft.

Support Vertical Vent Pipe so adapter does not take weight of pipe.

Figure 14. – Typical Metal Vent Pipe Installation Canada (Vertical – Negative Pressure)

Figure 13. – Typical Metal Vent Pipe Installation - U.S. (Vertical – Negative Pressure)

NOTEThe allowable vent runs for each vent pipe diameter are different and can not be exceeded.

Each 90-degree elbow reduces the maximum horizontal vent run by 12 feet and each 45-degree elbow in the vent run reduces the maximum vent run by 6 feet. See Table 5 on page 20 for the maximum vent lengths using 90-degree and 45-degree elbows.

6" (15 cm) MinimumClearance to CombustibleMaterials

ApprovedTerminationCap

Storm Collar

Flashing

Firestop

VentBody

Metal FlueCollar

Double WallMetal Vent Pipe

Min. 10 Ft. (3.3 M)

Support VerticalVent Pipe soadapter does not take weight ofpipe. Disposeof condensateaccording to local codes.

Double WallMetal Vent Tee

CondensateDrain w/trap

Min. 2 Ft.(.7 M)

WARNING

2. Install themetal FlueCollar in theVentBody of theheater(locatedundertheoutsideventcover).FastenthemetalFlueCollartotheVentBodywithtwo#10sheetmetalscrews.UsehightemperaturesiliconeRTVtosealtheFlueCollartotheVentBody.BeforeconnectingthemetalFlueCollartotheVentBody,wetacleanclothorpapertowelwithisopropylalcohol(rubbingalcohol)andvigorouslywipethesocketoftheVentBody.Immediatelywipethecleanedsurfacesdrywithacleanclothorpapertowel.Repeatfortheexteriorofthe4”endofthemetalFlueCollar.AttachthemetalFlueCollartotheVentBodyusingtheRTVsuppliedwiththekit,followingtheventmanufacturer’sinstructions(includedwithkit).

3. AttachtheventpipetothemetalFlueCollarwithsheet-metalscrews.

Risk of fire or asphyxiation if vent is not assembled according to manufacturer’s instructions or if vent parts from different manufacturers are mixed. Vent parts from different manufacturers ARE NOT interchangeable. Mixing parts from more than one manufacturer may cause leaks or damage to vent. When assembling a vent, pick one manufacturer and be sure that all vent parts come from that manufacturer and are specified by the manufacturer for your system. Follow manufacturer’s instructions, local code requirements, National Fuel Gas Code requirements (U.S.) or standards CSA B149.1 and B149.2 (Canada) carefully during assembly and installation.



4. Installventpipesothatitcanexpandandcontractfreelyasthetemperaturechanges.Supporttheventpipeaccordingtoapplicablecodesandtheventmanufacturer’sinstructions.Pipesupportmustallowtheventpipefreemovementoutandback,fromsidetoside,orupanddownasnecessary,withoutputtingastrainontheheaterorventbody.Slopehorizontalpiperunsupfromtheheateratleast1/4”perfoot(2cmpermeter).InstallListedcondensatedrainsatlowpointswherecondensatemightcollect.PlumbcondensatedrainstoadrainthroughhardpipingorhightemperaturetubingsuchassiliconerubberorEPDMrubber–donotusevinylorotherlowtemperaturetubing.Followdrainmanufacturer’sinstallationinstructions.

5. UseListedfirestopforfloorandceilingpenetrations.UseListedthimbleforwallpenetrations.UseaListedroofflashing,roofjack,orroofthimbleforallroofpenetrations.Donotfillthespacearoundthevent(thatis,theclearairspaceinthethimbleorfirestop)withinsulation.Theroofopeningmustbelocatedsothattheventisvertical.

6. Donotruntheheaterventintoacommonventwithanyotherappliance.

WARNINGFire Hazard. Do not vent the heater directly into a masonry chimney. Installation into a masonry chimney must use a chimney liner and must meet the National Fuel Gas Code, ANSI Z223.1/NFPA 54 and/or CSA B149.1, Natural Gas and Propane Installation Codes requirements and all local code requirements.

WARNINGRisk of fire, carbon monoxide poisoning, or asphyxiation. It is recommended to use a CO Monitor and Fire Alarm in rooms that contain gas fired appliances.


23

HORIZONTAL OR VERTICAL VENTING - POSITIVE PRESSURE (See Figures 15, 16, and 17) (Category III)Vent the heater either horizontally or vertically using anoptional vent adapter of the 4-inch special gas approvedCategoryIIIventpipes.Install theventpipeinaccordancewithlocalcodesandtheprovisionsoftheNationalFuelGasCode,ANSIZ223.1(U.S.),orthestandardsCSAB149.1,NaturalGasandPropaneInstallationCodes(Canada),and theventmanufacturer’s instructions.Donotuseadrafthoodwith thisheater. Install theventaccording to theventmanufacturer’sdetailed instructions. Note:Maintainclearancebetween theventpipeandcombustiblesurfacesaccordingtotheventmanufacturer’sinstructionsandcoderequirements.Donotplaceanyinsulatingmaterialsaroundtheventorinsidetherequiredclearairspacesurroundingthevent.SeeTable6formaximumpermissibleventlengths.

NOTEThe allowable vent runs for each vent pipe diameter are different and can not be exceeded. Each 90° elbow reduces the maximum horizontal vent run by 12 feet and each 45-degree elbow in the vent run reduces the maximum vent run by 6 ft. See the Table 6 below for the maximum vent lengths using 90° elbows.

1. Orderanoptionalapplianceadapterkit,(Pentairoffersoptionalapplianceadapterkits,callCustomerServiceat(800)831-7133formoreinformation):PartNo.77707-0086forSaf-TVent®orSaf-TVent®CI.PartNo.77707-0087forZ-Vent.

2. Removetheoutsideventcover.3. InstalltheApplianceAdapterintheVentBodyoftheheater(locatedundertheoutsideVentCover).Before

connectingtheApplianceAdaptertotheVentBody,wetacleanclothorpapertowelwithisopropylalcohol(rubbingalcohol)andvigorouslywipethesocketoftheVentBody.Immediatelywipethecleanedsurfacesdrywithacleanclothorpapertowel.RepeatfortheexterioroftheheaterendoftheApplianceAdapter.Attachtheapplianceadaptertotheventbodyusingtheadhesivespecifiedbytheventmanufacturer,followingtheventmanufacturer’sinstructions.


CAUTION Do NOT combine exhaust vent pipes to a common exhaust vent in multiple unit installations. Run separate vent pipes.

CONNECTING SPECIAL METALIC GAS VENT TO THE HEATER

TheMasterTemp®125heaterisa“CategoryIII”appliance(whichrequiresafour(4)inchspecialgasapproved“CategoryIII”ventpipe)andisaforced-draftpoolandspaheaterwhichusespositivepressuretopushfluegasesthroughtheventpipetotheoutside.Fluegasesunderpositivepressuremayescapeintothedwellingwithanycracksorloosejointsintheventpipe,orimproperventinstallation.Theventpipemustbeofasealed-seamconstruction,suchasthoselistedforusewith“CategoryIIIAppliances”,andforoperatingtemperatureslessthan400°F(204°C).VentpipeconstructionwillbeofUL1738approvednon-corrosivematerial,suchasstainlesssteel,aluminum,galvanized.Acondensatetrapmaybeneeded.Theuseof“Approved”thimbles,roofjacksand/orsideventterminalsarerequired;andtheproperclearancestocombustiblematerialsmustbemaintainedinaccordancewithtypeofventpipeemployed—intheabsenceofaclearancerecommendationbytheventpipemanufacturer,therequirementsoftheUniformMechanicalCodeshouldbemet.TheventilationairrequirementsfortheMasterTemp®125heaterareshownonpage18.Itisrecommendedthatventrunsover18feetmayneedtobeinsulatedtoreducecondensationrelatedproblemsand/ortheuseofacondensatetrapintheventrunclosetotheheatermaybenecessaryincertaininstallationssuchascoldclimates.Horizontalvents3’(1M)orlessinlengthdonotrequireacondensatetee.TheMasterTemp®125heaterissuitableforthrough-the-wallventing.

*Minimum vent length is one foot (.34M), or in accordance with vent manufacturer’s instruction, and local and national codes. Horizontal vents 3’(1M) or less in length do not require a condensate tee, but must slope down toward the outlet at 1/4” to the foot (2cm/M) to allow condensate to drain.

4 in. Special Gas Vent (Vertical or Horizontal)

No. of 90° Elbows Maximum Length in Feet (M)0 70 ft. (21.3 M)1 58 ft. (17.7 M)2 46 ft. (14.0 M)3 34 ft. (10.4 M)4 22 ft. ( 6.7 M)

Table 6.


24

Outlet AirOpening

Inlet AirOpening

Chimney or Gas VentVent Cap and Riser Furnishedby Installer

SideWall Vent

Heater

Chimney or Gas VentVent Cap and Riser Furnishedby Installer

SideWall Vent

Outlet Air Opening

Inlet Air Opening

Figure 16.

Figure 15.

WARNINGRisk of carbon monoxide poisoning if adapter is improperly attached. Mechanical connections (such as screws) can cause cracking and leaks in the adapter. Do NOT drill holes or use screws to connect the appliance adapter to the heater vent body. Attach with manufacturer’s specified adhesive.

WARNINGRisk of fire or asphyxiation if vent is not assembled according to manufacturer’s instructions or if vent parts from different manufacturers are mixed. Vent parts from different manufacturers ARE NOT interchangeable. Mixing parts from more than one manufacturer may cause leaks or damage to vent. When installing a vent, pick one manufacturer and be sure that all vent parts come from that manufacturer and are specified by the manufacturer for your system. Follow manufacturer’s instructions and local and National Fuel Gas Code (U.S.) or CSA B149.1, Natural Gas and Propane Installation Codes (Canada) requirements carefully during assembly and installation.

