Maytag Amana MVM97 Series User manual

5151 San Felipe Suite 500
Houston, TX 77056
www.goodmanmfg.com • www.amana-hac.com
©2014-2018 Goodman Manufacturing Company, L.P.
I NSTALLATION I NSTRUCTIONS FOR
*MVM97 & *CVM97
M
ODULATING G AS F URNACE
IOG-2007G
02/2018
(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 ..................................... 4
SHIPPING INSPECTION ......................................... 5
ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS .............. 5
TOTHE INSTALLER ........................................... 6
PRODUCT DESCRIPTION ....................................... 6
FEATURES ................................................... 6
PRODUCT APPLICATION ....................................... 7
LOCATION REQUIREMENTS & CONSIDERATINOS .................. 8
CLEARANCES AND ACCESSIBILITY ............................... 9
EXISTING FURNACE REMOVAL ................................ 10
THERMOSTAT LOCATION .................................... 10
COMBUSTION & VENTILATION AIR REQUIREMENTS ............ 10
INSTALLATION POSITIONS .................................... 14
HORIZONTAL APPLICATIONS & CONSIDERATIONS ............... 14
FURNACE SUSPENSION ....................................... 14
FRONT COVER PRESSURE SWITCH TUBE LOCATION ............ 14
DRAIN TRAP AND LINES ..................................... 14
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 .................. 15
DUAL CERTIFICATION: NON-DIRECT/DIRECT VENT............ 16
MATERIALS AND JOINING METHODS ........................... 16
PROPER VENT/FLUE AND COMBUSTION AIR PIPING PRACTICES .16
TERMINATION LOCATIONS .................................... 17
SPECIAL VENTING REQUIREMENTS
FOR INSTALLATIONS INCANADA .......................... 17
STANDARD FURNACE CONNECTIONS .......................... 19
COMBUSTION AIR PIPE ..................................... 19
VENT/INTAKE TERMINATIONS
FOR INSTALLATION OF MULTIPLE DIRECT VENT FURNACES .. 22
CONCENTRIC VENT TERMINATION ............................ 23
SIDE WALL VENT KIT ...................................... 23
CONDENSATE DRAIN LINES & DRAIN TRAP ................... 23
GENERAL DRAIN INFORMATION .............................. 23
FIELD SUPPLIED DRAIN ..................................... 23

2
TABLE OF CONTENTS
HEATING OPERATION WITH CTK01 THERMOSTAT
(COMMUNICATING) ...................................... 40
HEATING OPERATION WITH CTK02**, CTK03** & CTK04**
THERMOSTAT (MODULATING COMMUNICATING) ................ 40
CONDENSATE DRAIN TRAP PRIMING .......................... 40
FURNACE OPERATION ....................................... 40
GAS SUPPLY PRESSURE MEASUREMENT ........................ 41
GAS MANIFOLD PRESSURE MEASUREMENT ..................... 42
GAS INPUT RATE MEASUREMENT (NATURAL GAS ONLY) ....... 43
TEMPERATURE RISE ......................................... 43
CIRCULATOR BLOWER SPEEDS ................................ 44
BLOWER HEAT OFF DELAY TIMINGS .......................... 45
COMFORTNET™ SYSTEM .................................... 45
OVERVIEW ................................................. 45
AIRFLOW CONSIDERATIONS ................................... 46
FOSSIL FUEL APPLICATIONS .................................. 46
CTK0* WIRING .......................................... 46
COMFORTNET™ SYSTEM ADVANCED FEATURES ................. 47
DIP SWITCHES ............................................. 48
NETWORK TROUBLESHOOTING ................................ 49
SYSTEM TROUBLESHOOTING .................................. 50
FAULT RECALL SEQUENCE ................................... 50
FAULT CLEAR SEQUENCE: ................................... 50
NORMAL SEQUENCE OF OPERATION ........................... 50
POWER UP................................................ 50
HEATING MODE ............................................ 50
COOLING MODE ............................................ 51
FAN ONLY MODE ........................................... 51
OPERATIONAL CHECKS ...................................... 51
SAFETY CIRCUIT DESCRIPTION ............................... 51
FURNACE CONTROL BOARD .................................. 52
PRIMARY LIMIT ............................................. 52
AUXILIARY LIMIT ........................................... 52
ROLLOUT LIMIT ............................................ 52
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
T HE MANUFACTURER 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 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
UPFLOW MODEL INSTALLED HORIZONTALLY
WITH LEFT SIDE DOWN - ALTERNATE ..................... 26
COUNTERFLOW MODEL INSTALLED VERTICALLY ................. 26
DRAIN EXITING LEFT SIDE .................................. 26
DRAIN EXITING RIGHT SIDE ................................. 27
COUNTERFLOW MODEL INSTALLED HORIZONTALLY
WITH RIGHT SIDE DOWN ................................ 27
COUNTERFLOW MODEL INSTALLED HORIZONTALLY
WITH LEFT SIDE DOWN .................................. 28
ELECTRICAL CONNECTIONS ................................... 28
WIRING HARNESS .......................................... 28
115 VOLT LINE CONNECTIONS .............................. 28
JUNCTION BOX RELOCATION ................................. 29
24 VOLT THERMOSTAT WIRING ............................. 29
SINGLE-STAGE HEATING THERMOSTAT APPLICATION ............ 30
24 VOLT DEHUMIDISTAT WIRING ............................ 30
FOSSIL FUEL APPLICATIONS .................................. 31
LINE VOLTAGE ACCESSORIES
(ELECTRONIC AIR CLEANER AND HUMIDIFIER).............. 31
24 VOLT HUMIDIFIER ...................................... 31
GAS SUPPLY AND PIPING .................................... 31
HIGH ALTITUDE DERATE ..................................... 32
PROPANE GAS CONVERSION ................................. 32
GAS PIPING CONNECTIONS .................................. 33
PROPANE GAS TANKS AND PIPING ............................ 35
CIRCULATING AIR & FILTERS ................................ 36
DUCT WORK - AIR FLOW ................................... 36
CHECKING DUCT STATIC ..................................... 36
BOTTOM RETURN AIR OPENING [UPFLOW MODELS] ........... 36
FILTERS - READ THIS SECTION
BEFORE INSTALLING THE RETURN AIR DUCT WORK .......... 37
UPRIGHT INSTALLATIONS ..................................... 38
HORIZONTAL INSTALLATIONS ................................. 39
STARTUP PROCEDURE & ADJUSTMENT ........................ 39

