Amana M8 User manual

5151 San Felipe Suite 500 • Houston, TX 77056
www.goodmanmfg.com•www.amana-hac.com
©2011 - 2015 Goodman Manufacturing Company, L.P.
ATTENTION INSTALLING PERSONNEL
As a professional installer, you have an obligation to know the
product better than the customer. This includes all safety pre-
cautions and related items.
Prior to actual installation, thoroughly familiarize yourself with
thisInstructionManual.Payspecialattentiontoallsafetywarn-
ings. 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.
Safetyisamatterofcommonsense...amatterofthinkingbefore
acting. Most dealers have a list of specific, good safety
practices...follow them.
The precautions listed in this Installation Manual are intended
as supplemental to existing practices. However, if there is a
direct conflict between existing practices and the content of
this manual, the precautions listed here take precedence.
RECOGNIZE THIS SYMBOL
AS A SAFETY PRECAUTION
NOTE: Please contact your distributor or our website listed
below for the applicable Specification Sheet referred to in this
manual.
Installer: Affixallmanuals
adjacenttotheunit.
These furnaces comply with requirements embodied in
the American National Standard / National Standard of
Canada ANSI Z21.47·CSA-2.3 Gas Fired Central Furnaces.
IO-446C
11/2015
INSTALLATION INSTRUCTIONS FOR
*M(H,S)8 / GD(H,S)8 / GHS8 / GME8
ADS(H,S)8 / AMEH8 GAS FURNACE
(CATEGORYI)
is a registered trademark of Maytag Corporation or its related companies and is used under license. All rights reserved.
TABLEOFCONTENTS
Safety Considerations......................................................3
Additional Safety Considerations ....................................4
Shipping Inspection ..........................................................4
Electrostatic Discharge (ESD) Precautions.......................5
To The Installer..................................................................5
PRODUCTAPPLICATION............................................................5
LOCATIONREQUIREMENTSANDCONSIDERATIONS ..................6
Clearances and Accessibility ...........................................7
Installation Positions.......................................................7
Horizontal Installation .....................................................7
Furnace Suspension..........................................................8
Existing Furnace Removal.................................................8
ThermostatLocation .........................................................8
COMBUSTIONANDVENTILATIONAIRREQUIREMENTS.............8
CATEGORYIVENTING(VERTICALVENTING) ..............................9
EXTERIORMASONRYCHIMNEYS
(CATEGORYIFURNACESONLY) .........................................10
Checklist Summary..........................................................10
Check 1 - Proper chimney termination ..........................11
Check 2 - Any solid or liquid fuel appliances
vented into this chimney channel ..............................11
Check 3 - Chimney Crown Condition...............................12
Check 4 - Debris in Cleanout...........................................12
Check 5 - Liner Condition. ...............................................12
Check 6 - Dilution Air. .....................................................12
Check 7 - Complete the Installation................................12
Fix 1 - Liner Termination .................................................13
Fix2 -ChangeVentingArrangements ..............................13
Fix 3 - Rebuild the Crown ................................................13
Fix 4 - Relining ................................................................13
ELECTRICALCONNECTIONS.....................................................14
Wiring Harness...............................................................14
115 Volt Line Connections ..............................................14
Fossil Fuel Applications .................................................14
Junction Box Relocation .................................................14
24 Volt Thermostat Wiring .............................................15
GME8&AMEH8Furnaces
with 2-Stage Condenser Field Wiring ........................15
SettingtheHeatAnticipator............................................16
115 Volt Line Connection of Accessories........................16
Electronic Air Cleaner .....................................................16
24 Vac Humidifier ...........................................................16
GASSUPPLYANDPIPING ........................................................16
HighAltitudeDerate........................................................17
Propane Gas Conversion ................................................17
Gas Piping Connections..................................................17
Upflow Installations.......................................................18
Counterflow Installations ..............................................18
Gas Piping Checks...........................................................18
Propane Gas Tanks and Piping .......................................19

2
CIRCULATINGAIRANDFILTERS ...............................................20
Ductwork - Air Flow.........................................................20
Filters - Read This Section Before
Installing The Return Air Ductwork ................................20
Upright Installations ......................................................20
Circulation Air Filters .....................................................20
Horizontal Installations .................................................21
SEQUENCEOFOPERATION
(INTEGRATEDIGNITIONCONTROL).....................................21
PowerUp .........................................................................21
HeatingMode ..................................................................22
(Mode DIP switch is set to “1 STG” position) .................22
(Mode DIP Switch is set to “2 STG” position) .................22
Cooling Mode ..................................................................22
Fan Only Mode................................................................22
START-UPPROCEDUREANDADJUSTMENT ..............................23
Furnace Operation..........................................................23
Furnace Start-up .............................................................23
FurnaceShutdown ..........................................................23
Gas Supply Pressure Measurement................................23
Gas Manifold Pressure Measurement and Adjustment.25
Gas Input Rate Measurement (Natural Gas Only)..........27
TemperatureRise.............................................................27
Circulator Blower Speed Adjustment..............................27
Circulator Blower Fan Timing Adjustment .....................28
SettingFurnaceOperating Mode
(GDH8,GME8, *MH8,AMEH8&ADSH8modelsonly) 28
OPERATIONALCHECKS............................................................28
Checking Duct Static .......................................................28
BurnerFlame ...................................................................29
SAFETYCIRCUITDESCRIPTION................................................29
General............................................................................29
IntegratedControl Module .............................................29
Primary Limit...................................................................29
Auxiliary Limit.................................................................29
Rollout Limits ..................................................................29
Pressure Switches ...........................................................29
Flame Sensor...................................................................30
TROUBLESHOOTING ...............................................................30
Electrostatic Discharge (ESD) Precautions.....................30
Diagnostic Chart .............................................................30
Fault Recall .....................................................................30
(Furnaces equipped with
PCBBF132 Control Board only) ...................................30
ResettingFromLockout ...................................................30
MAINTENANCE........................................................................30
Annual inspection...........................................................30
Filters ..............................................................................31
Filter Maintenance..........................................................31
Filter Removal .................................................................31
Induced Draft and Circulator Blower Motors ................31
Flame Sensor (Qualified Servicer Only) .........................31
Igniter (Qualified Servicer Only) ....................................31
Burners............................................................................31
CLEANING(QUALIFIEDSERVICERONLY)..................................31
BEFORELEAVINGANINSTALLATION ........................................32
REPAIRANDREPLACEMENTPARTS..........................................32
ComponentID..................................................................33
APPENDIXDTROUBLESHOOTINGCHART ...............................34
PCBBF134&PCBBF132CONTROLBOARDS .................34
BLOWERPERFORMANCEDATA ...............................................37
*M(H/S)8 .........................................................................37
GDS8/ADSS8 ....................................................................38
GHS8 ................................................................................38
GDH8/ADSH8 .................................................................39
GME8 ...............................................................................40
AMEH8.............................................................................41
*(M, D, H)S8 / ADSS8 Wiring Diagram ..................................42
GME8 / AMEH8 Wiring Diagram...........................................43
Honeywell Gas Valve.......................................................43
*(M,D)H8 / ADSH8 Wiring Diagram ......................................44
Honeywell Gas Valve.......................................................44

3
G OODMAN
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 .
WILL NOT BE RESPONSIBLE FOR ANY INJURY OR PROPERTY
WARNING
S AFETY C ONSIDERATIONS
Adhere to the following warnings and cautions when installing,
adjusting,altering,servicing, or operatingthe furnace. To ensure
proper installation and operation, thoroughly read this manual
for specifics pertaining to the installation and application of this
product.
This furnace is manufactured for use with natural gas. It may be
fieldconvertedtooperateonL.P.gasbyusing the appropriate L.P.
conversionkitlistedinthePROPANEGAS/HIGHALTITUDEINSTAL-
LATIONS section of this manual
Install this furnace only in a location and position as specified in
LOCATIONREQUIREMENTS&CONSIDERATIONSsectionandINSTAL-
LATION POSITIONS section of thismanual.
Provide adequate combustion and ventilation air to the furnace
asspecifiedinCOMBUSTION&VENTILATIONAIRREQUIREMENTS
sectionofthismanual.
Combustion products must be discharged to the outdoors. Con-
nect this furnace to an approved vent system only, as specified in
CATEGORY 1 VENTING section of this manual.
Never test for gas leaks with an open flame. Use a commercially
available soap solution made specifically for the detection of
leaks to check all connections, as specified in GAS SUPPLY AND
PIPING section of this manual.
Always install a furnace to operate within the furnace’s intended
temperature-rise range with a duct system which has external
static pressure within the allowable range, as specified on the
furnace rating plate and OPERATIONAL CHECKSsection of these
instructions.
When a furnace is installed so that supply ducts carry air circu-
lated by the furnace to areas outside the space containing the
furnace, the return air shall also be handled by duct(s) sealed to
the furnace casing and terminating outside the space containing
thefurnace.
A gas-fired furnace for installation in a residential garage must
be installed as specified in the LOCATION REQUIREMENTS AND
CONSIDERATIONS section ofthismanual.
This furnace may be used as a construction site heater only if
certainconditionsaremet.TheseconditionsarelistedinthePROD-
UCT APPLICATION section of this manual.
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

