Goodman Mfg Co Lp Furnace Gas Fired Warm Air Users Manual

GAS-FIRED WARM AIR FURNACE to the manual e271dcec-018f-48b3-97ec-97efb66f6c17

2015-02-02

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*MH95/ACSH96/AMEH96/
GCH95/GME95/GCH9
GAS-FIRED WARM AIR FURNACE
INSTALLATION INSTRUCTIONS
Installer: Affix all manuals adjacent to the unit.

(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.

RECOGNIZE THIS SYMBOL AS A SAFETY PRECAUTION.

ATTENTION INSTALLING PERSONNEL
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.

NOTE: Please contact your distributor or our website
for the applicable Specification Sheet referred to in this manual.

IO-299R
5/2013

Goodman Manufacturing Company, L.P.
5151 San Felipe, Suite 500, Houston, TX 77056
www.goodmanmfg.com or www.amana-hac.com
© 2006-2013 Goodman Manufacturing Company, L.P.

Table of Contents
I. Component Identification ................................................................................................................................................ 5
II. Safety Considerations .................................................................................................................................................... 6

ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS .................................................................................................. 7
III. Product Application ...................................................................................................................................................... 7
IV. Location Requirements & Considerations ................................................................................................................. 8

12
12
12
12
13
13
13
13

VIII. Propane Gas /High Altitude Installations ............................................................................................................... 13
IX. Vent/Flue Pipe & Combustion Air Pipe ..................................................................................................................... 15

GENERAL ....................................................................................................................................................... 15
DUAL CERTIFICATION: NON-DIRECT/DIRECT VENT ................................................................................................... 15
MATERIALS AND JOINING METHODS ..................................................................................................................... 15
PROPER VENT/FLUE AND COMBUSTION AIR PIPING PRACTICES ................................................................................. 15
TERMINATION LOCATIONS ................................................................................................................................... 16
CANADIAN VENTING REQUIREMENTS ..................................................................................................................... 16
STANDARD FURNACE CONNECTIONS ..................................................................................................................... 16
ALTERNATE FURNACE CONNECTIONS ..................................................................................................................... 17
NON-DIRECT VENT (SINGLE PIPE) PIPING ............................................................................................................ 18
DIRECT VENT (DUAL PIPE) PIPING ...................................................................................................................... 19
VENT/INTAKE TERMINATIONS FOR INSTALLATION OF MULTIPLE DIRECT VENT FURNACES .................................................. 20
CONCENTRIC VENT TERMINATION ......................................................................................................................... 20
SIDE WALL VENT KIT ........................................................................................................................................ 20
X. Condensate Drain Lines & Drain Trap ........................................................................................................................ 20

STANDARD RIGHT OR LEFT SIDE DRAIN HOSE CONNECTIONS .................................................................................. 21
ALTERNATE VENT/FLUE DRAIN HOSE CONNECTIONS.................................................................................................22
UPRIGHT INSTALLATIONS-TRAP ON LEFT SIDE..........................................................................................................23
HORIZONTAL INSTALLATIONS .............................................................................................................................. 24
XI. Electrical Connections ................................................................................................................................................ 26

WIRING HARNESS ............................................................................................................................................ 26
115 VOLT LINE CONNECTIONS ............................................................................................................................ 26
JUNCTION BOX RELOCATION ............................................................................................................................... 26
24 VOLT THERMOSTAT WIRING .......................................................................................................................... 27
GME95/AMEH96 FURNACE WITH 2-STAGE CONDENSER FIELD WIRING ................................................................. 27
115 VOLT LINE CONNECTION OF ACCESSORIES (ELECTRONIC AIR CLEANER) ........................................................... 27
24 VOLT HUMIDIFIER ........................................................................................................................................ 28
XII. Gas Supply and Piping ............................................................................................................................................... 28

DUCTWORK - AIR FLOW ................................................................................................................................... 31
CHECKING DUCT STATIC ................................................................................................................................... 32
BOTTOM RETURN AIR OPENING [UPFLOW MODELS].............................................................................................. 32
FILTERS - READ THIS SECTION BEFORE INSTALLING THE RETURN AIR DUCTWORK ..................................................... 32
UPRIGHT INSTALLATIONS ................................................................................................................................... 33
HORIZONTAL INSTALLATIONS .............................................................................................................................. 33
2

Table of Contents
XIV. Startup Procedure & Adjustment ............................................................................................................................. 33

HEAT ANTICIPATOR SETTING .............................................................................................................................. 33
DRAIN TRAP PRIMING ....................................................................................................................................... 33
FURNACE OPERATION ........................................................................................................................................ 33
GAS SUPPLY PRESSURE MEASUREMENT .............................................................................................................. 34
GAS MANIFOLD PRESSURE MEASUREMENT AND ADJUSTMENT .................................................................................. 35
GAS INPUT RATE MEASUREMENT (NATURAL GAS ONLY) ........................................................................................ 35
TEMPERATURE RISE .......................................................................................................................................... 36
CIRCULATOR BLOWER SPEEDS ........................................................................................................................... 36
CIRCULATOR BLOWER FAN TIMING ADJUSTMENT .................................................................................................. 37
SETTING FURNACE OPERATING MODE .................................................................................................................. 37
XV. Normal Sequence of Operation ................................................................................................................................. 37

POWER UP ..................................................................................................................................................... 37
HEATING MODE ............................................................................................................................................... 37
(MODE DIP SWITCH IS SET TO “1 STG” POSITION) .............................................................................................. 37
(MODE DIP SWITCH IS SET TO “2 STG” POSITION) ............................................................................................. 38
COOLING MODE ............................................................................................................................................... 38
FAN ONLY MODE ............................................................................................................................................. 38
XVI. Operational Checks .................................................................................................................................................. 38

