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.

11
L OCATION R EQUIREMENTS AND C ONSIDERATIONS
TOP
B1-VENT SINGLE (PLENUM)
1" 6" 1" 3" 0" 1"
VENT SIDES FRONT BACK
Top clearance for horizontal configuration - 1"
HORIZONTALINSTALLATION
Linecontacttoframingis permitted when installed in the hori-
zontal configuration. Line contact is defined as the portion of
the cabinet that is formed by the intersection of the top and
side. ACCESSIBILITY CLEARANCE, WHERE GREATER,
SHOULDTAKEPRECEDENCEOVERMINIMUM FIREPRO-
TECTIONCLEARANCE. Agas-fired furnace forinstallationin
aresidentialgarage mustbe installedsothattheignitionsource
and burners are located not less than eighteen inches (18")
abovethefloorandis protected or located to prevent physical
damage by vehicles. Agas furnace must not be installed di-
rectly on carpeting, tile, or other combustible materials other
thanwood flooring.
FURNACESUSPENSION
Ifsuspendingthe furnacefromraftersorjoist,use3/8"threaded
rod and 2”x2”x3/8” angle iron as shown below. The length of
rod will depend on the application and the clearances neces-
sary.
Suspended Furnace
EXISTINGFURNACE REMOVAL
NOTE: When an existing furnace is removed from a venting
system serving other appliances, the venting system may be
toolargeto properly vent the remaining attached appliances.
The following vent testing procedure is reproduced from the
American National Standard/National Standard of
Canada for Gas-Fired Central Furnaces ANSI Z21.47-Lat-
estEdition, CSA-2.3-Latest Edition Section 1.23.1. Thefol-
lowingstepsshallbefollowedwitheachapplianceconnected
totheventingsystemplacedin operation, while any other ap-
pliancesconnected to the ventingsystemarenot in operation:
a. Seal any unused openings in the venting system;
• Do not connect this furnace to a chimney flue that
serves a separate appliance designed to burn solid
fuel.
• For counterflow installations, the air conditioning coil
must be downstream from the heat exchanger of the
furnace.
•Counterflowinstallationover a noncombustible floor.
Before setting the furnace over the plenum opening,
ensurethe surface around the opening is smooth and
level.Atightsealshouldbe madebetweenthefurnace
base and floor by using a silicon rubber caulking
compoundorcement grout.
• Counterflow installation over a combustible floor. If
installation over a combustible floor becomes
necessary, use an accessory subbase (see
SpecificationSheetapplicabletoyourmodelfordetails).
Aspecial accessorysubbasemust be usedforupright
counterflow unit installations over any combustible
material including wood. Follow the instructions with
thesubbaseforproperinstallations.Donotinstallthe
furnacedirectly oncarpeting,tile, orothercombustible
materialotherthanwoodflooring.(NOTE:Thesubbase
willnot berequiredif anair conditioningcoilis installed
betweenthe supplyairopening onthe furnaceandthe
floor.
Top - 1"
Side
Clearance - 1"
Back - 0"
Front Clearance - 3"
V
ent Pipe Clearance to Combustibles-
6" using Single Wall Connector or 1"
using B-1 vent.
• Adequatecombustion/ventilation air mustbesupplied
to the closet.
• Furnacemust be completely sealedto floor or base.
Combustion/ventilationairsupplypipesmustterminate
12"fromtopof closet and 12" from floor of closet. DO
NOTremove solid base plate for sidereturn.
• Return air ducts must be completely sealed to the
furnaceand terminateoutsidethe enclosuresurfaces.
CLEARANCESAND ACCESSIBILITY
Unobstructed front clearance of 24" for servicing is recom-
mended.

12
C OMBUSTION & V ENTILATION C ATEGORY I V ENTING A IR R EQUIREMENTS
b. Inspect the venting system for proper size and
horizontalpitch,as required by the National Fuel Gas
Code,ANSIZ223.1or theCAN/CSAB149Installation
Codesand these instructions. Determine thatthereis
noblockageorrestriction,leakage,corrosionandother
deficiencieswhichcouldcauseanunsafecondition;
c. In so far as practical, close all building doors and
windows and all doors between the space in which
theappliance(s)connected to the venting system are
located and other spaces of the building. Turn on
clothes dryers and any appliance not connected to
the venting system. Turn on any exhaust fans, such
asrange hoods andbathroomexhausts,so they shall
operateatmaximumspeed. Donot operateasummer
exhaustfan. Close fireplace dampers;
d. Follow the lighting instructions. Place the appliance
being inspected in operation. Adjust thermostat so
applianceshalloperate continuously;
e. Test for drafthood equipped appliance spillage at the
drafthoodrelief openingafter5minutesofmainburner
operation. Use the flame of a match or candle;
f. After it has been determined that each appliance
connectedto the venting system properlyventswhen
tested as outlined above, return doors, windows,
exhaust fans, fireplace dampers and any other gas
burningapplianceto their previous conditions of use;
g. Ifimproper ventingisobservedduringany oftheabove
tests,the common ventingsystemmust be corrected.
Corrections must be in accordance with the latest edition of
theNationalFuelGasCodeNFPA54/ANSIZ223.1and/orCAN/
CSAB149 Installation Codes.
