Goodman xMVM97 Series User manual

5151 San Felipe Suite 500
Houston, TX 77056
www.goodmanmfg.com • www.amana-hac.com
©2014 - 2015 Goodman Manufacturing Company, L.P.
I NSTALLATION I NSTRUCTIONS FOR
*MVM97 & *CVM97
M
ODULATING G AS F URNACE
IOG-2007B
05/15
(Type FSP CATEGORY IV Direct
or Non Direct Vent Air Furnace)
These furnaces comply with requirements em-
bodied in the American National Standard / Na-
tional Standard of Canada ANSI Z21.47·CSA-2.3
Gas Fired Central Furnaces.
Installer:
Affix all manuals
adjacent to the unit.
As a professional installer you have an obligation to know
the product better than the customer. This includes all
safety precautions and related items.
Prior to actual installation, thoroughly familiarize yourself
with this Instruction Manual. Pay special attention to all
safety warnings. Often during installation or repair it is
possible to place yourself in a position which is more
hazardous than when the unit is in operation.
Remember, it is your responsibility to install the product
safely and to know it well enough to be able to instruct a
customer in its safe use.
Safety is a matter of common sense...a matter of thinking
before acting. Most dealers have a list of specific good
safety practices...follow them.
The precautions listed in this Installation Manual are
intended as supplemental to existing practices. However,
if there is a direct conflict between existing practices
and the content of this manual, the precautions listed
here take precedence.
RECOGNIZE THIS SYMBOL
AS A SAFETY PRECAUTION.
*NOTE: Please contact your distributor or our website for
the applicable Specification Sheet referred to in this manual.
TABLE OF CONTENTS
is a registered trademark of Maytag Corporation or its related companies and is used under license. All rights reserved.
SAFETY CONSIDERATIONS ..................................... 3
SHIPPING INSPECTION ........................................ 4
ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS ............... 4
TOTHE INSTALLER ......................................... 5
PRODUCT DESCRIPTION .....................................5
FEATURES .................................................. 5
PRODUCT APPLICATION ...................................... 6
LOCATION REQUIREMENTS & CONSIDERATINOS .......... 7
CLEARANCES AND A CCESSIBILITY ............................... 8
EXISTING FURNACE REMOVAL ................................. 9
THERMOSTAT LOCATION .................................... 10
COMBUSTION & VENTILATION AIR REQUIREMENTS ..... 10
INSTALLATION POSITIONS ................................. 14
HORIZONTAL APPLICATIONS & CONSIDERATIONS ...... 14
FURNACE SUSPENSION ..................................... 14
FRONT COVER PRESSURE SWITCH T UBE LOCATION ........... 15
DRAIN TRAP AND LINES ................................... 15
LEVELING ................................................ 15
ALTERNATE ELECTRICAL AND GAS LINE CONNECTIONS ......... 15
DRAIN PAN .............................................. 15
FREEZE PROTECTION ...................................... 15
PROPANE GAS/HIGH ALTITUDE INSTALLATIONS ........ 15
VENT/FLUE PIPE & COMBUSTION AIR PIPE .............. 16
DUAL CERTIFICATION: NON-DIRECT/DIRECT VENT ............ 16
MATERIALS AND JOINING METHODS ......................... 16
PROPER VENT/FLUE
AND COMBUSTION A IR PIPING PRACTICES .................. 17
TERMINATION LOCATIONS ................................... 17
SPECIAL VENTING REQUIREMENTS
FOR INSTALLATIONS INCANADA .......................... 19
STANDARD FURNACE CONNECTIONS ......................... 19
COMBUSTION A IR PIPE .................................... 19
VENT/INTAKE TERMINATIONS FOR INSTALLATION
OF MULTIPLE DIRECT VENT FURNACES .................... 23
CONCENTRIC VENT T ERMINATION ........................... 23
SIDE WALL VENT KIT .................................... 23
CONDENSATE DRAIN LINES & DRAIN TRAP .............. 23
GENERAL DRAIN INFORMATION ............................. 23
FIELD SUPPLIED DRAIN .................................... 24
UPFLOW MODEL INSTALLED VERTICALLY ..................... 24
DRAIN EXITING RIGHT SIDE ................................ 24