BURNER FLAME ............................................................................................................................................... 38
XVII. Safety Circuit Description ....................................................................................................................................... 38

ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS ................................................................................................ 39
DIAGNOSTIC CHART ......................................................................................................................................... 39
FAULT RECALL ................................................................................................................................................ 39
RESETTING FROM LOCKOUT .............................................................................................................................. 39
XIX. Maintenance .............................................................................................................................................................. 40

ANNUAL INSPECTION ......................................................................................................................................... 40
FILTERS .......................................................................................................................................................... 40
BURNERS ........................................................................................................................................................ 40
INDUCED DRAFT AND CIRCULATOR BLOWERS ........................................................................................................ 40
CONDENSATE TRAP AND DRAIN SYSTEM (QUALIFIED SERVICER ONLY) ...................................................................... 40
FLAME SENSOR (QUALIFIED SERVICER ONLY) ....................................................................................................... 40
IGNITER (QUALIFIED SERVICER ONLY) .................................................................................................................. 40
FLUE PASSAGES (QUALIFIED SERVICER ONLY) ..................................................................................................... 40
XX. Before Leaving an Installation ................................................................................................................................... 41
XXI. Repair & Replacement Parts .................................................................................................................................... 41
Troubleshooting Chart ..................................................................................................................................................... 42
Blower Performance Data ................................................................................................................................................ 44
Wiring Diagram ................................................................................................................................................................. 49
Special Instructions for Products Installed in the State of Massachusetts .................................................................. 52

WARNING
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 PROPERY DAMAGE WHICH
MAY RESULT.

MANY JURISDICTIONS REQUIRE A LICENSE TO INSTALL OR

SERVICE HEATING AND AIR CONDITIONING EQUIPMENT.

SHIPPING INSPECTION
WARNING

All units are securely packed in shipping containers tested according to
International Safe Transit Association specifications. The carton must be
checked upon arrival for external damage. If damage is found, a request
for inspection by carrier’s agent must be made in writing immediately.
The furnace must be carefully inspected on arrival for damage and bolts
or screws which may have come loose in transit. In the event of damage
the consignee should:
1. Make a notation on delivery receipt of any visible damage to
shipment or container.
2. Notify carrier promptly and request an inspection.
3. With concealed damage, carrier must be notified as soon as
possible - preferably within five days.
4. File the claim with the following support documents within a
nine month statute of limitations.

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:
* DO NOT TRY TO LIGHT ANY APPLIANCE.
* DO NOT TOUCH ANY ELECTRICAL SWITCH; DO NOT USE
ANY PHONE IN YOUR BUILDING.
* IMMEDIATELY CALL YOUR GAS SUPPLIER FROM A
NEIGHBORS PHONE. FOLLOW THE GAS SUPPLIERS
INSTRUCTIONS.
* IF YOU CANNOT READCH YOUR GAS SUPPLIER, CALL THE
FIRE DEPARTMENT.
- INSTALLATION AND SERVICE MUST BE PERFORMED BY A QUALIFIED
INSTALLER, SERVICE AGENCY OR THE GAS SUPPLIER

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.

•

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.
Keep this literature in a safe place for future reference.

CARBON MONOXIDE POISONING HAZARD
Special Warning for Installation of Furnace or Air Handling Units in
Enclosed Areas such as Garages, Utility Rooms or Parking Areas

Carbon monoxide producing devices (such as an automobile, space
heater, gas water heater, etc.) should not be operated in enclosed areas
such as unventilated garages, utility rooms or parking areas 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 such
as a garage, utility room or parking area and a carbon monoxide producing
device is operated therein, there must be adequate, direct outside
ventilation.

This ventilation is necessary to avoid the danger of CO poisoning which
can occur if a carbon monoxide producing device continues to operate in
the enclosed area. 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.
B10259-216

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.

COMPONENT

IDENTIFICATION

BURNER COMPARTMENT

11
25
24

*
*
*

*
*

3
3

BLOWER COMPARTMENT

31
18

16
30

20
13
12

2 21
9

Upflow/Horizontal
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21

6 4

Counterflow/Horizontal
22 Blower Door Interlock Switch
23 Capacitor
24 Integrated Control Module
(with fuse and diagnostic LED)
25 24-Volt Thermostat Connections
26 Transformer (40 VA)
27 Circulator Blower
28 Auxiliary Limit
29 Junction Box
30 Electrical Connection Inlets
31 Coil Front Cover

Gas Valve
Gas Line Entrance (Alternate)
Pressure Switch
Gas Manifold
Combustion Air Intake Connection / “Coupling”
Hot Surface Igniter
Rollout Limit
Burners
Flame Sensor
Flue Pipe Connection / “Coupling”
Flue Pipe (Internal)
Primary Limit
Gas Line Entrance
Flue Pipe Connection (Alternate)
Rubber Elbow
Induced Draft Blower
Electrical Connection Inlets (Alternate)
Coil Front Cover Pressure Tap
Coil Front Cover Drain Port
Drain Line Penetrations
Drain Trap

II. SAFETY CONSIDERATIONS

WARNING

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.
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.
Never test for gas leaks with an open flame. Use a commercially available soap solution made specifically for the detection of leaks to check
all connections, as specified in GAS SUPPLY AND PIPING section of
this manual.
Always install a furnace to operate within the furnace’s intended temperature-rise range with a duct system which has external static pressure within the allowable range, as specified on the furnace rating plate
and OPERATIONAL CHECKS section of these instructions.
When a furnace is installed so that supply ducts carry air circulated
by the furnace to areas outside the space containing the furnace, the
return air shall also be handled by duct(s) sealed to the furnace casing
and terminating outside the space containing the furnace.
A gas-fired furnace for installation in a residential garage must be installed as specified in the LOCATION REQUIREMENTS AND CONSIDERATIONS section of this manual.
This furnace may be used as a construction site heater only if certain
conditions are met. These conditions are listed in the PRODUCT
APPLICATION section of this manual.

