Siemens LMV51.140C1 - Page 182

TechnicalInstructions  LMVSeries
DocumentNo.LV5‐1000
Section6 Page10SCCInc.


NOTE:The%O
2
valuesreadanddisplayedbytheLMV52systemarealwaysonawetbasis(%O
2

wet).Mostifnotallexternalexhaustgasanalyzersreadanddisplay%O
2
andothergasesonadry
basis(%O
2
dry).AllO
2
curvesmustbecommissionedusing%O
2
wetvaluesasreadbytheLMV52.
TheexternalexhaustgasanalyzerisusedtoreadCO,NOx,andalsoservesasawaytodouble
checkthe%O
2
wetvalues.Figure6‐11givestheapproximaterelationshipbetween%O
2
wetand
%O
2
dry.

4. MakesurethattheQGO20O
2
sensorhasbeenactivatedforatleast2hoursandisupto
temperature.ThisgivestheZirconiumcelltimetoheat‐soakandalsotoburnoffanycontaminants.
Thetemperatureofthecellcanbecheckedifdesiredthroughthefollowingmenupath:

Params&Display>O2Module>ProcessData>QGOSensorTemp

5. Withtheburneroff(Phase12),setthefuelrichlimit(O2Alarmvalu
e)foreachpoint.Thiscanbe
donewiththeburneroffsincethesevalueshavealreadybeenfoundandrecordedduringRatio
ControlCurvecommissioning(seeabove).OnceintotheO2Alarmcurve,simplyenterinthe
recordedvalueforeachpointandsaveeachpoint.ToaccesstheO2Ala rm curve,usethefollowing
menupath:

Params&Di
splay>O2Contr/Alarm>GasSettings>O2Alarm>O2Alarm

6. Withtheburneroff(P
hase12),setthefuelleanlimit(O2MaxValue)basedonthevaluesthathave
alreadybeenfoundandrecordedforPoint1andPoint10durin
gRatioControlCurvecommissioning
(seeabove).Tosetthefuelleanlimit,usethefollowingmenupath:

Params&Display>O2Contr/Alarm>GasSettings>O2Alarm> O2MaxValue

7. IftheLMVxCurvesspreadsheetisnotbeingused,ta
ketherecordedO
2
Alarmvaluesandadd0.5%
foreachpoint.Takethe"saved"%O
2
fromtheRatioControlCurveandsubtract1.0%foreachpoint.
ThiswillprovideatargetbandforsettingtheO
2
ControlCurvepoints.Example:TheO
2
Alarmvalue
is2%.TheRatioControlCurvepoint"saved"is4%.Add0.5%totheO
2
Alarm=2.5%.Subtract1%
fromtheRatioControl=3%.Forthispoint,thetargetfortheO
2
Controlisbetween2.5%and3%.

8. Whenitissafetodosoandwhenthereisadequateloadavailable,starttheburner/boilerandletit
warmuptooperatingtemperature.

9. AccesstheO
2
RatioControlCurveandtheO
2
ControlCurveusingthefollowingmenupath:

Params&Display>O2Contr/Alarm>GasSettings>O2Control

10. OncetheO
2
ControlCurveisentered,Point2shouldbedisplayed.PressingEnteragainshoulddrive
theburnertoPoint2ifitisnotalreadythere.WhentheburnerisdrivingtoPoint2,acarat(>)will
bedisplayed.OncetheburnerisatPoint2,acolon(:)willbedisplayed.Iftheaux3actuatorisused
forFGRandFGR‐Modeisnotsetfor“Aux3onCurve”,apound(#)indicatestheaux3ac
tuatorhas
notreleasedtothecurve.


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