4. Installventpipesothatitcanexpandandcontractfreelyasthetemperaturechanges.Supporttheventpipeaccordingto applicable codes andventmanufacturer’s instructions.Pipesupportmustallowtheventpipefreemovementoutandback,fromsidetoside,orupanddownasnecessary,without putting a strain on the heater or vent body. It isrecommendedtoslopethehorizontalpiperunsupfromtheheater at least1/4”per foot (2cm/M). Install “Approved”condensate drains at lowpointswhere condensatemightcollect.Plumbcondensatedrains to a drain throughhardpipingorhigh-temperaturetubingsuchassiliconerubberorEPDMrubber–donotusevinylorotherlowtemperaturetubing.Followdrainmanufacturer’sinstallationinstructions.

5. Usean“Approved”firestopforfloorandceilingpenetrations.Usean“Approved”thimbleforwallpenetrations.Usean“Approved” roofflashing, roof jack, or roof thimble forallroofpenetrations.Donotfillthespacearoundthevent(thatis,theclearairspaceinthethimbleorfirestop)withinsulation.Theroofopeningmustbelocatedsothattheventisvertical.

6. VentTermination–Vertical(SeeFigures15and16),forheightofventterminationabovetheroof.Usean“Approved”vent terminal specified by local and national codes andyourmanufacturer’sinstructions.Aroofterminationmustbe vertical. InCanada, theVentCap location shall haveaminimumclearanceof 4 feet (1.2M)horizontally fromelectricmeters,gasmeters,regulators,andreliefopenings.

7. Makesureentireinstallationissealedaccordingtoapprovedstandard.



25

1' Min.

4' Min.4' Min.

4' Min.

4' Min.

3' Minimum clearance ifhorizontal distance toexhaust opening is lessthan 10 feet.

Forced AirInlet

VentTermination

1' Minimumabove snow orfinished grade(whichever ishigher)

At least 7' above grade adjacent to publicwalkways

VentTermination Vent

Termination

Gas Meter

Max. 12"Min. 3"

Figure 17.8. VentTermination–HorizontalTheterminalmustbelocated(U.S.–SeeFigure17):

• atleast3”andatmost12”outfromthewall(seeFigure18),followingtheventmanufacturer’sinstructions• atleast12”abovefinishedgradeorthenormallyexpectedsnowaccumulationlevel,whicheverishigher• atleast4feetbeloworhorizontallyfrom,or1footabove,anydoorsorwindowsorgravityairinlettoabuilding• atleast3feetaboveanyforcedairinletlocatedwithin10feet• atleast4feethorizontallyfromelectricmeters,gasmeters,regulatorsandreliefequipment• atleast7feetabovegradeadjacenttowalkwaysorsimilartrafficareas

Theterminalmustbelocated(Canada–SeeFigure17):

• atleast10feet(3.3M)fromanyopeningintoabuilding• atleast12”(.3M)abovefinishedgradeorthenormallyexpectedsnowaccumulationlevel,whicheverishigher• atleast4feet(1.2M)horizontallyfromelectricmeters,gasmeters,regulatorsandreliefequipment• atleast7feet(2.1M)abovegradeadjacenttowalkwaysorsimilartrafficareas

Allow at least three feet (1M) vertical clearanceover vent terminationwhen terminating under anoverhang.

Avoidcornersoralcoveswheresnoworwindcouldhave an effect.Exhaustmay affect shrubbery andsomebuildingmaterials.Keepshrubberyawayfromtermination.To prevent staining or deterioration,sealing or shielding exposed surfaces may berequired.

WARNINGFire Hazard. Do not run the heater vent into a common vent with any other appliance. Do not run the Special Gas Vent into, through, or within any active vent such

3" (7.6 cm) Min.,12" (30.5 cm) Max.Clearance

Condensatedrain w/Trap

Condensate Tee

Support weightof pipe

ListedTerminal

Metal Special Gas VentrequiresApplianceAdapter

MetalVentBody

Slope at least 1/4" per foot(2 cm per Meter) down towards condensate drain(Optional)

Figure 18.



26

InCanada,thispoolheatercanonlybeinstalledoutdoorsorinanenclosurethatisnotnormallyoccupiedandhasnodirectopeningsintooccupiedareas.

WARNINGRisk of asphyxiation if exhaust is not correctly vented. Follow venting instructions exactly when installing heater. Do not use a draft hood with this heater, as the exhaust is under pressure from the burner blower and a draft hood will allow exhaust fumes to blow into the room housing the heater. Exhaust venting to the outdoors is required for all outdoor shelter installations.

WARNINGRisk of explosion if a unit burning propane gas is installed in a pit or other low spot. Propane is heavier than air. Do not install the heater using propane in pits or other locations where gas might collect. Consult your local building code officials to determine installation requirements and specific installation restrictions of the heater relative to propane storage tanks and filling equipment. Installation must meet the requirements for the Standard for the Storage and Handling of Liquefied Petroleum Gases, CAN/CSA B149.2 (latest edition) or ANSI/NFPA 58 (latest edition). Consult local codes and fire protection authorities about specific installation restrictions.

TheheaterisdesigncertifiedbyCSAInternationalforinstallationoncombustibleflooring;inalcoves;basements;inclosetorutilityrooms(intheU.S.).

GARAGE OR UTILITY ROOM INSTALLATION

InCanada,theheatermustbeinstalledinaroomthatisnotnormallyoccupiedandhasnoopeningsdirectlytooccupiedareas.

WARNINGRisk of fire and explosion if installed at floor level in an automotive garage or near gasoline or flammable liquid storage. Gasoline fumes are heavier than air and will settle to floor level in closed spaces. Gasoline fumes and spilled gasoline or other volatile liquids (such as some paints and varnishes) will travel across the floor and can be ignited by a gas appliance.

Inanyutilityroomorresidentialgarageinstallation,installtheheaterwiththebaseatleast18inches(.5M)abovethefloor,seeFigure19.Inagarage,installarailorwalltoprotecttheheaterfromphysicaldamagebyamovingvehicle.

Provideanadequateventilationairsupply(SeeTable3,page18).Choosealocationthatwillavoidcontaminationbychemicalfumes.

CAUTIONA Propane (LPG) fired heater must not be installed in a garage in Massachusetts, by order of the Massachusetts State Fire Marshal. For more information, call the Massachusetts State Fire Marshal’s office.

NOTICE:Combustionaircontaminatedbycorrosivechemicalfumescandamagetheheaterandwillvoidthewarranty(SeeTable5,page19).


OUTDOOR SHELTER INSTALLATION

Leave 6 in. (15 cm)of clear space between heater and combustiblesurface.

Leave 3 ft. (1 m)or more of clearanceabove heater

RAISE AT LEAST 18 in. (46 cm) above floorto avoid flammable vapors

18 in.

Figure 19.



CONTROL PANEL INDEXINGOnanoutdoorshelterinstallation,theexhaustdischargesintoaventpipe.Orienttheheatersothattheventpipedoesnotinterferewithadjustmentoftheoperatingcontrols.Thecontrolpanellocatedonthetoppanelcanberotatedtoanyofthethreesidesoftheheaterforeasyaccess,seeFigure20.

1. Removetheboltsfromthedoorpanels.Removebothdooraccesspanels.2. Removethefourcornerwingnutsthatsecurethetoppanel.Liftthetoppanelupwardtoremovethetoppanel.3. Rotatethetoppaneltothedesiredpositionlocatedat90°angles.NotethatthecontrolpanelmustNOTbelocated

onthesidewheretheventislocated.4. Replacethetoppaneldownontothesidepanels.Besurethattherearenowirescaughtunderthepanel.5. Securethetoppanelusingthefourcornerwingnuts.6. Reattachthedooraccesspanels.

FINAL INSTALLATION CHECKCheckthathorizontalventpiperunsslopeuniformlyatleast1/4”perfoot(2cmpermeter)tocondensatedrain(s).Nosags,nodips,nohighorlowspots.

Checkthatventissupportedatelbows,tees,andhorizontalandverticalrunsaccordingtomanufacturer’sinstructionsandcoderequirements.

Checkthatventsupportsandwallandceilingpenetrationsallowfreemovementsup,down,andsidewayswithoutputtinganystrainsontheheaterorventbody.

Checkforatleastsixinch(15cm)freeairclearancebetweentheheaterventpipeandcombustiblematerials.

Checkthatalljointsarecompletelytogetherandsealed.

InFlorida,buildingcodesrequirethattheheaterbeanchoredtotheequipmentpadorplatformtowithstandhighwindpressurescreatedduringhurricanes.ABoltDownBracketKit,P/N460738,isavailablewithanchorclampsdesignedtoholdtheunittotheequipmentpadinhighwindconditions.InstallationoftheanchorclampsarerecommendedinallinstallationsandarerequiredinFlorida,(SeeFloridaBuildingCode301.13).

LeadAnchor

For Heater mountingbolts and clamps, purchase separatelyBolt Down Bracket Kit, Part No. 460738.

Figure 20.

Door Acess Panel

Top Panel

Door Acess Panel


28

ELECTRICAL CONNECTIONS

ElectricalRating:60Hz120/240VoltsAC,singlephaseEnclosetheincomingACpowerlinetotheheater,inanapprovedflexibleconduitconnecteddirectlytothejunctionboxontheinsideoftheaccessdoorpanel.Linevoltagefieldwiringshouldbe14gauge,withacircuitcapacityof15Amps.

CAUTIONThis heater is designed to operate at 120 or 240 VAC. It is not recommended to be connected to OR operate on a 208 VAC.

NOTE• Before making any electrical connections to the power supply, remove the access door panels,

open the control box and plug in the correct plug (120 volt or 240 volt).

CAUTIONThe heater ships from the Factory with the 240V plug installed. Installing the 120V plug and then connecting the heater to 240V line current will immediately destroy the transformer, control board and ignition control module, and will void warranty. If you install the 240V plug and connect the heater to 120 volts line current, the heater will not operate.

• If any of the original wiring supplied with this heater must be replaced, installer must supply (No. 18 AWG, 600V, 105° C. U.L. approved AWM low energy stranded) copper wire or it’s equivalent.

