Harman PF100 - Maintenance - Flue and Heat Exchangers; Cleaning the Tube heat exchangers

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3-90-08101R23_06/13
Cleantheueoutletthroat(thisistheholethatgoesupinto
theuepipe).SeeFig.72.
Note: The ESP sensing tip extends into this same area.
CARE MUST BE TAKEN NOT TO DAMAGE THE ESP
DURING CLEANING.BendingoftheESPwillmakeitdifcult
toremoveifitshouldbecomenecessary.SeeFig.72.
Cleantheinnerchamberoftheblower.SeeFig72.
Cleanthefurnaceblowerplate,sealingoverlap.SeeFig72.
Inspectthetopsoftheheatexchangertubeswherethechain
shakermechanismislocated.Makesuretherearenoyash
buildupsthatmayblocktheeasyowofuegassesintothe
combustionblowerinlethole.(Aashlightmaybenecessary.)
Inspectthechainshakermechanismforproperoperation.
Note: Fly ash can build up to the top edges of the heat
exchanger tubes without affecting operation. The chain
shakerwillcauseanyexcesstofalldownintothechamber
underthetubeswhereitcanbecleanedoutthroughthere
box.SeeFig.73.
Cleaning the Tube heat exchangers:
Theheatexchangerstubeshaveanexternalhandlethat
operatesthecleaningmechanism.SeeFig.74.
Thiscleaningshouldbedoneatleastonceaweek,although
it can be done as often as desired. The cleaner the heat
exchangers are, the more efficient the furnace will be.
Thiscleaningcanbedoneatanytimeandinanymodeof
operation.
Thehandlehastwodirectionsofmovement,RighttoLeft
andInandOut.Allinsidesurfacesoftheserectangulartubes
can be cleaned with this range of motion. First, with the
handlepushedin,turnthehandlerighttoleft,thefullsweep,
severalstrokes. Second, with the handle pointing straight
down,pulloutandpushinwardseveralstrokes.Third,with
thehandleallthewayout,turnthehandlerighttoleft,the
fullsweep,severaltimes.Endwiththehandlepushedinward
andpointingdown.
Maintenance
ESP
Access to ue outlet throat
Fig.72
Sealing overlap
Lower cleanout chamber
Fig. 73
Shaker
handle
Fig. 74
Inspect ue pipes, ue pipe joints and ue pipe seals
regularly to ensure that smoke and ue gases are
not drawn into, and circulated by, the air-circulation
system.
CAUTION
!