Goodman MVM96 Series User manual
5151 San Felipe Suite 500
Houston, TX 77056
www.goodmanmfg.com • www.amana-hac.com
©2011 Goodman Manufacturing Company, L.P.
I
NSTALLATION
I
NSTRUCTIONS
FOR
*MVM96 & *CVM96
M
ODULATING
G
AS
F
URNACE
IO-406
6/11
(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.
CUS
®
Installer: Affix all manuals adjacent to the unit.
*NOTE: Please contact your distributor
or our website for the applicable
Specification Sheet 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
TABLEOFCONTENTS
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
EXISTING FURNACE REMOVAL ........................................................................................................................... 9
THERMOSTAT LOCATION .................................................................................................................................. 10
COMBUSTION & VENTILATION AIR REQUIREMENTS............................................................................... 10
INSTALLATION POSITIONS............................................................................................................................ 10
HORIZONTAL APPLICATIONS & CONSIDERATIONS .................................................................................. 10
FURNACE SUSPENSION ....................................................................................................................................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
PROPANE GAS/HIGH ALTITUDE INSTALLATIONS ...................................................................................... 12
VENT/FLUE PIPE & COMBUSTION AIR PIPE ............................................................................................... 12
DUAL CERTIFICATION: NON-DIRECT/DIRECT VENT ................................................................................................ 13
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............................................................................................... 20
STANDARD RIGHT OR LEFT SIDE DRAIN HOSE CONNECTIONS ................................................................................ 21
UPRIGHT INSTALLATIONS-TRAP ON RIGHT SIDE ................................................................................................... 21
UPRIGHT INSTALLATIONS-TRAP ON LEFT SIDE ..................................................................................................... 23
HORIZONTAL INSTALLATIONS ............................................................................................................................. 24
ELECTRICAL CONNECTIONS ....................................................................................................................... 26
WIRING HARNESS ......................................................................................................................................... 26
115 VOLT LINE CONNECTIONS ......................................................................................................................... 26
JUNCTION BOX RELOCATION ............................................................................................................................ 26
24VOLT THERMOSTAT WIRING ......................................................................................................................... 27
SINGLE-STAGE HEATING THERMOSTAT APPLICATION ............................................................................................. 28
24VOLT DEHUMIDISTAT WIRING ....................................................................................................................... 28
FOSSIL FUEL APPLICATIONS ............................................................................................................................ 28
115 VOLT LINE CONNECTION OF ACCESSORIES (HUMIDIFIER AND ELECTRONIC AIR CLEANER) .................................... 28
24 VOLT HUMIDIFIER...................................................................................................................................... 29
3
GAS SUPPLY AND PIPING .............................................................................................................................. 29
HIGH ALTITUDE DERATE .................................................................................................................................. 29
PROPANE GAS CONVERSION ........................................................................................................................... 29
GAS PIPING CONNECTIONS ............................................................................................................................. 30
PROPANE GAS TANKS AND PIPING................................................................................................................... 32
CIRCULATING AIR & FILTERS........................................................................................................................ 33
DUCT WORK -AIR FLOW ................................................................................................................................. 33
CHECKING DUCT STATIC .................................................................................................................................. 33
BOTTOM RETURN AIR OPENING [UPFLOW MODELS]............................................................................................ 34
FILTERS - READ THIS SECTION BEFORE INSTALLING THE RETURN AIR DUCT WORK ................................................... 34
UPRIGHT INSTALLATIONS .................................................................................................................................. 35
HORIZONTAL INSTALLATIONS ............................................................................................................................. 35
STARTUP PROCEDURE & ADJUSTMENT ................................................................................................... 35
HEATING OPERATION WITH CTK01AATHERMOSTAT (COMMUNICATING) .................................................................. 36
HEATING OPERATION WITH CTK02AATHERMOSTAT (MODULATING COMMUNICATING) ................................................ 37
HEAT ANTICIPATOR SETTING ............................................................................................................................. 37
DRAIN TRAP PRIMING .................................................................................................................................... 37
FURNACE OPERATION ..................................................................................................................................... 37
GAS SUPPLY PRESSURE MEASUREMENT ........................................................................................................... 37
GAS MANIFOLD PRESSURE MEASUREMENT ....................................................................................................... 38
GAS INPUT RATE MEASUREMENT (NATURAL GAS ONLY) ...................................................................................... 39
TEMPERATURE RISE ...................................................................................................................................... 39
