6.0 to 11.2 gph oil 840 to 1600 mbh gas...proximately 70,000 btuh. pilot gas is introduced and...

™

126 Bailey Road North Haven, CT 06473Ph 203-680-9401 Fx 203-680-9403

C a r l i n C o m b u s t i o n Te c h n o l o g y

Tech support 800-989-2275 carlincombustion.com

© Copyright 2020 — Carlin Combustion Technology

Exceptwherespecificallystatedotherwise,thismanualmustbeusedonlybyaqualifiedservicetechnician.

In the state ofMassachusetts, this productmust beinstalledbyalicensedPlumberorGasFitter.

Failuretocomplywiththeaboveorotherrequirementsin thismanualcould result inseverepersonal injury,deathorsubstantialpropertydamage.

USER—Referonly toUsercareandmaintenanceonbackpage for information regardingoperationofthisburner.TheburnerInstructionManualisintendedonlyforyourservicetechnician.Theburnerandheatexchangermustbeinspectedandstartedatleastan-nuallybyyourservicetechnician.

Check burner cartons carefully.TheModel 702G/Ocombinationgas/oilburnerwasassembledandtestedatthefactorybeforeshipment.Iftheburnerwasorderedwithacompletedassembledgas train, the trainwaspressure tested and electrically checked for properoperation.Wherepossible,thegastrainorcomponentswereshippedinthesamecartonastheburner.Checkyourpacking slip for thenumberof cartons shippedfromthefactory.

MODEL 702G/OCombination Gas/Oil Burner

Low-High-Low Step Modulating

6.0 to 11.2 GPH Oil 840 to 1600 MBH Gas

(High-fire input capacities)

Instruction Manual

Model 702G/O Advanced gas/oil burners — Instruction manual

MN702GO1 022120v2– 2 –

Where appliance instructions differ from this manual, follow the appliance instructions.

ContentsPLEASEreadthisfirst.................................................................2

Generalinformation.....................................................................3

1.TheCarlinModel702G/Ocombinationgas/oilburner.........4

2.Pre-fireInspection/Preparation.............................................5

3.Installgaspiping.................................................................12

4.Installoilpiping...................................................................14

5.Wiretheburner...................................................................16

6.Checkoutprocedure—beforestartingtheburner.............18

7.Setburnerinitialheadanddamperpositions.....................18

8.Adjusttheburnerusingtestinstruments............................20

9.Maintenanceandserviceprocedures................................25

10.Repairparts........................................................................28

11.Dimensions.........................................................................31

Usercareandmaintenance........................................ Rearcover

PLEASE read this first . . .

Special attention flags . . .Please pay particular attention to the followingwhen you see themthroughoutthismanual.

NotifiesyouofhazardsthatWILLcauseseverepersonalinjury,deathorsubstantialpropertydamage.

NotifiesyouofhazardsthatCANcauseseverepersonalinjury,deathorsubstantialpropertydamage.

Notifies you of hazards thatWILL orCAN causeminorpersonalinjuryorpropertydamage.

Notifiesyouofspecialinstructionsoninstallation,operationormaintenance that are important, but arenot normallyrelatedtoinjuryorpropertydamagehazards.

Before installing or servicing:

(1)Shutofftheoilandgassuppliestotheburner. (2)DONOTshutoffthecontrolswitchtotheboiler

circulatorortheburner.

Followtheguidelinesbelowtoavoidpotentialseverepersonalinjury,deathorsubstantialpropertydam-age.

Installer/service technician . . .• Readallinstructionsbeforeproceeding.Performallprocedures,

andintheordergiventoavoidpotentialofseverepersonalinjury,deathorsubstantialpropertydamage.

• Beforeleavingthesiteafterstartuporservice,reviewtheUsercareandmaintenancepagewiththeuser.Maketheuserawareofallpotentialhazardsandperformthetrainingoutlinedbelow.

Installer/service technician — Train the user . . .• Toproperlyoperatetheburner/applianceperthismanualand

theapplianceinstructions.SeeUsercareandmaintenance.• Tokeepthismanualatorneartheburner/applianceforready

accessbytheuserandservicetechnician.• Tokeeptheappliancespacefreeofflammableliquidsorvapors

andothercombustiblematerials.• Toneveruselaundryproducts,paints,varnishesorotherchemi-

calsintheroomoccupiedbytheburner/appliance.• Tocontacttheservicetechnicianatleastannuallyforstartupand

burner/applianceservice.

When servicing the burner . . .• DISCONNECTELECTRICALSUPPLYandallotherelectrical

connections to burner before attempting to service to avoidelectricalshockorpossibleinjuryfrommovingparts.

• CLOSEallmanualgasandoilvalvesbeforedisconnectinganyportionoffuellinesandbeforecleaningorremovinganypartsfromtheburnerorrelatedequipment.

• Burnerandappliancecomponentscanbeextremelyhot.Allowallpartstocoolbeforeattemptingtohandleorservicetoavoidpotentialofsevereburns.


MN702GO1 022120v2 – 3 –


Burner applicationsFollowallinstructionsinthismanual,theprimarycontroldatasheetandtheappliancemanual.Adjustthenozzleselection/firingrateifnecessaryduetopositiveoverfirepressureand/oraltitudesmorethan2,000feetabovesealevel.SeetheNOTICEundertheRatingsinformationatright.Whereapplianceappli-cationinformationisavailable,therecommendedfiringrateandburnerinformationwill include appropriate adjustments for positive overfirepressureandrecommendationsforhighaltitudes.Followtheappliancemanualguidelineswhenavailable.

Damage or shortage claimsThe consigneeof the shipmentmust file damageor shortage claimsimmediatelyagainst the transportationcompany.See theNOTICEonpage1forburnercartoninformation.

When calling or writing about the burner:PleaseprovideuswiththeULserialnumberandburnermodelnumbertoassistusinlocatinginformation.Thisinformationcanbehelpfulwhentroubleshootingorobtainingreplacementparts.

Codes and standardsCertification702G/OburnersareU.L.listedfortheU.S.,certifiedtocomplywith:• ANSI/UL296,forusewith#1or#2heatingoil(perstandardASTMD396).• UL795,forusewithnaturalgasorpropane.• CULcertifiedCSAB140.2.1.10,CGA3.4-1973• Burnerlabelslistcompliance,whenrequired,withspeciallocal,state

orprovincialapprovals.• 702G/Oburnerscanbeconfiguredforlocalcodecompliancy.United States installationsBurner/applianceinstallationsintheUnitedStatesmustcomplywiththelatesteditionsof:• InstallationofDomesticGasConversionBurners,ANSIZ21.8.• NationalFuelGasCode,ANSIZ223.1/NFPA54.• StandardfortheInstallationofOil-BurningEquipment,NFPA31• NationalElectricalCode,ANSI/NFPA70.• Alladditionalapplicablenational,stateandlocalcodes.Regulations

of theseauthorities takeprecedenceover thegeneral instructionsprovidedinthismanual.

Ratings Altitude2,000feetmax.(seeNOTICEbelow)

Oil Input .......................................................High fire: 6.0 to 11.2 GPH ..........................................................Low fire: 3.5 to 6.5 GPH

Gas Input .....................................................High fire: 840 to 1,600 MBH .........................................................Low fire: 490 to 940 MBH

Fuels ...............................................................No. 1 or No. 2 Fuel oil ............................................................Natural gas or propane

Fuel Unit & Oil Valves ... Fuel unit, 2-stage, 300 psig (with internal blocking valve) ............................................................. (2) Oil solenoid valves

Gas Train (available in straight or angled configuration) .................... (2) Main gas valves & RV-61 or RV-81 regulator ................................. Butterfly gas valve for input regulation .... 1" gas train standard; 1¼", 1½" or 2" gas train available

Electrical Power .......................................................120V/60 Hz/1-Phase Limit circuit input (RM7895C or RM7897C) .... 120 vac/60 hz Control circuit load (120 vac) ...................................1.2 amps Motor ........................ 1/2 hp, 3450 rpm, 48-frame, “N” flange .................... 115 / 208-230 vac/60 hz/1-ph, 8.4 / 3.8-4.2 amps Oil valve/gas valve power ................................ 120 vac/60 hz Damper motor ...............................................Siemens SQN71

Ignition & Primary Control Oil ........Carlin Model 45000 electronic ignitor, 14,000 volts Gas ........Carlin Model 41800 electronic ignitor, 9,000 volts Primary ..................................................Honeywell RM7897C Alternate ........................................................ Fireye MEC120Agencies ...........................................................................UL Listed (US)

Reduce nozzle/firing ratewhen required –Maximumburnercapacityisreducedwhenoverfirepressureispositiveandforaltitudesabove2,000 feet.Seebelow,andadjust firing rate/nozzleselectionifnecessary.

General information

702G/O — Maximum firing rate for positive overfire pressure and high altitude

Overfire pressure (Inches w.c.) Oil – GPH Gas – MBH

0.00 11.2 1,600

0.10 10.9 1,530

0.20 10.7 1,500

0.30 10.6 1,480

0.40 10.3 1,440

0.50 10.2 1,430

0.60 9.9 1,390

Altitudes: For altitudes more than 2,000 feet above sea level, reduce the above capacities an additional 4% per 1,000 feet higher than 2,000 feet above sea level.


MN702GO1 022120v2– 4 –


702G/O overviewTheModel702G/Ocombinationgas/oilburner isa low-high-low(stepmodulating)burnerthatutilizesadampermotortocontrolair(andgasfuelrate).FuelisselectedusingtheGas/oilchangeoverswitch.Theburneroperatesoneither#2fueloilorgas(naturalorpropane).