Ifresizing is required onanyportionof the venting system,use
the appropriate table inAppendix G in the latest edition of the
National Fuel Gas CodeANSI Z223.1 and/or CAN/CSAB149
InstallationCodes.
THERMOSTATLOCATION
In an area having good air circulation, locate the thermostat
aboutfivefeethigh ona vibration-freeinsidewall. Do notinstall
thethermostat where it maybeinfluencedby any ofthefollow-
ing:
• Drafts,ordeadspotsbehinddoors,incorners,orunder
cabinets.
• Hot or cold air from registers.
• Radiantheatfromthesun.
• Lightfixturesorotherappliances.
• Radiantheat from a fireplace.
• Concealed hot or cold water pipes, or chimneys.
• Unconditioned areas behind the thermostat, such as
anoutside wall.
HOT
COLD
Thermostat Influences
Consulttheinstructionspackagedwiththethermostatformount-
inginstructionsand further precautions.
C OMBUSTION AND 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/cooling costs but have created a problem supplying
combustionand ventilation airforgas fired andotherfuel burn-
ingappliances. Appliancesthat pullairoutofthehouse(clothes
dryers,exhaustfans,fireplaces, etc.) increase the problem by
starvingappliancesforair.
House depressurization can cause back drafting or improper
combustionof gas-fired appliances, therebyexposingbuilding
occupantstogascombustion products that could include car-
bonmonoxide.
If this furnace is to be installed in the same space with other
gas appliances, such as a water heater, ensure there is an
adequatesupply of combustionandventilationair for the other
appliances. Referto the latesteditionofthe National FuelGas
Code NFPA 54/ANSI Z223.1 or CAN/CSA B149 Installation
Codes or applicable provisions of the local building codes for
determiningthecombustionairrequirementsfortheappliances.
This furnace must use indoor air for combustion. It cannot be
installed as a direct vent (i.e., sealed combustion) furnace.
Most homes will require outside air be supplied to the furnace
areaby meansofventilation grilles orductsconnecting directly
to the outdoors or spaces open to the outdoors such as attics
or crawl spaces.

13
E XTERIOR MASONRY C HIMNEYS - C ATEGORY I F URNACES O NLY
C ATEGORY I V ENTING (V ERTICAL V ENTING )
T O  PREVENT  POSSIBLE  PERSONAL  INJURY  OR  DEATH  DUE  TO 
ASPHYXIATION , THIS  FURNACE  MUST  BE C ATEGORY I VENTED .D O  NOT 
VENT  USING C ATEGORY III VENTING .
WARNING
Category I Venting is venting at a non-positive pressure. A
furnaceventedasCategoryIisconsidereda fan-assisted ap-
pliance and the vent system does not have to be “gas tight.”
NOTE: Single stage gas furnaces with induced draft blowers
drawproductsof combustion through a heat exchanger allow-
ing,insomeinstances, common venting with natural draft ap-
pliances(i.e. water heaters).All installationsmust be vented in
accordancewithNationalFuelGasCodeNFPA54/ANSIZ223.1
-latest edition. In Canada, the furnaces must bevented in ac-
cordance with the National Standard of Canada, CAN/CSA
B149.1andCAN/CSAB149.2-latesteditionsandamendments.
NOTE: Masonry vent kit (MVK-01 and MVK-02) is to only be
usedoninteriormasonrychimneys. Toensuresafeand reliable
operation, use only the kit listed for your model.
NOTE: The vertical height of the Category I venting system
mustbe at leastasgreatas the horizontal lengthofthe venting
system.
T O  PREVENT  POSSIBLE  PERSONAL  INJURY  OR  DEATH  DUE  TO 
ASPHYXIATION , COMMON  VENTING  WITH  OTHER  MANUFACTURER ’ S 
INDUCED  DRAFT  APPLIANCES  IS  NOT  ALLOWED .
WARNING
Theminimumventdiameter for the Category I venting system
is as shown:
UPFLOW COUNTERFLOW
45 4 Inch 4 Inch
70 4 Inch 4 Inch
90 4 Inch 4 Inch
115 5 Inch 5 Inch
140 5 Inch N/A
MODEL MINIMUM VENT
Undersomeconditions,larger vents than those shown above
may be required or allowed. When an existing furnace is re-
moved from a venting system serving other appliances, the
ventingsystem maybetoo largetoproperly venttheremaining
attachedappliances.
Upflow or Horizontal units areshipped withtheinduced draft
blower discharging from the top of the furnace. (“Top” is as
viewedforanupflowinstallation.) Theinduceddraftblower can
be rotated 90 degrees with the (0270F01119) chimney transi-
tion bottom kit for Category I venting. For horizontal installa-
tions, a four inch single wall pipe can be used to extend the
induced draft blower outlet 1/2” beyond the furnace cabinet.
THISPRODUCTISNOTDESIGNEDFOR COUNTERCLOCK-
WISEINDUCED DRAFT BLOWER ROTATION.
Vent the furnace in accordance with the National Fuel Gas
Code NFPA54/ANSI Z223.1 - latest edition. In Canada, vent
thefurnaceinaccordancewiththeNationalStandardofCanada,
CAN/CSAB149.1andCAN/CSAB149.2 -latesteditionsand
amendments.