CIRCULATOR BLOWER SPEEDS ........................................................................................................................ 40
BLOWER HEAT OFF DELAY TIMINGS ................................................................................................................ 42
COMFORTNET™ SYSTEM ............................................................................................................................ 42
OVERVIEW ................................................................................................................................................... 42
AIRFLOW CONSIDERATION ................................................................................................................................42
DIP SWITCHES................................................................................................................................................. 44
FOSSIL FUEL APPLICATIONS ............................................................................................................................ 45
CTK0*AAWIRING ....................................................................................................................................... 45
COMFORTNET™SYSTEM ADVANCED FEATURES .................................................................................................. 45
FURNACE ADVANCED FEATURES MENU .............................................................................................................. 46
NETWORK TROUBLESHOOTING ........................................................................................................................... 47
SYSTEM TROUBLESHOOTING ............................................................................................................................ 47
FAULT RECALL SEQUENCE .............................................................................................................................. 47
FAULT CLEAR SEQUENCE: .............................................................................................................................. 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 .................................................................................................................. 49
INTEGRATED FURNACE CONTROL (IFC) ............................................................................................................. 49
PRIMARY LIMIT ............................................................................................................................................. 49
AUXILIARY LIMIT ............................................................................................................................................ 49
ROLLOUT LIMIT ............................................................................................................................................. 49
PRESSURE SWITCHES..................................................................................................................................... 50
FLAME SENSOR ............................................................................................................................................ 50
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
TROUBLESHOOTING..................................................................................................................................... 50
ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS .............................................................................................. 50
DIAGNOSTIC CHART ....................................................................................................................................... 50
RESETTING FROM LOCKOUT ............................................................................................................................ 50
MAINTENANCE ................................................................................................................................................ 50
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
BEFORE LEAVING AN INSTALLATION .......................................................................................................... 52
REPAIR AND REPLACEMENT PARTS ........................................................................................................... 52
TROUBLESHOOTING CODES....................................................................................................................... 53
STATUS CODES............................................................................................................................................... 58
WIRING DIAGRAM............................................................................................................................................ 59
5
Adheretothefollowingwarnings and cautionswhen installing,adjusting,altering, servicing, oroperating the furnace. Toensure
proper installation and operation, thoroughly read this manual for specifics pertaining to the installation and application of this
product.
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
.
WHATTODOIFYOUSMELLGAS:
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
6
SHIPPINGINSPECTION
Allunits are securelypackedin shippingcontainerstested ac-
cordingtoInternationalSafeTransitAssociationspecifications.
Thecartonmustbecheckeduponarrivalforexternaldamage. If
damage is found, a request for inspection by carrier’s agent
mustbemadein writing immediately.
Thefurnacemustbecarefullyinspectedonarrivalfordamage
and bolts or screws which may have come loose in transit. In
theeventofdamagetheconsigneeshould:
1. Makeanotationondeliveryreceiptofanyvisibledamage
toshipmentor container.
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.
Anelectrostaticdischarge can adversely affectelectricalcom-
ponents.
Use the following precautions during furnace installation and
servicingtoprotecttheintegratedcontrolmodulefromdamage.
Byputtingthefurnace,thecontrol,andthepersonatthesame
electrostaticpotential,thesestepswillhelpavoidexposingthe
integratedcontrolmoduletoelectrostaticdischarge. Thispro-
cedure is applicable to both installed and non-installed (un-
grounded)furnaces.
1. Disconnect all power to the furnace. Do not touch the
integratedcontrol moduleor anywireconnected tothe
control prior to discharging your body’s electrostatic
chargetoground.
2. Firmly touch a clean, unpainted, metal surface of the
furnacesnear thecontrol. Any toolsheldin a person’s
handduringgroundingwillbedischarged.
3. Service integratedcontrol moduleor connecting wiring
following the discharge process in step 2. Use caution
nottorecharge yourbody withstaticelectricity;(i.e., do
notmoveorshuffleyourfeet,do nottouchungrounded
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.
ToreceivetheLifetimeHeatExchangerLimitedWarranty(goodfor
as long as you own your home) and the 10-year Parts Limited
Warranty,onlineregistrationmustbecompletedwithin60daysof
installation.OnlineregistrationisnotrequiredinCaliforniaorQue-
bec. Complete warranty details are available from your local
dealerorat www.goodmanmfg.com oratwww.amana-hac.com.
