Harman Stove Company SF360 Boiler User Manual


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10
Operation
Automatic Draft Control
Theheatoutputisregulatedbytheauto-
maticdraftcontrolonthebottomdoor.Theelectric
motor(A)opensandclosestheapperdoor(B).
Openingandclosingtheapperdoorregulates
theairowintotherebox.
Themaximumairowcanbeadjusted
byturningtheadjustingbolt(C).Turncounter-
clockwiseformoreair,andclockwiseforlessair.
Adjustthisboltonlywhiletheapperdoorisinthe
closedposition.Otherwise,motordamagecould
occur.
Theidleairadjuster(D)controlsthemini-
mumamountofairthatenterstherebox.Adjust-
mentismadebyturningtheadjusterverticalfor
zeroidleair,orhorizontalformaximumidleair.
Itisbesttostartoutwithamediumsettingas
showninFigure9.
FIG.8
FIG.9
Starting a Wood Fire
Makesuretheboilerandallpipingisfull
ofwaterandthatallairhasbeenpurgedfromthe
system.
Never start a re without water in the
system. An explosion will occur.
Turnonelectricalpowertotheboiler.This
shouldcausetheautomaticdraftcontroltoopen.
Opentheashpandoortoallowfreeairmove-
ment.Withthereboxdooropen,crumbleap-
proximately8sheetsofnewspaperandplaceon
thegrates.Laysomesmallkindlingontopofthe
newspaper.Besurethiskindlingisdryandno
morethan3/4in.indiameter.Layerthekindling
inacriss-crosstypepattern,toallowmaximum
airow.Nextlaysomelargerpiecesofwoodon
topofthekindling(approximately2in.diameter).
Usingamatchorlighter,lightthepaperjustinside
thedoor.Closeandlatchthereboxdoorandal-
lowtheretoburnafewminutes.Afteraboutve
minutes,closetheashpandoorandre-openthe
reboxdooraninchortwo,toallowthesmoketo
clear.Add4or5largerlogs(about4in.diameter)
tothewellestablishedreandclosetherebox
door.Leavetheashpandooropenforaboutve
minutesonly.Nowopenthereboxdoorusingthe
samemethodasbefore,alwaysclosingtheash
pandoorbeforeopeningthereboxdoor.Now
youcanloadthereboxtothedesiredlevel.You
mayloadwoodtothetopoftherebox.Close
andlatchthedoor.Theashpandoormayagain
beopenedtospeedtheignitionprocess.
Do not leave the boiler unattended with any
door open.
Afterthewoodisburningwell,closethe
ashpandoor.Theautomaticdraftcontrolwillnow
regulatethere,basedontemperaturedemand.
Theidleairadjustermustbetunedto
wheretheredoesn’tgooutduringlongperiods
withnodemand.Experiencewilldictatethebest
settingforyourinstallation.Normally,thetwo
manualdraftcontrolsonthereboxdoorarekept
closedwhileburningwood.
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