Amana M9S96 Series User manual

1



(Type FSP CATEGORY IV Direct
or Non Direct Vent Air Furnace)
(Type FSP CATÉGORIE IV Direct




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 specic 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 conict between existing practices and
the content of this manual, the precautions listed here take
precedence.




IOG-2029
07/2021
*NOTE: Please contact your distributor or our website

this manual.
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.
19001 Kermier Rd., Waller, TX 77484
www.goodmanmfg.com • www.amana-hac.com
©
90% HEX
DO NOT LIFT
PRODUCT USING
HEAT EXCHANGER
O NLY PERSONNEL THAT HAVE BEEN TRAINED TO INSTALL , ADJUST ,
SERVICE OR
REPAIR ( HEREINAFTER , “ SERVICE ”) THE EQUIPMENT SPECIFIED IN THIS MANUAL
SHOULD
SERVICE
THE EQUIPMENT
. T HE
MANUFACTURER
WILL NOT
BE
RESPONSIBLE
FOR ANY INJURY
OR
PROPERTY DAMAGE
ARISING FROM IMPROPER
SERVICE OR
SERVICE PROCEDURES . I F YOU SERVICE
THIS UNIT , YOU ASSUME RESPONSIBILITY
FOR ANY INJURY
OR PROPERTY DAMAGE
WHICH
MAY RESULT . I N
ADDITION , IN
JURISDICTIONS
THAT REQUIRE ONE OR MORE LICENSES TO SERVICE THE EQUIPMENT
SPECIFIED IN THIS MANUAL , ONLY LICENSED PERSONNEL SHOULD SERVICE THE
EQUIPMENT . I MPROPER INSTALLATION
, ADJUSTMENT , SERVICING OR REPAIR OF
THE EQUIPMENT SPECIFIED IN THIS MANUAL , OR
ATTEMPTING TO
INSTALL , ADJUST ,
SERVICE OR REPAIR THE EQUIPMENT SPECIFIED IN THIS MANUAL WITHOUT PROPER
TRAINING MAY RESULT IN PRODUCT DAMAGE , PROPERTY DAMAGE , PERSONAL
INJURY OR DEATH .

2
TABLE OF CONTENTS
 ................................................4
 .....................................................6
.............6
 ..........................................................6
 .....................................................7
 ...............8
 ..................................9
.........................................9
 ................................................ 11
................ 11
 .............................................. 11
.......... 11
................................................. 11
.... 11
 ...............................................12
......................................................................12

 ..............................................................12
....................................................................12
....................................................12
 ...........................13
................13
 ....................13
......................................................14
 ..................................................................14
 ..............................................15
 .........................15
 .............................16
..........16
 ......................................................17

 .19

 ...............................19
 ................................19
....................................................20
 ....................20
 .....................................20
 .................................................21
 ......................21
 ..........................................21
.............................................21

..................................................................21

....................................................................22

 ..............................................22
...........23
.............................................23
 ..........................................23

........................................................24

..........................................................24
.............................................25
..........................................................25
.......................................25

 .............26
..........................26
 ..........................................27
........................................27
............................................27
 ......................................................................28
 .................................................28
.......................................28
 .........................................28
 ....................................................................29
 ...........................................29
 .....................................................31
................................31
 .........................................31
................................................31
................................................32
 ....32

 ..............................................33
..................................................33
 .........................................34
............................35
 ........................................................35
 ...................................................35
 .....................................................35
........................................................35
...........................35
 ...............................35
 ................36
.................36
 ..............................36
....................................................37
 ......................37
 ....................................................37

 .................................................................37

....................................................38
 ......................................................38
....................................................39

3
 .......................................39
....................................39
..............................................................39
............................................................39
 .............................................................39
....................................................39
 .............................................................39
 .................................................................39
 .....................................................39
............................................................................39
 ...................................................39
 ...........................................................39
..............................40

.......................................................................40
.........................................................................40
...............40

 ...........................................................40
..............40
.............40
................................40
.................................40
..............................................40
 ........................................................41
 ...........................................45
 ...........................................49
 ...........................................
............................................................

.............................................
......................................................
TABLE OF CONTENTS

4
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 .

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 .

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:
�
�
�
�

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 .

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 .


Adhere to the following warnings and cautions when
installing, adjusting, altering, servicing, or operating the
furnace. To ensure proper installation and operation,
thoroughly read this manual for specics pertaining to the
installation and application of this product.
This furnace is manufactured for use with natural gas. It
may be eld converted to operate on L.P. gas by using the
appropriate L.P. conversion kit listed in the 
section of this
manual
Install this furnace only in a location and position
as specied in 
 section and 
 section of this manual.
Provide adequate combustion and ventilation air to the
furnace as specied in 
 section of this manual.
Combustion products must be discharged to the outdoors.
Connect this furnace to an approved vent system only, as
specied in 
section of this manual.
Never test for gas leaks with an open ame. Use a
commercially available soap solution made specically
for the detection of leaks to check all connections, as
specied in  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
specied on the furnace rating plate and 
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
containing 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-red furnace for installation in a residential
garage must be installed as specied in the 
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 section of this
manual.