ToregisteryourGoodmanbrandunit,gotowww.goodmanmfg.com.
Clickon theword “Warranty”located on theleft side ofthehome
page. Next, click on the word “Product Registration” located on
the left side of the Warranty page and complete the forms in the
mannerindicatedontheProductRegistrationpage.
ToregisteryourAmana®brandunit,gotowww.amana-hac.com.
Clickonthe word “Warranty” located onthetoprightofthehome
page. Next, click on the word “Product Registration” located on
the left side of the Warranty page and complete the forms in the
mannerindicatedontheProductRegistrationpage.
Product limited warranty certificates for models currently in pro-
duction can be viewed at www.goodmanmfg or www.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,
clickonthe Product Warrantytext onthe 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*AA thermostatkitallowsthisfurnacetobeinstalledaspart
ofadigitallycommunicatingsystem.TheComfortNetsystempro-
vides automatic airflow configuration, enhanced setup features,
andenhanceddiagnostics.Italsoreducesthenumberofthermo-
statwirestoamaximumoffour.Itmaybealsoinstalledaspartof
anon-communicatingsystemusingastandard24VACthermo-
stat.
ThisproductmaybeinstalledwiththeComfortNetthermostatand
a non-ComfortNet compatible single stage air conditioning unit.
However, this reduces the benefits of the ComfortNet system as
theenhancementswillonlyapply to the furnace.
Themodulatingfurnaceoperationisbasedoffofnegativepres-
surecreated by thethedraftinducer.The IntegratedFurnace
Control(IFC) receives commandsfrom the roomthermostat.
The IFC then controls the RPM of the (3 phase) inducer by
varyingthe frequencyandvoltagetotheinducer.Thisisknown
as variable frequency drive (VFD). The inducer, pressure
switches,and gasvalve are linkedby pneumatictubing.The
gasvalve modulates basedon this negativepressure.
P
RODUCT
A
PPLICATION
Thisfurnaceisprimarilydesignedforresidentialhome-heatingap-
plications. ItisNOTdesignedorcertifiedforuseinmobilehomes,
trailersorrecreational vehicles. Neither isit designedor certified
for outdoor applications. The furnace must be installed indoors
(i.e.,atticspace,crawlspace,orgarageareaprovidedthegarage
areaisenclosedwithanoperatingdoor).
Thisfurnacecanbeusedinthefollowingnon-industrialcommer-
cialapplications:
Schools,Officebuildings,Churches,Retailstores,
Nursinghomes,Hotels/motels,Commonorofficeareas
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
inthe conditioned space.
• 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 airis takenfrom theinstallation 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
allof thefollowingconditionsaremet:
• The vent system is permanently installed per these
installationinstructions.
• Aroom thermostat isusedto controlthe furnace.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.
8
• 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.
AcopyoftheNationalFuelGasCode(NFPA54/ANSIZ223.1)
canbeobtainedfromanyofthefollowing:
American National Standards Institute
1430Broadway
NewYork, NY 10018
NationalFireProtectionAssociation
1BatterymarchPark
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.
Acopy of theCAN/CSAB149InstallationCodescanalsobe
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
andcombustion air intakepipewhen applicable. Refer
toVent/FluePipeandCombustionAirPipe-Termination
Locations for appropriate termination locations and to
determineifthepipingsystemfromfurnacetotermination
canbeaccomplishedwithintheguidelinesgiven. NOTE:
Thelengthofflueand/orcombustionairpipingcanbea
limitingfactorinthelocationofthe furnace.
• 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 wherethecombustion airis exposed tothe
followingsubstances:
permanentwavesolutions
chlorinatedwaxesorcleaners
chlorine-basedswimmingpoolchemicals
watersofteningchemicals
9
deicing salts or chemicals
carbontetrachloride
halogentyperefrigerants
cleaningsolutions(suchasperchloroethylene)
printinginks
paintremovers
varnishes
hydrochloricacid
cementsandglues
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.
• 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
resultifthecooling unit isplaced ahead ofthe 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
theinstructionswiththe subbase for properinstallation.
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. Theseclearancesmustbepermanentlymaintained.
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.
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 any unusedopeningsintheventingsystem;
2. Inspecttheventing system forproper sizeandhorizon-
tal pitch, as required by the National Fuel Gas Code,
ANSIZ223.1 orthe Natural Gasand PropaneInstalla-
tionCode, CSAB149.1-05and theseinstructions.De-
termine that there is no blockage or restriction, leak-
age,corrosionand other deficiencieswhichcouldcause
anunsafecondition.