4
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
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
• This furnace is approved for Category I Venting only.
• Provisions must be made for venting combustion
productsoutdoorsthroughaproperventingsystem.The
length of flue pipe could be a limiting factor in locating
thefurnace.
B10259-216
CO can cause serious illness including permanent brain
damageor death.
Advertencia especial para la instalación de calentadores ó manejadoras
de aire en áreas cerradas como estacionamientos ó cuartos de servicio.
B10259-216
El monóxido de carbono puede causar enfermedades severas
como daño cerebral permanente ó muerte.
Las emisiones de monóxido de carbono pueden circular a través
del aparato cuando se opera en cualquier modo.
B10259-216
RISQUE D'EMPOISONNEMENT AU MONOXYDE DECARBONE
Le monoxyde de
des carbone peutcauserdes maladies gravestellesque dommages permanents au cerveau et meme la mort.
Cette ventilation est nécessaire pour éviterle danger d'intoxication
au CO pouvant survenir si un appareilproduisant du monoxyde
de carbone continue de fonctionner au sein de la zone confinée.
SHIPPINGINSPECTION
All units are securely packed in shipping containers tested ac-
cording to International Safe Transit Association specifications.
The carton must be checked upon arrival for external damage. If
damage is found, a request for inspection by carrier’s agent must
be made in writing immediately.
The furnace must be carefully inspected on arrival for damage
and bolts or screws which may have come loose in transit. In the
eventofdamage the consigneeshould:
1. Make a notation on delivery receipt of any visible damage
to shipment or container.
2. Notify carrier promptly and request an inspection.
3. With concealed damage, carrier must be notified as soon
as possible - preferably within five days.
4. Filetheclaimwiththefollowingsupportdocumentswithin
a nine month statute of limitations.
• Original or certified copy of the Bill of Lading, or
indemnitybond.
• Original paid freight bill or indemnity in lieu thereof.
• Original or certified copy of the invoice, showing trade
and other discounts or reductions.
• Copy of the inspection report issued by carrier’s
representative at the time damage is reported tocarrier.
The carrier is responsible for making prompt inspection of dam-
age and for a thorough investigation of each claim. The distribu-
tor or manufacturer will not accept claims from dealers for trans-
portation damage.
Keepthisliteratureinasafeplaceforfuturereference.

5
ELECTROSTATIC DISCHARGE(ESD)PRECAUTIONS
NOTE: Dischargebody’s staticelectricitybeforetouchingunit. An
electrostaticdischargecanadverselyaffectelectricalcomponents.
Use the following precautions during furnace installation and ser-
vicing to protect the integrated control module from damage. By
putting the furnace, the control, and the person at the same elec-
trostatic potential, these steps will help avoid exposing the inte-
grated control module to electrostatic discharge. This procedure
is applicable to both installed and non-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
hand during grounding will be discharged.
3. Service integrated control module or connecting wiring
following the discharge process in step 2. Use caution not
to recharge your body with static electricity; (i.e., do not
moveorshuffleyourfeet,donottouchungroundedobjects,
etc.). If you come in contact with an ungrounded object,
repeat step 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
controlstotheircontainersbeforetouchinganyungrounded
object.
TOTHE INSTALLER
Before installing this unit, please read this manual thoroughly to
familiarize yourself with specific items which must be adhered to,
including but not limited to: unit maximum external static pres-
sure, gas pressures, BTU input rating, proper electrical connec-
tions,circulatingairtemperaturerise,minimumormaximumCFM,
and motor speed connections, and venting. These furnaces are
designed for Category I 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
P RODUCT A PPLICATION
This furnace is primarily designed for residential home-heating
applications. It is NOT designed or certified for use in mobile
homes, trailers or recreational vehicles. Neither is it designed or
certified for outdoor applications. The furnace must be installed
indoors (i.e., attic space, crawl space, or garage area provided the
garage area is enclosed with an operating door).
This furnace can be used in the following non-industrial commer-
cial applications:
Schools,Officebuildings,Churches,Retailstores,
Nursinghomes,Hotels/motels,Commonorofficeareas
In such applications , the furnace must be installed with the fol-
lowing stipulations:
• It must be installed per the installation instructions
provided and per local and national codes.
• It must be installed indoors in a building constructed on
site.
• Itmust bepart of a ducted system and notused ina free
air delivery application.
• It must not be used as a “make-up” air unit.
• All other warranty exclusions and restrictions apply.
Thisfurnace maybe used as a constructionsiteheaterONLY if the
following conditions are met:
• The vent system is permanently installed per these
installation instructions.
• A room thermostat is used to control the furnace. Fixed
jumpersthatprovidecontinuousheatingCANNOTbeused
and can cause long term equipment damage. Bi-metal
thermostats,oranythermostataffectedbyvibrationmust
not be used during construction.
• Return air ducts are provided and sealed to the furnace.
• Areturnairtemperaturerangebetween60ºF(16ºC)and
80ºF (27ºC) is maintained.
• Air filters are installed in the system and replaced daily
during construction and upon completion of
construction.
• Theinputrateandtemperaturerisearesetperthefurnace
rating plate.
• 100% outside air must be used for combustion during
construction. Temporary ducting may be used to supply
outsideairtothefurnaceforcombustion–donotconnect
this duct directly to the furnace. Size this duct according
to NFPA 54/ANSI Z223.1 section for Combustion and
Ventilation Air.
•The furnace heat exchanger, components, duct system,
air filters and evaporator coils are thoroughly cleaned
following final construction clean up by a qualified
person.
• All furnace operating conditions (including ignition,
input rate, temperature rise and venting) are verified by
a qualified person according to these installation
instructions.
• Furnace doors must be in place on the furnace while the
furnace is operating in any mode.
Damage or repairs due to failure to comply with these require-
mentsarenotcoveredunder the warranty.
NOTE: The Commonwealth of Massachusetts requires that the
following additional requirements must also be met:
• Gas furnaces must be installed by a licensed plumber or
gas fitter.
• A T-handle gas cock must be used.
• Iftheunit is tobeinstalled inanattic, the passagewayto
and the service area around the unit must have flooring.

6
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 lo-
cation. Refer also to the guidelines provided in Combustion and
VentilationAirRequirements.
• Centrallylocatethefurnacewithrespecttotheproposed
or existing air distribution system.
• Ensure the temperature of the return air entering the
furnace is between 55°F and 100°F when the furnace 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. Consult your local distributor for more details.
• Provisions must be made for venting combustion
productsoutdoorsthroughaproperventingsystem.The
length of flue pipe could be a limiting factor in locating
thefurnace.
• Ensure adequate combustion air is available for the
furnace. Improper or insufficient combustion air can
expose building occupants to gas combustion products
thatcouldincludecarbonmonoxide.RefertoCombustion
andVentilationAirRequirements.
• Thefurnace must be level. If the furnace is tobe seton a
floorthatmaybecomewetordampattimes,thefurnace
should be supported above the floor on a concrete base
sized approximately 1-1/2" larger than the base of the
furnace.
• Ensure upflow or horizontal furnaces are not installed
directlyoncarpeting,oranyother combustible material.
The only combustible material allowed is wood.
• Exposure to contaminated combustion air will result in
safetyandperformance-relatedproblems. Donotinstall
the furnace where the combustion air is exposed to the
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
• If the furnace is used in connection with a cooling unit,
install the furnace upstream or in parallel with the
cooling unit coil. Premature heat exchanger failure will
result if the cooling unit coil is placed ahead of the
furnace.
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
Toensureproperfurnaceoperation,install,operateandmaintain
the furnace in accordance with these installation and operation
instructions, all local building codes and ordinances. In their ab-
sence,followthelatesteditionoftheNationalFuelGasCode(NFPA
54/ANSI Z223.1), and/or CAN/CSA B149 Installation Codes, local
plumbing or waste water codes, and other applicable codes.
AcopyoftheNationalFuelGasCode(NFPA54/ANSIZ223.1)canbe
obtained from any of the following:
AmericanNationalStandardsInstitute
25 West 43rd Street, 4th Floor
NewYork,NY10036
NationalFireProtectionAssociation
1 Batterymarch Park
Quincy, MA 02169-7471
CSAInternational
8501 East Pleasant Valley
Cleveland, OH 44131
The rated heating capacity of the furnace should be greater than
or equal to the total heat loss of the area to be heated. The total
heat loss should be calculated by an approved method or in ac-
cordance with “ASHRAE Guide” or “Manual J-Load Calculations”
published by the Air Conditioning Contractors of America.
In the USA, this furnace MUST be installed in accordance with the
latest edition of the ANSI Z223.1 booklet entitled “National Fuel
Gas Code” (NFPA 54), and the requirements or codes of the local
utility or other authority having jurisdiction. Additional helpful
publications available from the NFPA are, NFPA 90A - Installation
of Air Conditioning and Ventilating System and NFPA 90B - Warm
Air Heating and Air Conditioning System.
All venting shall be in accordance with the National Fuel Gas
Code, ANSI Z223.1, or applicable local building and/or air condi-
tioning codes.
NOTE: Furnaces with NOx screens meet the California NOx emis-
sion standards and California seasonal efficiency standards. AN-
NUAL inspections of the furnace and its vent system is strongly
recommended.
L OCATION R EQUI REMENTS AND CONSIDERATIONS
Your unit model type determines which installation procedures
mustbeused.For*MH8,*MS8,andGHS8models,youmustfollow
instructions for Horizontal Left, Horizontal Right or Upflow instal-
lations only. These furnaces are not approved for Downflow in-
stallations.
DownflowmodelsGD(H,S)ARENOTAPPROVEDFORHORIZONTAL
OR UPFLOW INSTALLATIONS. For these models, use only the in-
structions for downflow installation only.