Venting - Furnace Installed in Horizontal Position
THIS FURNACE IS NOT DESIGN CERTIFIED TO BE HORI-
ZONTALLYVENTEDTHROUGHANEXTERIORSIDE WALL.
Thefollowingdescribesanoptionalventingprocedurewhenthe
furnace is installed in the horizontal left discharge position.
To rotate the induced draft blower clockwise, you will need to
purchaseone(0270F01119)chimneytransitionbottomkit.
1. Disconnectelectricalpower from the furnace.
2. Disconnect the induced draft blower power leads, flue
pipe,andpressureswitch tubing.
3. Removetheroundcutoutfromtherightsideofthewrapper.
4. Removeandsavethefourscrewsthatfastentheinduced
draft blower to the flue collector box.
5. Removeandsavethethreescrewsthatholdthechimney
assemblytotheinduceddraftblower.
6. Removeandsavethefourscrewsthatfastenthechimney
top to the chimney bottom.
7. Removethechimneytransitionbottomfromthetransition
bottom kit.
8. Install the chimney top with the four screws retained
fromstep 6ontothenewchimney transitionbottomfrom
the transition bottom kit.
9. Remove the induced draft blower and install the new
chimneyassemblytoitusingthe three screws retained
from step 5.
10. Rotatethe induceddraft blower90 degreestothe right,
feedthefluepipethroughtheroundcutoutfromtheoutside
of the wrapper, and fit onto the chimney top assembly.
Secure the pipe to the chimney top from the front, top,
and bottom using (3) screws and rotating the induced
draft blower to properly orient the assembly. NOTE: If
the pipe section is less than 18”, then attach it directly
to the chimney top on 3 sides and feed it through the
roundcutoutfromthe inside of the wrapper.
11. Reattach the induced draft blower using the (4) screws
retainedfromstep3. Ensurethegasketlocatedbetween
the induced draft blower and collector box is rotated
accordingly.
12. Reconnecttheinduceddraftblowerpower leads.NOTE:
Ifthewires are not long enough, pull extra wire fromthe
wirebundlein the blower compartment.
13. Reconnect the remaining flue pipe, and the pressure
switch tubing. Ensure that all wires and the pressure
switch tubing is at least one inch from the flue pipe, or
anyotherhotsurface.
14. Restorepowerto furnace.

14
E XTERIOR MASONRY C HIMNEYS - C ATEGORY I F URNACES O NLY
NOTE: In a horizontal installation the air conditioning coil
must be adequately supported by proper brackets and
supports. Inadequatecoilsupportcanresultinfurnacecabinet
distortionandairleakage.
Counterflow units are shipped with the induced draft blower
dischargingfrom the top of the furnace. (“Top”as viewed for a
counterflowinstallation.)
Vent the furnace in accordance with the National Fuel Gas
CodeNFPA54/ANSI Z223.1-latestedition.In Canada,ventthe
furnace in accordance with the national standard of Canada,
CAN/CSA B149.1 and CAN/CSA B149.2- latest editions and
amendments.
N EVER  ALLOW  THE  PRODUCTS  OF  COMBUSTION , INCLUDING  CARBON 
MONOXIDE , TO  ENTER  THE  RETURN  DUCTWORK  OR  CIRCULATION  AIR 
SUPPLY .
WARNING
EXTERIORMASONRYCHIMNEYS (CATEGORYIFURNACESONLY)
Anexteriormasonrychimney is defined as a “Masonry” chim-
ney exposed to the outdoors on one or more sides below the
roof line.” The ability to use a clay lined masonry chimney
dependson aparameternot associatedwith interiorchimneys.
Thisvariableisthegeographiclocationof the installation. Re-
searchershavediscoveredthatthewinter designtemperatures
havea direct impact on the suitabilityofthistypeof venting. In
most situations, the existing masonry chimneys will require a
properly sized metallic liner.
P OSSIBILITY  OF  PROPERTY  DAMAGE , PERSONAL  INJURY  OR  DEATH 
DAMAGING  CONDENSATION  CAN  OCCUR  INSIDE  MASONRY  CHIMNEYS 
WHEN  A  SINGLE  FAN ‐ ASSISTED C ATEGORY I APPLIANCE (80%AFUE
FURNACE ) IS  VENTED  WITHOUT  ADEQUATE  DILUTION  AIR .D O  NOT 
CONNECT  AN 80% FURNACE  TO  A  MASONRY  CHIMNEY  UNLESS  THE 
FURNACE  IS  COMMON  VENTED  WITH  A  DRAFT  HOOD  EQUIPPED 
APPLIANCE  OR  THE  CHIMNEY  IS  LINED  WITH  A  METAL  LINER  OR T YPE B
METAL  VENT .A LL  INSTALLATIONS  USING  MASONRY  CHIMNEYS  MUST  BE 
SIZED  IN  ACCORDANCE  WITH  THE  APPROPRIATE  VENTING  TABLES .I F  AN 
80%
FURNACE  IS  COMMON  VENTED  WITH  A  DRAFT  HOOD  EQUIPPED 
APPLIANCE , THE  POTENTIAL  FOR  CONDENSATION  DAMAGE  MAY  STILL 
EXIST  WITH  EXTREMELY  COLD  CONDITIONS , LONG  VENT  CONNECTORS ,
EXTERIOR  CHIMNEYS , OR  ANY  COMBINATION  OF  THESE  CONDITIONS .
