Goodman MH8 User manual

5151 San Felipe Suite 500 • Houston, TX 77056
www.goodmanmfg.com • www.amana-hac.com
©2009-2011 Goodman Manufacturing Company, L.P.
CUS
®
ATTENTION INSTALLING PERSONNEL
RECOGNIZE THIS SYMBOL AS A SAFETY PRECAUTION.
Installer: Affix all manuals adjacent to the unit.
Thesefurnacescomplywithrequirementsem-
bodiedintheAmericanNationalStandard/Na-
tional Standard of Canada ANSI Z21.47·CSA-
2.3GasFiredCentralFurnaces.
As a professional installer, you have an obligation to know the product better than the customer.
This includes all safety precautions and related items.
Priorto actual installation, thoroughly familiarizeyourself 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.
NOTE: Please contact your distributor or our website for the applicable Specification Sheet
referred to in this manual.
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
IO-359J
1/11
INSTALLATION INSTRUCTIONS FOR *M(H,S)8 / *D(H,S)8 / *HS8 / GME8 GAS FURNACE
(CATEGORYI)

2
Table of Contents
ADDITIONAL SAFETY CONSIDERATIONS ...................................................................................................... 6
SHIPPING INSPECTION ........................................................................................................................... 6
ELECTROSTATIC DISCHARGE (ESD)PRECAUTIONS ..................................................................................... 6
TOTHE INSTALLER .............................................................................................................................. 6
IMPORTANT NOTE TO THE OWNER REGARDING PRODUCT WARRANTY................................................................. 6
PRODUCT APPLICATION ............................................................................................................................... 9
LOCATION REQUIREMENTS AND CONSIDERATIONS .............................................................................................. 10
CLEARANCES AND ACCESSIBILITY ...........................................................................................................11
HORIZONTAL INSTALLATION ...................................................................................................................11
FURNACE SUSPENSION .........................................................................................................................11
EXISTING FURNACE REMOVAL ...............................................................................................................11
THERMOSTAT LOCATION ...................................................................................................................... 12
COMBUSTION AND VENTILATION AIR REQUIREMENTS .......................................................................................... 12
CATEGORY IVENTING (VERTICAL VENTING).................................................................................................... 13
EXTERIOR MASONRY CHIMNEYS (CATEGORY IFURNACES ONLY)......................................................................... 14
CHECKLIST SUMMARY ........................................................................................................................ 14
CHECK 1 -PROPER CHIMNEY TERMINATION. ............................................................................................. 15
CHECK 2-ANY SOLID OR LIQUID FUEL APPLIANCES VENTED INTO THIS CHIMNEY CHANNEL ...................................... 15
CHECK 3-CHIMNEY CROWN CONDITION................................................................................................. 16
CHECK 4-DEBRIS IN CLEANOUT .......................................................................................................... 16
CHECK 5-LINER CONDITION................................................................................................................ 16
CHECK 6-DILUTION AIR. ................................................................................................................... 16
CHECK 7-COMPLETE THE INSTALLATION. ............................................................................................... 16
FIX 1 - LINER TERMINATION ................................................................................................................. 17
FIX 2-CHANGE VENTING ARRANGEMENTS ............................................................................................... 17
FIX 3 -REBUILD THE CROWN ............................................................................................................... 17
FIX 4- RELINING .............................................................................................................................. 17
ELECTRICAL CONNECTIONS ........................................................................................................................ 18
WIRING HARNESS .............................................................................................................................. 18
115VOLT LINE CONNECTIONS ............................................................................................................. 18
FOSSIL FUEL APPLICATIONS ................................................................................................................ 18
JUNCTION BOX RELOCATION ................................................................................................................ 19
24VOLT THERMOSTAT WIRING ............................................................................................................ 19
GME8FURNACE WITH 2-STAGE CONDENSER FIELD WIRING ....................................................................... 19
SETTING THE HEAT ANTICIPATOR ........................................................................................................... 20
115 VOLT LINE CONNECTION OF ACCESSORIES ........................................................................................ 20
(ELECTRONIC AIR CLEANER) ................................................................................................................ 20
24VAC HUMIDIFIER .......................................................................................................................... 20
GAS SUPPLY AND PIPING ........................................................................................................................... 21
HIGH ALTITUDE DERATE ...................................................................................................................... 21
PROPANE GAS CONVERSION ................................................................................................................ 21
GAS PIPING CONNECTIONS .................................................................................................................. 22
UPFLOW INSTALLATIONS ..................................................................................................................... 22
COUNTERFLOW INSTALLATIONS.............................................................................................................. 23
GAS PIPING CHECKS ......................................................................................................................... 23
PROPANE GAS TANKS AND PIPING ......................................................................................................... 23

3
Table of Contents
CIRCULATING AIR AND FILTERS .................................................................................................................... 24
DUCTWORK -AIR FLOW...................................................................................................................... 24
CHECKING DUCT STATIC ..................................................................................................................... 24
FILTERS -READ THIS SECTION BEFORE INSTALLING THE RETURN AIR DUCTWORK ............................................ 25
UPRIGHT INSTALLATIONS ..................................................................................................................... 25
CIRCULATION AIR FILTERS ................................................................................................................... 25