Pleasereadtheboxesheaded“IMPORTANT!READMEFIRST!”onpages37and45beforeproceeding.

1. Allwiringmustbeinaccordancewithallapplicablecodes.2. Theheater,wheninstalled,mustbeelectricallygroundedandbondedinaccordancewithlocalcodesor,intheabsence

oflocalcodes,withtheNationalElectricalCodeortheCanadianElectricalCode(asapplicable).Abondinglugisprovidedontheoutsideofthepanelundertheventforthispurpose.

3. ElectricalpowercircuitstothepoolheatermustfollowlocalcodesandNationalElectricalCodeorCanadianElectricalCode(asapplicable).

4. Allwiringbetweentheheateranddevicesnotattachedtoit,orbetweenseparatedeviceswhichareinstalledinthefield,mustbe“TypeT”wireratedfor35°Crise.

5. Alllinevoltagewiringshallbeenclosedinapprovedflexibleconduit,andshallbesecurelyattachedtothefieldwiringboxlocatedinsidetheaccessdoorpanel.Theconduitorcableconnectoratthefieldwiringboxshouldcontainaninsulatingbushingoritsequivalenttopreventabrasionofthewiresastheyenterthebox.

6. Thefilterpumpshouldruncontinuouslywhentheheaterison,andforatleast15minutesaftertheheaterturnsoff.Anyswitchesinthepumpcircuit(includingcircuitbreakers)thatcandisconnectthepumpmustalsodisconnecttheheater.

7. Donotwiresingle-poleswitches,includingprotectivedevices,intoagroundedline.Theheaterisnotsensitivetopolarity.

ConnecttheL1ofthepowersupplytotheblackwire,theL2orneutralleadtotheredwire,andthegroundwiretothegreenwire.Atimeclockcontrollingthefilterpumpshouldhavealow-voltageFireman’sSwitchthatswitchesofftheheateratleast15minutesbeforeshuttingoffthepump.

Alwaysusecrimptypeconnectorswhenconnectingtwowires.


Figure 21

AC Plug120 Volt

or240 Volt



CONNECTION OF FIREMAN’S SWITCH OR REMOTE CONTACT

CAUTIONIf, while there is line voltage connected to the heater, you touch either line voltage terminal with any 24VAC wire that is connected to the control board (including the Fireman’s Switch jumper), you will immediately destroy the control board and void the warranty.

REMOTE CONTROL CONNECTIONS1. Switchoffpowertoheateratmaincircuitbreakerpanel.2. Unboltandremovetheaccessdoorpanels.3. Opencontrolboxcover(seeFigure22).4a. To connect a 2-Wire Control (suchasPentair’sIntelliTouch®orEasyTouch®) or

a timer:- RemovethefactoryinstalledjumperfromtheFireman’sSwitchterminals.- ConnectwiresbetweentheFireman’sSwitchterminalsontheheaterandthe

relay.ConnectwiresfromthecontrollerortimertotheFireman’sSwitch.Controller, timer or relay should be sized to handle 24VACat 0.5Amp(becauseitwillbecompletingthe24VACcontrolboardcircuitontheheaterasshowninFigure22).DONOTapplylinevoltagetotheFireman’sSwitchterminals.Use18gaugewirewithaminimum3/64”(1.2mm)thickinsulationratedforatemperatureriseofatleast105°C.

- Knock-outsareprovidedtoroutethewiresthroughthebottomofthecontrolboxandpastthejunctionbox.

4b.To connect a 3-Wire Control:- Connectwiresbetweenthecontrolboardterminals

ontheheaterandtheexternalrelays,asshowninFigure23.Useatleast2relaysperheater,toallowforan“OFFsetting”oneachheatermode.Selectrelaysthatcanhandlelogiclevelswitching.DONOTapplylinevoltagetocontrolboardterminals.

- Move jumper (as shownonFigure 23) to enableexternalcontrolandtodisabletheheatermembranepad’s“PoolON”and“SpaON”buttons(the“OFF”keyonthemembranepadremainsfunctional).

- Knock-outsareprovidedtoroutethewiresthroughthebottomandthetopofthecontrolboxandpastthejunctionbox.

5. Closecontrolboxcover.6. Re-installtheaccessdoorpanels.To control heaters that are operated in parallel, connectwiring at same locations on heater as 2-Wire or 3-WireControl.Itisimperativethateachcontrolcircuitisisolatedfromtheothercontrolcircuits, toavoid thatcurrentwillflowfromoneheatertoanotherthroughthecontrolcircuits.

NOTICE:ThefusefortheFireman’sSwitchisa1.25Amp1¼x¼”fastblowfuse,whichiscommonlyavailable.

GND

L1

GRO

UN

D (G

ND

)

L2

JUN

CT

ION

B

OX

L1 L2

BM

FL

F1

L1

TRAN SFIREMANS

SWITCH

Fireman's SwitchCompletes the heater24 Volt AC Control Board Circuit.DO NOT connect thiscircuit to Line Voltage!

Y Y

R

W

G

YY

TERMINAL BOARD

TRANS

TRAN

S

FUSE

FUSE

L2

Time Clock or Remote(Purchase Separately –

Supplies Power toCirculator Pump)

24VAC

24VAC

BK

O

O

BK

W

R

BK R

W

12 P

inR

ecep

tacl

e

VA

LT

HIN

DG

ND

24V

AC

24V

AC FS

TH

ER

MIS

TOR

OPERATING CONTROL

DISABLE TOGGLEENABLE TOGGLE

MEMBRANE PADCONNECTION

9

1

J6

Figure 23.

Figure 22


30

HEATER WIRING DIAGRAM(3-WIRE SYSTEM)


Plug –12 pin120V – Black240V – Red

JMP

1

JMP

1

External Control Interface Circuit Disabled, Heater Membrane Pad Enabled

External Control Interface Circuit Enabled, "Pool On" and "Spa On" Keys Disabled. "OFF" Key on Membrane Pad Remains Functional.

JMP3

CONNECTION DIAGRAMAGS Switch

Stack Flue Sensor

Gas Valve

Air Flow Switch

Extra Switch 1

Hi-Limit Switch

Pressure Switch

VA

LT

HIN

DG

ND

24V

AC

24V

AC FS

TH

ER

MIS

TOR

OPERATING CONTROL

1

PS

HLS

ES1

AFS

AGS

SFS

GAS

MEMBRANE PADCONNECTION

Spa LineCommon Line

Pool Line

IGNITION CONTROLMODULE

DIAGNOSTIC INDICATOR

F1 F2 24VAC

S1240

S1/120 L1

L1 L2

BM

FL

F1

L2 S2 TH IND VALGND

GND

GND

BLOWER

Line 2

120 VACIGNITER

TRAN S

Line 1

Ground

JUNCTION BOX

FIREMANS

SWITCH

Rep

lace

jum

per w

ithle

ads

to F

irem

an"s

Sw

itch

(fiel

d in

stal

led)

24VAC

SEC

Y/W

Y/W

Y/R

Y/O

Y/BL

O

W

W

BK

BKO

GY

GY

BK

BK

R

YBK

W

BL

YBK W

BL

GY

GY

GY

GY

BK

BK

W

RR W

G

Y

R

R

Y

YY

W

BK

Y/W

WW

RR

BL

BL

OO

O

OPR

PR

Y/R

Y/BL

Y/O

Y/W

Y

Y

YYY

YY Y Y Y

BRBR

External Control Interface

Y

NOTICE: Touching any 24VAC wire, includingthe Fireman's Switch wire, to any 120/240Vterminal while the heater is connected to line power will immediately destroy the control board and void the warranty.

BK

RGND

G

12 PositionReceptacle

1

Y/R

Y/BL

Y/O

Y/W

NA/LP Models Only

61

J6

Figure 24.



HEATER ELECTRICAL SCHEMATIC LADDER DIAGRAM

L1 L2120/240 VAC

120/240VAC

IGNITER

L1 S1 S2 L2

F1 F2 BLOWER

GND

GND

CLASS IITRANSFORMER

24 VAC

24 VAC

24V

OPERATINGCONTROL

24 VAC

LOGIC

TH

IND

AIRFLOW

SWITCH

HILIMITSWITCH

WATERPRESSURE

SWITCH

COM NO

AGSSWITCH

VAL

GAS VALVE

THERMISTORSENSOR

STACK FLUESENSOR

NOTES:

1.)

AND TH

L1 L2 F1 F2 S1 24 VAC

S2 GND IND VAL

ARE CONNECTED ON THE IGNITION MODULE.

2. )

3. )

PIN AND SOCKET CONNECTOR.

IF ANY OF THE ORIGINAL WIRES AS SUPPLIED WITH THE APPLIANCE MUST BE REPLACED, THEY MUST BE REPLACED WITH TYPE 105˚ COR ITS EQUIVALENT.

LADDER DIAGRAM

Figure 25.


32

BASIC SYSTEM OPERATION Startpump,makesurethepumpisrunningandisprimed,toclosethewaterpressureswitchandsupplypowertoheater.Besurethepooland/orspaisproperlyfilledwithwater.FollowtheLighting/Operatinginstructionsbelow.

Section 4. Operation Instructions

Operation Instructions

FOR YOUR SAFETY: READ BEFORE LIGHTING

START-UP AND OPERATIONSTART-UP AND SHUTDOWN INSTRUCTIONS ARE ON THE LABEL ATTACHED TO THE COVER OF THE APPLIANCE CONTROL BOX.

HEATERHSIELECTRONICIGNITIONLIGHTING/OPERATION

If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury or loss of life.Do not attempt to light the heater if you suspect a gas leak. Lighting the heater can result in a fire or explosion which can cause personal injury, death, and property damage.

WARNING

BEFORE START-UPA.This appliance does not have a pilot. It is equipped

withanignitiondevicewhichautomaticallylightstheburners.Donottrytolighttheburnersbyhand.

B.BEFOREOPERATING,smellallaroundtheapplianceareaforgas.Besuretosmellnexttothefloorbecausesomegasisheavierthanairandwillsettleonthefloor.