T
HE  RISK  OF  CONDENSATION  DAMAGE  IS  BEST  AVOIDED  BY  USING 
MASONRY  CHIMNEY  AS  A  PATHWAY  FOR  PROPERLY  SIZED  METAL  LINER 
OR T YPE B METAL  VENT .
WARNING
Wash
Clay Tile Size: 8" x 8" x12"
(Each x 24" Length)
1/2" to 1"Air Space
Second Floor
First Floor
Attic Floor
Roof Line
Throat
Damper
Breech
Clean Out Fan Assisted
Forced Air
Furnace
Natural Draft
Water Heater
Water Heater
Vent Connector
Basement Floor
F.A.F. Vent
Connector
Typical Multiple Flue Clay Tile Chimney
CHECKLIST SUMMARY
Thischecklist serves as asummaryof the items tobechecked
beforeventing an80+furnaceintoa masonrychimney.Inaddi-
tion,werecommendthataqualifiedservicemanusethischeck-
list to perform a yearly inspection of the furnace venting sys-
tem.
This checklist is only a summary. For detailed information on
each of the procedures mentioned, see the paragraph refer-
enced with each item.
This inspection is based upon a draft topical report, “Masonry
ChimneyInspectionandRelining”,issued bythe GasResearch
Institute. While not yet finalized, we believe this report repre-
sents the best information on this subject which is currently
available.

15
E XTERIOR MASONRY C HIMNEYS - C ATEGORY I F URNACES O NLY
Ifthechimneydoesnotmeettheseterminationrequirements,
but all other requirements in the checklist can be met, it may
be possible for a mason to extend the chimney. If this will not
be practical, see Fix 1.
Wall or
Parapet
2' Min.
2' Min. 3' Min.
Chimney
10' or Less
10' or Less
2' Min. 3' Min.
Chimney
Termination 10 Feet Or Less From Ridge, Wall or Parapet
More than 10’
Wall or
Parapet
NOTE: No Height
above parapet
required when distance
from walls or parapet is
more than 10 feet.
Chimney
3’Min.
More than 10’
10’
2” Min.
3’Min.
Chimney
Height above any
roof surface within
10 feet horizontally.
Ridge
Termination More Than 10 Feet From Ridge, Wall or Parapet
CHECK2-ANYSOLID ORLIQUID FUELAPPLIANCES VENTED
INTOTHISCHIMNEY CHANNEL
Solidfuel appliances include fireplaces, woodstoves,coalfur-
naces,andincinerators.
Proper Chimney
Termination?
(Check 1)
Chimney channel
free of solid and
liquid fuel
appliances?
(Check 2)
Change venting
arrangements
(Fix 2)
Crown in good
condition
(Check 3)
Rebuild crown
(Fix 3)
and/or Reline
(Fix 4)
Reline
(Fix 4)
Reline
(Fix 4)
Cleanout free of
debris?
(Check 4)
Liner in good
condition?
(Check 5)
Reline
(Fix 4)
Dilution air
available?
(Check 6)
Complete the
installation.
(Check 7)
CHECK1 -PROPERCHIMNEY TERMINATION.
A masonry chimney used as a vent for gas fired equipment
mustextend at leastthreefeet above thehighestpoint where it
passesthrough the roof. It mustextendatleast two feet higher
thanany portion of a building within ahorizontaldistanceof 10
feet. In addition, the chimney must terminate at least 3 feet
above any forced air inlet located within 10 feet. The chimney
mustextendatleastfivefeetabovethehighestconnectedequip-
mentdrafthood outlet or flue collar.

16
E XTERIOR MASONRY C HIMNEYS - C ATEGORY I F URNACES O NLY
Next, use a flashlight and small mirror to sight up the liner. B
vent must be supported so as to not come into direct contact
withthechimney walls or tile liner. If it is not, it can probably be
rehung so as to be acceptable.A thimble or fire stop may be
helpfulhere.
Flexiblelinersshouldbehungstraightornearlystraight.If it is
spiraled in the chimney and in good condition, it should be
rehung. To do this, break the top seal; pull up and cut off the
excess liner length, and refit the top seal. Use caution when
doing this, as the cut edges of flexible liners may be sharp.
The surfaces of the liner must be physically sound. If gaps or
holes are present, the metal liner must be removed and re-
placed (Fix 4). Finally, confirm that the metal liner is the cor-
rect size for the appliances to be installed. Use the GAMA
tablesand rules.
If a metal liner is not present, a clay tile liner must be present,
or the chimney must be lined (Fix 4).
Use a flashlight and small mirror at the cleanout or vent con-
nector to inspect the clay tile liner. If any of the following prob-
lemsarepresent:
• Tilesectionsmisaligned
• Tile sections missing
• Gaps between tile sections
• Signsofcondensatedrainageatthecleanoutor vent
connectors
• Mortarprotrudingfrom between tile sections
• Use of sewer pipe or drainage pipe rather than an
approved fire clay tile reline the chimney (Fix 4).