DRAIN EXITING LEFT SIDE ................................. 24
UPFLOW MODEL INSTALLED HORIZONTALLY
WITH RIGHT SIDE DOWN ............................... 25
UPFLOW MODEL INSTALLED HORIZONTALLY
WITH LEFT SIDE DOWN ................................ 25

2
TABLE OF CONTENTS
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
UPFLOW MODEL INSTALLED HORIZONTALLY
WITH LEFT SIDE DOWN - ALTERNATE ................... 26
COUNTERFLOW MODEL INSTALLED VERTICALLY ....................... 26
DRAIN EXITING LEFT SIDE ......................................... 26
DRAIN EXITING RIGHT SIDE ........................................ 26
COUNTERFLOW MODEL INSTALLED HORIZONTALLY
WITH RIGHT SIDE DOWN ............................... 27
COUNTERFLOW MODEL INSTALLED HORIZONTALLY
WITH LEFT SIDE DOWN ................................ 27
ELECTRICAL CONNECTIONS ............................... 28
WIRING HARNESS ......................................... 28
115 VOLT LINE CONNECTIONS ............................. 28
JUNCTION BOX RELOCATION ................................ 28
24 VOLT THERMOSTAT WIRING ............................ 29
SINGLE-STAG E HEATING THERMOSTAT A PPLICATION ........... 30
24 VOLT DEHUMIDISTAT WIRING ........................... 30
FOSSIL FUEL A PPLICATIONS ................................. 31
LINE VOLTAGE A CCESSORIES
(ELECTRONIC A IR CLEANER AND HUMIDIFIER) ............. 31
24 VOLT HUMIDIFIER ..................................... 31
GAS SUPPLY AND PIPING .................................... 32
HIGH A LTITUDE DERATE ................................... 32
PROPANE GAS CONVERSION ................................ 32
GAS PIPING CONNECTIONS ................................. 32
PROPANE GAS TANKS AND PIPING .......................... 35
CIRCULATING AIR & FILTERS .............................. 36
DUCT WORK - AIR FLOW .................................. 36
CHECKING DUCT STATIC ................................... 36
BOTTOM RETURN A IR OPENING [UPFLOW MODELS] .......... 37
FILTERS - READ THIS SECTION BEFORE
INSTALLING T HE RETURN A IR DUCT WORK ................ 37
UPRIGHT INSTALLATIONS ................................... 39
HORIZONTAL INSTALLATIONS ................................ 39
STARTUP PROCEDURE & ADJUSTMENT ................... 39
HEATING OPERATION WITH CTK01 THERMOSTAT
(COMMUNICATING) ..................................... 40
HEATING OPERATION WITH CTK02**, CTK03** & CTK04**
THERMOSTAT (MODULATING COMMUNICATING) .................... 40
CONDENSATE DRAIN TRAP PRIMING ......................... 41
FURNACE OPERATION ...................................... 41
FURNACE STARUP ......................................... 41
FURNACE SHUTDOWN ..................................... 41
GAS SUPPLY PRESSURE MEASUREMENT ...................... 42
GAS MANIFOLD PRESSURE MEASUREMENT ................... 42
GAS INPUT RATE MEASUREMENT (NATURAL GAS ONLY) ...... 43
TEMPERATURE RISE ....................................... 44
CIRCULATOR BLOWER SPEEDS .............................. 44
BLOWER HEAT OFF DELAY TIMINGS ........................ 46
COMFORTNET™ SYSTEM .................................... 46
OVERVIEW ............................................... 46
DIP SWITCHES ............................................... 47
AIRFLOW CONSIDERATIONS ................................. 48
FOSSIL FUEL A PPLICATIONS ................................. 48
CTK0* WIRING ......................................... 49
COMFORTNET™ SYSTEM A DVANCED FEATURES ............... 49
NETWORK TROUBLESHOOTING ............................... 50
SYSTEM TROUBLESHOOTING ................................ 50
FAULT RECALL SEQUENCE ................................. 50
FAULT CLEAR SEQUENCE: ................................. 51
NORMAL SEQUENCE OF OPERATION ...................... 51
POWER UP.............................................. 51
HEATING MODE .......................................... 51
COOLING MODE .......................................... 51
FAN ONLY MODE ........................................ 52
OPERATIONAL CHECKS ..................................... 52
SAFETY CIRCUIT DESCRIPTION ............................ 52