Seethenextpageforgastraincomponentlocations.

Gas mode operation

Ignition formain flame is accomplishedby a provedgas pilot of ap-proximately70,000Btuh.PilotgasisintroducedandignitedbyaCarlin9,000-voltelectronicignitorwiredtotheelectrode.Afterthepilotflameisproven,thetwomaingassafetyvalvesopen.Thepilotgasvalveclosesafteratimedelaytoallowmainflametoestablish.FlameismonitoredbothforpilotflameandmainflamewithaUVscannerpositionedinthemountingflange.Theburnermainflamebeginsatlowfire.Ifadditionalinputisrequired,thedampermotoropensthegasbutterflyvalveandairdampertotheirhighfirepositions.

Gas is introduced into the burner through amanifold around the airtube.Thegas then circulates througha set of four orifice spuds intotheairstream,upstreamof theretentionring.Thespinof theairflowattheretentionringthoroughlymixesthegas/airbeforeitreachesthecombustionzone.

Oil mode operation

Oil ignition isaccomplishedbytheCarlin14,000-voltelectronic ignitorwiredtothetwoelectrodes.Theoilflamebeginsatlowfire,with100psig oilpressureatthenozzle.Ifadditionalinputisneeded,thedampermotoropenstheairtothehighfireposition(referenceSupplementMNSQN71fordetailedinstructionsonoperatingthedampermotor).Thetransitioncam(orange)energizesthe2ndstageoilvalve(fuelunitblockingvalve)asthedamperapproachesitshighfireposition.Thisprovides300psig pressure to theoilnozzle forhighfire.Flame ismonitoredby theUVscannermountedtotheundersideofthecombustionheadassembly.

Firing rate adjustment

• Firingrateisdeterminedbytheoilnozzle.Airflowismatchedtotheoilflowforoilfiring.Thengasflowisadjustedtomatchtheairflowatlowandhighfirerates.NOTE:HighFiremustbesetbeforeLowFire.

• Seethe“Startingandoperating”sectiononpage12ofthismanualforthecompletedescriptionoftheadjustmentprocess.Thefollowingisabriefsummaryonly.

• High-fireairissetbyadjustingthecombustionheadposition(tocontrolairflowthroughandaroundtheretentionring).

• Low-fireairisthenadjustedbyalteringthepositionofthelowfireadjust-ingscrew.

1. The Carlin Model 702G/O combination gas/oil burner

702G/O oil nozzles Use the selections belowwhen the heating equipmentmanufacturer’sspecificnozzleselectiondataisnotavailable,either in theequipmentmanualor theCarlinOEMSpecGuide.Followallinstructionsprovidedwiththeappliance.

Nozzle specifications• Preferred— Hago45°B• Alternate— Delevan45°BorMonarch45°PLP

Nozzle ratingsFullinput(highfire)occursat300psignozzlepressure.Sincenozzlesareratedat100psig,theactualflowat300psigisapproximately73%higher than the ratednozzlecapacity.See the tablebelow fornozzleratingselections.

Table 1 702G/O oil nozzles

Oil Nozzle Sizing

EquipmentInput rating

GPH

Recommendednozzle rating

GPH

Low fireinput

(100 psig)

High fireinput

(300 psig)

6.00 3.50 3.50 6.00

6.50 3.75 3.75 6.50

6.90 4.00 4.00 6.90

7.80 4.50 4.50 7.80

8.70 5.00 5.00 8.70

9.50 5.50 5.50 9.50

10.40 6.00 6.00 10.40

11.20 6.50 6.50 11.20

1. For a packaged appliance application on which the burner has been tested, use the noz-zle given in the appliance manufacturer's instructions or supplement for the best results.

Gas pressure requirementsStandardgastrainrequirementsforthe702G/Oburnerrequiresamini-mumw.c.inletof5"underflowconditions(maximum14").Systemswithhighpressure(above14"w.c.)requirealinepressureregulatorupstream.


MN702GO1 022120v2 – 5 –


2. Pre-fire inspection • preparation

Vent system

Vent/chimney sizing1. Followalllocalcodeswhensizingtheventandchimney.2. Refertotheappliancemanufacturer’smanual,whenavailable,forventing

recommendations.

Combustion air/ventilation openings

Combustion air/ventilation opening checklist• Verifythatairopeningsareunobstructed.• Verifythatappliancespaceandairsourcespacesarefreeof:

• Gasolineorotherflammableliquidsorvapors.• Combustiblematerials.• Aircontaminants,suchaslaundryproducts,paint,thinner,varnish,etc.

• Confirmwithuser that theareawillbekept freeof thesematerialsatalltimes.

• Allairfrominsidebuilding(buildingmustbewell-ventilated): Sizeairopeningsforafreearea(afterlouverdeduction)ofatleast1

squareinchper1,000Btuhinputofallappliancesinthespace.• Allair throughopeningsdirectly fromoutside thebuilding throughan

adjacentoutsidewall: Ifairopeningsconnectdirectlytooutside,providetwoopenings,one

within12inchesoftheceiling,theotherwithin12inchesofthefloor.Eachopeningmusthaveafreearea(afterlouverdeduction)of:• Ifdirectly throughsidewall:1square inch foreach4,000Btuhofall

appliancesinthespace.• Ifthroughverticalducts:1squareinchforeach4,000Btuhofallappli-

ancesinthespace.• Ifthroughhorizontalducts:1squareinchforeach2,000Btuhofallap-

pliancesinthespace.

Donot installoroperate theburner ifanycomponent isdamagedorifburnerdoesnotcomplywithotherguidelinesofthismanualandtheappliancemanual.

Inspect, repair and/or replace vent system

Donotinstallthisburnerunlessyouhaveverifiedtheentireventsystemandtheapplianceareingoodcondition and complywith all applicable codes. And...

The vent and chimneymust be sized and con-structedinaccordancewithallapplicablecodes.Ifintendedforusewithanoilburneraswell,theventsystemmustcomplywithrelevantcodesforbothgasandoilfiring.

Theventsystemmustnotbepressurizedunlesstheventpipingandventsystemaredesignedac-cordingly.Theventmustprovidedraftatalltimes(negativepressureinvent).

Donotinstalloruseanexistingmanualdamperintheventconnectororvent.

Donotconnecttheapplianceventconnectortoachimneyorventservingafireplace,incineratororsolid-fuel-burningapparatus.

Inacoldclimate,donotventintoamasonrychimneythathasoneormoresidesexposedtotheoutside.Installalistedstainlesssteellinertoventtheflueproducts.

Adefectiveventsystemcouldresultinsevereper-sonalinjury,deathorsubstantialpropertydamage.


MN702GO1 022120v2– 6 –


2. Pre-fire inspection • preparation (continued)

Prepare vent/chimney1. Secureallmetalventjointswithscrews,followingtheventmanufacturer’s

instructions.Sealalljointsintheventsystemandchimney.Repairma-sonrychimneyliningandrepairallmortarjointsasneeded.

2. Wheredraftfluctuationsarelikely,installadouble-actingbarometricdraftregulatorintheventpiping.(Thedampermustbelocatedinthesamespaceastheappliance.)Installamanualresetspillswitchinthetopofthedraftregulatoroutlet.Wiretheswitchintotheappliancelimitcircuittoshutofftheappliance/burnerifsustaineddowndraftshouldoccur.Refertotheappliancemanufacturer’sinstructionmanualforrecommendationsregardingtheneedforabarometricdraftregulator.

3. Providesupportfortheventpiping.Donotresttheweightofanyoftheventpipingontheapplianceflueoutlet.

Clearances

Check codes, standards and the equipment manual• Verifythattheburner/appliancewillmaintainallclearancestocombustible

walls or floor andall clearances required for service/maintenanceasrequiredintheappliancemanualandapplicablecodes.

Figure 1 Vent and vent connector installations, typical


MN702GO1 022120v2 – 7 –


Prepare the appliance

Burnerinput:Installaburnersizedforthenormalinputrat-ingoftheappliance.Donotinstallaburnerwithahigherfiringratethantheappliancerating.Donotinstallaburnerwithafiringratemorethan10%lowerthantheappliancerating.Theapplianceandventsystemcouldbedamagedduetocondensation.

Cleantheappliance:Cleantheappliancethoroughly.Testallelectricalcomponentsandverifythereliefvalveworks(boilersonly).

Sealtheappliance:Sealallflue-gascontainingjoints.Sealallconnectionstotheventpipingorbreeching.

Verify combustion chamber dimensions complywith theminimumdimensionsrecommendedonpage9.Installorreplacechamberlinerifrequiredbytheappliancemanu-facturer.Theburnermustnotextendintothecombustionchamber.Theendoftheburnerairtubemustbewithi1/4"oftheinsidefaceofthechamber.Ifthespacearoundtheburnerairtubeismorethan1/4",wraptheburnerairtubewithminimum2300-°F-ratedceramicfiberblankettosealoffthegap.

Repairorreplacedamagedappliancecomponents.Inspecttheappliancethoroughly.Followappliancemanufacturer’sguidelinesforrepairorreplacementofanycomponentfounddefective.

Whencleaningtheapplianceorworkingwithceramicfiberrefractoriesorfiberglassinsulation,seeWARNINGonthispage.

Failure to complywith the above could result in severepersonalinjury,deathorsubstantialpropertydamage.

Prepare appliance for burner mounting

Positive overfire pressure applications:When firingwithpositive overfire pressure, do not exceed the pressurespecifiedintheappliancemanual.

Positiveoverfirepressurereducesmaximumburnercapac-ity.SeePage3forestimatedreductioninburnercapacitywithpressurizedfiringandhighaltitudeapplications.