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 .

WARNING
HEATING UNIT SHOULD NOT BE UTILIZED WITHOUT REASONABLE,
ROUTINE, INSPECTION , MAINTENANCE AND SUPERVISION . IF THE
BUILDING IN WHICH ANY SUCH DEVICE IS LOCATED WILL BE VACANT,
CARE SHOULD BE TAKEN THAT SUCH DEVICE IS ROUTINELY INSPECTED,
MAINTAINED AND MONITORED . IN THE EVENT THAT THE BUILDING
MAYBE EXPOSED TO FREEZING TEMPERATURES AND WILL BE VACANT ,
ALL WATER ‐BEARING PIPES SHOULD BE DRAINED , THE BUILDING SHOULD
BE PROPERLY WINTERIZED , AND THE WATER SOURCE CLOSED . IN THE
EVENT THAT THE BUILDING MAY BE EXPOSED TO FREEZING
TEMPERATURES AND WILL BE VACANT , ANY HYDRONIC COIL UNITS
SHOULD BE DRAINED AS WELL AND , IN SUCH CASE , ALTERNATIVE HEAT
SOURCES SHOULD BE UTILIZED.

WARNING
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 .

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 .

CARBON MONOXIDE POISONING HAZARD
Special Warning for Installation of Furnace or Air Handling Units in
Enclosed Areas such as Garages, Utility Rooms or Parking Areas

WARNING
Carbon monoxide producing devices (such as an automobile, space
heater, gas water heater, etc.) should not be operated in enclosed areas
such as unventilated garages, utility rooms or parking areas 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 such
as a garage, utility room or parking area and a carbon monoxide producing
device is operated therein, there must be adequate, direct outside
ventilation.

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.

CO can cause serious illness including permanent brain damage or death.
B10259-216

•

It must be installed with two-pipe systems for combustion
air, especially if VOC’s or other contaminants are present
in the conditioned space.
SHOULD OVERHEATING OCCUR OR THE GAS SUPPLY FAIL TO SHUT OFF,
•
All
other warranty exclusions and restrictions apply This
TURN OFF THE MANUAL GAS SHUTOFF VALVE EXTERNAL TO THE
furnace is an ETL dual-certified appliance and is
FURNACE BEFORE TURNING OFF THE ELECTRICAL SUPPLY.
appropriate for use with natural or propane gas (NOTE: If
using propane, a propane conversion kit is required).
WARNING
Dual certification means that the combustion air inlet pipe is optional and the furnace can be vented as a:
POSSIBLE PROPERTY DAMAGE , PERSONAL INJURY OR DEATH DUE TO
Non-direct vent (single pipe) central forced air furnace in
FIRE, EXPLOSION , SMOKE, SOOT, CONDENSATION , ELECTRICAL SHOCK
which combustion air is taken from the installation area
OR CARBON MONOXIDE MAY RESULT FROM IMPROPER INSTALLATION,
or from air ducted from the outside or,
REPAIR OPERATION, OR MAINTENANCE OF THIS PRODUCT.
Direct vent (dual pipe) central forced air furnace in which
all combustion air supplied directly to the furnace burners
ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS
through a special air intake system outlined in these
instructions.
NOTE: Discharge static electricity accumulated in the body before This furnace may be used as a construction site heater ONLY if the
touching the unit. An electrostatic discharge can adversely affect following conditions are met:
electrical components.
•
The vent system is permanently installed per these
Use the following precautions during furnace installation and serinstallation instructions.
vicing to protect the integrated control module from damage. By
•
A room thermostat is used to control the furnace. Fixed
putting the furnace, the control, and the person at the same electrojumpers that provide continuous heating CANNOT be
static potential, these steps will help avoid exposing the integrated
used.
control module to electrostatic discharge. This procedure is appli•
Return
air ducts are provided and sealed to the furnace.
cable to both installed and non-installed (ungrounded) furnaces.
•
A return air temperature range between 60ºF (16ºC) and
1. Disconnect all power to the furnace. Do not touch the
80ºF (27ºC) is maintained.
integrated control module or any wire connected to the control
•
Air
filters are installed in the system and maintained
prior to discharging your body’s electrostatic charge to
during
construction, replaced as appropriate during
ground.
construction, and upon completion of construction are
2. Firmly touch a clean, unpainted, metal surface of the
replaced.
furnaces near the control. Any tools held in a person’s hand
•
The input rate and temperature rise are set per the furnace
during grounding will be discharged.
rating plate.
3. Service integrated control module or connecting wiring
•
100% outside air is provided for combustion air
following the discharge process in step 2. Use caution not
requirements during construction. Temporary ducting can
to recharge your body with static electricity; (i.e., do not move
be used.
or shuffle your feet, do not touch ungrounded objects, etc.).
NOTE: Do not connect the temporary duct directly to the
If you come in contact with an ungrounded object, repeat
furnace. The duct must be sized according to the
step 2 before touching control or wires.
instructions under Section V, Combustion and Ventilation
4. Discharge your body to ground before removing a new
Air Requirements, Section 5.3.3.
control from its container. Follow steps 1 through 3 if
•
The furnace heat exchanger, components, duct system,
installing the control on a furnace. Return any old or new
air filters and evaporator coils are thoroughly cleaned
controls to their containers before touching any ungrounded
following final construction clean up.
object.
•
All furnace operating conditions (including ignition, input
rate, temperature rise and venting) are verified according
III. PRODUCT APPLICATION
to these installation instructions.
This furnace is primarily designed for residential home-heating
applications. It is NOT designed or certified for use in mobile NOTE: The Commonwealth of Massachusetts requires that the
homes, trailers or recreational vehicles. This unit is NOT designed following additional requirements must also be met:
or certified for outdoor applications. The furnace must be installed
•
Gas furnaces must be installed by a licensed plumber or
indoors (i.e., attic space, crawl space, or garage area provided the
gas fitter.
garage area is enclosed with an operating door).
•
A T-handle gas cock must be used.
This furnace can be used in the following non-industrial commer•
If the unit is to be installed in an attic, the passageway to
cial applications:
and the service area around the unit must have flooring.
Schools, Office buildings, Churches, Retail stores
Nursing homes, Hotels/motels, Common or office areas
To ensure proper installation and operation, thoroughly read this
In such applications , the furnace must be installed with the follow- manual for specifics pertaining to the installation and application
ing stipulations:
of this product.
•
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.