FURNACE CONTROL BOARD ................................ 52
PRIMARY LIMIT ........................................... 52
AUXILIARY LIMIT .......................................... 52
ROLLOUT LIMIT .......................................... 53
PRESSURE SWITCHES ...................................... 53
FLAME SENSOR ........................................... 53
TROUBLESHOOTING ........................................ 53
ELECTROSTATIC DISCHARGE (ESD)
PRECAUTIONS .......................................... 53
DIAGNOSTIC CHART ....................................... 53
RESETTING FROM LOCKOUT ................................ 53
MAINTENANCE ............................................... 54
ANNUAL INSPECTION ...................................... 54
FILTERS .................................................. 54
BURNERS ................................................ 54
INDUCED DRAFT AND CIRCULATOR BLOWERS ................. 55
CONDENSATE TRAP AND DRAIN SYSTEM
(QUALIFIED SERVICER ONLY) ........................... 55
FLAME SENSOR (QUALIFIED SERVICER ONLY) ................ 55
BEFORE LEAVING AN INSTALLATION ...................... 55
REPAIR AND REPLACEMENT PARTS ........................ 55
TROUBLESHOOTING CODES ............................... 56
WIRING DIAGRAM ........................................... 62
SPECIAL INSTRUCTIONS FOR PRODUCTS INSTALLED
IN THE STATE OF MASSACHUSETTS ........................... 63

3
SAFETY CONSIDERATIONS
Adhere to the following warnings and cautions when install-
ing, adjusting, altering, servicing, or operating the 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 field converted to operate on L.P. gas by using the
appropriate L.P. conversion kit listed in the PROPANE GAS/
HIGHALTITUDE INSTALLATIONS section of this manual
Install this furnace only in a location and position as speci-
fied in LOCATION REQUIREMENTS & CONSIDERATIONS sec-
tion and INSTALLATION POSITIONS section of this manual.
Provide adequate combustion and ventilation air to the fur-
nace as specified in COMBUSTION & VENTILATION AIR RE-
QUIREMENTS section of this manual.
Combustion products must be discharged to the outdoors.
Connect this furnace to an approved vent system only, as
specified in VENT/FLUE PIPE & COMBUSTIONAIR PIPE sec-
tion of this manual.
Never test for gas leaks with an open flame. Use a commer-
cially available soap solution made specifically for the detec-
tion 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 in-
tended temperature-rise range with a duct system which has
external static pressure within the allowable range, as speci-
fied on the furnace rating plate and OPERATIONAL CHECKS
section of these instructions.
When a furnace is installed so that supply ducts carry air
circulated by the furnace to areas outside the space contain-
ing the furnace, the return air shall also be handled by duct(s)
sealed to the furnace casing and terminating outside the
space containing the furnace.
A gas-fired furnace for installation in a residential garage
must be installed as specified in the LOCATION REQUIRE-
MENTSAND CONSIDERATIONS section of this manual.
This furnace may be used as a construction site heater only
if certain conditions are met. These conditions are listed in
the PRODUCTAPPLICATION section of this manual.
FROZEN AND BURST WATER PIPE HAZARD
F
AILURE TO PROTECT AGAINST THE RISK OF FREEZING MAY RESULT IN
PROPERTY DAMAGE .
S
PECIAL PRECAUTIONS MUST BE MADE IF INSTALLING FURNACE IN AN
AREA WHICH MAY DROP BELOW FREEZING . T HIS CAN CAUSE IMPROPER
OPERATION OR DAMAGE TO EQUIPMENT . I F THE FURNACE
ENVIRONMENT HAS THE POTENTIAL OF FREEZING , THE DRAIN TRAP AND
DRAIN LINE MUST BE PROTECTED . T HE USE OF ACCESSORY DRAIN TRAP
HEATERS , ELECTRIC HEAT TAPE AND / OR RV ANTIFREEZE IS
RECOMMENDED FOR THESE INSTALLATIONS .
CAUTION
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
Drain trap must be primed at time of installation. Trap is
internally partitioned; add water to both inlet ports until wa-
ter appears at both sides of the outlet opening. Failure to
prime trap at time of installation may have a negative ef-
fect on combustion quality and pressure switch action.