WHAT TO DO IF YOU SMELL GAS– Donottrytolightanyappliance.– Donottouchanyelectricalswitch;donotuseanyphone

inyourbuilding.– Immediatelycallyourgassupplierfromaneighbor’s

phone.Followthegassupplier’sinstructions.– If you cannot reach your gas supplier, call the Fire

Department.C.Useonlyyourhandtoturnthegascontrolonoroff.

Never use tools. If you cannot change theON/OFFsettingbyhand,don’t try torepair it,callaqualifiedservicetechnician.Forcedorattemptedrepairmayresultinafireorexplosion.

D.Donotusethisheaterifanyparthasbeenunderwater.Immediatelycallaqualifiedservicetechniciantoinspecttheheaterandtoreplaceanypartofthecontrolsystemandanygascontrolwhichhasbeenunderwater.

E.Donotoperatethepoolheaterunlessthepoolorspaisproperlyfilledwithwater.

F. Before operating the appliance for the first time orafterithasbeenoffforanextendedtime,performthefollowingchecklist:1. Removedebrisorotherarticlesfrominsidetheheater

andtheareaaroundtheheateranditsexhaustvent.Makesuretheventilationopeningsareclearofdebrisorobstruction.Forinstallationsinanenclosedspace,makesureopeningsforcombustionandventilationairareunobstructed.

2. Keepheaterareaclearandfreefromcombustibles,flammableliquidsandchemicals.

3. Checkthatallwaterconnectionsaretight.4. Watermust beflowing through the heater during

operation.Makesurethatpool/spaisfilledwithwaterandhavepumpoperating.Checkthatwaterflowisunobstructed from the appliance.Whenoperatingforthefirsttimeorafteranextendedshut-down,runfilterpumpforseveralminutestoclearallairfromthesystem.


33Section 4. Operation Instructions

OPERATING INSTRUCTIONS

1. STOP!Readthesafetyinformationon(page32).2. Setbothpoolandspathermostatstothelowestsettings.3. Turnoffallelectricpowertotheappliance.4. Thisappliancedoesnothaveapilot.Itisequippedwithanignition

devicewhichautomaticallylightstheburner.Donottrytolighttheburnerbyhand.

5. Removetheaccessdoorpanelsbyunfasteningthetwo(2)screwslocatedoneachdoor,thenliftupandoutfromthebottomofthepaneltoremove.Ifnecessary,thescrewsmaybeusedashandles,seeFigure26.

6. Toggle-StyleValve:Pulltoggletowardyoutoturngasoff,seeFigure27.

7. Waitfive(5)minutestoclearoutanygas.Ifyouthensmellgas,STOP!Follow“B”inthe“BeforeStart-up”instructions(page32).Ifyoudon’tsmellgas,gotothenextstep.

8. Pushthetoggleswitchawayfromyoutoswitchthegason.9. ReplacetheDoorAccessPanels.Allpanelsmustbeinplacewhen

operatingtheheater.10. Set3-wayvalvesoninletandoutlettopoolorspa,asappropriate.11. Turnonallelectricpowertotheappliance.12. PresseitherthePOOLONorSPAONbuttonswitchontheoperating

control.13. Setthethermostattodesiredsetting(NOTICE:Setpointmustbeabove

actualwatertemperatureorburnerwillnotfire).See“OPERATINGtheCONTROLPANEL”.

14.Theblowershouldcomeonimmediately,andafterabout20seconds,theburnershouldfire.Whenoperatingforthefirsttime,theburnermaynotfireonthefirsttrybecauseofairinthegasline.Ifitdoesnotfireatfirst,pushtheOFFswitch,waitfiveminutes,andagainpushthePOOLorSPAONswitch.Theburnershouldfireafterabout20seconds.Youmayhavetorepeatthisuntilalloftheairhasclearedthegasline.

15.Theburnershouldfireuntilthepool/spatemperaturereachesthedesiredtemperaturesetonthethermostat.Theblowerwillcontinuetorunforabout45secondsaftertheburnershutsoff.Ifanyofthesafetyinterlocksshouldopenduringburneroperation,theburnershutsoffimmediately,buttheblowercontinuestorunforabout45seconds.Shouldoverheatingoccurorthegassupplyfailtoshutoff,turnoffthemanualgascontrolvalvetotheappliance.

16. Iftheappliancewillnotoperate,followtheinstructionsbelow“TOTURNOFFGASTOTHEAPPLIANCE”,andcallyourservicetechnicianorgassupplier.

TO TURN OFF GAS TO APPLIANCE

1. PresstheOFFbuttononoperatingcontrol.2. Switchoffallelectricpowertotheunit.3. Removetheaccessdoorpanels,seeFigure26.4. Toggle-StyleValve:Pulltoggletowardyoutoturngasoff,seeFigure27.5. ReplacetheAccessDoorPanels.

Figure 27.

WaterPressureSwitch

Figure 26.

Gas control is shown OFF. Push toggle switch away from you to switch ON.


34

SAFETY CONTROLS

AIR FLOW SWITCH (AFS)Theairflowswitch,(seeFigure28),isasafetydeviceusedtoinsurethatthecombustionairblower(fan)isoperatingandhasbeendesignedtomonitorthevacuum(negative)pressurewithintheblowerhousing.Theairflowswitchisfactorysetandisconnectedupstreamoftheignitionmodule.Theignitionmoduledoesnotoperateunlesstheairpressureswitchandallsafetyswitchesareclosed.

WATER PRESSURE SWITCH

WARNINGHazardous pressure. Do not bypass the Water Pressure Switch or render it inoperable.

Thewaterpressureswitch,(seeFigure29).Ifthewaterflowisrestricted,thewaterpressureswitchmaypreventtheburnerfromfiringandcausethe“ServiceSystem”lighttogoon.Ifthelightremainsonafterthefilterhasbeenserviced,haveaqualifiedservicetechniciancheckthesystem.

Fordeck-levelheaterinstallations,theWaterPressureSwitchisfactorysetat3.00psi(20.6kPa).NOTE: See, Below Pool Level Installation instructions on page 13.Ifthepressureswitchisonefeet(.3M)beloworabovethepoolwaterlevel,resettheswitchsothatitisopenwhenthepumpisoffandclosedwhenthepumpisrunning.Turnthestar-wheelontheswitchclockwise()toraisesetting(heaterbelowthepool)andcounterclockwise()tolowerthesetting(heaterabovethepool–seeFigure30.Testtheswitchafterresetting.

NOTICE:Whentheheaterismountedmorethanfivefeet(1.5M)aboveorfourfeet(1.2M)belowthedecklevel,aPressureSwitchisnolongeradequate.AFlowSwitchmustbeinstalledinstead.

NOTICE:HeateroperationwithincorrectPressureSwitchsettingmaycauseoperationwithnowaterflow.Operationoftheheaterwithoutsufficientwaterflowmayseverelydamageit.

HIGH LIMITSA “High Limit”, is a safety device that opens theelectricalcircuitandshutsofftheheaterbasedonawatertemperature set pointwithin the “HighLimitDevice”.TheMasterTemp®125heatercontainstwo(2)highlimitdeviceswhicharelocatedonthemaininlet/outletheader.

Air Flow Switch


WaterPressureSwitch

Figure 29.

Star Wheel

A reference scale is onthe back of pressure switch

Turn star wheel clockwise to raisepressure set point if pressure switch ismore than 4 feet (1.2M) below water level

Turn star wheel counterclockwise to lowerpressure set point if pressure switch is morethan 5 feet (1.5M) above water level Figure 30.

Figure 28.

Figure 29.


35

SAFETY CONTROLS (continued)

OPERATION OF IGNITION MODULE

TheIgnitionModule,(seeFigure31),ismicroprocessorbasedandoperateson24VACsuppliedbythetransformer.Thecontrolutilizesamicroprocessortocontinuallyandsafelymonitor,analyze,andcontroltheproperoperationofthegasflameholder.Themodulewiththepresenceoftheflamesensor,usingflamerectification,allowstheheatertooperate.

OPERATING THE CONTROL PANELThefiveoperatingswitchesare:(seeFigure32)

POOL ON Pressthisbuttontogovernheateroperationbythe pooltemperaturesetting.

SPA ON Pressthisbuttontogovernheateroperationbythe spatemperaturesetting.

HEATER OFF Pressthisbuttontoswitchofftheheater.

▲ TEMP Pressthisbuttontoraisethetemperaturesetting.

▲ TEMP Pressthisbuttontolowerthetemperaturesetting.

TotogglethedisplaybetweendegreesCentigrade(°C)anddegreesFahrenheit(°F):

1. TurntheOperatingControlOFF.

2. Press▲TEMPor▲TEMPfor5seconds.Thedisplaywillflashonceandchangemodes(°Cto°Forviceversa).

3. TurntheOperatingControlON.Wheneitherthe▲TEMPor▲TEMPbuttonsaredepressed,thedigitaldisplaywillindicatethetemperaturesetting.Afterfiveseconds,thedisplaywillreturntotheactualpool/spatemperature.

Inadditiontothedigitaltemperaturedisplay,therearefiveindicatorlights:

ThePOOL ONlightindicatesthatthepoolwatertemperatureisgoverningoperationoftheheater.

TheSPA ONlightindicatesthatthespawatertemperatureisgoverningoperationoftheheater.

TheHEATINGlightcomesonandstaysonwhentheburnerisfiring.Thislightshouldbeonwhenevertheburnerison.Itblinkswhentheheateriscallingforheatbutnotfiring.Ifthislightisonbuttheburnerfailstocomeon,oneofthe“service”lightsshouldcomeon,indicatingafaultinthesystem.

TheSERVICE SYSTEMlightindicatesthatthereisinsufficientwaterflowtotheheater.Ifthepumpisoperating,thisusuallyindicatesthatthefilterand/orskimmersshouldbecleaned(somefiltersmayrequireback-washing).Ifthelightremainsonafterthefilter/skimmershavebeenserviced,thesystemshouldbecheckedbyaqualifiedservicetechnician.