HORIZONTAL INSTALLATIONS ................................................................................................................ 25
SEQUENCE OF OPERATION (INTEGRATED IGNITION CONTROL) ................................................................................ 25
POWER UP...................................................................................................................................... 25
HEATING MODE ................................................................................................................................. 26
(MODE DIP SWITCH IS SET TO “1 STG” POSITION).................................................................................. 26
(MODE DIPSWITCH IS SET TO “2 STG” POSITION)................................................................................. 26
COOLING MODE ................................................................................................................................26
FAN ONLY MODE .............................................................................................................................. 26
START-UP PROCEDURE AND ADJUSTMENT ....................................................................................................... 27
FURNACE OPERATION .......................................................................................................................... 27
FURNACE START-UP ........................................................................................................................... 27
FURNACE SHUTDOWN ......................................................................................................................... 27
GAS SUPPLY PRESSURE MEASUREMENT .................................................................................................. 27
GAS MANIFOLD PRESSURE MEASUREMENT AND ADJUSTMENT ....................................................................... 30
GAS INPUT RATE MEASUREMENT (NATURAL GAS ONLY) ............................................................................ 31
TEMPERATURE RISE ........................................................................................................................... 31
CIRCULATOR BLOWER SPEED ADJUSTMENT ............................................................................................. 32
CIRCULATOR BLOWER FAN TIMING ADJUSTMENT ...................................................................................... 32
SETTING FURNACE OPERATING MODE (*DH8, *ME8,AND *MH8MODELS ONLY) ............................................ 32
OPERATIONAL CHECKS .............................................................................................................................. 33
BURNER FLAME ................................................................................................................................33
AUXILIARY LIMIT CONTROL ................................................................................................................. 33
SAFETY CIRCUIT DESCRIPTION .................................................................................................................... 33
GENERAL ......................................................................................................................................... 33
INTEGRATED CONTROL MODULE ............................................................................................................. 33
PRIMARY LIMIT ................................................................................................................................33
AUXILIARY LIMIT ............................................................................................................................... 33
ROLLOUT LIMITS .............................................................................................................................. 34
PRESSURE SWITCHES ......................................................................................................................... 34
FLAME SENSOR ................................................................................................................................34
TROUBLESHOOTING ................................................................................................................................... 34
ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS ................................................................................... 34
DIAGNOSTIC CHART........................................................................................................................... 34
FAULT RECALL ................................................................................................................................34
RESETTING FROM LOCKOUT ................................................................................................................ 34

4
Table of Contents
MAINTENANCE ......................................................................................................................................... 34
ANNUAL INSPECTION ........................................................................................................................... 34
FILTERS .......................................................................................................................................... 35
FILTER MAINTENANCE ......................................................................................................................... 35
FILTER REMOVAL .............................................................................................................................. 35
INDUCED DRAFT AND CIRCULATOR BLOWER MOTORS ................................................................................. 35
FLAME SENSOR (QUALIFIED SERVICER ONLY) .......................................................................................... 35
IGNITER (QUALIFIED SERVICER ONLY) ..................................................................................................... 35
BURNERS ......................................................................................................................................... 35
BEFORE LEAVING AN INSTALLATION ............................................................................................................... 36
REPAIR AND REPLACEMENT PARTS .............................................................................................................. 36
TROUBLESHOOTING CHART ......................................................................................................................... 37
BLOWER PERFORMANCE DATA .................................................................................................................... 40
*M(H/S)8 ...................................................................................................................................... 39
*(D/H)S8 ...................................................................................................................................... 40
GME8 .......................................................................................................................................... 41
WIRING DIAGRAMS................................................................................................................................... 43
*MH8_CA/CB, *DH8_CA WIRING DIAGRAM..................................................................................... 43
*(M/D/H)S8 WIRING DIAGRAM .......................................................................................................... 44
GME8_CAWIRING DIAGRAM............................................................................................................ 45
*MH8_CC, *DH8_CB WIRING DIAGRAM .......................................................................................... 46
GME8_CB WIRING DIAGRAM ........................................................................................................... 47

5
S AFETY P RECAUTIONS
Adheretothefollowingwarningsandcautions when installing,adjusting, altering,servicing,oroperatingthefurnace. To
ensureproperinstallationandoperation,thoroughlyreadthismanualforspecificspertainingtothe installation and applica-
tion of this product.