7
For vertical (upflow or downflow) applications, the
minimumcoolingcoilwidthshallnotbelessthanfurnace
width minus 1”. Additionally, a coil installed above an
upflow furnace or under a counterflow furnace may be
the same width as the furnace or may be one size larger
than the furnace. Example: a “C” width coil may be
installed with a “B” width furnace.
Forupflow applications,the front of the coil and furnace
must face the same direction.
• Ifthe furnace is installed in a residential garage, position
the furnace so that the burners and ignition source are
locatednotlessthan18inches(457mm)abovethefloor.
Protect the furnace from physical damage by vehicles.
• If the furnace is installed horizontally, the furnace access
doorsmustbeverticalsothattheburnersfirehorizontally
into the heat exchanger. Do not install the unit with the
access doors on the “up/top” or “down/bottom” side of
thefurnace.
• Donotconnectthisfurnacetoachimneyfluethatserves
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.
•Counterflow installation over a noncombustible floor.
Before setting the furnace over the plenum opening,
ensure the surface around the opening is smooth and
level. A tight seal should be made between the furnace
base and floor by using a silicon rubber caulking
compoundorcementgrout.
• Counterflow installation over a combustible floor. If
installationoveracombustible floor becomes necessary,
use an accessory subbase (see Specification Sheet
applicableto your modelfor details).A specialaccessory
subbase must be used for upright counterflow unit
installations over any combustible material including
wood.Followtheinstructionswiththesubbaseforproper
installations. Do not install the furnace directly on
carpeting, tile, or other combustible material other than
wood flooring. (NOTE: The subbase will not be required
if an air conditioning coil is installed between the supply
air opening on the furnace and the 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.
• Adequate combustion/ventilation air must be supplied
tothecloset.
• Furnace must be completely sealed to floor or base.
Combustion/ventilationairsupplypipesmustterminate
12" from top of closet and 12" from floor of closet. DO
NOT remove solid base plate for side return.
• Returnairductsmustbecompletelysealedtothefurnace
and terminate outside the enclosure surfaces.
CLEARANCES AND ACCESSIBILITY
Unobstructedfrontclearanceof24"forservicingisrecommended.
TOP
B1-VENT SINGLE (PLENUM)
1" 6" 1" 3" 0" 1"
VENT SIDES FRONT BACK
Top clearance for horizontal configuration - 1"
INSTALLATIONPOSITIONS
An upflow furnace may be installed in an upright position or hori-
zontal on either the left or right side panel. Do not install this
furnace on its back. For vertically installed upflow furnaces, re-
turn air ductwork may be attached to the side panel(s) and/or
basepan. For horizontally installed upflow furnaces, return air
ductwork must be attached to the basepan. For counterflow fur-
naces, return ductwork must be attached to the top end of the
blowercompartment.
NOTE:Ductworkmustneverbeattachedtothebackofthefurnace.
HORIZONTALINSTALLATION
For
horizontal installations,
insert the
#8 x 5/8 screw
from the
literature package.
Linecontacttoframingispermittedwhen installedinthehorizon-
tal configuration. Line contact is defined as the portion of the
cabinet that is formed by the intersection of the top and side.
ACCESSIBILITYCLEARANCE,WHEREGREATER,SHOULDTAKEPRECE-
DENCEOVERMINIMUMFIREPROTECTIONCLEARANCE. Agas-fired
furnace for installation in a residential garage must be installed

8
e. Test for draft hood equipped appliance spillage at the
drafthoodreliefopeningafter5minutesof main burner
operation. Use the flame of a match or candle;
f. After it has been determined that each appliance
connected to the venting system properly vents when
testedasoutlinedabove,returndoors,windows,exhaust
fans, fireplace dampers and any other gas burning
appliance to their previous conditions of use;
g. If improper venting is observed during any of the above
tests,thecommonventingsystemmustbecorrected.
Corrections must be in accordance with the latest edition of the
NationalFuelGasCodeNFPA54/ANSIZ223.1and/orCAN/CSAB149
Installation Codes.
Ifresizingisrequiredonanyportionoftheventingsystem,usethe
appropriate table in the latest edition of the National Fuel Gas
Code ANSI Z223.1 and/or CAN/CSA B149 Installation Codes.
THERMOSTATLOCATION
Inanareahavinggoodaircirculation,locatethethermostat about
five feet high on a vibration-free inside wall. Do not install the
thermostat where it may be influenced by any of the following:
• Drafts, or dead spots behind doors, in corners, or under
cabinets.
• Hot or cold air from registers.
• Radiant heat from the sun.
• Light fixtures or other appliances.
• Radiant heat from a fireplace.
• Concealed hot or cold water pipes, or chimneys.
• Unconditioned areas behind the thermostat, such as an
outside wall.
Consulttheinstructionspackagedwiththethermostatformount-
ing instructions and 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
Improvedconstruction and additional insulation in buildings have
reduced heat loss by reducing air infiltration and escape around
doorsandwindows. Thesechangeshavehelpedinreducingheat-
ing/cooling costs but have created a problem supplying combus-
tion and ventilation air for gas fired and other fuel burning appli-
ances. Appliances that pull air out of the house (clothes dryers,
exhaust fans, fireplaces, etc.) increase the problem by starving
appliances for air.
Housedepressurizationcancausebackdraftingorimpropercom-
bustion of gas-fired appliances, thereby exposing building occu-
pantstogascombustionproductsthatcouldincludecarbonmon-
oxide.
so that the ignition source and burners are located not less than
eighteeninches(18")abovethefloorandisprotectedorlocatedto
prevent physical damage by vehicles. A gas furnace must not be
installed directly on carpeting, tile, or other combustible materi-
als other than wood flooring.
FURNACESUSPENSION
If suspending the furnace from rafters or joist, use 3/8" threaded
rod and 2”x2”x3/8” angle iron as shown below. The length of rod
will depend on the application and the clearances necessary.
Suspended Furnace
EXISTING FURNACE REMOVAL
NOTE:Whenanexistingfurnaceisremovedfromaventingsystem
serving other appliances, the venting system may be too large to
properly vent the remaining attached appliances.
ThefollowingventtestingprocedureisreproducedfromtheAmeri-
canNationalStandard/NationalStandardofCanadaforGas-Fired
Central Furnaces ANSI Z21.47-Latest Edition, CSA-2.3-Latest Edi-
tion Section 1.23.1. The following steps shall be followed with
each appliance connected to the venting system placed in opera-
tion, while any other appliances connected to the venting system
are not in operation:
a. Seal any unused openings in the venting system;
b. Inspecttheventingsystem for proper sizeandhorizontal
pitch, as required by the National Fuel Gas Code, ANSI
Z223.1ortheCAN/CSAB149InstallationCodesandthese
instructions. Determine that there is no blockage or
restriction, leakage, corrosion and other deficiencies
which could cause an unsafe condition;
c. In so far as practical, close all building doors and
windows and all doors between the space in which the
appliance(s)connectedtotheventingsystemarelocated
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 as range hoods and
bathroom exhausts, so they shall operate at maximum
speed. Do not operate a summer exhaust fan. Close
fireplace dampers;
d. Followthelightinginstructions.Placetheappliancebeing
inspected in operation. Adjust thermostat so appliance
shall operate continuously;