10
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/ANSIZ223.1or CAN/CSA B149Installation Codesorappli-
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
totheoutdoorsorspacesopentotheoutdoorssuchasatticsor
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“RecommendedInstallationPositions”figure for
appropriateinstallationpositions,ductworkconnections,andre-
sultingairflowarrangements.
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:
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. Turnonclothesdryersandany appliancenotconnected
to the venting system. Turn on any exhaust fans, such
as range hoods and bathroom exhausts, so they shall
operateat maximumspeed.Do notoperatea summer
exhaustfan.
6. Followthelightinginstructions.Placetheappliancebeing
inspectedin operation.Adjust thermostat soappliance
shalloperate continuously.
7. Testfor spillagefromdrafthood appliancesatthe draft
hood relief opening after 5 minutes of main burner op-
eration. Use the flame of a match or candle.
8. Ifimproperventing is observedduringanyof the above
tests, the venting system must be corrected in accor-
dance with the National Fuel Gas CodeANSI Z223.1/
NFPA54 and/orNationalGasand PropaneInstallation
CodeCSAB149.1-05.
9. After it has been determined that each appliance con-
nectedto theventingsystemproperlyventswhentested
asoutlinedabove,returndoors,windows,exhaustfans,
fireplacedampersandany other gas burningappliance
totheir previousconditionsof use.
If resizing is required on any portion of the venting system, use
the appropriate table in Appendix 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.
• Hotorcoldairfrom registers.
• Radiantheatfromthesun.
• Lightfixturesorotherappliances.
• Radiantheatfromafireplace.
• Concealedhotor cold waterpipes,orchimneys.
• Unconditioned areas behind the thermostat, such as
anoutside wall.
Consulttheinstructionspackagedwiththethermostatfor
mountinginstructionsandfurtherprecautions.
11
HorizontalFurnace
FURNACESUSPENSION
Ifsuspendingthefurnacefromraftersorjoists,use3/8"threaded
rodand 2”x2”x1/8”angle iron asshown in thefollowing diagram.
Thelengthofrodwilldependontheapplicationandtheclearances
necessary.
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
thefurnaceonthegroundorallowit to be exposedtowater.
2" 2" 3/8"
ANGLE
IRON
(3
PLACES
)
XX
DRAINTRAPANDLINES
Inhorizontal applications thecondensatedraintrapissecuredto
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
shouldalsobelevelfrombacktofrontorhave a slight tilt with the
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
throughtheside of thefurnace. Refer tothe“RecommendedIn-
stallation Positions” figure for further detail. The standard piping
connectionsmay also beused in thesepositions. Referto Vent/
Flue Pipe and Combustion Air Pipe for details concerning the
conversiontothealternatevent/flueandcombustion air connec-
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
12
RecommendedInstallationPositions
NOTE: Alternate “vertical” piping connections can not be used
whenanupflowfurnace is installed with supplyairdischargingto
theright,orwhenacounterflowfurnaceisinstalledwithsupplyair
discharging to the left. In either case, use the standard flue and
combustionairpipingconnections.
ALTERNATEELECTRICALANDGASLINECONNECTIONS
Thisfurnacehasprovisionsallowingforelectricalandgaslinecon-
nectionsthrougheither side panel. Inhorizontal applicationsthe
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 HorizontalApplicationsand Conditions- Drain Trap and
Lines.
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
upto10,000ft.altitude. Propaneconversionsrequiretheproper
LP kit to compensate for the energy content difference be-
tweennaturaland propane gas.
LP kits include a manifold assembly, including an LP gas
valve,orificesandLP burners.
High Stage Low Stage
Natural None #4513.5" w.c. 1" w.c. None
Propane LPKMOD***** 1.25MM210.0" w.c. 2.6" w.c. None
NOTE: In Canada, gas furnacesare onlycertified to 4500 feet.