Failure to comply could result in severepersonal injury,deathorsubstantialpropertydamage.

Ceramic fiber or Fiberglass insulation

Ceramicfibermaterials,suchaschamber liners,maycontaincarcinogenicparticles(chrystobalites)after exposure to heat.Airborne particles fromfiberglassorceramicfibercomponentshavebeenlistedaspotentially carcinogenicby theStateofCalifornia.Take the following precautionswhenremoving,replacingandhandlingtheseitems.

Avoid breathing dust and avoid contact with skin or eyes.Wear long-sleeved, loose-fittingclothing,glovesandeyeprotection.UseaNIOSHN95 certified respirator. This respiratormeets requirements for protection fromchrysto-balites.ActualjobrequirementsorNIOSHregula-tionsmay require other or additional protection.For information, refer to the NIOSHwebsite, http://www.cdc.gov/niosh/homepage.html.

Ceramic fiber removal:Topreventairbornedust,thoroughlywet ceramic fiberwithwater beforehandling.Placeceramicfibermaterialsinaplasticbagandsealtodispose.

Avoid blowing, tearing, sawing or sprayingfiber-glassorceramicfibermaterials.Ifsuchoperationsare necessary,wear extra protection to preventbreathingdust.

Wash work clothes separately from other laun-dry.Rinseclotheswasher thoroughlyafterwardstopreventcontaminationofotherclothing.

NIOSH First aid procedures: Eyeexposure—irrigateimmediately Breathing—freshair.



MN702GO1 022120v2– 8 –



Figure 2 Chamber dimensions & tube configurations

Table 2 Minimum combustion chamber dimensions (see Figure 3)

Prepare burner and components Donotinstalloroperatetheburnerifanycomponentisdam-agedor ifburnerdoesnotcomplywiththespecificationsofTable2andotherguidelinesinthismanual.

Combustion chamber minimum dimensions1. Forapplicationsthathavenotbeenspecificallytested(OEMapplications),

verifythatthecombustionchamberprovidestheminimumdimensionsshowninTable2andFigure2.ForspecificOEMapplications,theappliancetestingensuressuitabilityofthechamber.

2. Chamberdimensionsmaybe larger than listed inTable2,butshouldnotbeexcessivelylarge.

CombustionchambersshouldbesizedasrecommendedinTable2.Theyshouldbeconstructedof refractorymaterialswiththecapacitytowithstand2600°Forhigher.

Itisdifficulttoincludeallpossiblechamberconstructionsinthismanual.Therefore,youshouldusetheinformationpresentedinthismanualcombinedwithcommonlypracticedtechniqueswhendeterminingchamberdesign.Ifcertainconditionsareinquestion,consultthefactory.

Using chamber linings1. Whenusing refractory liners or lightweight chambers, use insulating-

typerefractoryrated2600°Fminimum,orasspecifiedbytheappliancemanufacturer.

2. Youmustinstallatargetwalllinerifflamelengthisclosetothelengthofthechamber.

3. Useafloorlinerwhenpossible.Thefloorlinerwillimprovefiringinmostapplications.Extendfloorliner3to4inchesupthesidewalls.

4. Targetwallliners—Extendtargetwalllinersatleast3to4inchesabovethecenteroftheflamecorbelthetop1½to2½inchesdeep.

5. Usepreformedchamberlinerswhenavailable.Liningthefloorandtar-getwallwater-backedcombustionchamberswithlightweightinsulatingrefractorywillaccomplishthesame.

6. Whenconvertingcoal-firedunits, installacombustionchamber in theashpitarea,orfilltheashpitwithsandupto2inchesabovethe“mudring”oftheboiler(firingthroughthedoor).Installalightweightrefractorylineronthetargetwall.

Air tube insertion length (UTL)1. Usableairtubelength(UTL)isthedistancefrommountingflangetoend

ofairtube.Verifythattheendoftheairtubewillbeflushwith,ornomorethan1/4inchshortof,theinsideoftheappliancecombustionchamberfrontwallwhentheburnerismounted.SeeFigure2forfurtherinformation.

NOTE:AspaceisavailableforanappliancewithaUTLlessthan4"(consultfactory).

High fire input Refactory combustion chamber applications(all dimensions in inches)

Oil–GPH Gas–MBH “L” “W” “C” “H”

6.00 840 21 15.0 7.5 15

6.50 910 23 15.5 8.0 16

6.90 966 25 16.0 8.0 16

7.80 1092 28 17.0 8.5 17

8.70 1218 31 17.5 9.0 18

9.50 1330 34 18.0 9.0 18

10.40 1456 38 19.0 9.5 19

11.20 1568 43 20.0 10.0 20

High fire input Refactory combustion chamber applications(all dimensions in inches)

Oil–GPH Gas–MBH “L”W/ target

“L”No target “W” “C” “D”

6.00 840 21 25 17.0 8.5 10.5

6.50 910 23 27 17.5 9.0 11.0

6.90 966 25 29 18.0 9.0 11.0

7.80 1092 28 32 19.0 9.5 11.5

8.70 1218 31 35 19.5 10.0 12.0

9.50 1330 34 38 20.0 10.0 12.0

10.40 1456 38 42 21.0 10.5 12.5

11.20 1568 43 47 22.0 11.0 13.0


MN702GO1 022120v2 – 9 –



Install the burner pedestal

702G/Oburnersarealsosuppliedwithapedestalforsup-portingtheburner.(Thepedestalisavailableasanoptionforaburnerequippedwithaweldedflange.)

1. Adjustthepedestalsothattheheightoftheairtubematchesthelocationoftheburneropening.

2. Thepedestalhasapproximately3"ofadjustment.Iftheburneropeningistoohighforthepedestaltorestonthefloor,thenconstructabase.Twosolidcementblocks,sidebyside,isrecommended.Alternatethedirectionaslayersareputdown.

3. Placeaspirit levelontheairtube.Adjustthepedestalsotheairtubeslopesdownslightlytowardtheappliance.Theslopeshouldbeabout2degrees.

4. Tightenthepedestalboltsecurely.

Install the oil nozzle1. Follow the instructions on page 10 to remove the combustion head

assembly.2. Installandtightenthenozzlelistedintheapplianceinstructionmanualor

theCarlinOEMSpecGuide.Ifnozzleinformationisnotavailable,beginwiththenozzlelistedonpage4.(Youmayhavetochangethenozzlelaterifcombustionresultsarenotacceptable.)

3. Holdthenozzleadaptersecurelywhenremovingorreplacingthenozzle.Takecarenottodamagetheelectrodeinsulatorsortobendtheelectrodesintheprocess.

Inspectthenozzleadapterbeforereplacingthenozzle.Ifthethreadshavebeendamagedorshowscoremarks,replacethenozzleline/adapterassembly.


MN702GO1 022120v2– 10 –



Installingtheburner/applianceinaspacethatdoesnotprovideenoughairforcombustionandventila-tioncanresultinseverepersonalinjury,deathorsubstantialpropertydamage.Followallapplicablecodesandguidelinesbelowtoensurespacehassufficientairopenings.

Exhaust fans and negative pressure conditions— Isolate theboiler room fromareas subject tonegativepressure.Sizecombustionairopeningstoensureneutralairpressure in theboiler roomwhenevertheburneroperates.

Makesurethespaceprovidesenoughventilationtopreventoverheatingoftheappliance,burnerandcontrols. If there isriskofoverheating,youmustinstallventilationairopeningssizedlargeenoughtoprovideairforcoolingtheequipment.Failuretoprovide ventilation can result in severepersonalinjury,deathorsubstantialpropertydamage.

The space and combustion air supplymust notcontain corrosive contaminants, suchas laundryproducts,paints,varnishesorotherchemicals.

Removing the combustion head assembly1. Tochecktheelectrodesettingsorchangethenozzle,youmustremove

thecombustionheadassemblyfromtheairtube.Followthestepsbelow,andreversethesequencetoreassemble.

2. Shutofftheburner.3. Removethefourgasorificespudsfromthemanifold(Figure3A).4. Disconnectthe1/4"O.D.copperoilline.5. Removethetwohousingcoverlockingscrewsandswingthehousing

open.6. Partiallyremovethecombustionheadassembly,anddisconnectthetwo

ignitioncablesfromtheelectrodesandthermalfusewires.

Setting the electrodes1. Checktheelectrodesandrepositionifnecessary.Positiontheelectrodes

asshowninFigure3.Thesesettingsarecriticalinensuringareliableignition.

2. Oncetheelectrodesareset,checkallclampstobesuretheyaresecurelytightened.

3. Insertthecombustionhead/nozzleassemblyintotheburnerandsecureinplace(seeinstructionsabove).

Figure 3 Electrode settings

Figure 3A Gas orifice location

Inspect components and wiring

• Visuallyinspectallburnercomponentsandwiring.

• Verifythatwiringisintactandleadsaresecurelyconnected.

• Verifythatallburnercomponentsareingoodcondition.

Spacing from electrode tipto nozzle = 1/4"

Gas orifice spuds (2 on each side)Spuds are non-directional


MN702GO1 022120v2 – 11 –



Install gas train on burner1. Thestandardburnergastrainisshippedfullyassembled,withthepiping

disconnectedatthegastrainunions.Seeseparateinstructionsifinstallinganoptionalknockeddowngastrain.Thegastrainisavailableineitheranangled(standard)orstraight(optional)configuration.

2. Connectthemaintrainsattheunions(Figure4).

Toavoiddamagetogastraincomponents,donotholdcompo-nentswithapipewrenchorovertighten.Useonlyacrescentwrenchorothermeans.Failuretocomplycouldresultinseverepersonalinjury,deathorsubstantialpropertydamage.