9
If this furnace is to be installed in the same space with other gas
appliances, such as a water heater, ensure there is an adequate
supply of combustion and ventilation air for all appliances. Refer
to the latest edition of the National Fuel Gas Code NFPA 54/ANSI
Z223.1 or CAN/CSA B149 Installation Codes or applicable provi-
sions of the local building codes for determining the combustion
air requirements for the appliances.
This furnace must use indoor air for combustion. It cannot be in-
stalledasadirectvent(i.e.,sealedcombustion)furnace.
Most homes will require outside air be supplied to the furnace
area by means of ventilation grilles or ducts connecting directly
to the outdoors or spaces open to the outdoors such as attics or
crawl spaces.
C ATEGORY IV 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
CategoryIVenting isventingatanon-positivepressure. Afurnace
vented as Category I is considered a fan-assisted appliance and
theventsystemdoesnothavetobe“gastight.” NOTE: Singlestage
gas furnaces with induced draft blowers draw products of com-
bustion through a heat exchanger allowing, in some instances,
common venting with natural draft appliances (i.e. water heat-
ers). All installations must be vented in accordance with National
FuelGasCodeNFPA 54/ANSIZ223.1 -latestedition.InCanada,the
furnaces must be vented in accordance with the National Stan-
dardofCanada,CAN/CSAB149.1andCAN/CSAB149.2-latestedi-
tions and amendments.
NOTE: Masonry vent kit (MVK-01 and MVK-02) is to only be used
on interior masonry chimneys or qualifying exterior masonry
chimney applications identified in the MVK kit installation
instructions. To ensure safe and reliable operation, use only the
kit listed for your model.
Kit Input KBTU Range Limit Setting
MVK-01 40-100 250°F
MVK-02 120-140 290°F
Note: This kitis for use on Amana®brand and Goodman®brand 80%AFUE,
33” tall “H” and “S” model furnaces installed in the upflow position only.
NOTE:TheverticalheightoftheCategoryIventingsystemmustbe
at least as great as the horizontal length of the 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
TheminimumventdiameterfortheCategoryIventingsystemisas
shown:
UPFLOW COUNTERFLOW
40 4 Inch 4 Inch
60 4 Inch 4 Inch
80 4 Inch 4 Inch
100 5 Inch 5 Inch
120 5 Inch N/A
140 5 Inch N/A
MODEL MINIMUM VENT
Undersomeconditions,largerventsthanthose shownabovemay
berequiredorallowed. Whenanexistingfurnaceisremovedfrom
aventingsystemservingotherappliances,theventingsystemmay
be too large to properly vent the remaining attached appliances.
Upflow or Horizontal units are shipped with the induced draft
blowerdischargingfromthetopofthefurnace. (“Top”isasviewed
for an upflow installation.) The induced draft blower can be ro-
tated 90 degrees with the (0270F01119) chimney transition bot-
tom kit for Category I venting. For upflow models installed verti-
cally or horizontally, a four inch single wall pipe can be used to
extend the induced draft blower outlet 1/2” beyond the furnace
cabinet. THIS PRODUCT IS NOT DESIGNED FOR COUNTERCLOCK-
WISEINDUCEDDRAFTBLOWERROTATION.
Vent the furnace in accordance with the National Fuel Gas Code
NFPA 54/ANSI Z223.1 - latest edition.
Venting- FurnaceInstalledinHorizontalPosition
THIS FURNACE IS NOT DESIGN CERTIFIED TO BE HORIZONTALLY
VENTEDTHROUGHANEXTERIORSIDEWALL.
The following describes an optional venting procedure when the
furnace is installed in the horizontal left discharge position.
To rotate the induced draft blower clockwise, you will need to
purchase one (0270F01119) chimney transition bottom kit.
1. Disconnect electrical power from the furnace.
2. Disconnecttheinduceddraftblowerpowerleads,fluepipe,
and pressure switch tubing.
3. Removetheroundcutoutfromtherightsideofthewrapper.
4. Remove and save the four screws that fasten the induced
draft blower to the flue collector box.
5. Remove and save the three screws that hold the chimney
assembly to the induced draft blower.
6. Remove and save the four screws that fasten the chimney
toptothechimneybottom.

10
7. Removethechimney transitionbottomfromthetransition
bottomkit.
8. Install the chimney top with the four screws retained from
step 6 onto the new chimney transition bottom from the
transition bottom kit.
9. Remove the induced draft blower and install the new
chimney assembly to it using the three screws retained
fromstep5.
10. Rotate the induced draft blower 90 degrees to the right,
feedthefluepipethroughtheroundcutoutfromtheoutside
of the wrapper, and fit onto the chimney top assembly.
Securethepipetothechimneytopfromthefront,top,and
bottom using (3) screws and rotating the induced draft
blower to properly orient the assembly. NOTE: If the pipe
sectionislessthan18”,thenattachitdirectlytothechimney
topon3sidesandfeeditthroughtheroundcutoutfromthe
inside of the wrapper.
11. Reattach the induced draft blower using the (4) screws
retained from step 3. Ensure the gasket located between
the induced draft blower and collector box is rotated
accordingly.
12. Reconnect the induced draft blower power leads. NOTE: If
thewiresarenotlongenough,pullextrawirefromthewire
bundleintheblowercompartment.
13. Reconnecttheremainingfluepipe,andthepressureswitch
tubing.Ensurethatallwiresandthepressureswitchtubing
is at least one inch from the flue pipe, or any other hot
surface.
14. Restorepowertofurnace.
NOTE: In a horizontal installation the air conditioning coil must
be adequately supported by proper brackets and supports.
Inadequatecoil supportcan resultin furnace cabinet distortion
and air leakage.
Counterflow units are shipped with the induced draft blower dis-
chargingfromthe topof the furnace. (“Top” asviewedforacoun-
terflow installation.)
Vent the furnace in accordance with the National Fuel Gas Code
NFPA54/ANSI Z223.1-latest edition.
N EVER ALLOW THE PRODUCTS OF COMBUSTION , INCLUDING CARBON
MONOXIDE , TO ENTER THE RETURN DUCTWORK OR CIRCULATION AIR
SUPPLY .
WARNING
EXTERIOR MASONRY CHIMNEYS (CATEGORY IFURNACES ONLY)
An exterior masonry chimney is defined as a “Masonry” chimney
exposedtotheoutdoorsononeormoresidesbelowtheroofline.”
The ability to use a clay lined masonry chimney depends on a
parameter not associated with interior chimneys. This variable is
the geographic location of the installation. Researchers have dis-
coveredthatthewinterdesign temperatures have adirectimpact
on the suitability of this type of 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
This checklist serves as a summary of the items to be checked
before venting an 80+ furnace into a masonry chimney. In addi-
tion,werecommendthataqualified serviceman use thischecklist
to perform a yearly inspection of the furnace venting system.
This checklist is only a summary. For detailed information on
each of the procedures mentioned, see the paragraph referenced
witheachitem.

11
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)
CHECK 1 -PROPER CHIMNEY TERMINATION.
A masonry chimney used as a vent for gas fired equipment must
extend at least three feet above the highest point where it passes
through the roof. It must extend at least two feet higher than any
portion of a building within a horizontal distance of 10 feet. In
addition, the chimney must terminate at least 3 feet above any
forcedairinletlocatedwithin10feet.Thechimneymustextendat
leastfive feet above the highestconnected equipmentdraft hood
outlet or flue collar.
Ifthechimneydoesnotmeettheseterminationrequirements,but
all other requirements in the checklist can be met, it may be pos-
sible for a mason to extend the chimney. If this will not be practi-
cal, 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
CHECK 2 - ANY SOLID OR LIQUID FUEL APPLIANCES VENTED INTO THIS
CHIMNEY CHANNEL
Solid fuel appliances include fireplaces, wood stoves, coal fur-
naces, and incinerators.
Liquid fuel appliances include oil furnaces, oil-fired boilers and
oil-fired water heaters.

