Specifications

Chapter3
Installation
America’sFavoriteStovesSince1980 Page19
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B
LOCK‐OFFPLATEINSTALLATION
Wheneverthisapplianceisinstalled withadirectconnectionablock‐offplate,orothernoncombustibleseal‐off
device(e.g.damperadapter),willneedtobeinstalled.Thisdeviceisused tosealthechimney,insuringno
smokeentersthehomeandprovidingthechimneysystemwithasealto
promotedraft.Thedirectionsbelow
detailthestepsforconstructionandinstallationofablock‐offplate.
1. Determinealocationfortheblock‐offplateatthetopofthefireboxbelowthedamperarea(makeit
highenoughtoallowinstallationoftheconnectionpipe).Thelocationshouldbe
levelandinanarea
whereitcanbemountedeasily.Measurethewidthattherear("A")andfront("B")ofthefireboxatthe
heightwheretheblock‐offplatewillbeinstalled(seetheillustrationbelow).Thenmeasurethedepthof
thelocationwheretheblock‐off
platewillbeinstalled("C").
NOTE:Mostmasonryfireplaceshavesquarefireboxeswhilecertainzero‐clearance(metal)fireplaces
oftenhavedomedfireboxtops.Thismakeszero‐clearanceblock‐offplatesmoredifficulttoinstall.To
simplifytheprocedure,insulationmaybeusedtosealtheroundededges.
2. Makea
cardboardtemplateofthemeasurements,butadda2"flangetoeachside.Thisflangewillbe
usedtomounttheblock‐offplatetotheinsideofthefirebox.Bendtheflangesdownwardsonthe
templateandplaceitinsidethefireplace.Ifthetemplatefitscorrectlyinitsplanned
location,gotothe
nextstep.Ifitdoesnot,makeanewtemplatewiththeappropriatecorrectionsuntilitfitscorrectly.
3. Withthetemplateinplace,markthelocationoftheflue(see“Dimensions”onpage6).Thislocation
approximatesthecenterofthefluewhentheinsert
isinplace(aslightoffsetmayoccurbasedupon
insertandblock‐offplateplacement).Removethetemplateandcuta61/4"diameterholecenteredon
thismark.
4. Maketheblock‐offplateof24gageorthickersteeltomatchthetemplate.Drilltwoholesineach
flange
formountingtheplate.
5. Mounttheblock ‐offplateusing masonryscrews.
NOTE:Usesheetmetalscrewsonzero‐clearance(metal)fireplaces(screwsneedonlybelongenoughto
penetratethefirstlayerofmetal).
6. Insulatetheblock‐offplateusinghigh‐temperaturefiberglassinsulation(Ceri‐blanket®
orequivalent)
andfurnacecement(allowthecementtodryforatleast24hoursbeforeburning).
7. Afterplacingtheapplianceandinstallingthepipethroughtheblock‐offplate,usehightemperature
fiberglassinsulationandfurnacecementtosealanycracksbetweenthepipeandblock‐offplate.
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