3. Connecttheflexibleconduit,pre-attachedtotheburnerJ-box,tothegastrainJ-box,andattachthewirestotheterminalstripinsidethegastrainJ-box.a. Matchwirecolorsoftheincomingwirestothosepre-wiredtotheterminal

stripinsidethegastrainJ-box.b. Seethelabelintheburnerjunctionboxorthewiringdiagramonpage17.

Gasvalveventopening—TheV48diaphragmgasvalveisNOTfittedwithaventlimitingorificeintheventconnection.Iflocalcodesrequire,installpipingfromtheventconnectiontooutside,sizedandinstalledasrequiredbycodes.Becausethisisadiaphragm-assistedsolenoidvalve,asmallamountofgaswillexitfromtheventorificeeachtimethevalveopens.

Figure 4 Gas train installation (shown with straight gas train)

Figure 4A Gas Piping Schematic

Connect main gas train at union

Connect pilot gas train at union

GAS FUEL TRAINGas Input

F A

A

A

MTest

To Main Burner

To Pilot Burner

J

R1 BS

R2 S C

S

Sediment Trap

A Manual ValveB Firing Rate ValveC OrificeD Manual Reset Low Gas Pressure Switch (optional)E Manual Reset High Gas Pressure Switch (optional)F Gas Filter or Strainer (if required)

J Leakage Test ValveM Pipe CapR1 Main Gas Pressure RegulatorR2 Pilot Gas Pressure RegulatorS Safety Shutoff Valve

D E


MN702GO1 022120v2– 12 –


3. Install gas piping

Piping from gas meter to burnerNOTE:Refertoincludedsupplementforfuelpipingschematic1. Ifpossible,installanewgaslinedirectlyfromthegasmeter.Ifyouare

usinganexistinggasline,verifyitiscleanandingoodcondition,andverifyitislargeenoughtohandletheloadofallconnectedappliances.

2. Whenbranchingfromacommongasline,donottapofffromthebottomofhorizontalsections—onlyfromthesideortop.

3. Installamainmanualshutoffvalve,sedimenttrapandgroundjointunionneartheburnergastrainconnection.

4. Sizepiping(orverifysize)usingTable3.Youwillfindadditionalinfor-mationongaslinesizingintheNationalFuelGasCode,ANSIZ223.1. Gassupplypressure—naturalgasorpropane• Maximumsupplypressure: 14inchesw.c.• Minimumsupplypressure: 7inchesw.c.

Test and purge gas lineReadWARNINGabove.Pressuretestandpurgetheline.Pressuretestingshouldbedonebythegassupplierorutility,followingallapplicablecodes.

Connectfromthegassupplytotheburnergastraininletusingnew,cleanblackironpipeandmalleableironfittingsonly.Donotusecopper,brass,castironorgalvanizedpipeorfittings.

Providesupportforgaspiping.Donotresttheweightofthegaspipingonburnergastrain. Provideasupportfortheburnergastrain. Applypipedopesparinglyatalljoints.Useonlypipedopelistedforusewithpropanegas.Donotusepipesealingtape. Donotholdthegasvalvewithpipewrench.Usecrescentwrenchorothersmooth-jaweddevice.Donotovertighten. Failuretocomplywithabovecouldresultinseverepersonalinjury,deathorsubstantialpropertydamage.

Donotexposethegastraintogaspressureinexcessof14incheswatercolumn.Higherpressurecoulddamagethevalveseat,resultinginpotentiallyhazardouscondition.Whenpressuretestingpipingathigherpressures,disconnectburnerfromgaslinebeforetesting.

Ifthegassupplypressurecanexceed14incheswatercolumnatanytime,youmustinstallalockuptypegaspressureregulatorinthegassupplypiping,aheadofthemainmanualgasvalveinstalledattheburner.

Figure 4A Connecting gas supply piping to burner (shown with straight gas train)

1 Pipetometerorbranch

2 T-handlemainmanualgasvalve

3 Useclean,burr-freeblackironpipeandmalleableironfittings

4 Groundjointunion

5 Sedimentleg

6 Pressuretap,1/4"(upstreamshown,outletnotshown)

7 Gasregulatoraccessscrew(theregulatorspringislocatedundertheadjustingscrew)

8 Gastrainwirejunctionbox


MN702GO1 022120v2 – 13 –


NATURAL GASCapacities in Cubic feet per hour

for Schedule 40 metal pipe

Pipe size (inches)

Total length of gas piping,from meter to burner connection (feet)

20 40 60 80 100

Natural gas @ .60 specific gravity, pressure drop 0.3 in. w.c. (note 1)

1¼ 730 500 400 350 305

1½ 1,100 760 610 530 460

2 2,100 1,450 1,150 990 870

2½ 3,300 2,300 1,850 1,600 1,400

Natural gas @ .60 specific gravity, pressure drop 0.5 in. w.c. (note 1)

1¼ 950 660 530 460 400

1½ 1,460 990 810 690 620

2 2,750 1,900 1,520 1,300 1,150

2½ 4,350 3,000 2,400 2,050 1,850

Note 1 For natural gas with specific gravity other than 0.60, consult National Fuel Gas Code for correction factor.

PROPANE GASCapacities in Btuh for

Schedule 40 metal pipe

Propane gas @ 1.5 specific gravity, pressure drop 1 psi

½ 1,839 1,264 1,015 869 770

¾ 3,845 2,643 2,122 1,816 1,610

1 7,243 4.978 3,998 3,422 3,033

Propane gas @ 1.5 specific gravity, pressure drop 0.5 in. w.c.

1 787 541 434 372 330

1¼ 1,616 1,111 892 677 543

1½ 2,422 1.664 1,337 1,114 1,014

Table 3 Capacities of black iron pipe, cubic feet gas/hour Figure 5 Gas train pressure drop

3. Install gas piping (continued)


MN702GO1 022120v2– 14 –


Inspect/install fuel supply Inspecttheoilsupplysystem.Ensurethatthefuellinesarecorrectlysizedandinstalledandthatthefuelflowisunob-structed,theoiltankiscleanandonly#1or#2heatingoilaresupplied.Failuretosupplyareliableoilflowcouldresultinlossofheatandpotentialsevereequipmentdamage.

1. SeeFigure6fortypicaltwo-lineoilpiping.2. Seepage15,Figures7and8,forfuelunitoilflowdiagrams.3. Installthefuelunitbypassplug(two-linesystemsonly).

Fuel unit vacuum limitations• SeeTable4forallowableliftsandlengthsofoillines.• Thevacuumatthefuelunitinletportmustnotexceed12inchesmercury

duringanyoperatingcondition.• Attachavacuumgaugetoeitherofthefuelunitinletports,andverify

thevacuumdoesnotexceedthelimitbelowduringallfiringconditions.

Oil flow schematic / fuel unit connections• Figure7showsoilflowand fuelunitport functions forCarlin702G/O

burners.• Figure8appliesonlyforoptionalNYC-DARpressureregulationkits.

Fuel supply to multiple burners• Whenpossible,useseparatefuelsupplylinesforeachoilburner.Using

manifoldedoilsupplylinescancreateproblems.Ifthelinesareunder-sized,operatingvacuumwillexceed limits. If the linesareoversized,fuelunitsmayhavedifficultypriming.Becausethelinesmustbesizedtohandlethecapacityofalltheburners,thelinesizewillalmostalwaysbetoolargewhenonlyasingleburnerisrunning.

• Ifmanifoldingcannotbeavoided,carefullysizethelinesfollowingthefuelunitsmanufacturer’sinstructions.

4. Install oil piping

Use two-line oil piping only Usetwo-lineoilpipingonly.

Fuel unit bypass plug Thefuelunitisshippedwithitsbypasspluginstalled.Operatingwiththepluginplaceonaone-linesystem(notrecommended)willdamagethefuelunitandcouldleadtooilleakageandfirehazard.

Ifthefuellineorfuelsupplyisabovetheburner,neverexceed3PSIGpressureatthefuelunitinlet.InstallasuitableOSVtoreducethepressure.Operatingthefuelunitwithhigherinletpressurecouldresultinfuelunitsealdamage,oilleakageandpotentialfirehazard.

Guidelines:• When installing oil lines, use continuous runs of heavy-wall

coppertubingifpossible.• Check fuel unit (oil pump) data sheet for recommended line

sizing,liftlimitationsandmaximumlength.• Checkallconnectionsandjointstoensuretheyareair-tight.• Useflarefittings.DONOTusecompressionfittings.• Neverusepipesealingtape.Fragmentscanbreakoffandplug

fuellinecomponents.• Installashut-offvalveatthetankandoneneartheburner.(Use

fusiblehandledesignvalveswhenpossibleorwhenrequiredbycodes.)

• Installalargecapacityfuelfilter(ratedfor50micronsorless)neartheburner.


MN702GO1 022120v2 – 15 –


Figure 6 Two-line fuel system

Table 4 Two-line fuel system – allowable lengths and lifts

Lift(feet)

Length of tubing (feet)

3/8” O.D. 1/2” O.D.

0 41 100

2 37 100

4 32 100

6 28 100

8 24 96

10 20 80

12 16 64

14 — 48

16 — 32

Figure 8 702G/O burner with NYC-DAR pressure regulation kit

ObtainpressureregulatorkitsforNewYorkCityDepartmentofAirResourcesfromCarlin.Kitsmustbesetforthepropernozzlepressure.