12
Flexible liners should be hung straight or nearly straight. If it is
spiraledinthechimneyandingoodcondition,itshouldberehung.
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.
Thesurfaces of theliner mustbe physically sound.If gaps or holes
arepresent,themetallinermustberemovedandreplaced(Fix4).
Finally, confirm that the metal liner is the correct size for the
appliances to be installed. Use the GAMA tables and 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 connec-
tor to inspect the clay tile liner. If any of the following problems
arepresent:
• Tile sections misaligned
• Tile sections missing
• Gaps between tile sections
• Signs of condensate drainage at the cleanout or vent
connectors
• Mortar protruding from 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 mini-
mum size established by the tables in National Fuel Gas Code
NFPA 54/ANSI Z223.1 - latest edition and in the National Standard
of Canada, CAN/CSA B149.1 and CAN/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
source of dilution air is required.
Dilution air cannot be obtained through:
• Induced draft appliances
• Natural draft appliances with vent dampers
Sufficient dilution air can ordinarily be obtained through the draft
hood of a natural draft appliance only if the appliance’s vent
connector does not include a vent damper. If dilution air will not
be available, the chimney must be relined (Fix 4).
CHECK 7-COMPLETE THE INSTALLATION.
If Checks 1 through 6 have been satisfactory, and the liner is an
acceptable size as determined by the tables in National Fuel Gas
Code NFPA 54/ANSI Z223.1 - latest edition and in the National
StandardofCanada,CAN/CSAB149.1andCAN/CSAB149.2-latest
editionsand 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:
Appliances which burn propane (sometimes referred to as LP (liq-
uefied petroleum)) gas are considered gas-fired appliances.
CHECK 3-CHIMNEY CROWN CONDITION.
Damage from condensate usually shows up first in the crown. If
anyofthefollowingtroublesignsarepresent,theconditionofthe
crown is not satisfactory:
a) Crown leaning
b) Bricks missing
c) Mortar missing
d) Tile liner cracked
e) No tile liner
f) Salt staining at mortar joints. (White stains, and mortar
becomes sandy and/or erodes.)
Forproblems a, b,or c,see Fix 3.If problemsd, e, orf arepresent,
seeFix4.IMPORTANT:ItmaybenecessarytofollowbothFix3and
Fix 4.
CHECK 4-DEBRIS IN CLEANOUT
A cleanout (dropleg) must be present such that the upper edge of
thecleanoutcoverisatleast12inchesbelowtheloweredgeofthe
lowest chimney inlet opening.
A chimney without a cleanout could become partially blocked by
debris. If no cleanout is present, the chimney must be relined (Fix
4). Remove the cleanout cover, and examine the cleanout for de-
bris. If significant amounts of any of the following are found:
• Fuel oil residue
• Bricks
• Mortar or sand
• Pieces of the tile liner
• Rusted pieces of the metallic liner - reline the chimney
(Fix 4).
CHECK 5-LINER CONDITION.
If a metal liner is present, it must be checked. It cannot be as-
sumed that all existing metal liners are correctly installed and in
good condition.
Removethelowestexistingventconnector,andexaminetheinside
oftheelboworteeatthebaseoftheliner. Asmallamountofsoot
may be considered acceptable, provided the installer vacuums it
away. If rusted pieces of the liner have collected here, the metal
liner must be removed and replaced (Fix 4).
Next, gently tap the inside of the liner with a Phillips screwdriver.
If the screwdriver perforates the liner, or if the tapping does not
sound like metal hitting metal, the liner must be removed and
replaced (Fix 4).
Remember that all appliances must be vented inside the liner.
Venting one appliance inside the liner and another appliance out-
side the liner is not acceptable.
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 with the
chimney 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 helpful here.

13
If B vent is to be used, it must be supported adequately. Supports
(suchasfirestopsorthimbles)mustbeusedtopreventtheB vent
from coming into direct contact with the tile liner or chimney
walls. Direct contact would result in higher heat loss, with an
increased possibility of poor venting system performance.
It is not acceptable to vent one appliance inside the B vent and
otherappliancesoutside.TheexcessspacebetweentheBventand
thechimney wallsmust becovered atthe topof thechimney by a
weatherproof, corrosion resistant flashing.
TheBventshouldthenbetoppedwithalistedventcap.Thelisted
vent cap will, when installed per the manufacturer’s instructions,
prevent problems due to rain, birds, or wind effects.
A B-vent installed as described in this section is considered to be
an enclosed vent system, and the sizing tables in National Fuel
Gas Code NFPA 54/ANSI Z223.1 - latest edition and in the National
StandardofCanada,CAN/CSAB149.1andCAN/CSAB149.2-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
should be acceptable.
• If the combustion air supplied to the furnace will be
contaminated with compounds containing chlorine or
fluorine, a liner of AL 29-4C stainless steel should be
used. Common sources of chlorine and fluorine
compoundsincludeindoorswimming poolsandchlorine
bleaches, paint strippers, adhesives, paints, varnishes,
sealers, waxes (which are not yet dried) and solvents
used during construction and remodeling. Various
commercialandindustrialprocessesmayalsobesources
of chlorine/fluorine compounds.
• Heavier gauge 300 and 400 series stainless steel liners
were developed for use with oil or solid fuel appliances.
They are not suitable for use with gas-fired appliances.
Flexible liners specifically intended and tested for gas
applications are listed in the UL “Gas and Oil Equipment
Directory”. (UL Standard 1777).
Forsizing of flexible liners, see the tables in the National Fuel Gas
Code NFPA 54/ANSI Z223.1 - latest edition and in the National
StandardofCanada,CAN/CSAB149.1andCAN/CSAB149.2-latest
editions and amendments.
To install the liner, read and follow the liner manufacturer’s in-
structions and your local codes. Excess liner length should be
pulledoutofthechimneyandcutoff.Usecautionwhendoingthis,
as the cut edges of flexible liners may be sharp. Do not spiral
excess liner inside of the chimney. Support the liner as recom-
mended by the liner manufacturer.
Some manufacturers of flexible liners offer an insulation sleeve
designedto be added to the liner before it is installed in the chim-
ney. (Poured insulation, either vermiculite or other materials, is
no longer recommended.) Insulation will need to be added to the
flexible liner if:
• It is required by the liner manufacturer’s instructions.
• Extremelycoldweather
• Longventconnectors
• Masonrychimneyswithnoairgapbetweenthelinerand
the bricks. (In practice, this can be difficult to detect.)
• Exterior chimneys (The tables in National Fuel Gas Code
NFPA 54/ANSI Z223.1 - latest edition and in the National
StandardofCanada,CAN/CSAB149.1andCAN/CSAB149.2
- latest editions and amendments assume interior
chimneys.)
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).
FIX 1- 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 as-
semblymustthenterminateabovetheroofinaccordancewiththe
manufacturer’s instructions.
Insomecases,ashorterextensionabovetheroofmaybe possible
with a liner than would be required with a masonry chimney.
For further information on relining, see Fix 4.
FIX 2-CHANGEVENTING ARRANGEMENTS
If the masonry chimney has more than one channel, it may be
possible to vent the gas appliances into one channel and vent the
solid or liquid fuel appliance(s) into another channel(s). Do not
vent an 80+ Furnace inside of a metal liner with other appliances
vented outside the liner.
Alternatively,thehomeownermayagreetodiscontinueuseofthe
fireplace(solid fuel appliance).If so, thetile liner mustbe cleaned
to remove creosote buildup. The fireplace opening must then be
permanently sealed.
If oil-fired appliance(s) are being replaced by gas-fired
appliance(s),thetilelinermustfirstbecleanedtoremovethefuel
oil residue.
If none of the above options is practical, the furnace may need to
be vented vertically with a B Vent.
Under some conditions, a 90%+ furnace could be installed rather
thanan80%furnace.The90%+furnacecanbeventedhorizontally
or vertically through PVC pipe.
FIX 3- REBUILD THE CROWN
Ifthechimney crown isdamaged,a qualified masonmustrepair it
in accordance with nationally recognized building codes or stan-
dards. One such standard which may be referenced is the Stan-
dard for Chimneys, Fireplaces, Vents, and Solid Fuel Burning Ap-
pliances, ANSI/NFPA 211.
FIX 4 - RELINING
Relining options include B vent and flexible liners.
If the chimney has diagonal offsets, B vent probably cannot be
used.

14
115VOLTLINECONNECTIONS
Beforeproceedingwithelectricalconnections,ensurethatthesup-
ply voltage, frequency, and phase correspond to that specified on
the unit rating plate. Power supply to the furnace must be NEC
Class 1, and must comply with all applicable codes. The furnace
must be electrically grounded in accordance with local codes or,
in their absence, with the latest edition of The National Electric
Code,ANSINFPA 70and/orTheCanadianElectricCodeCSAC22.1.
Use a separate fused branch electrical circuit containing properly
sized wire, and fuse or circuit breaker. The fuse or circuit breaker
must be sized in accordance with the maximum overcurrent pro-
tectionspecified on the unit rating plate. An electrical disconnect
must be provided at the furnace location.
Linevoltagewiringmustenterintothejunctionboxprovidedwith
thefurnace.
NOTE: Line polarity must be observed when making field
connections.
FOSSIL FUEL APPLICATIONS
This furnace can be used in conjunction with a heat pump in a
fossil fuel application. A fossil fuel application refers to a com-
bined gas furnace and heat pump installation which uses an out-
doortemperaturesensortodeterminethemostcostefficientmeans
of heating heat pump or gas furnace.
A heat pump thermostat with two stages of heat is required to
properly use a furnace in conjunction with a heat pump. Refer to
the fossil fuel kit installation instructions for additional thermo-
statrequirements.
Strictly follow the wiring guidelines in the fossil fuel kit installa-
tion instructions. All furnace connections must be made to the
furnaceintegratedcontrolmoduleandtheFURNACEterminalstrip
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
Line voltage connections can be made through either the right or
left side panel. The furnace is shipped configured for a right side
electrical connection. To make electrical connections through the
oppositesideofthefurnace,thejunctionboxmustberelocatedto
the left side prior to making electrical connections. To relocate
the junction box, perform the following steps.
T O PREVENT PERSONAL INJURY OR DEATH DUE TO ELECTRIC SHOCK ,
DISCONNECT ELECTRICAL POWER BEFORE INSTALLING OR SERVICING THIS
UNIT .
WARNING
1. Removebothdoorsfromthefurnace.
2. Remove and save the screws holding the junction box to
the right side of the furnace.
• The previous liner was properly sized and installed, and
suffered from condensation damage.
• It is required by your local building codes.
Even if none of those three conditions exist which require addi-
tional liner insulation, the installer may wish to consider it if:
• The local climate is very cold.
• The chimney is very tall.
• The vent connectors used are very long or have a large
numberofelbows.
• Local experience indicates that flexible liners installed
without insulation are likely to have condensation
problems.
Insulation must be selected and installed in accordance with the
liner manufacturer’s instructions.
Finally, cap the chimney and terminate the liner in accordance
with the liner manufacturer’s instructions.
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 alter-
ationtocomplywithelectricalcodesshouldnotberequired. Wires
are color coded for identification purposes. Refer to the wiring
diagram for wire routings. If any of the original wire as supplied
withthefurnacemustbereplaced,itmustbereplacedwithwiring
material having a temperature rating of at least 105° C. Any re-
placement wiring must be a copper conductor.