5
Drain trap must be primed at time of installation. Trap is
internally partitioned; add water to both inlet ports until
water appears at both sides of the outlet opening. Failure
to prime trap at time of installation may have a negative
e󰀨ect on combustion quality and pressure switch action.

FIRE OR EXPLOSION HAZARD
Failure to follow the safety warnings exactly could result
in serious injury, death or property damage.
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. A fire or explosion may result causing
property damage, personal injury or loss of life.
Advertencia especial para la instalación de calentadores ó manejadoras
de aire en áreas cerradas como estacionamientos ó cuartos de servicio.
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.
RISQUE D'EMPOISONNEMENT AU MONOXYDE DE CARBONE
Le monoxyde de
des
carbone peut causer des maladies graves telles 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.
CO can cause serious illness including permanent brain
damage or death.

6

RISQUE D'INCENDIE OU D'EXPLOSION
Si les consignes de sécurité ne sont pas suivies à la lettre,
cela peut entraîner la mort, de graves blessures ou des
dommages matériels.
Ne jamais vérifier la présence de fuites de gaz au moyen
d'une flamme nue. Vérifier tous les raccords en utilisant
une solution savonneuse commerciale conçue
spécialement pour la détection de fuites. Un incendie ou
une explosion risque de se produire, ce qui peut entraîner
la mort, des blessures ou des dommages matériels.

All units are securely packed in shipping containers
tested according to International Safe Transit Association
specications. 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 notied as
soon as possible - preferably within ve days.
4. File the claim with the following support documents
within a nine month statute of limitations.
• Original or certied copy of the Bill of Lading, or
indemnity bond.
• Original paid freight bill or indemnity in lieu thereof.
• Original or certied 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.


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 .

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 .




󰀨
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 integrated 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
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 shu󰀪e 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.

Before installing this unit, please read this manual
thoroughly to familiarize yourself with specic items which
must be adhered to, including but not limited to: unit
maximum external static pressure, gas pressures, BTU
input rating, proper electrical connections, circulating air
temperature rise, minimum or maximum CFM, and motor
speed connections.

7

This furnace is primarily designed for residential home-heating
applications. It is NOT designed or certied for use in
mobile homes, trailers or recreational vehicles. Neither is it
designed or certied 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, O󰀩ce buildings, Churches, Retail stores, Nursing
homes, Hotels/motels, Common or o󰀩ce 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.
• It must be installed as a two-pipe systems for
combustion air.
• All other warranty exclusions and restrictions apply
This furnace is an ETL dual-certied appliance and
is appropriate for use with natural or propane gas
(NOTE: If using propane, a propane conversion kit is
required).
Dual certication 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.
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 .

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. Bimetal thermostats, or any
thermostat a󰀨ected 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.
• MERV 11 pleated minimum 4.0” thick (Example P/N
• AMP-11-2025-45) air lter(s) are installed in the
system and inspected daily and replaced as
needed 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 lters and evaporator coils are thoroughly
cleaned following nal construction clean up by a
qualied person.
• All furnace operating conditions (including ignition,
input rate, temperature rise and venting) are veried
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 are not covered under the warranty.
NOTE: The Commonwealth of Massachusetts requires

be met:
• Gas furnaces must be installed by a licensed plumber
or gas tter.
• 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 ooring.
To ensure proper furnace operation, install, operate and
maintain the furnace in accordance with these installation

ordinances. In their absence, follow the latest edition 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:

23 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 441311
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.

8
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


Follow the instructions listed below and the guidelines provided
in the 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
.

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 .

•
• 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/ue pipe routing
and combustion air intake pipe when applicable.
Refer to 
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 ue and/
or combustion air piping can be a limiting factor in the
location of the furnace.
• Locate the furnace so condensate ows 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.
• Ensure adequate combustion air is available for the
furnace. Improper or insu󰀩cient combustion air
can expose building occupants to gas combustion
products that could include carbon monoxide. Refer
to 
• Set the furnace on a level oor to enable proper
condensate drainage. If the oor becomes wet or
damp at times, place the furnace above the oor on
a concrete base sized approximately 1-1/2” larger
than the base of the furnace. Refer to the 
 for leveling of
horizontal furnaces.
• Ensure upow or horizontal furnaces are not installed
directly on carpeting, or any other combustible
material. The only combustible material allowed is
wood.
• A special accessory sub-base must be used for
upright counterow unit installations over any
combustible material (including wood). Refer to sub-
base instructions for installation details. (NOTE:A
sub-base will not be required if an air conditioning coil
is located beneath the furnace between the supply air
opening and the combustible oor.
• 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
carbon tetrachloride
water softening chemicals
swimming pool chemicals
deicing salts or chemicals
halogen type refrigerants
printing inks
cleaning solutions (such as perchloroethylene)
paint removers
varnishes
hydrochloric acid
cements and glues
antistatic fabric softeners for clothes dryers
masonry acid washing materials
• Enclose a  furnace if it is installed near
an area frequently contaminated by any of the above
substances. This protects the  furnace
from airborne contaminants. To ensure that the
enclosed   furnace has an adequate
supply of combustion air, provide air from a nearby
uncontaminated room or from outdoors. Refer to
the  for
details.
• If the furnace is used in connection with a cooling coil
unit, install the furnace upstream or in parallel with the
cooling coil unit. Premature heat exchanger failure will
result if the cooling unit is placed ahead of the furnace.
• For vertical (upow or downow) applications, the
minimum cooling coil width shall not be less than
furnace width minus 1”. Additionally, a coil installed
above an upow furnace or under a counterow
furnace may be the same width as the furnace or may
be one size larger than the furnace. 