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
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, directoutside
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

6
S AFETY P RECAUTIONS
T O  PREVENT  PERSONAL  INJURY  OR  DEATH  DUE  TO  ASPHYXIATION , THIS 
FURNACE  MUST  BE C ATEGORY I VENTED .D O  NOT  VENT  USING 
C
ATEGORY III VENTING .
P
ROVISIONS  MUST  BE  MADE  FOR  VENTING  COMBUSTION  PRODUCTS 
OUTDOORS  THROUGH  A  PROPER  VENTING  SYSTEM .T HE  LENGTH  OF 
FLUE  PIPE  COULD  BE  A  LIMITING  FACTOR  IN  LOCATING  THE  FURNACE .
WARNING
ADDITIONALSAFETYCONSIDERATIONS
• Thisfurnace is approved for CategoryIVenting only.
• Provisions must be made for venting combustion
products outdoors through a proper venting system.
The length of flue pipe could be a limiting factor in
locatingthe furnace.
SHIPPINGINSPECTION
All units are securely packed in shipping containers tested
according to International Safe Transit Association specifica-
tions. The carton must be checked upon arrival for external
damage. Ifdamageisfound,arequestforinspectionbycarrier’s
agent must be made in writing immediately.
Thefurnace must be carefully inspected on arrivalfordamage
and bolts or screws which may have come loose in transit. In
theevent of damage the consignee should:
1. Makeanotationondeliveryreceiptofanyvisibledamage
toshipmentorcontainer.
2. Notifycarrierpromptlyandrequestaninspection.
3. Withconcealed damage,carriermustbenotified assoon
aspossible - preferably within five days.
4. Filetheclaimwiththefollowingsupportdocumentswithin
a nine month statute of limitations.
• Original or certified copy of the Bill of Lading, or
indemnitybond.
• Originalpaidfreightbillorindemnityinlieuthereof.
• Originalor certified copy oftheinvoice, showing trade
andotherdiscountsor reductions.
• Copy of the inspection report issued by carrier’s
representativeatthetimedamageisreportedtocarrier.
Thecarrierisresponsible formaking promptinspectionofdam-
ageandforathoroughinvestigationofeachclaim.Thedistribu-
torormanufacturerwillnotacceptclaims fromdealers fortrans-
portationdamage.
Keep this literature in a safe place for future reference.
ELECTROSTATICDISCHARGE(ESD)PRECAUTIONS
NOTE: Dischargebody’s staticelectricitybefore touching unit.
Anelectrostatic discharge can adversely affect electricalcom-
ponents.
Use the following precautions during furnace installation and
servicing to protect the integrated control module from dam-
age. Byputtingthefurnace,thecontrol,andtheperson at the
sameelectrostatic potential, thesestepswillhelp avoid expos-
ing the integrated control module to electrostatic discharge.
Thisprocedure is applicabletoboth installed andnon-installed
(ungrounded)furnaces.
1. Disconnect all power to the furnace. Do not touch the
integrated control module or any wire connected to the
control prior to discharging your body’s electrostatic
chargeto ground.
2. Firmly touch a clean, unpainted, metal surface of the
furnaces near the control. Any tools held in a person’s
handduring grounding willbedischarged.