15
3. Models that have the junction box located in the burner
compartment will need to move the junction box directly
over.
4. Attachthejunctionboxtotheleftsideofthefurnace,using
thescrews removed in step 2.
5. Check the location of the wiring. Confirm that it will not be
damagedbyheatfromtheburnersorbytherotationofthe
fan. Also confirm that wiring location will not interfere
with filter removal or other maintenance.
After the junction box is in the desired location, use washers to
connect field-supplied conduit to the junction box in accordance
with NEC and local codes. Connect hot, neutral, and ground wires
as shown in the furnace wiring diagram. The wires and ground
screw are located in the furnace junction box.
NOTE:Indownflowapplicationsthepowerleadsshouldberouted
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 removal or
othermaintenance.
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 ensureproperunitgrounding,thegroundwireshouldrunfrom
the furnace ground screw located inside the furnace junction 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 following check.
1. Measureresistancebetweentheneutral(white)connection
andone of the burners.
2. Resistance should measure 10 ohms or less.
Thisfurnaceisequippedwithablowerdoorinterlockswitchwhich
interruptsunitvoltagewhentheblowerdoorisopenedforservic-
ing. Do not defeat this switch.
24VOLT THERMOSTAT WIRING
NOTE: Wire routing must not interfere with circulator blower
operation, filter removal, or routine maintenance.
Low voltage connections can be made through either the right or
left side panel. Thermostat wiring entrance holes are located in
theblowercompartment. Thefollowingfigureshowsconnections
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 VA transformer to facilitate use
with most cooling equipment. Consult the wiring diagram, lo-
cated on the blower compartment door, for further details of 115
Volt and 24 Volt wiring.
Asingle-stagethermostatwithonlyoneheatingstagecanbeused
to control this furnace.
GME8&AMEH8FURNACES WITH 2-STAGE CONDENSER FIELD
WIRING
TheGME8and AMEH8 modelfurnacesmaybeusedwitha2-stage
outdoor air conditioner. A two 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
powerat125VAC.
1. Install the field supplied relay on the control mounting panel
near the furnace ignition control. The relay should be in-
stalled such that the motor leads will reach the relay contact
terminals.
2. Connectthe“Y2”(highstagecool)thermostatterminaltoone
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
beused.
3. Connectthecommonterminalofthefieldsuppliedrelaytothe
“LINE-H” terminal on the furnace ignition control. Use wiring
having copper conductors only and a temperature rating of at
least 105°C.
4. Using the GME8 airflow tables in this manual, determine the
motor speed tap needed to deliver the required high stage
cooling airflow. Connect the selected motor speed tap to the
normallyopen terminalonthefield suppliedrelay. Usewiring
having copper conductors only and a temperature rating of at
least 105°C.
5. See the wiring schematic below.

16
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 & AMEH8 Furnaces
with 2-Stage Condenser
SETTING THEHEAT ANTICIPATOR
The heat anticipator in older, non electronic room thermostats
must be adjusted correctly to obtain the proper number of cycles
per hour and to prevent “overshooting” the setting. Set the heat
anticipator setting to 0.7 amps. Follow the thermostat
manufacturer’s instructions on how to adjust the heat anticipa-
tor.
115VOLTLINECONNECTION OFACCESSORIES
ELECTRONICAIR CLEANER
(GME8,AMEH8,GDH8,ADSH8&(A/G)MH8MODELSONLY)
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 volt-
ageaccessory terminals forcontrolling powerto an optionalfield-
supplied electronic air cleaner.
The accessory load specifications are as follows:
Electronic Air Cleaner 1.0 Amp maximum at 120 VAC
Turn OFF power to the furnace before installing any accessories.
Follow the air cleaner manufacturers’ instructions for locating,
mounting, grounding, and controlling these accessories. Acces-
sory wiring connections are to be made through the 1/4" quick
connect terminals provided on the furnace integrated control
module. The electronic air cleaner hot terminal is identified as
EAC-H and the neutral terminal is identified as NEUTRAL. All field
wiring must conform to applicable codes. Connections should be
made as shown in the following illustration.
EAC-H Line Transformer Line Transformer EAC
Air Cleaner
Control Module
Hot 120 VAC Neutral 120 VAC
Optional
Accessories
GME8,AMEH8,GDH8,ADSH8&(A/G)MH8MODELSONLY
If it is necessary for the installer to supply additional line voltage
wiring to the inside of the furnace, the wiring must conform to all
localcodes,andhaveaminimumtemperatureratingof105°C. All
linevoltagewire splicesmust be madeinside the furnacejunction
box.
The integrated control module electronic air cleaner terminals
(EAC)areenergizedwith115voltswheneverthecirculatorblower
is energized.
24VAC HUMIDIFIER
The yellow wire connected to the I.D. Blower pressure switch is
powered anytime the pressure switch is closed and provides 24
VAC humidifier control. Remove the yellow wire and connect a
field supplied jumper wire with a “piggyback” terminal to the
pressureswitchterminal.Reconnecttheyellowwiretothe“piggy-
back” terminal on the jumper wire and then connect the 24 VAC
lineofthehumidifiertothestrippedendofthejumperwire.Using
a wire nut or a field-supplied quick connect terminal can make
this connection. The wiring must conform to all local and national
codes.ConnecttheCOMsideofthehumidifiertotheCterminalon
thefurnacecontrolboard(ortotheCOMsideofthe24VACtrans-
former). DO NOT CONNECT 115V HUMIDIFIER TO THESE TERMI-
NALS.
G AS S UPPLY AND P IPING
The furnace rating plate includes the approved furnace gas input
ratingandgastypes. Thefurnacemustbeequippedtooperateon
the type of gas applied. This includes any conversion kits re-
quired for alternate fuels and/or high altitude.
CAUTION
T O PREVENT UNRELIABLE OPERATION OR EQUIPMENT DAMAGE , THE
INLET GAS SUPPLY PRESSURE MUST BE AS SPECIFIED ON THE UNIT
RATING PLATE WITH ALL OTHER HOUSEHOLD GAS FIRED APPLIANCES
OPERATING .
Inlet gas supply pressures must be maintained within the ranges
specified in the following table. The supply pressure must be
constant and available with all other household gas fired appli-
ancesoperating. Theminimumgassupplypressuremustbemain-
tained to prevent unreliable ignition. The maximum must not be
exceededtopreventunitoverfiring.
NOTE:Donotremovethegasvalveinletplugbeforethegaslineis
installed. Replace if water or debris has been introduced.