• For upow 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 oor. 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.

9
• Do not connect this furnace to a chimney ue that
serves a separate appliance designed to burn solid
fuel.
• On Counterow Installations, the air conditioning coil
must be downstream on the supply (positive) side of
the furnace heat exchanger.
 
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 oor by using a silicone rubber
caulking compound or cement grout.
 
If installation over a combustible oor becomes
necessary, use an accessory sub-base (see
Specication Sheet applicable for your model for
details.) A special accessory sub-base must be used
for upright counterow unit installations over any
combustible material including wood. Refer to sub-
base instructions for installation details. Follow the
instructions with the sub-base for proper installation.
Do not install the furnace directly on carpeting, tile, or
other combustible material other than wood ooring.
(NOTE: The sub-base will not be required if an air
conditioning coil is installed between the supply air
opening on the furnace and the oor.)
Position* Sides Rear Front Bottom Flue Top
Upflow 0" 0" 3" C0" 1"
Horizontal 6" 0" 3" C0" 6"
*M9S96* & *M9S92* Minimum Clearances To Combustible Materials (Inches)
C = If placed on combustible floor, floor MUST be wood only.
Position* Sides Rear Front Bottom Flue Top
Counterflow 0" 0" 3" NC 0" 1"
Horizontal 6" 0" 3" C0" 6"
*C9S96* Minimum Clearances To Combustible Materials (Inches)
C = If placed on combustible floor, floor MUST be wood only.
NC = For installations on non-combustible floors only. A combustible subbase must be
used for installations on combustible flooring.
TOP
BOTTOM
SIDE SIDE SIDE
TOP
BOTTOM
Upflow Counterflow Horizontal


NOTES:
• For servicing or cleaning, a 24” front clearance is
required.
• Unit connections (electrical, ue and drain) may
necessitate greater clearances than the minimum
clearances listed above.
• Clearance in accordance with local installation
codes, the requirements of the gas supplier and the
manufacturer’s installation instructions.
• Dégaugement conforme aux codes d’installation
locaux, aux exigences du fournisseur de gaz et aux
instructions d’installation du fabricant.
• 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 certied.
The minimum clearance information for this furnace is
provided on the unit’s clearance label. These clearances
must be permanently maintained. Clearances must
also accommodate an installation’s gas, electrical, and
drain trap and drain line connections. If the alternate
combustion air intake or vent/ue connections are used
additional clearance must be provided to accommodate
these connections. Refer to 
 for details.

combustible materials, a minimum of 24 inches
service clearance must be available in front of the unit.
A furnace installed in a conned space (i.e., a closet or utility
room) must have two ventilation openings with a total minimum
free area of 0.25 square inches per 1,000 BTU/hr of furnace
input rating. Refer to Specication Sheet applicable to your
model for minimum clearances to combustible surfaces. One
of the ventilation openings must be within 12 inches of the top;
the other opening must be within 12 inches of the bottom of
the conned space. In a typical construction, the clearance
between the door and door frame is usually adequate to
satisfy this ventilation requirement.





The following vent testing procedure is reproduced from
the American National Standard/National Standard



10
CARBON MONOXIDE POISONING HAZARD
Failure to follow the steps outlined below for each
appliance connected to the venting system being placed
into operation could result in carbon monoxide poisoning
or death.
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 B149.1-15 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.
Donot operatea 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 B149.1-15.
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.

RISQUE D'INTOXICATION AU MONOXYDE DE CARBONE
Si les étapes décrites ci-dessous ne sont pas suivies pour
chacun des appareils raccordés au système de ventilation
au moment de sa mise en marche, cela peut entraîner une
intoxication au monoxyde de carbone ou la mort. Les
étapes suivantes doivent être suivies pour chacun des
appareils raccordés au système de ventilation au moment
de sa mise en marche, alors que tous les autres appareils
raccordés au système de ventilation ne sont pas en
marche :
1) Sceller toutes les ouvertures inutilisées du système de
ventilation.
2) Inspecter le système de ventilation afin de vérifier si la
taille et l'inclinaison par rapport à l'horizontale sont
conformes aux exigences du National Fuel Gas Code, ANSI
Z223.1/NFPA 54 ou du Code d'installation du gaz naturel
et du propane, CSA B149.1 et à ces instructions. Vérifier
qu'il n'y a pas d'obstruction ou de restriction, de fuite, de
corrosion et d'autres problèmes qui pourraient entraîner
une situation dangereuse.
3) Si possible, fermer toutes les portes et fenêtres du
bâtiment ainsi que toutes les portes séparant l'endroit où
se trouvent les appareils raccordés au système de
ventilation et les autres zones du bâtiment.
4) Fermer le registre des foyers.
5) Mettre les sécheuses en marche ainsi que tous les
autres appareils qui ne sont pas raccordés au système de
ventilation. Mettre en marche tous les ventilateurs de
tirage, comme celui des hottes de cuisine et des salles de
bains, et les régler à la puissance maximale. Ne pas mettre
en marche les ventilateurs d'été.
6) Suivre les instructions d'allumage. Mettre en marche
l'appareil soumis à l'inspection. Régler le thermostat de
manière à ce que l'appareil fonctionne en continu.
7) Vérifier la présence de fuite au niveau de l'ouverture du
coupe-tirage des appareils qui en sont dotés après 5
minutes de fonctionnement du brûleur principal. Utiliser
la flamme d'une allumette ou d'une bougie.
8) Si un problème de ventilation est observé pendant l'un
des essais décrits ci-dessus, des correctifs doivent être
apportés au système de ventilation conformément au
National Fuel Gas Code, ANSI Z223.1/NFPA 54 et (ou) au
Code d'installation du gaz naturel et du propane, CSA
B149.1.
9) Une fois qu'il a été déterminé que chaque appareil
raccordé au système de ventilation fonctionne
correctement au moyen des essais décrits ci-dessus, les
portes, les fenêtres, les ventilateurs, les registres de foyer
et tous les autres appareils de combustion alimentés au
gaz doivent être remis dans leur état initial.