WARNING

•

WARNING
POSSIBLE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH DUE TO
FIRE, EXPLOSION, SMOKE, SOOT, CONDENSATION, ELECTRICAL
SHOCK OR CARBON MONOXIDE MAY RESULT FROM IMPROPER
INSTALLATION, REPAIR, OPERATION, OR MAINTENANCE OF THIS
PRODUCT .

WARNING

•

TO PREVENT PERSONAL INJURY, PROPERTY DAMAGE OR DEATH DUE
TO FIRE, DO NOT INSTALL THIS FURNACE IN A MOBILE HOME,
TRAILER OR RECREATIONAL VEHICLE.

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 B149.1-05.1-05 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
1430 Broadway
New York, NY 10018

•

National Fire Protection Association
1 Batterymarch Park
Quincy, MA 02269

•

CSA International
8501 East Pleasant Valley
Cleveland, OH 44131
A copy of the CAN/CSA B149.1-05.1-05 Installation Codes can also
be obtained from:
CSA International
178 Rexdale Boulevard
Etobicoke, Ontario, Canada M9W 1R3
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.

•

IV. LOCATION REQUIREMENTS & CONSIDERATIONS

GENERAL
WARNING
TO PREVENT POSSIBLE EQUIPMENT DAMAGE, PROPERTY DAMAGE,
PERSONAL INJURY OR DEATH, THE FOLLOWING BULLET POINTS MUST
BE OBSERVED WHEN INSTALLING THE UNIT.

Follow the instructions listed below when selecting a furnace location. Refer also to the guidelines provided in Combustion and
Ventilation Air Requirements.
•
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:
chlorinated waxes or cleaners
chlorine-based swimming pool chemicals
water softening chemicals
deicing salts or chemicals
carbon tetrachloride
halogen type refrigerants
cleaning solutions (such as perchloroethylene)
printing inks
paint removers
varnishes
hydrochloric acid
cements and glues
antistatic fabric softeners for clothes dryers
and masonry acid washing materials

*NOTE: Please contact your distributor or our website for the applicable Specification Sheet referred to in this manual.
8

•

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 unit, install
the furnace upstream or in parallel with the cooling 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, the furnace access
doors must be vertical so that the burners fire horizontally
into the heat exchanger. Do not install the unit with the
access doors on the “up/top” or “down/bottom” side of
the furnace.

FURNACE SUSPENSION
If suspending the furnace from rafters or joists, use 3/8" threaded rod
and 2”x2”x1/8” angle iron as shown below. The length of rod will depend on the application and the clearances necessary.
PROVIDE 8" MINMUM CLEARANCE BETWEEN
CENTER ROD AND FURNACE CABINET
TO ALLOW FOR CIRCULATOR BLOWER REMOVAL

3/8" DIAMETER
ASSURE FURNACE IS LEVEL FROM

THREADED ROD

END TO END AND HAS A SLIGHT

(6 PLACES)

FORWARD TILT WITH THE FRONT
OF THE FURNACE 0"-3/4"
BELOW THE BACK OF THE FURNACE
HOLD DOWN
NUTS
SUPPORT
NUTS

2"X2"X1/8" ANGLE IRON
(3 PLACES)

POSITION AS CLOSE AS POSSIBLE
TO BLOWER DECK TO ALLOW FOR
CIRCULATOR BLOWER REMVOAL

TILT OUTWARD TO ALLOW FOR
DOOR AND CIRCULATOR BLOWER
REMOVAL

Suspended Furnace

EXISTING FURNACE REMOVAL
NOTE: When an existing furnace is removed from a venting system
serving other appliances, the venting system may be too large to
properly vent the remaining attached appliances.
The following vent testing procedure is reproduced from the American
National Standard/National Standard of Canada for Gas-Fired Central Furnaces ANSI Z21.47-Latest Edition, CSA-2.3b--Latest Edition
Section 1.23.1.