Orifice
2Except115,000 BTU:#55
1
Except115,000 BTU: #43
Gas
0-7000
Manifold Pressure Pressure
Switch
Change
Altitude Kit
GCVM961005DX LPKMOD100CF
A/GCVM960604CX LPKMOD060CF
A/GCVM960805DX LPKMOD080CF
A/GMVM961005DX
A/GMVM961155DX
LPKMOD060UF
LPKMOD080UF
LPKMOD100UF
LPKMOD115UF
Furnace Model LP Kit
A/GMVM960603BX
A/GMVM960805CX
Theindicatedkitsmustbeusedtoinsuresafeandproperfurnace
operation. All conversions must be performed by a qualified in-
staller,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
Acondensing gas furnaceachieves its highlevelof efficiencyby
extractingalmost allof the heatfrom theproductsof combustion
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 mustnotbe vented intoany portion ofafac-
torybuiltormasonrychimneyexceptwhenusedasapathwayfor
PVC as described later in this section. Never common vent this
appliancewithanotherapplianceoruseaventwhichisusedbya
solid fuel appliance. Do not use commercially available “no hub
connectors”other than thoseshippedwiththisproduct.
13
It is the responsibility of the installer to follow the manufacturers’
recommendationsandtoverifythatallvent/fluepipingandconnec-
tors are compatible with furnace flue products. Additionally, it is
theresponsibilityoftheinstallerto ensure thatall piping and con-
nectionspossessadequatestructuralintegrityandsupporttopre-
ventfluepipeseparation,shifting,orsaggingduringfurnaceopera-
tion.
DUALCERTIFICATION:NON-DIRECT/DIRECTVENT
Thisfurnaceisdualcertifiedandmaybeinstalledasanon-direct
vent(singlepipe)ordirectvent(dualpipe)appliance. Anon-direct
ventinstallation requires only avent/flue pipe, whilea directvent
installation requires both a vent/flue pipe and a combustion air
intakepipe. Refertotheappropriatesectionfordetailsconcerning
piping size, length, number of elbows, furnace connections, and
terminations.
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-
tionsfor cutting, cleaning,andsolventcementingofPVC.
Theuseof Schedule 40PVCorABS cellularcore (FoamCore)
plasticpipeisalsoacceptableasaflue/ventandintakepipemate-
rial. PVC primer meetingASTM F656 and PVC solvent cement
meetingASTMD2564specificationsmustbeused.Fittingsmust
be DWV type fittings meeting ASTM D2665 andASTM D3311.
Carefullyfollowthemanufacturesinstructionsforcutting,cleaning
andsolventcementingofPVC.
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 meet ASTM
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. Amediumradius (1/4 bendDWV) elbowmeasures3 1/
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,andnumberofelbows ofthe
vent/flue pipe and combustion air pipe (when applicable) affects
the performance of the furnace and must be carefully sized. All
pipingmustbeinstalledinaccordancewithlocalcodesandthese
instructions.
Pipingmustbeadequatelysecuredandsupportedtoprohibitsag-
ging,jointseparation,and/ordetachmentfromthefurnace. Hori-
zontalrunsofvent/fluepipingmustbesupportedeverythreetofive
feetandmust maintain a 1/4 inch perfootdownwardslope,back
towardsthefurnace,toproperlyreturncondensatetothefurnace’s
drain system. Allowances should be made for minor expansion
and contraction due to temperature variations. For this reason,
particularcaremustbetaken to securepiping when along run is
followedby a shortoffsetof less than40inches.
Precautionsshouldbetakentopreventcondensatefromfreezing
insidethevent/fluepipeand/oratthevent/fluepipetermination. All
vent/fluepipingexposedtotemperatures below 35°Fforextended
periodsoftimemustbeinsulatedwith1/2”thickclosedcellfoam.
Alsoall vent/flue pipingexposed outdoorsinexcess of thetermi-
nationsshowninthismanual(orinunheatedareas)mustbeinsu-
latedwith1/2” thickclosedcellfoam. Inspectpipingforleaksprior
to installing insulation.
TERMINATIONLOCATIONS
NOTE: RefertoLocationRequirementsandConsiderationsfor
combustionair contaminantrestrictions.
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,
or1footaboveanydoor,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).
14
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-
vicing.CombustionAirandVentpipingshouldberoutedinaman-
nertoavoidcontactwithrefrigerantlines,meteringdevices,con-
densate drain lines, etc. If necessary, clearances may be in-
creasedbyutilizingtwo45deg.Long-Sweep Elbows and creat-
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 units securethe combustionair intakepipe directly to
theairintakecoupling. Oncounterflowunitssecurethecombus-
tionairintakepipetotheairintakecouplingusingtherubbercou-
plingandwormgearhoseclampsprovidedwiththeunit.Thecoun-
terflowrubbercouplingallowsserviceremovalofairintakepiping
internalto thefurnace blowercompartment. NOTE: Becauseof
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.
