IBC SFC-199 - Water Heater Installation Guidelines; Adjustable Temperature Setting

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-199
125MBH(onaheavyload,only
DHWprovidesfullinputof199
BTUs)
Table 3 - 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smallflatscrewdriver(1/8"or3mm),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demandbyturningupallthethermostatsorcreatealarge
DHWdemandfortheappliancetoheat.
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
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