11

The thermostat should be placed approximately ve feet
from the oor on a vibration-free, inside wall in an area
having good air circulation. Do not install the thermostat
where it may be inuenced 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 xtures or other appliances.
• Radiant heat from a replace.
• 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.

Improved construction and additional insulation in buildings
have reduced heat loss by reducing air inltration and escape
around doors and windows. These changes have helped in
reducing heating/cooling costs but have created a problem
supplying combustion and ventilation air for gas red and
other fuel burning appliances. Appliances that pull air out
of the house (clothes dryers, exhaust fans, replaces, etc.)
increase the problem by starving appliances for air.
House depressurization can cause back drafting or improper
combustion of gas-red appliances, thereby exposing
building occupants to gas combustion products that could
include carbon monoxide.
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 B1491-
15 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.

This furnace may be installed in an upright position or
horizontal on either the left or right side panel. Do not
install this furnace on its back. For  furnaces,
return air ductwork may be attached to the side panel(s)
and/or basepan. For  furnaces, return
air ductwork must be attached to the basepan. For
both  furnaces, return
ductwork must be attached to the basepan (top end of
the blower compartment). NOTE: Ductwork must never
be attached to the back of the furnace. Contact your
distributor for proper airow requirements and number of
required ductwork connections. Refer to “Recommended
Installation Positions” gure for appropriate installation
positions, ductwork connections, and resulting airow
arrangements.


2" 2" 3/8" ANGLE IRON
(3 PLACES )
X X

When installing a furnace horizontally, additional consideration
must be given to the following:

If suspending the furnace from rafters or joists, use 3/8”
threaded rod and 2”x2”x1/8” angle iron as shown in the
following diagram. The length of rod will depend on the
application and the clearances necessary.
If the furnace is installed in a crawl space it must be
suspended from the oor joist or supported by a concrete
pad. Never install the furnace on the ground or allow it to
be exposed to water.

When a furnace is installed horizontally with left side down,
the front cover pressure switch tube must be re-located to
the lower port of the collector box cover.
1. Remove tube from front cover pressure switch and
collector box cover.
2. Remove rubber plug from bottom collector box port
and install on top collector box port.

12
3. Locate 24” x 1/4” tube in bag assembly.
4. Install one end on front cover pressure switch.
5. Route tube to lower port on collector box cover and
cut o󰀨 excess tubing.

In horizontal applications the condensate drain trap is
secured to the furnace side panel, suspending it below the
furnace. A minimum clearance of 5.5” below the furnace
must be provided for the drain trap. Additionally, the
appropriate downward piping slope must be maintained
from the drain trap to the drain location. Refer to
Condensate Drain Trap and Lines for further details. If the
drain trap and drain line will be exposed to temperatures
near or below freezing, adequate measures must be taken
to prevent condensate from freezing.

Leveling ensures proper condensate drainage from the
heat exchanger. For proper ue pipe drainage, the furnace
must be level lengthwise from end to end. The furnace
should have a slight tilt from back to front with the access
doors downhill from the back panel approximately 1/2
to 3/4 inches. The slight tilt allows the heat exchanger
condensate, generated in the recuperator coil, to ow
forward to the recuperator coil front cover.





This furnace has provisions allowing for electrical and gas
line connections through either side panel. In horizontal
applications the connections can be made either through
the “top” or “bottom” of the furnace.

A drain pan must be provided if the furnace is installed
above a conditioned area. The drain pan must cover the
entire area under the furnace (and air conditioning coil if
applicable).

If the drain line is routed through an area which may see
temperatures near or below freezing, precautions must be
taken to prevent condensate from freezing within the drain
line.

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 .
High
Stage
Low
Stage
Natural None
#45 3.5" w.c. 1.9" w.c. None
Propane
LPM-07*
1
1.25mm 10.0" w.c. 6.0" w.c. None
Gas
Altitude
Kit
Orifice
Manifold Pressure
Pressure
Switch
Change
0-7000
1
LPM-07* supports both Honeywell and White-Rodgers 1-stage valves
NOTE: In Canada, gas furnaces are only certified to 4500 feet.