3. Service integrated control module or connecting wiring
following the discharge process in step 2. Use caution
nottorechargeyourbodywithstaticelectricity;(i.e.,do
notmoveorshuffleyour feet, do not touch ungrounded
objects,etc.). Ifyoucomeincontactwithanungrounded
object,repeatstep 2 before touching control or wires.
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 controls to their containers before touching any
ungroundedobject.
TOTHE INSTALLER
Before installing this unit, please read this manual thoroughly
to familiarize yourself with specific items which must be ad-
hered to, including but not limited to: unit maximum external
static pressure, gas pressures, BTU input rating, proper elec-
tricalconnections, circulating airtemperaturerise,minimum or
maximum CFM, and motor speed connections, and venting.
Thesefurnaces are designed forCategoryI venting only.
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
IMPORTANTNOTE TOTHEOWNERREGARDING PRODUCT
WARRANTY
Your warranty certificate is supplied as a separate document
withtheunit installedby your contractor.Readthelimited war-
ranty certificate carefully to determine what is and is not cov-
eredand keepthe warrantycertificatein asafeplace.Ifyou are
unable to locate the warranty certificate please contact your
installingcontractororcontactcustomerservice(877-254-4729)
to obtain a copy.
IMPORTANT: To receive the LifetimeHeatExchangerLimited
Warranty(good for aslongas you own yourhome)and the 10-
year Parts Limited Warranty, online registration must be com-
pleted within 60 days of installation. Online registration is not
required in California or Quebec. Complete warranty details
availablefrom your local dealeror atwww.goodmanmfg.com.

7
C OMPONENT I DENTIFICATION
躀
Pressure Switch
Tubular Heat Exchanger
Flue Pipe Connection
Gas Line Entrance
(Alternate)
Induced Draft Blower
Gas Line
Entrance
Gas Valve
Rollout Limit
Junction Box
Wiring Harness
Grommet
Gas Manifold
Inshot Burner
Blower Door
Interlock Switch
Integrated Control Module
Transformer
Circulator Blower
1
2
3
4
5
6
7
8
9
1 Tubular Heat Exchanger
2 Pressure Switch
3 Flue Pipe Connection
4 Induced Draft Blower
5 Gas Line Entrance
6 Gas Valve
7 Rollout Limit
8 Junction Box
9 Wiring Harness Grommet
10 Gas Manifold
11 Inshot Burner
12 Transformer
13 Integrated Control Module
14 Blower Door Interlock Switch
15 Circulator Blower
16 Gas Line Entrance (Alternate)

C OMPONENT I DENTIFICATION
8
1 TubularHeatExchanger
2 PressureSwitch
3 FluePipe Connection
4 InducedDraftBlower
5 GasLineEntrance
6 GasValve
7 RolloutLimit
8 JunctionBox
9 WiringHarness Grommet
10 GasManifold
11 InshotBurner
12 Transformer
13 IntegratedControlModule
14 BlowerDoorInterlockSwitch
15 CirculatorBlower
16 GasLineEntrance(Alternate)
Tubular Heat Exchanger
Flue Pipe Connection
Gas Line Entrance
(Alternate)
Induced Draft Blower
Gas Line
Entrance
Gas Valve
Rollout Limit
Junction Box
Wiring Harness
Grommet
Gas Manifold
Inshot Burner
Blower Door
Interlock Switch
Integrated Control Module
Transformer
Circulator Blower
1
Pressure Switch
23
4
5
6
7
8
9

9
P RODUCT A PPLICATION
• Returnairductsareprovidedandsealedtothefurnace.
• A return air temperature range between 60ºF (16ºC)
and80ºF(27ºC)ismaintained.
• Air filters are installed in the system and maintained
during construction, replaced as appropriate during
construction,and uponcompletionof constructionare
replaced.
• The input rate and temperature rise are set per the
furnace ratingplate.
• 100% outside air is provided for combustion air
requirementsduring construction.Temporaryducting
can be used.
NOTE: Do not connect the temporary duct directly to
the furnace. The duct must be sized according to the
instructions under Combustion and Ventilation Air
Requirements,Section5.3.3.
