Sharp R-1514 - 1.5 cu. Ft. Concealed Controls Sensor Instruction manual

INSTALLATION INSTRUCTIONS FOR
*MSS9* & *CSS9*
SINGLE-STAGE GAS FURNACE
(Type FSP CATEGORY IV Direct
or Non Direct Vent Air Furnace)
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.
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.
IOG-2009
08/14
TABLE OF CONTENTS
SAFETY CONSIDERATIONS ........................................... 3
SHIPPING INSPECTION ................................................. 4
ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS ........................ 4
TO THE INSTALLER .................................................. 5
PRODUCT APPLICATION ............................................. 5
LOCATION REQUIREMENTS & CONSIDERATIONS ................ 6
CLEARANCES AND ACCESSIBILITY ....................................... 7
EXISTING FURNACE REMOVAL .......................................... 8
THERMOSTAT LOCATION ............................................... 9
COMBUSTION & VENTILATION AIR REQUIREMENTS ........................ 9
INSTALLATION POSITIONS .......................................... 9
HORIZONTAL APPLICATIONS & CONSIDERATIONS .............. 10
FURNACE SUSPENSION ............................................... 10
FRONT COVER PRESSURE SWITCH TUBE LOCATION ..................... 10
DRAIN TRAP AND LINES ............................................. 10
LEVELING .......................................................... 10
ALTERNATE ELECTRICAL AND GAS LINE CONNECTIONS ................... 10
DRAIN PAN ........................................................ 10
FREEZE PROTECTION ................................................ 10
PROPANE GAS/HIGH ALTITUDE INSTALLATIONS ................ 10
VENT/FLUE PIPE & COMBUSTION AIR PIPE ..................... 11
DUAL CERTIFICATION: NON-DIRECT/DIRECT VENT ..................... 11
MATERIALS AND JOINING METHODS ................................... 11
PROPER VENT/FLUE
AND COMBUSTION AIR PIPING PRACTICES ........................... 12
TERMINATION LOCATIONS ............................................ 12
CANADIAN VENTING REQUIREMENTS ................................... 13
STANDARD FURNACE CONNECTIONS ................................... 13
VENT/INTAKE TERMINATIONS FOR INSTALLATION OF
MULTIPLE DIRECT VENT FURNACES ................................ 17
CONCENTRIC VENT TERMINATION ..................................... 18
SIDE WALL VENT KIT .............................................. 18
CONDENSATE DRAIN LINES & DRAIN TRAP ...................... 18
GENERAL DRAIN INFORMATION ........................................ 19
FIELD SUPPLIED DRAIN .............................................. 19
UPFLOW MODEL INSTALLED VERTICALLY ............................... 20
DRAIN EXITING RIGHT SIDE .......................................... 20
DRAIN EXITING LEFT SIDE ........................................... 20
UPFLOW MODEL INSTALLED HORIZONTALLY
WITH RIGHT SIDE DOWN .......................................... 20
UPFLOW MODEL INSTALLED HORIZONTALLY
WITH LEFT SIDE DOWN ........................................... 21
COUNTERFLOW MODEL INSTALLED VERTICALLY ......................... 21
DRAIN EXITING LEFT SIDE ........................................... 21
DRAIN EXITING RIGHT SIDE .......................................... 22
COUNTERFLOW MODEL INSTALLED HORIZONTALLY
WITH RIGHT SIDE DOWN .......................................... 22
COUNTERFLOW MODEL INSTALLED HORIZONTALLY
WITH LEFT SIDE DOWN ........................................... 22
5151 San Felipe Suite 500
Houston, TX 77056
www.goodmanmfg.com • www.amana-hac.com
© 2014 Goodman Manufacturing Company, L.P.
is a registered trademark of Maytag Corporation or its related companies and is used
under license to Goodman Company, L.P., Houston, TX. All rights reserved.
SAFETY CIRCUIT DESCRIPTION .................................... 36
INTEGRATED CONTROL MODULE ...................................... 36
PRIMARY LIMIT ..................................................... 37
AUXILIARY LIMIT .................................................... 37
ROLLOUT LIMIT .................................................... 37
PRESSURE SWITCHES ................................................ 37
FLAME SENSOR ..................................................... 37
TROUBLESHOOTING ................................................ 37
ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS ....................... 37
DIAGNOSTIC CHART ................................................. 37
RESETTING FROM LOCKOUT .......................................... 38
MAINTENANCE ....................................................... 38
ANNUAL INSPECTION ................................................. 38
FILTERS ........................................................... 38
BURNERS .......................................................... 39
INDUCED DRAFT AND CIRCULATOR BLOWERS ........................... 39
CONDENSATE TRAP AND DRAIN SYSTEM
(QUALIFIED SERVICER ONLY) ..................................... 39
FLAME SENSOR (QUALIFIED SERVICER ONLY) .......................... 39
FLUE PASSAGES (QUALIFIED SERVICER ONLY) ......................... 39
BEFORE LEAVING AN INSTALLATION .............................. 39
REPAIR AND REPLACEMENT PARTS ............................... 40
TROUBLESHOOTING CHART ....................................... 41
AIRFLOW *MSS92*** & *CSS92***A* ............................... 43
AIRFLOW *MSS96*** & *CSS96***A* ................................ 44
WIRING DIAGRAM ................................................... 46
SPECIAL INSTRUCTIONS FOR PRODUCTS INSTALLED
IN THE STATE OF MASSACHUSETTS ........................ 47
ELECTRICAL CONNECTIONS ....................................... 23
WIRING HARNESS ................................................... 23
115 VOLT LINE CONNECTIONS ....................................... 23
JUNCTION BOX RELOCATION .......................................... 24
24 VOLT THERMOSTAT WIRING ...................................... 24
SINGLE-STAGE HEATING THERMOSTAT APPLICATION ...................... 24
FOSSIL FUEL APPLICATIONS ........................................... 25
GAS SUPPLY AND PIPING ............................................ 25
HIGH ALTITUDE DERATE ............................................. 25
PROPANE GAS CONVERSION .......................................... 25
GAS PIPING CONNECTIONS ........................................... 26
PROPANE GAS TANKS AND PIPING .................................... 28
CIRCULATING AIR & FILTERS ....................................... 29
DUCT WORK - AIR FLOW ............................................ 29
CHECKING DUCT STATIC ............................................. 29
BOTTOM RETURN AIR OPENING [UPFLOW MODELS] .................... 30
FILTERS - READ THIS SECTION BEFORE
INSTALLING THE RETURN AIR DUCT WORK .......................... 30
UPRIGHT INSTALLATIONS ............................................. 31
HORIZONTAL INSTALLATIONS .......................................... 32
STARTUP PROCEDURE & ADJUSTMENT .......................... 32
DRAIN TRAP PRIMING ............................................... 32
FURNACE OPERATION ............................................... 32
GAS SUPPLY PRESSURE MEASUREMENT ................................ 32
GAS MANIFOLD PRESSURE MEASUREMENT
AND ADJUSTMENT ................................................ 33
GAS INPUT RATE MEASUREMENT (NATURAL GAS ONLY) ............... 34
TEMPERATURE RISE ................................................. 34
CIRCULATOR BLOWER SPEEDS ........................................ 35
BLOWER HEAT OFF DELAY TIMINGS .................................. 35
NORMAL SEQUENCE OF OPERATION ............................. 35
POWER UP ........................................................ 35
HEATING MODE .................................................... 35
COOLING MODE .................................................... 36
FAN ONLY MODE .................................................. 36
OPERATIONAL CHECKS ............................................. 36
2
WARNING
WARNING
TO PREVENT PERSONAL INJURY OR DEATH DUE TO IMPROPER
INSTALLATION , ADJUSTMENT, ALTERATION, SERVICE OR MAINTENANCE,
REFER TO THIS MANUAL . FOR ADDITIONAL ASSISTANCE OR
INFORMATION , CONSULT A QUALIFIED INSTALLER , SERVICER AGENCY OR
THE GAS SUPPLIER .
GOODMAN WILL NOT BE RESPONSIBLE FOR ANY INJURY OR PROPERTY
DAMAGE ARISING FROM IMPROPER SERVICE OR SERVICE PROCEDURES.
IF YOU INSTALL OR PERFORM SERVICE ON THIS UNIT, YOU ASSUME
RESPONSIBILITY FOR ANY PERSONAL INJURY OR PROPERTY DAMAGE
WHICH MAY RESULT. MANY JURISDICTIONS REQUIRE A LICENSE TO
INSTALL OR SERVICE HEATING AND AIR CONDITIONING EQUIPMENT.
WARNING
SAFETY CONSIDERATIONS
IF THE INFORMATION IN THESE INSTRUCTIONS IS NOT FOLLOWED
EXACTLY, A FIRE OR EXPLOSION MAY RESULT CAUSING PROPERTY
DAMAGE , PERSONAL INJURY OR LOSS OF LIFE.
DO NOT STORE OR USE GASOLINE OR OTHER FLAMMABLE VAPORS AND
LIQUIDS IN THE VICINITY OF THIS OR ANY OTHER APPLIANCE .
WHAT TO DO IF YOU SMELL GAS:
D O NOT TRY TO LIGHT ANY APPLIANCE.
D O NOT TOUCH ANY ELECTRICAL SWITCH; DO NOT USE ANY PHONE
IN YOUR BUILDING .
IMMEDIATELY CALL YOUR GAS SUPPLIER FROM A NEIGHBOR’ S
PHONE. FOLLOW THE GAS SUPPLIER’S INSTRUCTIONS.
IF YOU CANNOT REACH YOUR GAS SUPPLIER, CALL THE FIRE
DEPARTMENT.
INSTALLATION AND SERVICE MUST BE PERFORMED BY A QUALIFIED
INSTALLER, SERVICE AGENCY OR THE GAS SUPPLIER.
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 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/
HIGH ALTITUDE INSTALLATIONS section of this manual
Install this furnace only in a location and position as specified in LOCATION REQUIREMENTS & CONSIDERATIONS section and INSTALLATION POSITIONS section of this manual.
Provide adequate combustion and ventilation air to the furnace as specified in COMBUSTION & VENTILATION AIR REQUIREMENTS section of this manual.
WARNING
THIS PRODUCT CONTAINS OR PRODUCES A CHEMICAL OR CHEMICALS
WHICH MAY CAUSE SERIOUS ILLNESS OR DEATH AND WHICH ARE
KNOWN TO THE STATE OF C ALIFORNIA TO CAUSE CANCER , BIRTH
DEFECTS OR OTHER REPRODUCTIVE HARM .
Combustion products must be discharged to the outdoors.
Connect this furnace to an approved vent system only, as
specified in VENT/FLUE PIPE & COMBUSTION AIR PIPE section of this manual.
WARNING
Never test for gas leaks with an open flame. Use a commercially available soap solution made specifically for the detection of leaks to check all connections, as specified in GAS
SUPPLY AND PIPING section of this manual.
HEATING UNIT SHOULD NOT BE UTILIZED WITHOUT REASONABLE,
ROUTINE, INSPECTION , MAINTENANCE AND SUPERVISION . IF THE
Always install a furnace to operate within the furnace’s intended temperature-rise range with a duct system which has
external static pressure within the allowable range, as specified on the furnace rating plate and OPERATIONAL CHECKS
section of these instructions.
MAINTAINED AND MONITORED . IN THE EVENT THAT THE BUILDING
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.
SHOULD BE DRAINED AS WELL AND , IN SUCH CASE , ALTERNATIVE HEAT
BUILDING IN WHICH ANY SUCH DEVICE IS LOCATED WILL BE VACANT,
CARE SHOULD BE TAKEN THAT SUCH DEVICE IS ROUTINELY INSPECTED,
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
SOURCES SHOULD BE UTILIZED.
WARNING
A gas-fired furnace for installation in a residential garage
must be installed as specified in the LOCATION REQUIREMENTS AND CONSIDERATIONS section of this manual.
TO PREVENT POSSIBLE PROPERTY DAMAGE , PERSONAL INJURY OR
DEATH DUE TO ELECTRICAL SHOCK , THE FURNACE MUST BE LOCATED TO
PROTECT THE ELECTRICAL COMPONENTS FROM WATER .
This furnace may be used as a construction site heater only
if certain conditions are met. These conditions are listed in
the PRODUCT APPLICATION section of this manual.
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 effect on combustion quality and pressure switch action.
3
DANGER
CARBON MONOXIDE POISONING HAZARD
Special warning for installation of furnaces or air handling units in enclosed area such as garages, utility rooms or parking areas. Carbon monoxide producing
devices (such as automobile, space heater, gas water heater, etc.) Should not be operated in enclosed areas such as unventilated garages or utility rooms because
of the danger of carbon monoxide (CO) poisoning resulting from the exhaust emissions. If a furnace or air handler is installed in an enclosed area and a carbon
monoxide producing device is operated therein, there must be adequate direct outside ventilation. Carbon monoxide emissions can be (re)circulated throughout
the structure if the furnace or air handler is operating in any mode. CO can cause serious illness including permanent brain damage or death.
DANGER
RISQUE D'EMPOISONNEMENT AU MONOXYDE DE CARBONE
Avertissement special au sujet de l'installation d'appareils de chauffage ou de traitement d'air dans des endroits clos, tets les garages, les locaux d'entretien et les
stationnements. Evitez de mettre en marche les appareils produisant du monoxyde de carbone (tels que les automobile, les appareils de chauffage autonome,etc.)
dans des endroits non ventilés tels que les d'empoisonnement au monoxyde de carbone. Si vous devez faire fonctionner ces appareils dans un endroit clos,
assures-vous qu'il y ait une ventilation directe provenant de l'exterie . Les émissions de monoxyde de carbone peuvent etre recircules dans les endroits clos,
si l'appareil de chauffage ou de traitement d'air sont en marche. Le monoxyde de carbone peut causer des maladies graves telles que des dommages permanents
au cerveau et meme la mort.
PELIGRO
' POR MONÓXIDO DE CARBONO
RIESGO DE INTOXICACIÓN
Advertencia especial para la instalación de calentadores ó maneja oras de aire en áreas cerradas como estacionamientos ó cuartos de servicio. Los equipos ó
aparatos que producen monóxido de carbono (tal como automóvil, calentador de gas, calentador de agua por medio de gas, etc) no deben ser operados en
áreas cerradas debido al riesgo de envenenamiento por monóxido de carbono (CO) que resulta de las emisiones de gases de combustión. Si el equipo ó
aparato se opera en dichas áreas, debe existir una adecuada ventilac ón directa al exterior. Las emisiones de monóxido de carbono pueden circular a través
del aparato cuando se opera en cualquier modo. El monóxido de carbono puede causar enfermedades severas como daño cerebral permanente ó muerte.
0140M00020-D
SHIPPING INSPECTION
All units are securely packed in shipping containers tested according to International Safe Transit Association specifications. The
carton must be checked upon arrival for external damage. If damage is found, a request for inspection by carrier’s agent must be
made in writing immediately.
WARNING
SHOULD 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.
The furnace must be carefully inspected on arrival for damage and
WARNING
bolts or screws which may have come loose in transit. In the event
of damage the consignee should:
POSSIBLE PROPERTY DAMAGE , PERSONAL INJURY OR DEATH DUE TO
1. Make a notation on delivery receipt of any visible damage to
FIRE, EXPLOSION , SMOKE, SOOT, CONDENSATION , ELECTRICAL SHOCK
shipment or container.
OR CARBON MONOXIDE MAY RESULT FROM IMPROPER INSTALLATION,
2. Notify carrier promptly and request an inspection.
REPAIR OPERATION, OR MAINTENANCE OF THIS PRODUCT.
3. With concealed damage, carrier must be notified as soon as
possible - preferably within five days.
4. File the claim with the following support documents within a nine month statute of limitations.
•
Original or certified copy of the Bill of Lading, or indemnity bond.
•
Original paid freight bill or indemnity in lieu thereof.
•
Original or certified copy of the invoice, showing trade and other discounts or reductions.
•
Copy of the inspection report issued by carrier’s representative at the time damage is reported to carrier.
The carrier is responsible for making prompt inspection of damage and for a thorough investigation of each claim. The distributor or
manufacturer will not accept claims from dealers for transportation damage.
ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS
NOTE: Discharge your body’s static electricity before touching unit. An electrostatic discharge can adversely affect electrical
components.
Use the following precautions during furnace installation and servicing to protect the integrated control module from damage. By
putting the furnace, the control, and the person at the same electrostatic potential, these steps will help avoid exposing the
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.
4
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.
TO THE INSTALLER
Before installing this unit, please read this manual thoroughly to
familiarize yourself with specific items which must be adhered to,
including but not limited to: unit maximum external static pressure, gas pressures, BTU input rating, proper electrical connections, circulating air temperature rise, minimum or maximum CFM,
and motor speed connections.
WARNING
TO PREVENT PROPERTY DAMAGE , PERSONAL INJURY OR DEATH DUE TO
FIRE, DO NOT INSTALL THIS FURNACE IN A MOBILE HOME, TRAILER , OR
RECREATIONAL VEHICLE.
PRODUCT APPLICATION
This furnace is primarily designed for residential home-heating applications. It is NOT designed or certified for use in mobile homes,
trailers or recreational vehicles. Neither is it designed or certified for outdoor applications. The furnace must be installed indoors
(i.e., attic space, crawl space, or garage area provided the garage area is enclosed with an operating door).
This furnace can be used in the following non-industrial commercial applications:
Schools, 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.
•
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-certified appliance and is appropriate for use
with natural or propane gas (NOTE: If using propane, a propane conversion kit is required).
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.
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.
•
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 maintained during construction replaced as appropriate during construction, and
upon completion of construction.