Next, measure the size of the liner. It may be possible to do
this from the cleanout. The liner must be at least as large as
the minimum size established by the tables in National Fuel
Gas Code NFPA 54/ANSI Z223.1 - latest edition and in the
NationalStandardofCanada,CAN/CSAB149.1andCAN/CSA
B149.2 - latest editions and amendments. If the liner is too
small or too large, then the chimney must be relined (Fix 4).
CHECK 6-DILUTION AIR.
If gas-fired appliances are to be vented into a clay tile liner, a
sourceofdilutionairis required.
Dilutionaircannot be obtained through:
• Induceddraft appliances
• Naturaldraft appliances withventdampers
Sufficientdilutionaircanordinarily beobtained throughthedraft
hood of a natural draft appliance only if the appliance’s vent
connectordoes notincludea ventdamper. If dilutionairwill not
be available, the chimney must be relined (Fix 4).
Liquidfuel appliances include oil furnaces,oil-firedboilersand
oil-firedwater heaters.
Applianceswhichburnpropane (sometimes referred to as LP
(liquefiedpetroleum)) gasare consideredgas-firedappliances.
CHECK3-CHIMNEYCROWN CONDITION.
Damagefromcondensateusuallyshowsupfirstin the crown.
Ifany ofthefollowing troublesignsare present,thecondition of
the crown is not satisfactory:
a) Crownleaning
b) Bricks missing
c) Mortarmissing
d) Tile liner cracked
e) No tile liner
f) Salt staining at mortar joints. (White stains, and mortar
becomessandy and/or erodes.)
For problems a, b, or c, see Fix 3. If problems d, e, or f are
present,see Fix 4. IMPORTANT:Itmaybe necessary to follow
both Fix 3 and Fix 4.
CHECK4-DEBRISIN CLEANOUT
Acleanout (dropleg)mustbepresent suchthatthe upper edge
ofthe cleanoutcoveris atleast12 inchesbelowthe loweredge
of the lowest chimney inlet opening.
A chimney without a cleanout could become partially blocked
by debris. If no cleanout is present, the chimney must be re-
lined (Fix 4). Remove the cleanout cover, and examine the
cleanoutfordebris.If significantamounts ofanyof thefollowing
arefound:
• Fueloilresidue
• Bricks
• Mortaror sand
• Pieces of the tile liner
• Rustedpieces ofthemetallic liner -relinethe chimney
(Fix 4).
CHECK5-LINERCONDITION.
If a metal liner is present, it must be checked. It cannot be
assumed that all existing metal liners are correctly installed
andingoodcondition.
Remove the lowest existing vent connector, and examine the
insideoftheelboworteeatthebaseofthe liner.Asmallamount
of soot may be considered acceptable, provided the installer
vacuums it away. If rusted pieces of the liner have collected
here,themetalliner must be removed and replaced (Fix 4).
Next, gently tap the inside of the liner with a Phillips screw-
driver. If the screwdriver perforates the liner, or if the tapping
does not sound like metal hitting metal, the liner must be re-
movedand replaced (Fix 4).
Rememberthatallappliancesmustbeventedinsidetheliner.
Venting one appliance inside the liner and another appliance
outside the liner is not acceptable.

17
E XTERIOR MASONRY C HIMNEYS - C ATEGORY I F URNACES O NLY
FIX3-REBUILDTHE CROWN
If the chimney crown is damaged, a qualified mason must re-
pairitin accordance with nationally recognized building codes
or standards. One such standard which may be referenced is
the Standard for Chimneys, Fireplaces, Vents, and Solid Fuel
BurningAppliances,ANSI/NFPA211.
FIX 4-RELINING
ReliningoptionsincludeBventandflexibleliners.
Ifthe chimney has diagonal offsets, Bventprobablycannot be
used.
If B vent is to be used, it must be supported adequately. Sup-
ports (such as fire stops or thimbles) must be used to prevent
the B vent from coming into direct contact with the tile liner or
chimneywalls.Direct contact would result in higher heat loss,
with an increased possibility of poor venting system perfor-
mance.
Itis not acceptable to ventoneapplianceinside the B vent and
other appliances outside. The excess space between the B
vent and the chimney walls must be covered at the top of the
chimneybyaweatherproof, corrosion resistant flashing.
The B vent should then be topped with a listed vent cap. The
listed vent cap will, when installed per the manufacturer’s in-
structions,prevent problems due to rain,birds,or wind effects.
AB-ventinstalledasdescribedinthissectionisconsideredto
be an enclosed vent system, and the sizing tables in National
Fuel Gas Code NFPA 54/ANSI Z223.1 - latest edition and in
theNational Standardof Canada,CAN/CSAB149.1and CAN/
CSA B149.2 - latest editions and amendments may be used.
If a flexible liner is to be used, it must be made of the proper
materials:
• For most residential applications, an aluminum liner
shouldbeacceptable.
• If the combustion air supplied to the furnace will be
contaminatedwithcompoundscontaining chlorine or
fluorine, a liner ofAL29-4C stainless steel should be
used. Common sources of chlorine and fluorine
compounds include indoor swimming pools and
chlorinebleaches,paintstrippers,adhesives,paints,
varnishes, sealers, waxes (which are not yet dried)
andsolventsusedduringconstructionandremodeling.
Variouscommercialand industrialprocesses mayalso
besources of chlorine/fluorine compounds.