TheSERVICE HEATERlightindicatesafaultintheheateroritscontrols.Ifthislightcomeson,shutdowntheheater(See“TOTURNOFFGASTOTHEAPPLIANCE”onpage33),andhaveaqualifiedservicetechniciancheckthesystem.

WARNINGRisk of explosion or fire causing burns or death if safety interlocks are disabled. DO NOT attempt to operate heater when SERVICE HEATER light is on or if blower or burner will not start. Instead, follow instructions under “To Switch Off Gas to the Appliance,” and call a qualified service technician to repair unit.

Flame CurrentCheck Point


Figure 31.

TemperatureUp and Down

Digital TemperatureDisplay

System OperationIndicator Lights

Dual TemperatureControls

Heater "OFF"Switch

Figure 32.

Diagnostic LED 1 Flash - Air Flow Fault 2 Flashes - Flame No Call for Heat 3 Flashes - Ignition Lockout


36

TEMPERATURE SETTINGTheheatercomesfactorysetat78°F.forthepoolmodeand100°F.forthespamode.Usingtheupanddownarrows,youcansetthethermostatstoaminimumtemperatureof65°F.,oramaximumof104°F.Ifyoudesiretoheatonlyonebodyofwater,thethermostatiscapableofanoffmode.Asanexample,ifyouonlywishtoheatthespaandnotthepool,simplydepressandholdthepooldownarrow,andthethermostatwillloweritssettingto65°F.thengotoanoffmode.

MAXIMUM TEMPERATURE SET POINT

1. Unboltandremovethedoorpanels(seeFigure33).

2. Accessthecontrolpanelboardontheundersideofthetopcover.Locatetheyellowbuttononthecornerofthecontrolboard.

3. PushtheMax. Temp. Set Pointbuttononthebackofthecontrolboard(seeFigure34).

Thefollowingsequenceshouldhappen:

A. TheunitwillcomeonandthePOOL ONlightwillcomeon.

B. Pressthe▲TEMPor▲TEMPpad(onTOPofthepanel)tosetmaximumpooltemperature.

C. Waitupto30seconds;thePOOL ONlightwillgooffandthe SPA ONlightwillcomeon.Tooverridethe timedelay,pushthe Max. Temp. Set Pointbuttonagain.

D. Pressthe▲TEMPor▲TEMPbuttononthecontrolpanelandsetmaximumspatemperatureto104°F (40°C)orless.

E. Waitupto30seconds;theSPA ONlightwillgooffandtheunitwillshutdown.Tooverridethetimedelay, presstheMax. Temp. Set Pointbuttonagain.

4. Reinstalltheaccessdoorpanels.


S1SETMAX

S1

SETMAX

Figure 34.Figure 33.

Door Acess Panel

Top Panel

Door Acess Panel


37 Section 5. Troubleshooting

Troubleshooting Instruction

Hazardous voltage. Can shock, burn or kill. Disconnect power before servicing any components.

Do not jumperswitch terminals to remedy a failed safety switch.

WARNING WARNING

Initial TroubleshootingOnly qualified, trained service technicians with appropriate test equipment should service the heater. Rememberthat all parts of the system affect heater operation. Before starting this troubleshooting procedure, make sure thatthe pump is running correctly, that there are no blockages in the system, that the valves are correctly set and thatthe time clock is correctly set and is running.

Go to chart “HEATER WILLNOT FIRE - A”(Page 38)

Go to chart “HEATER WILLNOT FIRE - B” (Page 39)

Go to specific safety switchtroubleshooting chart (Pages 41 and 42)

Go to chart ‘HEATER WILLNOT FIRE -C” (Page 40)

Are any red diagnos-tic LED’s on back ofboard (AGS, AFS,SFS, HLS, PS orTHERMISTOR) “on”

NO

NO

NONO

NO

YES

YES

YES

NO

YES

YES

Does red “SERVICEHEATER” LED come“on”

Verify that water temperature setting isabove water temperature reading. If it is, and heater either will not fire or no red LED’s come “on”, replace Control Board.

YES

Is green “POOL” or “SPA”LED “on”?

Is red “SERVICE SYSTEM”LED “on”?

Is red “SERVICE HEATER”LED “on”?

Turn off power to heater forabout 5 seconds, and turnback on. Make sure tempera-ture setting is above watertemperature. Wait one minute.

Do any diagnostic LED’s onback of board (AGS, AFS,SFS, HLS, PS, or THERMISTOR) come “on”and stay on?

NOTICE: Any or all of the diag-nostic LED’s may come “on”momentarily when you turn onthe power to the heater.

NOTICE: Installing the black 120 volt plug in the control box andthen connecting the heater to a 240 volt line will destroy the trans-former, control broad, and ignition control module, and will void thewarranty. If you install the red 240 volt plug and then connect theheater to a 120 volt line, the heater will not operate.READ THE FOLLOWING CAREFULLY:1. Check the line voltage to your heater. This heater will operate

on either 120 Volts AC or 240 Volts AC. 2. Remove the covers and check the 12-pin plug in the back of the

control box. The plug must match the voltage in the heater circuit.3. If the 12-pin plug is not plugged into the back of the control

box, select the correct plug from the bag in the control boxand plug it in. The BLACK plug is for 120 volts, the RED plugis for 240 volts.

IMPORTANT! READ ME FIRST!

Start here for directions to specific Troubleshooting Chart

Fire and Explosion hazard.


38 Section 5. Troubleshooting

Heater Will Not Fire - A

Start

GO TO“HEATER WILL NOT FIRE - B”Page 39

Heater should fire on demandfor heat.

Check Fireman’s Switch circuitconnections (time clock, wiring,external controller relay).

Remove jumper. Check wiringbetween Transformer and J7terminals on Control Boardand between J7 andFireman’s Switch on TerminalBoard, check fuse, andrestore continuity.

Restore power to heater.

Replace Transformer.

Heater should fire ondemand for heat.

Replace Control Board.

Replace Membrane Pad.

Check wiring connectionsbetween power supply andJunction Box and betweenJunction Box and TerminalBoard; restore continuity.

Check wiring connectionsbetween Terminal Board andTransformer primary andrestore continuity.

Is green “SPA” or“POOL” LED “on”

YES

NO

NO

YES

YES

YES

NO

NO

Depress “POOL” or “SPA” ONbutton on Membrane Pad.Does “POOL” or “SPA” LEDcome on?

Check for line voltage toheater.

Check for 24 VAC at sec-ondary of Transformer.

Check for Line Voltage atTransformer primary pins.White connects to Pin 3 onTransformer, Black to Pin 2,Orange to Pin 1.240V: check Pin1 to Pin 3.120V: check Pin 2 to Pin 3.

Jumper Fireman’s Switch atTerminal Board and depress“POOL” or “SPA” ON button onmembrane pad. Does “SPA” or“POOL” LED come “on”?

Leaving jumper in place,check for 24 VAC betweenFireman’s Switch terminalsand ground.

Jumper pins 6 and 5 on J6 ofControl Board. Does “SPA”LED come on?Jumper pins 6 and 4 on J6 ofControl Board. Does “POOL”LED come on?

Check for Line Voltagebetween L1 and L2 terminalson Terminal Board.

NOYES

NO

NO

YES

YES

YES

YES

YES

NO

NO

YES

NO

Check that correct 12-pinplug is installed (red is240V, black is 120V)

If plug is not installed:Install correct plug.240V plug in 120Vcircuit: Replace with correct plug.120V plug in 240Vcircuit: Replace trans-former, control board,and ignition controlmodule (see “HEATERWILL NOT FIRE-C and-D”, Pages 40 and 41).Check fuse and allother 24V componentsfor damage.

Remove jumper. Check ribboncable connection betweenMembrane Pad and J6 onControl Board. Depress“POOL” or “SPA” On padagain. Does “POOL” or “SPA”LED come on?

NO


39

Heater Will Not Fire - B

StartIncrease POOL/SPA tempera-ture setting on MembranePad above actual water tem-perature. Heater should fireon demand for heat. If not,and no other red LED’s light,replace Control Board.

Service pump/filter and elimi-nate other flow obstructions.

Heater should fire on call forheat. Re-verify that water flowis above minimum require-ment.

Minimum Flow Requirements

Model Flow

200 20 gal/min (76 LPM)175 20 gal/min (76 LPM)

250 25 gal/min (95 LPM)300 30 gal/min (114 LPM)400 40 gal/min (151 LPM)

If water pressure is outside ofadjustment range that willopen switch with pump offand close switch with pumpon, replace with flow switchset above minimum flowrequirement.

Model Flow

200 20 gal/min (76 LPM)175 20 gal/min (76 LPM)

250 25 gal/min (95 LPM)300 30 gal/min (114 LPM)400 40 gal/min (151 LPM)

Is red “SERVICEHEATER” LED “on”

YES

YES

NO

YES

NO

NO

Is red “SERVICE SYSTEM”LED on?

Verify that pump is on, filter isnot blocked, and the waterflow is above the minimumrequirement.

Check that water pressure iswithin the adjustment range ofthe Pressure Switch (0-5 psig)

Verify that switch wiring is OKand Pressure Switch port isnot blocked, and replacewater Pressure Switch.

Check whether any of thered diagnostic LED’s on backof board (AGS, AFS, SFS,HLS or PS) are “on”

GO TO“HEATER WILL NOT FIRE - C”

Page 40

Go to “Diagnostic LED’s”,(Pages 42 and 43)

With pump running, adjustWater Pressure Switch tolower pressure until ‘SER-VICE SYSTEM” LED goesout. Then verify that “SER-VICE SYSTEM” LED goes onwith pump off.

YES

YES

YES

NO

NO

NO

CONTINUE

Minimum Flow Requirements

Section 5. Troubleshooting


40

Heater Will Not Fire - C

Start

Go to “INITIALTROUBLESHOOTING”

Continue to observe heaterfor several minutes. Cycleheater on and off severaltimes. Observe for delayed orrough ignition, poor combus-tion, premature extinction offlame, evidence of boiling, oroperation of any diagnosticLED. Go to pertinent trou-bleshooting section if anymalfunction is observed.