•The furnace heat exchanger, components, duct
system,airfilters and evaporator coils are thoroughly
cleanedfollowingfinal construction clean up.
• Allfurnaceoperatingconditions(includingignition,input
rate, temperature rise and venting) are verified
according to these installation instructions.
NOTE: TheCommonwealthofMassachusettsrequiresthatthe
followingadditionalrequirementsmustalsobemet:
• Gasfurnaces must beinstalledbya licensed plumber
orgas fitter.
• AT-handle gas cock must be used.
• Ifthe unit is to beinstalledinan attic, the passageway
to and the service area around the unit must have
flooring.
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
To ensure proper furnace operation, install, operate and
maintain the furnace in accordance with these installa-
tion and operation instructions, all local building codes
and ordinances. In their absence, follow the latest edition of
the National Fuel Gas Code (NFPA 54/ANSI Z223.1), and/or
CAN/CSA B149 Installation Codes, local plumbing or waste
watercodes,andotherapplicablecodes.
Acopy oftheNationalFuel Gas Code (NFPA54/ANSIZ223.1)
canbeobtainedfromanyofthefollowing:
American National Standards Institute
1430Broadway
New York, NY 10018
National Fire Protection Association
1 Batterymarch Park
Quincy, MA 02269
CSA International
8501 East Pleasant Valley
Cleveland,OH44131
To register your Goodman brand unit, go to
www.goodmanmfg.com. Click on theword“Warranty”located
on the left side of the home page. Next, click on the word
“Product Registration” located on the left side of the Warranty
page and complete the forms in the manner indicated on the
ProductRegistration page.
Toregister yourAmanabrand unit,go towww.amana-hac.com.
Click on the word “Warranty” located on the top right of the
home page. Next, click on the word “Product Registration”
locatedonthe left side of the Warranty page andcompletethe
formsinthemannerindicatedon theProductRegistrationpage.
Productlimitedwarrantycertificates formodelscurrentlyinpro-
ductioncanbeviewedatwww.goodmanmfg.comorwww.amana-
hac.com. If your model is not currently in production or does
not appear on the website, please contact your installing con-
tractoror contact customer service (877-254-4729)toobtaina
copyofyourwarranty certificate.
Eachproduct overview pagecontainsa Product Warranty link;
by clicking on it you will be able to view the limited warranty
coverageforthatspecific product.To viewwarranty registration
information,click on the Product Warranty textontheleftnavi-
gation panel on the home page of each website. The Online
Product Registration pages are located in this same section.
P RODUCT A PPLICATION
Thisfurnace is primarilydesignedfor residential home-heating
applications. It is NOT designed or certified for use in mobile
homes,trailersorrecreationalvehicles. Neitherisitdesigned
or certified for outdoor applications. The furnace must be in-
stalled indoors (i.e., attic space, crawl space, or garage area
providedthe garage area is enclosedwithanoperating door).
This furnace can be used in the following non-industrial com-
mercialapplications:
Schools,Officebuildings,Churches,Retailstores,
Nursinghomes,Hotels/motels,Commonorofficeareas
In such applications , the furnace must be installed with the
followingstipulations:
• It must be installed per the installation instructions
providedand per local and nationalcodes.
• It must be installed indoors in a building constructed
on site.
• It must be part of a ducted system and not used in a
freeair deliveryapplication.
• It must not be used as a “make-up” air unit.
• All other warranty exclusions and restrictions apply.
Thisfurnacemaybe used as a construction site heater ONLY
ifthefollowingconditions are met:
• The vent system is permanently installed per these
installation instructions.
• Aroomthermostat isusedtocontrolthefurnace.Fixed
jumpersthat provide continuousheatingCANNOT be
used.

10
L OCATION R EQUIREMENTS AND C ONSIDERATIONS
A copy of the CAN/CSA B149 Installation Codes can also be
obtainedfrom: CSA International
178RexdaleBoulevard
Etobicoke,Ontario,CanadaM9W1R3
The rated heating capacity of the furnace should be greater
than or equal to the total heat loss of the area to be heated.
Thetotalheat lossshouldbecalculatedby anapprovedmethod
orinaccordancewith “ASHRAEGuide” or“ManualJ-LoadCal-
culations” published by the Air Conditioning Contractors of
America.