• Heaviergauge300and400seriesstainlesssteelliners
weredevelopedforusewithoilorsolidfuelappliances.
Theyarenotsuitableforusewith gas-firedappliances.
Flexibleliners specifically intended andtestedforgas
applications are listed in the UL “Gas and Oil
EquipmentDirectory”. (ULStandard1777).
CHECK 7-COMPLETETHE INSTALLATION.
IfChecks 1through 6havebeen satisfactory,andthe linerisan
acceptable size as determined by the tables in National Fuel
Gas Code NFPA 54/ANSI Z223.1 - latest edition and in the
NationalStandardofCanada, CAN/CSAB149.1andCAN/CSA
B149.2 - latest editions and amendments, then the clay tile
liner can probably be used as a vent for the gas appliances.
However, the installer must keep in mind the following factors
which may render the tile liner unsuitable for use as a vent:
• Extremelycoldweather
• Longvent connectors
• Masonry chimneys with no air gap between the liner
and the bricks. (In practice, this can be difficult to
detect.)
• Exterior chimneys (The tables in National Fuel Gas
CodeNFPA54/ANSI Z223.1 -latesteditionand in the
National Standard of Canada, CAN/CSAB149.1 and
CAN/CSA B149.2 - latest editions and amendments
assumeinteriorchimneys.)
If, in the judgment of the local gas utility, installer, and/or local
codes; one or more of the above factors is likely to present a
problem, the chimney must be relined (Fix 4).
FIX1-LINER TERMINATION
Any cap or roof assembly used with a liner must be approved
by the liner manufacturer for such use. The liner and cap/roof
assembly must then terminate above the roof in accordance
withthemanufacturer’sinstructions.
In some cases, a shorter extension above the roof may be
possible with a liner than would be required with a masonry
chimney.
Forfurtherinformationonrelining,seeFix4.
FIX2-CHANGEVENTINGARRANGEMENTS
Ifthemasonrychimneyhas more than one channel, it may be
possibletoventthegasappliances into one channel and vent
thesolid or liquid fuel appliance(s) into another channel(s).Do
notvent an 80+Furnaceinside of ametalliner with otherappli-
ancesventedoutside the liner.
Alternatively,thehomeownermayagreetodiscontinue use of
the fireplace (solid fuel appliance). If so, the tile liner must be
cleanedtoremovecreosotebuildup.Thefireplaceopeningmust
thenbepermanently sealed.
If oil-fired appliance(s) are being replaced by gas-fired
appliance(s), the tile liner must first be cleaned to remove the
fueloilresidue.
Ifnoneof the above options is practical, the furnacemayneed
to be vented vertically with a B Vent.
Undersomeconditions,a90%+furnacecouldbeinstalledrather
than an 80% furnace. The 90%+ furnace can be vented hori-
zontallyorverticallythroughPVC pipe.

18
E LECTRICAL C ONNECTIONS
For sizing of flexible liners, see Note 22 and the tables in the
NationalFuelGas Code NFPA54/ANSI Z223.1 - latest edition
andin theNationalStandardofCanada, CAN/CSAB149.1and
CAN/CSAB149.2-latesteditions and amendments.
To install the liner, read and follow the liner manufacturer’s in-
structionsandyourlocalcodes.Excesslinerlengthshouldbe
pulledout of the chimney and cutoff. Use caution when doing
this, as the cut edges of flexible liners may be sharp. Do not
spiral excess liner inside of the chimney. Support the liner as
recommendedby the linermanufacturer.
Somemanufacturers offlexibleliners offeraninsulation sleeve
designed to be added to the liner before it is installed in the
chimney.(Pouredinsulation, either vermiculite orothermateri-
als,isnolongerrecommended.)Insulationwillneedtobeadded
to the flexible liner if:
• It is required by the liner manufacturer’s instructions.
• The previous liner was properly sized and installed,
andsuffered fromcondensationdamage.
• It is required by your local building codes.
Evenif none ofthosethree conditions existwhichrequire addi-
tional liner insulation, the installer may wish to consider it if:
• The local climate is very cold.
• The chimney is very tall.
• Theventconnectorsusedareverylongorhave alarge
numberof elbows.
• Localexperience indicatesthatflexible liners installed
without insulation are likely to have condensation
problems.
Insulation must be selected and installed in accordance with
thelinermanufacturer’sinstructions.
Finally,capthechimneyand terminate the liner in accordance
withthelinermanufacturer’sinstructions.
E LECTRICAL C ONNECTIONS
HIGHVOLTAGE!
T O  AVOID  THE  RISK  OF  ELECTRICAL  SHOCK , WIRING  TO 
THE  UNIT  MUST  BE  POLARIZED  AND  GROUNDED .
WARNING
HIGHVOLTAGE!
T O  AVOID  PERSONAL  INJURY  OR  DEATH  DUE  TO 
ELECTRICAL  SHOCK , DISCONNECT  ELECTRICAL  POWER 
BEFORE  SERVICING  OR  CHANGING  ANY  ELECTRICAL 
WIRING .
WARNING
L ABEL  ALL  WIRES  PRIOR  TO  DISCONNECTION  WHEN  SERVICING 
CONTROLS .W IRING  ERRORS  CAN  CAUSE  IMPROPER  AND  DANGEROUS 
OPERATION .V ERIFY  PROPER  OPERATION  AFTER  SERVICING .