•
The input rate and temperature rise are set per the furnace rating plate.
•
100% outside air is provided for combustion air requirements during construction. Temporary ducting can be used.
NOTE: Do not connect the temporary duct directly to the furnace. The duct must be sized for adequate combustion and
ventilation in accordance with the latest edition of the National Fuel Gas Code NFPA 54/ANSI Z223.1 or CAN/CSA B149.1
Installation Codes.
•
The furnace heat exchanger, components, duct system, air filters and evaporator coils are thoroughly cleaned following final
construction clean up.
•
All furnace operating conditions (including ignition, input rate, temperature rise and venting) are verified according to
these installation instructions.
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.
5
•
•
A T-handle gas cock must be used.
If the unit is to be installed in an attic, the passageway to and the service area around the unit must have flooring.
To ensure proper furnace operation, install, operate and maintain the furnace in accordance with these installation and
operation instructions, all local building codes and ordinances. In their absence, follow the latest edition of the National Fuel Gas
Code (NFPA 54/ANSI Z223.1), and/or CAN/CSA B149 Installation Codes, local plumbing or waste water codes, and other applicable
codes.
A copy of the National Fuel Gas Code (NFPA 54/ANSI Z223.1) can be obtained from any of the following:
American National Standards Institute
25 West 43rd Street, 4th Floor
New York, NY 10036
National Fire Protection Association
1 Batterymarch Park
Quincy, MA 012169-7471
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 Installation Codes can also be obtained from:
CSA International • 178 Rexdale Boulevard • Etobicoke, Ontario, Canada M9W 1R3
LOCATION REQUIREMENTS & CONSIDERATIONS
Follow the instructions listed below and the guidelines provided in the Combustion and Ventilation Air Requirements section when
selecting a furnace location.
WARNING
WARNING
POSSIBLE PROPERTY DAMAGE , PERSONAL INJURY OR DEATH DUE TO
FIRE, EXPLOSION , SMOKE, SOOT, CONDENSATION , ELECTRICAL SHOCK
TO PREVENT POSSIBLE EQUIPMENT DAMAGE , PROPERTY DAMAGE,
PERSONAL INJURY OR DEATH , THE FOLLOWING BULLET POINTS MUST BE
OBSERVED WHEN INSTALLING THIS UNIT.
•
•
•
•
•
•
•
•
•
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/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 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
6
•
•
•
•
•
•
•
•
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
Seal off a non-direct vent furnace if it is installed near an area frequently 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, vent 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 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 (upflow or downflow) applications, the minimum cooling coil width shall not be less than furnace width
minus 1”. Additionally, a coil installed above an upflow furnace or under a counterflow furnace may be the same
width as the furnace or may be one size larger than the furnace. Example: a “C” width coil may be installed with
a “B” width furnace.
For upflow applications, the front of the coil and furnace must face the same direction.
If the furnace is installed in a residential garage, position the furnace so that the burners and ignition source are located not
less than 18 inches (457 mm) above the floor. Protect the furnace from physical damage by vehicles.
If the furnace is installed horizontally, ensure the access doors are not on the “up/top” or “down/bottom” side of the
furnace.
Do not connect this furnace to a chimney flue that serves a separate appliance designed to burn solid fuel.
On Counterflow Installations, the air conditioning coil must be downstream on the supply (positive) side of the
furnace heat exchanger.
Counterflow Installation over a noncombustible floor. Before setting the furnace over the plenum opening, ensure
the surface around the opening is smooth and level. A tight seal should be made between the furnace base and floor
by using a silicone rubber caulking compound or cement grout.
Counterflow Installation over a combustible floor. If installation over a combustible floor becomes necessary, use an accessory
subbase (see Specification Sheet applicable for your model for details.) A special accessory subbase must be used for upright
counterflow unit installations over any combustible material including wood. Refer to subbase instructions for installation
details. Follow the instructions with the subbase for proper installation. Do not install the furnace directly on carpeting, tile,
or other combustible material other than wood flooring. (NOTE: The subbase will not be required if an air conditioning coil
is installed between the supply air opening on the furnace
and the floor.)
CLEARANCES
AND
ACCESSIBILITY
NOTES:
•
For servicing or cleaning, a 24” front clearance is
required.
•
Unit connections (electrical, flue and drain) may
necessitate greater clearances than the minimum
clearances listed above.
•
In all cases, accessibility clearance must take
precedence over clearances from the enclosure
where accessibility clearances are greater.
*M SS[92 & 96]* MINIMUM CLEARANCES TO COMBUSTIBLE MATERIALS
(INCHES)
POSITION*
SIDES
REAR
FRONT
BOTTOM
FLUE
TOP
Upflow
0"
0"
3"
C
0"
1"
Horizontal
6"
0"
3"
C
0"
6"
C = If placed on combustible floor, floor MUST be wood only.
*CSS[92 & 96]* MINIMUM CLEARANCES TO COMBUSTIBLE MATERIALS
(INCHES)
POSITION*
SIDES
REAR
FRONT
BOTTOM
FLUE
Counterflow
0"
0"
3"
NC
0"
TOP
1"
NOTES:
Horizontal
6"
0"
3"
C
0"
6"
•
For servicing or cleaning, a 24” front clearance is
C = If placed on combustible floor, floor MUST be wood only.
required.
•
Unit connections (electrical, flue and drain) may NC = For installation on non-combustible floors only. A combustible subbase
must be used for installations on combustible flooring.
necessitate greater clearances than the minimum
clearances listed above.
•
In all cases, accessibility clearance must take precedence over clearances from the enclosure where accessibility
clearances are greater.
Installations must adhere to the clearances to combustible materials to which this furnace has been design certified. The minimum
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/flue connections are used additional clearance must be provided to accommodate these connections.
Refer to Vent/Flue Pipe and Combustion Air Pipe for details.
7
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
TOP
SIDE
SIDE
SIDE
BOTTOM
BOTTOM
Upflow
Counterflow
Horizontal
Figure 1
A furnace installed in a confined 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 Specification 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 confined space. In a typical construction, the clearance between the door and door
frame is usually adequate to satisfy this ventilation requirement.
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 GasFired Central Furnaces ANSI Z21.47, CSA-2.3 latest edition Section 1.23.1.
The following steps shall be followed with each appliance connected to the venting system placed in operation, while any other appliances connected to the venting
system are not in operation:
1. Seal any unused openings in the venting system.
2. Inspect the venting system for proper size and horizontal pitch, as required by the National Fuel Gas Code, ANSI Z223.1
or the Natural Gas and Propane Installation Code, CSA B149.1-05 and these instructions. Determine that there is no
blockage or restriction, leakage, corrosion and other deficiencies which could cause an unsafe condition.
3. As far as practical, close all building doors and windows and all doors between the space in which the appliance(s)
connected to the venting system are located and other spaces of the building.
4. Close fireplace dampers.
5. Turn on clothes dryers and any appliance not connected to the venting system. Turn on any exhaust fans, such as range
hoods and bathroom exhausts, so they shall operate at maximum speed. Do not operate a summer exhaust fan.
6. Follow the lighting instructions. Place the appliance being inspected in operation. Adjust thermostat so appliance shall
operate continuously.
7. Test for spillage from draft hood appliances at the draft hood relief opening after 5 minutes of main burner operation.
Use the flame of a match or candle.
8. If improper venting is observed during any of the above tests, the venting system must be corrected in accordance with
the National Fuel Gas Code ANSI Z223.1/NFPA 54 and/or National Gas and Propane Installation Code CSA B149.1-05.
9. After it has been determined that each appliance connected to the venting system properly vents when tested as
outlined above, return doors, windows, exhaust fans, fireplace dampers and any other gas burning appliance to their
previous conditions of use.
8
If resizing is required on any portion of the venting system, use the appropriate table in Appendix G in the latest edition of the
National Fuel Gas Code ANSI Z223.1 and/or CSA B149.1-05 Installation Codes.
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.
COMBUSTION & VENTILATION AIR REQUIREMENTS
WARNING
Improved construction and additional insulation in buildings have
TO AVOID PROPERTY DAMAGE , PERSONAL INJURY OR DEATH,
reduced heat loss by reducing air infiltration and escape around
SUFFICIENT FRESH AIR FOR PROPER COMBUSTION AND VENTILATION OF
doors and windows. These changes have helped in reducing heatFLUE GASES MUST BE SUPPLIED . MOST HOMES REQUIRE OUTSIDE AIR BE
ing/cooling costs but have created a problem supplying combusSUPPLIED INTO THE FURNACE AREA.
tion and ventilation air for gas fired and other fuel burning appliances. Appliances that pull air out of the house (clothes dryers,
exhaust fans, fireplaces, etc.) increase the problem by starving appliances for air.
House depressurization can cause back drafting or improper combustion of gas-fired 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 B1491-05 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.
INSTALLATION POSITIONS
Figure 2A
Figure 2B
Figure 2C
Recommended Installation Positions
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 upright upflow furnaces, return air ductwork may be attached to the side panel(s) and/or basepan. For
horizontal upflow furnaces, return air ductwork must be attached to the basepan. For both upright or horizontal counterflow
furnaces, return ductwork must be attached to the basepan (top end of the blower compartment). NOTE: Ductwork must never
9
be attached to the back of the furnace. Contact your distributor for proper airflow requirements and number of required ductwork
connections. Refer to “Recommended Installation Positions” figure for appropriate installation positions, ductwork connections,
and resulting airflow arrangements.
HORIZONTAL APPLICATIONS & CONSIDERATIONS
When installing a furnace horizontally, additional consideration
must be given to the following:
FURNACE SUSPENSION
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 floor joist or supported by a concrete pad. Never install
the furnace on the ground or allow it to be exposed to water.
2"X2"X3/8" ANGLE
(3 PLACES)
IRON
FRONT COVER PRESSURE SWITCH TUBE LOCATION
Figure 3
When an upflow model is installed horizontally with left side
down or a counterflow model is installed horizontally with right
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.
3. Locate 24” x 1/4” tube in parts bag.
4. Install one end on front cover pressure switch.
5. Route tube to lower port on collector box cover and cut off excess tubing.
DRAIN TRAP AND LINES
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
Leveling ensures proper condensate drainage from the heat exchanger and induced draft blower. For proper flue 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 flow forward to the recuperator coil front cover.
ALTERNATE ELECTRICAL AND GAS LINE CONNECTIONS
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.
DRAIN PAN
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).
FREEZE PROTECTION
Refer to Horizontal Applications and Conditions - Drain Trap and Lines.
PROPANE GAS/HIGH ALTITUDE INSTALLATIONS
This furnace is shipped from the factory configured for natural gas at standard altitude. Propane gas installations require an orifice
and orifice change to compensate for the energy content difference between natural and propane gas.
10
High altitude installations may require both a pressure switch and
an orifice/spring change. These changes are necessary to compensate for the natural reduction in the density of both the gas
fuel and the combustion air at higher altitude.
For installations above 7000 feet, please refer to the furnace
Specification Sheets for required kit(s).
Contact the distributor for a tabular listing of appropriate
manufacturer’s kits for propane gas and/or high altitude installations. The indicated kits must be used to insure safe and proper
furnace operation. All conversions must be performed by a qualified installer, or service agency.
WARNING
POSSIBLE PROPERTY DAMAGE , PERSONAL INJURY OR DEATH MAY
OCCUR IF THE CORRECT CONVERSION KITS ARE NOT INSTALLED . THE
APPROPRIATE KITS MUST BE APPLIED TO ENSURE SAFE AND PROPER
FURNACE OPERATION .
ALL CONVERSIONS MUST BE PERFORMED BY A
QUALIFIED INSTALLER OR SERVICE AGENCY.
Manifold Pressure
Gas
VENT/FLUE PIPE & COMBUSTION AIR PIPE
Natural
A condensing gas furnace achieves its high level of efficiency by
extracting almost all of the heat from the products of combustion
and cooling them to the point where condensation takes place.
Because of the relatively low flue gas temperature and water condensation requirements, PVC pipe is used as venting material.
Propane
Altitude
Kit
Orifice
High
Stage
Low
Stage
Pressure
Switch
Change
None
#45
3.5" w.c.
1.9" w.c.
None
10.0" w.c. 6.0" w.c.
None
0-7000
In addition to PVC and ABS pipe and fittings, Innoflue® 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. and Canada. Manufacturers Installation
instructions for these products must be followed. These products have specific instructions for installing, joining and terminating. Do not mix materials or components of one manufacturer with materials or components of another manufacturer.
All furnaces are built with 2" vent / intake pipe and connectors. For furnaces requiring installation of 3" pipe, the transition from 2" to 3" should be done as close to the furnace as
practically possible.
LPM-07* 1 1.25mm
1 LPM-07* supports both Honeywell and White-Rodgers 1-stage valves
NOTE: In Canada, gas furnaces are only certified to 4500 feet.
WARNING
FAILURE TO FOLLOW THESE INSTRUCTIONS CAN RESULT IN BODILY
INJURY OR DEATH . CAREFULLY READ AND FOLLOW ALL INSTRUCTIONS
GIVEN IN THIS SECTION .
WARNING
UPON COMPLETION OF THE FURNACE INSTALLATION, CAREFULLY
INSPECT THE ENTIRE FLUE SYSTEM BOTH INSIDE AND OUTSIDE OF THE
FURNACE TO ASSURE IT IS PROPERLY SEALED . LEAKS IN THE FLUE
SYSTEM CAN RESULT IN SERIOUS PERSONAL INJURY OR DEATH DUE TO
EXPOSURE TO FLUE PRODUCTS, INCLUDING CARBON MONOXIDE.
This furnace must not be connected to Type B, BW, or L vent or
vent connector, and must not be vented into any portion of a factory built or masonry chimney except when used as a pathway for PVC
as described later in this section. Never common vent this appliance with another appliance or use a vent which is used by a solid fuel
appliance. Do not use commercially available “no hub connectors” other than those shipped with this product.
It is the responsibility of the installer to follow the manufacturers’ recommendations and to verify that all vent/flue piping and
connectors are compatible with furnace flue products. Additionally, it is the responsibility of the installer to ensure that all piping and
connections possess adequate structural integrity and support to prevent flue pipe separation, shifting, or sagging during furnace
operation.
DUAL CERTIFICATION: NON-DIRECT/DIRECT VENT
This furnace is dual certified and may be installed as a non-direct vent (single pipe) or direct vent (dual pipe) appliance. A non-direct
vent installation requires only a vent/flue pipe, while a direct vent installation requires both a vent/flue pipe and a combustion air
intake pipe. Refer to the appropriate section for details concerning piping size, length, number of elbows, furnace connections, and
terminations.
MATERIALS AND JOINING METHODS
Two-three-inch nominal diameter PVC Schedule 40 pipe meeting ASTM D1785, PVC primer meeting ASTM F656, and PVC
solvent cement meeting ASTM D2564 specifications must be
used. Fittings must be DWV type fittings meeting ASTM D2665
and ASTM D3311. Carefully follow the manufacturer’s instructions for cutting, cleaning, and solvent cementing of PVC.
11
WARNING
TO 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 .
AVOID BREATHING CEMENT VAPORS OR CONTACT WITH SKIN AND/OR
EYES.
The use of Schedule 40 PVC or ABS cellular core (Foam Core) plastic pipe is also acceptable as a flue/vent and intake pipe
material. PVC primer meeting ASTM F656 and PVC solvent cement meeting ASTM D2564 specifications must be used.
Fittings must be DWV type fittings meeting ASTM D2665 and ASTM D3311. Carefully follow the manufactures instructions for
cutting, cleaning and solvent cementing of PVC.
For Canadian installations; all PVC pipe, fittings and joining materials must be UL S636 listed.
As an alternative to PVC pipe, primer, solvent cement, and fittings, ABS materials which are in compliance with the following
specifications may be used. Two-or-three-inch ABS Schedule 40 pipe must meet ASTM D1527 and, if used in Canada, must be CSA
listed. Solvent cement for ABS to ABS joints must meet ASTM D2235 and, if used in Canada, must be CSA listed. The solvent cement
for the PVC to ABS transition joint must meet ASTM D3138. Fittings must be DWV type fittings meeting ASTM D2661 and ASTM D3311
and, if used in Canada, must be CSA listed. Carefully follow the manufacturers’ instructions for cutting, cleaning, and solvent
cementing PVC and/or ABS.
All 90° elbows must be medium radius (1/4 bend DWV) or long radius (Long sweep 1/4 bend DWV) types conforming to ASTM D3311.
A medium radius (1/4 bend DWV) elbow measures 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.
PROPER VENT/FLUE AND COMBUSTION AIR PIPING PRACTICES
Adhere to these instructions to ensure safe and proper furnace performance. The length, diameter, and number of elbows of the
vent/flue pipe and combustion air pipe (when applicable) affects the performance of the furnace and must be carefully sized. All
piping must be installed in accordance with local codes and these instructions.
Some models require the use of 3” pipe. Do not transition from a 2” to 3” pipe in a horizontal section of pipe as this may
create a water trap.
PREFERRED
ACCEPTABLE
NO TRANSITION ON
HORIZONTAL PLANE,
THIS CREATES A
WATER TRAP AND
RESTRICTS FLUE
GASES
TRANSITION NO LESS
THAN 45 DEGREES TO
HORIZONTAL PLANE TO
AVOID CREATING A WATER
TRAP IN VENT PIPING.
Figure 4
Figure 5
Figure 6
Piping must be adequately secured and supported to prohibit sagging, joint separation, and/or detachment from the furnace.