• 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.
Non-Direct Vent
Vent/Flue Termination
No Terminations
Above Walkway
4'
min.
Non-Direct Vent
Vent/Flue Termination
Direct Vent
Vent/Flue Termination
Forced Air
Inlet
Non-Direct Vent
&
Direct Vent
Vent/Flue Terminations
Grade or Highest
Anticipated
Snow Level
12" min.
4' min.
12" min.
Vent Termination Clearances
NOTE: InCanada,theCanadianFuelGasCodetakesprecedence
overtheprecedingterminationrestrictions.
CANADIANVENTINGREQUIREMENTS
InCanada,venting mustconform tothe requirementsofthecur-
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,fieldsuppliedvent/fluepipeandcombustionairintakepipe
(when applicable) should be secured directly to the furnace at
theselocations.
15
NON-DIRECTVENTINSTALLATIONS
Aminimumofone90°elbow should beinstalled on the combus-
tionairintake“coupling”toguardagainstinadvertentblockage.
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 locationscan 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 thevent/fluepipe3.75 inchesfrom theflangedendof
thepipe(see“Vent/Flue Pipe Cuts”figure).Thesectionof
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
plugincluded inthedrain kitbag.
6. UpflowandCounterflowunits.
Insertcutsectionofvent/fluepipeandcouplingintoalternate
vent/fluelocation. Usingarubbercouplingandwormgear
hose clamps from the drain kit bag, attach the vent/flue
pipeandcouplingtotheinduceddraftblower. 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,refertothefollowingsteps,andthe “Alternate Combus-
tionAirIntakeLocation”figure.
1. Removeandsavethefourscrewssecuringthecombustion
airintake couplingtothebasepan. Removeanadditional
three screws securing the furnace’s internal combustion
airintake pipeto theblower deck.
2. Remove the combustion air intake pipe from the furnace
andcutthepipeatthebasepancoupling. Savethebasepan
couplingandgasketfromtheblowerdeckcouplingforuse
inthealternatelocation. Discardtheremainingpipe.
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.
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
6. For direct vent installations, secure field-supplied
combustionairintakepipedirectlytotheairintakecoupling.
NOTE: APVCcouplingorelbowisrequiredoncounterflow
units.
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. Thespacebetween thevent pipe and thechimney
mustbe closedwithaweather-tight,corrosion-resistantflashing.
Fordetails concerning connectionofthe vent/flue pipetothe fur-
nace,refertoVent/FluePipeandCombustionAir-StandardFur-
naceConnectionsor AlternateFurnace Connections for specific
details. RefertothefollowingNon-DirectVent(SinglePipe)Piping
- Vent/Flue Pipe Terminations for specific details on termination
construction.
Althoughnon-directventinstallationsdonotrequireacombustion
airintakepipe,aminimumofone90°elbowshouldbeattachedto
thefurnace’scombustion air intakeif: anuprightinstallationuses
the standard intake location, or a horizontal installation uses the
alternateairintakelocation. Thiselbowwillguardagainstinadvert-
entblockageof the airintake.
VENT/FLUE PIPELENGTHSAND DIAMETERS
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 includedwhen determining thenumber ofelbows in the
piping system.
12345678
2or21/24946434037343128
3 7168656259565350
80,000 3 7168656259565350
100,000
115,000 3 4946434037343128
*Maximum allowable limits listed are individual lengths for inlet & flue
and NOT a combination.
UPFLOW
Non-Direct Vent (Single Pipe)
Maximum Allowable Length of Vent/Flue Pipe (ft) (1)(2)
60,000
Number of Elbows (3)(5)
Pipe (4)
(Inch)
Unit
Input
12345678
2or21/26158555249464340
3 7168656259565350
2or21/26158555249464340
3 7168656259565350
100,000 3 7168656259565350
*Maximum allowable limits listed are individual lengths for inlet & flue
and NOT a combination.
60,000
80,000
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) Teeusedinthe vent/flue terminationmustbeincludedwhen determining 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.
VENT/FLUEPIPETERMINATIONS
NOTE: If either a 90 degree or 45 degree elbow is used for
terminiation,it mustbe pointeddownward.
The vent/flue pipe may terminate vertically, as through a roof, or
horizontally,asthroughanoutsidewall.
Verticalvent/fluepipeterminationsshouldbeasshowninthefol-
lowingfigure. RefertoVent/FluePipeandCombustionAirPipe-
TerminationLocationsfordetailsconcerninglocationrestrictions.