3
TABLE OF CONTENTS
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 ................... 54
CONDENSATE TRAP AND DRAIN SYSTEM
(QUALIFIED SERVICER ONLY) ............................. 54
FLAME SENSOR (QUALIFIED SERVICER ONLY) ................. 55
BEFORE LEAVING AN INSTALLATION ............................ 55
REPAIR AND REPLACEMENT PARTS ............................ 55
TROUBLESHOOTING CODES ............................... 56-60
STATUS CODES ............................................. 61
WIRING DIAGRAM .......................................... 62
SPECIAL INSTRUCTIONS FOR PRODUCTS INSTALLED
IN THE STATE OF MASSACHUSETTS ........................ 63

4
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 OPERATIONALCHECKS
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 ANDBURST 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.

5
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
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
SHIPPINGINSPECTION
All units are securely packed in shipping containers tested
according to International Safe Transit Association specifica-
tions. The carton must be checked upon arrival for external
damage. 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 dam-
age and bolts or screws which may have come loose in tran-
sit. 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.
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 DE CARBONE
Le monoxyde de
des carbone peut causerdes maladies gravestelles que dommages permanents au cerveau et meme la mort.
Cette ventilation est nécessaire pour éviter le danger d'intoxication
au CO pouvant survenir si un appareil produisant du monoxyde
de carbone continue de fonctionner au sein de la zone confinée.
• 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 deal-
ers for transportation damage.
ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS
NOTE: Discharge your body’s static electricity before touch-
ing unit. An electrostatic discharge can adversely affect elec-
trical components.
Use the following precautions during furnace installation and
servicing to protect the integrated control module from dam-
age. By putting the furnace, the control, and the person at
the same electrostatic potential, these steps will help avoid
exposing the integrated control module to electrostatic dis-
charge. 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
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.

6
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 ad-
hered to, including but not limited to: unit maximum external
static pressure, gas pressures, BTU input rating, proper elec-
trical connections, circulating air temperature rise, minimum
or maximum CFM, and motor speed connections.
T O PREVENT PROPERTY DAMAGE , PERSONAL INJURY OR DEATH DUE TO
FIRE , DO NOT INSTALL THIS FURNACE IN A MOBILE HOME , TRAILER , OR
RECREATIONAL VEHICLE .
WARNING
P RODUCT D ESCRIPTION
FEATURES
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 advanced airflow configuration,
enhanced setup features, 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 thermo-
stat and a non-ComfortNet compatible single stage air condi-
tioning 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 nega-
tive pressure created by the draft inducer. The furnace
control board receives commands from the room ther-
mostat. 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 fre-
quency 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 MODEL
Figure 1
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

