Siemens LMV5 Series Technical Instructions

TechnicalInstructions  LMVSeries
DocumentNo.LV5‐1000
Section6 Page8 SCCInc.
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NOTE:Bothsensorsarerequiredtodoaboilerefficiencycalculation.Theboilerefficiency
calculationisnotrequiredforO
2
trimoperation.Ifsensorsareactivatedbutnotreadingcorrectly
ornotwiredcorrectly,theO
2
trimwillnotactivate.Burnerinlettemperaturemustbereadto
performatemperature‐compensatedstartupontheLMV52.440.
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4. Settheappropriateactuatorsto“airinfluen”(airinfluenced).Thesearetypicallyonlytheactuators
/VSDthatwilldirectlyinfluencetheburnerairrate.Themenupathfortheseparametersis:
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 Params&Display>RatioControl>GasSettings
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Typically,onlytheairactuatorandtheVSD(ifused)aresettoairinfluenced.Ifused,theFGR
actuatorisusuallynotsettoair
influenced.
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5. SettheoperatingmodeoftheO
2
systemto“mandeact”(manuallydeactivated).Thisisnecessary
fortheO
2
systemcurvestobecommissioned.Themenupathforthisparameteris:
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Params&Display>O2Contr/Alarm>GasSettings>OptgMode=mandeact
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6. Setthecurvepointatwhichthelowfiredelaytimewillbemeasured.ThisistypicallysettoPoint2,
unlessoversizedexhauststackswithhighturndownburnersareencountered,whichmay
makegas
velocityinthestacktoolowatlowfire.Fortheseapplications,settingthisparametertoahigher
pointthanPoint2willincreasethegasvelocitypasttheO
2
sensorandyieldamoreresponsiveO
2
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reading.Thiscanbesetthroughthefollowingmenupath:
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Params&Display>O2Contr/Alarm>GasSettings>ControlParam>LowfireAdaptPtNo
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7. SettheloadvalueatwhichtheO
2
trimwilldisengage.Typi cally,thisissettotheloadvaluefor
Point2ontheFuel‐AirRatioControlCurve.TheexceptiontothisisifparameterLowfireAdaptPtNo
issettoapointotherthanPoint2.Ifthisis thecase,setthisfortheloadvaluethatcorrespondsto
thepointsetbyLowfireAdaptPtNo.Thiscanbesetthroughthefollowingmenupath:
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Params&Display>O2Contr/Alarm>GasSettings>ControlParam>O2CtrlThreshold
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8. Setthedesir
edtypeofpre‐control.FormostnaturalgasburnerswherethegapbetweenO
2
curves
islargeenoughthattheLambdaFactorcanbelearned(seeO
2
ControlandO
2
AlarmCurvesinFigure
6‐2),thisshouldbesetto"likePair".The"liketheory"settingistypicallyusedforoilburner s,and
"LambdaFact1"shouldonlybeusedasalastresort.Themenupathforsettingthetypeofpre‐
controlis:
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Params&Display>O2Contr/Alarm>GasSettings>ControlParam>TypeAirChange
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Siemens LMV5 Series Specifications

General

Brand	Siemens
Model	LMV5 Series
Category	Control Systems
Language	English