Thepenetrationof thevent throughthe roofmustbesealed tight
withproperflashingsuchasis used with aplasticplumbing 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
couplingshould beinstalledoneithersideofthewall andsolvent
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.
18
In a basementinstallation,the vent/fluepipe canberun between
joistspaces. Iftheventpipemustgobelowajoistandthenupinto
thelastjoistspacetopenetratetheheader,two45°elbowsshould
beusedtoreachtheheaderratherthantwo90°elbows.
12 " Min To Roof
Or Highest Anticipated
Snow Level
VerticalTermination(SinglePipe)
_____________________________________
TEE (OPTIONAL)
12 " Min To Roof
Or Highest Anticipated
Snow Level
12" MIN. TO ROOF
OR HIGHEST ANTICIPATED
SNOW LEVEL
90º or 45°
MEDIUM RADIUS ELBOWS
NOTE: Care should be taken to prevent condensate
accumulationsonroofingmaterial.
Alternate Vertical Termination (Single Pipe)
_____________________________________
12" TO GROUND OR
HIGHEST ANTICIPATED
SNOW LEVEL
MIN.
12"
FROM
WALL
HorizontalTermination(SinglePipe)
_____________________________________
VENT/FLUE TEE (
or
45° ELBOW
TURNED DOWN or
90° ELBOW TURNED
DOWN
OPTIONAL)
12" MIN. ABOVE
HIGHEST ANTICIPATED
SNOW LEVEL
12" MIN.
HorizontalTermination(SinglePipe)
AboveHighestAnticipatedSnowLevel
DIRECTVENT(DUALPIPE)PIPING
Theinletairscreensprovidedintheinstallationinstructionpacket
areavailablefortheinstallertouseintheinletofthecombustionair
pipetopreventanimals from buildingnests inthe combustion 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
abovethetopofthechimney. The space between the pipes and
thechimneymustbeclosedwithaweathertight,corrosionresis-
tantflashing. Boththecombustionairintakeandavent/fluepipe
terminations must be in the same atmospheric pressure zone.
Refer to Vent/Flue and Combustion Air Pipe - Termination Loca-
tionsor Concentric Vent Terminationfor specific detailsontermi-
nationconstruction. Fordetailsconcerningconnectionofpipesto
the furnace, refer to the Vent/Flue Pipe and Combustion Pipe -
StandardFurnaceConnectionsorAlternateFurnaceConnections.
VENT/FLUE &COMBUSTION AIR PIPE LENGTHS &DIAMETERS
Refertothefollowingtableforapplicablelength,elbows,andpipe
diameterforconstructionofthevent/flueandcombustionairintake
pipesystemsofadirectvent(dualpipe)installation. Thenumber
ofelbowstabulatedrepresentsthenumberofelbowsand/ortees
in each (Vent/Flue & CombustionAir Intake) pipe. If there is a
differencebetweenthetwopipes,countthepipewiththemost
fittings. Elbows and/or tees used in the terminations must be
included when determining the number of elbows in the piping
systems.
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 COMBUSTIONAIR PIPE TERMINATIONS
Thevent/flueandcombustionairpipesmayterminatevertically,as
througharoof,orhorizontally,asthroughanoutsidewall.
12345678
2 or 2 1/2 49 46 43 40 37 34 31 28
3 7168656259565350
2 or 2 1/2 36 33 30 27 24 21 18 15
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 listed are individual lengths for inlet & flue and NOT a combination.
Number of Elbows (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)
Standard
Alternate
60,000
80,000
100,000
115,000
19
12345678
2 or 2 1/2 49 46 43 40 37 34 31 28
3 7168656259565350
2 or 2 1/2 36 33 30 27 24 21 18 15
3 5754514845423936
2 or 2 1/2 61 58 55 52 49 46 43 40
3 7168656259565350
2 or 2 1/2 48 45 42 39 36 33 30 27
3 5754514845423936
Standard 3 7168656259565350
Alternate 3 57 54 51 48 45 42 39 36
*Maximum allowable limits listed are individual lengths for inlet & flue and NOT a combination.
80,000 Standard
Alternate
60,000 Standard
Alternate
Unit Input
(Btu) Termination
Style Pipe(4)
(inch) Number of Elbows (1)(2)(3)(5)
COUNTERFLOW
Direct Vent (Dual Pipe) Maximum Allowable Length*
of Vent/Flue & Combustion Air Intake Pipe (ft)
100,000
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 asis used witha plasticplumbingvent.