Horizontal runs of vent/flue piping must be supported every three to five feet and must maintain a 1/4 inch per foot downward slope,
back towards the furnace, to properly return condensate to the furnace’s drain system. Allowances should be made for minor
expansion and contraction due to temperature variations. For this reason, particular care must be taken to secure piping when a long
run is followed by a short offset of less than 40 inches.
Precautions should be taken to prevent condensate from freezing inside the vent/flue pipe and/or at the vent/flue pipe termination.
All vent/flue piping exposed to freezing temperatures below 35°F for extended periods of time must be insulated with 1/2” thick
closed cell foam. Also all vent/flue piping exposed outdoors in excess of the terminations shown in this manual (or in unheated areas)
must be insulated with 1/2” thick closed cell foam. Inspect piping for leaks prior to installing insulation.
TERMINATION LOCATIONS
NOTE: Refer to Location Requirements and Considerations for combustion air contaminant restrictions.
The following bullets and diagram describe the restrictions concerning the appropriate location of vent/flue pipe and combustion air
intake pipe (when applicable) terminations. Refer to Non-Direct Vent (Single Pipe) Piping and Direct Vent (Dual Pipe) Piping located
in this section for specific details on termination construction.
• All terminations (flue and/or intake) must be located at least 12 inches above ground level or the anticipated snow level.
• Vent terminations (non-direct and direct vent) must terminate at least 3 feet above any forced air inlet located within 10
feet.
NOTE: This provision does not apply to the combustion air intake termination of a direct vent application.
12
•
•
•
•
•
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.
The vent termination of a direct vent application must
terminate at least 12 inches from any opening through which
flue 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 inches above the roof line (or
the anticipated snow level) and be at least 12 inches 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.
Non-Direct Vent
&
Direct Vent
Vent/Flue Terminations
Non-Direct Vent
Vent/Flue Termination
No Terminations
Above Walkway
<10'
4' min.
12"
3' min.
4'
min.
12"
min.
Grade or Highest
Anticipated
Snow Level
12" min.
Non-Direct Vent
Vent/Flue Termination
12" min.
Forced Air
Inlet
Direct Vent
Vent/Flue Termination
Vent Termination Clearances
Figure 7
NOTE: In Canada, the Canadian Fuel Gas Code takes precedence over the preceding termination restrictions.
CANADIAN VENTING REQUIREMENTS
In Canada, venting must conform to the requirements of the current CAN/CSA-B149.1-05 Installation Code. Use only CSA-listed, ULCS636 compliant two- or three-inch diameter PVC or ABS pipe, solvent cement, and fittings throughout. The certified piping should be
clearly marked with the ULC Std “S636” on the pipe and fittings. Carefully follow the pipe manufacturers’ instructions for cutting,
cleaning, and solvent cementing PVC and/or ABS.
The vent can be run through an existing unused chimney provided the space between the vent pipe and the chimney is insulated and
closed with a weather-tight, corrosion-resistant flashing.
STANDARD FURNACE CONNECTIONS
It is the responsibility of the installer to ensure that the piping connections to the furnace are secure, airtight, and adequately
supported.
Vent/Flue Pipe
The vent pipe outlet is sized to accept 2” pipe. Secure vent/flue pipe directly into
the furnace fitting 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. Combustion Air and Vent 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 offset using two 45 degree
elbows. This joint can be rotated on the fitting to establish maximum clearance
between refrigerant lines, metering devices, and condensate drain lines, etc. This
joint is the equivalent of one 90 deg. elbow when considering elbow count.
45 DEGREE
ELBOWS
NOTE: For non-direct vent installations, a minimum of one
90° elbow should be installed on the combustion air intake
coupling to guard against inadvertent blockage.
Increased Clearance Configuration
Figure 8
DIRECT VENT INSTALLATIONS
On upflow units secure the combustion air intake pipe directly to the air intake
coupling. On counterflow 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 counterflow 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
counterflow unit air intake pipe coupling.
13
NON-DIRECT VENT INSTALLATIONS
WARNING
A minimum of one 90° elbow should be installed on the combustion air intake “coupling” to guard against inadvertent blockage.
EDGES OF SHEET METAL HOLES MAY BE SHARP. USE GLOVES AS A
PRECAUTION WHEN REMOVING HOLE PLUGS .
ALTERNATE VENT/FLUE LOCATION
Insert flange. Cut 2 ½” long.
The alternate vent/flue location is the large hole directly in line with
the induced draft blower outlet. To use the alternate vent/flue location refer to the following steps and the “Alternate Vent/Flue Location” figure. To use an alternate vent location on a counterflow
/ horizontal model, a special kit is required.
RF000142
NOTE: In the horizontal left installation position, a means of
condensate collection must be provided to keep vent pipe condensate from entering the draft inducer housing. If the vent
drain elbow is eliminated from the installation, an RF000142 kit
must be used.
1. Remove the four screws from the vent pipe flange on top
the furnace.
2. Remove the internal elbow and vent pipe
3. Cut 2 1/2" from the flange .
4. Remove plastic plug in line with the inducer outlet
5. Install cut end of the flanged section and connect to inducer
with rubber coupling supplied with furnace.
6. Install screws removed in step 1 securing flange to cabinet.
C U T H ER E
Figure 9
WARNING
THE RUBBER ELBOW IS NOT DESIGNED TO SUPPORT A LOAD. WHEN THE
RUBBER ELBOW IS MOUNTED EXTERNALLY TO THE FURNACE CABINET ,
EXTREME CARE MUST BE TAKEN TO ADEQUATELY SUPPORT FIELDSUPPLIED VENT /FLUE PIPING , AS DAMAGE CAN RESULT IN LEAKS
CAUSING BODILY INJURY OR DEATH DUE TO EXPOSURE TO FLUE GASES,
INCLUDING CARBON MONOXIDE
Figure 10
ALTERNATE COMBUSTION AIR PROVISION
(Upflow / Horizontal models only)
When using the alternate venting location, either in a horizontal left side down installation or a vertical installation using down – venting, an 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 flange from cabinet.
2. Insert cabinet plug in 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. Install combustion air flange and secure with screws
removed in step one.
14
Vent/Flue Pipe Cuts
WARNING
THE RUBBER ELBOW IS NOT DESIGNED TO SUPPORT A LOAD. WHEN THE
RUBBER ELBOW IS MOUNTED EXTERNALLY TO THE FURNACE CABINET,
EXTREME CARE MUST BE TAKEN TO ADEQUATELY SUPPORT FIELDSUPPLIED VENT/FLUE PIPING, AS DAMAGE CAN RESULT IN LEAKS
CAUSING BODILY INJURY OR DEATH DUE TO EXPOSURE TO FLUE GASES,
INCLUDING CARBON MONOXIDE
CAUTION
BE SURE NOT TO DAMAGE INTERNAL WIRING OR OTHER COMPONENTS
WHEN REINSTALLING COUPLING AND SCREWS.
NON-DIRECT VENT (SINGLE PIPE) PIPING
Non-direct vent installations require only a vent/flue pipe. The vent pipe can be run horizontally with an exit through the side of the
building or run vertically with an exit through the roof of the building. The vent can also be run through an existing unused chimney;
however, it must extend a minimum of 12 inches above the top of the chimney. The space between the vent pipe and the chimney
must be closed with a weather-tight, corrosion-resistant flashing.
Although non-direct vent installations do not require a combustion air intake pipe, a minimum of one 90° elbow should be attached
to the furnace’s combustion air intake if: an upright installation uses the standard intake location, or a horizontal installation uses the
alternate air intake location. This elbow will guard against
inadvertent blockage of the air intake.
*MSS9* / *CSS9 Direct Vent (2-Pipe)
& Non-Direct Vent (1-Pipe) (6)
Maximum Allowable Length of Vent/FLue Pipe
& Combustion Air Pipe (Ft) (1) (2)
VENT/FLUE PIPE LENGTHS AND DIAMETERS
NOTE: If either a 90 degree or 45 degree elbow is used for
termination, it must be pointed downward.
Refer to the Direct and Non-Direct Vent Table for applicable
length, elbows, and pipe diameter for construction of the vent/
flue pipe system of a non-direct vent installation. In addition
to the vent/flue pipe, a single 90° elbow should be secured to
the combustion air intake to prevent inadvertent blockage. The
tee used in the vent/flue termination must be included when
determining the number of elbows in the piping system.
Number of Elbows
Model
*MSS9*0402BNA*
*MSS9*0603BNA*
*MSS9*0803BNA*
VENT/FLUE PIPE TERMINATIONS
NOTE: If either a 90 degree or 45 degree elbow is used for
termination, it must be pointed downward.
The vent/flue pipe may terminate vertically, as through a roof,
or horizontally, as through an outside wall.
Vertical vent/flue pipe terminations should be as shown in the
following figure. Refer to Vent/Flue Pipe and Combustion Air
Pipe - Termination Locations for details concerning location restrictions. The penetration of the vent through the roof must
be sealed tight with proper flashing such as is used with a plastic plumbing vent.
Horizontal vent/flue pipe terminations should be as shown in
the following figure. Refer to Vent/Flue Pipe and Combustion
Air Pipe. 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 fittings to be installed on the inside and outside of the wall. The
wall penetration should be sealed with silicone caulking
material.
*MSS9*0804CNA*
*MSS9*0805CNA*
*MSS921004CNA*
*MSS921005CNA*
*MSS961005CNA*
(3) (5)
Pipe
Size
1
2
3
4
5
6
7
8
2"
145
140
135
130
125
120
115
110
3"
238
231
224
217
210
203
196
189
2"
220
215
210
205
200
195
190
185
3"
224
217
210
203
196
189
182
175
2"
95
90
85
80
75
70
65
60
3"
238
231
224
217
210
203
196
189
2"
95
90
85
80
75
70
65
60
3"
238
231
224
217
210
203
196
189
2"
45
40
35
30
25
20
15
10
3"
217
210
203
196
189
182
175
168
2"
45
40
35
30
25
20
15
10
3"
217
210
203
196
189
182
175
168
*MSS9*1205DNA*
3"
238
231
224
217
210
203
196
189
Model
Pipe
Size
1
2
3
4
5
6
7
8
2"
145
140
135
130
125
120
115
110
3"
238
231
224
217
210
203
196
189
2"
120
115
110
105
100
95
90
85
3"
224
217
210
203
196
189
182
175
2"
95
90
85
80
75
70
65
60
3"
238
231
224
217
210
203
196
189
2"
25
20
15
10
5
n/a
n/a
n/a
3"
238
231
224
217
210
203
196
189
3"
238
231
224
217
210
203
196
189
*CSS9*0402BNA*
*CSS9*0603BNA*
*CSS9*0804CNA*
*CSS9*1005CNA*
*CSS9*1205DNA*
1)
2)
NOTE: Terminate both pipes in the same pressure zone
(same side of roof, no major obstacles between pipes,
etc.).
3)
4)
5)
6)
15
Maximum allowable limits listed on individual lengths for inlet and flue and NOT
a combination.
Minimum requirement for each vent pipe is five (5) feet in length and one
elbow/tee.
Tee used in the vent/flue termination must be included when determining the
number of elbows in the piping system.
2 1/2” or 3” diameter pipe can be used in place of 2” diameter pipe.
Increased Clearance Configurations using (2) 45 deg. Long Sweep elbows should
be considered equivalent to one 90 deg. elbow.
One 90° elbow should be secured to the combustion air intake connection.
DOWN VENTING UPFLOW MODEL FURNACES ONLY
Use alternate vent
& combination air locations
Vent Pipe
r
Floo
Combustion Air Pipe
t
men
e
s
a
B
To Field Supplied
Condensate Disposal
e
spac
l
w
a
/ Cr
ot
Slope 1/4” per fo
Field Supplied
Drain Tee on Vent Pipe
min.
Condensate trapped
to previent flue gas from escaping
All piping and fittings must be joined per material manufacturer’s specifications
to prevent separation and flue gas leaks.
Figure 11
TEE (OPTIONAL)
12" MIN.
COMBUSTION AIR INTAKE
(OPTIONAL)
12” MIN
HEIGHT DIFFERENCE
BETWEEN
INTAKE AND VENT
*Not required for
single pipe installation
O
RO
FL
VENT/FLUE TEE (OPTIONAL)
or
45° ELBOW
TURNED DOWN or
90° ELBOW TURNED
DOWN
IN E
INTAKE
SCREEN
OPTIONAL
.
AX
”M
6
9
12” MIN TO ROOF OR HIGHEST
ANTICIPATED SNOW LEVEL
IN.
”M
3
-
12" MIN. ABOVE
HIGHEST ANTICIPATED
SNOW LEVEL
Figure 12
Horizontal Termination (Single Pipe)
Above Highest Anticipated Snow Level
Figure 14
ELBOWS
STRAIGHT
Figure 13
16
DIRECT VENT (DUAL PIPE) PIPING
The inlet air screens provided in the installation instruction packet are available for the installer to use in the inlet of the combustion
air pipe to prevent animals from building nests in the combustion air pipe. Installation of screens, while strongly recommended, is
not required and will not affect performance of the unit.
Direct vent installations require both a combustion air intake and a vent/flue pipe. The pipes may be run horizontally and exit
through the side of the building or run vertically and exit through the roof of the building. The pipes may be run through an existing
unused chimney; however, they must extend a minimum of 12 inches above the top of the chimney. The space between the pipes
and the chimney must be closed with a weather tight, corrosion resistant flashing. Both the combustion air intake and a vent/flue
pipe terminations must be in the same atmospheric pressure zone. Refer to Vent/Flue and Combustion Air Pipe - Termination
Locations or Concentric Vent Termination for specific details on termination construction. For details concerning connection of pipes
to the furnace, refer to the Vent/Flue Pipe and Combustion Pipe - Standard Furnace Connections or Alternate Furnace Connections.
VENT/FLUE & COMBUSTION AIR PIPE LENGTHS & DIAMETERS
Refer to the following table for applicable length, elbows, and pipe diameter for construction of the vent/flue and combustion air
intake pipe systems of a direct vent (dual pipe) installation. The
10”- 24”
number of elbows tabulated represents the number of elbows and/
or tees in each (Vent/Flue & Combustion Air Intake) pipe. Elbows
and/or tees used in the terminations must be included when determining the number of elbows in the piping systems.
6” MAX
If the combustion air intake pipe is to be installed above a finished
ceiling or other area where dripping of condensate will be objectionable, insulation of the combustion air pipe may be required.
Use 1/2” thick closed cell foam insulation such as Armaflex™
or Insultube™ where required.
4” MIN
90º OR 45°
ELBOW
SCREEN
(OPTIONAL)
VENT/FLUE AND COMBUSTION AIR PIPE TERMINATIONS
The vent/flue and combustion air pipes may terminate vertically,
as through a roof, or horizontally, as through an outside wall.
Vertical pipe terminations should be as shown in the following figure. Refer to Vent/Flue Pipe and Combustion Pipe - Termination
Locations for details concerning location restrictions. The
penetrations through the roof must be sealed tight with proper
flashing such as is used with a plastic plumbing vent.
12" MIN. TO GRADE OR
HIGHEST ANTICIPATED
SNOW LEVEL
Standard Horizontal Terminations (Dual Pipe)
Figure 15
90°
ELBOWS
Vent & Combustion Air Intake Measurements for Standard Horizontal Terminations (Dual Pipe)
3” - 24”
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.
AIR
INTAKE
SCREEN
(OPTIONAL)
VENT/INTAKE TERMINATIONS FOR INSTALLATION OF MULTIPLE
DIRECT VENT FURNACES
12" MIN. ABOVE
HIGHEST ANTICIPATED
SNOW LEVEL
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.
Alternate Horizontal Vent Termination (Dual Pipe)
Figure 16
17
If more than one direct vent furnace is to be installed horizontally through a common side wall, maintain the clearances as in the
following figure. Always terminate all exhaust vent outlets at the same elevation and always terminate all air intakes at the same
elevation.
90°
ELBOWS
3”MIN
24”MAX
12” MIN SEPARATION
3”-24” BETWEEN PIPES
3” MIN
AIR
INTAKE
SCREEN
(OPTIONAL)
OPTIONAL
INTAKE
SCREENS
12" MIN. ABOVE
HIGHEST ANTICIPATED
SNOW LEVEL
Combustion Air Intake may also be snorkeled to obtain 12” min
ground clearance.
Alternate Vent Termination Above Anticipated Snow Level
(Dual Pipe)
Figure 17
12” MIN TO GRADE OR HIGHEST
ANTICIPATED SNOW LEVEL
Termination of Multiple Direct Vent Furnaces
Figure 18
CONCENTRIC VENT TERMINATION
Refer to the directions provided with the Concentric Vent Kit (DCVK) for installation specifications.
SIDE WALL VENT KIT
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.
H orizontal Installation
Refer to the directions furnished with the Side Wall Vent Kit
(p/n 0170K00000S or 0170K000001S) for installation specifications.
Ve rtica l Installation
Side Wall Vent Kit
Figure 19
CONDENSATE DRAIN LINES & DRAIN TRAP
A condensing gas furnace achieves its high level of efficiency 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 specific 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.
18
•
•
•
•
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.
NOTE: In vertical installations, air conditioning coil condensate may drain into the furnace trap as long as there is a trap
between the coil and the furnace trap and the drain pipe is not terminating below the water level of the furnace trap.
GENERAL DRAIN INFORMATION
All furnace models come with a factory installed drain trap. For vertical installations, the trap will remain in the factory
position except for a counterflow 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
FIELD SUPPLIED DRAIN
#2
#1
Drain the furnace and air conditioning coil if applicable, in compliance with code requirements. In horizontal or counterflow installations, a field installed rubber coupling will allow the drain trap to be
removed for cleaning. The drain trap must be primed before initial
furnace start up. When an air conditioning coil drain is connected
to the field supplied furnace drain, it must be vented.