4
B10259-216
CO can cause serious illness including permanent brain
damageordeath.
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 MONOXYDEDECARBONE
Le monoxyde de
des carbonepeutcauser des maladies graves tellesque dommages permanents au cerveau et meme la mort.
Cette ventilation est nécessaire pour éviterle danger d'intoxication
au CO pouvant survenir si un appareil produisant du monoxyde
de carbone continue de fonctionner au sein de la zone confinée.
P OSSIBLE PROPERTY DAMAGE , PERSONAL INJURY OR DEATH DUE TO
FIRE , EXPLOSION , SMOKE , SOOT , CONDENSATION , ELECTRICAL SHOCK
OR CARBON MONOXIDE MAY RESULT FROM IMPROPER INSTALLATION ,
REPAIR OPERATION , OR MAINTENANCE OF THIS PRODUCT .
WARNING
SHIPPINGINSPECTION
All units are securely packed in shipping containers tested according 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 event
of damage the consignee should:
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. File the claim with the following support documents within a nine month statute of limitations.
• Original or certified copy of the Bill of Lading, or indemnity bond.
• 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 to carrier.
The carrier is responsible for making prompt inspection of damage and for a thorough investigation of each claim. The distributor or
manufacturer will not accept claims from dealers for transportation damage.
ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS
NOTE: Discharge your body’s static electricity before touching unit. An electrostatic discharge can adversely affect electrical
components.
Use the following precautions during furnace installation and servicing to protect the integrated control module from damage. By
putting the furnace, the control, and the person at the same electrostatic 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.
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

5
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 charge to 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 move or shuffle your feet, do not touch ungrounded objects, 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 controls to their containers before touching any ungrounded 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 connections,
circulating air temperature rise, minimum or maximum CFM, and
motor speed connections.
P RODUCT D ESCRIPTION
FEATURES
This furnace is a part of the ComfortNet™ family of products. The CTK family of thermostat kits allow this furnace to be installed as
part of a digitally communicating system. The ComfortNet system provides automatic airflow configuration, enhanced setup fea-
tures, and enhanced diagnostics. It also reduces the number of thermostat wires to a maximum of four. It may be also installed as part
of a non-communicating system using a standard 24 VAC thermostat.
This product may be installed with the ComfortNet thermostat and a non-ComfortNet compatible single stage air conditioning unit.
However, this reduces the benefits of the ComfortNet system as the enhancements will only apply to the furnace.
The modulating furnace operation is based off of negative pressure created by the draft inducer. The furnace control board
receives commands from the room thermostat. The furnace control board then controls the RPM of the (3 phase) inducer by
varying the frequency and voltage to the inducer. This is known as variable frequency drive (VFD). The inducer, pressure
switches, and gas valve are linked by pneumatic tubing. The gas valve modulates based on this negative pressure.
5
9
4
3
12
16
28
32
11
14 15
3017
18
2
19
21 27
24
25
20
23
26
20
2213
30
29
31
16
77
888
Both Sides
10
UPFLOW/HORIZONTAL
Figure 1
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
2
5
6
9
10
11
3
12
13
16 18
19
20
23
25
26
27
21
20
31
32
77
88 88 88 4
2
17
15
1
COUNTERFLOW/HORIZONTAL
Figure 2

6
1 Gas Valve 17 Electrical Connection Inlets (Alternate)
2 Gas Line Entrance (Alternate) 18 Coil Front Cover Pressure Tap
3 Pressure Switch(es) 19 Coil Front Cover Drain Port
4 Gas Manifold 20 Drain Line Penetrations
5 Combustion Air Intake Connection 21 Drain Trap
6 Hot Surface Igniter 22 Blower Door Interlock Switch
7 Rollout Limit 23 Inductor (Not All Models)
8 Burners 24 Integrated Control Module
(with fuse and diagnostic LED)
9 Flame Sensor 25 24 Volt Thermostat Connections
10 Flue Pipe Connection 26 Transformer (40 VA)
11 Flue Pipe 27 ECM Variable Speed Circulator Blower
12 Primary Limit 28 Auxiliary Limit
13 Gas Line Entrance 29 Junction Box
14 Flue Pipe Connection (Alternate) NK 30 Electrical Connection Inlets
15 Rubber Elbow 31 Coil Front Cover
16 Variable-Speed Induced Draft Blower 32 "H" Fitting
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 commercial applications:
Schools,Officebuildings,Churches,Retailstores,
Nursinghomes,Hotels/motels,Commonorofficeareas
In such applications, the furnace must be installed with the following 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.
