Siemens LMV51.140C1 - Page 206

TechnicalInstructions  LMVSeries
DocumentNo.LV5‐1000
Section6 Page34SCCInc.
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 Ifacombustionairtemperaturesensorisinstalledandactivated,theairtemperaturewillbe
recordedwhenthelastpointisenteredintotheO
2
ControlCurve.Thistemperatureisstoredunder
thefollowingmenupath:

Params&Display>O2Contr/Alarm>Gas/OilSettings>Startmode>Adjust.TempO2
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Thisisthetemperaturethatwillbecomparedagainstthecurrentairtemperaturetoperform
temperaturecompensatedlight‐offifparameterStartModeissetto“IgnLoadTC”or“IgnPtWithTC”
(LMV52.440only).
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 WhenterminalX5‐03.2isproperly configured(seeSection3‐Parameters),itcanbeenergizedto
causeadeactivationoftheO
2
trim.Whenthisisdone,theLMV52willoperateontheO
2
Ratio
ControlCurve.TheO
2
richandleanlimitswillbeactiveaslongasthereisavalidO
2
signal.This
deactivationviaX5‐03.2occurswithoutanotificationbeingdisplayedontheAZL52.
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 Pre‐purgemustbesetsothat20.9%(+/‐2.0%O
2
)isreadbytheQGO20sensor.Ifthisisnotmet,a
lockoutordeactivationwilloccurdependingonthesettingofparameterOptgMode.
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 WhenusingtheLMV52.440onloworultra‐lowNOxmeshburners,aStartModeof“IgnPtWithTC”is
typicallyusedcombinedwithadjustingO2InitOffsetinthenegativedirection(morerich).Ifdone
properly,thisshouldmakethetransitionfromlight‐offpositiontolowfirericherthannormal
operationsothatthetransitionisstableandreliableundervaryingenvironmentalconditions.
While
theburnerisbeingheldatPoint2awaitingNumberTauSuspendtoexpire,theO2InitOffsetwill
graduallydissolveandthe%O
2
willbetrimmedtosetpointbeforetheburnerisreleasedto
modulate.
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 TheAGOgascollectorshouldbemountedpertherequirementsshownbelow:
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