Inthe USA, this furnace MUST beinstalledinaccordance with
thelatest edition of theANSI Z223.1booklet entitled “National
Fuel Gas Code” (NFPA54), and the requirements or codes of
thelocal utilityorotherauthority havingjurisdiction.In Canada,
this furnace must be installed in accordance with the current
CAN/CGA-B149.1&2GasInstallationCodes,localplumbing
or waste water codes and other applicable codes. Additional
helpful publications available from the NFPAare, NFPA90A-
InstallationofAirConditioningandVentilatingSystemandNFPA
90B - WarmAir Heating andAir Conditioning System.
AllventingshallbeinaccordancewithPART7,VentingofEquip-
ment, of the National Fuel Gas Code,ANSI Z223.1, or appli-
cablelocalbuilding and/or air conditioning codes. These pub-
licationsare available from:
National Fire Protection Association, Inc.
Batterymarch Park, Quincy, MA 02269
NOTE: Furnaces with NOx screens meet the California NOx
emission standards and California seasonal efficiency stan-
dards.ANNUALinspectionsof the furnace and itsvent system
isstronglyrecommended.
L OCATION R EQUIREMENTS AND C ONSIDERATIONS
Yourunitmodeltypedetermines which installationprocedures
must be used. For *MH8, *MS8, and GHS8 models, you must
follow instructions for Horizontal Left, Horizontal Right or Up-
flow installations only. These furnaces are not approved for
Downflowinstallations.
DownflowmodelsGD(H,S) ARE NOTAPPROVEDFOR HORI-
ZONTAL OR UPFLOW INSTALLATIONS.For these models,
use only the instructions for downflow installation only.
T O  PREVENT  POSSIBLE  EQUIPMENT  DAMAGE , PROPERTY  DAMAGE ,
PERSONAL  INJURY  OR  DEATH , THE  FOLLOWING  BULLET  POINTS  MUST  BE 
OBSERVED  WHEN  INSTALLING  THIS  UNIT .
WARNING
Follow the instructions listed below when selecting a furnace
location. Refer also to the guidelines provided in Section V,
CombustionandVentilationAir Requirements.
• Centrally locate the furnace with respect to the
proposed or existing air distribution system.
• Ensure the temperature of the return air entering the
furnaceis between 55°F and 100°Fwhenthefurnace
is heating.
• If the furnace is installed in an application where the
typical operating sound level of a furnace is deemed
objectionable, an optional sound reduction kit is
available.Consultyourlocaldistributorformoredetails.
• Provisions must be made for venting combustion
products outdoors through a proper venting system.
The length of flue pipe could be a limiting factor in
locatingthe furnace.
• Ensure adequate combustion air is available for the
furnace. Improper or insufficient combustion air can
exposebuildingoccupantstogascombustionproducts
thatcould include carbonmonoxide. RefertoSection
V, Combustion and VentilationAir Requirements.
• The furnace must be level. If the furnace is to be set
onafloorthatmaybecomewetordampat times, the
furnace should be supported above the floor on a
concretebasesizedapproximately 1-1/2" larger than
thebaseofthefurnace.
• Ensureupflow or horizontal furnaces arenotinstalled
directly on carpeting, or any other combustible
material. The only combustible material allowed is
wood.
• Exposure to contaminated combustion air will result
in safety and performance-related problems. Do not
installthefurnacewherethecombustionairisexposed
tothe following substances:
chlorinated waxes or cleaners
chlorine-based swimming pool chemicals
water softening chemicals
deicing salts or chemicals
carbon tetrachloride
halogen type refrigerants
cleaning solutions (such as perchloroethylene)
printing inks
paint removers
varnishes
hydrochloric acid
cements and glues
antistatic fabric softeners for clothes dryers
and masonry acid washing materials
• Ifthe furnace isusedin connection withacooling unit,
install the furnace upstream or in parallel with the
cooling unit coil. Premature heat exchanger failure
willresultifthe cooling unit coil is placed ahead of the
furnace.
• If the furnace is installed in a residential garage,
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
damageby vehicles.
• If the furnace is installed horizontally, the furnace
accessdoorsmustbevertical so that the burners fire
horizontally into the heat exchanger. Do not install
theunitwiththeaccess doorson the“up/top”or“down/
bottom”sideofthefurnace.