LMVSeries TechnicalInstructions
LV5‐1000
SCCInc. Page48 Section3
6) IfparameterOilPumpCouplingissettoMagnetcoupl,theoutputfortheoilpumpcanbeenergizedinPhase22orinPhase
38,dependinguponhowparameterIgnOilPumpStartisset.IfparameterOilPumpCouplingissettoDirectCoupl,theoutput
willenergizewiththeblowerandde‐energize15secondsaftertheblowerde‐energizes.
7) Ifgasvalveprovingisperformedonstartup(immediatelyafterphase30),theactuatorswillbeinprepurgeposition.Ifgas
valve proving is performed on shutdown (immediately after phase 62), the actuators will be in the same position as they
wereinphase62.Theactuatorswillnotmoveduringvalveproving.
8) IfparameterAirPressureTestissettoactivated,theairpressureswitchmustopenafterpostpurgeiscomplete,causinginput
terminalX3‐02.1tode‐energize.TheLMV5willwaitabout30secondsinphase10(drivingtohomeposition)fortheswitch
toopenbeforetheLMV5goesintoalarm.Thisisdonetocheckforweldedcontactsintheairpressureswitch.Ifairpressure
switchalarmsareencounteredinphase10,increasingthesetpointoftheairpressureswitchtypicallycuresthisproblem.If
AirPressureTestissettodeactInStby,theairpressureswitchisnotcheckedinphase10or12,buttheswitchmustbeopen
ortheLMV5willnotstartwhenitreceivesacallforheat.
9) The LMV5 can be configured for different reactions to extraneous light (a flame signal when there should not be one).
Depending on how parameters ReacExtranLight and ExtranLightTest are configured, the LMV5 can lockout, block the
startupsequence,orignoreitaltogether.Theextraneouslighttestshouldalwaysbeenabledforgas/oilfiredboilers.The
onlytimeparameterExtranLightTestshouldbesettodeactivatedisforapplicationssuchaswasteincineration.
10) Ifdirectstartisenabledandthereisacallforheatafterphase62,theLMV5willomitphase78andwillgotophase79.In
phase 79, the LMV5 will check the blower air pressure switch with the blower still running by using a three‐way solenoid
valve(APSchecking).
Iftheswitchchecksout,theLMV5willthenproceeddirectlytophase24(drivingtoprepurgeposition).
11) SafetyTime1 isdefinedasthe overlapoftheignitionsparkandpilot valve.SafetyTime 2isdefinedas the overlapofthe
pilot valve and the main fuel valves. Interval 1 and Interval 2 are stabilization times for the pilot and main flames,
respectively.
12) IfparameterContinuousPurgeissettoactivated,fanoutputX3‐01.1willbeenergizedinallphases.Typicallythisisusedin
burnerapplicationswherereturnheatmaybeaproblem.
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