4. Install oil piping (continued)

Figure 7 702G/O fuel unit and flow diagram (Low fire pressure is 100 PSIG, adjusted by screw on top of blocking valve; High fire pressure is 300 PSIG, applied when blocking valve is powered)


MN702GO1 022120v2– 16 –


Figure 8 702G/O burner wiring using Honeywell RM7897C primary control (see appliance manual or separate wiring information for burner equipped with a primary control not covered in this manual); see Figure 7 for a legend to callouts.

Turnoffpowertoappliancewhenservicingburner.Failuretocomplycould result inseverepersonal injury,deathorsubstantialpropertydamage.

Figure 7 Legend for Figure 8

5. Wire the burner — RM7897C primary control

Wire the burner (RM7897C primary control) 1. All wiring must comply with:

In the U.S. – the National Electrical Code, ANSI Z223.1/ NFPA 54. In Canada – the Canadian Electrical Code Part 1, CSA standard C22.1. All applicable local codes/standards.

2. Connect the burner following Figure 8 and any special instructions or wiring diagrams provided with the appliance, burner or other components.

3. The burner requires a 120 VAC/60 hz/single-phase control power supply, with a 10-amp fuse. The control circuit cur-rent draw is approximately 1.2 amps. An additional power source is required for the motor (120 VAC or 208-220 VAC, 60 hz), with fuse sized accordingly. See Figure 9 for field wiring connections.

4. Read the Honeywell RM7897C instructions for information on setting a room thermostat, if used.

5. Make sure the burner and appliance are correctly wired and the line switch is properly fused for the load.


MN702GO1 022120v2 – 17 –


Low-High-Low step modulationTo take advantage of the energy-saving potential of the Model 801GAS burner, it should be wired to operate at low-high-low cycles. The firing cycle can be much longer using low-high-low firing, because the burner can cycle to low fire as demand decreases. This keeps the burner on longer, reducing cyclic losses.

1. Theappliancemustbeequippedwithahighfirecontrol.Thiswouldbeamake-on-fallcontrol,eithertemperature(waterboiler)orpressure(steamboiler)activated.Readtheappliancemanualforthelocationofthehighfirecontrol,whenused.

2. SeeFigures8and9Atoconnectthehighfirecontroltotheburnerfiringratecircuit.

3. Theburnerincludesapre-wiredmanualhigh-fireswitch.Closethisswitchtoholdtheburnerinhighfiremode.Opentheswitchtoholdtheburnerinlowfiremode.

5. Wire the burner — RM7897C primary control (continued)

Figure 9A 702G/O Mass Code wiring diagram (burners with RM7897C primary only); see Figure 9 for a legend to callouts

Turnoffpowertoappliancewhenservicingburner.Failuretocomplycould result inseverepersonal injury,deathorsubstantialpropertydamage.

Figure 9 Legend for Figure 9A


MN702GO1 022120v2– 18 –


6. Checkout procedure — before starting the burner

Followtheproceduresonthefollowingpagestoensuretheburneriscorrectlyadjusted.Takeyourtimeandtheresultsinbothgasandoilmodesshouldresultingoodoperation,andavoidreturnservicecalls.

Youmustperformtheadjustmentsinthesequencegiveninthismanual.

Failuretofollowthecorrectprocedurescouldresultinseverepersonalinjury,deathorsubstantialpropertydamage.

Before firing the burner . . . Shouldoverheatingoranemergencyoccur,immediatelydothefollowing:

• Shutoffoilsupplylineandgassupplyvalves. • Undersomecircumstancespowershouldremain

onforwaterpumpsorblowers.Determineproperresponsebeforeattemptingstart-up.

• Ifburnerfailsignitiononseveralattempts,useburnerblowertopurgeappliancechamberbeforerestart.

Ifburnerisrunningonnaturalgasonly(nooilsupply).couplingmustberemoved.

Checklist before firing . . .

❏ Burner and appliance installed per thismanual and applianceinstructionmanual?

❏ Burner/applianceinstalledperallapplicablecodes? ❏ Installationsitehasadequatecombustion/ventilationairopeningsandventsystem?

❏ Arevoltagescorrect?Burner,applianceandmotorcorrectlywiredperburnerandappliancemanualsandwiringdiagrams?

❏ Gasmanifoldspudorifices(ongasmanifold,item29,page5)sealedwithpipedopeandtight?

❏ Iscorrectnozzleinstalledandtightenedproperly? ❏ Gasandoil supply lines in good condition, sizedanddesignedcorrectly?

❏ Gasandoillineconnectionsandfittingstight? ❏ Oiltankhasoil,andoillinevalvesareopen.Oilsupplyandreturnlinespurged?

❏ Burner, appliance and all components inspected and in goodcondition?

❏ Appliancelimitandoperatingcontrolsproperlyinstalled,wiredandadjusted?

❏ Boilerwatersupply,feedpumps,automaticfeeders,andlowwatercut-offsproperlypipedandwired?

❏ Breeching, draft regulator, draft inducer (if required) properly in-stalledandoperational?

❏ Gas train piping and components correctly installed, tested andverifiedgastight?

❏ Ventlinesinstalledwhenrequired? ❏ Gaslinespurged? ❏ Sufficientgaslinepressurepresent? ❏ Verifyelectrodesettings(page7,figure1)

Figure 9 Set initial combustion head position

7. Set burner initial head and damper positionsBefore firing the burner . . .

Set combustion head (Dimension “A”)1. Thecombustionheadadjustingscrewisusedtosetthespacingbetween

theretentionringandthrottlering(oraircone),regulatinghowmuchairpassesaroundtheretentionring.

2. SeeFigure9B.Loosenthetwohousingcoverscrews.ThenrotatetheheadadjustingscrewuntilthedistancefromthehousingdetenttothebeginningofthescaleorscribedlineequalsthevaluegiveninTable5(Dimension“A”).Tightenthehousingcoverscrews.


MN702GO1 022120v2 – 19 –


Set air damper (low fire position)SeeFigure10.Adjustthebluecamondampermotoruntiltheairopeningbetweenthedamperbladeandthedamperhousingequalstheinitiallow-fireopeninginTable5.

Set air damper linkage MakesureAirDamperLinkageissetat¾"fromthetopoftheDamperMotorandthebottomofthelinkagescrew(seeFigure10A).Ifyoursettingsareoff,loosenthetwohexheadscrewsfoundonthelinkagearmbossesatthetopandbottomoftheAirDamperLinkage.Adjustthelinkageaccordingly,thentightenscrewstosetposition.

Figure 10 Set initial low fire air damper setting

Figure 10A Set air damper linkage

Table 5 Initial burner settings (see the pages 18 through 22 for final adjustments using test instruments)

7. Set burner initial head and damper positions (continued)

3/4"

Determining final adjustmentsTheburnerisnowadjustedtotheapproximateairsettingsforthefiringrateused.Followtheproceduresonthefollowingpagestouse test instruments andmakefinalburneradjustments.

Low-fire Input High-Fire Input Combustion head position

Dimension “A” Inches (approximately)

Air damper low-fire opening

Inches (approximately)

Siemens Blue Cam

Settings

Butterfly valve open – low fire

(factory set)% (approximately)# 2 Fuel Oil

GPH @ 100 PSIG (Nozzle Rating)

Natural GasMBH

# 2 Fuel OilGPH @ 100 PSIG (Nozzle Rating)

Natural GasMBH

3.50 490 6.00 840 0 3/8 25 30

3.75 525 6.50 910 1/16 3/8 25 30

4.00 560 6.90 966 1/8 7/16 27 30

4.50 630 7.80 1092 3/16 7/16 27 30

5.00 700 8.70 1218 3/8 1/2 30 30

5.50 770 9.50 1330 5/8 1/2 30 30

6.00 840 10.40 1456 1-1/8 9/16 35 30

6.50 910 11.20 1568 1-3/8 9/16 35 30

Nozzle SpecificationsStandard Hago 45° SS

Alternates Hago 45° PMonarch 45° PLP


MN702GO1 022120v2– 20 –


Adjustment procedure, summaryStep 1: Sethigh-fireoil airflowbyadjusting thecombustionhead.See

detailsfollowing.

Step 2: Adjusttheairdamperforlow-fireoil.Seedetailsfollowing.

Step 3: Adjustthedampermotorendswitch(onlyifnecessary).Seedetailsfollowing.

Step 4: Setgaspilotoperation.Seedetailsfollowing.

Step 5: Sethigh-firegasflowtomatchhigh-fireair.Seedetailsfollowing.

Step 6: Adjustthebutterflyvalvelinkagetomatchlow-firegastolow-fireair.Seedetailsfollowing.

Step 7: Verifyoperationofburner,appliance,andcontrols.

Use test instruments1. Usecombustion testequipmentandanaccuratemanometerordraft

gaugetocorrectlysettheburnerasrequired.

2. Overfirepressuremustnotexceedtheappliancemanufacturer’srecom-mendations.Theburnermustneverbefiredatanoverfirepressuremorethan0.60inchesw.c.

Whentheoverfirepressureispositive,themaximumburnerfiring rate is reduced.Thefiring rate is also reduced foraltitudeshigherthan2000feetabovesealevel.Seepage3forratinginformation.Ensurethattheoilnozzleselectediscorrecttherequiredfiringrate.

3. Adjusttheburnerfuelandairsettingsusingthefollowingprocedures.Whenadjustmenthasbeencompleted,theCO2(orO2)shouldbewithintherangesinTable6,atbothlowfireandhighfire.