#3
#5
#4
#8
#7
#9
#10
#6
#11
Coupling
100 Degree
Elbow
Figure 20
NOTE: Hoses are model specific
and not all hoses will be shipped with all models.
19
UPFLOW MODEL INSTALLED VERTICALLY
The trap and factory installed hoses remain as shipped.
The furnace drain may exit either the right or left side of
the furnace cabinet.
DRAIN EXITING RIGHT SIDE
1. Locate and Install the 45º pipe / hose drain coupling
from the outside of the cabinet (barbed end goes in
the cabinet) through hole in the right side of the cabinet
and secure with two field supplied #8 self-tapping
screws (see Figure 21).
2. Locate the long drain hose #3 and cut at line “A” .
3. Install large end of hose #3 to trap outlet and secure
with 1.25" clamp.
4. Install smaller end of hose #3 on 45º elbow and secure
with 1" clamp.
5. Refer to Field Supplied Drain section for instructions
on field supplied / installed drain on outlet of furnace
trap.
Hose #1
Hose #2
45 degree
barb-pipe
adapter
45 degree
barb-pipe
adapter
Installer selects right or left side drain
and installs this hose accordingly.
Figure 21
DRAIN EXITING LEFT SIDE
1. Install the 45 degree pipe / hose drain coupling from
the outside of the cabinet (barbed end goes in the
cabinet) through the hole in the left side of the cabinet and secure with two field supplied #8 self-tapping screws (see
Figure 21).
2. Locate the long drain hose #3 and cut at “B” line for a 17.5" cabinet; cut at line “C” for a 21" cabinet; do not cut for
a “D” width cabinet.
3. Install large end of hose #3 to trap outlet and secure with 1.25" clamp.
4. Install smaller end of hose #3 on 45º elbow and secure with 1" clamp.
5. Refer to Field Supplied Drain section for instructions on field supplied / installed drain on outlet of furnace trap.
UPFLOW MODEL INSTALLED HORIZONTALLY
DOWN
WITH
RIGHT SIDE
Minimum 5 3/8" clearance is required for the drain trap beneath the furnace.
1. Remove the clamps from both ends of the drain hoses.
2. Remove the two screws holding the drain trap to the blower
deck.
3. Remove the trap and two hoses from the blower deck
4. Remove the two plugs from the right side of the cabinet
and install them in the blower deck.
5. (Draining the Vent Elbow ) Locate hose #5 and cut it at
line “C”. Install the cut end of hose #5 from outside the
cabinet through the cabinet drain hole nearest the top.
Secure it to the barbed fitting in the elbow with a red
Hose #5-Cut at “C”
Hose #11
clamp.
6. (Draining the Collector Box) Install the non-grommet end
of hose #11 from outside the cabinet in the bottom drain
Figure 22
hole. Install on collector box and secure with a silver
clamp.
7. Use two silver clamps and secure the hoses to drain trap. The trap outlet faces the front of the furnace. Secure the
trap to the cabinet using two screws removed in step 2 by inserting the two screws through the large set of holes in the
top mounting tabs of the trap into the two predrilled holes in the side of the cabinet.
20
8. Refer to Field Supplied Drain section for instructions on
field supplied / installed drain on outlet of furnace trap.
UPFLOW MODEL INSTALLED HORIZONTALLY
DOWN
WITH
LEFT SIDE
Minimum 5 3/8" clearance is required for the drain trap beneath the furnace.
1. Remove the clamps from the two drain tubes on the trap.
2. Remove the two screws holding the drain trap to the blower
deck.
3. Remove the trap and hoses from the blower deck .
4. Remove the two plugs from the left side of the cabinet
Hose #6
Hose #11
and install them in the blower deck.
Hose #5
5. (Draining the Vent Elbow) Locate hose #6. Measuring from
Figure 23
the non-grommet end; cut off and discard 1 ½” for a “D”
width cabinet, 5” for a “C” width cabinet, 8 ½” for a “B”
width cabinet.
6. Remove the rubber plug from vent – drain elbow side port. Place hose #6 on the vent – drain elbow side port and secure
with a silver clamp .
7. Place cap on vent – drain elbow barb fitting and secure with red clamp
8. Locate hose #5 and cut 3” from the non-grommet end. Discard the section without the grommet.
9. Insert the cut end of tube #5 through the lower cabinet drain hole.
10. Connect hose #6 & hose #5 using 100º elbow and secure with two red clamps
11. (Draining the Collector Box) Install the non-grommet end of hose #11 from outside the cabinet in the bottom drain hole.
Install on collector box and secure with a silver clamp.
12. Use two silver clamps and secure the hoses to drain trap. The trap outlet faces the front of the furnace. Secure the trap
to the cabinet using two screws removed in step 2 by inserting the two screws through the large set of holes in the top
mounting tabs of the trap into the two predrilled holes in the side of the cabinet.
13. Place cap on vent – drain elbow barb fitting and secure with red clamp.
14. Refer to Field Supplied Drain section for instructions on field supplied / installed
drain on outlet of furnace trap.
COUNTERFLOW MODEL INSTALLED VERTICALLY
The furnace drain may exit the right or left side of the furnace cabinet (left side preferred) Trap and factory installed hoses remain as shipped if the drain will exit the left
side of the cabinet. Draining from the right side requires relocation of the trap to
outside the cabinet.
DRAIN EXITING LEFT SIDE
1. Install a field supplied rubber coupling secured with a 1 1/4” clamp to enable removing
the trap for future cleaning. Alternately, a PVC fitting may be glued on the trap
outlet.
2. Install drain per local and National codes.
Hose #5 x 2
Hose #4 x 2
Figure 24
21
DRAIN EXITING RIGHT SIDE
1. Remove hose clamps and hoses from trap.
2. Remove trap.
3. (Draining the Vent Elbow) Insert the non-grommet
end hose #10 into the cabinet back drain hole. Secure on
vent – drain elbow barb fitting with a red clamp.
4. Insert 100º elbow into the cut end and secure with red
clamp.
5. (Draining the Collector Box) Insert non-grommet end of
hose #9 into the
cabinet front drain hole and secure on collector box drain
port with a silver clamp.
6. Mate the drain trap inlets to the hoses and secure with
silver clamps.
Figure 25
7. Line up the trap mounting holes with the pre-drilled holes
in the furnace and secure with 2 screws removed in step
2.
8. Refer to Field Supplied Drain section for instructions on field supplied / installed drain on outlet of furnace trap.
COUNTERFLOW MODEL INSTALLED HORIZONTALLY
SIDE DOWN
WITH
RIGHT
Minimum 5 3/8" clearance is required for the drain trap beneath
the furnace.
1. Remove hose clamps and hoses from trap.
2. Remove trap.
3. (Draining the Collector Box) From outside the cabinet, insert
the non-grommet end hose #8 into the back drain hole.
4. Secure to collector box drain port using a silver clamp.
5. (Draining the Vent Elbow) From outside the cabinet, insert
the non-grommet end of hose #7 into the front cabinet drain
hole and secure on the vent – drain elbow barb fitting using a
red clamp
6. Mate the trap inlets to the hoses, the outlet of the trap must
face the original bottom of the furnace. Secure with silver
clamps.
7. Fasten the drain trap to the cabinet with two screws removed
in step 2
8. Refer to Field Supplied Drain section for instructions on field
supplied / installed drain on outlet of furnace trap.
COUNTERFLOW MODEL INSTALLED HORIZONTALLY
SIDE DOWN
WITH
Drain Port
Hose #7
Hose #8
Figure 26
Hose #4
LEFT
Minimum 5 3/8" clearance is required for the drain trap beneath
the furnace.
1. Remove hose clamps and hoses from trap.
2. Remove trap.
3. Remove plugs from left side of cabinet and install in blower
deck.
4. (Draining the Collector Box) Locate hose #4 and place the
radius end on the collector box drain port, secure with a
silver clamp.
Hose #4
Hose #5 x2
Figure 27
22
5. Locate hose #2, insert from outside the cabinet in the drain hole closest to the front of the cabinet, insert a coupling and
secure with a red clamp.
6. Mate coupling to hose #4 and secure with a red clamp.
7. (Draining the Vent Elbow) Remove plug from vent – drain elbow side port.
8. Locate hose #4 and place radius end on the side port of vent – drain elbow and secure with a red clamp.
9. Install cap on vent drain elbow barb fitting and secure with red clamp.
10. Insert PVC pipe into hose #4 and secure with a red clamp.
11. Locate hose #5, insert it from outside the cabinet in the drain hole farthest from the front of the cabinet.
12. Insert 100º elbow in hose #5 and secure with a red clamp.
13. Locate another hose #5 cut a 5.25" straight section and discard the radius end.
14. Connect the 5.25’ straight section to the 100º elbow and the PVC pipe and secure with red clamps.
15. Mate trap inlets and hoses and secure with silver clamps, drain trap outlet must point to the original bottom of the
furnace.
16. Secure trap to furnace using two screws removed in step 2.
17. Refer to Field Supplied Drain section for instructions on field supplied / installed drain on outlet of furnace trap.
ELECTRICAL CONNECTIONS
WARNING
WIRING HARNESS
The wiring harness is an integral part of this furnace. Wires are
color coded for identification purposes. Refer to the wiring diagram for wire routings. If any of the original wire as supplied
with the furnace must be replaced, it must be replaced with
wiring material having a temperature rating of at least 105° C.
Any replacement wiring must be a copper conductor.
115 VOLT LINE CONNECTIONS
Before proceeding with electrical connections, ensure that the
supply voltage, frequency, and phase correspond to that specified on the unit rating plate. Power supply to the furnace must
be NEC Class 1, and must comply with all applicable codes. The
furnace must be electrically grounded in accordance with local
codes or, in their absence, with the latest edition of The National
Electric Code, ANSI NFPA 70 and/or The Canadian Electric Code
CSA C22.1.
HIGH VOLTAGE !
TO AVOID THE RISK OF ELECTRICAL SHOCK, WIRING TO
THE UNIT MUST BE POLARIZED AND GROUNDED .
WARNING
HIGH VOLTAGE !
TO AVOID PERSONAL INJURY OR DEATH DUE TO
ELECTRICAL SHOCK, DISCONNECT ELECTRICAL POWER
BEFORE SERVICING OR CHANGING ANY ELECTRICAL
WIRING.
CAUTION
LABEL ALL WIRES PRIOR TO DISCONNECTION WHEN SERVICING
CONTROLS . WIRING ERRORS CAN CAUSE IMPROPER AND DANGEROUS
OPERATION . VERIFY PROPER OPERATION AFTER SERVICING .
Use a separate fused branch electrical circuit containing properly
sized wire, and fuse or circuit breaker. The fuse or circuit breaker
must be sized in accordance with the maximum overcurrent protection specified on the unit rating plate. An electrical disconnect must be provided at the furnace location.
Connect hot, neutral, and ground wires as shown in the wiring diagram located on the unit’s blower door. For direct vent
applications, the cabinet opening to the junction box must be sealed air tight using either an UL approved bushing such as Heyco
Liquid Tight or by applying non-reactive UL approved sealant to bushing.
Line polarity must be observed when making field connections. Line voltage connections can be made through either the right or
left side panel. The furnace is shipped configured for a right side (left side for counterflows) electrical connection with the
junction box located inside the burner compartment. To make electrical connections through the opposite side of the furnace, the
junction box must be relocated to the other side of the burner compartment prior to making electrical connections. To relocate the
junction box, follow the steps shown below.
NOTE: Wire routing must not to interfere with circulator blower operation, filter removal, or routine maintenance.
23
JUNCTION BOX RELOCATION
WARNING
Line voltage connections can be made through either the right
or left side panel. The furnace is shipped configured for a
right side electrical connection. To make electrical connections through the opposite side of the furnace, the junction
box must be relocated to the left side prior to making electrical connections. To relocate the junction box, perform the
following steps.
EDGES OF SHEET METAL HOLES MAY BE SHARP. USE GLOVES AS A
PRECAUTION WHEN REMOVING HOLE PLUGS .
1. Remove the burner compartment door.
2. Remove and save the two screws securing the junction box
to the side panel.
3. Relocate junction box and associated plugs and grommets
to opposite side panel. Secure with screws removed in step
2.
UNIT.
To ensure proper unit grounding, the ground wire should run
from the furnace ground screw located inside the furnace junction box all the way back to the electrical panel. NOTE: Do not
use gas piping as an electrical ground. To confirm proper unit
grounding, turn off the electrical power and perform the following
check.
GROUNDED IN ACCORDANCE WITH LOCAL CODES OR IN
1. Measure resistance between the neutral (white) connection
and one of the burners.
2. Resistance should measure 10 ohms or less.
TO AVOID THE RISK OF INJURY, ELECTRICAL SHOCK OR DEATH, THE
WARNING
TO PREVENT PERSONAL INJURY OR DEATH DUE TO ELECTRIC SHOCK,
DISCONNECT ELECTRICAL POWER BEFORE INSTALLING OR SERVICING THIS
WARNING
HIGH VOLTAGE !
TO AVOID THE RISK OF INJURY, ELECTRICAL SHOCK OR
DEATH , THE FURNACE MUST BE ELECTRICALLY
THEIR ABSENCE , WITH THE LATEST EDITION OF THE
NATIONAL ELECTRIC C ODE.
WARNING
FURNACE MUST BE ELECTRICALLY GROUNDED IN ACCORDANCE WITH
LOCAL CODES OR, IN THEIR ABSENCE, WITH THE LATEST EDITION OF THE
NATIONAL ELECTRICAL CODE.
This furnace is equipped with a blower door interlock switch which
interrupts unit voltage when the blower door is opened for servicing. Do not defeat this switch.
24 VOLT THERMOSTAT WIRING
Low voltage connections can be made through either the right or
left side panel. Thermostat wiring entrance holes are located in
the blower compartment. The following figure shows connections
for a “heat/cool system”.
This furnace is equipped with a 40 VA transformer to facilitate use
with most cooling equipment. Consult the wiring diagram, located
on the blower compartment door, for further details of 115 Volt and
24 Volt wiring.
SINGLE-STAGE HEATING THERMOSTAT APPLICATION
IMPORTANT NOTE
WIRE ROUTING MUST NOT INTERFERE WITH CIRCULATOR BLOWER
OPERATION, FILTER REMOVAL OR ROUTINE MAINTENANCE.
R
Room
Thermostat
R
A single-stage thermostat with only one heating stage is needed
to control this furnace.
Y
C
Remote Condensing Unit
(Single-Stage Cooling)
Figure 28
24
Furnace Integrated
Control Module
FOSSIL FUEL APPLICATIONS
WARNING
This furnace can be used in conjunction with a heat pump in a fossil
fuel application. A fossil fuel application refers to a combined gas
furnace and heat pump installation which uses an outdoor temperature sensor to determine the most cost efficient means of
heating (heat pump or gas furnace).
HIGH VOLTAGE !
TO AVOID PERSONAL INJURY OR DEATH DUE TO
ELECTRICAL SHOCK, DISCONNECT ELECTRICAL POWER
BEFORE SERVICING OR CHANGING ANY ELECTRICAL
WIRING.
Strictly follow the wiring guidelines in the fossil fuel kit installation
instructions. All furnace connections must be made to the furnace
two-stage integrated control module and the “FURNACE” terminal strip on the fossil fuel control board.
GAS SUPPLY AND PIPING
The furnace rating plate includes the approved furnace gas input
rating and gas types. The furnace must be equipped to operate on
the type of gas applied. This includes any conversion kits required
for alternate fuels and/or high altitude.
CAUTION
TO PREVENT UNRELIABLE OPERATION OR EQUIPMENT DAMAGE , THE
GAS MANIFOLD PRESSURE MUST BE AS SPECIFIED ON THE UNIT RATING
PLATE.
ONLY MINOR ADJUSTMENTS SHOULD BE MADE BY ADJUSTING
THE GAS VALVE PRESSURE REGULATOR .
Inlet gas supply pressures must be maintained within the ranges
specified in the following table. The supply pressure must be constant and available with all other household gas fired appliances
operating. The minimum gas supply pressure must be maintained to prevent unreliable ignition. The maximum must not be
exceeded to prevent unit overfiring.
HIGH ALTITUDE DERATE
When this furnace is installed at high altitude, the appropriate High Altitude orifice kit must be applied. This is required due to the
natural reduction in the density of both the gas fuel and combustion air as altitude increases. The kit will provide the proper design
certified input rate within the specified altitude range.
High altitude kits are purchased according to the installation altitude and usage of either natural or propane gas. Consult the
furnace Specification Sheet for appropriate kits.
Do not derate the furnace by adjusting the manifold pressure to a lower pressure than specified on the furnace rating plate. The
combination of the lower air density and a lower manifold pressure will prohibit the burner orifice from drawing the proper amount of
air into the burner. This may cause incomplete combustion, flashback, and possible yellow tipping.
In some areas the gas supplier may artificially derate the gas in an effort to compensate for the effects of altitude. If the gas is
artificially derated, the appropriate orifice size must be determined based upon the BTU/ft3 content of the derated gas and the
altitude. Refer to the National Fuel Gas Code, NFPA 54/ANSI Z223.1, and information provided by the gas supplier to determine the
proper orifice size.
A different pressure switch may be required at high altitude regardless of the BTU/ft3 content of the fuel used. Consult the furnace
Specification Sheet for pressure switch.
PROPANE GAS CONVERSION
This unit is configured for natural gas. To operate this furnace
on L.P. gas, an LPM-07 LP Conversion kit must be used.
