Owner's manual

Model 702G/O Advanced gas/oil burners — Instruction manual
Carlin part number MN702GO Rev. 06/23/14
– 14 –
Where appliance instructions differ from this manual, follow the appliance instructions.
Inspect/install fuel supply
 Inspecttheoilsupplysystem.Ensurethatthefuellinesare
correctlysizedandinstalledandthatthefuelowisunob-
structed,theoiltankiscleanandonly#1or#2heatingoil
aresupplied.Failuretosupplyareliableoilowcouldresult
inlossofheatandpotentialsevereequipmentdamage.
1. SeeFigure9fortypicaltwo-lineoilpiping.
2. Seepage15,Figures10and11,forfuelunitoilowdiagrams.
3. Installthefuelunitbypassplug(two-linesystemsonly).
Fuel supply to multiple burners
• Whenpossible,useseparatefuelsupplylinesforeachoilburner.Using
manifoldedoilsupplylinescancreateproblems.Ifthelinesareunder-
sized,operatingvacuumwillexceed limits.Ifthe linesareoversized,
fuelunitsmayhavedifcultypriming.Becausethelinesmustbesized
tohandlethecapacityofalltheburners,thelinesizewillalmostalways
betoolargewhenonlyasingleburnerisrunning.
• Ifmanifoldingcannotbeavoided,carefullysizethelinesfollowingthe
fuelunitsmanufacturer’sinstructions.
Fuel unit vacuum limitations
• SeeTable4forallowableliftsandlengthsofoillines.
• Thevacuumatthefuelunitinletportmustnotexceed12inchesmercury
duringanyoperatingcondition.
• Attachavacuumgaugetoeitherofthefuelunitinletports,andverify
thevacuumdoesnotexceedthelimitbelowduringallringconditions.
Oil flow schematic / fuel unit
connections
• Figure10showsoilowandfuelunitportfunctionsforCarlin702G/O
burners.
• Figure11appliesonlyforoptionalNYC-DARpressureregulationkits.
4. Install oil piping
Use two-line oil piping only
Thefuelunitmustbeconnectedtoatwo-line fuel
systemtoensureoilowthroughthepumpduring
gasoperation.Thisisneededtokeepthepump
coolandlubricated.Failureto protect the pump
canresultinearlypumpfailure.
Fuel unit bypass plug
 Thefuelunitisshippedwithitsbypassplugnotin-
stalled.Installthebypassplugonlywhenconnecting
toatwo-lineoilsystem.Operatingwiththeplugin
placeonaone-linesystem(notrecommended)will
damagethefuelunitandcouldleadtooilleakage
andrehazard.
 Ifthefuellineorfuelsupplyisabovetheburner,never
exceed3PSIGpressureatthefuelunitinlet.Install
asuitableOSVtoreducethepressure.Operating
thefuelunitwithhigherinletpressurecouldresult
infuelunitsealdamage,oilleakageandpotential
rehazard.
Guidelines:
• When installingoillines,use continuous runs of heavy-wall
coppertubingifpossible.
• Check fuelunit(oil pump) data sheet for recommended line
sizing,liftlimitationsandmaximumlength.
• Checkallconnectionsandjointstoensuretheyareair-tight.
• Usearettings.DONOTusecompressionttings.
• Neverusepipesealingtape.Fragmentscanbreakoffandplug
fuellinecomponents.
• Installashut-offvalveatthetankandoneneartheburner.(Use
fusiblehandledesignvalveswhenpossibleorwhenrequired
bycodes.)
• Installalargecapacityfuellter(ratedfor50micronsorless)
neartheburner.