Table 6 Allowable values of CO2 and O2

FuelCO2 O2

Minimum Maximum Maximum Minimum

#2 Fuel Oil 10.5 % 12.5 % 6.6 % 3.9 %

Natural Gas 8.5 % 10.0 % 6.2 % 3.6 %

Propane 9.5 % 11.2 % 6.0 % 3.5 %

8. Adjust the burner using test instruments

ThesettingsgiveninSection6areinitialsettingsonly.You must use test instruments to checkcombustion,andadjusttheburnerasnecessary,following the procedures given in the followingpagesofthismanual.Failuretoproperlyadjusttheburnercanresultinseverepersonalinjury,deathorsubstantialpropertydamage.

Start the burner (firingonoil)

Donotstarttheburnerifthecombustionchambercontainsoiloroilvapor.

1. TurnserviceswitchOFF.

2. Performinspectionsandcheckoutsonpage12.

3. Verifyburnerissetaccordingtopage13.

4. Sliponeendofa3/16-inchI.D.clearplastichoseovertheendofthefuelunitbleedvalve,theotherendintoacontainer.Thenopenbleedvalve.

5. SetburnerfuelselectorswitchtoOIL.

6. Setthermostat(operatingcontrols)tocallforheat.

7. TurnserviceswitchON.

8. Burnermotor,fuelunitandblowershouldturnon.

9. Bleedtheoillineuntiltheplasticlineisfreeofbubbles;thenanother15secondslonger.(Shouldtheprimarycontroltimingcausealockoutdur-ingpurging,restarttheburnerfollowingtheprimarycontroldatasheetinstructions.)

10. Closethebleedvalve.Theburnershouldcyclethroughthesequencegivenintheprimarycontroldatasheet.

11. Shouldcontrol/burnerfailtooperatecorrectly,shutburneroffimmediatelyandcheckburnersettingsandfuelsupplies.

12. Operateburner for15minutesbeforemakingfinaladjustmentsusingtestequipment.

13. Checkforleaksinfuelpiping.

Inspect fuelpipingsystemfor leaks.Repairany leakstoavoidfirehazardfromoilleakageorcombustionproblemsduetoairinfiltrationintooil.

14. Inspecttheflame

• Lookattheflamethroughtheappliancecombustionchamberobserva-tionport,ifavailable.Theflameshouldbewell-definedandshouldnotimpingeonanyappliancesurface.(Ifyoumakeairchangeslater,inspecttheflameagain.)

Do not attempt to confirm combustion simply by inspect-ing the flame visually. You must use combustion test instruments.Failuretoproperlyverify/adjustcombustioncouldallowunsafeoperationoftheburner,resultinginseverepersonalinjury,deathorsubstantialpropertydamage.

15. Insertthecombustionequipmenttestprobeintoaventsampleopeningtosampleflueproducts.

Allinstallationsshouldbecheckedafteronetotwoweeksofoperationtoensuretheappliance/burnerunitsareoperatingcorrectly.


MN702GO1 022120v2 – 21 –


8. Adjust the burner using test instruments (continued)

3. SeeFigure6,page13.Adjustthelow-firedamperscrewuntilthelow-fireCO2isbetween11%and12%.Rotatethescrewclockwisetoincreaseairflow(reducedCO2).Rotatethescrewcounterclockwisetodecreaseairflow(increaseCO2).

4. Smokeatlowfiremustbezerooratrace.Notethattoomuchaircanactuallyincreasesmoke.

Step 3 (firing on oil) Damper actuator end switch positionSeeincludedsupplementMNSQN71forvisualcalloutsandinstructionsonsettingDamperActuator.1. Modulatetheburnerfromlowfiretohighfireandbacktolowfire,pausing

ateachstepforaboutoneminute.2. Iftheswingfromlowfiretohighfireisrough(burnerbangsorrumbles),

orthefireisverysmoky,thedamperactuatorendswitchmaybeinthewrongposition.High-fireoilshouldpull inas theairdamper isabouthalfwaythroughitsswing.

3. Fordifferentapplianceapplications,itissometimesnecessarytohavehigh-fire oil pressureearlier or later thannormal during the swing toachieveasmoother,cleanertransition.

4. If theswing is rough(flamegoesout,bangsor rumbles), therecouldbeairintheoil,orthenozzlemaybedefective.Check,andreplacethenozzleifnecessary.Thenretry.

5. Ifthefireistoolean,theflamecouldliftoffofthehead,causingrumbleorunsteadycombustion.Inthiscase,adjustthemodulatingmotorendswitchtoenergizeearlier.

6. Iftheflameisverysmokey,adjustmenttotheswitchingpointsmayneedtobemade.• Adjustmentsoftheswitchingpointsaredonebymeansofadjustable

cams• Scalesbesidethecamsindicatetheangleoftheswitchingpoint• Assignmentofcamstotheendofauxiliaryswitchesiscolor-coded• Someofthecamfeaturefineadjustmenttheycanbeadjustedwitha

standardscrewdriver• Theothercamscanbeadjustedmanuallyorwith a hook-spanner or

similar tool

7. Restarttheburnerandcheckmodulationagain.Continuewith1through6aboveasneededuntilresultsareacceptable.

TurnofftheburnerwhenStep3iscompletedbeforeproceedingwithsetupforgascombustion,Step4.

Thelinkage between the damper motor arm and the air damper crank is set at the factory, andshouldONLYneedadjustmentifthedampermotororthedamperrodisreplaced.Withtheburnerinhigh-fireposition,thereshouldbeminimalplayintheconnectingrod.DONOTchangethislinkagesetting.

Step 1 (firing on oil) Set combustion head (Dimension “A”)

1. Allowtheburnertooperateapproximately15minutestoensuretheap-plianceisheatedandcombustionissteady.

2. Setthedraftasspecifiedintheappliancemanual.

3. Thecombustionheadadjustingscrewisusedtosetthespacingbetweentheretentionringandthrottlering,regulatinghowmuchairpassesaroundtheretentionring.(SeeFigure5,page13.)Thelargerthevalueofdimen-sionA,thelargertheclearance,sothelargertheairflow.ThesmallerthevalueofdimensionA,thesmallertheairflow.

4. Measurethe%CO2intheapplianceflue.Thevalueshouldbeapproxi-mately12.5%forhighfireoil.IftheCO2ishigherthan12.5%,adjusttheheadadjustingscrew(seeFigure5,page13) toa largerdimensionAtoincreaseairflow.IftheCO2islessthan12.5%,adjustthescrewtoasmallerdimensionAtodecreaseairflow.

5. Reset draft as specified in the appliancemanual, after any airflowadjustment.

6. Checkthesmokevalueintheapplianceflue.Itmustbezerotoatrace.If not, try increasing airflow (reducing theCO2). If increasing airflowincreasessmoke,thecombustionisprobablyonthewrongsideoftheCO2curve.Tocorrect,increasetheairflowuntilthesmokeiseliminated.

7. Whenadjustments are completed, theCO2must be between12.0%and12.5%athighfireoil,withsmokeequaltozerooratrace.Overfiredraftmustbe-.02inchesw.c.,orasspecifiedintheappliancemanual.

Step 2 (firing on oil) Set low-fire damper1. Flipthelow-fireswitchtolowfire.

2. Theburnerfuelunitblockingvalvewillbedeactivated,andtheoilnozzlepressurewilldropto100PSIG.


MN702GO1 022120v2– 22 –


Step 4 (firing on gas) Check gas pilot operation

TheModel702G/Ousesagaspilotforignitionofthegasmainflame.Thegaspilotisignitedbythepilotelectrode.Thebutterflygasvalveisfactorysettoapreliminarysettingof30%openforlowfire,and100%openforhighfire.

1. After completing Steps 1, 2 and 3 on page 19, move the burner fuel selector switch to GAS. Set the low-fire switch to low fire.

2. Makesurethegaslinehasbeencompletelybled.ThenturntheserviceswitchtoON.

3. Thepilotwillusuallylightthefirsttimeoncethepilotgastrainhasbeencompletelypurgedofair.

4. Thepilotflameisapproximately70MBH.Ifthepilotfailstolight,besurethegaslinehasbeenbledproperly.Iftheprimarycontrolisequippedwithapilottestholdswitch,itcanbeusedtoholdthepilot“on”whileadjustingpilotgaspressure.

5. Followtheinstructionsintheprimarycontrolinstructionmanualtocheckflamesignal.Makesuretheflamesignalissteady,andgreaterthantherequiredminimumfortheUVsensor.

6. Check and ensure that the bent ignitor (Figure 11) is approximatelycentered inpilotassembly. Ifnot, loosenelectrode lockingnut, rotateassemblyandtightennut.

7. Tocheckstaticpressureonpilotair,drilla#60holeinthepilotairtube(redcircle,Figure12)anduseamanometerforthereading.Pressuremustbemorethan.45"w.c.

Step 5 (firing on gas) Set main gas pressure regulator

Thebutterflygasvalveisfactorysettoapreliminarysettingof30%openforlowfire,and100%openforhighfire.Thepilotregulatorissetfor3.0inchesw.c.Usemonometerinthepilottestport(Figure12)providedtoconfirmsettings.

1. Leavethelow-fireswitchinlowfire.


Checkalljointswithasoapsudsmixtureorelectronicgas leakdetector to ensure thegas train andallcomponentsaretightandleak-free.Shutdowntheburnerandcorrectanyleakimmediately.Failuretocomplycouldresultinseverepersonalinjury,deathorsubstantialpropertydamage.

2. Withthegaspilotoperatingcorrectly,andtheUVsensorflamesignalaboveminimum required, theprimary controlwill cycle theburner tomaingas.