The indicated kit must be used to insure safe and proper furnace
operation. All conversions must be performed by a qualified installer, or service agency.
GAS VALVE
WARNING
POSSIBLE PROPERTY DAMAGE , PERSONAL INJURY OR DEATH MAY
OCCUR IF THE CORRECT CONVERSION KITS ARE NOT INSTALLED . THE
APPROPRIATE KITS MUST BE APPLIED TO ENSURE SAFE AND PROPER
FURNACE OPERATION .
ALL CONVERSIONS MUST BE PERFORMED BY A
QUALIFIED INSTALLER OR SERVICE AGENCY.
This unit is equipped with a 24 volt gas valve controlled during furnace operation by the integrated control module. As shipped, the
valve is configured for natural gas. The valve is field convertible for use with propane gas by replacing the regulator spring with a
propane gas spring from an appropriate manufacturer’s propane gas conversion kit. Taps for measuring the gas supply pressure and
manifold pressure are provided on the valve.
The gas valve has a manual ON/OFF control located on the valve itself. This control may be set only to the “ON” or “OFF” position.
Refer to the lighting instructions label or Startup Procedure & Adjustment for use of this control during start up and shut down
periods.
25
GAS PIPING CONNECTIONS
WARNING
The gas piping supplying the furnace must be properly sized based
on the gas flow required, specific gravity of the gas, and length of
the run. The gas line installation must comply with local codes, or
in their absence, with the latest edition of the National Fuel Gas
Code, NFPA 54/ANSI Z223.1.
To connect the furnace to the building’s gas piping, the installer
must supply a ground joint union, drip leg, manual shutoff valve,
and line and fittings to connect to gas valve. In some cases, the
installer may also need to supply a transition piece from 1/2" pipe
to a larger pipe size.
The following stipulations apply when connecting gas piping. Refer
to Gas Piping Connections figure for typical gas line connections to
the furnace.
•
Gas piping must be supported external to the furnace cabinet
so that the weight of the gas line does not distort the burner
rack, manifold or gas valve.
• Use black iron or steel pipe and fittings for building piping.
•
TO AVOID POSSIBLE UNSATISFACTORY OPERATION OF EQUIPMENT
DAMAGE DUE TO UNDERFIRING OR EQUIPMENT, USE THE PROPER SIZE
OF NATURAL /PROPANE GAS PIPING NEEDED WHEN RUNNING PIPE FROM
THE METER /TANK TO THE FURNACE.
Natural Gas Capacity of Pipe
In Cubic Feet of Gas Per Hour (CFH)
Length of
Nominal Black Pipe Size
Pipe in Feet
1/2"
3/4"
1"
1 1/4"
10
132
278
520
1050
20
92
190
350
730
30
73
152
285
590
40
63
130
245
500
50
56
115
215
440
60
50
105
195
400
70
46
96
180
370
80
43
90
170
350
90
40
84
160
320
100
38
79
150
305
(Pressure 0.5 psig or less and pressure drop of 0.3" W.C.; Based on
0.60 Specific Gravity Gas)
1 1/2"
1600
1100
980
760
670
610
560
530
490
460
BTUH Furnace Input
Where possible, use new pipe that is properly chamfered, CFH = Heating Value of Gas (BTU/Cubic Foot)
reamed, and free of burrs and chips. If old pipe is used, be
sure it is clean and free of rust, scale, burrs, chips, and old pipe
joint compound.
Use pipe joint compound on male threads ONLY. Always use pipe joint compound (pipe dope) that is APPROVED FOR ALL
GASSES. DO NOT apply compound to the first two threads.
• Use ground joint unions.
• Install a drip leg to trap dirt and moisture before it can enter the gas valve. The drip leg must be a minimum of three inches
long.
• Install a 1/8" NPT pipe plug fitting, accessible for test gauge connection, immediately upstream of the gas supply connection
to the furnace.
• Always use a back-up wrench when making the connection to the gas valve to keep it from turning. The orientation of the gas
valve on the manifold must be maintained as shipped from the factory. Maximum torque for the gas valve connection is 375
in-lbs; excessive over-tightening may damage the gas valve.
• Install a manual shutoff valve between the gas meter and unit within six feet of the unit. If a union is installed, the union must
be downstream of the manual shutoff valve, between the shutoff valve and the furnace.
• Tighten all joints securely.
• Connect the furnace to the building piping by one of the following methods:
–
–
•
•
Rigid metallic pipe and fittings.
Semi-rigid metallic tubing and metallic fittings. Aluminum alloy tubing must not be used in exterior locations. In order to
seal the grommet cabinet penetration, rigid pipe must be used to reach the outside of the cabinet. A semi-rigid connector
to the gas piping may be used from there.
Use listed gas appliance connectors in accordance with their instructions. Connectors must be fully in the same room as the
furnace.
Protect connectors and semirigid tubing against physical and thermal damage when installed. Ensure aluminum-alloy tubing
and connectors are coated to protect against external corrosion when in contact with masonry, plaster, or insulation, or
subjected to repeated wetting by liquids such as water
(except rain water), detergents, or sewage.
26
Alternate
Gas Line
Location
Manifold
Manual Shut Off Valve
(upstream from ground joint pipe union)
Manual Shut Off Valve
(upstream from
ground joint
pipe union)
Burners
Gas Valve
*Ground
Joint
Pipe
Union
*Ground
Joint
Pipe
Union
Alternate
Gas Line
Location
*Ground
Joint
Pipe Union
*Ground
Joint
Pipe Union
Grommet
in Standard
Gas Line
Hole
Drip Leg
Grommet
in Standard
Gas Line
Hole
Plug in
Alternate
Gas Line
Hole
Drip Leg
*NOTE: Union may be inside furnace cabinet where allowed by local codes.
Gas Valve
Burners
UPFLOW
Figure 29
*NOTE: Union may be inside furnace cabinet where allowed by local codes.
COUNTERFLOW
Figure 30
Alternate
Union
Location
Grommet in
Standard Gas Line Hole
Manual Shut Off Valve
(upstream from
ground joint pipe union)
Manual Shut Off Valve
(upstream from
ground joint
pipe union)
Drip Leg
Plug in Alternate Gas Line Hole
Burners
Manifold
Gas
Valve
Plug in Main Gas Line Hole
Drain Trap
UPFLOW - HORIZONTAL LEFT
Figure 31
COUNTERFLOW - HORIZONTAL RIGHT
Figure 32
Gas Piping Connections
The gas piping may enter the left or right side of the furnace cabinet. The installer must supply rigid pipe long enough to reach the outside of the cabinet to seal the grommet cabinet
penetration. A semi-rigid connector to the gas piping can be used outside the cabinet per local codes. 1/2” NPT pipe and
fittings are required. For models with an “L” shaped manifold, a 4 1/2” long nipple is required. For models with a hook
shaped manifold, a 2” long nipple is required.
A semi-rigid connector to the gas piping can be used outside the cabinet per local codes. From the elbow, the length of
pipe and the fittings required will vary by the side chosen, location of union and cabinet width. The union may be placed
inside or outside of the cabinet.
27
GAS PIPING CHECKS
Before placing unit in operation, leak test the unit and gas connections.
Check for leaks using an approved chloride-free soap and water
solution, an electronic combustible gas detector, or other approved
testing methods.
WARNING
TO AVOID THE POSSIBILITY OF EXPLOSION OR FIRE, NEVER USE A MATCH
OR OPEN FLAME TO TEST FOR LEAKS.
NOTE: Never exceed specified pressures for testing. Higher pressure may damage the gas valve and cause subsequent overfiring,
resulting in heat exchanger failure.
Disconnect this unit and shutoff valve from the gas supply piping system before pressure testing the supply piping system with
pressures in excess of 1/2 psig (3.48 kPa).
Isolate this unit from the gas supply piping system by closing its external manual gas shutoff valve before pressure testing supply
piping system with test pressures equal to or less than 1/2 psig (3.48 kPA).
PROPANE GAS TANKS AND PIPING
A gas detecting warning system is the only reliable way to detect a
propane gas leak. Rust can reduce the level of odorant in propane
gas. Do not rely on your sense of smell. Contact a local propane
gas supplier about installing a gas detecting warning system. If the
presence of gas is suspected, follow the instructions listed in the
Safety Precautions section of this manual.
All propane gas equipment must conform to the safety standards
of the National Board of Fire Underwriters, NBFU Manual 58.
For satisfactory operation, propane gas pressure must be 10” WC
at the furnace manifold with all gas appliances in operation. Maintaining proper gas pressure depends on three main factors:
1. Vaporization rate, depending on temperature of the liquid,
and “wetted surface” area of the container or containers.
2. Proper pressure regulation. (Two-stage regulation is
recommended for both cost and efficiency).
3. Pressure drop in lines between regulators, and between
second stage regulator and the appliance. Pipe size will
depend on length of pipe run and total load of all appliances.
WARNING
IF THE GAS FURNACE IS INSTALLED IN A BASEMENT , AN EXCAVATED
AREA OR CONFINED SPACE , IT IS STRONGLY RECOMMENDED TO
CONTACT A PROPANE SUPPLIER TO INSTALL A GAS DETECTING WARNING
DEVICE IN CASE OF A GAS LEAK.
• SINCE PROPANE GAS IS HEAVIER THAN AIR , ANY LEAKING GAS CAN
SETTLE IN ANY LOW AREAS OR CONFINED SPACES.
• PROPANE GAS ODORANT MAY FADE , MAKING THE GAS UNDETECTABLE
EXCEPT WITH A WARNING DEVICE .
5 to 15 PSIG
(20 PSIG Max.)
First Stage
Regulator
200 PSIG
Maximum
Continuous
11" W.C.
Second Stage
Regulator
Complete information regarding tank sizing for vaporization, recommended regulator settings, and pipe sizing is available from
most regulator manufacturers and propane gas suppliers.
Since propane gas will quickly dissolve white lead and most standard commercial compounds, special pipe dope must be used.
Always use a pipe thread sealant approved for all gases.
Refer to the illustration at right for typical propane gas installations and piping.
28
Propane Gas Installation (Typ.)
Figure 33
Sizing Between Second or Second Stage Regulator & Appliance*
Sizing Between First and Second Stage Regulator*
Maximum Propane Capacities listed are based on 1/2” W.C. pressure drop at 11” W.C. setting.
Maximum Propane Capacities listed are based on 2 psig pressure drop at 10 psig setting.
Capacities in 1,000 BTU/hour.
Pipe or
Tubing
Length
Feet
10
20
30
40
50
60
80
100
125
150
175
200
Nominal Pipe Size
Schedule 40
Tubing Size, O.D. Type L
3/8"
730
500
400
370
330
300
260
220
200
190
170
160
1/2"
1,700
1,100
920
850
770
700
610
540
490
430
400
380
5/8"
3,200
220
2,000
1,700
1,500
1,300
1,200
1,000
900
830
780
730
3/4"
5,300
3,700
2,900
2,700
2,400
2,200
1,900
1,700
1,400
1,300
1,200
1,100
Capacities in 1,000 BTU/hour.
7/8"
8,300
5,800
4,700
4,100
3,700
3,300
2,900
2,600
2,300
2,100
1,900
1,800
1/2"
3,200
2,200
1,800
1,600
1,500
1,300
1,200
1,000
900
830
770
720
3/4"
7,500
4,200
4,000
3,700
3,400
3,100
2,600
2,300
2,100
1,900
1,700
1,500
To convert to capacities at 15 psig settings - multiply by 1.130
To convert to capacities at 5 psig settings - multiply by 0.879
Pip e o r
Tu bin g
Len gt h
F eet
3/8"
1/2"
5/8"
3/4"
7 /8"
1/2"
3/4"
10
20
39
26
92
62
199
131
3 29
2 16
501
346
275
189
567
393
30
40
50
21
19
18
50
41
37
107
90
79
1 81
1 45
1 31
277
233
198
152
129
114
315
267
237
590
504
448
1,212
1,039
913
1,858
1,559
1,417
60
80
16
13
35
29
72
62
1 21
1 04
187
155
103
89
217
185
409
346
834
724
1,275
1,066
100
125
150
11
10
9
26
24
21
55
48
43
90
81
72
138
122
109
78
69
63
162
146
132
307
275
252
630
567
511
976
866
787
200
8
19
39
66
100
250
8
17
36
60
93
*Data in ac cor danc e wit h NFP A pamphl et No. 54
54
48
112
100
209
185
439
390
665
590
Nom inal P ipe Siz e
S chedu le 40
T ub ing S iz e, O .D. T yp e L
Propane Gas Piping Chart I
1"
1- 1/4" 1- 1/2"
1,07 1 2,205
732
1,496
3,307
2,299
Propane Gas Piping Chart II
CIRCULATING AIR & FILTERS
DUCT WORK - AIR FLOW
WARNING
Duct systems and register sizes must be properly designed for the
CFM and external static pressure rating of the furnace. Design the
ductwork in accordance with the recommended methods of “Air
Conditioning Contractors of America” Manual D.
NEVER ALLOW THE PRODUCTS OF COMBUSTION, INCLUDING CARBON
MONOXIDE, TO ENTER THE RETURN DUCT WORK OR CIRCULATION AIR
SUPPLY.
Install the duct system in accordance with Standards of the National Board of Fire Underwriters for the Installation of Air Conditioning,
Warm Air Heating and Ventilating Systems. Pamphlets No. 90A and 90B.
A closed return duct system must be used, with the return duct connected to the furnace. NOTE: Ductwork must never be attached
to the back of the furnace. For upflow installations requiring 1800 CFM or more, use either two side returns or bottom return or a
combination of side /bottom. Flexible joints may be used for supply and return connections to reduce noise transmission. To prevent
the blower from interfering with combustion air or draft when a central return is used, a connecting duct must be installed between
the unit and the utility room wall. Never use a room, closet, or alcove as a return air chamber.
CHECKING DUCT STATIC
Refer to your furnace rating plate for the maximum ESP (external duct static) rating.
Total external static refers to everything external to the furnace cabinet. Cooling coils, filters, ducts, grilles, registers must
all be considered when reading your total external static pressure. The supply duct pressure must be read between the
furnace and the cooling coil. This reading is usually taken by removing the “A” shaped block off plate from the end on the
coil; drilling a test hole in it and reinstalling the block off plate. Take a duct static reading at the test hole. Tape up the test
hole after your test is complete. The negative pressure must be read between the filter and the furnace blower.
Too much external static pressure will result in insufficient air that can cause excessive temperature rise. This can cause
limit switch tripping and heat exchanger failure.
To determine total external duct static pressure, proceed as follows;
1. With clean filters in the furnace, use a draft gauge (inclined manometer) to measure the static pressure of the return
duct at the inlet of the furnace. (Negative Pressure)
2. Measure the static pressure of the supply duct. (Positive Pressure)
3. The difference between the two numbers is .4” w.c.
29
Example:
static reading from return duct = -.1" w.c.
static reading from supply duct = .3" w.c.
total external static pressure on this system = .4" w.c.
NOTE: Both readings may be taken simultaneously and read directly on
the manometer if so desired. If an air conditioner coil or Electronic Air
Cleaner is used in conjunction with the furnace, the readings must also
include theses components, as shown in the following drawing.
4. Consult proper tables for the quantity of air.
If the total external static pressure exceeds the maximum listed on the
furnace rating plate, check for closed dampers, registers, undersized
and/or oversized poorly laid out duct work.
The temperature rise of the furnace must be within the temperature rise
range listed on the furnace rating plate.
BOTTOM RETURN AIR OPENING [UPFLOW MODELS]
Checking Static Pressure
(80% Furnace Shown, 90% Similar)
Figure 34
The bottom return air opening on upflow models utilizes a “lance
WARNING
and cut” method to remove sheet metal from the duct opening in
the base pan. To remove, simply press out the lanced sections by
EDGES OF SHEET METAL HOLES MAY BE SHARP. USE GLOVES AS A
hand to expose the metal strips retaining the sheet metal over the
PRECAUTION WHEN REMOVING SHEET METAL FROM RETURN AIR
duct opening. Using tin snips, cut the metal strips and remove the
OPENINGS.
sheet metal covering the duct opening. In the corners of the
opening, cut the sheet metal along the scribe lines to free the duct
flanges. Using the scribe line along the duct flange as a guide, unfold CUT USING TIN SNIPS
the duct flanges around the perimeter of the opening using a pair of
PRESS OUT BY HAND
seamer pliers or seamer tongs. NOTE: Airflow area will be reduced by
approximately 18% if duct flanges are not unfolded. This could cause
performance issues and noise issues.
When the furnace is used in connection with a cooling unit, the furnace should be installed in parallel with or on the upstream side of the
cooling unit to avoid condensation in the heating element. With a
parallel flow arrangement, the dampers or other means used to control
the flow of air must be adequate to prevent chilled air from entering
the furnace and, if manually operated, must be equipped with means
to prevent operation of either unit unless the damper is in the full heat
or cool position.
CUT FOUR CORNERS
AFTER REMOVING SHEET
METAL
SCRIBE LINES OUTLINING
DUCT FLANGES
Duct Flange Cut Outs
Figure 35
When the furnace is installed without a cooling coil, it is recommended that a removable access panel be provided in the outlet air
duct. This opening shall be accessible when the furnace is installed and shall be of such a size that the heat exchanger can be viewed
for visual light inspection or such that a sampling probe can be inserted into the airstream. The access panel must be made to
prevent air leaks when the furnace is in operation.
When the furnace is heating, the temperature of the return air entering the furnace must be between 55°F and 100°F.
