Goodman ComfortNet GCVC95 Series User manual

5151SanFelipeSuite500
Houston,TX77056
www.goodmanmfg.com•www.amana-hac.com
©2009 - 2012 Goodman Manufacturing Company, L.P.
I NSTALLATION I NSTRUCTIONS FOR *CVC9/95 & *MVC95 - T WO -S TAGE G AS F URNACE
IO-430
6/12
(Type FSP CATEGORY IV Direct or Non Direct VentAir Furnace)
These furnaces comply with requirements em-
bodied in theAmerican National Standard / Na-
tional Standard of CanadaANSI Z21.47·CSA-2.3
Gas Fired Central Furnaces.
Installer: Affix all manuals adjacent to the unit.
*NOTE: Please contact your distributor
orourwebsitefortheapplicable
SpecificationSheet referred to in this manual.
ATTENTION INSTALLING PERSONNEL
As a professional installer you have an obligation to know the product better than the customer. This includes all
safety precautions and related items.
Prior to actual installation, thoroughly familiarize yourself with this Instruction Manual. Pay special attention to all
safety warnings. Often during installation or repair it is possible to place yourself in a position which is more
hazardous than when the unit is in operation.
Remember, it is your responsibility to install the product safely and to know it well enough to be able to instruct a
customer in its safe use.
Safety is a matter of common sense...a matter of thinking before acting. Most dealers have a list of specific good
safety practices...follow them.
The precautions listed in this Installation Manual are intended as supplemental to existing practices. However, if
there is a direct conflict between existing practices and the content of this manual, the precautions listed here
take precedence.
RECOGNIZE THIS SYMBOL AS A SAFETY PRECAUTION.

2
SAFETY PRECAUTIONS ..................................................................................................................................... 5
SHIPPING INSPECTION ...................................................................................................................................... 6
ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS ............................................................................................... 6
TOTHE INSTALLER ......................................................................................................................................... 6
IMPORTANT NOTE TO THE OWNER REGARDING PRODUCT WARRANTY.......................................................................... 6
PRODUCT DESCRIPTION .............................................................................................................................................. 7
FEATURES ..................................................................................................................................................... 7
PRODUCT APPLICATION ............................................................................................................................................... 7
LOCATION REQUIREMENTS & CONSIDERATIONS ............................................................................................................... 8
CLEARANCES AND ACCESSIBILITY ....................................................................................................................... 9
FURNACE SUSPENSION .................................................................................................................................... 9
EXISTING FURNACE REMOVAL ........................................................................................................................... 9
THERMOSTAT LOCATION .................................................................................................................................. 10
COMBUSTION & VENTILATION AIR REQUIREMENTS ......................................................................................................... 10
INSTALLATION POSITIONS ........................................................................................................................................... 10
HORIZONTAL APPLICATIONS &CONSIDERATIONS .............................................................................................................11
DRAIN TRAP AND LINES .................................................................................................................................11
LEVELING.....................................................................................................................................................11
ALTERNATE VENT/FLUE AND COMBUSTION AIR CONNECTIONS .................................................................................11
ALTERNATE ELECTRICAL AND GAS LINE CONNECTIONS ......................................................................................... 12
DRAIN PAN ................................................................................................................................................. 12
FREEZE PROTECTION ..................................................................................................................................... 12
FURNACE SUSPENSION .................................................................................................................................. 12
PROPANE GAS/HIGH ALTITUDE INSTALLATIONS .............................................................................................................. 12
VENT/FLUE PIPE & COMBUSTION AIR PIPE ................................................................................................................. 12
DUAL CERTIFICATION: NON-DIRECT/DIRECT VENT ............................................................................................... 12
MATERIALS AND JOINING METHODS .................................................................................................................. 13
PROPER VENT/FLUE AND COMBUSTION AIR PIPING PRACTICES ............................................................................. 13
TERMINATION LOCATIONS ............................................................................................................................... 13
CANADIAN VENTING REQUIREMENTS ................................................................................................................. 14
STANDARD FURNACE CONNECTIONS .................................................................................................................. 14
ALTERNATE FURNACE CONNECTIONS ................................................................................................................. 15
NON-DIRECT VENT (SINGLE PIPE) PIPING ........................................................................................................ 17
DIRECT VENT (DUAL PIPE) PIPING .................................................................................................................. 18
VENT/INTAKE TERMINATIONS FOR INSTALLATION OF MULTIPLE DIRECT VENT FURNACES .............................................. 20
CONCENTRIC VENT TERMINATION ..................................................................................................................... 20
SIDE WALL VENT KIT .................................................................................................................................... 20
CONDENSATE DRAIN LINES & DRAIN TRAP ................................................................................................................. 21
STANDARD RIGHT OR LEFT SIDE DRAIN HOSE CONNECTIONS ............................................................................... 21
UPRIGHT INSTALLATIONS-TRAP ON RIGHT SIDE................................................................................................... 22
UPRIGHT INSTALLATIONS-TRAP ON LEFT SIDE .................................................................................................... 24
HORIZONTAL INSTALLATIONS ............................................................................................................................ 25
ELECTRICAL CONNECTIONS ....................................................................................................................................... 27
WIRING HARNESS ......................................................................................................................................... 27
115 VOLT LINE CONNECTIONS ........................................................................................................................ 27
JUNCTION BOX RELOCATION ........................................................................................................................... 27
24VOLT THERMOSTAT WIRING ........................................................................................................................ 28
SINGLE-STAGE HEATING THERMOSTAT APPLICATION ............................................................................................ 28
24VOLT DEHUMIDISTAT WIRING....................................................................................................................... 29
FOSSIL FUEL APPLICATIONS ............................................................................................................................ 29
115 VOLT LINE CONNECTION OF ACCESSORIES (HUMIDIFIER AND ELECTRONIC AIR CLEANER) ................................... 29
24 VOLT HUMIDIFIER ..................................................................................................................................... 30
AUXILIARY ALARM SWITCH: ............................................................................................................................. 30
TableofContents

3
GAS SUPPLY AND PIPING ......................................................................................................................................... 30
HIGH ALTITUDE DERATE .................................................................................................................................. 31
PROPANE GAS CONVERSION .......................................................................................................................... 31
GAS PIPING CONNECTIONS ............................................................................................................................ 31
PROPANE GAS TANKS AND PIPING .................................................................................................................. 34
CIRCULATING AIR & FILTERS ..................................................................................................................................... 34
DUCT WORK -AIR FLOW ................................................................................................................................34
CHECKING DUCT STATIC ................................................................................................................................. 35
BOTTOM RETURN AIR OPENING [UPFLOW MODELS] ........................................................................................... 35
FILTERS - READ THIS SECTION BEFORE INSTALLING THE RETURN AIR DUCT WORK .................................................. 36
UPRIGHT INSTALLATIONS ................................................................................................................................. 36
HORIZONTAL INSTALLATIONS ............................................................................................................................ 37
STARTUP PROCEDURE &ADJUSTMENT ......................................................................................................................... 37
HEAT ANTICIPATOR SETTING ............................................................................................................................. 37
DRAIN TRAP PRIMING ................................................................................................................................... 37
FURNACE OPERATION .................................................................................................................................... 37
GAS SUPPLY PRESSURE MEASUREMENT .......................................................................................................... 37
GAS MANIFOLD PRESSURE MEASUREMENT AND ADJUSTMENT ............................................................................... 39
GAS INPUT RATE MEASUREMENT (NATURAL GAS ONLY) ..................................................................................... 39
TEMPERATURE RISE...................................................................................................................................... 40
CIRCULATOR BLOWER SPEEDS........................................................................................................................ 40
BLOWER HEAT OFF DELAY TIMINGS ............................................................................................................... 42
COMFORTNET™ SYSTEM ........................................................................................................................................ 43
OVERVIEW .................................................................................................................................................. 43
AIRFLOW CONSIDERATIONS ............................................................................................................................. 43
FOSSIL FUEL APPLICATIONS ............................................................................................................................ 43
CTK0* WIRING .......................................................................................................................................... 44
COMFORTNET SYSTEM ADVANCED FEATURES ..................................................................................................... 44
FURNACE ADVANCED FEATURES MENUS ............................................................................................................ 45
THERMOSTATE .............................................................................................................................................. 47
DIAGNOSTICS ............................................................................................................................................... 47
NETWORK TROUBLESHOOTING .......................................................................................................................... 47
SYSTEM TROUBLESHOOTING ........................................................................................................................... 48
NORMAL SEQUENCE OF OPERATION ........................................................................................................................... 48
POWER UP................................................................................................................................................. 48
HEATING MODE ............................................................................................................................................ 48
COOLING MODE ........................................................................................................................................... 49
FAN ONLY MODE ......................................................................................................................................... 49
OPERATIONAL CHECKS ............................................................................................................................................ 49
SAFETY CIRCUIT DESCRIPTION................................................................................................................................... 50
INTEGRATED CONTROL MODULE ....................................................................................................................... 50
PRIMARY LIMIT ............................................................................................................................................ 50
AUXILIARY LIMIT ........................................................................................................................................... 50
ROLLOUT LIMIT ............................................................................................................................................ 50
PRESSURE SWITCHES .................................................................................................................................... 50
FLAME SENSOR ........................................................................................................................................... 50
TROUBLESHOOTING ................................................................................................................................................. 50
ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS ............................................................................................. 50
DIAGNOSTIC CHART....................................................................................................................................... 50
RESETTING FROM LOCKOUT ........................................................................................................................... 50
Table of Contents