CLEARANCES AND ACCESSIBILITY

Installations must adhere to the clearances to combustible materials to which this furnace has been design certified. The mini- The following steps shall be followed with each appliance connected to the
mum clearance information for this furnace is provided on the unit’s venting system placed in operation, while any other appliances connected
clearance label. These clearances must be permanently main- to the venting system are not in operation:
tained. Clearances must also accommodate an installation’s gas,
a. Seal any unused openings in the venting system;
electrical, and drain trap and drain line connections. If the alternate
b. Inspect the venting system for proper size and horizontal pitch, as
vent/flue connection is used, additional clearance must be prorequired by the National Fuel Gas Code, ANSI Z223.1 or the CSA
vided to accommodate these connections. Refer to Vent Flue Pipe
B149.1-05.1-05 Installation Codes and these instructions. Deterand Combustion Air Pipe for details. NOTE: In addition to the
mine that there is no blockage or restriction, leakage, corrosion and
required clearances to combustible materials, a minimum of 24
other deficiencies which could cause an unsafe condition;
inches service clearance must be available in front of the unit.
TOP

c. In so 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. Turn on
clothes dryers and any appliance not connected to the venting system. Turn on any exhaust fans, such as range hoods and bathroom
exhausts, so they shall operate at maximum speed. Do not operate a
summer exhaust fan. Close fireplace dampers;

TOP
S ID E

S ID E

S ID E
B OTTO M

B O T TO M
U pflow

C ou nte rflo w

d. Follow the lighting instructions. Place the appliance being inspected
in operation. Adjust thermostat so appliance shall operate continuously;

H orizo n ta l

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 the 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.

e. Test for draft hood equipped spillage at the draft hood relief opening
after 5 minutes of main burner operation. Use the flame of a match
or candle;
f. After it has been determined that each appliance connected to the
venting system properly vents when tested as outlined above, return doors, windows, exhaust fans, fireplace dampers and any other
gas burning appliance to their previous conditions of use;
g. If improper venting is observed during any of the above tests, the
common venting system must be corrected.
Corrections must be in accordance with the latest edition of the
National Fuel Gas Code NFPA 54/ANSI Z223.1 and/or CSA B149.105.1-05 Installation Codes.
9

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 B149.1-05.1-05 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.

Most homes will require outside air be supplied to the furnace area by
means of ventilation grilles or ducts connecting directly to the outdoors
or spaces open to the outdoors such as attics or crawl spaces.
The following information on air for combustion and ventilation is reproduced
from the National Fuel Gas Code NFPA 54/ANSI Z223.1 Section 5.3.
5.3.1 General:
(a) The provisions of 5.3 apply to gas utilization equipment installed in
buildings and which require air for combustion, ventilation and dilution of flue gases from within the building. They do not apply to (1)
direct vent equipment which is constructed and installed so that all
air for combustion is obtained from the outside atmosphere and all
flue gases are discharged to the outside atmosphere, or (2) enclosed
furnaces which incorporate an integral total enclosure and use only
outside air for combustion and dilution of flue gases.
(b) Equipment shall be installed in a location in which the facilities for
ventilation permit satisfactory combustion of gas, proper venting
and the maintenance of ambient temperature at safe limits under
normal conditions of use. Equipment shall be located so as not to
interfere with proper circulation of air. When normal infiltration
does not provide the necessary air, outside air shall be introduced.

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.

DRAFTS OR DEAD SPOTS
-BEHIND DOORS
-IN CORNERS
-UNDER CABINETS

(c) In addition to air needed for combustion, process air shall be provided as required for: cooling of equipment or material, controlling
dew point, heating, drying, oxidation or dilution, safety exhaust,
odor control, and air for compressors.
(d) In addition to air needed for combustion, air shall be supplied for
ventilation, including all air required for comfort and proper working
conditions for personnel.

HOT
COLD

(e) While all forms of building construction cannot be covered in detail,
air for combustion, ventilation and dilution of flue gases for gas
utilization equipment vented by natural draft normally may be obtained by application of one of the methods covered in 5.3.3 and
5.3.4.

Thermostat Influences
Consult the instructions packaged with the thermostat for mounting instructions and further precautions.
V. COMBUSTION & VENTILATION AIR REQUIREMENTS

WARNING
POSSIBLE PROPERTY DAMAGE PERSONAL INJURY OR DEATH MAY OCCUR IF
THE FURNACE IS NOT PROVIDED WITH ENOUGH FRESH AIR FOR PROPER
COMBUSTION AND VENTILATION OF FLUE GASES. MOST HOMES REQUIRE
OUTSIDE AIR BE SUPPLIED TO THE FURNACE AREA.

Improved construction and additional insulation in buildings have
reduced heat loss by reducing air infiltration and escape around
doors and windows. These changes have helped in reducing
heating/cooling costs but have created a problem supplying combustion 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
(Section 5.3), or CSA B149.1-05 Installation Codes (Sections 7.2,
7.3, or 7.4), or applicable provisions of the local building codes for
determining the combustion air requirements for the appliances.

(f) Air requirements for the operation of exhaust fans, kitchen ventilation systems, clothes dryers, and fireplaces shall be considered in
determining the adequacy of a space to provide combustion air
requirements.
5.3.2 Equipment Located in Unconfined Spaces:
In unconfined spaces (see definition below) in buildings, infiltration may
be adequate to provide air for combustion ventilation and dilution of
flue gases. However, in buildings of tight construction (for example,
weather stripping, heavily insulated, caulked, vapor barrier, etc.), additional air may need to be provided using the methods described in 5.3.3b or 5.3.4.
Space, Unconfined.
For purposes of this Code, a space whose volume is not less than 50
cubic feet per 1,000 BTU per hour of the aggregate input rating of all
appliances installed in that space. Rooms communicating directly with
the space in which the appliances are installed through openings not
furnished with doors, are considered a part of the unconfined space.
5.3.3 Equipment Located in Confined Spaces:

(a) All Air from Inside the Building: The confined space shall be provided with two permanent openings communicating directly with
an additional room(s) of sufficient volume so that the combined volume of all spaces meets the criteria for an unconfined space. The
total input of all gas utilization equipment installed in the combined
space shall be considered in making this determination. Each opening
shall have a minimum free area of 1 square inch per 1,000 BTU per
hour of the total input rating of all gas utilization equipment in the
confined space, but not less than 100 square inches. One opening
shall be within 12 inches of the top and one within 12 inches of the
bottom of the enclosure.

