IBC SFC-125 Quick start guide

120-244E2 |1
Note
IfconvertingfromPropanetoNaturalGas,ordertheNaturalGasConversionPartsKit(IBCPart#P-
807)fromyourauthorizedIBCDistributor.
UsethePropaneGasconversionpartskitifthefuelsourceatthesiteusesPropaneandtheappliancehasbeen
setuptooperatewithNaturalGas.Checktheratingplateontheboiler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boilerafterthe
conversioniscompleted.
Warning
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boiler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:
  
Part# Description Quantity
180-229 LPorifice#370 1
150-175 OrificeO-ring19x2 1
080-305 Ratingplateoverlay 1
080-107 Gasvalveconversionlabel 1
080-244 InstallerIdentificationlabel 1
SFC125/SFB125-FuelConversionto
Propane-P-806

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propane,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.
Fuel HighFirewithfrontcoveropen LowFirewithfrontcover
open
Max.CO2value 11.5% ActualValueatHighFireMinus
-0.3%
Min.CO2value 9.8% 9.5%
Table 1 - Combustion test target ranges - CO2 / Maximum CO
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SFC 125 / SFB 125 - Fuel Conversion to Propane - P-806 |3
FuelConversionInstructions
Youmustbeaqualifiedtechniciantoperformafuelconversion.
ModelNumber OrificeSize
SFC16-125/SFB16-125 370
Table 2 - Propane Orifice Chart
Toperformafuelconversion:
1. Turnoffthegassupplyatthemanualgasvalve.
2. Disconnecttheelectricalpower.
3. Disconnectthenutatthegasvalveoutlet(topofthegasvalve),andremovetheO-ringandorifice.
4. 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.
5. Restorethegassupplybyopeningthegascontrolvalve.
6. Testforleaksbyusinganapprovedleakdetectionsolutiononalljoints.
7. Powerontheboiler/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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
SFC16-125/SFB16-125 125MBH
Table 3 Rated input of a converted boiler
Normalignitionsystemsequenceofoperation:
Theboilercontrol,uponacallforheatorDHW,turnsonthecombustionfanfora5-second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manualgas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.
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SFC 125 / SFB 125 - Fuel Conversion to Propane - P-806 |5
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”.
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waterheatertolowfirebypressingtheServicebuttonandMinusbuttonatthesametime.
Thewaterheater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manualgas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manualgas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.
Nextyoumustfillintheinformationandaffixtheincludedfuelconversionlabelstotheboilerasindicatedafter
theconversioniscompleted.
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boilerasindicatedbelow.

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