5
Clearances to Combustible Materials
ThisfurnaceisDesignCertiedintheU.S.andCanada
by CSA International for the minimum clearances to
combustiblematerials.NOTE:Thefurnaceis listed for
installationoncombustibleornon-combustibleooring.
However,woodistheonlycombustibleooringallowed
forinstallation.Toobtainfurnacebasemodelnumberand
specicclearanceinformation,refertothefurnacerating
plate,locatedinsideofthefurnacecabinet.
Access for positioning and servicing the unit must be
considered when locating unit. The need to provide
clearance for access to panels or doors may require
clearancedistances over and abovethe requirements.
Allow18inchesminimumclearancefromthefrontof
theunit.However36inchesisstronglyrecommended.
SeeTable1forminimumclearancerequirements.
Table1.MinimumClearanceRequirements
INSTALLATION CLEARANCES
CLOSET ALCOVE
Front* 1" 1"
Rear 0" 0"
Sides 0" 0"
To p 6" 6"
Ductw/in3ftoffurnace 1/4" 1/4"
Vent 0” 0”
PlenumWithoutCoilBox 1" 1"
PlenumWithCoilBox 0” 0”
NOTES:
AlcoveInstallations-Allow18in.minimumclearance
fromfrontofunittonearestwallorpartitionforservicing.
Closetinstallations-Requireareturnairgrillinstalled
in the door or a partially louvered door across the
openingforproperaircirculation.Forclearances6”or
greater,theclosetmusthaveanopenfreeareaof235
in
2
minimum.Forspecialclearancesbetween1”-5”,
requirementsarealouvereddoorwithaminimumof
250in
2
(1613cm
2
)freearea.Afullylouveredclosetdoor
isstronglyrecommendedforbothinstallationtypes.
LEFT
SIDE
FRONT
RIGHT
SIDE
REAR
VENT
Theductworkshouldbeappropriatelysizedtothecapacity
of the furnace to ensure its proper airow rating. For
installationsabove2,000ft.,thefurnaceshouldhavea
sealevelinputratinglargeenoughthatitwillmeetthe
heatingloadafterderationforaltitude.
CombustionAirQuality
CAUTION:
Combustion air must not be drawn from a
corrosiveatmosphere.
To maximize heat exchanger life, the combustion air
mustbefreeofchemicalsthatcanformcorrosiveacidic
compoundsinthecombustiongases.Therequiredsource
ofcombustionairistouseoutdoorair.
Exposuretothefollowingsubstancesinthecombustion
airsupplywillresultinsafetyandperformancerelated
problems.Thelistbelowcontainsexamplesofchemical
containments found in a wide variety of common
commercialhouseholdproducts:
•Permanentwavesolutions
•Chlorinatedwaxesandcleaners
•Chlorinebasedswimmingpoolchemicals
•Watersofteningchemicals
•De-icingsaltsorchemicals
•CarbonTetrachloride
•Halogentyperefrigerants
•Cleaningsolvents(perchloroethylene)
•Printinginks,paintremovers,varnishes,etc.
•HydrochloricAcid
•Cementsandglues
•Antistaticfabricsofteners
•Masonryacidwashingmaterials
Heating Load
Thisfurnaceshouldbesizedtoprovidethedesignheating
loadrequirement.Heatingloadestimatescanbemade
usingapprovedmethodsavailablefromAirConditioning
ContractorsofAmerica(ManualJ);AmericanSocietyof
Heating,Refrigerating,andAirConditioningEngineers;
or other approved engineering methods. Excessive
oversizingofthe furnacecouldcause thefurnace
and/orventtofailprematurely.
CondensateDisposal
Themethodfordisposingofcondensatevariesaccording
tolocalcodes.Consultyourlocalcodeorauthorityhaving
jurisdiction. Neutralizer kit P/N 902377 is available for
use with thisfurnace. Pleasefollowtheinstructions
providedwiththekit.