FILTERS - READ THIS SECTION BEFORE INSTALLING THE RETURN AIR DUCT WORK
Filters must be used with this furnace. Discuss filter maintenance with the building owner. Filters do not ship with this furnace, but
must be provided, sized and installed externally by the installer. Filters must comply with UL900 or CAN/ULCS111 standards. If the
furnace is installed without filters, the warranty will be voided.
On upflow units, guide dimples locate the side return cutout locations. Use a straight edge to scribe lines connecting the dimples. Cut
out the opening on these lines. NOTE: An undersized opening will cause reduced airflow.
Refer to the Filter Sizing Chart to determine filter area requirements.
30
92% Upflow
96% Upflow
Filter Sizing Chart
Filter Sizing Chart
Model
Minimum
Minimum
Model
Filter Size
Filter Size
*MSS920402BNA*
14 X 25
*MSS960402BNA*
14 X 30
*MSS920603BNA*
20 X 24
*MSS960603BNA*
20 X 25
*MSS920803BNA*
18 X 36
*MSS960803BNA*
18 X 36
*MSS920804CNA*
18 X 36
*MSS960804CNA*
2 (14 X 30)
*MSS920805CNA*
2 (16 X 25)
*MSS960805CNA*
2 (14 X 30)
*MSS921004CNA*
2 (16 X 25)
*MSS961005CNA*
2 (16 X 30)
*MSS921005CNA*
2 (16 X 25)
*MSS961205DNA*
2 (20 X 25)
*MSS921205DNA*
2 (20 X 24)
96% Counterflow
Filter Sizing Chart
92% Counterflow
Filter Sizing Chart
*CSS960402BNA*
18 X 24
*CSS920402BNA*
12 X 30
*CSS960603BNA*
20 X 25
*CSS920603BNA*
20 X 25
*CSS960804CNA*
24 X 30
*CSS920804CNA*
18 X 36
*CSS961005CNA*
2 (16 X 25)
*CSS921005CNA*
2 (14 X 30)
*CSS961205DNA*
2 (18 X 24)
Based on 300 ft/min filter face velocity
Change filters before occupants take ownership of a new home!
UPRIGHT INSTALLATIONS
Depending on the installation and/or customer preference, differing filter arrangements can be applied. Filters can be installed in the
central return register or a side panel external filter rack kit (upflows). As an alternative a media air filter or electronic air cleaner can
be used as the requested filter.
The following figures shows possible filter locations.
FI
CENTRAL
RETURN
GRILLE
RETURN
DUCT
CENTRAL
RETURN
GRILLE
FILTER
SUPPORT
BRACKET
(Field Supplied)
FILTER
FILTER
ER
LT
SIDE RETURN
EXTERNAL FILTER
RACK KIT
(EITHER SIDE)
FI
LT
E
R
FILTER
ACCESS
DOOR
AIR FLOW
AIR FLOW
Possible Upright Upflow
Figure 36
Possible Upright Counterflow
Filter Locations
Figure 37
31
HORIZONTAL INSTALLATIONS
Filters must be installed in either the central return register or in the return air duct work.
STARTUP PROCEDURE & ADJUSTMENT
Furnace must have a 115 VAC power supply properly connected and grounded. Proper polarity must be maintained for correct
operation. In addition to the following start-up and adjustment items, refer to further information in Operational Checks section.
DRAIN TRAP PRIMING
The drain trap MUST be primed prior to furnace startup. To prime, fill both sides of the drain trap with water. This ensures proper
furnace drainage upon startup and prohibits the possibility of flue gases escaping through the drain system.
FURNACE OPERATION
Purge gas lines of air prior to startup. Be sure not purge lines into an enclosed burner compartment.
Check for leaks using an approved chloride-free soap and water solution, an electronic combustible gas detector, or other approved
method. Verify that all required kits (propane gas, high altitude, etc.) have been appropriately installed.
FURNACE STARTUP
1.
2.
3.
4.
Close the manual gas shutoff valve external to the furnace.
Turn off the electrical power to the furnace.
Set the room thermostat to the lowest possible setting.
Remove the burner compartment door.
NOTE: This furnace is equipped with an ignition device which automatically lights the burner. Do not try to light the burner by hand.
5. Move the furnace gas valve manual control to the OFF position.
6. Wait five minutes then smell for gas. Be sure check near the floor as some types of gas are heavier than air.
7. If you smell gas after five minutes, immediately follow the
Safety Instructions on page 3 of this manual. If you do not
smell gas after five minutes, move the furnace gas valve
CAUTION
manual control to the ON position.
TO PREVENT UNRELIABLE OPERATION OR EQUIPMENT DAMAGE , THE
8. Replace the burner compartment door.
INLET GAS SUPPLY PRESSURE MUST BE AS SPECIFIED ON THE UNIT
9. Open the manual gas shutoff valve external to the furnace.
RATING PLATE WITH ALL OTHER HOUSEHOLD GAS FIRED APPLIANCES
10. Turn on the electrical power to the furnace.
OPERATING.
11. Adjust the thermostat to a setting above room temperature.
12. After the burners are lit, set the thermostat to desired
temperature.
FURNACE SHUTDOWN
1. Set the thermostat to the lowest setting.
The integrated control will close the gas valve and extinguish flame. Following a 15 second delay, the induced draft blower will
be de-energized. The indoor blower will shut down when the time delay expires (selectable on 96% models).
2. Remove the burner compartment door and move the furnace gas valve manual control to the OFF position.
3. Close the manual gas shutoff valve external to the furnace.
4. Replace the burner compartment door.
GAS SUPPLY PRESSURE MEASUREMENT
GAS PRESSURE TEST
The line pressure supplied to the gas valve must be within the range specified below. The supply pressure can be measured at the gas
valve inlet pressure tap or at a hose fitting installed in the gas piping drip leg. The supply pressure must be measured with the burners
operating. To measure the gas supply pressure, use the following procedure.
32
Gas Valve ON/OFF Selector Switch
Inlet Pressure
OUTLET
Regulator
Cover Screw
INLET
OUTLET
INLET
Outlet Pressure
White-Rodgers Model 36J22
Figure 38A
White-Rodgers Model 36J22
Connected to Manometer
Figure 38B
1. Turn OFF gas to furnace at the manual gas shutoff valve
external to the furnace.
2. Connect a calibrated water manometer (or appropriate gas
pressure gauge) at either the gas valve inlet pressure tap or
the gas piping drip leg. See White-Rodgers 36J22 gas valve
figure for location of inlet pressure tap.
NOTE: If measuring gas pressure at the drip leg, a field-supplied hose barb fitting must be installed prior to making the hose
connection. If using the inlet pressure tap on the White-Rodgers 36J22 gas valve, then use the 36G/J Valve Pressure Check Kit, Part
No. 0151K00000S.
3. Turn ON the gas supply and operate the furnace and all other gas consuming
appliances on the same gas supply line.
4. Measure furnace gas supply pressure with burners firing. Supply pressure
must be within the range specified in the Inlet Gas Supply Pressure table.
Gas
Natural
Manifold Gas Pressure
Range
Nominal
3.2 - 3.8" w.c.
3.5" w.c.
Propane
9.7 - 10.3" w.c.
10.0" w.c.
If supply pressure differs from table, make the necessary adjustments to pressure regulator, gas piping size, etc., and/or consult with local gas utility.
5. Turn OFF gas to furnace at the manual shutoff valve and disconnect manometer. Reinstall plug before turning on gas to
furnace.
6. Turn OFF any unnecessary gas appliances stated in step 3.
Gas Line
GAS MANIFOLD PRESSURE MEASUREMENT AND ADJUSTMENT
Only small variations in gas pressure should be made by adjusting the gas valve
pressure regulator. The manifold pressure must be measured with the burners
operating. To measure and adjust the manifold pressure, use the following procedure.
1. Turn OFF gas to furnace at the manual gas shutoff valve external to the
furnace.
2. Turn off all electrical power to the system.
3. Outlet pressure tap connections:
White-Rodgers 36J22 valve: Back outlet pressure test screw (inlet/outlet
pressure tap) out one turn (counterclockwise, not more than one turn).
4. Attach a hose and manometer to the outlet pressure tap (White-Rodgers
valve).
5. Turn ON the gas supply.
6. Turn on power and close thermostat “R” and “W” contacts to provide a call for
heat.
7. Measure the gas manifold pressure with burners firing. Adjust
manifold pressure using the Manifold Gas Pressure table shown
on this page.
Gas
Shutoff
Valve
Gas Line
To Furnace
Open To
Atmosphere
Drip Leg Cap
With Fitting
Manometer Hose
Manometer
Measuring Inlet Gas Pressure (Alt. Method)
Figure 39
CAUTION
TO PREVENT UNRELIABLE OPERATION OR EQUIPMENT DAMAGE , THE
INLET GAS SUPPLY PRESSURE MUST BE AS SPECIFIED ON THE UNIT
RATING PLATE WITH ALL OTHER HOUSEHOLD GAS FIRED APPLIANCES
OPERATING.
33
8. Remove regulator cover screw from the outlet pressure regulator adjust tower and turn screw clockwise to increase pressure
or counterclockwise to decrease pressure. Replace regulator cover screw.
9. Turn off all electrical power and gas supply to the system.
10. Remove the manometer hose from the hose barb fitting or outlet pressure tap.
11. Replace outlet pressure tap: White-Rodgers 36J22 valve: Turn outlet pressure test screw in to seal pressure port (clockwise,
7 in-lb minimum).
12. Turn on electrical power and gas supply to the system.
13. Close thermostat contacts “R” and “W” to energize the valve.
Using a leak detection solution or soap suds, check for leaks at outlet or screw (White-Rodgers valve). Bubbles forming indicate a
leak. SHUT OFF GAS AND REPAIR ALL LEAKS IMMEDIATELY!
NOTE: For gas to gas conversion, consult your dealer for appropriate conversion.
GAS INPUT RATE MEASUREMENT (NATURAL GAS ONLY)
The actual gas input rate to the furnace must never be greater than that specified on the unit rating plate. To measure natural gas
input using the gas meter, use the following procedure.
1. Turn OFF the gas supply to all other gas-burning appliances except the furnace.
2. While the furnace is operating at high fire rate, time and record one complete revolution of the gas meter dial, measuring
the smallest quantity, usually the dial that indicates 1/2 cu. ft. per revolution. You will use this number to calculate the
quantity of gas in cubic ft. if the furnace would consume if it ran steadily for one hour (3600 seconds).
3. If the 1/2 cu. ft. dial was used, multiply your number x 2.
EXAMPLE: If it took 23 seconds to complete one revolution of the 1/2 ft. dial (23 x 2 = 46).
This tells us that at this rate, it would take 46 seconds to consume one cu. ft. of gas. 3600 / 46 = 78.
This tells us that in one hour, the furnace would consume 78 cu. ft. of gas.
The typical value range for 1 cu. ft. of natural gas is around 1000 BTU. Check with your gas utility, if possible. In this
example, the furnace is consuming 78,000 BTUH.
NOTE: The final manifold pressure cannot vary by more than ± 0.3” w.c. for Natural and + 0.5” for LP from the specified
setting. Consult your local gas supplier if additional input rate adjustment is required.
4. Turn ON gas to and relight all other appliances turned off in step 1. Be certain that all appliances are functioning properly and
that all pilot burners are operating.
TEMPERATURE RISE
Temperature rise must be within the range specified on the unit rating
plate. An incorrect temperature rise may result in condensing in or
overheating of the heat exchanger. An airflow and temperature rise
table is provided in the Specification Sheet applicable to your model.
Determine and adjust temperature rise as follows:
1. Operate furnace with burners firing for approximately ten
minutes. Ensure all registers are open and all duct dampers
are in their final (fully or partially open) position.
2. Place thermometers in the return and supply ducts as close to
the furnace as possible. Thermometers must not be influenced
by radiant heat by being able to “see” the heat exchanger.
3. Subtract the return air temperature from the supply air temperature
to determine the air temperature rise. Allow adequate time for
thermometer readings to stabilize.
4. Adjust temperature rise by adjusting the circulator blower speed.
Increase blower speed to reduce temperature rise. Decrease blower
speed to increase temperature rise. Refer to Startup Procedure
and Adjustment -Circulator Blower Speeds for speed changing
details.
34
SUPPLY
AIR
RETURN
AIR
Temperature Rise Measurement
Figure 40
CIRCULATOR BLOWER SPEEDS
This furnace is equipped with a multi-speed circulator blower. This blower provides ease in adjusting blower speeds. The Specification Sheet applicable to your model provides an airflow table, showing the relationship between airflow (CFM) and external static
pressure (E.S.P.), for the proper selection of heating and cooling
speeds.
1. Determine the tonnage of the cooling system installed with
WARNING
the furnace. If the cooling capacity is in BTU/hr divide it by
12,000 to convert capacity to tons.
TO AVOID PERSONAL INJURY OR DEATH DUE TO ELECTRICAL SHOCK,
Example: Cooling Capacity of 30,000 BTU/hr.
TURN OFF POWER TO THE FURNACE BEFORE CHANGING SPEED TAPS.
30,000/12,000 = 2.5 Tons
2. Determine the proper air flow for the cooling system. Most
cooling systems are designed to work with air volume between 350 and 450 CFM per ton. Most manufacturers recommend an
air flow of about 400 CFM per ton.
Example: 2.5 tons X 400 CFM per ton = 1000 CFM
3. Select the heating speed for your model from the heating speed chart in the Specification Sheet. The selected speed must
provide a temperature rise within the rise range listed with the particular model.
To adjust the circulator blower speed, proceed as follows:
1. Turn OFF power to the furnace.
2. Select the heating and cooling blower speeds that match the installation requirements from the airflow table in the
Specification Sheet.
3. Relocate desired motor leads to the circulator blower heat and cool speed terminals on the integrated control module.
(Terminals are identified as HEAT and COOL). If heating and cooling blower speeds are the same, a jumper wire must
be used between the heat and cool terminals.
4. Connect all unused blower motor leads to the “PARK” terminals on the integrated control module. Any leads not
connected to the “PARK” terminals must be taped.
5. Turn ON power to furnace.
6. Verify proper temperature rise as outlined in the Temperature Rise section of Startup Procedure and Adjustment.
In general lower heating speeds will: reduce electrical consumption, lower operating sound levels of the blower, and increase the outlet
air temperature delivered to the home. The speeds available allow the blower performance to be optimized for the particular
homeowner’s needs.
BLOWER HEAT OFF DELAY TIMINGS
The integrated control module on 96% models provides a selectable heat off delay function. The heat off delay period may be set to
100 or 150 seconds by cutting the jumper on the control module. The delay is factory shipped at 150 seconds but may be changed
to suit the installation requirements and/or homeowner preference.
The integrated control board on 92% models has a fixed blower off delay of 150 seconds.
NORMAL SEQUENCE OF OPERATION
POWER UP
The normal power up sequence is as follows:
•
115 VAC power applied to furnace.
•
Integrated control module performs internal checks.
•
LED will flash once at power up then remain on.
•
Integrated control module monitors safety circuits continuously.
•
Furnace awaits call from thermostat.
HEATING MODE
The normal operational sequence in heating mode is as follows:
•
R and W thermostat contacts close, initiating a call for heat.
•
Integrated control module performs safety circuit checks.
•
Induced draft blower is energized for a 15-second prepurge.
•
Pressure switch contacts are closed.
35
•
•
•
•
•
•
•
•
•
•
Igniter warm up begins upon presence of closed pressure switch contacts.
Gas valve opens at end of igniter warm up period, delivering gas to burners and establishing flame.
Integrated control module monitors flame presence. Gas valve will remain open only if flame is detected.
Circulator blower is energized on heat speed following a thirty (30) second blower on delay.
Furnace runs, integrated control module monitors safety circuits continuously.
R and W thermostat contacts open, completing the call for heat.
Gas valve closes, extinguishing flame.
Induced draft blower is de-energized following a fifteen second post purge.
For 96% Models: Circulator blower continues running for the selected heat off delay period Factory set at 150
seconds.
For 92% Models: The blower off delay is 150 seconds (non-adjustable).
Furnace awaits next call from thermostat.
COOLING MODE
The normal operational sequence in cooling mode is as follows:
• R,Y, G thermostat thermostat contacts close, initiating a call for cool.
• Integrated control module performs safety circuit checks.
• Outdoor fan and compressor are energized.
• Circulator blower is energized on the cool speed.
• Furnace circulator blower and outdoor cooling unit run their appropriate speeds, integrated control module monitors
safety circuits continuously.
• R,Y, G thermostat contacts open, completing the call for cool.
• Outdoor fan and compressor are de-energized.
• Circulator blower continues running during a cool off delay period of 45 seconds.
• Furnace awaits next call from thermostat.
FAN ONLY MODE
The normal operational sequence in fan only mode is as follows:
• R and G thermostat contacts close, initiating a call for fan.
• Integrated control module performs safety circuit checks.
• Circulator blower is energized on heat speed.
• Circulator blower runs, integrated control module monitors safety circuits continuously.
• R and G thermostat contacts open, completing the call for fan.
• Circulator blower is de-energized.
• Furnace awaits next call from thermostat.
OPERATIONAL CHECKS
The burner flames should be inspected with the burner compartment door installed. Flames should be stable, quiet, soft, and blue
(dust may cause orange tips but they must not be yellow). Flames should extend directly outward from the burners without curling,
floating, or lifting off. Flames must not impinge on the sides of the heat exchanger firing tubes.
SAFETY CIRCUIT DESCRIPTION
A number of safety circuits are employed to ensure safe and proper furnace operation. These circuits serve to control any potential
safety hazards and serve as inputs in the monitoring and diagnosis of abnormal function. These circuits are continuously monitored
during furnace operation by the integrated control module.