Replace Gas Valve with identical part.

Fix wiring between TH andGND terminals of IgnitionControl Module and ControlBoard.


Fix wiring between GAS ter-minals on Control Board andGas Valve.

NOTE 1: Voltage appears immedi-ately after call for heat, and may beon for only about 30 seconds.

NOTE 2: Voltage appears about 24seconds after call for heat, and maybe on for only about 7 seconds.

Verify that gas supply is openall the way to Gas Valve, andGas Valve is set at “on” position.Check for 24 VAC to GasValve terminals during ignitiontry. (Voltage appears about 24seconds after call for heat).SEE NOTE 2.

Turn off power toheater for 5 seconds,and turn back on.Make sure tempera-ture setting is abovewater temperature.Wait one minute.

Does heater fire andstay on?

Did Blower come on?

Verify that gas is flow-ing to burner duringignition try. Observegas meter for move-ment during ignitiontry (wait for about 30seconds after callingfor heat).

Check for 24 VACbetween TH and GNDterminals on IgnitionControl Module. SEE NOTE 1.

Check for 24 VACbetween TH and GNDterminals on ControlBoard. SEE NOTE 1.

Check for 24 VACbetween GAS termi-nals on ControlBoard. SEE NOTE 2.

Replace ControlBoard.

NO

CONTINUE

YES

YES YES

NO

NO

YES

NO

YES

NO

NO

YES

YES

NO

YES

YES

Is “SERVICE HEATER” LED“on”?

Go to “BURNERTROUBLESHOOTING”(Page 44)

Go to “HEATER WILL NOTFIRE-D” (Page 41)

Check for 24 VAC betweenVAL and GND terminals onIgnition Control Module. SEE NOTE 2.

Check for 24 VAC betweenVAL and GND terminals onControl Board. SEE NOTE 2.

If any red diagnostic LED’s(AGS, AFS, SFS, HLS, PS, orTHERMISTOR) come “on”, goto to Pages 42 and 43.

Did burner fire at all?

Replace Ignition ControlModule.

NO

YES

Fix wiring between VAL andGND terminals of IgnitionControl Module and ControlBoard.

NO

YES

NO

NO



41

Heater Will Not Fire - D

Start

IMPORTANT! READ ME FIRST!!If your heater is correctly connected to 240 Volts AC, theIgnition Control Module (ICM) will convert the 240VAC toan intermittent pulse to the ignitor. Digital meters don’t readthis type of signal well. (An analog meter will give a betterreading than a digital meter). If the ICM is bad, your volt-

meter will read either 0 VAC or 240 VAC. If your ICM isgood, your meter will read some voltage between 0 and240 VAC. Exactly what reading you get will depend on themeter, but with a good ICM, the reading won’t be 0 VAC or240 VAC, but somewhere in between.

IMPORTANT! READ ME FIRST!

Gas flows during igni-tion try, but burnerdoes not fire.

NO

NO

YES

Go back to chart “HEATER WILLNOT FIRE-C” (Page 40).

Check voltage acrossigniter leads; OK?

Replace IgnitionControl Module. On a120 V installation,check the ignitor fordamage if it has seen240 VAC.

NO

YESReplace HSI Igniter.Check gas pressure. OK?.

Increase gas flow into heater: • Replace gas line with larger

line;• Replace regulator;• Replace meter; or• All of the above.

YES



42

Diagnostic LED's: AGS, AFS, HLS, PS, THERMISTOR

Do not jumper a safety switch toremedy a failed switch.

NOTE: ES1 is a spare and should be jumpered.CAUTION

Service pump and filter torestore proper flow. After ser-vicing, verify proper operationof Pressure Switch (PS).

Replace thermistor or ControlBoard to correct overheating.

Replace High LimitSwitch (HLS) orAutomatic GasShutoff (AGS)

If problem persists, verify proper operation of Internal Bypass Valveand Thermal Governor, and check for Heat Exchanger blockage.

YES

NO

NO

AGS or HLS "on" Verify that water flow rate isabove minimum required forheater.

Verify that inlet water temper-ature is below 104˚ F.

YES

CONTINUE

YES

CONTINUE

Verify that there is no block-age in Blower intake, HeatExchanger, and exhaust andthat exhaust is not too long(see “Indoor Vent Installation”,Page 23.

Verify correct connection ofwiring and that pressure tapsto AFS are OK.

Verify that vinyl tubing to AFSand Blower is not misrouted,kinked, disconnected, orpunctured.

Replace Air Flow Switch(AFS).

If problem persists, replaceBlower.

Replace Blower.

Verify correctconnection of wiring between24 VAC and IND terminals onIgnition Control Module andControl Board, and replaceControl Board.

YES

YES

NO

NO

NO

YES

YES

NO

AFS "on" Does Blower operate?

THERMISTOR "on" Verify Thermistor wiring. IfOK, replace Thermistor.

Disconnect Blower and checkfor line voltage between pins1 and 3 of Blower Connectoron ignition try.

Connect correctly and retry.Does Blower start?

Replace Blower. Does Blowerstart on ignition try?

Replace Ignition ControlModule.

NO

Verify that wires BMand F1 are correctlyconnected at the terminal strip (seeHeater ConnectionDiagram, Page 30).

Disconnect wires F1and F2 from IgnitionControl Module andshort them together.Does Blower comeon?

Check for 24 VAC between24 VAC and GND terminalson Ignition Control Module onignition try. Check that INDwire is correctly connected.

NO

NO

Service pump and filter torestore proper flow.

Verify that wiring isOK and pressure tapis not blocked. Re-place Pressure Switch

CONTINUE

NOPS "on" Verify that water flow rate isabove minimum required forheater.

Adjust Water Pressure Switch to close with pump running and open withpump off.

YES



43

Diagnostic LED's: SFS

NO (HD )

NO (Basic)

NO

Reset power to Heater andretry. Heater should fire.

Does the DigitalTemperature Display showError Code “E05” or “E06”?

Heater starts and runs OK,but temperature of exhaustclimbs to 450˚–500˚ in 3–5minutes.

Heater starts after severaltries, exhaust temperaturestays below 250˚.

ORHeater doesn’t start at all(exhaust stays cold).

Check pressure and volumeof fuel supply

Check the J3 and J6 connectors for corrosion/looseness on the malepins.

Check continuity in wiringharness between ControlBoard and Probe.Continuity OK?

Disconnect the sensor andcheck continuity across itsterminals. Resistanceshould be 3.5-4.0 mega-ohms.

= open circuit; 0 = shorted.

Does sensor check OK?

Clean/tighten pins asneeded.

Reset power to Heaterand retry. Heater shouldfire.

NOT OK

NO

NO

NO

NO

NO

SFS "on"

Replace Stack Flue Sensor

Correct Fuel Supply, resetHeater and retry. Heatershould fire correctly.

Repeat checks on fuel supply, Thermal Regulator,check for correct orifices,etc.

DONE

DONE

YES

YESYES

YESNO

NO

YES

NO

OK

YES

Replace HeaterControl Board.

Replace HeaterMembrane Pad.


Check Heat Exchanger Coil forleaks, liming, soot, or low flow.

Correct problem;Heater should fire.

Check Heat ExchangerCoil for leaks, liming, soot,or low flow.

Check ThermalRegulator: Open at120˚?

Check Thermal-Regulator:Seats correctly?

DONE

NO

DONE

Replace Heater Membrane Pad.

Replace Heater Control Board.



DONE

NO

YES

YES

DONE

NO



44

Burner Troubleshooting

SYMPTOM CAUSE REMEDYLoud, high-pitched whine Flame is too rich. Verify pressure tap between gas valve

and blower inlet.

See page 16 and verify that the gasregulator setting is –0.2" (–0.5cm) wc.

Flame is “fluttery .” Flame is too lean. See page 16 and verify that the gasExhaust may have acrid regulator setting is –0.2" (–0.5cm) wc. smell or burner may failto stay lit.

Burner pulsates or Exhaust vent is too long. Reduce length of exhaust vent and/orsurges, especially on number of elbows.ignition.

Combustion appears Flame current is not Check for wet or damaged igniter withnormal, but flame does being sensed. low resistance to ground. Replacewith

not stay lit. new igniter.

Verify burner flameholder is properlygrounded.

Ignition Control Module.

Heat Exchanger Troubleshooting

SYMPTOM CAUSE REMEDYBoiling in heat exchanger. Low water flow to heater. pump and or filter.May be accompanied by Heat exchanger plugged. Service

Service

heat exchanger. Correct water“bumping” sounds.

chemistry.

Bypass valve stuck open. Service bypass valve.

Thermal governor stuck Replace

Replace

Replace

Contact a qualified technician or serviceagency to replace the gas orifice.

Contact a qualified technician or serviceagency to replace the gas orifice.

thermal governor.closed.

Sweating. Thermal governor failed. thermal governor.



45

Maintenance Instructions

CARE AND MAINTENANCE

WARNINGRisk of fire or explosion from flammable vapors. Do not store gasoline, cleaning fluids, varnishes, paints, or other volatile flammable liquids near heater or in the same room with heater.

Thefollowingmaintenanceisrecommendedeverysixmonthsandatthestartofeveryswimmingseason:

1. Inspecttheheaterpanelsandventingsystemtomakesurethattherearenoobstructionstotheflowofventilatingairorburnerexhaust.Checkthatroomairintakesareopenandclearofobstructions.

2. Keeptheareainandaroundtheheaterclearandfreefromcombustiblematerials,gasolineandotherflammablevaporsandcorrosiveliquids.

3. Testtheoperationofthepressurereliefvalvebyliftingthevalvelever(ifinstalled).4. Testforproperoperationofthewaterpressureswitch.(See“WATERPRESSURESWITCH”(page34)fortesting

instructions).5. Onenclosedinstallationswithhigh-temperatureSpecialGasVentsystems,repeatthe“FinalInstallationCheck,”page

27.Checkforevidenceofjointleakage.Makesurethatjointshavenotslippedpartiallyorcompletelyapart.Checkpipeandfittingsforcracksorbreaks.Thecombustionairblowerispermanentlylubricated,anddoesnotrequireperiodiclubrication.Theburnerdoesnotrequiremaintenanceoradjustmentbytheuser.Callaqualifiedservicetechnicianifyoususpectthattheburnermayrequiremaintenance.

