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MaintainingYourBoiler
Checkthe waterlevelevery dayor two.Verifythe watertineshownby
operatingthedrainvalvean thegauge.Be suretop and bottom valves
on gaugearealwaysopen sothatactualwaterlevelwill beshown
atalltimes,
POPSAFETYVALVE
Thisvalveshouldopenautomaticallywhenthesteampressureexceedsthe
safelimit(perinstructionspackagedwithvalve).Shoulditeverfailto open
undertheseconditions,shut downyoursystem.Havethevalvereplaced
immediately,The pop safetyvalve shouldbe testedmonthlyduringthe
heatingseason.Refertothevalvemanufactureflsinstructionspackagedwith
thepopsafetyvalve.
LOWWATERCUT-OFF
TheLowWaterCut-offwillin_rrupttheelectricalcurrenttotheburnerwhen
thewaterlinein theboilerdropsto a lowlevel.It isveryimportanttokeep
thefloatchamberfreefromsediment,a conditionessentialto dependability.
To keepany accumulationfrom interferingwith floatactionis to "BLOW
DOWN"orflushoutthecontrolregularly.Thismustbedonetwo-threetimes
thefirstweekafterinstallationandoncea weekthereafterduringtheheating
season.Doitwhiletheboileris inoperation.Firstnotewaterlevelin gauge
glass.Openblow-offvalveatbottomof control,waterwillpourout,flushing
awaysediment.Drainuntilwaterisclear,abouta pail,thenclosevalve.If
waterlevelingaugeglasshasdropped,addwatertoboilertorestorelevel.
Consultlowwater cut-offmanufacturersinstructionsincludedwith boiler.
NOTE:Openingblow-offvalvecheckscut-offoperationtoo.Asfloatdrops
withfallingwaterlevel,burnerswillshutoff.Aftervalveisclosedandnormal
operatingconditionsarerestored,burnerswillresumefiring.
Boilersshouldnot be drainedbetweenheatingseasons.Onlywhenthe
waterin thesystembecomesdirtyshouldtheboilerbe drained,flushedor
boiledout,andrefilled.Steamboilersmaybeentirelyfilledwithwaterduring
thesummermonthstoexcludeair.
CLEANINGYOURBOILER
Undernormaloperatingconditions,withthe burnersproperlyadjusted,we
recommendthat you have the flue passages,burneradjustment,and
operationof the controlscheckedonce each year by a Service
Technician.
Before the start of each season (orwheneversystemhasbeen
shutdownforsometime)recheckthewholesystemforleaks...andrecheck
theboilerandventpipeforleaks.Replaceor patchanyboilersealsthatare
faulty.
BOILERFLUEPASSAGES
FluePassagesbetweensectionsshouldbeexaminedyearlyandcleaned.
Removevent pipe.Raisetoppanelof boilerandswingoutto exposeflue
collector.Removefluecollectortop. Cleanpassagewaysbetweensections
witha flexiblehandlewirebrush.Removedirtfomthebottomoftheboiler
and reassembleall parts.Be surevent pipeconnectionsto chimneyare
secureandnoobstructionsarepresent.
FOAMING,PRIMINGORSURGING
Thesetermsareusedtodescribeafluctuatingwaterline- whenwater
leavestheboiler.
Itiscausedbyanycombinationofthefollowing:
1.Threadingoilandorganicmatterintheboilerwater.(Mineraloil,orcore
sanddoesnotcausesurging.)
2. Faultyquickventsthatdonotreleaseair untila sizeablepressureisbuilt
up- replace.Ifdirty,cleansothatyoucaneasilyblowthroughvalve.
3. Improperheader design - whensteamflowsin oppositedirectionof
equalizerlineon"Hartfordloop."Generallya 15"horizontalrunbetween
riserandmaintakeoffwill allowentrainedwaterto falloutofthesteam
vaporsoitcanreturnto boiler.(Seepage7,Fig.8)
4.Adjustmentof steamlimitcontroltoa widedifferentialincreasesdifficultyif
quickventsare oldstyle,slow-releasingtypeor dirty.Alwayssetsteam
limitcontroldifferentialaslowaspossible.
5.Soapanddetergentscauseextremesurging- cleanthoroughlyby
skimmingtheboiler.
CAUTION
Neverrefilla hotboilerwithcoldwater- thedangerofthermalshockmay
crackasection.
CAUTION
Neverallowelectricianor oil burnermechanicsto tryouttheirwork by
turningon oil burnerfor evenone secondunlessboileris filledto the
properoperatinglevel.
SYSTEMCHECKSAFTERFIRSTSTARTING- STEAMSYSTEMS
Readthe instructionspackagedwithyourcontrolsand makechecksand
adjustmentsaccordingly.Start the burnerand set the Thermostatfor the
desiredroomtemperature.WhenadjustingtheSteamPressurecontrol,watch
thesteamPressureGaugeanduseits pressurereading- asitwillbemore
accuratethanthecontrol.(Anydifferencebetweenthetwowillbeduetotheir
differentlocation.)
BOILERWATERTREATMENT
Inclosedhotwaterheatingsystems,negligibleamountsofmakeupwaterare
used,and watertreatmentis not required.In steamsystemswherethe
systemistight,freefromleaks,andall thesteamis returnedtotheboileras
condensate,theamountofmakeupwaterissmall.Again,watertreatmentis
notrequired.
On steamsystemswith less than 90% of the steambeingreturnedas
condensate,orwithveryhardor corrosivemakeupwater,treatmentmaybe
desirable.Followthe recommen-dationsoftheASME(AmericanSocietyof
MechanicalEngineers)Boilerand PressureVesselCode,SectionVl, latest
version.
BETWEENHEATINGSEASONS
Boilersshouldnotbedrainedbetweenheatingseasons.Boilersinclosedhot
waterheatingsystemsmaybeleftasis.Steamboilersshouldbeentirelyfilled
withwaterduringthesummermonthstoexcludeair.
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