Goodman MVM96 Series User manual

5151 San Felipe Suite 500
Houston, TX 77056
www.goodmanmfg.com • www.amana-hac.com
©2011 - 2013 Goodman Manufacturing Company, L.P.
I NSTALLATION I NSTRUCTIONS FOR *MVM96 & *CVM96
M
ODULATING G AS F URNACE
IO-406E
05/13
(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
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
SAFETY CONSIDERATIONS ...................................... 4
SHIPPING INSPECTION............................................ 5
ELECTROSTATIC DISCHARGE (ESD)
PRECAUTIONS ....................................................... 5
TOTHE INSTALLER ................................................ 5
IMPORTANT NOTE TO THE OWNER REGARDING
PRODUCT WARRANTY ......................................... 6
Product Description ............................................... 6
FEATURES............................................................ 6
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 ........................................... 13
Horizontal Applications & Considerations ....... 14
FURNACE SUSPENSION ........................................ 14
DRAIN TRAP AND LINES ....................................... 14
LEVELING .......................................................... 14
ALTERNATE ELECTRICAL AND
GAS LINE CONNECTIONS.................................. 14
DRAIN PAN ........................................................ 14
FREEZE PROTECTION ........................................... 14
Propane Gas/High Altitude Installations........... 14
Vent/Flue Pipe & Combustion Air Pipe.............. 15
DUAL CERTIFICATION: NON-DIRECT/DIRECT VENT .... 15
MATERIALS AND JOINING METHODS ...................... 15
PROPER VENT/FLUE AND COMBUSTION AIR
PIPING PRACTICES .......................................... 17
TERMINATION LOCATIONS ..................................... 17
SPECIAL VENTING REQUIREMENTS FOR
INSTALLATIONS INCANADA ................................ 19
STANDARD FURNACE CONNECTIONS ................................ 19
COMBUSTION AIR PIPE ................................................. 19
ALTERNATE FURNACE CONNECTIONS ............................... 20
NON-DIRECT VENT (SINGLE PIPE) PIPING ....................... 21
DIRECT VENT (DUAL PIPE) PIPING ................................. 22
VENT/INTAKE TERMINATIONS FOR
INSTALLATION OF MULTIPLE
DIRECT VENT FURNACES .................................. 23
CONCENTRIC VENT TERMINATION ........................... 23
SIDE WALL VENT KIT ........................................... 24
CondensateDrainLines & DrainTrap..................... 24
STANDARD RIGHT OR LEFT SIDE
DRAIN HOSE CONNECTIONS ............................. 24
UPRIGHT INSTALLATIONS-TRAP
ON RIGHT SIDE ............................................... 24
UPRIGHT INSTALLATIONS-TRAP
ON LEFT SIDE ................................................. 25
HORIZONTAL INSTALLATIONS .................................... 26
ElectricalConnections ............................................. 27
WIRING HARNESS ................................................. 28
115VOLT LINE CONNECTIONS ................................. 28
JUNCTION BOX RELOCATION ................................... 28
24VOLT THERMOSTAT WIRING ................................ 28
SINGLE-STAGE HEATING
THERMOSTAT APPLICATION ................................ 29
24VOLT DEHUMIDISTAT WIRING .............................. 30
FOSSIL FUEL APPLICATIONS .................................... 30
LINE VOLTAGE ACCESSORIES
(ELECTRONIC AIR CLEANER AND HUMIDIFIER) ..... 30
24VOLT HUMIDIFIER ............................................. 31
GasSupplyandPiping ............................................ 31
HIGH ALTITUDE DERATE .......................................... 31
PROPANE GAS CONVERSION ................................... 31
GAS PIPING CONNECTIONS ..................................... 31
PROPANE GAS TANKS AND PIPING ............................ 34
CirculatingAir&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
StartupProcedure&Adjustment ............................ 37
HEATING OPERATION WITH CTK01 THERMOSTAT
(COMMUNICATING)........................................... 38
HEATING OPERATION WITH
CTK02** & CTK03** THERMOSTAT
(MODULATING COMMUNICATING) ....................... 38
HEAT ANTICIPATOR SETTING .................................. 38
CONDENSATE DRAIN TRAP PRIMING ...................... 38
FURNACE OPERATION .......................................... 38