PRESSURE RELIEF VALVE (NOT FACTORY INSTALLED)

CanadiancoderequiresandsomeU.S.localcodesmayrequireinstallationofaPressureReliefValve(PRV).Purchaseseparatelyandinstall(P/N460925)a3/4”pressurereliefvalvecomplyingwith theANSI/ASMEBoiler andPressureVesselCode,havingacapacityequaltotheBtu/hrratingoftheheater.

ThereliefpressureofthevalveMUSTNOTEXCEED50PSI.Thereliefvalvemustbeinstalledvertically.Toinstallthevalve,usea3/4”x3-1/2”brassnippleatthemanifoldandonebrasselbowandnipple(supplied),asshowninFigure34.Novalveisallowedtobeplacedbetweenthemanifoldadapterandthereliefvalve.

Toavoidwaterdamageorscaldingfromoperationofthereliefvalve,installadrainpipeintheoutletofthepressurereliefvalvethatwilldirectwaterdischargingfromthevalvetoasafeplacefordisposal.Donotinstallanyreducingcouplingsorvalvesinthedrainpipe.Thedrainpipemustbeinstalledsoastoallowcompletedrainagefromthevalveanddrainline.Thereliefvalveshouldbetestedatleastonceayearbyliftingthevalvelever.

WARNINGExplosion hazard. Any heater installed with restrictive devices in the piping system downstream from the heater, (including check valves, isolation valves, flow nozzles, or therapeutic pool valving), must have a relief valve installed as described above.

Section 6. Maintenance

PressureRelief Valve(PRV)

Install brass nipple andelbow as shown for aPressure Relief Valve(PRV)

PressureRelief Valve(PRV)

Install brass nipple andelbow as shown for aPressure Relief Valve(PRV)


46

AFTER START-UPCHECKING WATER FLOW

WARNINGFire or flooding hazard. If the unit overheats and the burner fails to shut off, follow instructions under “To Turn Off Gas to the Appliance”, page 33, and call a qualified service technician to repair unit.

Afterstart-up,theoutletwaterpipeshouldfeelslightlywarmerthantheinletpipe.Ifitfeelshot,orifyouhearthewaterintheheaterboiling,theremaynotbeenoughwaterflowtotheappliance.Makesurethatthefilterisnotplugged.Ifwatertemperatureremainshighbuttheunitcontinuestooperate,turnofftheapplianceandcallyourservicetechnician.

SPRING AND FALL OPERATIONIfthepoolisonlyusedoccasionally,lowerthepoolthermostatto68°F(20°C)andleavetheheateron.Thiswillkeepthepoolandthesurroundinggroundwarmenoughsothattheheatershouldrestorethepooltoacomfortabletemperaturewithinaboutoneday.

WINTER OPERATION

CAUTION• Operatingthisheatercontinuouslyatwatertemperaturesbelow68°F. (20° C) will cause harmful condensation and will damage the heater and void the warranty.• Iftheheaterhasbeendrainedforfreezingcondition,doNOTturn“ON”untilthesystemiscirculatingwater.• Water trapped in the heat exchanger can result in freeze damage to the exchanger or headers. Freeze damage is specifically not covered by the warranty.• Whenstartingtheheaterfortheswimmingseasonwithawatertemperaturebelow50°F(10°C),theheatermaybeused to heat the water; however, make sure that the heater operates continuously until the water temperature reaches the heater’s minimum setting of 68° F (20° C). During cold weather, if there is no danger of freezing, operate the filter pump continuously even if the heater is not operating. If air temperatures are expected to drop below freezing (32° F/0° C), shut down the heater and winterize it.

Foroutdoorheatersinfreezingclimates,shuttheheaterdownanddrainitforwinterasfollows:1. Turnoffelectricalsupplytotheheaterandpump.2. Closemaingascontrolvalveandmanualgasvalve(locatedoutsidetheheater).TurnswitchonheatergasvalvetoOFF.3. DisconnecttheINLETandOUTLETunionsfromthesystemplumbing,anddraintheheatexchangerandmanifoldadaptercompletely.

Iftheheaterisbelowpoolwaterlevel,besuretocloseisolationvalvestopreventdrainingthepool(isolationvalvesarenotrequiredandshouldnotbeusedonheatersinstalledabovepoolwaterlevelexceptwhenneededforwinterizingvalves).Assistthedrainingbyblowingouttheheatexchangerthroughthepressureswitchfittingwithlowpressurecompressedair(lessthan5PSIor35kPa).

WARNINGExplosion hazard. Purging the system with compressed air can cause components to explode, with risk of severe injury or death to anyone nearby. Use only a low pressure (below 5 PSI or 35 kPa), high volume blower when air purging the heater, pump, filter, or piping.

4. RemovetheWaterPressureSwitch.Plugtheportinthemanifoldtopreventbugsanddirtfromgettingintothemanifold.5. Draintheplasticinlet/outletmanifoldthroughtheoutletpipe.Ifthepipedoesnotdrainnaturallytothepool,installadraincock

intheoutletpipetodrainthemanifold.6. Coverairinletgratewithaplasticbagtopreventbugs,leaves,etc.,fromgettingintotheheater.NOTICE:Water trapped in the heater can cause freeze damage. Allowing the heater to freeze voids the warranty.Toreturntheheatertoserviceafterwinterizing:1. ConnecttheINLETandOUTLETunionstothesystemplumbing.Checkthattheyareconnectedcorrectlyandtherearenowater

leaks.2. Beforestartingtheheater,circulatewaterthroughtheheaterforseveralminutesuntilallairnoisesstop.Seealso“BEFORE

START-UP”(page33)and“CAREANDMAINTENANCE”(page45).(See additional notes under Important Notices in Introduction.)



47

MAINTAINING POOL TEMPERATURETomaintainpooltemperature,makesurethattheheaterswitchandvalvingareresettopoolsettingsafterusingthespa.

ENERGY SAVING TIPS1. Keepthepoolorspacoveredwhennotinuse.Thiswillreduceheatingcosts,reducewaterevaporation,conserve

chemicalsandreduceloadonthefilteringsystem.

2. Reducepoolthermostatto78°F(25°C)orlower;reducespatemperatureto100°F(38°C).ThisisacceptedasbeingthemosthealthytemperatureforswimmingbytheAmericanRedCross.

3. Useatimeclocktostartthefilterpumpat6a.m.orlater.Theswimmingpoolloseslessheatafterdaybreak.

4. Forpoolsusedonlyonweekends,lowerthethermostatsettingby10°Fto15°F(5°Cto8°C)duringtheweektoreduceheatloss.Aproperlysizedheaterwillrestorenormaltemperaturewithinoneday.

5. Turntheheateroffwhenthepoolwillnotbeusedforanextendedperiod.

6. Followaregularprogramofpreventivemaintenancefortheheatereachnewswimmingseason.Checkoperationoftheheateranditscontrols.

CHEMICAL BALANCE

POOL AND SPA WATER

Yourpoolheaterwasdesignedspecificallyforyourspaorpoolandwillgiveyoumanyyearsoftrouble-freeservice,providedyoukeepyourwaterchemistryinpropercondition.

Waterchemistryshouldfollowgoodswimmingpoolwaterchemistrypractices.Whenusingachlorinator,installitdownstreamfromtheheaterandatalowerlevelthantheheateroutlet.Installacorrosionresistantpositiveseal“CheckValve”,(P/NR172288),betweentheheaterandthechlorinatortopreventconcentratedchemicalsfromback-siphoningintotheheater.Back-siphoningismostlikelytooccurwhenthepumpstops,creatingapressure-suctiondifferential.DoNOTsanitizethepoolbyputtingchlorinetabletsorsticksintotheskimmer(s).Whenthepumpisoff,thiswillcauseahighconcentrationofchlorinetoentertheheater,whichcouldcausecorrosiondamagetotheheatexchanger.

Threemajor items thatcancauseproblemswithyourpoolheaterare: improperpH,disinfectant residual,and totalalkalinity.Theseitems,ifnotkeptproperlybalanced,canshortenthelifeoftheheaterandcausepermanentdamage.

CAUTIONHeat exchanger damage resulting from chemical imbalance is not covered by the warranty.

WHAT A DISINFECTANT DOES

Twopoolguestsyoudonotwantarealgaeandbacteria.Togetridofthemandmakepoolwatersanitaryforswimming-aswellastoimprovethewater’staste,odorandclarity-somesortofdisinfectantmustbeused.

Chlorineandbromineareuniversallyapprovedbyhealthauthoritiesandareaccepteddisinfectingagentsforbacteriacontrol.

WHAT IS A DISINFECTANT RESIDUAL?

Whenyouaddchlorineorbromineto thepoolwater,aportionof thedisinfectantwillbeconsumedin theprocessofdestroyingbacteria,algaeandotheroxidizablematerials.Thedisinfectantremainingiscalledchlorineresidualorbromineresidual.Youcandeterminethedisinfectantresidualofyourpoolwaterwithareliabletestkit,availablefromyourlocalpoolsupplystore.

Youmustmaintainadisinfectantresidualleveladequateenoughtoassureacontinuouskillofbacteriaorvirusintroducedintopoolwaterbyswimmers,throughtheair,fromdust,rainorothersources.



48

CHEMICAL BALANCE (continued) Itiswisetotestpoolwaterregularly.Neverallowchlorineresidualtodropbelow0.6ppm(partspermillion).Theminimumlevelforeffectivechlorineorbromineresidualis1.4ppm.pH-ThetermpHreferstotheacid/alkalinebalanceofwaterexpressedonanumericalscalefrom0to14.AtestkitformeasuringpHbalanceofyourpoolwaterisavailablefromyourlocalpoolsupplystore;seeTable12.

MuriaticAcidhasapHofabout0.Purewateris7(neutral).WeakLyesolutionhaveapHof13-14.