CAUTION
HIGHVOLTAGE!
T O  AVOID  THE  RISK  OF  INJURY , ELECTRICAL  SHOCK  OR 
DEATH , THE  FURNACE  MUST  BE  ELECTRICALLY 
GROUNDED  IN  ACCORDANCE  WITH  LOCAL  CODES  OR  IN 
THEIR  ABSENCE , WITH  THE  LATEST  EDITION  OF  THE 
N
ATIONAL E LECTRIC C ODE .
WARNING
WIRINGHARNESS
The wiring harness is an integral part of this furnace. Field
alteration to comply with electrical codes should not be re-
quired. Wiresarecolor coded for identification purposes. Re-
fertothe wiring diagram for wire routings. If any of the original
wireassuppliedwiththe furnace must be replaced, it must be
replacedwithwiringmaterial having a temperature rating of at
least 105° C. Any replacement wiring must be a copper con-
ductor.
115VOLTLINECONNECTIONS
Beforeproceedingwith electrical connections, ensure that the
supplyvoltage,frequency,andphase correspondtothat speci-
fiedontheunitratingplate. Powersupplytothe furnace must
be NEC Class 1, and must comply with all applicable codes.
Thefurnacemustbeelectricallygroundedinaccordancewith
local codes or, in their absence, with the latest edition of The
National Electric Code, ANSI NFPA 70 and/or The Canadian
ElectricCodeCSAC22.1.
Usea separate fused branch electrical circuit containingprop-
erly sized wire, and fuse or circuit breaker. The fuse or circuit
breakermustbesizedinaccordancewith the maximum over-
currentprotectionspecified on the unit rating plate. An electri-
caldisconnect must be provided at the furnace location.
Line voltage wiring must enter into the junction box provided
withthefurnace.
NOTE: Line polarity must be observed when making field
connections.
FOSSILFUEL APPLICATIONS
Thisfurnacecanbe used in conjunction with a heat pump in a
fossilfuelapplication. Afossil fuel application refers to a com-
bined gas furnace and heat pump installation which uses an
outdoor temperature sensor to determine the most cost effi-
cientmeansofheating (heat pump, gas furnace, or both).

19
E LECTRICAL C ONNECTIONS
A heat pump thermostat with two stages of heat is required to
properlyusea furnace in conjunction with a heat pump. Refer
to the fossil fuel kit installation instructions for additional ther-
mostatrequirements.
Strictly follow the wiring guidelines in thefossilfuelkitinstalla-
tioninstructions. Allfurnace connections must be made to the
furnaceintegrated control moduleandtheFURNACE terminal
strip on the fossil fuel control board.
JUNCTIONBOXRELOCATION
E DGES  OF  SHEET  METAL  HOLES  MAY  BE  SHARP .U SE  GLOVES  AS  A 
PRECAUTION  WHEN  REMOVING  HOLE  PLUGS .
WARNING
Linevoltageconnections can be made through either the right
orleft side panel. The furnace is shippedconfiguredfora right
side electrical connection. To make electrical connections
throughthe opposite side of thefurnace,the junction box must
be relocated to the left side prior to making electrical connec-
tions. Torelocatethe junction box,performthe followingsteps.
T O  PREVENT  PERSONAL  INJURY  OR  DEATH  DUE  TO  ELECTRIC  SHOCK ,
DISCONNECT  ELECTRICAL  POWER  BEFORE  INSTALLING  OR  SERVICING  THIS 
UNIT .
WARNING
1. Removeboth doorsfromthefurnace.
2. Removeand savethescrews holdingthe junctionboxto
the right side of the furnace.
3. Modelsthathave the junction box located in the burner
compartmentwill need to move thejunctionboxdirectly
over.
4. Attach the junction box to the left side of the furnace,
using the screws removed in step 2.
5. Check the location of the wiring. Confirm that it will not
bedamagedbyheatfromthe burners or by the rotation
of the fan. Also confirm that wiring location will not
interferewith filter removalorothermaintenance.
Afterthe junction box is inthedesiredlocation, use washers to
connectfield-suppliedconduittothejunctionboxinaccordance
with NEC and local codes. Connect hot, neutral, and ground
wires as shown in the furnace wiring diagram. The wires and
groundscrewarelocatedin the furnace junction box.
NOTE: In downflow applications the power leads should be
routed through the supplied wire tabs when rotating junction
box to the left side.
Low voltage wires may be connected to the terminal strip.
IMPORTANTNOTE: Toavoidpossibleequipmentmalfunction,
route the low voltage wires to avoid interference with filter re-
movalor other maintenance.
HIGHVOLTAGE!
T O  AVOID  THE  RISK  OF  INJURY , ELECTRICAL  SHOCK  OR 
DEATH , THE  FURNACE  MUST  BE  ELECTRICALLY 
GROUNDED  IN  ACCORDANCE  WITH  LOCAL  CODES  OR  IN 
THEIR  ABSENCE , WITH  THE  LATEST  EDITION  OF  THE 
N
ATIONAL E LECTRIC C ODE .
