Installation guide

7
VentilaireIIIorIV(AccessoryItem)
CAUTION:
MAINTAIN 2 1/2” MINIMUM CLEARANCE BETWEEN
FLUE PIPE AND FLEX DUCT. FAILURE TO
COMPLY WITH THIS RESTRICTION COULD
CAUSE EQUIPMENT DAMAGE. VENTILAIRE III
ILLUSTRATED OTHER LISTED VARIATIONS
AVAILABLE.CHECKWITHMANUFACTURER.
The Ventilaire air quality packages are available to meet
theventilationrequirementsasoutlinedinH.U.D.Standard
Part3280.103 (b)(2).Thesepackagesintroduceoutdoor
air into the living space during furnace blower operation.
TheVentilAireIValsoservestoexhaustmoistand/orhot
airfromtheatticspace.SeeFigure2fortypicalinstallation.
Completeinstallationinstructionsaresuppliedwitheachair
qualitypackage.
VENT PIPE
3 FEET
MIN.
ROOF JACK
ASSEMBLY
ROOF CAP
ASSEMBLY
FLEX
DUCT
CEILING TRIM
COLLAR
CONNECTOR
DRAW BAND
FURNACE
DRAW
BAND
57”
Figure1.TypicalInstallation
VentilAireIII
VentilAireIV
Figure2.VentilAireIII&IV
CIRCULATING AIR REQUIREMENTS
WARNING:
Allsupplyductsmustbesecuredtothefurnace
with sheet metal screws and adequately sealed.
Whensupplyairisprovidedthroughthebottom
oftheunit,thejointbetweenthefurnaceandthe
plenummustbeairtight.
Thesurfacethatthefurnaceismountedonmust
providesoundphysicalsupportofthefurnacewith
nogaps,cracksorsaggingbetweenthefurnace
andtheoororplatform.
Supply air ducts must not be connected to any
otherheat producingdevice such as a replace
insert,stove,etc.Thismayresultinre,explosion,
carbon monoxide poisoning, personal injury, or
propertydamage.
Plenums&AirDucts
Thisunitisdesignedonlyforusewithabottomsupplyduct
andmustbeinstalledinaccordancewiththestandardsofthe
NationalFireProtectionAssociationStandardforInstallation
of Air Conditioning Systems (NFPA 90A), Standard for
InstallationofResidenceTypeWarmAirHeating and Air
ConditioningSystems(NFPA90B),andallapplicablelocal
codes.NFPApublicationsareavailablebywritingto:National
FireProtectionAssociation,BatterymarchPark,Quincy,ME
02269orvisitwww.NFPA.orgontheinternet.
• Designtheairductsaccordingtomethodsdescribedby
theAirConditioningContractorsofAmerica(ACCA).
• Airductsmustbealuminum,tinplate,galvanizedsheet
steel, or other approved materials for outlet air ducts.
Snap-Lock or Pittsburgh-Lock seams are preferred. All
other types of seams must be made tight to prevent
leakage.
• It is good practice to seal all connections and joints
with industrial grade sealing tape or liquid sealant.
Requirements for sealing ducts vary from region to
region.Consultwithlocalcodesforrequirementsspecic
toyourarea.
• Gaspipingmustnotruninorthroughanyoftheairduct
system.
SupplyAirConnections
• The supply duct system must be designed so that the
static pressure measured external to the furnace does
not exceed the listed static pressure shown on the
furnace rating plate. The supply air must be delivered
to the heated space by duct(s) secured to the furnace
casing,runningfulllengthandwithoutinterruption.
• Ductsystemmustbedesignedsothatnosupplyregisters
arelocatedinductsystemdirectlybelowthefurnace.
Dampers
Anautomatedshutoffdamperisrequiredwhenthehomeis
airconditionedbyaself-containedunit.Adamperisrequired
to prevent chilled air from owing over the furnace heat
exchanger.Thisdamperisdesignedtotinthefeederduct
cavity,directlyunderthefurnace.Forproperinstallation,refer
totheinstructionsprovidedwiththedamper.SeeTechnical
SalesLiteratureonline.