17
Natural Gas Minimum: 4.5" w.c. Maximum: 10.0" w.c.
Propane Gas Minimum: 11.0" w.c. Maximum: 13.0" w.c.
INLET GAS SUPPLY PRESSURE
NOTE: Adjustingtheminimumsupplypressurebelowthelimitsin
the above table could lead to unreliable ignition. Gas input to the
burnersmustnotexceedtheratedinputshownontheratingplate.
Overfiring of the furnace can result in premature heat exchanger
failure. Gas pressures in excess of 13 inches water column can
also cause permanent damage to the gas valve.
At all altitudes, the manifold pressure must be within 0.3 inches
w.c. of that listed in the Specification Sheet applicable to your
modelforthefuelused.Atallaltitudesandwitheitherfuel,theair
temperature rise must be within the range listed on the furnace
nameplate. Should this appliance be converted to LP, refer to the
instructions included in the factory authorized LP conversion kit.
HIGH ALTITUDE DERATE
IMPORTANTNOTE:Thefurnace,asshipped,requiresnochangeto
runbetween0-5500feet.Donotattempttoincreasethefiringrate
by changing orifices or increasing the manifold pressure below
5500feet.Thiscancausepoorcombustionandequipmentfailure.
High altitude installations above 5500 feet may require both a
pressure switch and an orifice change. These changes are neces-
sarytocompensateforthenaturalreductioninthedensityofboth
the gas fuel and the combustion air at higher altitude.
For installations above 5500 feet, please refer to your distributor
for required kit(s).
Contact the distributor for a tabular listing of appropriate
manufacturer’s kits for propane gas and/or high altitude installa-
tions. The indicated kits must be used to insure safe and proper
furnaceoperation. All conversions must beperformed by a quali-
fied installer, or service agency.
PROPANEGASCONVERSION
WARNING
P OSSIBLE PROPERTY DAMAGE , PERSONAL INJURY OR DEATH MAY
OCCUR IF THE CORRECT CONVERSION KITS ARE NOT INSTALLED . T HE
APPROPRIATE KITS MUST BE APPLIED TO ENSURE SAFE AND PROPER
FURNACE OPERATION . A LL CONVERSIONS MUST BE PERFORMED BY A
QUALIFIED INSTALLER OR SERVICE AGENCY .
This unit is configured for natural gas. The appropriate
manufacturer’s propane gas conversion kit, must be applied for
propane gas installations. Refer to the “Propane Gas and/or High
Altitude Installations” section for details.
If converting to LP gas, it is recommended that an LPLP0* kit also
beinstalled. Theuseofthiskitwillpreventthefurnacefromfiring
when the LP gas supply pressure is too low to support proper
combustion.
ModelsusingSingleStageGasValves
Altitude Gas Kit Orifice Manifold
Pressure Pressure Switch
Propane LPT-03 #55 10.0" w.c.
NOTE:
*MS81405DN**
mo
d
e
l
s u
tili
ze
#43
or
ifi
ces
i
n
N
a
t
ura
l
gas
applications.
0 - 5500
Natural None #45 3.5" w.c.
None
Modelsusing2-StageGasValves
High
Stage Low Stage
Natural None #45 3.5" w.c. 1.9" w.c. None
Propane LPM-06 #55 10.0" w .c. 6.0" w.c. None
0 - 5500
NOTE: *MH81405DN** models utilize #43 orifices in Natural gas
applications.
Gas Altitude Kit Orifice
Manifold Pressure Pressure
Switch
Change
Contact your distributor for a tabular listing of appropriate
manufacturer’s kits for propane gas and/or high altitude installa-
tions. The indicated kits must be used to insure safe and proper
furnace operation. All conversions must be performed by a quali-
fied installer, or service agency.
GASPIPINGCONNECTIONS
T O AVOID POSSIBLE UNSATISFACTORY OPERATION
PMENT , USE THE PROPER SIZE
OF NATURAL / PROPANE GAS PIPING NEEDED WHEN RUNNING PIPE FROM
THE METER / TANK TO THE FURNACE .
OR EQUIPMENT
DAMAGE DUE TO UNDERFIRING OF EQUI
WARNING
When sizing gas lines, be sure to include all appliances which will
operate simultaneously.
Thegaspipingsupplyingthefurnacemustbeproperlysizedbased
on the gas flow required, specific gravity of the gas, and length of
therun. The gas line installation must comply with localcodes, or
in their absence, with the latest edition of the National Fuel Gas
Code,NFPA54/ANSIZ223.1.

18
Natural Gas Capacity of Pipe
In Cubic Feet of Gas Per Hour (CFH)
Length of Nominal Black Pipe Size
Pipe in Feet 1/2" 3/4" 1" 1 1/4" 1 1/2"
10 132 278 520 1050 1600
20 92 190 350 730 1100
30 73 152 285 590 980
40 63 130 245 500 760
50 56 115 215 440 670
60 50 105 195 400 610
70 46 96 180 370 560
80 43 90 170 350 530
90 40 84 160 320 490
100 38 79 150 305 460
(Pressure 0.5 psig or less and pressure drop of 0.3" W.C.; Based on
0.60 Specific Gravity Gas)
CFH = BTUH Furnace Input
Heating Value of Gas (BTU/Cubic Foot)
To connect the furnace to the building’s gas piping, the installer
must supply a ground joint union, drip leg, manual shutoff valve,
and line and fittings to connect to gas valve. In some cases, the
installer may also need to supply a transition piece from 1/2" pipe
to a larger pipe size.
The following stipulations apply when connecting gas piping.
• Use black iron or steel pipe and fittings for the building
piping.
• Use pipe joint compound on male threads only. Pipe
joint compound must be resistant to the action of the
fuel used.
• Use ground joint unions.
• Install a drip leg to trap dirt and moisture before it can
enter the gas valve. The drip leg must be a minimum of
three inches long.
• Install a 1/8" NPT pipe plug fitting, accessible for test
gageconnection,immediatelyupstreamofthegassupply
connectionto the furnace.
• Use two pipe wrenches when making connection to the
gas valve to keep it from turning. The orientation of the
gasvalveonthemanifoldmustbemaintainedasshipped
fromthefactory.
• Install a manual shutoff valve between the gas meter
andunit within six feet of the unit. If a union is installed,
the union must be downstream of the manual shutoff
valve,betweentheshutoffvalveandthefurnace.
• Tighten all joints securely.
• Connect the furnace to the building piping by one of the
following methods:
–Rigid metallic pipe and fittings.
–Semi-rigid metallic tubing and metallic fittings.
Aluminum alloy tubing must not be used in exterior
locations.
–Use listed gas appliance connectors in accordance
with their instructions. Connectors must be fully in
the same room as the furnace.
–Protect connectors and semi-rigid tubing against
physical and thermal damage when installed. Ensure
aluminum-alloy tubing and connectors are coated to
protect against external corrosion when in contact
with masonry, plaster, or insulation, or subjected to
repeatedwettingbyliquidssuchaswater(exceptrain
water),detergents,orsewage.
DripLe g
Ground Joint Pipe Union
To Be Installed
Ahead of Gas Valve
OPTIONAL:
Reducing Coupling
1/2” x 1/8” with 1/8”
Pipe Plug to Measure
Line Gas Pressure
Height Required
By Local Code
Location of Manual Valve
(Installed Ahead of
Ground Joint Pipe Union)
General Furnace Layout
UPFLOWINSTALLATIONS
Aground jointunion, drip leg, and manual shutoff valvemust also
be supplied by the installer. In some cases, the installer may also
need to supply a transition piece from 1/2" to another pipe size.
When the gas piping enters through the side of the furnace, the
installer must supply the following fittings (starting from the gas
valve nipple elbow):
• Straight pipe to reach the exterior of the furnace.
• A ground joint union, drip leg, and manual shutoff valve
must also be supplied by the installer.
COUNTERFLOWINSTALLATIONS
Whenthegaspipingentersthroughtheleftsideofthefurnace,the
installer must supply the following fittings, starting at the gas
valve:
- Nipple
- Elbow
- Straight pipe to reach the exterior of the furnace
A ground joint union, drip leg and manual shutoff valve must also
be supplied by the installer. In most cases, the installer may also
need to supply a transition piece from ½” to another pipe size.
GAS PIPING CHECKS
Beforeplacingunitinoperation,leaktesttheunitandgasconnec-
tions.