Chimney or Gas Vent

NOTE: Each opening must have
a free area of not less than one
square inch per 1000 BTU of
the total input rating of all equipment in the enclosure, but not
less than 100 square inches.

Ventilation louvers
(each end of attic)

NOTE: The inlet and outlet air
openings must each have a free
area of not less than one square
inch per 4000 BTU of the
total input rating of all equipment
in the enclosure.

Opening

Outlet Air

Furnace

Water
Heater

Furnace

Water
Heater
Inlet air duct
[ends 1 ft (300 mm)
above floor]

Opening

Equipment Located in Confined Spaces; All Air from Inside Building.
See 5.3.3-a.

Equipment Located in Confined Spaces; All Air from Outdoors
Through Ventilated Attic. See 5.3.3-b.

(b) All Air from Outdoors: The confined space shall be provided with
two permanent openings, one commencing within 12 inches of the
top and one commencing within 12 inches of the bottom of the
enclosure. The openings shall communicate directly, or by ducts,
with the outdoors or spaces (crawl or attic) that freely communicate
with the outdoors.

3. When communicating with the outdoors through horizontal ducts,
each opening shall have a minimum free area of 1 square inch per
2,000 BTU per hour of total input rating of all equipment in the
enclosure.
Chimney or Gas Vent

1. When directly communicating with the outdoors, each opening
shall have a minimum free area of 1 square inch per 4,000 BTU
per hour of total input rating of all equipment in the enclosure.
Chimney or Gas Vent
Ventilation louvers
(each end of attic)
Outlet air duct

NOTE: The inlet and outlet air
openings must each have a free
area of not less than one square
inch per 4000 BTU of the
total input rating of all equipment
in the enclosure.

Furnace

NOTE: The air duct openings
must have a free area of not
less than one square inch per
2000 BTU of the total input
rating of all equipment in the
enclosure*.

Water
Heater
Inlet air duct

Outlet Air

Furnace

Water
Heater

*If the appliance room is located against an outside wall and the air openings communicate directly with the
outdoors, each opening shall have a free area of not less than one square inch per 4,000 BTU per hour of
the total input rating of all appliances in the enclosure.

Inlet Air

Alternate
air inlet

Equipment Located in Confined Spaces; All Air from Outdoors.
See 5.3.3-b.

4. When ducts are used, they shall be of the same cross-sectional
area as the free area of the openings to which they connect. The
minimum dimension of rectangular air ducts shall not be less
than 3 inches.

Ventilation louvers for
unheated crawl space

Equipment Located in Confined Spaces; All Air from Outdoors—
Inlet Air from Ventilated Crawl Space and Outlet Air to Ventilated
Attic. See 5.3.3-b

2. When communicating with the outdoors through vertical ducts,
each opening shall have a minimum free area of 1 square inch per
4,000 BTU per hour of total input rating of all equipment in the
enclosure.

NOTE: The single opening must have
a free area of not less than one
square inch per 3000 BTU of
the total input rating of all equipment in the enclosure, but not less than
the sum of the areas of all vent
connectors in the confined space.

Chimney or Gas Vent

Opening

Furnace

Water
Heater

Alternate
Opening
Location

Equipment Located in Confined Spaces; All Air from Outdoors Single Air Opening. See 5.3.3-b.

5. When directly communicating with the outdoors, the single opening shall have a minimum free area of 1 square inch per 3,000
BTU per hour of total input rating of all equipment in the enclosure.

LOCATION

5.3.4 Specially Engineered Installations:
The requirements of 5.3.3 shall not necessarily govern when special
engineering, approved by the authority having jurisdiction, provides an
adequate supply of air for combustion, ventilation, and dilution of flue
gases.
5.3.5 Louvers and Grilles:
In calculating free area in 5.3.3, consideration shall be given to the blocking effect of louvers, grilles or screens protecting openings. Screens used
shall not be smaller than 1/4 inch mesh. If the area through a design of
louver or grille is known, it should be used in calculating the size of
opening required to provide the free area specified. If the design and free
area is not known, it may be assumed that wood louvers will have 20-25
percent free area and metal louvers and grilles will have 60-75 percent
Horizontal Furnace
free area. Louvers and grilles shall be fixed in the open position or
interlocked with the equipment so that they are opened automatically DRAIN TRAP AND LINES
during equipment operation.
In horizontal applications the condensate drain trap is secured to the
5.3.6 Special Conditions Created by Mechanical Exhausting or Fire- furnace side panel, suspending it below the furnace. A minimum clearance of 4 3/4 inches below the furnace must be provided for the drain
places:
trap. Additionally, the appropriate downward piping slope must be mainOperation of exhaust fans, ventilation systems, clothes dryers, or firetained from the drain trap to the drain location. Refer to Condensate
places may create conditions requiring special attention to avoid unsatDrain Trap and Lines for further details. If the drain trap and drain line
isfactory operation of installed gas utilization equipment. Air from
will be exposed to temperatures near or below freezing, adequate meaInside Building. See 5.3.3-a.
sures must be taken to prevent condensate from freezing.
VI. INSTALLATION POSITIONS

LEVELING

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 be attached to the back of
the furnace. For upflow installations requiring 1,800 CFM or more,
use either two side returns or a bottom return or a combination of
side and bottom. 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.
VII. HORIZONTAL APPLICATIONS & CONSIDERATIONS

GENERAL

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 also be
level from back to front or have a slight tilt with the access doors downhill
(approximately 3/4 inches) from the back panel. The slight tilt allows
the heat exchanger condensate, generated in the recuperator coil, to
flow forward to the recuperator coil front cover.