3. Checktheflamesignalafterthepilothasshutdowntoensurethesignalisstillstrongwithmainflameon.

4. MovetheburnerfuelselectorswitchtoOFF.Theburnerwillshutdown.5. TemporarilyinstalltwoU-tubemanometerconnectionstocheckgaspres-

sures.Installconnectionsattheinletpressuretapofthemainmanualgasvalveandatthedownstreampressuretapofthemanualgasvalvenexttothebutterflyvalve.

6. The gas pressure at the inlet to the gas trainmust never exceed14inchesw.c.,eitherwhentheburnerisofforfiringongas.

7. MovetheburnerfuelselectorswitchtoGAS.Theburnershouldstart.8. Withtheburnerfiringinlowfire,checkthegaspressureatthedownstream

ofthebutterflyvalve.Adjustthemaingaspressureregulatorifnecessaryuntilthegaspressurereads1.0inchw.c.asastartingpressure.

9. Switchthelow-fireswitchtohighfire.CAUTION:Bepreparedtoturntheburneroffimmediatelyif itbeginstopulsateasitattemptstomovetohighfire.

10. Iftheflamepulsates,itisprobablytoorich.Switchthelow-fireswitchtolowfireandreducethegaspressurebyadjustingthemaingaspressureregulator.Thenreturnto9,above.

11. Ifthefireistoolean,itwillappearsmallandcanevenblowoutduringtheswingtohighfire.Ifitblowsout,shutofftheburnerimmediately.Switchthelow-fireswitchtolowfireandstarttheburneragain.Adjustthemaingaspressureregulatortoincreasethegaspressure.Returnto9,above.

Withtheburnerrunninginhigh fire,inspectthebutteflyvalveindicator(Figure13).Theindicatormustbeat90°.IFNOT,turntheburneroff.Loosenthetwohex-headscrewssecuringthevalvelinkagearm.Withthedampermotorlinkagearmpulledup,useascrewdrivertorotatethebutterflyvalveslotuntilitishorizontal.Tightenthetwohexheadscrewswhilestillholdingthedampermotorlinkagearmup.Returntostep9,above.DONOTproceedwithcombustionadjustmentunlessthebutterflyvalvepositionhasbeenverified,andcorrectedifnecessary.

Figure 11 Pilot Spark Gap

Figure 12 Pilot Test Port


MN702GO1 022120v2 – 23 –


12. Withtheburnerrunninginhigh fire,adjustthemaingaspressureregula-tortoachieve:• Naturalgas:9.6%to10.0%CO2.• Propane:10.7%to11.2%CO2.• MeasuretheCOcontent.Itshouldbenogreaterthan100PPM.

HighCOreadingsmayindicatethecombustionisonthewrongsideoftheCO2.curve.YouwillknowthisifadecreaseingaspressurecausesanincreaseinCO2.

Step 6 (firing on gas) Set butterfly gas valve linkage1. Switchthelow-fireholdswitchtolowfire.2. CheckCO2andCO.TheCO2shouldbebetween9.0%and10.0%(natural

gas)orbetween10.0%and11.2%(propane);withCOlessthan100PPM.3. Toadjust the low-fireair(changeCO2),movetheburnerfuelselector

switch toOFF.Adjust the butterfly gas valve linkageas described inthefollowingtochangethelow-firegasflowtotheburnerhead.Donotchangethemaingaspressureregulatorsetting.

4. DO NOT ADJUST THE LOW-FIRE AIR DAMPER SETTING.Thismustbeleftassetforoilfiring.

5. SeeFigure13forlocationoflinkagecomponents.

Figure 13 Butterfly gas valve linkage

Toadjust the linkage, loosensetscrewin theadjustablelinkinsmallincrements.A1/8-inchmovecancauseCO2 tochangeasmuchas1.5%.

• Ifmoregasisneeded(toincreaseCO2),slidelinkageUP.• Iflessgasisneeded(todecreaseCO2,),slidelinkageDOWN.

6. Tightenthesetscrewintheadjustablelink.


7. The butterfly valve indicator must be at 90°.IFNOT,turntheburneroff.Loosen the twohex-headscrewssecuring thevalve linkagearm.Rotatethebutterflyvalveindicatoruntilitisat90°.Disengageactuatormotor.Rotatelinkagetohighfire.Tightenthetwohexheadscrewswhilestillholdingthemotorlinkagearminhighfire.Rotatelinkagetolowfire.Re-engagepin.

8. Tightenthetwohexheadscrewsonthebutterflyvalvelinkagearmboss.9. RestartandrepeatasnecessaryuntilCO2andCOareacceptable.

IF EQUIPPED WITH LOW-HIGH GAS PRESSURE SWITCH, PROCEED TO STEP 6A.

OTHERWISE PROCEED TO STEP 7.

Step 6a (firing on oil and on gas) Verify operation

Perform all of the checkout procedures given in Step 6 of the burner manual. In addition, verify operation of the gas pressure switches as described below.

Verify high gas pressure switch operation ❏ Cycle the burner off with the appliance controls and turn off power to the

appliance/burner.

❏ Attach a manometer to the manifold-side manual gas valve test port.

❏ Turn on power and cycle the burner on with the appliance controls.

❏ Measure the manifold gas pressure with the manometer.

❏ Set the high gas pressure switch to a pressure less than actual manifold pressure. The high gas pressure switch should shut the burner down. Replace the switch if necessary.

❏ Turn off power to the appliance/burner; remove the manometer and replace the plug in the gas valve test port. Reset switch.

Verify low gas pressure switch operation ❏ Cycle the burner off with the appliance controls and turn off power to the

appliance/burner.

❏ Close the main manual gas valve.

❏ Cycle the burner on.

❏ The low gas pressure switch should shut the burner down. Replace the switch if necessary.

❏ Turn off power to the appliance/burner.

❏ Open the main manual gas valve.

❏ Reset low gas pressure switch.

Bleed ValveIndicatior(red needle) Hex Nut

Location

SetScrew


MN702GO1 022120v2– 24 –


Step 7 (firing on oil and on gas)

Verify operation

Burner/appliance/controls operation ❏ Testoperatingandlimitcontrolsonapplianceasspecifiedinapplianceinstructions.

❏ Checkoperationoftheprimarycontrolbyforcinglockouttooccur.Forprimarycontrolsthatenterlatch-upaftermultiplelockouts,forcelatch-uptooccuraswell.Resetprimarycontrolpercontroldatasheetinstructionsaftereachtest.

❏ Startandstoptheburnerseveraltimes,allowingtheprimarycontroltosequencethroughnormaloperation.Verifycorrectoperationofburnerandprimarycontrolthroughoutonbothoilandgas.

❏ Confirmand/oradjustoverfirecombustionpressureforoilandgasopera-tion.Refertoboiler/furnacemanufacturer’srecommendations.

Verify vent system operation ❏ Verifyventisoperatingcorrectlyandflueproductsareproperlyexhaustedfrombuilding.Ifthebuildingcontainsanyexhaustfansorconditionsthatcouldaffect ventperformance,checkburner/appliance/ventoperationwithexhaustfans(orotherconditions)operating.


Combustion/ventilation air ❏ Verifycombustion/ventilationairopeningsarenot,andwillnotbeob-structed.

❏ Verifyairopeninglouversarefullyopen. ❏ Iflouversaremotor-operated,verifymotorandendswitchareinterlockedwithappliance/burnerwiringtopreventoperationoftheburneriftheairlouversarenotfullyopened.

Prepare burner for normal operation ❏ Cycleburneroffwithappliancecontrols. ❏ Turnoffpowertotheappliance. ❏ Sealtheappliancefluetestopening. ❏ Verifyall componentsandwiresare inplaceandburner is ready foroperation.

❏ Restorepowertotheappliance.

Train the user ❏ Traintheusertooperatetheburnerandapplianceundernormalcondi-tions.

❏ Explaintheproceduretoshutdowntheburner/appliancewhenrequired. ❏ Reviewthebackcoverofthismanual(andtheappliancemanual)withtheuser.

❏ Verifytheuserisawareofallproceduresspecifiedinthemanuals. ❏ Verifythattheuserwillnotstoreorusecombustibleliquidsormaterialsorcontaminantsinthevicinityoftheburner/appliance.


MN702GO1 022120v2 – 25 –


Motor maintenance• Refertomotormanufacturer’sinstructionsforoilingthemotorasneeded.

Checking ignitor Nevertestanignitorbyplacingascrewdriver(orothermetallicobject) across the high voltage clips.This could cause ignitordamageorseverepersonalinjury.

1. Checking45000ignitorsonly:• Disconnectelectricalpowertoburner.• Opentheburneraccesscoverandremoveignitorwiresfromtheelec-

trodes.Lightlyclampeachignitorwiretotheburnerhousing,withthewireendspointedtowardoneanother,spacedapartbya½"to¾"gap.

• Energizeignitorandcheckforsparkarcingatthehighvoltageterminals.Ifsparkjumpsthegap,ignitorisgood.

Thermal fuse1. Whentheburnerisinahigh-overfiredraftcondition,andnotproperly

adjusted,itispossiblethattheflamecouldflashbackinsidetheairtube.Ifthisoccurs,thethermalfusewillopeninlessthantwoseconds.Thefusemustbereplaced.(Theburnerissuppliedwithsparefuses.)

9. Maintenance and service procedures

When servicing the burner . . .• DISCONNECTELECTRICALSUPPLYandallotherelectricalconnec-

tionstoburnerbeforeattemptingtoservicetoavoidelectricalshockorpossibleinjuryfrommovingparts.

• CLOSEallmanualgasandoilvalvesbeforedisconnectinganyportionoffuellinesandbeforecleaningorremovinganypartsfromtheburnerorrelatedequipment.