• It must be part of a ducted system and not used in a free air delivery application.
• It must not be used as a “make-up” air unit.
This product is dual certified. Dual certification means that the combustion air inlet pipe is OPTIONAL and the furnace can be
vented as a:
Non-direct vent (single pipe) central forced air furnace in which combustion air is taken from the installation area or from air
ducted from the outside or,
Direct vent (dual pipe) central forced air furnace in which all combustion air supplied directly to the furnace burners through
a special air intake system outlined in these instructions.
• All other warranty exclusions and restrictions apply This furnace is an ETL dual-certified appliance and is appropriate for use
with natural or propane gas (NOTE: If using propane, a propane conversion kit is required).
This furnace may be used as a construction site heater ONLY if all of 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 jumpers that provide continuous heating CANNOT be used
and can cause long term equipment damage. Bi-metal thermostats, or any thermostat affected by vibration must
not be used during construction.
• Return air ducts are provided and sealed to the furnace.
• A return air temperature range between 60ºF (16ºC) and 80ºF (27ºC) is maintained.
• Air filters are installed in the system and replaced daily during construction and upon completion of construction.
• The input rate and temperature rise are set per the furnace rating plate.
• The furnace must be installed as a two pipe system, using 100% outside air for combustion during construction.
• 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.

7
• Damage or repairs due to failure to comply with these requirements is not covered under 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.
• If the unit is to be installed in an attic, the passageway to and the service area around the unit must have flooring.
To ensure proper furnace operation, install, operate and maintain the furnace in accordance with these installation
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 water
codes, and other applicable codes.
A copy of the National Fuel Gas Code (NFPA 54/ANSI Z223.1) can be obtained from any of the following:
American National Standards Institute NationalFire ProtectionAssociation CSA International
25 West 43rd Street, 4th Floor 1 Batterymarch Park 8501 East Pleasant Valley
New York, NY 10036 Quincy, MA 02169-7471 Independence, 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 accordance with “ASHRAE Guide” or “Manual J-Load Calculations” published by
the Air Conditioning Contractors of America.
A copy of the CAN/CSA B149.1 Installation Codes can also be obtained from:
CSAInternational
178 Rexdale Boulevard
Etobicoke, Ontario, Canada M9W 1R3
L OCATION R EQUIREMENTS & C ONSIDERATINOS
Followtheinstructionslistedbelowandthe guidelinesprovidedinthe CombustionandVentilationAirRequirementssectionwhen
selectinga furnace location.
• Centrally locate the furnace with respect to the proposed
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.
• Provide provisions for venting combustion products
outdoors through a proper venting system. Special
consideration should be given to vent/flue pipe routing
and combustion air intake pipe when applicable. Refer
to Vent/Flue Pipe and Combustion Air Pipe -Termination
Locations for appropriate termination locations and to
determine if the piping system from furnace to
termination can be accomplished within the guidelines
given. NOTE: The length of flue and/or combustion air piping can be a limiting factor in the location of the
furnace.
• Locate the furnace so condensate flows downwards to the drain. Do not locate the furnace or its condensate
drainage system in any area subject to below freezing temperatures without proper freeze protection. Refer to
Condensate Drain Lines and Trap for further details.
• Ensure adequate combustion air is available for the furnace. Improper or insufficient combustion air can expose
building occupants to gas combustion products that could include carbon monoxide. Refer to Combustion and
Ventilation Air Requirements.
• Set the furnace on a level floor to enable proper condensate drainage. If the floor becomes wet or damp at times,
place the furnace above the floor on a concrete base sized approximately 1-1/2" larger than the base of the
furnace. Refer to the Horizontal Applications and Considerations for leveling of horizontal furnaces.
T O PREVENT POSSIBLE EQUIPMENT DAMAGE , PROPERTY DAMAGE ,
PERSONAL INJURY OR DEATH , THE FOLLOWING BULLET POINTS MUST BE
OBSERVED WHEN INSTALLING THIS UNIT .