SCREEN
(OPTIONAL)
12" MIN. TO ROOF
OR HIGHEST ANTICIPATED
SNOW LEVEL
12" MIN.
V
ENT/FLUE
_____________________________________
V
ENT/FLUE
COMBUSTION
AIR INTAKE
SCREEN
(OPTIONAL)
12" MIN. TO ROOF
OR HIGHEST ANTICIPATED
SNOW LEVEL
12" MIN.
TEE (OPTIONAL)
VerticalTerminations(DualPipe)
Horizontalterminationsshouldbeasshowninthefollowingfigure.
RefertoVent/FluePipeandCombustionPipe-TerminationLoca-
tionfor locationrestrictions.A2 3/8”diameter wall penetrationis
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
damageto pipingconnections,a couplingshouldbe installedon
eithersideofthewallandsolvent cementedtoapipeconnecting
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
siliconecaulkingmaterial.
90º OR 45°
MEDIUM RADIUS
ELBOW
3" MIN
24" MAX
SCREEN
(OPTIONAL)
12" MIN. TO ROOF OR
HIGHEST ANTICIPATED
SNOW LEVEL
12" MIN. TO ROOF OR
HIGHEST ANTICIPATED
SNOW LEVEL
12" MIN
3" MIN
24" MAX
StandardHorizontalTerminations(DualPipe)
_____________________________________
24" MAX
3" MIN
SCREEN
(OPTIONAL)
24" MAX
AIR
INTAKE
90°
MEDIUM
RADIUS
ELBOW
12" MIN. ABOVE
HIGHEST ANTICIPATED
SNOW LEVEL
AlternateHorizontalVentTermination(DualPipe)
20
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.
Ifmore than onedirect vent furnaceisto beinstalledhorizontally
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
abovethe other. This kitis NOT intended forusewith singlepipe
(indirectvent)installations.
Refer to the directions furnished with the Side Wall Vent Kit
(p/n0170K00000S)forinstallationspecifications.
C
ONDENSATE
D
RAIN
L
INES
&D
RAIN
T
RAP
Acondensing gas furnaceachieves its highlevelof efficiencyby
extractingalmost allof the heatfrom theproductsof combustion
and cooling them to the point where condensation takes place.
Thecondensatewhichisgeneratedmustbepipedtoanappropri-
atedrainlocation.
In upright installations, the furnace’s drain hoses may exit either
therightorleftsideofthefurnace. NOTE:Ifthealternatevent/flue
outlet is utilized in an upright installation, the drain trap and drain
connections must be located on the same side as the alternate
vent/flueoutlet.
In horizontal installations, the drain hoses will exit through the
bottom (down side) of the unit with the drain trap suspended be-
neath the furnace. The field-supplied drain system must be in
accordancewithalllocalcodesandtheinstructionsinthefollow-
ing sections.
Follow the bullets listed below when installing the drain system.
Referto the followingsectionsfor specific detailsconcerningfur-
nacedrain trapinstallationanddrainhosehookups.
• Thedraintrapsuppliedwiththefurnacemustbeused.
• Thedrainlinebetweenfurnaceanddrainlocationmust
beconstructedof 3/4”PVC.
• Thedrainlinebetweenfurnaceanddrainlocationmust
maintaina1/4inchperfootdownwardslopetowardthe
drain.
• Donot trapthe drainline in anyother locationthan at
thedraintrapsuppliedwiththefurnace.
• Donotroutethedrainlineoutside where it may freeze.
• Ifthedrainlineisroutedthroughanareawhichmay
seetemperaturesnearorbelowfreezing,precautions
mustbetakentopreventcondensatefromfreezing
withinthe drainline.
• Ifan air conditioningcoilisinstalled withthe furnace,a
commondrain maybe used. Anopen tee mustbe
installed in the drain line, near the cooling coil, to
relievepositiveairpressurefromthecoil’splenum.
Thisisnecessarytoprohibitanyinterferencewiththe
functionofthefurnace’sdraintrap.
NOTE:Inverticalinstallations, airconditioningcoilcondensate
may drain into the furnace trap as long as there is a trap
betweenthecoil and thefurnace trapand thedrain pipeisnot
terminatingbelow thewaterlevel ofthefurnace trap.
Other manuals for MVM96 Series
1
This manual suits for next models
14
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