ALTERNATE VENT/FLUE AND COMBUSTION AIR CONNECTIONS
In horizontal installations, provisions for alternate vent/flue piping is
available for upflow furnaces with left air discharge. Counterflow furnaces include provisions for both alternate vent/flue and combustion
air piping with right air discharge. These configurations allow the flue
and combustion air piping to be run vertically through the furnace. Refer to the “Recommended Installation Positions” figure for further detail. The standard piping connections may also be used in these positions. Refer to Vent/Flue Pipe and Combustion Air Pipe for details
concerning the conversion to the alternate vent/flue air connections.

Horizontal applications, in particular, may dictate many of the
installation’s specifics such as airflow direction, ductwork connec- When using the horizontal alternate vent configuration, you must
tions, flue and combustion air pipe connections, etc. The basic use the RF000142 vent drain kit. See following illustration.
application of this furnace as a horizontal furnace differs only slightly
from an upright installation. When installing a furnace horizontally,
additional consideration must be given to the following:

AIR
DISCHARGE

Bottom
Return
Duct
Connection

ALTERNATE FLUE PIPE
LOCATION

Side
Return
Duct
Connection

VIII. PROPANE GAS /HIGH ALTITUDE INSTALLATIONS

ALTERNATE FLUE AND
COMBUSTION AIR PIPE
LOCATIONS

WARNING

Side
Return
Duct
Connection

POSSIBLE PROPERTY DAMAGE, PERSONAL

Bottom
Return
Duct
Connection

AIR
DISCHARGE

UPFLOW
UPRIGHT

COUNTERFLOW
UPRIGHT
ALTERNATE FLUE AND
COMBUSTION AIR PIPE
LOCATIONS

ALTERNATE FLUE
PIPE LOCATION

Bottom
Return
Duct
Connection

AIR
DISCHARGE

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.

UPFLOW HORIZONTAL
LEFT AIR DISCHARGE

Bottom
Return
Duct
Connection

AIR
DISCHARGE

UPFLOW HORIZONTAL
RIGHT AIR DISCHARGE

Bottom
Return
Duct
Connection

For furnaces being converted to LP gas, it is strongly recommended
that a LPLP03 kit also be installed. The use of this kit will prevent
the furnace from firing when the LP gas supply pressure is too low
to support proper combustion.

AIR
DISCHARGE

COUNTERFLOW HORIZONTAL
RIGHT AIR DISCHARGE

AIR
DISCHARGE

This furnace is shipped from the factory configured for natural gas at
standard altitude. Propane gas installations require an orifice change
to compensate for the energy content difference between natural and
propane gas.

High altitude installations may require both a pressure switch and
an orifice 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 your distributor
for required kit(s).

Bottom
Return
Duct
Connection

COUNTERFLOW HORIZONTAL
LEFT AIR DISCHARGE

*MH95, ACSH96, GCH95, GCH9 GAS ORIFICE CHART
Altitude

Recommended Installation Positions
NOTE: Alternate “vertical” piping connections can not be used when
an upflow furnace is installed with supply air discharging to the
right, or when a counterflow furnace is installed with supply air
discharging to the left. In either case, use the standard flue and
combustion air piping connections.

Gas

Kit

Orifice

Manifold
Pressure

Natural

None

#43

3.5" w.c.

Propane

LPM-06*2

#55

10.0" w.c.

None

0-7000

ALTERNATE ELECTRICAL AND GAS LINE CONNECTIONS

Pressure
Switch

2 LPM-06* supports both Honeywell and White-Rodgers 2-stage valves
NOTE: In Canada, gas furnaces are certified to 4500 feet.

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.

AMEH96, GME95 GAS ORIFICE CHART
Altitude

DRAIN PAN

Gas

Kit

Orifice

Manifold
Pressure

Natural

None

#45

3.5" w.c.

Propane

LPM-06*2

#55

10.0" w.c.

None

0-7000

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).

Pressure
Switch

LPM-06* supports both Honeywell and White-Rodgers 2-stage valves
NOTE: In Canada, gas furnaces are certified to 4500 feet.

FREEZE PROTECTION
Refer to Horizontal Applications and Conditions - Drain Trap and
Lines.

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.

FURNACE SUSPENSION
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. Refer to Location Requirements and Considerations - Furnace Suspension for further details.

V
X

DIRECT VENT TERMINAL CLEARANCES
Canadian Installations

U.S. Installations

A= Clearance above grade,
veranda, porch, deck or
balcony. (See 1.24.6-i(9)b.)

12 in. (30 cm)

B= Clearance to window or
door that may be opened.

6 in. (15 cm) for appliances
10,000 Btuh (3 kW), 12 in. (30 cm) for
appliances > 10,000 Btuh (3 kW) and
100,000 Btuh (30 kW), 36 in. (91 cm)
for appliances > 100,000 Btuh (30
kW).

6 in. (15 cm) for appliances
10,000 Btuh (3 kW), 9 in. (23 cm) for
appliances > 10,000 Btuh (3 kW) and
50,000 Btuh (15 kW), 12 in. (30 cm) for
appliances > 500,000 Btuh (15 kW).

C= Clearance to permanently
closed window.

D= Vertical clearance to ventilated soffit
located above the terminal within a
horizontal distance of 2 feet (61 cm)
from the center line of the terminal.

E= Clearance to unventilated soffit.

F= Clearance to outside corner.

G= Clearance to inside corner.

H= Clearance to each side of center
line extended above meter/regulator
assembly.

3 ft. (91 cm) within a height 15 ft.
(4.5 m) above the meter/regulator
assembly.