INTEGRATED CONTROL MODULE
The integrated control module is an electronic device which, if a potential safety concern is detected, will take the necessary
precautions and provide diagnostic information through an LED.
36
PRIMARY LIMIT
The primary limit control is located on the partition panel and monitors heat exchanger compartment temperatures. It is a normallyclosed (electrically), automatic reset, temperature-activated sensor. The limit guards against overheating as a result of insufficient
conditioned air passing over the heat exchanger.
AUXILIARY LIMIT
The auxiliary limit controls are located on or near the circulator blower and monitors blower compartment temperatures. They are
a normally-closed (electrically), manual-reset sensors. These limits guard against overheating as a result of insufficient conditioned
air passing over the heat exchanger.
ROLLOUT LIMIT
The rollout limit controls are mounted on the burner/manifold assembly and monitor the burner flame. They are normally-closed
(electrically), manual-reset sensors. These limits guard against burner flames not being properly drawn into the heat exchanger.
PRESSURE SWITCHES
The pressure switches are normally-open (closed during operation) negative air pressure-activated switches. They monitor the
airflow (combustion air and flue products) through the heat exchanger via pressure taps located on the induced draft blower and the
coil front cover. These switches guard against insufficient airflow (combustion air and flue products) through the heat exchanger
and/or blocked condensate drain conditions.
FLAME SENSOR
The flame sensor is a probe mounted to the burner/manifold assembly which uses the principle of flame rectification to determine
the presence or absence of flame.
TROUBLESHOOTING
ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS
NOTE: Discharge body’s static electricity before touching unit. An electrostatic discharge can adversely affect electrical components.
Use the following precautions during furnace installation and servicing to protect the integrated control module from damage. By
putting the furnace, the control, and the person at the same electrostatic potential, these steps will help avoid exposing the
integrated control module to electrostatic discharge. This procedure is applicable to both installed and uninstalled (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 furnace away from the control. Any tools held in a person’s hand during
grounding will be discharged.
3. Service integrated control module or connecting wiring following the discharge process in step 2. Use caution not to recharge
your body with static electricity; (i.e., do not move or shuffle your feet, do not touch ungrounded objects, etc.). If you come
in contact with an ungrounded object, repeat step 2 before touching control or wires.
4. Discharge your body to ground before removing a new control from its container. Follow steps 1 through 3 if installing the
control on a furnace. Return any old or new controls to their containers before touching any ungrounded object.
DIAGNOSTIC CHART
Refer to the Diagnostic Codes chart for assistance in determining the source of unit operational problems.
FAULT RECALL (96% Models Only)
The last five fault codes stored can be displayed on the diagnostic LED. When the control is in standby mode (no call for
heat or cool), press the FAULT RECALL switch for approximately two seconds or until the diagnostic LED turns off. Release
the switch and the LED will remain off for two seconds. Then the fault codes will display beginning with the most recent
fault first with a two second pause between codes. After the stored fault codes have all displayed, the LED will remain off
for two seconds and then turn on to indicate return to normal status. While displaying the stored fault codes, the control will
ignore any new call for heat, cool or fan.
FAULT CODE RESET (96% Models Only)
The stored fault codes can be erased from memory. When the control is in standby mode (no call for heat or cool), press the
FAULT RECALL switch for five to ten seconds or until the diagnostic LED begins to rapid flash. When the switch is released,
the LED will turn off for two seconds to indicate the codes are erased. After two seconds the LED will turn on to indicate
return to normal status. If the switch is held pressed for over ten seconds the rapid flash will stop and the LED will be on to
indicate return to normal status.
37
RESETTING FROM LOCKOUT
Furnace lockout results when a furnace is unable to achieve ignition after three attempts during a single call for heat. It is
characterized by a non-functioning furnace and a fault code displayed. If the furnace is in “lockout”, it will (or can be) reset in any
of the following ways.
1. Automatic reset. The integrated control module will automatically reset itself and attempt to resume normal operations
following a one hour lockout period.
2. Manual power interruption. Interrupt 115 volt power to the furnace.
3. Manual thermostat cycle. Lower the thermostat so that there is no longer a call for heat for 1 -20 seconds then reset to
previous setting.
NOTE: If the condition which originally caused the lockout still exists, the control will return to lockout. Refer to the Troubleshooting
Chart for aid in determining the cause.
MAINTENANCE
ANNUAL INSPECTION
The furnace should be inspected by a qualified installer, or service agency at least once per year. This check should be performed at
the beginning of the heating season. This will ensure that all furnace components are in proper working order and that the heating
system functions appropriately. Pay particular attention to the following items. Repair or service as necessary.
WARNING
•
Flue pipe system. Check for blockage and/or leakage. Check
the outside termination and the connections at and internal
HIGH VOLTAGE !
to the furnace.
TO AVOID PERSONAL INJURY OR DEATH DUE TO
•
Heat exchanger. Check for corrosion and/or buildup within
ELECTRICAL SHOCK, DISCONNECT ELECTRICAL POWER
the heat exchanger passageways.
BEFORE PERFORMING ANY SERVICE OR MAINTENANCE.
•
Burners. Check for proper ignition, burner flame, and flame
sense.
•
Drainage system. Check for blockage and/or leakage. Check hose connections at and internal to furnace.
•
Wiring. Check electrical connections for tightness and/or corrosion. Check wires for damage.
•
Filters.
FILTERS
FILTER MAINTENANCE
Improper filter maintenance is the most common cause of inadequate heating or cooling performance. Filters should be cleaned
(permanent) or replaced (disposable) every two months or as required. When replacing a filter, it must be replaced with a filter of the
same type and size.
DIAGNOSTIC CODES
1 flash, then pause
2 flashes, then pause
3 flashes, then pause
4 flashes, then pause
5 flashes, then pause
System lockout
Pressure switch stuck closed
Pressure switch stuck open
Open limit switch
Flame has been sensed when no flame
should be present (no call for heat)
6 flashes, then pause
Open rollout switch
7 flashes, then pause
Low flame sense signal
8 flashes, then pause
Igniter relay fault
Continuous flashing
115 Volt AC power reversed
OFF
Control failure
ON
Normal operation
The LED will also flash once at power-up.
38
FILTER REMOVAL
Depending on the installation, differing filter arrangements can be applied. Filters can be installed in either the central return
register or a side panel external filter rack (upflow only). A media air filter or electronic air cleaner can be used as an alternate filter.
Follow the filter sizes given in the Recommended Minimum Filter size table to ensure proper unit performance.
To remove filters from an external filter rack in an upright upflow installation, follow the directions provided with external filter rack
kit.
HORIZONTAL UNIT FILTER REMOVAL
Filters in horizontal installations are located in the central return register or the ductwork near the furnace.
To remove:
1. Turn OFF electrical power to furnace.
2. Remove filter(s) from the central return register or ductwork.
3. Replace filter(s) by reversing the procedure for removal.
4. Turn ON electrical power to furnace.
MEDIA AIR FILTER OR ELECTRONIC AIR CLEANER REMOVAL
Follow the manufacturer’s directions for service.
BURNERS
Visually inspect the burner flames periodically during the heating season. Turn on the
furnace at the thermostat and allow several minutes for flames to stabilize, since any
dislodged dust will alter the flames normal appearance. Flames should be stable, quiet,
soft, and blue (dust may cause orange tips but they must not be yellow). They should
extend directly outward from the burners without curling, floating, or lifting off. Flames
must not impinge on the sides of the heat exchanger firing tubes.
INDUCED DRAFT AND CIRCULATOR BLOWERS
The bearings in the induced draft blower and circulator blower motors are permanently
lubricated by the manufacturer. No further lubrication is required. Check motor windings
for accumulation of dust which may cause overheating. Clean as necessary.
Burner Flame
Figure 41
CONDENSATE TRAP AND DRAIN SYSTEM (QUALIFIED SERVICER ONLY)
Annually inspect the drain tubes, drain trap, and field-supplied drain line for proper condensate drainage. Check drain system for
hose connection tightness, blockage, and leaks. Clean or repair as necessary.
FLAME SENSOR (QUALIFIED SERVICER ONLY)
Under some conditions, the fuel or air supply can create a nearly invisible coating on the flame sensor. This coating acts as an
insulator causing a drop in the flame sense signal. If the flame sense signal drops too low the furnace will not sense flame and will lock
out. The flame sensor should be carefully cleaned by a qualified servicer using emery cloth or steel wool. Following cleaning, the
flame sense signal should be as indicated in the Specifications Sheet.
FLUE PASSAGES (QUALIFIED SERVICER ONLY)
The heat exchanger flue passageways should be inspected at the beginning of each heating season.
BEFORE LEAVING AN INSTALLATION
• Cycle the furnace with the thermostat at least three times. Verify cooling and fan only operation.
• Review the Owner’s Manual with the homeowner and discuss proper furnace operation and maintenance.
• Leave literature packet near furnace.
39
REPAIR AND REPLACEMENT PARTS
• When ordering any of the listed functional parts, be sure to provide the furnace model, manufacturing, and serial numbers
with the order.
• Although only functional parts are shown in the parts list, all sheet metal parts, doors, etc. may be ordered by description.
• Parts are available from your distributor.
Functional Parts ListGas Valve
Natural Gas Orifice
Igniter
Rollout Limit Switch
Coil Front Cover
Induced Draft Blower
Blower Motor
Blower Mounting Bracket
Blower Housing
Door Switch
Integrated Control Module
Gas Manifold
Propane Gas Orifice
Flame Sensor
Primary Limit Switch
Transformer
Heat Exchanger with Recuperator Coil
40
Blower Wheel
Blower Cutoff
Pressure Switch
Auxiliary Limit Switch
Door Switch
TROUBLESHOOTING CHART
Symptoms of Abnormal
Operation
•Furnace fails to
operate.
Associated
LED Code2
NONE
•Integrated control
module diagnostic LED
provides no signal.
•LED is Steady On.
Fault
Description(s)
Possible Causes
•No 115 volt power
to furnace, or no 24
volt power to
integrated control
module.
•Manual disconnect
switch OFF, door switch
open, or 24 volt wires
improperly connected or
loose.
•Blown fuse or
circuit breaker.
•Blown fuse or circuit
breaker.
•Integrated control
module has an
internal fault.
•Integrated control
module has an internal
fault.
Corrective Action
•Assure 115 and 24 volt
power to furnace
integrated control
module.
•Check integrated
control module fuse
(3A). Replace if
necessary.
•Check for possible
shorts in 115 and 24
volt circuits. Repair
as necessary.
•Replace bad integrated control module.
•None
Cautions &
Notes
•Turn power OFF
prior to repair.
•Replace integrated control
module fuse with
3A automotive
fuse.
•Read precautions
in “Electrostatic
Discharge”
section of manual.
• Normal Operation
• Normal Operation
• Normal Operation
•Furnace lockout
due to an excessive
number of ignition
“retries” (3 total)1.
•Failure to establish flame.
Cause may be no gas to
burners, front cover
pressure switch stuck
open, bad igniter or
igniter alignment,
improper orifices, or
coated/oxidized or
improperly connected
flame sensor.
•Locate and correct
gas interruption.
•Loss of flame after
establishment. Cause may
be interrupted gas supply,
lazy burner flames
(improper gas pressure or
restriction in flue and/or
combustion air piping),
front cover pressure
switch opening, or
improper induced draft
blower performance.
•Check flame sense
signal. Sand sensor if
coated and/or
oxidized.
•Induced draft blower
pressure switch contacts
sticking.
•Replace induced draft
blower pressure
switch.
•Shorts in pressure switch
circuit.
•Repair short.
•Replace pressure
switch with
proper replacement part.
•Pressure switch hose
blocked, pinched or
connected improperly.
•Inspect pressure
switch hose. Repair,
if necessary,
•Turn power
OFF prior to
repair.
•Blocked flue and/or inlet
air pipe, blocked drain
system, or weak induced
draft blower.
•Inspect flue and/or
inlet air piping for
blockage, proper
length, elbows, and
termination. Check
drain system.
Correct as
necessary.
•Replace
pressure
switch with
proper
replacement
part.
ON
CONTINUOUS
ON
•Furnace fails to
operate.
•Integrated control
module diagnostic LED
is flashing ONE (1) flash.
•Furnace fails to
operate.
•Integrated control
module diagnostic LED
is flashing TWO (2)
flashes.
•Induced draft blower
runs continuously with
no further furnace
operation.
•Integrated control
module diagnostic LED
is flashing THREE (3)
flashes.
1
1 FLASH
2
2 FLASHES
3
3 FLASHES
• Pressure switch
circuit is closed.
• Induced draft
blower is not
operating.
• Pressure switch
circuit not closed.
• Induced draft
blower is operating.
•Incorrect pressure
switch setpoint or
malfunctioning switch
contacts.
•Loose or improperly
connected wiring.
•Check front cover
pressure switch
operation (hose,
wiring, contact
operation). Correct if
necessary.
•Replace or realign
igniter.
•Check flue piping for
blockage, proper
length, elbows, and
termination.
Integrated control module will automatically attempt to reset from lockout after one hour.
LED Flash code will cease if power to the control module is interrupted through the disconnect or door switch.
1
41
•Igniter is
fragile, handle
with care.
•Sand flame
sensor with
emery cloth.
•See “Vent/
Flue Pipe”
section for
piping details.
•Verify proper induced
draft blower performance.
•Correct pressure
switch setpoint or
contact motion.
•Tighten or correct
wiring connection.
2
•Turn power
OFF prior to
repair.
•Turn power OFF
prior to repair.
TROUBLESHOOTING CHART
Symptoms of Abnormal Associated
Operation
LED Code2
•Circulator blower runs
continuously. No
furnace operation.
•Integrated control
module diagnostic LED
is flashing FOUR (4)
flashes.
4
Fault
Description(s)
Possible Causes
•Primary or auxiliary •Faulty primary or auxiliary
limit circuit is open. limit switch.
•Insufficient conditioned
air over the heat exchanger. Blocked filters,
restrictive ductwork,
improper circulator blower
speed, or failed circulator
blower.
4 FLASHES
•Loose or improperly
connected wiring.
Corrective Action
•Check primary/
auxiliary limit.
Replace if necessary.
•Check filters and
ductwork for
blockage. Clean filters
or remove obstruction.
•Check circulator
blower speed and
performance.
Correct speed or
replace blower if
necessary.
Cautions and
Notes
•Turn power OFF
prior to repair.
•Replace primary/
auxiliary limit with
proper replacement part.
•Replace blower
with correct
replacement part.
•Tighten or correct
wiring connection.
•Induced draft blower
and circulation blower
runs continuously. No
furnace operation.
•Integrated control
module diagnostic LED
is flashing FIVE (5)
flashes.
•Circulator blower runs
continuously. No
furnace operation.
•Integrated control
module diagnostic LED
is flashing SIX (6)
flashes.
5
•Flame sensed with
no call for heat.
•Short to ground in flame
sense circuit.
•Correct short at
flame sensor or in
flame sensor wiring.
•Turn power OFF
prior to repair.
•Rollout limit circuit
is open.
•Flame rollout.
•Check burners for
proper alignment.
•Turn power OFF
prior to repair.
5 FLASHES
6
6 FLASHES
•Misaligned burners,
•Check flue and air
blocked flue and/or air
inlet piping for
inlet pipe, or failed induced
blockage, proper
draft blower.
length, elbows, and
•Loose or improperly
termination. Correct
connected wiring.
as necessary.
•Faulty rollout limit.
•Check rollout limit.
Replace if necessary.
•Check induced draft
blower for proper
performance.
Replace, if necessary.
•See “Vent/Flue
Pipe” section for
piping details.
•Replace rollout
limit with correct
replacement part.
• Replace induced
draft blower with
correct replacement part.
•Tighten or correct
wiring connection.
•Normal furnace
operation.
•Integrated control
module diagnostic LED
is flashing SEVEN (7)
flashes.
•Furnace fails to
operate.
•Integrated control
module diagnostic LED
is flashing continuously.
7
•Flame sense
microamp signal is
low.
7 FLASHES
C
CONTINUOUS/
RAPID FLASH
•Polarity of 115 or
24 volt power is
reversed.
•Flame sensor is coated/
oxidized.
•Sand flame sensor if
coated/oxidized.
•Turn power OFF
prior to repair.
•Flame sensor incorrectly
positioned in burner flame.
•Inspect for proper
sensor alignment.
•Sand flame sensor
with emery clot.
•Lazy burner flame due to
improper gas pressure or
combustion air.
•Check inlet air piping
for blockage, proper
length, elbows, and
termination.
•See “Vent/Flue
Pipe” section for
piping details.
•Compare current gas
pressure to rating
plate info. Adjust as
needed.
•See rating plate
for proper gas
pressure.
•Polarity of 115 volt AC
power to furnace or
integrated control module
is reversed.
•Review wiring
diagram to correct
polarity.
•Orange and gray wires to
transformer are reversed.
•Reverse orange and
gray wires going to
transformer.
•Poor unit ground.
•Verify proper ground.
Correct if necessary.
1
Integrated control module will automatically attempt to reset from lockout after one hour.
LED Flash code will cease if power to the control module is interrupted through the disconnect or door switch.
2
42
•Turn power OFF
prior to repair.
