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.