Dacor DHI361 Instrukcja Użytkownika Pobierz pdf (Strona 8)

pl a n t h e Du c t wo r k in S t a l l a t i o n

WARNING

Toreducetheriskoffireandtoproperlyexhaust•

air,besuretoductairoutsidethehouseorbuilding.

Donotventexhaustairintospaceswithinwallsor

ceilingsorintoattics,crawlspacesorgarages.

Tapeallductjointssecurely• topreventcombustion

by-products,smokeorodorsfromenteringthehome.

Doingsowillalsoimprovesystemefficiency.

Donotexhaustmorethanone• ventintoasingleduct.

Useonly• ductworkconstructedofmaterialsdeemed

acceptablebystate,municipalandlocalcodes.

Rangehoodsmayinterrupttheproperflowof•

smokeandcombustiongasesfromfurnaces,gas

waterheatersandfireplaces.Toavoiddrawing

lethalgasesintothehome,followthemanufactures

recommendationforthesedevicesandconsultNFPA

andASHRAErecommendations.

DO NOT• installanadditionalin-lineorexternal

blowertoincreasethelengthoftheductrun.Even

smalldifferencesbetweenblowerairflowratescan

greatlyreducetheairdrawbythehood.

Allductworkmaterials(includingscrewsandducttape)•

mustbepurchasedseparatelybythecustomer.When

planningnewductwork,alwayslookfortheshortest,

mostdirectroutetotheoutside.

Thehoodexhaustconnectstoan8-inchroundduct.•

Youcanincreasetheductsizeovertheductrunif

desired.Topreventabackdraft,neverdecreasethe

ductsizeovertherun.

Donotrelyonducttapealonetosealductjoints.•

Fastenallconnectionswithsheetmetalscrewsand

tapealljointswithducttape.Usesheetmetalscrews

asrequiretosupporttheductweight.

Topreventback-drafts,adamperattheductoutletmay•

alsoberequired.

Makesureductworkdoesnotinterferewithfloorjoists•

orwallstuds.

Calculating the Maximum Duct Run Length

Themaximumstraightductlengthforthehoodis100

feet.Foreachelbowandtransitionaddedtotheduct

work,acertainnumberoffeetmustbesubtractedfrom

themaximumstraightlengthtocompensateforwind

resistance.Todeterminethelengththeductworkcannot

exceed,subtractalloftheequivalentlengthsoftheelbows

andtransitionslistedbelowfrom100feet.

Duct Work Equivalent Lengths

DUCT PIECE SUBTRACT

90°elbow(8”Dia.) 7feet

45°elbow(8”Dia.) 3feet

31/4”x10”to8”round 4foot

Wallcapwithdamper 30feet

Roofcap 30feet

Duct Work Design Tips

Whereverpossible,reducethenumberoftransitions•

andturnstoasfewsharpanglesaspossible.Two

staggered45°anglesarebetterthanone90°.

Keepturnsasfarawayfromthehoodexhaustas•

possible,withasmuchspacebetweeneachbendas

possible.

Forbestperformance,useroundductinsteadof•

rectangular,especiallywhenelbowsarerequired.

Ifmultipleelbowsareused,trytokeepaminimumof•

24”(61cm)ofstraightductbetweenthem.

Avoid“S”or“backtoback”configurationsofadjacent•

elbows.

Inregionswheretheweathergetsextremelycold,•

thermalbreaks,suchasashortsectionofnon-metallic

duct,shouldbeusedtoavoidindoorheatloss.The

breakshouldbelocatedasclosetothepassthrough

pointtotheoutsideaspossible.

Donotuseflexiblemetalduct.•

Donot• useductworkthatissmallerincross-sectional

areathantherecommendedsizeduct(8”round).

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