Harman PF-120 - Burnpot Cleaning and Maintenance

Harman® • PF-120 Owner’s Manual_R3 • 2014 -___ • 10/1417
3-90-08120c
E. Burnpot Maintenance
Whencleaningtheburnpotusethesuppliedallenwrench
toremoveanybuild-upthatmayhaveaccumulatedinthe
holesoftheburnpotgrate.Makesurealltheholesareopen
andfreefromencrustedcarbonaroundtheedges.
Aspecialeffortshouldbemadetocleanthebottominside
corners ofthe burnpot where the augertube enters the
burnpot.Carbondepositscanbuildupovertimeinthisarea
thatcould cause a restriction tothe ow ofpellets and/or
causethepelletstopushontotheburngrateareaunevenly.
Thethreeverticalcutsintheburnpotsurface(Figure5.4)
aretheretorelieveexpansionstressdotothehighheatthe
materialsees.Someunevennessmayoccurinthisarea.As
longastheholesarekeptcleanandclearofanyblockage
thiswillnoteffecttheoperationoftheunit.
Removing the swing out burnpot:
• Makesuretheunitiscooleddownorcold.
• Removeashpan.
• Swingthelatchhandleupuntilyoufeelitcontactthetop
oftheswingplate.Thenpushupwarduntilyouseethe
burnpotswingout.Figure5.5.
• Lifttheburnpotupoffoftheswingplateintheunit.
• Removetheameguide.
• Emptyanynesthatmayhavebuiltupundertheburn
potgrate.Todothisloosenthe2thumbscrewslocated
onthefrontoftheburnpotandremovethecover.The
airchamber canbecleaned of anyashthat hasfallen
throughtheholesduringoperationandcleaning.Figure
5.6
Before replacing the swing out burnpot:
1. Inspecttheredsiliconegasketonthebackoftheburnpot
tomakesurethereisnodamageorcarbonaroundthe
edgesthatmaycauseapoorseal.Figure5.7.
2. Inspectthesealingsurfaceontheswingplateinsidethe
unit.Thesurfaceneedstobecleanandsmooth.
3. Do not forget to reinstall the ame guide or the
cleanout cover.
4. Make sure the burnpot is fully seated with the latch
handledownasfarasitcango.
Figure 5.4
Vertical cuts
Pulluponhandle
Figure 5.5
Burn pot hinge/Swing plate
Figure 5.7
Red silicone gasket
Thumb screws
Figure 5.6