AIRFLOW
*MSS92*** & *CSS92***A*
0.6
0.7
0.8
AC
CFM
RISE
CFM
RISE
CFM
RISE
CFM
RISE
CFM
RISE
CFM
CFM
CFM
HIGH
3.0
1498
N/A
1446
N/A
1368
N/A
1302
N/A
1227
N/A
1145
1059
954
MED
2.5
1223
N/A
1182
N/A
1153
30
1099
31
1051
32
982
901
813
MED-LO
2.0
983
35
971
35
945
36
919
37
878
39
813
746
659
LOW
1.5
816
42
794
43
758
45
734
46
678
50
637
597
523
HIGH
3.0
1494
N/A
1428
36
1362
38
1294
39
1231
42
1162
1076
972
0.1
*MSS920402BN
*MSS920603BN
*MSS920803BN
*MSS920804CN
*MSS920805CN
*MSS921004CN
*MSS921005CN
*MSS921205DN
*CSS920402BN
*CSS920603BN
*CSS920804CN
*CSS921005CN
0.2
0.3
0.4
0.5
MED
2.5
1203
42
1178
43
1147
45
1101
46
1045
49
986
927
831
MED-LO
2.0
977
52
965
53
939
54
904
57
866
59
801
763
639
LOW
1.5
801
64
786
65
751
N/A
714
N/A
714
N/A
680
635
596
HIGH
3.0
1459
47
1397
49
1339
51
1270
54
1202
57
1107
1049
952
MED
2.5
1191
57
1166
58
1137
60
1086
63
1033
N/A
973
889
797
MED-LO
2.0
985
N/A
967
N/A
932
N/A
900
N/A
859
N/A
805
731
620
LOW
1.5
808
N/A
785
N/A
758
N/A
726
N/A
679
N/A
629
590
513
HIGH
5.0
2115
N/A
2050
N/A
1973
35
1915
36
1810
38
1695
1587
1467
MED
4.0
1802
38
1739
39
1725
40
1665
41
1612
42
1532
1443
1320
MED-LO
3.5
1517
45
1509
45
1496
46
1475
46
1441
47
1388
1304
1205
LOW
3.0
1213
56
1225
56
1216
56
1194
57
1179
58
1135
1084
1005
HIGH
5.0
2284
30
2231
31
2170
31
2103
32
2037
33
1945
1836
1750
MED
4.0
1865
37
1869
36
1775
38
1732
39
1684
40
1619
1548
1480
MED-LO
3.5
1594
43
1571
43
1530
45
1492
46
1454
47
1414
1355
1293
LOW
3.0
1411
48
1366
50
1325
51
1296
53
1251
54
1200
1147
1096
HIGH
5.0
2082
41
1997
43
1943
44
1847
46
1749
49
1669
1560
1443
MED
4.0
1823
47
1782
48
1711
50
1659
51
1574
54
1513
1402
1305
MED-LO
3.5
1565
54
1545
55
1529
56
1487
57
1441
59
1365
1287
1196
LOW
3.0
1261
N/A
1237
N/A
1242
N/A
1216
N/A
1179
N/A
1145
1098
1034
HIGH
5.0
2137
40
2073
41
2031
42
1949
44
1879
45
1811
1734
1625
MED
4.0
1793
48
1754
49
1704
50
1648
52
1590
54
1534
1451
1371
MED-LO
3.5
1558
55
1518
56
1477
58
1425
60
1376
62
1316
1242
1170
LOW
3.0
1370
62
1325
64
1288
N/A
1237
N/A
1191
N/A
1134
1086
1024
HIGH
5.0
2256
45
2192
47
2133
48
2054
50
1986
51
1907
1834
1718
MED
4.0
1805
57
1762
58
1722
59
1677
61
1618
63
1563
1507
1441
MED-LO
3.5
1565
65
1513
N/A
1480
N/A
1415
N/A
1392
N/A
1346
1269
1198
LOW
3.0
1368
N/A
1326
N/A
1278
N/A
1238
N/A
1208
N/A
1165
1093
1052
HIGH
3.0
1400
N/A
1331
N/A
1263
N/A
1189
N/A
1106
31
1020
941
843
MED
2.5
1204
N/A
1176
N/A
1121
30
1072
32
1002
34
927
853
740
MED-LO
2.0
1020
33
998
34
968
35
923
37
880
39
820
739
652
LOW
1.5
841
41
827
41
797
43
766
44
727
47
680
634
556
HIGH
3.0
1668
31
1335
38
1288
40
1207
42
1133
45
1061
955
845
MED
2.5
1224
42
1182
43
1139
45
1088
47
1015
50
948
859
759
MED-LO
2.0
1030
50
1005
51
988
52
942
54
893
57
830
751
666
LOW
1.5
859
60
830
62
815
63
789
65
751
N/A
693
629
556
HIGH
4.0
1770
39
1645
41
1610
42
1528
45
1437
47
1340
1251
1141
MED
3.5
1690
40
1615
42
1531
45
1470
46
1393
49
1308
1196
1099
MED-LO
3.0
1612
42
1540
44
1472
46
1398
49
1306
52
1223
1132
1010
LOW
2.5
1396
49
1339
51
1304
52
1250
55
1170
58
1092
1010
906
HIGH
4.0
1793
48
1699
50
1610
53
1533
56
1461
58
1363
1247
1146
MED
3.5
1693
50
1622
53
1552
55
1467
58
1390
61
1320
1205
1083
MED-LO
3.0
1632
52
1546
55
1493
57
1415
60
1332
64
1257
1148
1054
LOW
2.5
1429
60
1380
62
1334
64
1258
N/A
1199
N/A
1136
1041
942
1.
CFM in chart is without filter(s). Filters do not ship with this furnace, but must be provided by the installer. If the furnace requires two return filters, this chart
assumes both filters are installed.
2.
All furnaces ship as high speed cooling and medium-speed heating. Installer must adjust blower cooling & heating speed as needed.
3.
For most jobs, about 400 CFM per ton when cooling is desirable.
4.
INSTALLATION IS TO BE ADJUSTED TO OBTAIN TEMPERATURE RISE WITHIN THE RANGE SPECIFIED ON THE RATING PLATE.
5.
The chart is for information only. For satisfactory operation, external static pressure must not exceed value shown on rating plate. The shaded area indicates
ranges in excess of maximum external static pressure allowed when heating. The data for 0.6" w.c. to 0.8" w.c. is shown for air conditioning purposes only.
6.
At higher altitudes, a properly derated unit will have approximately the same temperature rise at a particular CFM, while the ESP at that CFM will be lower.
43
AIRFLOW
*MSS96*** & *CSS96***A*
AC
CFM
RISE
CFM
RISE
CFM
RISE
CFM
RISE
CFM
RISE
0.6
CFM
0.7
CFM
0.8
CFM
HIGH
3.0
1478
N/A
1418
25
1354
26
1290
28
1208
29
1129
1040
930
MED
2.5
1299
27
1265
28
1225
29
1167
30
1112
32
1033
949
841
MED-LO
2.0
1081
33
1064
33
1039
34
997
36
945
38
886
819
722
LOW
1.5
966
37
951
37
925
38
892
40
861
41
808
750
666
HIGH
3.0
1432
37
1374
39
1319
40
1237
43
1157
46
1063
958
854
0.1
*MSS960402BN
*MSS960603BN
*MSS960803BN
*MSS960804CN
*MSS960805CN
*MSS961005CN
*MSS961205DN
*CSS960402BN
*CSS960603BN
*CSS960804CN
*CSS961005CN
*CSS961205DN
0.2
0.3
0.4
0.5
MED
2.5
1289
41
1250
43
1204
44
1142
47
1066
50
981
897
789
MED-LO
2.0
1080
49
1057
50
1022
52
980
54
926
58
861
785
700
LOW
1.5
967
55
945
56
919
58
879
61
844
63
789
712
632
HIGH
3.0
1620
44
1561
46
1478
48
1401
51
1322
54
1239
1150
1052
MED
2.5
1538
46
1476
48
1401
51
1332
53
1250
57
1166
1083
992
MED-LO
2.0
1446
49
1388
51
1333
53
1258
57
1197
59
1112
1037
937
LOW
1.5
1246
57
1217
58
1165
61
1128
63
1067
N/A
994
938
840
HIGH
4.0
1746
41
1671
43
1589
45
1516
47
1447
49
1371
1295
1160
MED
2.5
1190
60
1179
60
1151
62
1138
62
1090
65
1042
970
879
MED-LO
2.0
894
N/A
877
N/A
867
N/A
870
N/A
863
N/A
831
764
671
LOW
1.5
624
N/A
595
N/A
620
N/A
620
N/A
610
N/A
604
571
519
HIGH
5.0
2233
32
2159
33
2086
34
2024
35
1941
37
1850
1753
1651
MED
4.0
1820
39
1778
40
1742
41
1695
42
1638
43
1551
1485
1384
MED-LO
3.5
1571
45
1535
46
1497
48
1446
49
1402
51
1338
1280
1204
LOW
3.0
1361
52
1333
53
1290
55
1255
N/A
1208
N/A
1171
1104
1051
HIGH
5.0
2157
41
2087
43
2028
44
1953
46
1858
48
1775
1661
1558
MED
4.0
1907
47
1852
48
1800
49
1738
51
1675
53
1605
1514
1410
MED-LO
3.5
1608
55
1580
56
1493
60
1501
59
1440
62
1367
1296
1219
LOW
3.0
1390
N/A
1344
N/A
1326
N/A
1268
N/A
1227
N/A
1194
1132
1071
HIGH
5.0
2204
48
2144
50
2080
51
1991
54
1914
56
1817
1724
1595
MED
4.0
1938
55
1914
56
1849
58
1778
60
1713
62
1645
1548
1454
MED-LO
3.5
1651
65
1624
66
1574
68
1529
70
1475
72
1409
1331
1236
LOW
3.0
1427
75
1382
N/A
1345
N/A
1311
N/A
1272
N/A
1215
1159
1066
HIGH
3.0
1425
25
1345
26
1271
28
1198
30
1138
31
1051
945
864
MED
2.5
1254
28
1218
29
1155
31
1107
32
1040
34
952
869
761
MED-LO
2.0
1082
33
1051
34
1007
35
965
37
910
39
841
770
660
LOW
1.5
889
40
872
41
829
43
815
44
765
46
711
659
585
HIGH
3.0
1348
40
1283
42
1217
44
1151
46
1086
49
1014
931
844
MED
2.5
1188
45
1139
47
1098
49
1039
51
986
54
916
834
758
MED-LO
2.0
1015
53
985
54
945
56
909
59
858
62
804
733
655
LOW
1.5
821
65
814
N/A
788
N/A
765
N/A
720
N/A
677
640
564
HIGH
4.0
1736
41
1613
44
1578
45
1498
47
1409
50
1314
1226
1119
MED
3.5
1657
43
1583
45
1501
47
1441
49
1366
52
1282
1173
1077
MED-LO
3.0
1581
45
1510
47
1443
49
1371
52
1280
56
1199
1110
990
LOW
2.5
1369
52
1313
54
1278
56
1225
58
1147
62
1071
990
888
HIGH
5.0
2018
44
1953
46
1877
47
1788
50
1735
51
1659
1556
1448
MED
4.0
1826
49
1749
51
1660
54
1566
57
1496
59
1415
1335
1220
MED-LO
3.5
1618
55
1539
58
1476
60
1406
63
1340
66
1275
1194
1093
LOW
3.0
1402
63
1354
66
1296
69
1242
N/A
1173
N/A
1108
1042
965
HIGH
5.0
2123
50
2053
52
2000
53
1916
56
1832
58
1739
1646
1561
MED
4.0
1912
56
1844
58
1770
60
1708
62
1619
66
1543
1436
1349
MED-LO
3.5
1684
63
1622
66
1578
68
1503
71
1442
74
1374
1302
1204
LOW
3.0
1493
71
1436
74
1371
N/A
1319
N/A
1264
N/A
1208
1153
1061
1.
CFM in chart is without filter(s). Filters do not ship with this furnace, but must be provided by the installer. If the furnace requires two return filters, this chart
assumes both filters are installed.
2.
All furnaces ship as high speed cooling and medium-speed heating. Installer must adjust blower cooling & heating speed as needed.
3.
For most jobs, about 400 CFM per ton when cooling is desirable.
4.
INSTALLATION IS TO BE ADJUSTED TO OBTAIN TEMPERATURE RISE WITHIN THE RANGE SPECIFIED ON THE RATING PLATE.
5.
The chart is for information only. For satisfactory operation, external static pressure must not exceed value shown on rating plate. The shaded area indicates
ranges in excess of maximum external static pressure allowed when heating. The data for 0.6" w.c. to 0.8" w.c. is shown for air conditioning purposes only.
6.
At higher altitudes, a properly derated unit will have approximately the same temperature rise at a particular CFM, while the ESP at that CFM will be lower.
44
THIS PAGE LEFT INTENTIONALLY BLANK
45
HIGH VOLTAGE!
Disconnect ALL power before servicing or installing this unit. Multiple
power sources may be present. Failure to do so may cause property
damage, personal injury or death.
WIRING DIAGRAM
*MSS9**** & *CSS9****A*
Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.
46
SPECIAL INSTRUCTIONS
FOR
PRODUCTS INSTALLED
For all side wall horizontally vented gas fueled equipment installed in
every dwelling, building or structure used in whole or in part for residential purposes, including those owned or operated by the Commonwealth and where the side wall exhaust vent termination is less than
seven (7) feet above finished grade in the area of the venting, including
but not limited to decks and porches, the following requirements shall
be satisfied:
IN THE
STATE
OF
MASSACHUSETTS
VENT/FLUE
TEE
1. INSTALLATION OF CARBON MONOXIDE DETECTORS. At the time of
installation of the side wall horizontal vented gas fueled equipment,
DISTANCE BETWEEN
COMBUSTION
the installing plumber or gasfitter shall observe that a hard wired
VENT AND GRADE
AIR INTAKE.
carbon monoxide detector with an alarm and battery back-up is
installed on the floor level where the gas equipment is to be installed.
DISTANCE BETWEEN
COMBUSTION AIR
In addition, the installing plumber or gasfitter shall observe that a
INTAKE AND GRADE
battery operated or hard wired carbon monoxide detector with
an alarm is installed on each additional level of the dwelling, building
or structure served by the side wall horizontal vented gas fueled
equipment. It shall be the responsibility of the property owner to
secure the services of qualified licensed professionals for the
installation of hard wired carbon monoxide detectors
a. In the event that the side wall horizontally vented gas fueled equipment is installed in a crawl space or an attic, the hard wired carbon
monoxide detector with alarm and battery back-up may be installed on the next adjacent floor level.
b. In the event that the requirements of this subdivision can not be met at the time of completion of installation, the owner shall have a
period of thirty (30) days to comply with the above requirements; provided, however, that during said thirty (30) day period, a battery
operated carbon monoxide detector with an alarm shall be installed.
2. APPROVED CARBON MONOXIDE DETECTORS. Each carbon monoxide detector as required in accordance with the above provisions shall
comply with NFPA 720 and be ANSI/UL 2034 listed and IAS certified.
3. SIGNAGE. A metal or plastic identification plate shall be permanently mounted to the exterior of the building at a minimum height of eight (8)
feet above grade directly in line with the exhaust vent terminal for the horizontally vented gas fueled heating appliance or equipment. The
sign shall read, in print size no less than one-half (1/2) inch in size, “GAS VENT DIRECTLY BELOW. KEEP CLEAR OF ALL OBSTRUCTIONS”.
4. INSPECTION. The state or local gas inspector of the side wall horizontally vented gas fueled equipment shall not approve the installation
unless, upon inspection, the inspector observes carbon monoxide detectors and signage installed in accordance with the provisions of 248
CMR 5.08(2)(a)1 through 4.
EXEMPTIONS
The following equipment is exempt from 248 CMR 5.08(2)(a)1 through 4:
1. The equipment listed in Chapter 10 entitled “Equipment Not Required To Be Vented” in the most current edition of NFPA 54 as adopted by
the Board; and
2. Product Approved side wall horizontally vented gas fueled equipment installed in a room or structure separate from the dwelling, building or
structure used in whole or in part for residential purposes.
(c) MANUFACTURER REQUIREMENTS - GAS EQUIPMENT VENTING SYSTEM PROVIDED. When the manufacturer of Product Approved side wall
horizontally vented gas equipment provides a venting system design or venting system components with the equipment, the instructions
provided by the manufacturer for installation of the equipment and the venting system shall include:
1. Detailed instructions for the installation of the venting system design or the venting system components; and
2. A complete parts list for the venting system design or venting system.
(d) MANUFACTURER REQUIREMENTS - GAS EQUIPMENT VENTING SYSTEM NOT PROVIDED. When the manufacturer of a Product Approved side
wall horizontally vented gas fueled equipment does not provide the parts for venting the flue gases, but identifies “special venting
systems”, the following requirements shall be satisfied by the manufacturer:
1. The referenced “special venting system” instructions shall be included with the appliance or equipment installation instructions; and
2. The “special venting systems” shall be Product Approved by the Board, and the instructions for that system shall include a parts list and
detailed installation instructions.
(e) A copy of all installation instructions for all Product Approved side wall horizontally vented gas fueled equipment, all venting instructions,
all parts lists for venting instructions, and/or all venting design instructions shall remain with the appliance or equipment at the
completion of the installation.
47
NOTE: SPECIFICATIONS AND PERFORMANCE DATA LISTED HEREIN ARE SUBJECT TO CHANGE WITHOUT NOTICE.
Visit our web sites at www.goodmanmfg.com or www.amana-hac.com for information on:
• Products
• Warranties
• Customer Services
• Parts
• Contractor Programs and Training
• Financing Options
5151 San Felipe Suite 500
Houston, TX 77056
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© 2014 Goodman Manufacturing Company, L.P.
is a registered trademark of Maytag Corporation or its related companies and is used
under license to Goodman Company, L.P., Houston, TX. All rights reserved.
48