13

U PON
COMPLETION OF THE FURNACE INSTALLATION
, CAREFULLY
INSPECT THE ENTIRE FLUE SYSTEM BOTH INSIDE AND OUTSIDE OF THE
FURNACE TO ASSURE IT IS PROPERLY SEALED . L EAKS IN THE FLUE
SYSTEM CAN RESULT IN SERIOUS PERSONAL INJURY OR DEATH DUE TO
EXPOSURE TO FLUE PRODUCTS , INCLUDING CARBON MONOXIDE .

F AILURE TO FOLLOW THESE INSTRUCTIONS CAN RESULT IN BODILY
INJURY OR DEATH . C AREFULLY READ AND FOLLOW ALL INSTRUCTIONS
GIVEN IN THIS SECTION .

This manual will refer to the pipe that discharges products
of combustion to the outdoors as the “vent” pipe or
“ue” pipe. The pipe that supplies air for combustion
to the furnace will be referred to as the “intake” pipe or
“combustion air” pipe.
This furnace is dual certied and may be installed as a
non-direct vent (single pipe) or direct vent (dual pipe)
appliance.


PVC, CPVC, or ABS pipe & ttings are typically used as
venting and intake pipe materials. All 90° elbows must
be medium or long radius types. A medium radius elbow
should measure ~3-1/16” minimum from the plane of
one opening to the center line of the other opening for 2”
diameter pipe, and ~4-9/16” minimum for 3” pipe.
In addition to these materials, Innoue® by Centrotherm
Eco Systems and PolyPro® by M&G Duravent are
also approved vent and combustion air materials for
installations in the U.S.A. Manufacturers Installation
instructions for these products must be followed. These
products have specic instructions for installing, joining
and terminating. Do not mix materials or components of
one manufacturer with materials or components of another
manufacturer. Refer to the following chart for plastic pipe &
ttings specications.

All installations in Canada must conform to the
requirements of CAN/CSA B149.1-15 code. All vent
components, including primer and cement, must be listed
to ULC S636. The certied pipe and ttings should be
clearly marked with the ULC standard “S636”. The primer
and cement used must be of the same manufacturer as
the vent system. For Royal Pipe System 636; use GVS-
65 Primer (Purple) and GVS-65 PVC Solvent Cement.
For IPEX System 636, use PVC/CPVC Primer, Purple
or clear. Use PVC Solvent cement (Gray). For Canadian
installations, ABS may be used as a combustion air pipe
only. ABS is not an approved vent material in Canada.
If ABS is used as a combustion air pipe, it must be CSA
certied. Always follow the manufacturer’s instructions
in the use of primer and cement. Do not use primer and
cement around potential sources of ignition. Do not use
primer or cement beyond its expiration date.
PVC ASTM STANDARD
SCHEDULE 40 PIPE D1785
SCHEDULE 40 CELLULAR CORE PIPE F891
SDR 21 OR 26 PIPE D2241
FITTINGS D2466
ABS
SCHEDULE 40 PIPE D1527
SCHEDULE 40 CELLULAR CORE PIPE F628
FITTINGS D2468
CPVC
SCHEDULE 40 PIPE F441
SDR 21 OR 26 PIPE F442
FITTINGS F438
POLYPROPYLENE
INNOFLUE® (CENTROTHERM)
POLYPRO® (DURAVENT)
PRIMER & SOLVENT CEMENT
PVC PRIMER F656
CPVC PRIMER F656
PVC SOLVENT CEMENT D2564
CPVC SOLVENT CEMENT F493
ABS SOLVENT CEMENT D2235
ABS / PVC / CPVC ALL PURPOSE CEMENT (FOR
PIPE & FITTINGS OF THE SAME MATERIAL)
D2564, D2235, F493
TRANSITION CEMENT FOR ABS TO PVC or CPVC D3188
INSTALLATIONS IN CANADA
PVC & CPVC PIPE & FITTINGS
PVC & CPVC SOLVENT CEMENT
TRANSITION CEMENT
INNOFLUE® (CENTROTHERM)
POLYPRO® (DURAVENT)

ULC S636

14

This furnace is manufactured with 2” CPVC vent & intake
couplings. Use transition cement to connect PVC or ABS
pipe to these ttings. For furnaces requiring installation
of 3” pipe, the transition from 2” to 3” should be done as
close to the furnace as possible, and only when the piping
is sloped enough to prevent condensation from collecting.
This furnace must not be connected to Type B, BW, or
L vent or vent connector, and must not be vented into
masonry chimney. A masonry chimney may be used as
a chase or passage way for approved venting materials
providing the masonry chimney is not also being used to
vent products of combustion. Never common vent this
appliance with another appliance. Never use a vent which
is used by a solid fuel appliance.
Piping may run vertically or horizontally and must be
adequately supported to prevent strain on joints, sagging,
separation, and detachment from the furnace. Horizontal
runs of piping must be supported every three to ve
feet. Condensation within the furnace secondary heat
exchanger and in the vent pipe is a normal occurrence.
Vent pipe must be installed to maintain a minimum 1/4
inch per foot downward slope toward the furnace to return
condensate to the furnace’s drain system. Condensation
may also occur in the intake pipe. This commonly takes
place during the summer months when humid air enters
an intake pipe that runs through a cool basement or other
conditioned space. If the combustion air intake pipe is to
be installed above a nished ceiling or other area where
dripping of condensate will be objectionable, insulating
the combustion air pipe may be necessary. Use 1/2” thick
closed cell foam insulation where required. Refer to intake
pipe options for using the RF000142 kit and managing
condensation.
PREFERRED