WARNING
To ensure proper unit grounding, the ground wire should run
fromthe furnace groundscrewlocated inside thefurnacejunc-
tion box all the way back to the electrical panel. NOTE: Do
not use gas piping as an electrical ground. To confirm proper
unit grounding, turn off the electrical power and perform the
followingcheck.
1. Measure resistance between the neutral (white)
connectionandone of the burners.
2. Resistance should measure 10 ohms or less.
This furnace is equipped with a blower door interlock switch
whichinterruptsunitvoltagewhen theblower doorisopenedfor
servicing. Do not defeat this switch.
24VOLTTHERMOSTATWIRING
NOTE: Wire routing must not interfere with circulator blower
operation,filter removal, orroutinemaintenance.
Lowvoltageconnectionscan be made through either the right
orleft sidepanel.Thermostat wiringentrance holesarelocated
in the blower compartment. The following figure shows con-
nections for a “heat only” system and “heat/cool system”.
Furnace
Control Furnace
Control
Remote
Condensing
Unit
Heatin
g
Room
Thermostat
Heating/Cooling
Room Thermostat
WW
Typical Field Wiring (24 VAC Control Circuit)
This furnace is equipped with a 40 VAtransformer to facilitate
usewith most cooling equipment. Consult the wiring diagram,
located on the blower compartment door, for further details of
115 Volt and 24 Volt wiring.
A single-stage thermostat with only one heating stage can be
used to control this furnace.
GME8FURNACEWITH2-STAGECONDENSERFIELDWIRING
The GME8 model furnaces may be used with a 2-stage
outdoor air conditioner. Atwo stage cooling/single stage gas
heat thermostat is required, in addition to a field supplied
relay. The relay must have a 24VAC coil and contacts rated
for up to 1 horse power at 125VAC.

20
G AS S UPPLY AND P IPING
1. Install the field supplied relay on the control mount-
ing panel near the furnace ignition control. The relay
should be installed such that the motor leads will
reach the relay contact terminals.
2. Connect the “Y2” (high stage cool) thermostat
terminal to one coil terminal of the field supplied
relay. Connect the other field supplied relay coil
terminal to the “C” terminal on the furnace ignition
control. Typical 18AWG thermostat wire may be
used.
3. Connectthe common terminal of the field supplied
relayto the “LINE-H” terminal on the furnace ignition
control. Usewiring having copper conductors only
and a temperature rating of at least 105°C.
4. Using the GME8 airflow tables in this manual,
determinethemotor speed tap needed to deliver the
requiredhigh stagecoolingairflow. Connect the
selected motor speed tap to the normally open
terminal on the field supplied relay. Use wiring
havingcopperconductorsonlyandatemperature
rating of at least 105°C.
5. See the wiring schematic below.
Furnace
Control
Remote Condensing Unit
Heating/Cooling
Room Thermostat
Y
Y1
Y1 Y2
Lo-Heat
Hi-Heat
Cool
Line-H
T4 T2
T3 T5
ECO-TECH
MOTOR
Field
Supplied
Relay
Y2
Field Wiring for GME8 Furnace with 2-Stage Condenser
SETTINGTHEHEAT ANTICIPATOR
The following method should be used in measuring the amp
draw of the control circuit to assure proper adjustment of the
thermostatheatanticipator
• Wrap the “R” leg around a clip-on ammeter 10 times.
• Energizethefurnacein the heat mode.
• Recordthe reading.
• Dividethisreadingby 10.
• Set the heat anticipator on the thermostat to match
thisreading.
Example: If the reading on the ammeter is “4”, divide this by
10. The anticipator setting will be .4 amps.
115VOLTLINECONNECTIONOFACCESSORIES
(ELECTRONICAIR CLEANER)
HIGHVOLTAGE!
T O  AVOID  PERSONAL  INJURY  OR  DEATH  DUE  TO 
ELECTRICAL  SHOCK , DISCONNECT  ELECTRICAL  POWER 
BEFORE  SERVICING  OR  CHANGING  ANY  ELECTRICAL 
WIRING .
WARNING
The furnace integrated control module is equipped with line
voltageaccessoryterminalsfor controllingpowerto anoptional
field-suppliedelectronic air cleaner.
The accessory load specifications are as follows:
Electronic Air Cleaner 1.0 Amp maximum at 120 VAC
TurnOFFpowerto the furnace before installing any accesso-
ries. Follow the air cleaner manufacturers’ instructions for lo-
cating, mounting, grounding, and controlling these accesso-
ries. Accessory wiring connections are to be made through
the1/4" quick connect terminals providedon the furnace inte-
gratedcontrolmodule. Theelectronicaircleanerhot terminal
is identified as EAC-H and the neutral terminal is identified as
NEUTRAL. All field wiring must conform to applicable codes.
Connectionsshould bemadeas showninthe followingillustra-
tion.
EAC-H Line Transformer Line Transformer EAC
Air Cleaner
Control Module
Hot 120 VAC Neutral 120 VAC
Optional
Accessories
If it is necessary for the installer to supply additional line volt-
agewiring to theinsideofthe furnace, thewiringmustconform
to all local codes, and have a minimum temperature rating of
105°C. All line voltage wire splices must be made inside the
furnacejunction box.
Theintegratedcontrolmoduleelectronicaircleanerterminals
(EAC)areenergizedwith115voltswheneverthecirculatorblower
isenergized.