IBC SFT-199 User manual

120-241E1 |1
Note
Ifconvertingfromnaturalgastopropane,orderthepropaneconversionpartskit(IBCPart#P-802)
fromyourauthorizedIBCdistributor.
Usethenaturalgasconversionpartskitifthefuelsourceatthesiteusesnaturalgasandthemodulating
tanklesswaterheaterhasbeensetuptooperatewithpropane.Checktheratingplateonthetanklesswater
heatertoseewhichfuelsourcetheparticularappliancehasbeensetupwith.
Usingthisconversionkit,aqualifiedtechnicianwillneedto:
1. Performafuelconversion.
2. Performacombustiontest.
3. Fillintheinformationrequiredonthefuelconversionlabels,andaffixthemtotheapplianceafterthe
conversioniscompleted.
Warning
Disconnect power supply before any wiring/service is performed. Failure to do so could
result in damage to appliance and/or electric shock.This conversion kit shall be installed by
a qualified service agency in accordance with the manufacturer’s instructions and all
applicable codes and requirements of the authority having jurisdiction. If the information in
these instructions is not followed exactly, a fire, an explosion or production of carbon
monoxide may result causing property damage, personal injury or loss of life.
The qualified service agency is responsible for the proper installation of this kit. The
installation is not proper and complete until the operation of the converted appliance is
checked as specified in the manufacturer’s instructions supplied with the kit.
Theappliancewillautomaticallyde-ratethemaximuminputatarateofapproximately2%per1,000’above
4,500’.Thegasvalve'szero-governorwillensurethatthegas-airmixtureisnotaffectedataltitude.
Includedwiththeconversionkit:
Fuel Conversion Kit, LP to NG - Superflow SFT 199
Part # Description Quantity
180-173 NGorifice#660 1
150-175 OrificeO-ring19x2 1
080-224 Ratingplateoverlay 1
080-107 Gasvalveconversionlabel 1
080-245 InstallerIdentificationlabel 1
SFT 199 - Fuel Conversion to Natural Gas
(LP to NG) - P-803

Combustion Test Target Ranges
Figure1Gas valve and fan
TheLowFire(zero-offset)valveadjustmentcaponthegasvalvehasbeenfactoryset.Donotadjustthisscrewin
thefieldunlessindicatedintheseinstructions.
Afterconvertingtheappliancetonaturalgas,acombustion(CO2)readingmustbetakenbyaqualifiedtechnician
usingproperlyfunctioningandcalibratedcombustionanalyzingequipmentandtheresultscomparedtothevalues
inTable1.
Natural Gas High Fire with front cover open Low Fire with front cover open
Max.CO2value 10.1% ActualValueatHighFire
Min.CO2value 9.1% 9.1%
Table 1 - CO2 values at High and Low Fire
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SFT 199 - Fuel Conversion to Natural Gas (LPto NG)- P-803 |3
Fuel Conversion Instructions
Thefollowingproceduremustbecarriedoutbyaqualifiedtechnician.
Model Number Orifice Size
SFT28-199 660
Table 2 Natural Gas Orifice Chart
Alternate Natural Gas Orifices - Calorific values
750-900 BTU/FT3
Model Number Orifice Size
SFT28-199 725
Table 3 Alternative Natural Gas Orifice - calorific values between 750-900 BTU/FT3
To perform a fuel conversion:
1. Turnoffthegassupplyatthegasshut-offvalve.
2. Disconnecttheelectricalpower.
3. Disconnectthegasvalveharnessplugfromthegasvalve.
4. Disconnectthenutatthegasvalveoutlet(topofthegasvalve),andremovetheO-ringandorifice.
5. InsertthecorrectorificeintotheO-ring,andre-installintothenutatthegasvalveoutlet(topofthegas
valve),andthentightenthenut.
6. Restorethegassupplybyopeningthegascontrolvalve.
7. Testforleaksbyusinganapprovedleakdetectionsolutiononalljoints.
8. Poweronthewaterheaterappliance.
Now,carefullyfollowtheproceduresonCombustionTestingandAdjustment.