7
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).
Gas furnaces manufactured on or after May 1, 2017 are not
permitted to be used in Canada for heating of buildings or
structures under construction.
In the U.S.A. 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.
• Damage or repairs due to failure to comply with
these requirements is not covered under the
warranty.
1 Gas Valve
2 Gas Line Entrance (Alternate)
3 Pressure Switch(es)
4 Gas Manifold
5 Combustion Air Intake Connection
6 Hot Surface Igniter
7 Rollout Limit
8 Burners
9 Flame Sensor
10 Flue Sensor
11 Flue Pipe
12 Primary Limit
13 Gas Line Entrance
14 Flue Pipe Connection (Alternate) NK
15 Rubber Elbow
16 Variable-Speed Induced Draft Blower
17 Electrical Connection Inlets (Alternate)
18 Coil Front Cover Pressure Tap
19 Coil Font Cover Drain Port
20 Drian Line Penetrations
21 Drain Trap
22 Blower Door Interlock Switch
23 Inductor (Not All Models)
24 Integrated Control Module
25 24 Volt Thermostat Connections
26 Transformer (40 VA)
27 ECM Variable Speed Circulator Blower
28 Auxiliary Limit
29 Junction Box
30 Electrical Connection Inlets
31 Coil Front Cover
32 “H” Fitting
P RODUCT A PPLICATION
This furnace is primarily designed for residential home-heat-
ing 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 com-
mercial applications:
Schools, Office buildings, Churches, Retail stores,
Nursing homes, Hotels/motels, Common or office areas
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.

8
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 instal-
lation and operation instructions, all local building codes
and ordinances. In their absence, follow the latest edi-
tion of the National Fuel Gas Code (NFPA 54/ANSI Z223.1),
and/or CAN/CSA B149. 1-15 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
25 West 43rd Street, 4th Floor
New York, NY 10036
National Fire Protection Association
1 Batterymarch Park
Quincy, MA 02169-7471
CSA International
8501 East Pleasant Valley
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 B149.1-15 Installation Codes can
also be obtained from:
CSA International
178 Rexdale Boulevard
Etobicoke, Ontario, Canada M9W 1R3
L OCATION R EQUIREMENTS & C ONSIDERATINOS
Follow the instructions listed below and the guidelines
provided inthe CombustionandVentilationAirRequirements
section when selecting a furnace location.
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
• 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.
• 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

9
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
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.
•CounterflowInstallation overa 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
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)
NOTES:
• For servicing or cleaning, a 24” front clearance is required.
• Unit connections (electrical, flue and drain) may necessitate
greater clearances than the minimum clearances listed above.
• In all cases, accessibility clearance must take precedence over
clearances from the enclosure where accessibility clearances are
greater.
POSITION* SIDES REAR FRONT BOTTOM FLUE TOP
Counterflow 0" 0" 3" NC 0" 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 be used for installations on combustible flooring.
*CVM97* MINIMUM CLEARANCES TO COMBUSTIBLE MATERIALS
(INCHES)
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.

10
Installations must adhere to the clearances to combustible ma-
terials to which this furnace has been design certified. The
minimum clearance information for this furnace is provided on
the unit’s clearance label. These clearances must be perma-
nently maintained. Clearances must also accommodate an
installation’s gas, electrical, and drain trap and drain line con-
nections.
NOTE: In addition to the required clearances to combustible
materials, a minimum of 24 inches service clearance must be
available in front of the unit.
TOP
BOTTOM
SIDE SIDE SIDE
TOP
BOTTOM
Upflow Counterflow Horizontal
Figure 3
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 hori-
zontal pitch, as required by the National Fuel Gas Code,
ANSI Z223.1 or the Natural Gas and Propane Installa-
tion Code, CSA B149.1-15 and these instructions. De-
termine that there is no blockage or restriction, leak-
age, corrosion and other deficiencies which could cause
an unsafe condition.
3. As far as practical, close all building doors and win-
dows and all doors between the space in which the
appliance(s) connected to the venting system are lo-
cated and other spaces of the building.
4. 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 be-
ing inspected in operation. Adjust thermostat so appli-
ance shall operate continuously.
7. Test for spillage from draft hood appliances at the draft
hood relief opening after 5 minutes of main burner op-
eration. 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 accor-
dance with the National Fuel Gas Code ANSI Z223.1/
NFPA 54 and/or National Gas and Propane Installation
Code CSA B149.1-15.
9. After it has been determined that each appliance con-
nected to the venting system properly vents when
tested as outlined above, return doors, windows, ex-
haust fans, fireplace dampers and any other gas burn-
ing 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 B149.1-15 Installation Codes.
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
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
Improved construction and additional insulation in buildings
have reduced heat loss by reducing air infiltration and es-
cape around doors and windows. These changes have helped
in reducing heating/cooling costs but have created a prob-
lem supplying combustion and ventilation air for gas fired
and other fuel burning appliances. Appliances that pull air