4
G OODMAN  WILL  NOT  BE  RESPONSIBLE  FOR  ANY  INJURY  OR  PROPERTY 
DAMAGE  ARISING  FROM  IMPROPER  SERVICE  OR  SERVICE  PROCEDURES .
I
F  YOU  INSTALL  OR  PERFORM  SERVICE  ON  THIS  UNIT , YOU  ASSUME 
RESPONSIBILITY  FOR  ANY  PERSONAL  INJURY  OR  PROPERTY  DAMAGE 
WHICH  MAY  RESULT .M ANY  JURISDICTIONS  REQUIRE  A  LICENSE  TO 
INSTALL  OR  SERVICE  HEATING  AND  AIR  CONDITIONING  EQUIPMENT .
WARNING
Table of Contents
MAINTENANCE ........................................................................................................................................................ 51
ANNUAL INSPECTION ...................................................................................................................................... 51
FILTERS ...................................................................................................................................................... 51
BURNERS .................................................................................................................................................... 51
INDUCED DRAFT AND CIRCULATOR BLOWERS...................................................................................................... 51
CONDENSATE TRAP AND DRAIN SYSTEM (QUALIFIED SERVICER ONLY) .................................................................. 51
FLAME SENSOR (QUALIFIED SERVICER ONLY) .................................................................................................. 51
FLUE PASSAGES (QUALIFIED SERVICER ONLY) ................................................................................................. 52
BEFORE LEAVING AN INSTALLATION ............................................................................................................................. 52
REPAIR AND REPLACEMENT PARTS ............................................................................................................................ 52
DIP SWITCHES ....................................................................................................................................................... 53
TROUBLESHOOTING CHART ....................................................................................................................................... 54
*CVC9_AA,*MVC95_AA WIRING DIAGRAM ........................................................................................................... 60

5
T O  PREVENT  POSSIBLE  PROPERTY  DAMAGE , PERSONAL  INJURY  OR 
DEATH  DUE  TO  ELECTRICAL  SHOCK , THE  FURNACE  MUST  BE  LOCATED  TO 
PROTECT  THE  ELECTRICAL  COMPONENTS  FROM  WATER .
WARNING
CARBON MONOXIDE POISONING HAZARD
-
Special Warning for Installation of Furnace or Air Handling Units in
Enclosed Areas such as Garages, Utility Rooms or Parking Areas
Carbon monoxide producing devices (such as an automobile, space
heater, gas water heater, etc.) should not be operated in enclosed areas
such as unventilated garages, utility rooms or parking areas because of
the danger of carbon monoxide (CO) poisoning resulting from the exhaust
emissions. If a furnace or air handler is installed in an enclosed area such
as a garage, utility room or parking area and a carbon monoxide producing
device is operated therein, there must be adequate, direct outside
ventilation.
This ventilation is necessary to avoid the danger of CO poisoning which
can occur if a carbon monoxide producing device continues to operate in
the enclosed area. Carbon monoxide emissions can be (re)circulated
throughout the structure if the furnace or air handler is operating in any
mode.
CO can cause serious illness including permanent brain damage or death.
B10259-216
S HOULD  OVERHEATING  OCCUR  OR  THE  GAS  SUPPLY  FAIL  TO  SHUT  OFF ,
TURN  OFF  THE  MANUAL  GAS  SHUTOFF  VALVE  EXTERNAL  TO  THE 
FURNACE  BEFORE  TURNING  OFF  THE  ELECTRICAL  SUPPLY .
WARNING
P OSSIBLE  PROPERTY  DAMAGE , PERSONAL  INJURY  OR  DEATH  DUE  TO 
FIRE , EXPLOSION , SMOKE , SOOT , CONDENSATION , ELECTRICAL  SHOCK 
OR  CARBON  MONOXIDE  MAY  RESULT  FROM  IMPROPER  INSTALLATION ,
REPAIR  OPERATION , OR  MAINTENANCE  OF  THIS  PRODUCT .
WARNING
T O  PREVENT  PERSONAL  INJURY  OR  DEATH  DUE  TO  IMPROPER 
INSTALLATION , ADJUSTMENT , ALTERATION , SERVICE  OR  MAINTENANCE ,
REFER  TO  THIS  MANUAL .F OR  ADDITIONAL  ASSISTANCE  OR 
INFORMATION , CONSULT  A  QUALIFIED  INSTALLER , SERVICER  AGENCY  OR 
THE  GAS  SUPPLIER .
WARNING
I F  THE  INFORMATION  IN  THESE  INSTRUCTIONS  IS  NOT  FOLLOWED 
EXACTLY , A  FIRE  OR  EXPLOSION  MAY  RESULT  CAUSING  PROPERTY
DAMAGE
, PERSONAL  INJURY  OR  LOSS  OF  LIFE .
D O  NOT  STORE  OR  USE  GASOLINE  OR  OTHER  FLAMMABLE  VAPORS  AND 
LIQUIDS  IN  THE  VICINITY  OF  THIS  OR  ANY  OTHER  APPLIANCE .
D
O  NOT  TRY  TO  LIGHT  ANY  APPLIANCE .
D
O  NOT  TOUCH  ANY  ELECTRICAL  SWITCH ; DO  NOT  USE  ANY  PHONE 
IN  YOUR  BUILDING .
I
MMEDIATELY  CALL  YOUR  GAS  SUPPLIER  FROM  A  NEIGHBOR ’ S 
PHONE .F OLLOW  THE  GAS  SUPPLIER ’ S  INSTRUCTIONS .
I
F  YOU  CANNOT  REACH  YOUR  GAS  SUPPLIER , CALL  THE  FIRE 
DEPARTMENT .
I
NSTALLATION  AND  SERVICE  MUST  BE  PERFORMED  BY  A  QUALIFIED 
INSTALLER , SERVICE  AGENCY  OR  THE  GAS  SUPPLIER .
WHATTODOIFYOUSMELLGAS:




WARNING
T HIS  PRODUCT  CONTAINS  OR  PRODUCES  A  CHEMICAL  OR  CHEMICALS 
WHICH  MAY  CAUSE  SERIOUS  ILLNESS  OR  DEATH  AND  WHICH  ARE 
KNOWN  TO  THE S TATE  OF C ALIFORNIA  TO  CAUSE  CANCER , BIRTH 
DEFECTS  OR  OTHER  REPRODUCTIVE  HARM .
WARNING
H EATING  UNIT  SHOULD  NOT  BE  UTILIZED  WITHOUT  REASONABLE ,
ROUTINE , INSPECTION , MAINTENANCE  AND  SUPERVISION .I F  THE 
BUILDING  IN  WHICH  ANY  SUCH  DEVICE  IS  LOCATED  WILL  BE  VACANT ,
CARE  SHOULD  BE  TAKEN  THAT  SUCH  DEVICE  IS  ROUTINELY  INSPECTED ,
MAINTAINED  AND  MONITORED . IN  THE  EVENT  THAT  THE  BUILDING 
MAYBE  EXPOSED  TO  FREEZING  TEMPERATURES  AND  WILL  BE  VACANT ,
ALL  WATER ‐ BEARING  PIPES  SHOULD  BE  DRAINED , THE  BUILDING  SHOULD 
BE  PROPERLY  WINTERIZED , AND  THE  WATER  SOURCE  CLOSED . IN  THE 
EVENT  THAT  THE  BUILDING  MAY  BE  EXPOSED  TO  FREEZING 
TEMPERATURES  AND  WILL  BE  VACANT , ANY  HYDRONIC  COIL  UNITS 
SHOULD  BE  DRAINED  AS  WELL  AND , IN  SUCH  CASE , ALTERNATIVE  HEAT 
SOURCES  SHOULD  BE  UTILIZED .
WARNING
S AFETY P RECAUTIONS
Adhereto the followingwarningsand cautions wheninstalling,adjusting,altering,servicing, oroperatingthefurnace. Toensure
proper installation andoperation, thoroughly read this manualfor specifics pertaining tothe installation and application of this
product.

6
SHIPPINGINSPECTION
Allunitsaresecurelypackedin shipping containers tested ac-
cordingtoInternationalSafeTransitAssociationspecifications.
Thecartonmustbecheckeduponarrivalforexternaldamage. If
damage is found, a request for inspection by carrier’s agent
mustbemade in writingimmediately.
Thefurnacemustbecarefullyinspectedonarrivalfordamage
and bolts or screws which may have come loose in transit. In
theeventofdamagetheconsigneeshould:
1. Makeanotationondeliveryreceiptofanyvisibledamage
toshipmentorcontainer.
2. Notifycarrierpromptlyandrequestaninspection.
3. Withconcealeddamage,carriermustbenotifiedassoon
aspossible- preferablywithinfivedays.
4. Filetheclaimwiththefollowingsupportdocumentswithin
a nine month statute of limitations.
• Original or certified copy of the Bill of Lading, or
indemnitybond.
• Originalpaidfreightbillorindemnityinlieuthereof.
• Originalorcertifiedcopyoftheinvoice,showingtrade
andotherdiscountsorreductions.
• Copy of the inspection report issued by carrier’s
representativeatthetimedamageisreportedtocarrier.
Thecarrierisresponsibleformakingpromptinspectionofdam-
ageandforathoroughinvestigationofeachclaim.Thedistribu-
torormanufacturerwillnotacceptclaimsfromdealersfortrans-
portationdamage.
ELECTROSTATICDISCHARGE(ESD)PRECAUTIONS
NOTE: Dischargebody’sstaticelectricitybeforetouchingunit.
Anelectrostaticdischargecanadverselyaffectelectrical com-
ponents.
Use the following precautions during furnace installation and
servicingtoprotecttheintegratedcontrolmodulefromdamage.
Byputtingthefurnace,thecontrol,andthepersonatthesame
electrostaticpotential,thesestepswillhelpavoidexposingthe
integratedcontrol moduletoelectrostaticdischarge. This pro-
cedure is applicable to both installed and non-installed (un-
grounded)furnaces.
1. Disconnect all power to the furnace. Do not touch the
integratedcontrol module or anywire connectedto the
control prior to discharging your body’s electrostatic
chargetoground.
2. Firmly touch a clean, unpainted, metal surface of the
furnacesnear the control. Any toolsheld ina person’s
handduringgroundingwillbedischarged.
3. Service integratedcontrol moduleor connectingwiring
following the discharge process in step 2. Use caution
nottorechargeyourbodywith static electricity; (i.e., do
notmoveorshuffleyourfeet,donottouchungrounded
objects,etc.). Ifyoucomeincontactwithanungrounded
object,repeatstep2beforetouchingcontrolorwires.
4. Discharge your body to ground before removing a new
control from its container. Follow steps 1 through 3 if
installing the control on a furnace. Return any old or new
controlstotheircontainersbeforetouchinganyungrounded
object.
TOTHEINSTALLER
Before installing this unit, please read this manual thoroughly to
familiarizeyourselfwithspecificitemswhichmustbeadheredto,
including but not limited to: unit maximum external static pres-
sure, gas pressures, BTU input rating, proper electrical connec-
tions,circulatingairtemperaturerise,minimumormaximumCFM,
andmotorspeedconnections.
IMPORTANTNOTETOTHEOWNERREGARDINGPRODUCTWAR-
RANTY
Yourwarrantycertificateissuppliedasaseparatedocumentwith
the unit installed by your contractor. Read the limited warranty
certificate carefully to determine what is and is not covered and
keep the warranty certificate in a safe place. If you are unable to
locate the warranty certificate please contact your installing con-
tractor or contact customer service (877-254-4729) to obtain a
copy.
IMPORTANT: To receive the Lifetime Heat Exchanger Limited
Warranty (good for as long as you own your home) and the 10-
year Parts Limited Warranty, online registration must be com-
pleted within 60 days of installation. Online registration is not re-
quiredinCalifornia or Quebec. Complete warranty details are
availablefromyour local dealer or, for Goodman®brandprod-
ucts,visit www.goodmanmfg.comandforAmana®brand prod-
ucts,visit www.amana-hac.com.
ToregisteryourGoodman®brandunit,gotowww.goodmanmfg.com
and click “Warranty Registration”. Complete the registration
asprompted.
To register yourAmana®brand unit, go to www.amana-hac.com
andclickon “Warranty Registration”. Complete the registra-
tionasprompted.
Product limited warranty certificates for models currently in pro-
ductioncanbeviewedatwww.goodmanmfg.comorwww.amana-
hac.com. If your model is not currently in production or does not
appearonthewebsite,pleasecontactyourinstallingcontractoror
contact customer service at (877-254-4729) to obtain a copy of
yourwarrantycertificate.
EachproductoverviewpagecontainsaProductWarrantylink;by
clickingonityouwillbeabletoviewthelimitedwarrantycoverage
forthatspecificproduct.Toviewwarrantyregistrationinformation,
clickontheProduct Warranty text on the leftnavigationpanelon
thehomepageofeachwebsite.TheOnlineProductRegistration
pages are located in this same section.

