IBC EX 700

Caution
FailuretopositiontheO-ringasindicatedwillresultinagasleak,andaffectburneroperation.
8. Re-assembleinthereverseorderofstepsprovided.
9. Checkforgasleaks.
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
EX700 700MBH
Table 1 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20-secondpre-purge,thenenergizesthe
sparkelectrodeandgasvalvefora4-secondtrialforignition.
Iftheburnerdoesnotlight,theprocessisrepeateduntiltheburnerlightsandflameisdetected.After3trialsforignition,the
boilerlocksoutandwillneedtobemanuallyresetbyclearingtheerroronthetouchscreencontroller(Diagnostics>
AdvancedDiagnostics>ClearErrors).Theboilerautomaticallyresetsafter60minutes,ifnoactionistaken.
Combustion test target ranges
TheLowFire(zero-offset)valveadjustmentscrewonthegasvalvehasbeenfactoryset.See inFigure 1 .
TheHighFire(gas-air)ratioadjustmentscrewonthegasvalvehasalsobeenfactoryset.See inFigure 1 .Itwillhave
tobeadjustedtoattainoptimumcombustionresultswheneverfuelconversionisundertaken;however,nomixture
adjustmentshallbeperformedunlessdonebyaqualifiedtechnicianusingproperlyfunctioningandcalibratedcombustion
analyzingequipment.
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