• Burnerandappliancecomponentscanbeextremelyhot.Allowallpartstocoolbeforeattemptingtohandleorservicetoavoidpotentialofsevereburns.

Turnoffpowertoappliancewhenservicingburner.Afterservic-ing, always operate burner/appliance to verify all componentsarefunctioningcorrectlyandthattheburnerisproperlyadjusted.Failuretocomplycouldresultinseverepersonalinjury,deathorsubstantialpropertydamage.

General maintenance

Cleaning blower wheel1. Theblowerwheelaccumulatesdustanddebrisfromnormaloperation.You

willneedtocleanthewheelbladesperiodicallytopreventreductioninairflow.Inspecttheblowerwheelregularlybyopeningthehousingcover.

2. Tocleanblades,whennecessary,removetheboltssecuringthemotortotheblowerhousing.a. Slidethemotoroutandrotatetoremoveandaccessblowerwheel.b. Useabrushandvacuumtocleaneachbladeandtheblowerhousing

interior.c. Installmotor/wheelinblowerhousingandsecurewiththetwobolts.d. Pushwireslackbackintojunctionbox.

Replacing blower motor or wheel1. Ifeithertheblowerwheelormotormustbereplaced,removetheboltssecur-

ingthemotortohousing.2. Disconnectthemotorwiresintheburnerpanel.3. LoosentheAllenscrewsecuringtheblowertothemotorshaftandremove

thewheel.4. Whenassemblingthereplacementassembly,slidethewheelontothemotor

shaftandusefeelergaugestosetspacebetweentheblowerwheelandthemotorface.Thisspacemustbe3/16inch.

5. Installthemotor/wheelassemblyinthehousing,wirethemotorleadsandsecurethemotorwiththetwobolts.


MN702GO1 022120v2– 26 –


9. Maintenance and service procedures (continued)

Annual start-up and service Thisburnermustbestartedandservicedatleastannuallybyaqualifiedservicetechnician.Failuretoproperlymaintainandservicetheburnercouldresultinseverepersonalinjury,deathorsubstantialpropertydamage.

❏ Discussburner/applianceoperationwithusertodetermineanyproblemsthatmayhaveoccurredduringthepreviousseasonandtoverifyuserisawareofproperoperationandcareoftheburner/appliance.

❏ Reviewproperoperationoftheappliance/burnerunitwiththeuser. ❏ Turnoffpowertoappliance. ❏ Removecombustionheadassemblytocleanandadjustifnecessary. ❏ If the inside surfaceof the air tubeand/or retention ring need to becleaned,cleanthemwithavacuumcleanerwithbrushattachmentwhilethecombustionheadassemblyisoutoftheburner.

❏ Inspectandadjusttheignitionelectrodesandinsulatorsperinstructionsonpage10ofthismanual.Replaceifproperspacingcannotbeachievedorifcomponentsaredamaged.

❏ Closethehousingcoverplateandsecureinplace. ❏ Inspectthefuellineoilfilter.Replaceifnecessary.

Oillinefilters—Useanon-bypassingfiltertopreventnozzlepluggingcausedbypooroilfiltration.Non-bypassingfilterspreventsmallforeignparticlesfrombypassingthefilter,acommonproblemwithfiberelement typefilters.Anotherproblemofsomefiltersisthefiberfromfilterelementtearscanbreakawayandplugthenozzleorfuelunit.

❏ Performthecompletecheckoutproceduresofpages16,includingsysteminspectionandchecks.

❏ Informtheuserofanyproblemsfound.


MN702GO1 022120v2 – 27 –


9. Maintenance and service procedures (continued)

Installation/service certificate

Installation data

Burner model Serial number Measured gas firing rate, Btuh

Oil nozzle size & pattern: Manifold gas pressure, IWC (High fire/Low fire)

Inlet gas pressure, IWC

CO2% Oil Low Fire: ______

Oil High Fire: ______

Gas Low Fire: ______

Gas High Fire: ______

Oil Low Fire: ______

Oil High Fire: ______

Gas Low Fire: ______

Gas High Fire: ______

O2% Nozzle pressure:

• High fire: ______ PSIG • Low fire: ______ PSIG

Fuel unit vacuum (“Hg)

• High fire: ______ InHg • Low fire: ______ InHg

Were limit controls tested?

Comments about installation/start-up:

Installer’s name: Company na :enohP:sserdda ynapmoC:em

Service history

Date Technician Company/address Describe work performed


MN702GO1 022120v2– 28 –


10. Repair parts — Burner housing and componentsForpartsnotshownorlisted,contactfactoryand/orcheckseparatedocumentationsuppliedwithappliance/burnerunit.

ITEM PART NO. DESCRIPTION

702G

/O

1 27706S Motor: 1/2 hp, 115/230V, 60HZ, 1 Phase, 3450 rpm •

2 98507S Electorde Set of 2, Approx. 9 1/4" OAL •

3 55772S Ignition wire (One wire in Service Pack) (2 Req'd) •

4 51562S 14" Tube with pressurized flange 1" main gas inlet; external pilot, 4" UTL •

5 98522S Air Flow Switch 120 Volt •

6 51573S Gasket •

7 51317S Damper Motor - SQN71 •

8

40857S Instant Oil Valve 32Z0071TSCV •

41004S Instant Oil Valve 32Z0078TSCV 3 Way •

61150KITS Oil Valve Kit (44560, 29678, 44461, 29728, 44545) •

923556S Suntec, 2 Stage, B2TA-8851 •

74476S Suntec, 2 Stage, NYC, B2TA-8851 100/300PSI •

10

51451BS 14" Combustion Head Assembly (includes thermal fuse and electrode wire) •

51575BS 14" Combustion Head Assembly for 702GAS

51459S Butterfly Valve and Crank Arm-Siemens VKG-10, 1"NPT •

11

4180002FS Gas Ignitor •

45000S Oil Ignitor •

45000S0LC Ignitor on Baseplate •

ITEM PART NO. DESCRIPTION

702G

/O

12 98857KITS Blower Wheel, Coupling, Augmentor, 6 1/2" OD x 3 3/4" W, 1/2" Bore •

13 98856S Coupling, 1/2" ID x 5/16" ID x 6 13/16" L, B Pump •

14 56747S Retention Ring Assy 702CRD •

15 75358KITS Oil Line Kit For 702G/O •

16 35824S Motor Contactor 20 AMP R4242B1005 (not shown) •

1751476S Shutter Drive Link Kit 9" •

51542S Damper Motor Linkage Kit 11" •

1834215S Thermal fuse •

99716S Toggle Switch (Not Shown) •

19

35311S C7027A1023 UV Scanner •

97656S Q7800B1003 Sub Base •

99766S RM7897C1000 Programming Control •

97662S R7849A1023 Amplifier •

97716S ST7800A1054 Timing Card •

EMX51UVS EMX51UV KIT includes all of the above •

20 23382S Pedestal (Not Shown) •

21 6702KITS Hardware Kit (Yoke 54916, C/H adj screw 47167, oil line elbow 29694) •

2251202S Pilot assembly with ignitor and gasket •

51376S Gas/Oil Pilot Ignitor •


MN702GO1 022120v2 – 29 –


10. Repair parts — Burner housing and components (continued)

Forpartsnotshownorlisted,contactfactoryand/orcheckseparatedocumentationsuppliedwithappliance/burnerunit.

16*19*

19

11

1

11

13

15

15

9

17

17

4

8

14

21

7

12

5

22236

18

2

3

10


MN702GO1 022120v2– 30 –


Forpartsnotshownorlisted,contactfactoryand/orcheckseparatedocumentationsuppliedwithappliance/burnerunit.

10. Repair parts (continued)

16 35824S Motor Contactor 20 AMP R4242B1005 (not shown)

19 EMX51UVS EMX51UV KIT includes all of the below

35311S C7027A1023 UV Scanner

97656S Q7800B1003 Sub Base

99766S RM7897C1000 Programming Control

97662S R7849A1023 Amplifier

97716S ST7800A1054 Timing Card

31 51512 Relay-SPDT


MN702GO1 022120v2 – 31 –


11. Dimensions

Figure 10 Dimensional data, burner only

Figure 10A Dimensional data, burner with gas train


MN702GO1 062719– 32 –


User care and maintenance

Referonly to the informationonthispage,intendedforyouruse.Theremainderof thismanual isintended only for your servicetechnician.Failuretocomplycouldresult in severe personal injury,deathorsubstantialpropertydam-age.

Forotherthanroutinemaintenance,contacta qualified service company.Perform thefollowingasneeded.

• Keeptheareaaroundtheburnerclearand free fromcombustible vapors andliquids.

• Donotobstructtheflowofcombustionandventilatingair.

• Mostmotorscurrentlyusedonresidentialtypeburnersusepermanently-lubricatedbearings,anddonotrequirefieldlubri-cation.Read the labelon themotor todetermine oiling needs, if any.Do notover-lubricate.Thiscancauseasmuchtroubleasnotlubricatingatall.

Neverattempttousegasolineasafuelforthisburner,asitismorecombustibleandcouldresultinaseriousexplosion.Neverattempttoburnrefuseoruseanyfuelotherthan#1or#2heatingoil(ASTMD396).

702G/O Burner

Should overheating occur:

(1) Shutoffbothfuelsuppliestotheburner.

(2) DONOTshutoffthecontrolswitchtothecirculatororblower.

(3) Contact your oil dealer or servicetechnicianandthefiredepartment(ifneeded).

Theburnermustbecleaned, testedandadjusted annually by a qualified burnerservicetechnician.

6.0 to 11.2 gph oil 840 to 1600 mbh gas...proximately 70,000 btuh. pilot gas is introduced and...

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