7
T O  PREVENT  PROPERTY  DAMAGE , PERSONAL  INJURY  OR  DEATH  DUE  TO 
FIRE , DO  NOT  INSTALL  THIS  FURNACE  IN  A  MOBILE  HOME , TRAILER , OR 
RECREATIONAL  VEHICLE .
WARNING
P RODUCT D ESCRIPTION
FEATURES
ThisfurnaceisapartoftheComfortNet™familyofproducts.The
CTK0*ComfortNetthermostatkitallowsthisfurnacetobeinstalled
aspartofadigitallycommunicatingsystem.TheComfortNetsys-
temprovidesautomaticairflowconfiguration,enhancedsetupfea-
tures, and enhanced diagnostics. It also reduces the number of
thermostatwirestoamaximumoffour.Itmaybealsoinstalledas
part of a non-communicating system using a standard 24 VAC
thermostat.
ThisproductmaybeinstalledwiththeComfortNetthermostatand
a non-ComfortNet compatible single stage air conditioning unit.
However, this reduces the benefits of the ComfortNet system as
theenhancements will onlyapplytothe furnace.
P RODUCT A PPLICATION
Thisfurnaceisprimarilydesignedforresidentialhome-heatingap-
plications. ItisNOTdesignedorcertifiedforuseinmobilehomes,
trailersorrecreational vehicles. Neither is it designed orcertified
for outdoor applications. The furnace must be installed indoors
(i.e.,atticspace,crawlspace,orgarageareaprovidedthegarage
areaisenclosedwithanoperatingdoor).
Thisfurnacecanbeusedinthefollowingnon-industrialcommer-
cialapplications:
Schools,Office buildings, Churches, Retail stores,
Nursinghomes,Hotels/motels,Commonor office areas
Insuchapplications,thefurnacemustbeinstalledwiththefollow-
ing stipulations:
• It must be installed per the installation instructions
providedandperlocalandnationalcodes.
• It must be installed indoors in a building constructed on
site.
• Itmustbepartofaductedsystemandnotusedinafree
airdeliveryapplication.
• It must not be used as a “make-up” air unit.
• Itmustbeinstalledwithtwo-pipesystemsforcombustion
air,especiallyifVOC’sorothercontaminantsarepresent
intheconditionedspace.
• AllotherwarrantyexclusionsandrestrictionsapplyThis
furnace is an ETL dual-certified appliance and is
appropriateforusewithnaturalorpropanegas(NOTE: If
usingpropane,apropaneconversionkitisrequired).
Dual certification means that the combustion air inlet pipe is op-
tionalandthefurnacecanbeventedasa:
Non-directvent(singlepipe)centralforcedairfurnacein
whichcombustion air is takenfromthe installation area
orfromairductedfromtheoutsideor,
Directvent(dualpipe)centralforcedairfurnace inwhich
allcombustionairsupplieddirectlytothefurnaceburners
through a special air intake system outlined in these
instructions.
This furnace may be used as a construction site heater ONLY if
allofthefollowingconditionsaremet:
• The vent system is permanently installed per these
installationinstructions.
• Aroomthermostatisusedtocontrolthefurnace. Fixed
jumpers that provide continuous heating CANNOT be
usedandcancauselongtermequipmentdamage.
• Returnairductsareprovidedandsealedtothefurnace.
• Areturnairtemperaturerangebetween60ºF(16ºC)and
80ºF(27ºC)ismaintained.
• Airfiltersareinstalledinthesystemandmaintainedduring
constructionreplacedasappropriateduringconstruction,
anduponcompletionofconstruction.
• Theinputrateandtemperaturerisearesetperthefurnace
ratingplate.
• 100% outside air is provided for combustion air
requirementsduringconstruction.Temporaryductingcan
beused.
NOTE:Donotconnectthetemporaryductdirectlytothe
furnace.Theductmustbesizedforadequatecombustion
and ventilation in accordance with the latest edition of
the National Fuel Gas Code NFPA54/ANSI Z223.1 or
CAN/CSAB149.1InstallationCodes.
•Thefurnaceheatexchanger,components,ductsystem,
air filters and evaporator coils are thoroughly cleaned
followingfinalconstructioncleanup.
• Allfurnaceoperatingconditions(includingignition,input
rate,temperatureriseandventing)areverifiedaccording
to these installation instructions.
NOTE: TheCommonwealthofMassachusettsrequiresthatthe
followingadditionalrequirementsmustalsobemet:
• Gasfurnacesmustbeinstalledbyalicensedplumberor
gasfitter.
• AT-handle gas cock must be used.
• Iftheunitistobeinstalledinanattic,thepassagewayto
andtheserviceareaaroundtheunitmusthaveflooring.
To ensure proper furnace operation, install, operate and
maintain the furnace in accordance with these installation
and operation instructions, all local building codes and or-
dinances. In their absence, follow the latest edition of the Na-
tionalFuelGasCode(NFPA54/ANSIZ223.1),and/orCAN/CSA
B149 Installation Codes, local plumbing or waste water codes,
andotherapplicablecodes.

8
AcopyoftheNationalFuelGasCode(NFPA54/ANSIZ223.1)
canbeobtainedfromanyofthefollowing:
American National Standards Institute
1430Broadway
NewYork, NY 10018
NationalFireProtectionAssociation
1Batterymarch Park
Quincy, MA 02269
CSA International
8501 East Pleasant Valley
Cleveland,OH44131
Theratedheatingcapacityofthefurnaceshouldbegreaterthanor
equaltothetotalheatlossoftheareatobeheated. Thetotalheat
loss should be calculated by an approved method or in accor-
dancewith“ASHRAEGuide”or“ManualJ-LoadCalculations”pub-
lishedbytheAirConditioningContractorsofAmerica.
Acopyofthe CAN/CSAB149InstallationCodescan alsobe
obtainedfrom:
CSA International
178RexdaleBoulevard
Etobicoke,Ontario,CanadaM9W1R3
L OCATION R EQUIREMENTS &C ONSIDERATIONS
Followtheinstructionslistedbelowandtheguidelinesprovidedin
the Combustion and Ventilation Air Requirements section when
selectingafurnacelocation.
T O  PREVENT  POSSIBLE  EQUIPMENT  DAMAGE , PROPERTY  DAMAGE ,
PERSONAL  INJURY  OR  DEATH , THE  FOLLOWING  BULLET  POINTS  MUST  BE 
OBSERVED  WHEN  INSTALLING  THIS  UNIT .
WARNING
P OSSIBLE  PROPERTY  DAMAGE , PERSONAL  INJURY  OR  DEATH  DUE  TO 
FIRE , EXPLOSION , SMOKE , SOOT , CONDENSATION , ELECTRICAL  SHOCK 
OR  CARBON  MONOXIDE  MAY  RESULT  FROM  IMPROPER  INSTALLATION ,
REPAIR  OPERATION , OR  MAINTENANCE  OF  THIS  PRODUCT .
WARNING
• Centrallylocatethefurnacewithrespecttotheproposed
or existing air distribution system.
• Ensure the temperature of the return air entering the
furnaceisbetween55°Fand100°Fwhenthefurnaceis
heating.
• Provide provisions for venting combustion products
outdoors through a proper venting system. Special
consideration should be given to vent/flue pipe routing
andcombustionairintakepipewhenapplicable. Refer
toVent/FluePipeandCombustionAirPipe-Termination
Locations for appropriate termination locations and to
determineifthepipingsystemfromfurnacetotermination
canbeaccomplishedwithintheguidelinesgiven. NOTE:
Thelengthofflueand/orcombustionairpipingcanbea
limitingfactor inthelocation ofthefurnace.
• Locate the furnace so condensate flows downwards to
the drain. Do not locate the furnace or its condensate
drainage system in any area subject to below freezing
temperatureswithoutproperfreezeprotection.Referto
CondensateDrainLinesandTrapforfurtherdetails.
• Ensure adequate combustion air is available for the
furnace. Improper or insufficient combustion air can
exposebuildingoccupantstogascombustionproducts
that could include carbon monoxide. Refer to
CombustionandVentilationAirRequirements.
• Set the furnace on a level floor to enable proper
condensatedrainage. Ifthefloorbecomeswetordamp
attimes,placethefurnaceabovetheflooronaconcrete
basesizedapproximately1-1/2"largerthanthebaseof
the furnace. Refer to the Horizontal Applications and
Considerationsforlevelingofhorizontalfurnaces.
• Ensure upflow or horizontal furnaces are not installed
directlyoncarpeting,oranyothercombustiblematerial.
Theonlycombustiblematerialallowediswood.
• A special accessory subbase must be used for upright
counterflow unit installations over any combustible
material(includingwood). Refertosubbaseinstructions
for installation details. (NOTE: A subbase will not be
requiredifanairconditioningcoilislocatedbeneaththe
furnace between the supply air opening and the
combustiblefloor.
• Exposure to contaminated combustion air will result in
safetyandperformance-relatedproblems. Donotinstall
thefurnace where the combustion air isexposed tothe
followingsubstances:
permanentwavesolutions
chlorinatedwaxesorcleaners
chlorine-basedswimmingpoolchemicals
watersofteningchemicals
deicing salts or chemicals
carbontetrachloride
halogentyperefrigerants
cleaningsolutions(suchasperchloroethylene)
printinginks
paintremovers
varnishes
hydrochloricacid
cementsand glues
antistaticfabricsoftenersforclothesdryers
andmasonryacidwashingmaterials
• Sealoffanon-directventfurnaceifitisinstallednearan
area frequently contaminated by any of the above
substances. This protects the non-direct vent furnace
from airborne contaminants. To ensure that the
enclosednon-directventfurnacehasanadequatesupply
of combustion air, vent from a nearby uncontaminated
room or from outdoors. Refer to the Combustion and
VentilationAirRequirementsfordetails.