TRANSITION NO LESS
THAN 45 DEGREES TO
HORIZONTAL PLANE TO
AVOID CREATING A WATER
TRAP IN VENT PIPING.
ACCEPTABLE

NO TRANSITION ON
HORIZONTAL PLANE,
THIS CREATES A
WATER TRAP AND
RESTRICTS FLUE
GASES

Precautions must be taken to prevent condensate from
freezing inside the vent pipe. All vent piping exposed to
freezing temperatures must be insulated with 1/2” thick
closed cell foam. Inspect piping for leaks prior to installing
insulation.
T O AVOID BODILY
INJURY , FIRE OR EXPLOSION , SOLVENT CEMENTS
MUST
BE KEPT
AWAY FROM
ALL IGNITION SOURCES
( I .
E ., SPARKS , OPEN
FLAMES , AND EXCESSIVE HEAT ) AS THEY ARE COMBUSTIBLE LIQUIDS .
A
VOID BREATHING CEMENT VAPORS OR CONTACT WITH SKIN AND / OR
EYES .


Consult tables 4 & 5 to determine what diameter piping is
required for your installation. Lengths shown in the chart
apply to single pipe & two pipe installations. In a two pipe
installation the length shown refers to only one pipe, vent
or intake. Both pipes would normally be equal in length, if
di󰀨erent, then the longest pipe must be within the limits of
table 4. It is preferable to up-size from 2” to 2.5” or 3” pipe
if the pipe length & elbow count are near maximum. This
will help avoid nuisance pressure switch opening caused
by prevailing winds & sudden changes in atmospheric
pressure.

15


 
123457 8
275 70 65 60 55 50 45 40
3114 107 100 93 86 79 72 65
245 40 35 30 25 20 15 10
3168 161 154 147 140 133 126 119
235 30 25 20 15 10 5N/A
3168 161 154 147 140 133 126 119
260 55 50 45 40 35 30 25
3113 106 99 92 85 78 71 64
245 40 35 30 25 20 15 10
3120 113 106 99 92 85 78 71
240 35 30 25 20 15 10 5
3151 144 137 130 123 116 109 102
2N/A N/A N/A N/A N/A N/A N/A N/A
3158 151 144 137 130 123 116 109
2100 95 90 85 80 75 70 65
3137 130 123 116 109 102 95 88
245 40 35 30 25 20 15 10
3168 161 154 147 140 133 126 119
240 35 30 25 20 15 10 5
3120 113 106 99 92 85 78 71
2N/A N/A N/A N/A N/A N/A N/A N/A
3113 106 99 92 85 78 71 64
2N/A N/A N/A N/A N/A N/A N/A N/A
3110 103 96 89 82 75 68 61



combination
 



Number of Elbows















 
123457 8
275 70 65 60 55 50 45 40
3114 107 100 93 86 79 72 65
255 50 45 40 35 30 25 20
3127 120 113 106 99 92 85 78
230 25 20 15 10 5N/A N/A
372 65 58 51 44 37 30 23
230 25 20 15 10 5N/A N/A
372 65 58 51 44 37 30 23
240 35 30 25 20 15 10 5
372 65 58 51 44 37 30 23
260 55 50 45 40 35 30 25
3168 161 154 147 140 133 126 119
230 25 20 15 10 5N/A N/A
3113 106 99 92 85 78 71 64
2N/A N/A N/A N/A N/A N/A N/A N/A
365 58 51 44 37 30 23 16

     
position
   
position
   
position
      
combination
          
  
   
Number of Elbows
*M9S920403AN

*M9S920803BN
*M9S920804CN
*M9S920805CN
*M9S921004CN
*M9S921005CN


1. Maximum allowable limits listed on individual lengths
for inlet and ue and NOT a combination.
2. Minimum requirement for each vent pipe if ve (5)
feet in length and one elbow/tee.
3. Tee used in the vent/ue termination must be
included when determining the number of elbows in
the piping system.
4. 2 ½” or 3” diameter pipe can be used in place of 2”
diameter pipe.
5. Increased Clearance Conguration using (2) 45
deg. Long Sweep elbows should be considered
equivalent to one 90 deg. elbow.
6. One 90° elbow should be secured to the combustion
air intake connection.

The vent pipe outlet is sized to accept 2” pipe. Secure vent
pipe directly into the furnace tting with the appropriate
glue. Alternately, a small section of 2” pipe may be glued
in the furnace socket and a rubber coupling installed to
allow removal for future service. Piping should be routed in
a manner to avoid contact with refrigerant lines, metering
devices, condensate drain lines, etc. If necessary,
clearances may be increased by creating an o󰀨set using
two 45° elbows (Figure 7).
45 DEGREE
ELBOWS



If the furnace is being installed without a combustion air
pipe, a 90° elbow should be used on the combustion air
intake to guard against blockage.
On up ow / horizontal models, secure the combustion
air intake pipe to the air intake coupling using a rubber
coupling supplied with the furnace. The rubber coupling
may be omitted by inverting the intake coupling and gluing
pipe directly to it. Piping may also be glued to the intake
coupling in its original position by using a plastic coupling.
On counterow units secure the combustion air intake
pipe to the air intake coupling using the rubber coupling
and worm gear hose clamps provided with the unit. The
counterow rubber coupling allows service removal of air
intake piping internal to the furnace blower compartment.
The combustion air intake pipe can also be secured
directly to the counterow unit air intake pipe coupling.