WARNING
P OSSIBLE PROPERTY DAMAGE , PERSONAL INJURY OR DEATH DUE TO
FIRE , EXPLOSION , SMOKE , SOOT , CONDENSATION , ELECTRICAL SHOCK
OR CARBON MONOXIDE MAY RESULT FROM IMPROPER INSTALLATION ,
REPAIR OPERATION , OR MAINTENANCE OF THIS PRODUCT .
WARNING

8
• Ensure upflow or horizontal furnaces are not installed directly on carpeting, or any other combustible material. The
only combustible material allowed is wood.
• A special accessory subbase must be used for upright counterflow unit installations over any combustible material
(including wood). Refer to subbase instructions for installation details. (NOTE:A subbase will not be required if an
air conditioning coil is located beneath the furnace between the supply air opening and the combustible floor.
• Exposure to contaminated combustion air will result in safety and performance-related problems. Do not install the
furnace where the combustion air is exposed to the following substances:
permanent wave solutions 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
• Isolate a non-direct furnace from an area contaminated by any of the above substances. This protects the non-
direct vent furnace from airborne contaminants. To ensure that the enclosed non-direct vent furnace has an
adequate supply of combustion air, air must be ducted in from a nearby uncontaminated room or from outdoors.
Refer to the Combustion and Ventilation Air Requirements for details.
• If the furnace is used in connection with a cooling unit, install the furnace upstream or in parallel with the cooling
coil. Premature heat exchanger failure will result if the cooling coil is placed upstream of the furnace.
For vertical (upflow or downflow) applications, the minimum cooling coil width shall not be less than furnace width
minus 1”. Additionally, a coil installed 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.
For upflow applications, the front of the coil and furnace must face the same direction.
• 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 damage by vehicles.
• If the furnace is installed horizontally, ensure the access doors are not on the “up/top” or “down/bottom” side of
the furnace.
• Do not connect this furnace to a chimney flue that serves a separate appliance designed to burn solid fuel.
• On Counterflow Installations, the air conditioning coil must be downstream on the supply (positive) side of the
furnace heat exchanger.
•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 silicone rubber caulking compound or cement grout.
•Counterflow Installation over a combustible floor. If installation over a combustible floor becomes necessary, use
an accessory subbase (see Specification Sheet applicable for your model for details.) A special accessory subbase
must be used for upright counterflow unit installations over any combustible material including wood. Refer to
subbase instructions for installation details. Follow the instructions with the subbase for proper installation. 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.)
CLEARANCES AND ACCESSIBILITY
NOTES:
• For servicing or cleaning, a 24” front clearance is required.
• Unit connections (electrical, flue and drain) may necessitate
greater clearances than the minimum clearances listed above.
• In all cases, accessibility clearance must take precedence over
clearances from the enclosure where accessibility clearances are
greater.
POSITION* FRONT SIDES REAR TOP FLUE FLOOR
Upflow 3" 0" 0" 1" 0" C
Horizontal Alc ove 6" 0" 4" 0" C
C = If placed on combustible floor, floor MUST be wood only.
*MVM97* MINIMUM CLEARANCES TO COMBUSTIBLE MATERIALS
(INCHES)

9
NOTES:
• For servicing or cleaning, a 24” front clearance is required.
• Unit connections (electrical, flue and drain) may necessitate
greater clearances than the minimum clearances listed above.
• In all cases, accessibility clearance must take precedence over
clearances from the enclosure where accessibility clearances are
greater.
Installations must adhere to the clearances to combustible materials
to which this furnace has been design certified. The minimum clear-
ance information for this furnace is provided on the unit’s clearance
label. These clearances must be permanently maintained. Clear-
ances must also accommodate an installation’s gas, electrical, and
drain trap and drain line connections.
NOTE: In addition to the required clearances to combustible materi-
als, a minimum of 24 inches service clearance must be available in
front of the unit.
EXISTING FURNACE REMOVAL
NOTE: When an existing furnace is removed from a venting system serving other appliances, the venting system may be too large to
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 Z21.4, CSA-2.3 latest edition Section 1.23.1.
The following steps shall be followed with each appliance connected to the venting system placed in operation, while any
other appliances connected to the venting system are not in operation:
1. Seal any unused openings in the venting system;
2. Inspect the venting system for proper size and horizontal pitch, as required by the National Fuel Gas Code, ANSI Z223.1
or the Natural Gas and Propane Installation Code, CSA B149.1-05 and these instructions. Determine that there is no
blockage or restriction, leakage, corrosion and other deficiencies which could cause an unsafe condition.