GAS SUPPLY PRESSURE MEASUREMENT ............... 39
GAS MANIFOLD PRESSURE MEASUREMENT ........... 40
GAS INPUT RATE MEASUREMENT
(NATURAL GAS ONLY) ..................................... 40
TEMPERATURE RISE ............................................ 41
CIRCULATOR BLOWER SPEEDS ................................ 41
BLOWER HEAT OFF DELAY TIMINGS .......................... 43
ComfortNet™ System .............................................. 43
OVERVIEW .......................................................... 43
AIRFLOW CONSIDERATIONS ..................................... 43

3
TABLEOFCONTENTS
DIPSwitches ............................................................ 45
NETWORK TROUBLESHOOTING .................................. 46
SYSTEM TROUBLESHOOTING .................................... 46
FAULT RECALL SEQUENCE ...................................... 46
FAULT CLEAR SEQUENCE: ...................................... 47
NormalSequenceofOperation ............................... 47
POWER UP......................................................... 47
HEATING MODE .................................................... 47
COOLING MODE .................................................... 48
FAN ONLY MODE .................................................. 48
OperationalChecks ................................................. 48
SafetyCircuitDescription........................................ 48
FURNACE CONTROL BOARD .................................... 48
PRIMARY LIMIT ..................................................... 48
AUXILIARY LIMIT ................................................... 48
ROLLOUT LIMIT .................................................... 48
PRESSURE SWITCHES ............................................ 49
FLAME SENSOR .................................................... 49
Troubleshooting....................................................... 49
ELECTROSTATIC DISCHARGE (ESD)PRECAUTIONS ....... 49
DIAGNOSTIC CHART ............................................... 49
RESETTING FROM LOCKOUT .................................... 49
Maintenance ............................................................. 49
ANNUAL INSPECTION .............................................. 50
FILTERS .............................................................. 50
BURNERS ............................................................ 50
INDUCED DRAFT AND CIRCULATOR BLOWERS ............... 50
CONDENSATE TRAP AND DRAIN SYSTEM
(QUALIFIED SERVICER ONLY) ............................... 50
FLAME SENSOR (QUALIFIED SERVICER ONLY) ............. 50
BeforeLeavinganInstallation ................................. 51
RepairandReplacementParts ................................ 51
TroubleshootingCodes ........................................... 52
WiringDiagram ........................................................ 58
SpecialInstructionsforProductsInstalled
in theState ofMassachusetts ........................ 59

4
SAFETYCONSIDERATIONS
Adhere to the following warnings and cautions when install-
ing,adjusting,altering,servicing,oroperating the furnace. To
ensureproperinstallation andoperation, thoroughlyread this
manualforspecifics pertainingto theinstallationandapplica-
tion of this product.
Thisfurnace ismanufactured for usewith natural gas.It may
be field converted to operate on L.P. gas by using the appro-
priate L.P. conversion kit listed in the PROPANE GAS/HIGH
ALTITUDE INSTALLATIONS section ofthismanual
Installthis furnace onlyina locationand positionasspecified
in LOCATION REQUIREMENTS & CONSIDERATIONS sec-
tionand INSTALLATION POSITIONS sectionofthismanual.
Provide adequate combustion and ventilation air to the fur-
nace as specified in COMBUSTION & VENTILATION AIR
REQUIREMENTS section of this manual.
Combustion products must be discharged to the outdoors.
Connect this furnace to an approved vent system only, as
specified in VENT/FLUE PIPE & COMBUSTION AIR PIPE
section of this manual.
Never test for gas leaks with an open flame. Use a commer-
ciallyavailable soapsolutionmade specificallyfor the detec-
tion of leaks to check all connections, as specified in GAS
SUPPLYAND PIPING section of this manual.
Always install a furnace to operate within the furnace’s in-
tendedtemperature-rise rangewitha ductsystemwhich has
externalstatic pressurewithinthe allowablerange, as speci-
fiedonthefurnaceratingplateandOPERATIONAL CHECKS
section ofthese instructions.