16

The RF000142 coupling (Figure 9) can be secured
directly to the furnace intake coupling if condensation/
rain water is a concern. If the RF000142 is used on the
combustion air inlet, it must be installed with the arrow
pointing up. It should be noted, the combustion air will
actually be moving in a direction opposite of the arrow
on the RF000142 coupling. It must have a eld supplied,
trapped drain tube free-draining to a proper condensate
disposal location. A loop in the drain tube can serve as a
trap. The unused RF000142 drain tting must be capped.
A eld supplied tee installed in the intake pipe is also an
acceptable method of catching condensation. It must have
a eld supplied, trapped drain tube or pipe, free-draining to
a proper condensate disposal location. A loop in the drain
tube can serve as a trap.
E DGES OF SHEET METAL HOLES MAY BE SHARP . U SE GLOVES AS A
PRECAUTION WHEN REMOVING
HOLE PLUGS .



When installing a furnace horizontally with the left side
down, alternate ue and combustion air pipe connections
may be used. This method allows the ue and combustion
air piping to be run vertically through the side of the
furnace (facing up in horizontal left). The alternate vent
location is the 3” hole directly in line with the induced draft
blower outlet.
When using the horizontal alternate vent conguration,
you must use the RF000142 vent drain kit. See Figures
8-11 & follow steps below.

means of condensate collection must be provided



Combustion Air
Exhaust


VENT-DRAIN


R 000142F


17

1. Remove the four screws from the vent pipe ange
on top the furnace.
2. Remove the internal elbow, vent pipe & gasket.
3. Cut the internal vent pipe 2 1/2” from the ange.
Discard the un-anged section.
4. Remove the 3” plastic plug (in line with the inducer
outlet) and insert it in the space vacated by removal
of the internal vent pipe.
5. Install the RF000142 drain coupling with arrow
facing up, on the draft inducer outlet.
6. Insert the 2 ½” anged section of pipe with gasket
through the 3” hole and connect to RF000142 drain
coupling. Secure it with gear clamp provided.
7. Use the four self-tapping screws removed in step 1
to secure ange to cabinet.
8. Connect drain hose to the uncapped port on the
RF000142 coupling, refer to page xx, section
entitled “Horizontal Installation with Left Side Down
– Alternate” for drain connection details
When using the alternate venting location, either in
a horizontal left side down installation or a vertical
installation using down – venting, the alternate combustion
air opening can be used. A locating dimple is located on
the right side of the furnace cabinet. The locating dimple is
1-7/8” measured from the front edge of the cabinet in line
with the knock out.
To use the alternate combustion air location:
1. Remove screws and combustion air ange and
gasket from cabinet.
2. Insert the 3” cabinet plug from the drain bag
assembly in the unused combustion air hole.
3. Drill a pilot hole at the cabinet dimple (size dictated
by knockout tool used).
4. Use a knockout tool to create a 3” diameter hole.
5. Secure the combustion air ange & gasket to the
furnace cabinet using the self-tapping screws
removed in step 1.
T HE RUBBER ELBOW IS NOT DESIGNED TO SUPPORT A LOAD . W HEN THE
RUBBER ELBOW IS MOUNTED
EXTERNALLY TO THE FURNACE CABINET ,
EXTREME CARE MUST BE TAKEN TO ADEQUATELY SUPPORT FIELD -
SUPPLIED VENT / FLUE PIPING , AS DAMAGE CAN RESULT IN LEAKS
CAUSING BODILY INJURY OR DEATH DUE TO EXPOSURE TO FLUE GASES ,
INCLUDING CARBON MONOXIDE

B E SURE NOT TO DAMAGE INTERNAL WIRING OR OTHER COMPONENTS
WHEN REINSTALLING COUPLING AND SCREWS .

Vent Pipe
Use alternate vent
& combination
air locations
Combustion Air Pipe
Field Supplied
Drain Tee on Vent Pipe
Condensate trapped
to prevent flue gas from escaping
and routed to field supplied
condensate disposal
1/4” per foot min.
slope to furnace
6’ Max.
Floor
Basement/Crawlspace
DOWN VENTING UPFLOW MODEL FURNACES ONLY
All piping and fittings must be joined per material manufacturers specifications
to prevent separation and flue gas leaks.


Products of combustion must always be vented outside. A
vent pipe must never terminate in an attic, crawl space, or
any other part of a dwelling. Follow the vent pipe & intake
pipe termination requirements listed below as well as all
applicable local, State and National codes.
All terminations (vent and/or intake) must be located at
least 12” above ground level or the anticipated snow level.
All vent terminations (non-direct and direct vent) must
terminate at least 3 feet above any forced air inlet located
within 10 feet.
The vent termination of a non-direct vent application must
terminate at least 4 feet below, 4 feet horizontally from, or
1 foot above any door, window, or gravity air inlet into any
building.