9
• If the furnace is used in connection with a cooling coil
unit, install the furnace upstream or in parallel with the
cooling coil unit. Premature heat exchanger failure will
resultifthe cooling unitisplacedaheadof the furnace.
• Ifthefurnaceisinstalledinaresidentialgarage,position
the furnace so that the burners and ignition source are
located not less than 18 inches (457 mm) above the
floor. Protect the furnace from physical damage by
vehicles.
• Ifthefurnaceisinstalledhorizontally,ensuretheaccess
doorsarenotonthe“up/top”or“down/bottom”sideofthe
furnace.
• Donotconnectthisfurnacetoachimneyfluethatserves
aseparateappliancedesignedtoburnsolidfuel.
• OnCounterflowInstallations,theairconditioningcoilmust
bedownstreamonthesupply(positive)sideofthefurnace
heatexchanger.
•Counterflow Installation over a noncombustible floor.
Beforesettingthefurnaceovertheplenumopening,ensure
the surface around the opening is smooth and level.A
tightsealshouldbemadebetweenthefurnacebaseand
floor by using a silicone rubber caulking compound or
cementgrout.
•Counterflow Installation over a combustible floor. If
installationoveracombustiblefloorbecomesnecessary,
use an accessory subbase (see Specification Sheet
applicableforyourmodelfordetails.) Aspecialaccessory
subbase must be used for upright counterflow unit
installationsoveranycombustiblematerialincludingwood.
Refertosubbaseinstructionsforinstallationdetails.Follow
theinstructionswith the subbaseforproperinstallation.
Do not install the furnace directly on carpeting, tile, or
other combustible material other than wood flooring.
(NOTE: The subbase will not be required if an air
conditioning coil is installed between the supply air
openingonthefurnaceandthefloor.)
CLEARANCESANDACCESSIBILITY
Installationsmustadheretotheclearancestocombustiblemate-
rialstowhichthisfurnacehasbeendesigncertified. Theminimum
clearanceinformationforthisfurnaceisprovidedontheunit’sclear-
ancelabel. These clearancesmustbe permanentlymaintained.
Clearancesmustalsoaccommodateaninstallation’sgas,electri-
cal, and drain trap and drain line connections. If the alternate
combustionairintakeorvent/flueconnectionsareusedadditional
clearancemustbeprovidedtoaccommodatetheseconnections.
RefertoVent/FluePipeandCombustionAirPipefordetails. NOTE:
Inadditiontotherequiredclearancestocombustiblematerials,a
minimumof24inchesserviceclearancemustbeavailableinfront
of the unit.
TOP
BOTTOM
SIDE SIDE SIDE
TOP
BOTTOM
Upflow Counterflow Horizontal
A furnace installed in a confined space (i.e., a closet or utility
room) must have two ventilation openings with a total minimum
freeareaof0.25squareinchesper1,000BTU/hroffurnaceinput
rating. Refer to Specification Sheet applicable to your model for
minimumclearancestocombustiblesurfaces. Oneoftheventila-
tionopeningsmustbewithin12inchesofthetop;theotheropen-
ingmustbewithin12inchesofthebottomoftheconfinedspace.
Inatypicalconstruction,theclearancebetweenthedooranddoor
frameisusually adequatetosatisfythisventilationrequirement.
FURNACESUSPENSION
Ifsuspendingthefurnacefromraftersorjoists,use3/8"threaded
rodand 2”x2”x1/8” angle iron as shownin thefollowing diagram.
Thelengthofrodwilldependontheapplicationandtheclearances
necessary.
2" 2" 3/8" ANGLE IRON
(3 PLACES )
XX
EXISTINGFURNACEREMOVAL
NOTE:Whenanexistingfurnaceisremovedfromaventingsys-
temservingotherappliances,theventingsystemmaybetoolarge
toproperlyventtheremainingattachedappliances.
ThefollowingventtestingprocedureisreproducedfromtheAmeri-
canNationalStandard/NationalStandardofCanadaforGas-
Fired Central Furnaces ANSI Z21.4, CSA-2.3 latest edition
Section 1.23.1.
The following steps shall be followed with each appliance con-
nected to the venting system placed in operation, while any
other appliances connected to the venting system are not in
operation:
1. Seal anyunusedopeningsintheventingsystem.

10
• Concealedhotorcoldwater pipes, or chimneys.
• Unconditioned areas behind the thermostat, such as
anoutsidewall.
Consultthe instructionspackagedwiththe thermostatfor
mountinginstructionsandfurtherprecautions.
C OMBUSTION &V ENTILATION A IR R EQUIREMENTS
T O  AVOID  PROPERTY  DAMAGE , PERSONAL  INJURY  OR  DEATH ,
SUFFICIENT  FRESH  AIR  FOR  PROPER  COMBUSTION  AND  VENTILATION  OF 
FLUE  GASES  MUST  BE  SUPPLIED .M OST  HOMES  REQUIRE  OUTSIDE  AIR  BE 
SUPPLIED  INTO  THE  FURNACE  AREA .
WARNING
Improvedconstructionandadditionalinsulationinbuildingshave
reducedheatlossbyreducingairinfiltrationandescapearound
doors and windows. These changes have helped in reducing
heating/coolingcostsbuthavecreatedaproblemsupplyingcom-
bustion and ventilation air for gas fired and other fuel burning
appliances. Appliances that pull air out of the house (clothes
dryers, exhaust fans, fireplaces, etc.) increase the problem by
starvingappliancesforair.
Housedepressurizationcancausebackdraftingorimpropercom-
bustionofgas-firedappliances,therebyexposingbuildingoccu-
pantstogascombustionproductsthatcouldincludecarbonmon-
oxide.
Ifthisfurnaceistobeinstalledinthesamespacewithothergas
appliances,suchasawaterheater,ensurethereisanadequate
supplyofcombustionandventilationairfortheotherappliances.
Refer to the latest edition of the National Fuel Gas Code NFPA
54/ANSIZ223.1orCAN/CSA B149 Installation Codes or appli-
cable provisions of the local building codes for determining the
combustionairrequirementsfortheappliances.
Most homes will require outside air be supplied to the furnace
area by means of ventilation grilles or ducts connecting directly
totheoutdoorsorspacesopentotheoutdoorssuchas atticsor
crawl spaces.
I NSTALLATION P OSITIONS
Thisfurnacemaybeinstalledinanuprightpositionorhorizontal
oneithertheleftorrightsidepanel. Donotinstallthisfurnaceon
itsback. Foruprightupflowfurnaces,returnairductworkmaybe
attached to the side panel(s) and/or basepan. For horizontal
upflow furnaces, return air ductwork must be attached to the
basepan. For both upright or horizontal counterflow furnaces,
returnductworkmustbeattachedtothebasepan(topendofthe
blowercompartment). NOTE: Ductworkmustneverbeattached
to the back of the furnace. Contact your distributor for proper
airflowrequirementsandnumberofrequiredductworkconnec-
tions. Referto “Recommended InstallationPositions”figurefor
appropriateinstallationpositions,ductworkconnections,andre-
sultingairflowarrangements.
2. Inspecttheventingsystem for proper size and horizon-
tal pitch, as required by the National Fuel Gas Code,
ANSIZ223.1 or the Natural Gasand PropaneInstalla-
tionCode,CSA B149.1-05 and these instructions. De-
termine that there is no blockage or restriction, leak-
age,corrosionandotherdeficiencieswhichcouldcause
anunsafecondition.
3. As far as practical, close all building doors and win-
dows and all doors between the space in which the
appliance(s) connected to the venting system are lo-
cated and other spaces of the building.
4. Closefireplacedampers.
5. Turnonclothesdryersandanyappliance notconnected
to the venting system. Turn on any exhaust fans, such
as range hoods and bathroom exhausts, so they shall
operateatmaximum speed. Do not operate a summer
exhaustfan.
6. Followthelightinginstructions.Placetheappliancebeing
inspectedinoperation.Adjust thermostatso appliance
shalloperatecontinuously.
7. Testfor spillage from drafthood appliances at the draft
hood relief opening after 5 minutes of main burner op-
eration. Use the flame of a match or candle.
8. Ifimproperventingis observed during any of the above
tests, the venting system must be corrected in accor-
dance with the National Fuel Gas CodeANSI Z223.1/
NFPA54and/orNationalGasandPropaneInstallation
CodeCSA B149.1-05.
9. After it has been determined that each appliance con-
nectedtotheventingsystemproperly ventswhentested
asoutlined above,returndoors, windows,exhaustfans,
fireplacedampersand any othergasburningappliance
totheirprevious conditions of use.
If resizing is required on any portion of the venting system, use
the appropriate table inAppendix G in the latest edition of the
National Fuel Gas Code ANSI Z223.1 and/or CSA B149.1-05
InstallationCodes.
THERMOSTATLOCATION
Thethermostatshouldbeplacedapproximatelyfivefeetfromthe
floor on a vibration-free, inside wall in an area having good air
circulation. Do not install the thermostat where it may be influ-
encedbyanyofthefollowing:
• Drafts,ordeadspotsbehinddoors,incorners,orunder
cabinets.
• Hotor cold airfromregisters.
• Radiantheatfromthesun.
• Lightfixturesorotherappliances.
• Radiantheatfromafireplace.