When a furnace is installed so that supply ducts carry air
circulatedby thefurnaceto areasoutside the spacecontain-
ingthe furnace, thereturnairshall alsobe handledbyduct(s)
sealedto the furnacecasingandterminatingoutsidethespace
containingthefurnace.
Agas-firedfurnaceforinstallationin a residential garagemust
beinstalledas specifiedin theLOCATION REQUIREMENTS
AND CONSIDERATIONS section ofthis manual.
Thisfurnace may beused asaconstruction site heateronlyif
certain conditions are met. These conditions are listed in the
PRODUCTAPPLICATION section of thismanual.
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
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
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

5
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
SHIPPINGINSPECTION
All units are securely packed in shipping containers tested ac-
cording to International Safe Transit Association specifications.
Thecartonmustbecheckeduponarrivalforexternaldamage. If
damageisfound,arequestforinspectionbycarrier’sagentmust
bemadeinwritingimmediately.
Thefurnacemustbecarefullyinspectedonarrivalfordamageand
boltsorscrewswhichmayhavecomelooseintransit. Intheevent
ofdamagetheconsigneeshould:
1. Make anotationondeliveryreceiptofanyvisibledamage
toshipmentor container.
2. Notifycarrierpromptlyandrequestaninspection.
3. With concealeddamage,carriermust be notifiedas soon
aspossible- preferablywithinfivedays.
4. File the claim with the following support documents within
a nine month statute of limitations.
• OriginalorcertifiedcopyoftheBillofLading,orindemnity
bond.
• Originalpaidfreightbillorindemnityinlieuthereof.
• Original or certified copy of the invoice, showing trade
andotherdiscountsorreductions.
• Copy of the inspection report issued by carrier’s
representativeatthetimedamageisreportedtocarrier.
Thecarrierisresponsibleformakingpromptinspectionofdamage
and for a thorough investigation of each claim. The distributor or
manufacturerwillnotacceptclaimsfromdealersfortransportation
damage.
ELECTROSTATICDISCHARGE(ESD)PRECAUTIONS
NOTE: Discharge body’s static electricity before touching unit.
Anelectrostaticdischargecanadverselyaffectelectricalcompo-
nents.
Usethefollowingprecautionsduringfurnaceinstallationandser-
vicingto protect theintegrated control modulefromdamage. By
puttingthe furnace,thecontrol,andthepersonatthesameelec-
trostatic potential, these steps will help avoid exposing the inte-
gratedcontrolmoduletoelectrostaticdischarge. Thisprocedure
isapplicabletobothinstalledandnon-installed(ungrounded)fur-
naces.
1. Disconnect all power to the furnace. Do not touch the
integrated control module or any wire connected to the
controlprior todischargingyourbody’selectrostatic charge
toground.
2. Firmly touch a clean, unpainted, metal surface of the
furnaces near the control. Any tools held in a person’s
handduringgroundingwillbedischarged.
3. Service integrated control module or connecting wiring
followingthedischargeprocessinstep2. Usecautionnot
to recharge your body with static electricity; (i.e., do not
moveorshuffleyourfeet,donottouchungroundedobjects,
etc.). If you come in contact with an ungrounded 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.

6
IMPORTANTNOTETOTHEOWNERREGARDINGPRODUCTWAR-
RANTY
Your warrantycertificateis suppliedas a separatedocument
with 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 con-
tactyour installingcontractororcontactcustomerservice(877-
254-4729)to obtain a copy.
ToreceivetheLifetimeHeatExchangerLimitedWarranty(good
for as long as you own your home) and the 10-year Parts
LimitedWarranty, online registration must be completed within
60 days of installation. Online registration is not required in
CaliforniaorQuebec. Completewarrantydetailsareavailable
fromyour localdealeror, forGoodman®brandproducts,visit
www.goodmanmfg.com,and forAmana®brandproducts,visit
www.amana-hac.com.
To register your Goodman®brand unit, go to
www.goodmanmfg.comandclick“WarrantyRegistration”.Com-
pletethe registrationasprompted.
ToregisteryourAmana®brandunit,gotowww.amana-hac.com
andclick on “WarrantyRegistration”. Completethe registra-
tionas prompted.
