Siemens LMV52.240B1 - O 2 Trim Configuration (Parameterization) before Commissioning

LMVSeriesTechnicalInstructions 
DocumentNo.LV5‐1000
SCCInc. Page7 Section6

TheO
2
RatioControlCurvereflectsthe%O
2
thatresultedfromsettingtheFuel‐AirRatioControlCurve.
TheO
2
ControlCurveisthetargetfortheO
2
trimsystemwhenitisactivated.Whentheburneris
transitionedfromtheO
2
RatioControlCurvetotheO
2
ControlCurvebyincreasingtheStandardized
Value,theLambdaFactorwillbelearnedandrecordedatthatspecificpoint.Alargergapbetweenthe
O
2
RatioControlCurveandtheO
2
ControlCurvewillgivetheLMV52thebestopportunitytolearnthe
LambdaFactoroftheburner,andthusyieldthebestpre‐controlwhentheburnerismodulating.Agap
of1%O
2
ormoreisideal,anditistypicallyachievableonnozzlemixingburnerswithnoorlow
percentagesofFGR.A1%gapistypicallynotachievableonpremixmeshburnersoronnozzlemixing
burnersthatuseahighpercentageofFGR.Thisgapalsosetstheavailablequantityof"lean"trimforan
LMV52.240,andthatiswhytheminimumrecomm
endedgapforanLMV52.240is1%.TheLMV52.440
usesadifferentO
2
trimalgorithmforpremix,meshandhighpercentageFGRburnersandcandealwith
aminimumgapof0.5%.


O
2
TrimConfiguration(Parameterization)BeforeCommissioning

TheprocedurebelowassumesanLMV52withdefaultparametersfortheO2Contr/Alarmmenuandthe
O2Modulemenu.IftheLMV52ismountedtoaburner/boiler,theburner/boilerOEMmayhave
alreadychangedtheparametersfromthedefaultsettingandparameterizedtheLMV52forthe
application.ThisprocedurealsoassumesthatallO
2
trimcomponentsareinstalledandwiredcorrectly,
andthattheO
2
trimwillbecommissionedonnaturalgas.

Section3givesadetailedexplanationofalloftheparametersintheLMV52aswellashighlightsw hich
parametersmust beset(marked witha doubleasterisk **)andwhich parametersarefrequentlyused 
(shaded).

Thisproceduregivesageneralguidelineofwhatparametersneedtobesetonbothatraditionalnozzle
mixingburnerwithlittle tonoFGR,  andalsofor lowandultra‐low NOxburn
ersthat arepre‐mixmesh 
type or high percentage FGR.Every burner is different, so it is likely that every burner will  need a
somewhatuniqueparametersettoruncorrectly.

1. LoginattheOEMpasswordlevel.Fromthefactory,theOEMpasswordforth
eLMV5is"START".

2. Ifnotdonesoalready,activatetheO
2
sensorusingthefollowingmenupath:

Params&Display>O2Module>Configuration>O2Sensor=QGO20

3. Ifbeingused,configuretheappropriatetemperaturesensorsforblowerinletairtemperatureand
stacktemperature.Thisisdonethroughthefollowingmenupath:

Params&Display>O2Module>Configuration>SupAirTempSe
ns
Params&Display>O2Module>Configuration>FlueGasTempSens

ParameterSupAirTempSensactivatesandconfigurestheblowerinletairtemperaturesensor.
ParameterFlueGasTempSensactivatesandconfiguresthestacktemperaturesensor.Optionsare
Ni1000orPt10002‐wiresensorsforbothinputs.
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