11
H ORIZONTAL A PPLICATIONS &C ONSIDERATIONS
Horizontal applications, in particular, may dictate many of the
installation’sspecificssuchasairflowdirection,ductworkconnec-
tions, flue and combustion air pipe connections, etc. The basic
applicationofthisfurnaceasahorizontalfurnacediffersonlyslightly
fromanuprightinstallation. Wheninstallingafurnacehorizontally,
additionalconsiderationmustbegiventothefollowing:
ALTERNATE VENT/FLUE
AND COMBUSTION AIR
INTAKE LOCATIONS
FURNACE MUST BE LEVEL
FROM END TO END
FURNACE MUST BE LEVEL
OR SLIGHTLY TILTED FORWARD
WITH THE DOORS 0" - 3/4"
BELOW THE BACK PANEL
DRAIN LINE WITH 1/4" PER FOOT
DOWNWARD SLOPE
36" MINIMUM SERVICE
CLEARANCE REQUIRED
FURNACE MUST BE SUPPORTED
AT BOTH ENDS AND MIDDLE
DRAIN PAN
GAS LINE WITH
DRIP LEG (3" MINIMUM)
4 3/4" MINIMUM
DRAIN TRAP
CLEARANCE
HorizontalFurnace
DRAINTRAPANDLINES
Inhorizontalapplicationsthe condensatedraintrapissecured to
the furnace side panel, suspending it below the furnace. Amini-
mum clearance of 4 3/4 inches below the furnace must be pro-
vided for the drain trap. Additionally, the appropriate downward
piping slope must be maintained from the drain trap to the drain
location.RefertoCondensateDrainTrapandLinesforfurtherde-
tails.Ifthedraintrapanddrainlinewillbeexposedtotemperatures
nearorbelowfreezing,adequatemeasuresmustbetakentopre-
ventcondensatefromfreezing.
LEVELING
Leveling ensures proper condensate drainage from the heat ex-
changerandinduceddraftblower. Forproperfluepipedrainage,
thefurnacemustbelevellengthwisefromendtoend. Thefurnace
shouldalso belevelfromback tofrontorhave aslighttilt withthe
access doors downhill (approximately 3/4 inches) from the back
panel. Theslighttilt allowstheheatexchangercondensate,gen-
eratedintherecuperatorcoil,toflowforwardtotherecuperatorcoil
frontcover.
ALTERNATEVENT/FLUEANDCOMBUSTIONAIRCONNECTIONS
Inhorizontalinstallationsprovisionsforalternateflueandcombus-
tionairpipingareavailableforupflowfurnaceswithleftdischarge
andcounterflowfurnaceswithrightairdischarge. Thisconfigura-
tion allows the flue and combustion air piping to be run vertically
throughthesideof the furnace. Refer to the “Recommended In-
stallation Positions” figure for further detail. The standard piping
connections mayalso be used inthese positions. Refer to Vent/
Flue Pipe and Combustion Air Pipe for details concerning the
conversionto the alternatevent/flueand combustion airconnec-
tions.
Whenusingthehorizontalalternateventconfiguration,youmust
usetheRF000142ventdrainkit.Seefollowingillustration.
NOTE: MAKE SMALL
LOOP IN HOSE TO
SERVE AS “P-TRAP”
VENT-DRAIN
“FIELD-SUPPLIED DRAIN
HOSE”
“FIELD-
SUPPLIED CONNECTOR”
FROM VENT-
DRAIN CONNECTED TO
CONDENSATE DRAIN
LINE WITH
AlternateVent/FlueLocation
RecommendedInstallationPositions
NOTE: Alternate “vertical” piping connections can not be used
whenanupflowfurnaceisinstalledwithsupplyairdischarging to
theright,orwhenacounterflowfurnaceisinstalledwithsupplyair
discharging to the left. In either case, use the standard flue and
combustionairpipingconnections.

12
ALTERNATEELECTRICALANDGASLINECONNECTIONS
Thisfurnacehasprovisionsallowingforelectricalandgaslinecon-
nectionsthrougheitherside panel. In horizontal applications the
connections can be made either through the “top” or “bottom” of
thefurnace.
DRAINPAN
A drain pan must be provided if the furnace is installed above a
conditionedarea. Thedrainpanmustcovertheentireareaunder
thefurnace(andairconditioningcoilifapplicable).
FREEZEPROTECTION
Refer to HorizontalApplications andConditions - Drain Trap and
Lines.
FURNACESUSPENSION
If the furnace is installed in a crawl space it must be suspended
from the floor joist or supported by a concrete pad. Never install
thefurnaceonthegroundorallowittobeexposedtowater. Refer
toLocationRequirementsandConsiderations-FurnaceSuspen-
sionforfurtherdetails.
P ROPANE G AS /H IGH A LTITUDE I NSTALLATIONS
WARNING
P OSSIBLE  PROPERTY  DAMAGE , PERSONAL  INJURY  OR  DEATH  MAY 
OCCUR  IF  THE  CORRECT  CONVERSION  KITS  ARE  NOT  INSTALLED .T HE 
APPROPRIATE  KITS  MUST  BE  APPLIED  TO  ENSURE  SAFE  AND  PROPER 
FURNACE  OPERATION .A LL  CONVERSIONS  MUST  BE  PERFORMED  BY  A 
QUALIFIED  INSTALLER  OR  SERVICE  AGENCY .
Thisfurnaceisshippedfromthefactoryconfiguredfornaturalgas
at standard altitude. Propane gas installations require an orifice
and orifice change to compensate for the energy content differ-
encebetweennaturalandpropanegas.
Highaltitudeinstallationsmayrequirebothapressureswitchand
anorifice/springchange. Thesechangesarenecessarytocom-
pensateforthenaturalreductioninthedensityofboththegasfuel
andthecombustionairathigheraltitude.
Forinstallationsabove7000feet,pleaserefertothefurnaceSpeci-
ficationSheetsforrequiredkit(s).
High
Stage Low Stage
Natural None #43 3.5" w.c. 1.9" w.c. None
Propane LPM-06* 1#55 10.0" w.c. 6.0" w.c. None
1LPM-06* supports both Honeywell and White-Rodgers 2-stage valves
Orifice
NOTE: In Canada, gas furnaces are only certified to 4500 feet.
Gas
0-7000
Manifold Pressure Pressure
Switch Change
Altitude Kit
Contact the distributor for a tabular listing of appropriate
manufacturer’s kits for propane gas and/or high altitude installa-
tions. The indicated kits must be used to insure safe and proper
furnaceoperation. Allconversionsmustbeperformedbyaquali-
fiedinstaller,orserviceagency.
V ENT /F LUE P IPE &C OMBUSTION A IR P IPE
F AILURE  TO  FOLLOW  THESE  INSTRUCTIONS  CAN  RESULT  IN  BODILY 
INJURY  OR  DEATH .C AREFULLY  READ  AND  FOLLOW  ALL  INSTRUCTIONS 
GIVEN  IN  THIS  SECTION .
WARNING
U PON  COMPLETION  OF  THE  FURNACE  INSTALLATION , CAREFULLY 
INSPECT  THE  ENTIRE  FLUE  SYSTEM  BOTH  INSIDE  AND  OUTSIDE  OF  THE 
FURNACE  TO  ASSURE  IT  IS  PROPERLY  SEALED .L EAKS  IN  THE  FLUE 
SYSTEM  CAN  RESULT  IN  SERIOUS  PERSONAL  INJURY  OR  DEATH  DUE  TO 
EXPOSURE  TO  FLUE  PRODUCTS , INCLUDING  CARBON  MONOXIDE .
WARNING
Acondensinggasfurnaceachieves its high level of efficiency by
extractingalmost all of the heatfrom theproducts ofcombustion
and cooling them to the point where condensation takes place.
Becauseoftherelativelylowfluegastemperatureandwatercon-
densationrequirements,PVCpipeisusedasventingmaterial.
This furnace must not be connected to Type B, BW, or Lvent or
ventconnector,and must not be vented into any portion of afac-
torybuiltormasonrychimneyexceptwhenusedasapathwayfor
PVC as described later in this section. Never common vent this
appliancewithanotherapplianceoruseaventwhichisusedbya
solid fuel appliance. Do not use commercially available “no hub
connectors”otherthanthose shippedwiththisproduct.
It is the responsibility of the installer to follow the manufacturers’
recommendationsandtoverifythatallvent/fluepipingandconnec-
tors are compatible with furnace flue products. Additionally, it is
theresponsibility of theinstallertoensure that allpipingandcon-
nectionspossessadequatestructuralintegrityandsupporttopre-
ventfluepipeseparation,shifting,orsaggingduringfurnaceopera-
tion.
DUALCERTIFICATION:NON-DIRECT/DIRECTVENT
Thisfurnaceisdualcertifiedandmaybeinstalledasanon-direct
vent(singlepipe)ordirectvent(dualpipe)appliance. Anon-direct
vent installationrequires only a vent/fluepipe,while a direct vent
installation requires both a vent/flue pipe and a combustion air
intakepipe. Refertotheappropriatesectionfordetailsconcerning
piping size, length, number of elbows, furnace connections, and
terminations.