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.
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* thermostatkitallowsthisfurnacetobeinstalledaspartof
a digitally communicating system. The ComfortNet system pro-
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-
sure created by the draft inducer. The furnace control board
receives commands from the room thermostat. The furnace
controlboardthen controlsthe RPM ofthe (3phase)inducer
by varying the frequency and voltage to the inducer. This is
knownas variablefrequency drive (VFD).The inducer, pres-
sureswitches, and gasvalveare linkedbypneumatic tubing.
Thegas valvemodulatesbased on thisnegative pressure.
BLOWER COMPARTMENT BURNER COMPARTMENT
1
2
3
4
56787
910
11
3
12
13
14
15
16 18
19 20
23 25
26 27
28
21
20
1918
31 17
*
*
*
*
*
*
*
*
*
33
UPFLOW/HORIZONTAL
BLOWER COMPARTMENT
1
97874
6
12
13
21
20
19
18
31
3
24
23
25
32
526
27 10
28
3
1514
16
1819
20
2
11
17
30
29
33
COUNTERFLOW/HORIZONTAL

7
1 Gas Valve
2 Gas Line Entrance (Alternate)
3 Pressure Switch(es)
4 Gas Manifold
5 Combustion Air Intake Connection
6 Hot Surface Igniter
7 Rollout Limit
8 Burners
9 Flame Sensor
10 Flue Pipe Connection
11 Flue Pipe
12 Primary Limit
13 Gas Line Entrance
14 Flue Pipe Connection (Alternate)
15 Rubber Elbow
16 Variable-Speed Induced Draft Blower
17 Electrical Connection Inlets (Alternate)
18 Coil Front Cover Pressure Tap
19 Coil Front Cover Drain Port
20 Drain Line Penetrations
21 Drain Trap
22 Blower Door Interlock Switch
23 Inductor (Not All Models)
24 Two-Stage Integrated Control Module
(with fuse and diagnostic LED)
25 24 Volt Thermostat Connections
26 Transformer (40 VA)
27 ECM Variable Speed Circulator Blower
28 Auxiliary Limit
29 Junction Box
30 Electrical Connection Inlets
31 Coil Front Cover
32 Combustion Air Inlet Pipe (*CVM96 only)
33 "H" Fitting
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.
• It must be installed as a two-pipe system.
• AllotherwarrantyexclusionsandrestrictionsapplyThis
furnace is an ETL dual-certified appliance and is
appropriateforusewithnaturalorpropanegas(NOTE: If
usingpropane,apropaneconversionkitisrequired).
Dual certification means that thecombustion 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.
• 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

8
B149.1InstallationCodes,localplumbingorwastewatercodes,
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.
AcopyoftheCAN/CSA B149.1 InstallationCodescanalsobe
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
deicing salts or chemicals
carbontetrachloride
halogentyperefrigerants
cleaningsolutions(suchasperchloroethylene)
printinginks
paintremovers
varnishes
hydrochloricacid
cementsandglues
antistaticfabricsoftenersforclothesdryers
andmasonryacidwashingmaterials
• Isolateanon-directfurnacefromanareacontaminated
by any of the above substances. This protects the
non-directventfurnacefromairbornecontaminants. To
ensurethattheenclosednon-directventfurnacehasan
adequatesupplyofcombustionair,air must beducted
infromanearbyuncontaminatedroomorfromoutdoors.
RefertotheCombustionandVentilationAirRequirements
fordetails.

9
• If the furnace is used in connection with a cooling
unit, install the furnace upstream or in parallel with
the cooling coil. Premature heat exchanger failure
willresult if thecoolingcoil isplaced upstreamofthe
furnace.
For vertical (upflow or downflow) applications, the
minimum cooling coil width shall not be less than
furnace width minus 1”. Additionally, a coil installed
aboveanupflowfurnaceorunderacounterflowfurnace
maybethesame width asthe furnace ormay beone
size larger than the furnace. Example: a “C” width
coil may be installed with a “B” width furnace.
Forupflowapplications,thefrontofthecoilandfurnace
must face the same direction.
