Siemens LMV5 Series Technical Instructions

TechnicalInstructions  LMVSeries
DocumentNo.LV5‐1000
Section6 Page24SCCInc.


O2InitOffset‐Fortheotherthreestartmodesotherthan"standard",thisisarichorleanbiasthatis
appliedtothete mperaturecompensation.Negativevalues(‐2to‐0.1)willbiasthetemperature
compensationmorerich,andpositivevalues(0.1to2)willbiasthetemperaturecompensationmore
lean.Notethattheunitsonthisare%O
2
,soasettingof‐2willoffsettheO
2
approximately2%more
rich.ThisoffsetisdissolvedaftertheO
2
trimbecomesactive(NumberTauSuspendexpires).
Menupath:Params&Display>O2Contr/Alarm>GasSettings>Startmode

ObservingtheBehavioroftheO
2
Trim

AftertheO
2
curvesarecommissionedandpostcommissioningtuningisdone,thebehavioroftheO
2

trimcanbeobservedandevaluatedtodetermineiffurthertuningisnecessary.

CurrentO2ValueandO2Setpoint
Menupath:Operation> O2Module

ParameterscanbetoggledbetweentoseehowwelltheO
2
setpointisbeingfollowedatdifferentfiring
ratesandwhentransitioningbetweenfiringrates.

Expectedbehavior:thedifferencebetweentheO
2
setpointandactualvalueshouldbeslightlymore
whentheburneristransitioningbetweenfiringratesandlesswhennottransitioning.Asaguideline,
thedifferenceshouldbelessthan+/‐0.2%O
2
whennottransitioningandlessthan+/‐0.4%O
2
when
transitioning.

ManVarO2Ctrl
Menupath:Params&Display>O2Contr/Alarm>ProcessData

Thisparametershowstheamountoftrim.Thevalueshownisdefinedbelow:
1. Avalueof50%indicatesnotrimming.
2. Valuesgreater than 50%‐moreairisneededtoachieveO
2
setpointcomparedtowhentheO
2

ControlCurvewascommissioned.
3. Valueslessthan50%‐lessairisneededtoachieveO
2
setpointcomparedtowhenO
2
ControlCurve
wascommissioned.

Expectedbehavior:shouldstayrelativelyconsistentfromlowfiretohighfire.Shouldchangewith
externalchangessuchascombustionairtemperature,barometricpressure,draft,heatingvalueoffuel,
airfiltersbecomingdirty,etc.

StateO2Ctrl
Menupath:Params&Display>O2Contr/Alarm>ProcessData

ThisparametersidentifiesthestateoftheO
2
control.Possiblevaluesare:
1. Deactivated–theO
2
controlwaseithermanuallyorautomaticallydeactivated
2. Locked–themanipulatedvariable(amountof trim)isbeingheldatthelastvalue
3. LockTStart–O
2
controliswaitingtoengageafter light‐off(waitingforNumberTauSuspendto
expire)
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Siemens LMV5 Series Specifications

General

Brand	Siemens
Model	LMV5 Series
Category	Control Systems
Language	English