Harman PF100 - Maintenance - Heat Exchanger Cleaning; Cleaning the accordion heat exchanger;firebox

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3-90-08101R23_06/13
Cleaning the accordion heat exchanger/rebox:
Thiscleaningshouldbedonemonthly,oraftereachtonof
pelletsused.Thefrequencyofthiscleaningwillbedirectly
relatedtothe qualityand thequantityof thepellets being
used. Keep in mind that the cleaner the heat exchanger
surfaceiskept,thehighertheheattransferefciencywillbe.
Due to it’s ease of restarting it is recommended that the
furnacebeOFFandCOOLbeforecleaning.
Beforestartingto cleanthe insideof therebox areait is
recomendedthatallofthebafingberemoved.Startwith
theupperheatexchangerbafe.SeeFig.66.Pushstraight
upwardonthelower ashslideangle aprox.1/2”.This will
releasethebafefromthepositioningbracketsandallowit
tobetiltedtowardtheburnpotandremovedfromthefurnace.
Note: Observethepositioningtabsandbracketsystemon
therearoftheupperbafeasitisbeingremoved,foreasier
replacementlater.
Removethelowerbafeplate.Thisbafeisaatplatethat
sitsonthefurnaceoor.Tipthetopedgetowardtheburnpot
andliftupandoutofthefurnace.Notehowthebafebottom
edge sits behind the ashpan guideand against the heat
exchanger.SeeFig.67.
Withallofthebafingremoved,theentirereboxareaand
the accordion heat exchanger can be cleaned. Use the
pointedendofthescrapersuppliedtocleantheaccordion
heatexchanger.Asmallwispbrush,wirebrush,oranold
stiffbristledpaintbrushworksbestforcleaningtherebox
walls.Alloftheyashremovedduringcleaningwillfalltothe
bottomofthefurnacewherethereisanunobstructedaccess
forcleaning.Eventhebottomendsofthechainscanbeseen
andaccessedeasilyfromthedooropening.SeeFig.68.
Maintenance
Fig. 66
Ash slide angle
Upper Bafe
Fig. 67
Ash Pan Guide
Lower
Bafe Plate
Fig. 68Shaker Chain Ends
CAUTION
!
Cleanout of the heat exchanger, ue pipe, chimney,
and combustion blower fan housing, is especially
important at the end of the heating season to minimize
corrosion during the summer months, caused by
accumulated ash.