13
T O  AVOID  BODILY  INJURY , FIRE  OR  EXPLOSION , SOLVENT  CEMENTS 
MUST  BE  KEPT  AWAY  FROM  ALL  IGNITION  SOURCES ( I . E ., SPARKS , OPEN 
FLAMES , AND  EXCESSIVE  HEAT ) AS  THEY  ARE  COMBUSTIBLE  LIQUIDS .
A
VOID  BREATHING  CEMENT  VAPORS  OR  CONTACT  WITH  SKIN  AND / OR 
EYES .
WARNING
Two-orthree-inchnominaldiameterPVCSchedule40pipemeet-
ing ASTM D1785, PVC primer meeting ASTM F656, and PVC
solventcementmeetingASTMD2564specificationsmustbeused.
Fittings must be DWV type fittings meeting ASTM D2665 and
ASTM D3311. Carefully follow the pipe manufacturer’s instruc-
tionsforcutting,cleaning, andsolventcementingofPVC.
The use of Schedule 40 PVC Cellular Core (Foam Core) plastic
pipe is also acceptable as a flue/vent and intake pipe material.
PVCprimermeetingASTMF656andPVCsolventcementmeet-
ingASTM D2564 specifications must be used. Fittings must be
DWVtypefittingsmeetingASTMD2665andASTMD3311.Care-
fullyfollowthemanufacturesinstructionsforcutting,cleaningand
solventcementingofPVC.
MATERIALSANDJOININGMETHODS
AsanalternativetoPVCpipe,primer,solventcement,andfittings,
ABSmaterialswhichareincompliancewiththefollowingspecifi-
cations may be used. Two-or-three-inchABS Schedule 40 pipe
must meetASTM D1527 and, if used in Canada, must be CSA
listed. Solvent cement for ABS to ABS joints must meetASTM
D2235 and, if used in Canada, must be CSA listed. The solvent
cementforthePVCtoABStransitionjointmustmeetASTMD3138.
Fittings must be DWV type fittings meeting ASTM D2661 and
ASTMD3311and, ifusedinCanada, mustbeCSAlisted. Care-
fully follow the manufacturers’ instructions for cutting, cleaning,
andsolventcementingPVCand/orABS.
All 90° elbows must be medium radius (1/4 bend DWV) or long
radius (Long sweep 1/4 bend DWV) types conforming toASTM
D3311. Amedium radius(1/4 bend DWV) elbow measures 31/
16”minimumfromtheplaneofoneopeningtothecenterlineofthe
other opening for 2” diameter pipe, and 4 9/16” minimum for 3”
pipe.
PROPERVENT/FLUEANDCOMBUSTIONAIRPIPINGPRACTICES
Adhere to these instructions to ensure safe and proper furnace
performance.Thelength,diameter, andnumberofelbowsofthe
vent/flue pipe and combustion air pipe (when applicable) affects
the performance of the furnace and must be carefully sized. All
pipingmustbeinstalledinaccordancewithlocalcodesandthese
instructions.
Some models require the use of 3” pipe. Do not transition
from a 2” to 3” pipe in a horizontal section of pipe as this may
createa water trap.
Pipingmustbeadequatelysecuredandsupportedtoprohibitsag-
ging,jointseparation,and/ordetachmentfromthefurnace. Hori-
zontalrunsofvent/fluepipingmustbesupportedeverythreetofive
feetandmustmaintaina1/4inch perfootdownward slope,back
towardsthefurnace,toproperlyreturncondensatetothefurnace’s
drain system. Allowances should be made for minor expansion
and contraction due to temperature variations. For this reason,
particularcaremust betakentosecurepiping when alongrunis
followedbyashortoffsetoflessthan40inches.
Precautionsshouldbetakentopreventcondensatefromfreezing
insidethevent/fluepipeand/oratthevent/fluepipetermination. All
vent/fluepipingexposedtofreezingtemperaturesbelow35°Ffor
extendedperiodsoftimemustbeinsulatedwith1/2”thickclosed
cellfoam. Alsoallvent/fluepipingexposedoutdoorsinexcessof
theterminationsshowninthismanual(orinunheatedareas)must
be insulated with 1/2” thick closed cell foam. Inspect piping for
leaksprior to installing insulation.
TERMINATIONLOCATIONS
NOTE: RefertoLocationRequirementsandConsiderations for
combustionaircontaminantrestrictions.
The following bullets and diagram describe the restrictions con-
cerningtheappropriatelocationofvent/fluepipeandcombustion
airintakepipe(whenapplicable)terminations. RefertoNon-Direct
Vent (Single Pipe) Piping and Direct Vent (Dual Pipe) Piping lo-
cated in this section for specific details on termination construc-
tion.
• All terminations (flue and/or intake) must be located at
least12inchesabovegroundlevelortheanticipatedsnow
level.
• Vent terminations (non-direct and direct vent) must
terminateatleast3feetaboveanyforcedairinletlocated
within10feet.
NOTE: Thisprovisiondoesnotapplytothecombustion
airintaketerminationofadirectventapplication.
• Theventterminationofanon-directventapplicationmust
terminate at least 4 feet below, 4 feet horizontally from,
or1 footaboveany door,window,orgravityairinletinto
anybuilding.
• The vent termination of a direct vent application must
terminate at least 12 inches from any opening through
whichfluegasesmayenterabuilding(door,window,or
gravityairinlet).
• Theventterminationofventpiperunverticallythrougha
roofmustterminateatleast12inchesabovetheroofline
(ortheanticipatedsnowlevel)andbeatleast12inches
from any vertical wall (including any anticipated snow
buildup).
• Aventterminationshallnotterminateoverpublicwalkways
oroveranareawherecondensateorvaporcouldcreate
a nuisance or hazard or could be detrimental to the
operationofregulators,reliefvalves,orotherequipment.
• The combustion air intake termination of a direct vent
application should not terminate in an area which is
frequentlydustyordirty.

14
vicing.CombustionAirandVentpipingshouldberoutedinaman-
nertoavoidcontactwithrefrigerantlines,meteringdevices,con-
densate drain lines, etc. If necessary, clearances may be in-
creasedby utilizing two45deg. Long-Sweep Elbowsandcreat-
ing an “S” joint to provide additional space at connection loca-
tions. This joint can be rotated on the fitting to establish maxi-
mumclearancebetweenrefrigerantlines,meteringdevices,and
condensatedrainlines,etc. Thisjointistheequivalentofone90
deg.elbowwhenconsideringelbowcount.
45 DEGREE
LONG-SWEEP
ELBOWS
V
E
N
T
IncreasedClearanceConfiguration
NOTE: Donotuseothercommerciallyavailable“nohubconnec-
tors”duetopossiblematerialconflicts. Thevent/fluepipecanalso
be secured using a PVC or ABS elbow or coupling using the
appropriateglue(seeMaterialsandJoiningMethods).
NOTE: For non-direct vent installations, a minimum of one 90°
elbowshouldbeinstalledonthecombustionairintakecouplingto
guardagainstinadvertentblockage.
COMBUSTION AIR PIPE
DIRECTVENTINSTALLATIONS
Onupflow unitssecure the combustionairintakepipe directlyto
theairintakecoupling. Oncounterflowunitssecurethecombus-
tionairintakepipetotheairintakecouplingusingtherubbercou-
plingandwormgearhoseclampsprovidedwiththeunit.Thecoun-
terflowrubbercouplingallowsserviceremovalofairintakepiping
internalto the furnace blowercompartment. NOTE: Because of
probable material conflicts, do not use other commercially avail-
able “no hub connectors”. The combustion air intake pipe can
also be secured directly to the counterflow unit air intake pipe
coupling.
NON-DIRECTVENTINSTALLATIONS
Aminimum of one90°elbowshould be installedonthecombus-
tionairintake“coupling”toguardagainstinadvertentblockage.
Vent Termination Clearances
NOTE: InCanada,theCanadianFuelGasCodetakesprecedence
overtheprecedingterminationrestrictions.
CANADIANVENTINGREQUIREMENTS
InCanada,ventingmustconform to the requirements of the cur-
rentCAN/CSA-B149.1-05InstallationCode.UseonlyCSA-listed,
ULC-S636complianttwo-orthree-inchdiameterPVCorABSpipe,
solventcement,andfittingsthroughout. Thecertifiedpipingshould
beclearlymarkedwiththeULCStd“S636”onthepipeandfittings.
Carefully follow the pipe manufacturers’ instructions for cutting,
cleaning,andsolventcementingPVCand/orABS.
Theventcanberunthroughanexistingunusedchimneyprovided
thespacebetweentheventpipeandthechimneyisinsulatedand
closedwithaweather-tight,corrosion-resistantflashing.
STANDARDFURNACECONNECTIONS
It is the responsibility of the installer to ensure that the piping
connections to the furnace are secure, airtight, and adequately
supported.
Asshipped,attachment“couplings”forvent/flueandcombustion
airintakepipeconnectionsareprovidedonthefurnace’stopcover
(upflow) or basepan (counterflow). To use the standard connec-
tions,field suppliedvent/fluepipeand combustionairintake pipe
(when applicable) should be secured directly to the furnace at
theselocations.
VENT/FLUEPIPE
Vent/flue pipe can be secured to the vent/flue coupling using the
rubber coupling and worm gear hose clamps provided with this
furnace(see“StandardConnections”figure). Therubbercoupling
allowsseparationofthevent/fluepipefromthefurnaceduringser-
12"
Non-Direct Vent
Vent/Flue Termination
No Terminations
Above Walkway
12"
min.
4'
min.
Non-Direct Vent
Vent/Flue Termination
Direct Vent
Vent/Flue Termination
<10'
Forced Air
Inlet
Non-Direct Vent
&
Direct Vent
Vent/Flue Terminations
Grade or Highest
Anticipated
Snow Level
3' min.
12" min.
4' min.
12" min.