• 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
POSITION SIDES REAR FRONT BOTTOM FLUE TOP
Upflow 0" 0" 3" C 0" 1"
Horizontal 6" 0" 3" C 0" 6"
*MVM96* MINIMUM CLEARANCE TO COMBUSTIBLE MATERIALS
(INCHES)
C = If placed on combustible floor, floor MUST be wood only.
NOTES:
• For servicing or cleaning, a 24” front clearance is required.
• Unit connections (electrical, flue and drain) may necessitate
greater clearances than the minimum clearances listed above.
• In all cases, accessibility clearance must take precedence over
clearances from the enclosure where accessibility clearances
are greater.
POSITION SIDES REAR FRONT BOTTOM FLUE TOP
Downflow 0" 0" 3" NC 0" 1"
Horizontal 6" 0" 3" C 0" 6"
*CVM96* MINIMUM CLEARANCE TO COMBUSTIBLE MATERIALS
(INCHES)
C = If placed on combustible floor, floor MUST be wood only.
NC = For installation on non-combustible floors only. A combustible subbase
must be used for installations on combustible flooring.
NOTES:
• For servicing or cleaning, a 24” front clearance is required.
• Unit connections (electrical, flue and drain) may necessitate
greater clearances than the minimum clearances listed above.
• In all cases, accessibility clearance must take precedence over
clearances from the enclosure where accessibility clearances
are greater.
Installationsmustadheretotheclearancestocombustiblemate-
rialstowhichthisfurnacehasbeendesigncertified. Theminimum
clearanceinformationforthisfurnaceisprovidedontheunit’sclear-
ancelabel. Theseclearancesmustbepermanentlymaintained.
Clearancesmustalsoaccommodateaninstallation’sgas,electri-
cal,anddraintrapanddrainlineconnections. NOTE: Inaddition
totherequiredclearancestocombustiblematerials,aminimumof
24inchesserviceclearancemustbeavailableinfrontoftheunit.
TOP
BOTTOM
SIDE SIDE SIDE
TOP
BOTTOM
Upflow Counterflow Horizontal
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-
nectedtotheventingsystemplacedinoperation,whileanyother
appliancesconnectedtotheventingsystemarenotinoperation:
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
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/or NationalGasand Propane Installation
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.
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
starvingappliancesof air.
Housedepressurizationcancausebackdraftingorimpropercom-
bustionofgas-firedappliances,therebyexposingbuildingoccu-
pantstogascombustionproductsthatcouldincludecarbonmon-
oxide.
Whenthe furnace isinstalledas a directvent(2-pipe system)
furnace, no special provisions for air for combustion are re-
quired. However, if this furnace is to be installed in the same
spacewithothergasappliances,suchasawaterheater,ensure
thereisanadequatesupplyofcombustionandventilationairfor
the other appliances. Refer to the latest edition of the National
FuelGasCodeNFPA54/ANSIZ223.1orCAN/CSAB149Instal-
lationCodesorapplicableprovisionsofthelocalbuildingcodes
for determining the combustion air requirements for the appli-
ances.
Most homes will require outside air be supplied to the furnace
area by means of ventilation grilles or ducts connecting directly
totheoutdoorsorspacesopentotheoutdoorssuchasatticsor
crawl spaces.
The following information on air for combustion and ventilation is
reproduced from the National Fuel Gas Code NFPA 54/ANSI
Z223.1 Section 9.3.
9.3* Air for Combustion and Ventilation.
9.3.1 General.
9.3.1.1 Air for combustion, ventilation, and dilution of flue gases for
appliances installed in buildings shall be obtained by application of one of
the methods covered in 9.3.2 through 9.3.6. Where the requirements of
9.3.2 are not met, outdoor air shall be introduced in accordance with meth-
ods covered in 9.3.3 through 9.3.6.
Exception No. 1: This provision shall not apply to direct vent appliances.
9.3.1.2 Appliances of other than natural draft design and other than Cat-
egory 1 vented appliances shall be provided with combustion, ventilation,
and dilution air in accordance with the appliance manufacturer’s instruc-
tions.
9.3.1.3 Appliances shall be located so as not to interfere with proper
circulation of combustion, ventilation, and dilution air.