3. As far as practical, close all building doors and windows and all doors between the space in which the appliance(s)
connected to the venting system are located and other spaces of the building.
4. Close fireplace dampers.
5. 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.
6. Follow the lighting instructions. Place the appliance being inspected in operation. Adjust thermostat so appliance shall
operate continuously.
7. Test for spillage from draft hood appliances at the draft hood relief opening after 5 minutes of main burner operation.
Use the flame of a match or candle.
8. If improper venting is observed during any of the above tests, the venting system must be corrected in accordance with
the National Fuel Gas Code ANSI Z223.1/NFPA 54 and/or National Gas and Propane Installation Code CSA B149.1-05.
9. After it has been determined that each appliance connected to the venting system properly vents when tested as outlined
above, return doors, windows, exhaust fans, fireplace dampers and any other gas burning appliance to their previous
conditions of use.
If resizing is required on any portion of the venting system, use the appropriate table in Appendix G in the latest edition of the
National Fuel Gas Code ANSI Z223.1 and/or CSA B149.1-05 Installation Codes.
POSITION* SIDES REAR FRONT BOTTOM FLUE TOP
Counterflow0"0"3"NC0"1"
Horizontal 6" 0" 3" C 0" 6"
C = If placed on combustible floor, floor MUST be wood only.
NC = For installation on non-combustible floors only. A combustible subbase
must
b
e use
d
f
or
i
nsta
ll
at
i
ons on com
b
ust
ibl
e
fl
oor
i
ng.
*CVM97* MINIMUM CLEARANCES TO COMBUSTIBLE MATERIALS
(INCHES)
TOP
BOTTOM
SIDE SIDE SIDE
TOP
BOTTOM
Upflow Counterflow Horizontal
Figure 3

10
THERMOSTAT LOCATION
The thermostat should be placed approximately five feet from the floor on a vibration-free, inside wall in an area having good air
circulation. 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.
Consult the instructions packaged with the thermostat for mounting instructions and further precautions.
C OMBUSTION & V ENTILATION A IR R EQUIREMENTS
Improved construction and additional insulation in buildings have
reduced heat loss by reducing air infiltration and escape around
doors and windows. These changes have helped in reducing heat-
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 of air.
House depressurization can cause back drafting or improper combustion of gas-fired appliances, thereby exposing building occu-
pants to gas combustion products that could include carbon monoxide.
When the furnace is installed as a direct vent (2-pipe system) furnace, no special provisions for air for combustion are
required. However, 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 the other 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 provisions of the local building codes for
determining the combustion air requirements for the appliances.
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.
The following information on air for combustion and ventilation is reproduced from the NationalFuel Gas CodeNFPA54/ANSIZ223.1
Section9.3.
9.3* Air for Combustion and Ventilation.
9.3.1 General.
9.3.1.1 Air for combustion, ventilation, and dilution of flue gases for appliances installed in buildings shall be obtained by application of one of the
methods covered in 9.3.2 through 9.3.6. Where the requirements of 9.3.2 are not met, outdoor air shall be introduced in accordance with methods covered
in 9.3.3 through 9.3.6.
Exception No. 1: This provision shall not apply to direct vent appliances.
9.3.1.2 Appliances of other than natural draft design and other than Category 1 vented appliances shall be provided with combustion, ventilation, and
dilution air in accordance with the appliance manufacturer’s instructions.
9.3.1.3 Appliances shall be located so as not to interfere with proper circulation of combustion, ventilation, and dilution air.
9.3.1.4 Where used, a draft hood or a barometric draft regulator shall be installed in the same room or enclosure as the appliance served so as to prevent
any difference in pressure between the hood or regulator and the combustion air supply.
9.3.1.5 Makeup air requirements for the operation of exhaust fans, kitchen ventilation systems, clothes dryers, and fireplaces shall be considered in
determining the adequacy of a space to provide combustion air requirements.
9.3.2 Indoor Combustion Air. The required volume of indoor air shall be determined in accordance with the method in 9.3.2.1 or 9.3.2.2 except that
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