15
RUBBER
COUPLING
WITH WORM
GEAR CLAMPS
RUBBER
COUPLINGS
WITH WORM
GEAR CLAMPS
COMBUSTION
AIR PIPE
(DIRECT VENT ONLY)
COMBUSTION
AIR PIPE
(DIRECT VENT ONLY)
VENT/FLUE
PIPE
VENT/FLUE
PIPE
90 PVC
ELBOW
(
NON-DIRECT VENT
)
90 PVC
ELBOW
(
NON-DIRECT VENT
)
Standard Connections
OR
OR
UPFLOW COUNTERFLOW
ALTERNATEFURNACECONNECTIONS
Ifthestandardlocationsareundesirableforaspecificinstallation,
alternatesidepanellocationsareavailableforbothcombustionair
inlet and vent/flue pipe connections. These locations may be of
particularbenefittouprightupflowinstallationsrequiringadditional
accesstoanAcoil,ortouprightcounterflowinstallationsrequiring
additionalaccesstoafilterorelectronicaircleaner,ortohorizontal
installations desiring vent/flue (and combustion air intake) piping
runverticallyfromthesideofthecabinet.
NOTE: Standardand alternate locations can becombined(i.e.,
an installation may use the standard combustion air intake loca-
tionbutusethealternatevent/fluelocationorviceversa),ifneeded.
E DGES  OF  SHEET  METAL  HOLES  MAY  BE  SHARP .U SE  GLOVES  AS  A 
PRECAUTION  WHEN  REMOVING  HOLE  PLUGS .
WARNING
ALTERNATEVENT/FLUELOCATION
Thealternatevent/fluelocationisthelargeholedirectlyinlinewith
theinduceddraftbloweroutlet. Tousethealternatevent/flueloca-
tionrefertothefollowingstepsandthe“AlternateVent/FlueLoca-
tion”figure.
NOTE: Counterflowinstructionsfollowtheupflowinstructions.
1. Remove and save the four screws securing the vent/flue
couplingtothefurnacetoppanel.
Counterflowunits.
Remove and save the four screws securing the vent/flue
coupling to the furnace basepan. Also remove the three
screws securing the furnace’s internal vent/flue piping to
theblowerdeck.
2. UpflowandCounterflowunits.
Loosen the worm gear hose clamps on the rubber elbow
and detach it from both the induced draft blower and the
vent/fluepipe.
3. UpflowandCounterflowunits.
Removethevent/fluepipefromthefurnace.
4. Cut the vent/flue pipe 3.75 inches from the flanged end of
thepipe (see“Vent/FluePipe Cuts”figure).The sectionof
pipe attached to the coupling will reach through the side
panel to the induced draft blower. Discard remaining pipe
andelbows.
Counterflowunits.
Cut the vent/flue pipe 3.75 inches from the blower deck
coupling(see“Vent/FluePipeCuts”figure).Savevent/flue
pipeattachedtoblowerdeckcouplingforuseinthealternate
location.Discardremainingpipeandelbows.
FLANGE
CUT HERE
3.75"
Vent/FluePipeCuts
5. Remove plastic plug from alternate vent/flue location.
Relocateandinstallpluginstandardvent/fluelocation(top
cover).
Counterflowunits.
Remove plastic plug from alternate vent/flue location.
Relocate and install plug in standard vent/flue location
(basepan). Plugremainingholeinblowerdeckwithplastic
plugincludedin the drain kit bag.
6. UpflowandCounterflowunits.
Insertcutsectionofvent/fluepipeandcouplingintoalternate
vent/fluelocation. Usingarubbercouplingandwormgear
hose clamps from the drain kit bag, attach the vent/flue
pipeand couplingtothe induceddraftblower. Secure the
couplingtothecabinetusingthescrewsremovedinstep1
orwithfield-supplied3/8” #8selfdrillingscrews.
T HE  RUBBER  ELBOW  IS  NOT  DESIGNED  TO  SUPPORT  A  LOAD .W HEN  THE 
RUBBER  ELBOW  IS  MOUNTED  EXTERNALLY  TO  THE  FURNACE  CABINET ,
EXTREME  CARE  MUST  BE  TAKEN  TO  ADEQUATELY  SUPPORT  FIELD ‐
SUPPLIED  VENT / FLUE  PIPING , AS  DAMAGE  CAN  RESULT  IN  LEAKS 
CAUSING  BODILY  INJURY  OR  DEATH  DUE  TO  EXPOSURE  TO  FLUE  GASES ,
INCLUDING  CARBON  MONOXIDE
WARNING
7. UpflowandCounterflowunits.
For upright installations, externally mount the rubber
elbow to the vent/flue coupling using a worm gear hose
clamp. Securefieldsuppliedvent/fluepipingtotherubber
elbowusingawormgearhoseclamp. NOTE: Useofthe
alternatevent/fluelocationforuprightinstallations,requires
the drain trap be installed on the same side of the unit as
thefluepipe.

16
8. UpflowandCounterflowunits.
For horizontal installations, externally secure the field-
suppliedvent/fluepipedirectlytothevent/fluecouplingusing
aPVCorABS coupling orelbow.
ALTERNATECOMBUSTIONAIRINTAKELOCATION
The alternate combustion air intake location consists of a large,
unobstructed hole (alternate vent connection is aligned with the
InducedDraftBlower).Tousethealternatecombustionairintake
location,refer tothefollowingsteps, and the“AlternateCombus-
tionAirIntakeLocation”figure.
1. Removeandsavethefourscrewssecuringthecombustion
airintakecouplingtothebasepan. Removeanadditional
three screws securing the furnace’s internal combustion
airintake pipe to theblower deck.
2. Remove the combustion air intake pipe from the furnace
andcutthepipeatthebasepancoupling. Savethebasepan
couplingandgasketfromtheblowerdeckcouplingforuse
inthe alternatelocation. Discardtheremaining pipe.
3. Remove plasticplug from alternatecombustion airintake
location. Relocate and install plug in standard air intake
location(basepan). Plugtheremainingholeintheblower
deck with the plastic plug included in the drain kit bag.
4. With the gasket facing the cabinet side panel, and the
flange’sflatspotfacingforward,securethecombustionair
intakecouplingtothecabinetusingthescrewsremovedin
step1orwithfield-supplied3/8”#8self-drillingscrews.
B E  SURE  NOT  TO  DAMAGE  INTERNAL  WIRING  OR  OTHER  COMPONENTS 
WHEN  REINSTALLING  COUPLING  AND  SCREWS .
CAUTION
5. Fornon-directventinstallationsinstalledhorizontally,a
minimum of one 90° elbow should be installed on the
combustionairintakecouplingtoguardagainstinadvertent
blockage. Noelbowisrequiredonthealternatecombustion
air intake of upright installations, however, a minimum
clearanceof2inchesisrequiredtoassureproperairsupply.
6. For direct vent installations, secure field-supplied
combustionairintakepipedirectlytotheairintakecoupling.
NOTE: APVCcouplingorelbowisrequiredoncounterflow
units.
5
ADDITIONAL PLUG
FROM DRAIN KIT
7
EXTERNALLY
MOUNT
RUBBER ELBOW
6
SECURE TO
ID BLOWER WITH
RUBBER COUPLING
AND HOSE
CLAMPS
3
REMOVE
PIPE
2
DETACH RUBBER
ELBOW FROM
ID BLOWER AND
VENT/FLUE
PIPE
2
DETATCH RUBBER
ELBOW FROM
ID BLOWER AND
VENT/FLUE
PIPE
3
REMOVE
PIPE
5
REMOVE
A
ND RELOCATE
5
REMOVE
AND RELOCATE
1
REMOVE
3 SCREWS
6
SECURE TO
ID BLOWER WITH
RUBBER COUPLING
AND HOSE
CLAMPS
6
SECURE TO
CABINET WITH
SCREWS

17
NON-DIRECTVENT(SINGLEPIPE)PIPING
Non-directventinstallationsrequireonlyavent/fluepipe. Thevent
pipe can be run horizontally with an exit through the side of the
buildingorrunverticallywithanexitthroughtheroofofthebuilding.
The vent can also be run through an existing unused chimney;
however,itmustextendaminimumof12inchesabovethetopof
thechimney. Thespacebetweenthevent pipe andthechimney
mustbeclosedwithaweather-tight, corrosion-resistantflashing.
Fordetailsconcerningconnectionofthevent/fluepipetothefur-
nace,refertoVent/FluePipeandCombustionAir-StandardFur-
naceConnections orAlternate FurnaceConnectionsforspecific
details. RefertothefollowingNon-DirectVent(SinglePipe)Piping
- Vent/Flue Pipe Terminations for specific details on termination
construction.
Althoughnon-directventinstallationsdonotrequireacombustion
airintakepipe,aminimumofone90°elbowshouldbeattachedto
thefurnace’scombustionairintakeif:anuprightinstallationuses
the standard intake location, or a horizontal installation uses the
alternateairintakelocation. Thiselbowwillguardagainstinadvert-
entblockageof the air intake.
VENT/FLUE PIPELENGTHS AND DIAMETERS
NOTE: If either a 90 degree or 45 degree elbow is used for
termination,itmustbe pointed downward.
Refertothefollowingtableforapplicablelength,elbows,andpipe
diameter for construction of the vent/flue pipe system of a non-
directventinstallation. Inadditiontothevent/fluepipe,asingle90°
elbow should be secured to the combustion air intake to prevent
inadvertent blockage. The tee used in the vent/flue termination
mustbe included when determining thenumber ofelbowsinthe
piping system.
12345678
45,0002or21/27168656259565350
2or21/24946434037343128
3 7168656259565350
90,000 3 7168656259565350
115,000 3 4946434037343128
12345678
2or21/26158555249464340
3 7168656259565350
2or21/26158555249464340
3 7168656259565350
115,000 3 7168656259565350
UPFLOW
Non-Direct Vent (Single Pipe)
Maximum Allowable Length of Vent/Flue Pipe (ft) (1)(2)
70,000
Number of Elbows (3)(5)
Pipe (4)
(Inch)
Unit
Input
70,000
90,000
COUNTERFLOW
Non-Direct Vent (Single Pipe)
Maximum Allowable Length of Vent/Flue Pipe (ft) (1)(2)
Unit
Input Pipe (4)
(Inch) Number of Elbows (3)(5)
1) One 90° elbow should be secured to the combustion air intake connection.
2) Minimum requirement for each vent pipe is five (5) feet in length and one
elbow/tee.
3) Teeused inthe vent/fluetermination mustbeincluded whendetermining the
number of elbows in the piping system.
4) 2-1/2” or 3” diameter pipe can be used in place of 2” diameter pipe.
5) Increased Clearance Configurations using (2) 45 deg. Long Sweep el-
bows should be considered equivalent to one 90 deg. elbow.

