Siemens LMV5 Series Technical Instructions

LMVSeriesTechnicalInstructions 
DocumentNo.LV5‐1000
SCCInc. Page17 Section4

SuggestedRatioControlCurveCommissioning

1. Theprocedurebelowassumesthefollowing:

a. Pre‐requisitesforBasicLMV51systemsorLMV52systems(fromabove)aremet.
b. ProcedureforConfiguring(Parameterizationof)anLMV5hasbeendone(fromabove).
c. Thisisafirst‐timecommissioningoftheLMV5andthecombustioncontrolcurveisblank
(nopointsentered).
d. Theburnerhasbeenlitoff,andisatignitionposition.
e. Acalibratedstackgasanalyzerissamplingthestac
kgasandcanread%O
2
andppmCO.
f. Theboilerhasbeenwarmeduptooperatingtemperature/pressure.

2. Ifactivated,setparameterProgramStoptodeactivated.Thiswillpermittheratiocontrolcurve
tobecommissioned.Theratiocontrolcurvecanbefoundunderthemenu:

Params&Display>RatioControl>GasSettings>CurveParams

3. GotoPoint1.Point1isautomaticallysettoignitionpositionvalues.WhenPoint1isentered,
theAZLwillpromptto“change”or“delete”thepoint.“Change”shouldbeselected.Next,the
AZLwillpromptfor“Followed”or“Notfollowed”.“Followed”shouldbeselected.Allactuators
and / or VSD that have been activated should show up on this screen.If more than one Aux
actuator or VSD are activated, the screen may need to be scrolled down to show the other
actuators.IfanO
2
sensorisbeingusedandisactivated,theO
2
readingwillalsobedisplayed.

NOTE:Usingthe“Notfollowed”optionispossiblebutnotrecommendedformostsituations
sincetheresultsofchangingtheactuatorpositionsin“Notfollowed”modecannotbeseen
realtimeonacombustionanalyzer.When“Followed”isselected,acarat(>)isshownwhen
theactuators/VSDaremovingtothedisplayedposition.Acolon(:)isshownwhenthe
indicatedpositionsarereached.Apound(#)isshownwh
entheAux3FGRactuatorisbeing
heldatpositionduetoatimeortemperature‐basedFGRhold.

4. If the low fire point is not known (maximum burner turndown), adjust the Point 1 actuator
positions until maximum safe burner  turndown is achieved.Record the fuel  flow.If the fuel
flowisnotavailable,burnerheadpressurecanbeusedasalastresort.



Figure4‐5:Point1ontheRatioControlCurve

HOME

Siemens LMV5 Series Specifications

General

Brand	Siemens
Model	LMV5 Series
Category	Control Systems
Language	English