Combustion Testing and Adjustment
Danger
Acombustiontestchecksthatthegasvalveisoperatingproperlyinthefield.Toperformacombustion
test,youmustbeaqualified,trainedandlicensedgasfitter.
MakingadjustmentstotheIBCgasvalvewithoutaproperlycalibratedgascombustionanalyzerandby
peoplewhoarenottrainedandexperiencedinitsuseisforbidden.Failuretouseananalyzercan
resultinanimmediatehazard.
Model Number High Fire Input
SFT28-199 199MBH
Table 4 - Rated input of a converted appliance
Normalignitionsystemsequenceofoperation:
Theappliance'scontrol,uponacallforDHW,turnsonthecombustionfanforashortpre-purge,thenenergizes
thesparkelectrodeandgasvalvefora5-secondtrialforignition.
Iftheburnerdoesnotlight,theprocessisrepeateduntiltheburnerlightsandflameisdetected.After4
unsuccessfultrialsforignition,theappliancelocksoutandwillneedtobemanuallyresetbypressingtheReturn
Arrow button.
To perform a combustion test and adjustment:
1. Turnofftheappliance’sgasshut-offvalve.
2. WithaTorx15screwdriver,opentheinletgassupplypressuretestportby
turningitsscrew1fullturncounterclockwise.
3. Attachamanometertotheinletpressuretestportandturnongasto
appliance.
Staticmanometerreadingshouldbeideally11"w.c.forpropane.
Minimumandmaximumstaticpressuremustbebetween5"and14"
w.c.Monitorpressurethroughoutthecommissioning(start-up)
procedure.Pressuremaydroopupto1"w.c.athighfire.
4. Tosettheappliancetohighfiremanually,createalargeDHWdemandfortheappliancetoheat.
Allowtheappliancetoignite/runagainstalargeload,tomaintainhighfire.Tosetthehigh-firemanually,
pressandholdtheServiceiconfortwoseconds.ThenwhileholdingtheServiceiconpressthePlusbutton
twice.“H”willshowintheservicedisplayastheapplianceentershighfire.
Note:AllowtheappliancetooperateatHighFirefor3minutestostabilize.(Theapplianceoperatesin
manualmodefor10minutesthenswitchbacktothenormaloperatingmode.Toextendmanualmode
operation,presstheService andPlusbuttonstogethertwicewhiletheapplianceisoperatinginmanual
modetoresetthetimerfor10moreminutes.)Donotmakeadjustmentsiftheservicedisplayshowsan“h”.
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SFT 199 - Fuel Conversion to Natural Gas (LPto NG)- P-803 |5
5. a. Whileinmanualhighfire,toconfirmfullmaximumratingplateinput(estimated):
i. Press ServicebuttonfortwosecondstoentertheInformationmenu.
ii. Press Plusbuttonrepeatedlyuntiltherightwindowindicates"F".Theinputisdisplayed
intheMainwindow.
iii. Press FlamebuttontoreturntotheServicemenu.
b. Withacombustionanalyzerprobeinthefluegastestport,checkthemeasuredresultsagainst
Table 1 -HighFire.
c. Iftheresultsareoutsidethepermittedrange,checktheinletpressure,andconfirmthatthecorrect
orificeandventuriareinstalled.
6. SwitchtheappliancetolowfirebypressingtheServicebuttonandMinusbuttonsatthesametime.The
appliancewilldroptolowfire.“L”willshowintheservicedisplay.
a. ComparethereadingswithTable 1 -LowFire.Ifadjustmentisnecessary,removetheLowFire
AdjustmentcaptorevealaTorxheadscrew.
b. Maketinyadjustments,typicallylessthan1/8thofaturnatatime.Turnthescrewclockwiseto
increaseCO2andcounter-clockwisetoreduceCO2.Ifthetargetcannotbemet,evenafterahalf
turn,contactthefactory.
c. Whenfinished,replacetheLowFirecap,andleavethemanualmodebypressing+AND-
simultaneously.
7. Switchofftheappliancebypressingthespaceabovethedot.
8. Turnoffthegasattheappliance'sgasshut-offvalve.
9. Removethefluegasanalyzerfromthetestport,andreinstallthetestportcap.
10. Removethegaspressuremanometerfromthegasvalve,andfullyclosethetestport.
11. Turnonthegasattheappliance’sgasshut-offvalve.
12. Ensuretherearenogasleaksbeforereinstallingthefrontcover.
13. Turnontheappliancebypressingthespaceabovethedot.
Completing and Affixing the Conversion Labels
1. Fillintheconversionlabels(includedinthekit)associatedwiththenewfueltype.
2. Placetheconversionlabelsontotheapplianceatthepositionsindicatedonthelastpage.

Clocking the Meter (for Natural Gas only)
1. Turnoffallotherappliancesandpilots.
2. Turnontheapplianceandsettheappliancetohighfire.
3. Ensuretheappliancehasalargeloadtoheat,sothattheappliancewillnotshutoff.
4. WithaStop-Watch,recordthenumberofsecondsforthesmallestdialtomake1fullrevolution.
5. CFH=(3600xDialSize)/Seconds
6. CFHx1000(checklocalBtucontent)=InputBtu’s.
Note
For2PSImetersmultiplyCFHx1.097
ForMetricmetersmultiplyCFHx35.3
For2PSImetricmetersmultiplyCFHx1.097x35.3
ForAltitudeabove4,500’deduct2%per1,000’ofaltitudefromtheInputBtu’s.
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SFT 199 - Fuel Conversion to Natural Gas (LPto NG)- P-803 |7
Where to Place Conversion Labels on the Tankless Water
Heater
