IBC SFC-99 Manuel utilisateur

120-243E1 |1

Note

IfconvertingfromNaturalGastoPropane,orderthePropaneConversionPartsKit(IBCPart#P-

804)fromyourauthorizedIBCDistributor.

UsetheNaturalGasconversionpartskitifthefuelsourceatthesiteusesNaturalGasandtheappliancehas

beensetuptooperatewithPropane.Checktheratingplateontheappliance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

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 - SFC 99, SFB 99

Part # Description Quantity

180-216 LPorifice#392 1

150-175 OrificeO-ring19x2 1

080-303 Ratingplateoverlay 1

080-107 Gasvalveconversionlabel 1

080-245 InstallerIdentificationlabel 1

SFC 99 / SFB 99 - Fuel Conversion to

Natural Gas - P-805

Combustion Test Target Ranges

Figure: 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

SFC 99 / SFB 99 - Fuel Conversion to Natural Gas - P-805 |3

Fuel Conversion Instructions

Thefollowingproceduremustbecarriedoutbyaqualifiedtechnician.

Model Number Orifice Size

SFC15-99/SFB15-99 392

Table 2 Natural Gas Orifice Chart

Alternative Natural Gas Orifices - Calorific

values 750-900 BTU/FT3

Model Number Orifice Size

SFC15-99/SFB15-99 426

Table 3 Natural Gas 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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15-99/SFB15-99 99MBH

Table 4 Rated input of a converted appliance

Normalignitionsystemsequenceofoperation:

Theappliance's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boiler’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.

SFC 99 / SFB 99 - Fuel Conversion to Natural Gas - P-805 |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. Clockthegasmeter(seeinstructionsClocking the Meter (for Natural Gas only) on page 6)toconfirm

fullmaximumratingplateinput.

a. Withacombustionanalyzerprobeinthefluegastestport,checkthemeasuredresultsagainst

Table 1 -HighFire.

b. Iftheresultsareoutsidethepermittedrange,checktheinletpressure,andconfirmthatthecorrect

orificeisinstalled.

6. SwitchtheappliancetolowfirebypressingtheServicebuttonandMinusbutton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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appliance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onthelastpage.

Clocking the Meter (for Natural Gas only)

1. Turnoffallotherappliancesandpilots.

2. Turnontheboilerandsettheboilertohighfire.

3. Ensuretheboilerhasalargeloadtoheat,sothattheboiler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.

SFC 99 / SFB 99 - Fuel Conversion to Natural Gas - P-805 |7

Where to Place Conversion Labels on the Boiler



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