19
T O AVOID THE POSSIBILITY OF EXPLOSION OR FIRE , NEVER USE A MATCH
OR OPEN FLAME TO TEST FOR LEAKS .
WARNING
Check for leaks using an approved chloride-free soap and water
solution,anelectroniccombustiblegasdetector,orotherapproved
testingmethods.
NOTE: Neverexceedspecifiedpressuresfortesting. Higherpressure
may damage the gas valve and cause subsequent overfiring,
resulting in heat exchanger failure.
Disconnect this unit and shutoff valve from the gas supply piping
systembeforepressuretestingthesupplypipingsystemwithpres-
sures in excess of 1/2 psig (3.48 kPa).
This unit must be isolated from the gas supply system by closing
its manual shutoff valve before pressure testing of gas supply
piping system with test pressures equal to or less than 1/2 psig
(3.48 kPa).
PROPANE GAS TANKS AND PIPING
I F THE GAS FURNACE IS INSTALLED IN A BASEMENT , AN EXCAVATED
AREA OR CONFINED SPACE , IT IS STRONGLY RECOMMENDED TO
CONTACT A PROPANE SUPPLIER TO INSTALL A GAS DETECTING WARNING
DEVICE IN CASE OF A GAS LEAK .
S
INCE PROPANE GAS IS HEAVIER THAN AIR , ANY LEAKING GAS CAN
SETTLE IN ANY LOW AREAS OR CONFINED SPACES .
P
ROPANE GAS ODORANT MAY FADE , MAKING THE GAS UNDETECTABLE
EXCEPT WITH A WARNING DEVICE .
•
•
WARNING
Agasdetectingwarningsystemistheonlyreliablewaytodetecta
propanegas leak.Rust can reduce the level of odorant in propane
gas. Do not rely on your sense of smell. Contact a local propane
gas supplier about installing a gas detecting warning system. If
the presence of gas is suspected, follow the instructions in the
Safety Considerations section of this manual.
All propane gas equipment must conform to the safety standards
of the National Board of Fire Underwriters, NBFU Manual 58.
For satisfactory operation, propane gas pressure must be 10 inch
WC at the furnace manifold with all gas appliances in operation.
Maintaining proper gas pressure depends on three main factors:
1. Vaporization rate, depending on temperature of the liquid,
and “wetted surface” area of the container or containers.
2. Proper pressure regulation. (Two-stage regulation is
recommendedfor both cost and efficiency).
3. Pressure drop in lines between regulators, and between
second stage regulator and the appliance. Pipe size will
depend on length of pipe run and total load of all
appliances.
Complete information regarding tank sizing for vaporization, rec-
ommended regulator settings, and pipe sizing is available from
most regulator manufacturers and propane gas suppliers.
Use a pipe thread compound that is approved for natural gas and
LP gas.
Refer to the following illustration for typical propane gas instal-
lations and piping.
200 PSIG
Maximum
5 to 15 PSIG
(20 PSIG Max.) Continuous
11" W.C.
Second Stage
Regulator
First Stage
Regulator
Propane Gas Installation (Typ.)
PROPANE GAS PIPING CHARTS
3/8" 1/2" 5/8" 3/4" 7/8" 1/2" 3/4"
10 730 1,700 3,200 5,300 8,300 3,200 7,500
20 500 1,100 2,200 3,700 5,800 2,200 4,200
30 400 920 2,000 2,900 4,700 1,800 4,000
40 370 850 1,700 2,700 4,100 1,600 3,700
50 330 770 1,500 2,400 3,700 1,500 3,400
60 300 700 1,300 2,200 3,300 1,300 310
80 260 610 1,200 1,900 2,900 1,200 2,600
100 220 540 1,000 1,700 2,600 1,000 2,300
125 200 490 900 1,400 2,300 900 2,100
150 190 430 830 1,300 2,100 830 1,900
175 170 400 780 1,200 1,900 770 1,700
200 160 380 730 1,100 1,800 720 1,500
Sizing Between First and Second Stage Regulator*
Maximum Propane Capacities listed are based on 2 psig pressure drop at 10 psig setting.
Capacities in 1,000 BTU/hour.
Nominal Pipe Size
Schedule 40
Tubing Size, O.D. Type L
Pipe or
Tubing
Length,
Feet
3/8" 1/2" 5/8" 3/4" 7/8" 1-1/8" 1/2" 3/4" 1" 1-1/4" 1-1/2"
10 39 92 199 329 501 935 275 567 1,071 2,205 3,307
20 26 62 131 216 346 630 189 393 732 1,496 2,299
30 21 50 107 181 277 500 152 315 590 1,212 1,858
40 19 41 90 145 233 427 129 267 504 1,039 1,559
50 18 37 79 131 198 376 114 237 448 913 1,417
60 16 35 72 121 187 340 103 217 409 834 1,275
80 13 29 62 104 155 289 89 185 346 724 1,066
100 11 26 55 90 138 255 78 162 307 630 976
125 10 24 48 81 122 224 69 146 275 567 866
150 9 21 43 72 109 202 63 132 252 511 787
200 8 19 39 66 100 187 54 112 209 439 665
250 8 17 36 60 93 172 48 100 185 390 590
Pipe or
Tubing
Length,
Feet
Nominal Pipe Size
Schedule 40
Tubing Size, O.D. Type L
Sizing Between Second Stage and Appliance Regulator*
Maximum Propane Capacities listed are based on 2 psig pressure drop at 10 psig setting.
Capacities in 1,000 BTU/hour.

20
C IRCULATING A IR AND F ILTERS
DUCTWORK -AIR FLOW
N EVER ALLOW THE PRODUCTS OF COMBUSTION , INCLUDING CARBON
MONOXIDE , TO ENTER THE RETURN DUCT WORK OR CIRCULATION AIR
SUPPLY .
WARNING
Ductsystems and registersizes must beproperly designed for the
CFM and external static pressure rating of the furnace. Ductwork
should be designed in accordance with the recommended meth-
ods of “Air Conditioning Contractors of America” Manual D.
A duct system must be installed in accordance with Standards of
the National Board of Fire Underwriters for the Installation of Air
Conditioning, Warm Air Heating and Ventilating Systems. Pam-
phlets No. 90A and 90B.
A closed return duct system must be used, with the return duct
connectedtothefurnace.NOTE: Ductworkmustneverbeattached
to the back of the furnace. For installations requiring more than
1800 CFM, use a bottom return or two sided return. Supply and
returnconnectionstothefurnacemaybemadewithflexiblejoints
to reduce noise transmission. To prevent the blower from inter-
fering with combustion air or draft when a central return is used,
aconnectingductmust be installedbetweentheunit and theutil-
ity room wall. Furnace is shipped with the top flanges in the flat
position. Before installing a coil or ducts, the flanges must be
bent90°. Aroom,closet,oralcovemustnotbeusedasareturnair
chamber.
When the furnace is used in connection with a cooling unit, the
furnace should be installed in parallel with or on the upstream
side of the cooling unit to avoid condensation in the heating ele-
ment. With a parallel flow arrangement, the dampers or other
meansusedtocontroltheflowofairmustbeadequatetoprevent
chilled air from entering the furnace and, if manually operated,
must be equipped with means to prevent operation of either unit
unless the damper is in the full heat or cool position.
When the furnace is installed without a cooling coil, it is recom-
mended that a removable access panel be provided in the outlet
air duct. This opening shall be accessible when the furnace is
installedandshallbeofsuchasizethattheheatexchanger can be
viewed for visual light inspection or such that a sampling probe
canbeinsertedintotheairstream.Theaccesspanelmustbemade
to prevent air leaks when the furnace is in operation.
NOTE: In a horizontal installation the air conditioning coil must
be adequately supported by proper brackets and supports.
Inadequatecoil supportcan resultin furnace cabinet distortion
and air leakage.
When the furnace is heating, the temperature of the return air
enteringthefurnacemustbebetween55°Fand100°F.
When a furnace is installed so that supply ducts carry air circu-
lated by the furnace to areas outside the space containing the
furnace, the return air shall also be handled by a duct sealed to
the furnace casing and terminating outside the space containing
thefurnace.
FILTERS -READ THIS SECTION BEFORE INSTALLING THE RETURN AIR
DUCTWORK
Filters must be used with this furnace. Discuss filter maintenance
with the building owner. Filters do not ship with this furnace, but
must be providedby the installer. Filters must comply with UL900
or CAN/ULCS111 standards. Damage or repairs due to failure to
install filters in the furnace are not covered under the warranty.
NOTE: An undersized opening will cause reduced airflow.
UPRIGHTINSTALLATIONS
Dependingontheinstallationand/orcustomerpreference,differ-
ing filter arrangements can be applied. Filters can be installed in
the central return register or a side panel external filter rack kit
(upflows),ortheductworkaboveadownflowfurnace. Asanalter-
native, a media air filter or electronic air cleaner can be used as
the primary filter.
CIRCULATIONAIR FILTERS
One of the most common causes of a problem in a forced air
heating system is a blocked or dirty filter. Circulating air filters
must be inspected monthly for dirt accumulation and replaced if
necessary. Failure to maintain clean filters can cause premature
heat exchanger failure.
Anewhomemayrequiremorefrequentreplacementuntilallcon-
struction dust and dirt is removed. Circulating air filters are to be
installed in the return air duct external to the furnace cabinet.
Upflow / Horizontal
Models Minimum Recommended Filter Size^
*0403A* 1 - 16 X 25 Sideor 1 - 14 X24 BottomReturn
*0603A* 1 - 16 X 25 Sideor 1 - 14 X24 BottomReturn
*0604B* 1 - 16 X 25 Sideor BottomReturn
*0803B* 1 - 16 X 25 Sideor BottomReturn
*0804B* 1 - 16 X 25 Sideor BottomReturn
*0805C* 1 -16 X 25Sideor BottomReturn¹
*0805D* 2 - 16 X25 Sideor 1 - 20 X 25 BottomReturn
*1005C* 2 - 16 X25 Sideor 1 - 20 X 25 BottomReturn
*1205D* 2 - 16 X25 Sideor 1 - 24 X 24 BottomReturn
*1405D* 2 - 16 X25 Sideor 1 - 24 X 24 BottomReturn
Downflow Models Minimum Recommended Filter Size^
*0403A* 2 -10 X 20or 1 -14 X25 TopReturn
*0603A* 2 -10 X 20or 1 -14 X25 TopReturn
*0804B* 2 -14 X 20or 1 -16 X25 TopReturn
*1005C* 2 -14 X 20or 1 -20 X25 TopReturn
^Othersize filters of equal orgreaterdimensions maybe used, filters may
also be centrallylocated
¹ = use 2 - 16 X 25 filters and two side returns or 20 X 25 filter on bottom
return if furnace is connected to a cooling unitover4tons nominal capacity