18
The vent termination of a direct vent application must
terminate at least 12” from any opening through which
ue gases may enter a building (door, window, or gravity
air inlet).
The vent termination of vent pipe run vertically through
a roof must terminate at least 12” above the roof line (or
the anticipated snow level) and be at least 12” from any
vertical wall (including any anticipated snow build up).
A vent termination shall not terminate over public
walkways or over an area where condensate or vapor
could create a nuisance or hazard or could be detrimental
to the operation of regulators, relief valves, or other
equipment.
The combustion air intake termination of a direct vent
application should not terminate in an area which is
frequently dusty or dirty.
Vent & combustion air pipes may terminate vertically
through a roof, or horizontally through an outside wall.
The combustion air intake and vent pipe terminations
must be in the same atmospheric pressure zone. Vertical
vent pipe terminations should be as shown in gure 14.
The penetration of pipes through the roof must be sealed
water tight with proper ashing such as is used with a
plastic plumbing vent.
Horizontal vent pipe terminations should be as shown in
the following gures. To secure the pipe passing through
the wall and prohibit damage to piping connections, a
coupling should be installed on either side of the wall and
solvent cemented to a length of pipe connecting the two
couplings. The length of pipe should be the wall thickness
plus the depth of the socket ttings to be installed on the
inside and outside of the wall. The wall penetration should
be sealed with silicone caulking material.

Non-Direct Vent
Vent/Flue Termination
No Terminations
Above Walkway

min.

min.
Non-Direct Vent
Vent/Flue Termination
Direct Vent
Vent/Flue Termination

Forced Air
Inlet
Non-Direct Vent
&
Direct Vent
Vent/Flue Terminations
Grade or Highest
Anticipated
Snow Level








*Not required for


9”MAX.3”MN.
OOFLNE
12” MIN
HEIGHT
DIFFERENCE
12” MIN TO ROOF OR
HIGHEST ANTICIPATED
SNOW LEVEL

STRAIGHT
ELBOWS





19


Center to center = 10” min / 24” max.
Vertical separation: 0” - 24”
Vent termination from wall = 8” min / 12” max.
Combustion air intake from wall = 6” max.
Vent and intake clearance to ground or anticipated snow
level = 12” min.
3” MIN
12” MIN TO GRADE OR HIGHEST
ANTICIPATED SNOW LEVEL
3”MIN
24”MAX
12” MIN SEPA RATION





If more than one direct vent furnace is to be installed
vertically through a common roof top, maintain the same
minimum clearances between the exhaust vent and air
intake terminations of adjacent units as with the exhaust
vent and air intake terminations of a single unit.
If more than one direct vent furnace is to be installed
horizontally through a common side wall, maintain the
clearances as in the Figure 20. Always terminate all
exhaust vent outlets at the same elevation and always
terminate all air intakes at the same elevation.
Vertical Installation
H orizontal Installation



Refer to the directions provided with the Concentric Vent Kit or
IO-619 for installation specications.

ELBOW









ELBOWS







ELBOWS



3”-24” BETWEEN PIPES







20

This kit is to be used with 2” or 3” direct vent systems. The
vent kit must terminate outside the structure and may be
installed with the intake and exhaust pipes located side-
by-side or with one pipe above the other. These kits are
NOT intended for use with single pipe (non-direct vent)
installations. 




A condensing gas furnace achieves its high level
of e󰀩ciency by extracting heat from the products of
combustion to the point where condensation takes place.
The condensate must be collected in the furnace drain trap
and routed to an appropriate drain location in compliance
with local and national codes.
Follow the bullets listed below when installing the drain
system. Refer to the following sections for specic details
concerning furnace drain trap installation and drain hose
hook ups.
• The drain trap supplied with the furnace must be used.
• The drain trap must be primed at time of installation.
• The drain line between furnace and drain location must
meet local and nation codes.
• The drain line between furnace and drain location must
maintain a 1/4 inch per foot downward slope toward the
drain.
• Do not trap the drain line in any other location than at the
drain trap supplied with the furnace.
• If the drain line is routed through an area which may see
temperatures near or below freezing, precautions must
be taken to prevent condensate from freezing within the
drain line.
• If an air conditioning coil is installed with the furnace,
a common drain may be used. An open tee must be
installed in the drain line, near the cooling coil, to relieve
positive air pressure from the coil’s plenum. This is
necessary to prohibit any interference with the function of
the furnace’s drain trap.


there is a trap between the coil and the furnace trap

level of the furnace trap.
#3
#1 #2
#4 #5
#6
#7 #8
#9
#10
#11





purposes only.

All furnace models come with a factory installed drain trap.
For vertical installations, the trap will remain in the factory
position except for a counterow when the installer desires
the drain to exit the right side. All furnace models installed
horizontally require the trap to be relocated. Many drain
hoses have a built–in grommet which will provide a cabinet
seal when installed. See instructions below for your model
and installation position.
NOTE: Both sides of the drain trap must be primed
prior to initial furnace start up
Side Cut-Out
12”
3” Right side shown.
Acceptable
area for
drain hole.