RULE:7.4to7.6isadesirablepHrange.ItisessentialtomaintaincorrectpH,seeTable12.If pH becomes too high (over alkaline), it has these effects:1. Greatlylowerstheabilityofchlorinetodestroybacteriaandalgae.2. Waterbecomescloudy.3. Thereismoredangerofscaleformationontheplasterorintheheatexchangertubing.4. Filterelementsmaybecomeblocked.IfpHistoolow(overacid)thefollowingconditionsmayoccur:1. Excessiveeyeburnorskinirritation.2. Etchingoftheplaster.3. Corrosionofmetalfixturesinthefiltrationandrecirculationsystem,whichmaycreatebrown,blue,green,orsometimesalmost

blackstainsontheplaster.4. Corrosionofcoppertubesintheheater,whichmaycauseleaks.5. Ifyouhaveasandandgravelfilter,thealumusedasafilteraidmaydissolveandpassthroughthefilter.CAUTION: Do not test for pH when the chlorine residual is 3.0 ppm or higher, or bromine residual is 6.0 ppm or higher. See your local pool supply store for help in properly balancing your water chemistry.RULE:ChemicalsthatareacidlowerpH.ChemicalsthatarealkalineraisepH.

ALKALINITYHighorLow:“Totalalkalinity”isameasurementofthetotalamountofalkalinechemicalsinthewater,andcontrolpHtoagreatdegree.(ItisnotthesameaspHwhichrefersmerelytotherelativealkalinity/aciditybalance.)Yourpoolwater’stotalalkalinityshouldbe100-140ppmtopermiteasierpHcontrol.

Atotalalkalinitytestissimpletoperformwithareliabletestkit.Youwillneedtotestaboutonceaweekandmakeproperadjustmentsuntilalkalinityisintheproperrange.Then,testonlyonceeverymonthorsotobesureitisbeingmaintained.Seeyourlocalpooldealerforhelpinproperlybalancingthewaterchemistry.

WATER CHEMISTRY PARAMETERS


Table 7.*Start-up TDS includes source water TDS and any other inorganic salt added at start-up.NOTE (**): Failure to adhere to the listed water chemistry parameters may result in premature failure of the heat exchanger and will voidthewarranty.

Disinfectant levels Minimum Ideal MaximumFree Chlorine, ppm 1.0 2.0-4.0 5.0**Combined Chlorine, ppm None None 0.2Bromine, ppm 2.0 4-6 10.0Other Sanitizers Levels not established. Consult local health department before use.Chemical ValuespH 7.2 7.4-7.6 7.8**Total Alkalinity (Buffering), ppm 60 80-100 180as CaCO3Salt ppm 2000 3200 5000**Total Dissolved Solids, ppm N/A N/A 1,500 ppm > TDS at startup*Calcium Hardness, ppm, as CaCO3 150 200-400 500-1,000Heavy Metals None None NoneBiological ValuesAlgae None None NoneBacteria None None Refer to Local Code

Section 6. Maintenance/Replacement Parts


49

MasterTemp® 125 HEATER REPLACEMENT PARTS

Repair Parts are available from your Pentair dealer.If your dealer cannot supply you, call Customer Support at 1-800-831-7133.

For completeElectrical System parts breakdown(Key Nos. 1 through 4),See Page 53

For completeBurner Systemparts breakdown(Key Nos. 5 through 7),See Page 51

For completeWater Systemparts breakdown(Key Nos. 8 through 9),see Page 52

1

2

3

5

6

4

8

9

7



50

MasterTemp® 125 HEATER REPLACEMENT PARTS

23

22

8

9

1

1021 2

3

47

6

5

11

12

20

19

18

1327

17

16

15

23

24

25

26

14

Section 6. Maintenance/Replacement Parts Section 6. Maintenance/Replacement Parts


51

MASTERTEMP® 125 HEATER REPLACEMENT PARTS


REPAIR PARTS – BURNER SYSTEMModel

Key Part

No. Description Qty.

1 Combination Gas Control Valve Kit

2 3/4" Union

1

2

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

3 Gas Orifice

4 Gas Orifice O-Ring

• Gas Orifice Kit – NG (Incl. Key Nos. 3 and 4)†

• Gas Orifice Kit – Propane (Incl. Key Nos. 3 and 4)†

• NG to Propane Conversion Kit

(Incl. Key Nos. 3 and 4)†

• Propane to NG Conversion Kit

(Incl. Key Nos. 3 and 4)†

5 Air Blower Kit

Natural Gas Units

Propane Units

• Air Orifice Kit (Includes Key Nos. 6 and 7)

6 Air Orifice Kit

7 Air Orifice Grill

• Blower/Adapter Plate Gasket Kit

(Includes Key Nos. 8, 9, 10, 12)

• Flameholder Kit (Includes

Key Nos. 10, 11, 12, 13)

8 Blower/Adapter Plate Gasket

9 Blower Adapter Plate

10 Flameholder/Adapter Plate Gasket

11 Flameholder Assembly

12 Flameholder/Combustion Chamber Gasket*

13 Flameholder Insulation Cap

• Flameholder Insert

14 Combustion Chamber Gasket Kit

15 One Piece Metal Chamber/Combustion Chamber

Assembly (9-bolt)

• Insulation Kit (Includes Key No. 13, 16, 17,18,19)

16 Bottom Outer Insulation Blanket*

17 1" Bottom Inner Insulation

18 1" Top Insulation

19 Top Outer Insulation Blanket*

• Lower Enclosure Insulation

20 One Piece Metal Elbow/Combustion Chamber

Cover Assembly (9-bolt)

21 Metal Vent Cover

22 Heater Top

Side Panel {Service Panel}

24 Side Panel {Manifold}

Heater Bottom

26

25

23

Side Panel {Flue Stack}

27 J-Box Cover

28 Screws/Clips Kit, Panel (8 ea. clips & 8 ea. screws)

MT125 NA

42001-0051S

38404-4097S

474981

474980

461063

461062

474978

474977

474979

77707-0011

474994

474990

77707-0008

42001-0074S

474958

42002-0005S

42002-0034Z

474991

474992

42002-0031Z

474993

42002-0041Z

474292

* Not available separately.

Not included with heater. Order separately .

1

1

1

1

1

1

1

1

1

**

MT125 LP

474952

Combustion Air Intake Duct Connection Kit CALL1•


52


REPAIR PARTS – WATER SYSTEMModel

Key Part MT125 NAMT125 LP No. Description Qty.

1 Tube Sheet Coil Assembly Kit (NA, LP)(Includes Key No.3) 1 474971

2 Manifold Kit (Includes Key Nos. 3-11. Key No.12 and 13 not included. Key Nos. 5-7 in “Electrical System”, Page 53 1 474972

3 Coil/Tubesheet Sealing O-Ring Kit 474973

4 Manifold Bottom Plate (*)

5 Manifold O-Ring (*) 11

16 Manifold Baffle Plate (*)7 Manifold Bypass Valve (*) 1

18 Water Pressure Switch 42001-0060S9 Manifold (*) 110 5/16" Washer, Stainless Steel (*) 611 5/16x18x2-3/4" Hex Cap screw (*) 6

1 47498912 Thermal Regulator

13 Pressure Relief Valve (Recommended(Purchase Separately) 1 473715Z

1

13 4

5 2

8

11

9

--

--

---

126

107

-

(*) Not available separately

13

1 47497414 1-1/2” Union Kit

14



53



REPAIR PARTS – ELECTRICAL SYSTEM

ModelKey Part 125 (NA/LP)No. Description Qty.

1 Heater Display Cover 1 42002-0035

2 Igniter Bracket 1 42001-0030S

3 Igniter/Igniter Gasket Kit Incl. Key Nos. 3 and 4) 1 77707-0054

4 Igniter Gasket 1 42001-0066S

5 Automatic Gas Shutoff Switch (AGS) 1 474368S

6 High Limit Switch 1 474367S

7 Thermistor 1 42001-0053S

8 Terminal Board 1

1

1

1

1

1

42001-0056S

9 Fireman’s Switch Fuse (1.25A, 1-1/4") 32850-0099

10 Ignition Control Module 1 42001-0052S

11 Transformer, 120/240V 1 42001-0107S

12 Air Flow Switch 42001-0061S

13 Control Board Kit (NA, LP Series) 1 42002-0007S

• Heater Wiring Harness - 120/240V 1 42001-0104S

• 120/240 Volt Plug Kit 42001-0105S

14 Heater, Top 42002-0034Z

15 Membrane Pad (NA, LP Series) 472610Z

16 Stack Flue Sensor 1 42002-0024S

• Not available separately.

* Kit parts not available separately.

13

16

1

15

14

2

3

4

11

10

8

9

127

6

5


54

NOTES


55

NOTES


56 40

1620 HAWKINS AVE., SANFORD, NC 27330 • (919) 566-8000 10951 WEST LOS ANGELES AVE., MOORPARK, CA 93021 • (805) 553-5000 www.pentairpool.com

All Pentair trademarks and logos are owned by Pentair, Inc. Pentair Aquatic Systems™, MasterTemp®, IntelliTouch®, EasyTouch®, are trademarks and/or registered trademarks of Pentair Water Pool and Spa, Inc. and/or its affiliated companies in the United States and/ or other countries. Unless expressly noted, names and brands of third parties that may be used in this document are not used to indicate an affiliation or endorsement between the owners of these names and brands and Pentair Water Pool and Spa, Inc. Those names and brands may be the trademarks or registered trademarks of those third parties. Because we are continuously improving our products and services, Pentair reserves the right to change specifications without prior notice. Pentair is an equal opportunity employer. © 2013 Pentair Water Pool and Spa, Inc. All rights reserved. This document is subject to change without notice.

P/N 475000 REV. A 11/13

Documents

MASTERTEMP 125 HIGH PERFORMANCE HEATER …...Rev. A 11/13 ® MASTERTEMP 125 Pool and Spa Heater Installation and User’s Guide. 7 The MasterTemp ® 125 Heater is designed and manufactured