18
VENT/FLUEPIPETERMINATIONS
The vent/flue pipe may terminate vertically, as through a roof, or
horizontally, asthroughanoutsidewall.
Verticalvent/fluepipeterminationsshouldbeasshowninthefol-
lowingfigure. RefertoVent/FluePipeandCombustionAirPipe-
TerminationLocationsfordetailsconcerninglocationrestrictions.
Thepenetrationofthevent through the roof must be sealed tight
withproper flashing suchasisused withaplasticplumbing vent.
Horizontal vent/flue pipe terminations should be as shown in the
followingfigure.RefertoVent/FluePipeandCombustionAirPipe
-TerminationLocationsfordetailsconcerninglocationrestrictions.
A23/8”diameter wallpenetrationisrequiredfor2”diameterpipe.
A3”diameterholeisrequiredfora21/2”pipeanda 31/2”diam-
eterholeisrequiredfor3”diameterpipe. Tosecurethepipepass-
ingthroughthewallandprohibitdamagetopipingconnections,a
couplingshouldbeinstalledoneither sideofthewallandsolvent
cemented to a length of pipe connecting the two couplings. The
length of pipe should be the wall thickness plus the depth of the
socketfittingstobeinstalledontheinsideandoutsideofthe wall.
The wall penetration should be sealed with silicone caulking
material.
In a basementinstallation,the vent/fluepipe canbe runbetween
joistspaces. Iftheventpipemustgobelowajoistandthenupinto
thelastjoistspacetopenetratetheheader,two45°elbowsshould
beusedtoreachtheheaderratherthantwo90°elbows.
TEE (OPTIONAL)
12 " Min To Roof
Or Highest Anticipated
Snow Level
12 " Min To Roof
Or Highest Anticipated
Snow Level
VerticalTermination (SinglePipe)
_______________________
12" MIN. TO ROOF
OR HIGHEST ANTICIPATED
SNOW LEVEL
90º
MEDIUM RADIUS
ELBOWS
or 45º
Alternate Vertical Termination (Single Pipe)
MIN.
12"
FROM
WALL
12" TO GROUND OR
HIGHEST ANTICIPATED
SNOW LEVEL
HorizontalTermination(SinglePipe)
_______________________
VENT/FLUE TEE
45° ELBOW
TURNED DOWN
or
90° ELBOW TURNED
DOWN
12" MIN. ABOVE
HIGHESTANTICIPATED
SNOW LEVEL
12" MIN.
HorizontalTermination(SinglePipe)
AboveHighestAnticipatedSnowLevel
DIRECTVENT(DUALPIPE)PIPING
Theinletairscreensprovidedintheinstallationinstructionpacket
areavailablefortheinstallertouseintheinletofthecombustionair
pipetoprevent animals frombuildingnestsinthecombustion air
pipe. Installationofscreens,whilestronglyrecommended,isnot
requiredandwillnotaffectperformanceoftheunit.
Directventinstallationsrequirebothacombustionairintakeanda
vent/fluepipe. Thepipesmayberunhorizontallyandexitthrough
thesideofthebuildingorrunverticallyandexitthroughtheroofof
the building. The pipes may be run through an existing unused
chimney; however, they must extend a minimum of 12 inches
abovethe topofthe chimney. Thespacebetween thepipesand
thechimneymustbeclosedwithaweathertight,corrosionresis-
tantflashing. Both thecombustionair intakeanda vent/fluepipe
terminations must be in the same atmospheric pressure zone.
Refer to Vent/Flue and CombustionAir Pipe - Termination Loca-
tionsorConcentricVentTerminationforspecificdetails ontermi-
nationconstruction. Fordetailsconcerningconnectionofpipesto
the furnace, refer to the Vent/Flue Pipe and Combustion Pipe -
StandardFurnaceConnectionsorAlternateFurnaceConnections.
VENT/FLUE &COMBUSTION AIR PIPELENGTHS &DIAMETERS
Refertothefollowingtableforapplicablelength,elbows,andpipe
diameterforconstructionofthevent/flueandcombustionairintake
pipesystemsofadirectvent(dualpipe)installation. Thenumber
ofelbowstabulatedrepresentsthenumberofelbowsand/ortees
ineach(Vent/Flue&CombustionAirIntake)pipe. Elbowsand/or
teesusedintheterminationsmustbeincludedwhendetermining
thenumber of elbows in thepipingsystems.

19
Ifthecombustionairintakepipeistobeinstalledaboveafinished
ceiling or other area where dripping of condensate will be objec-
tionable, insulation of the combustion air pipe may be required.
Use 1/2” thick closed cell foam insulation such asArmaflex™ or
Insultube™whererequired.
VENT/FLUE AND COMBUSTION AIRPIPE TERMINATIONS
Thevent/flueandcombustionairpipesmayterminatevertically,as
througharoof,orhorizontally,asthroughanoutsidewall.
12345678
Standard2or21/27168656259565350
Alternate2or21/25855524946434037
2or21/24946434037343128
3 7168656259565350
2or21/23633302724211815
3 5754514845423936
Standard 3 7168656259565350
Alternate 3 57 54 51 48 45 42 39 36
Standard 3 4946434037343128
Alternate 3 35 32 29 26 23 20 17 14
*Maximum allowable limits listedare individual lengths for inlet &flueand NOT acombination.
12345678
2or21/24946434037343128
3 7168656259565350
2or21/23633302724211815
3 5754514845423936
2or21/26158555249464340
3 7168656259565350
2or21/24845423936333027
3 5754514845423936
Standard 3 7168656259565350
Alternate 3 57 54 51 48 45 42 39 36
*Maximum allowable limits listedare individual lengths for inlet &flueand NOT acombination.
115,000
NumberofElbows (1)(2)(3)(5)
Direct Vent(Dual Pipe) Maximum Allowable Length*
of Vent/Flue & Combustion Air Intake Pipe(ft)
UPFLOW
Pipe(4)
(inch)
Termination
Style
Unit Input
(Btu)
45,000
Standard
Alternate
70,000
90,000
115,000
COUNTERFLOW
Direct Vent(Dual Pipe) Maximum Allowable Length*
of Vent/Flue & Combustion Air Intake Pipe(ft)
Unit Input
(Btu) Termination Style Pipe(4)
(inch) Numberof Elbows (1)(2)(3)(5)
90,000 Standard
Alternate
70,000 Standard
Alternate
1) Elbows and/or tees used in terminations must be included when determin-
ing quantity of allowable elbows in the system.
2) Number of elbows tabulated are for each (Vent/Flue & Combustion Air
Intake)pipe.
3) Minimum requirements for each Vent/Flue & Combustion Air Intake pipe is
five (5) feet in length and one elbow/tee.
4) 2 1/2” or 3” diameter pipe can be used in place of 2” diameter pipe.
5) Increased Clearance Configurations using (2) 45 deg. Long Sweep el-
bows should be considered equivalent to one 90 deg. elbow.
Vertical pipe terminations should be as shown in the following
figure. Refer to Vent/Flue Pipe and Combustion Pipe - Termina-
tion Locations for details concerning location restrictions. The
penetrations through the roof must be sealed tight with proper
flashingsuch as is used witha plasticplumbing vent.
V
ENT/FLUE
COMBUSTION
AIR INTAKE
SCREEN
(OPTIONAL)
12" MIN. TO ROOF
OR HIGHEST ANTICIPATED
SNOW LEVEL
12" MIN.
TEE (OPTIONAL)
_______________________
SCREEN
(OPTIONAL)
12" MIN. TO ROOF
OR HIGHEST ANTICIPATED
SNOW LEVEL
12" MIN.
V
ENT/FLUE
VerticalTerminations (DualPipe)
Horizontalterminationsshouldbeasshowninthefollowingfigure.
RefertoVent/FluePipeandCombustionPipe-TerminationLoca-
tionfor location restrictions.A2 3/8” diameter wallpenetration is
requiredfor2”diameterpipe. A3”diameterholeisrequiredfora2
1/2” pipe and a 3 1/2” diameter hole is required for 3” diameter
pipe. To secure the pipe passing through the wall and prohibit
damagetopiping connections, a coupling should beinstalled on
eithersideofthewallandsolventcementedtoapipeconnecting
the two couplings. The pipe length should be the wall thickness
plus the depth of the socket fittings to be installed on the inside
andoutsideofthewall. Thewallpenetrationshouldbesealedwith
siliconecaulking material.
90º or 45°
MEDIUM RADIUS
ELBOWS
3" MIN
24" MAX
12" MIN. TO ROOF OR
HIGHEST ANTICIPATED
SNOW LEVEL
12" MIN. TO ROOF OR
HIGHEST ANTICIPATED
SNOW LEVEL
12" MIN
3" MIN
24" MAX
SCREEN
(OPTIONAL)
StandardHorizontal Terminations(DualPipe)

20
24" MAX
3" MIN
24" MAX
AIR
INTAKE
12” MIN
SCREEN
(OPTIONAL)
90º MEDIUM
RADIUS ELBOWS
AlternateHorizontalVentTermination(DualPipe)
_______________________
SUPPORT
STRAPS
V
ENT/FLUE
TEE
12" MIN. ABOVE
HIGHEST ANTICIPATED
SNOW LEVEL
12" MIN. ABOVE
HIGHEST ANTICIPATED
SNOW LEVEL
90° or 45°
MEDIUM RADIUS
ELBOWS
SCREEN
(OPTIONAL)
COMBUSTION
AIR INTAKE
12" MIN
3" MIN
24" MAX
StandardHorizontalTerminationsAboveAnticipatedSnow
Level(DualPipe)
_______________________
SCREEN
(OPTIONAL)
12" MIN. TO ROOF OR
HIGHEST ANTICIPATED
SNOW LEVEL
AlternateVentTerminationAboveAnticipatedSnowLevel
(DualPipe)
Inabasementinstallation,thepipesmayberunbetweenthejoist
spaces. If the pipes must go below the joist and then up into the
lastjoistspacetopenetratetheheader,two45°elbowsshouldbe
usedtoreachtheheaderratherthantwo90°elbows.
VENT/INTAKETERMINATIONSFORINSTALLATIONOFMULTIPLE
DIRECTVENTFURNACES
If more than one direct vent furnace is to be installed vertically
through a common roof top, maintain the same minimum clear-
ances between the exhaust vent and air intake terminations of
adjacentunitsaswiththeexhaustventandairintaketerminations
of a single unit.
Ifmorethanone direct vent furnace is to be installed horizontally
through a common side wall, maintain the clearances as in the
following figure.Always terminate all exhaust vent outlets at the
same elevation and always terminate all air intakes at the same
elevation.
V
ents
24" Max.
3" Min.
12" Min. Screen
(Optional)
24" Max.
Air
Intakes
90°
Medium
Radius
Elbows
24" Max.
3" Min.
3" Min.
12" MIN. ABOVE
HIGHEST ANTICIPATED
SNOW LEVEL
HorizontalVentingOfMultipleUnits
CONCENTRICVENTTERMINATION
RefertothedirectionsprovidedwiththeConcentricVentKit(DCVK)
for installation specifications.
SIDE WALL VENT KIT
Thiskitistobeusedwith2”or3”directventsystems.Theventkit
mustterminateoutsidethestructureandmaybeinstalledwiththe
intake and exhaust pipes located side-by-side or with one pipe
abovetheother. This kit is NOT intended for use with singlepipe
(indirectvent)installations.
Refer to the directions furnished with the Side Wall Vent Kit
(p/n0170K00000S)forinstallationspecifications.