Canadian Installations
I=

Clearance to service
regulator vent outlet.

U.S. Installations

3 ft. (91 cm).

J= Clearance to nonmechanical air
supply inlet to building or the
combustion air inlet to any other
appliance.

6 in. (15 cm) for appliances 10,000
Btuh (3 kW), 12 in. (30 cm) for
appliances > 10,000 Btuh (3kW) and
100,000 Btuh (30 kW), 36 in. (91 cm)
for appliances > 100,000 Btuh (30 kW).

6 in. (15 cm) for appliances 10,000
Btuh (3 kW), 9 in. (23 cm) for
appliances > 10,000 Btuh (3kW) and
50,000 Btuh (15 kW), 12 in. (30 cm) for
appliances > 50,000 Btuh (15 kW).

K= Clearance to a mechanical
air supply inlet.

6 ft. (1.83 m)

3 ft. (91 cm) above if within
10 ft. (3 m) horizontally.

L= Clearance above paved sidewalk or
paved driveway located on public
property.

7 ft. (2.13m) †

M= Clearance under veranda, porch,
deck or balcony.

12 in. (30 cm) ‡

In accordance with the current CSA B149.1, Natural Gas and Propane Installation Code.

In accordance with the current ANSI Z223.1/NFPA 54, National Fuel Gas Code.

†

A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single fanily dwellings and serves
both dwellings.

‡

Permitted only if veranda, porch, deck or balcony is fully open on a minimum of two sides beneath the floor.

For clearances not specified in ANSI Z223.1/NFPA 54 or CSA B149.1, the following statement shall be included:

“Clearance in accordance wtih local installation codes and the requirements of the gas supplier and the manufacturer’s installation
instruction.”

OTHER THAN DIRECT VENT TERMINAL CLEARANCES
Canadian Installations
A= Clearance above grade,

Canadian Installations1

U.S. Installations 2
12 in. (30 cm)

6 in. (15 cm) for appliances
10,000 Btuh (3 kW), 12 in. (30 cm) for

4 ft. (1.2 m) below or to side of
opening; 1 ft. (300 m) above opening.

J= Clearance to nonmechanical air
supply inlet to building or the
combustion air inlet to any other
appliance.

4 ft. (1.2 m) below or to side of
6 in. (15 cm) for appliances 10,000
opening; 1 ft. (300 m) above opening.
Btuh (3 kW), 12 in. (30 cm) for
appliances > 10,000 Btuh (3kW) and
100,000 Btuh (30 kW), 36 in. (91 cm)
for appliances > 100,000 Btuh (30 kW).

K= Clearance to a mechanical
air supply inlet.

6 ft. (1.83 m)

3 ft. (91 cm) above if within
10 ft. (3 m) horizontally.

L= Clearance above paved sidewalk or
paved driveway located on public
property.

7 ft. (2.13m) †

7 ft. (2.13m)

M= Clearance under veranda, porch,
deck or balcony.

12 in. (30 cm) ‡

veranda, porch, deck or
balcony. (See 1.24.6-i(9)b.)
B= Clearance to window or
door that may be opened.

appliances > 10,000 Btuh (3 kW) and
100,000 Btuh (30 kW), 36 in. (91 cm)
for appliances > 100,000 Btuh (30
kW).
C= Clearance to permanently

closed window.
D= Vertical clearance to ventilated soffit
located above the terminal within a
horizontal distance of 2 feet (61 cm)
from the center line of the terminal.
E= Clearance to unventilated soffit.

F= Clearance to outside corner.

G= Clearance to inside corner.

H= Clearance to each side of center

3 ft. (91 cm) within a height 15 ft.

line extended above meter/regulator
assembly.

U.S. Installations2

12 in. (30 cm)

(4.5 m) above the meter/regulator
assembly.

Clearance to sevice
regulator vent outlet.

3 ft. (91 cm).

In accordance with the current CSA B149.1, Natural Gas and Propane Installation Code.

In accordance with the current ANSI Z223.1/NFPA 54, National Fuel Gas Code.

†

A vent shall not terminate directly above a sidewalk or paveable driveway that is located between two single family dwellings and
serves both dwelling.

‡

Permitted only if veranda, porch, deck or balcony is fully open on a minimum of two sides beneath the floor.

For clearances not specified in ANSI Z223.1/NFPA 54 or CSA B149.1, the following statement shall be included:

“Clearance in accordance wtih local installation codes and the requirements of the gas supplier and the manufacturer’s installation
instruction.”

tic 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.

IX. VENT/FLUE PIPE & COMBUSTION AIR PIPE

GENERAL
WARNING
FAILURE TO FOLLOW THESE INSTRUCTIONS CAN RESULT IN BODILY
INJURY OR DEATH. CAREFULLY READ AND FOLLOW ALL
INSTRUCTIONS GIVEN IN THIS SECTION .

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.
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 pipe 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 centerline of the
other opening for 2” diameter pipe, and 4 9/16” minimum for 3”
pipe.

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.

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.
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.

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.
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. It is our recommendation that all vent/flue piping exposed to
temperatures below 35°F for extended periods of time should 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) should be insulated with 1/2” thick
closed cell foam. Inspect piping for leaks prior to installing insulation.

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
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.

Two- or 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.
The use of Schedule 40 PVC or ABS cellular core (Foam Core) plas-

VENT/FLUE PIPE

TERMINATION LOCATIONS
NOTES: 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.
•
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.
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,
ULC-S636 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.
As shipped, attachment “couplings” for vent/flue and combustion
air intake pipe connections are provided on the furnace’s top cover
(upflow) or basepan (counterflow). To use the standard connections, field supplied vent/flue pipe and combustion air intake pipe
(when applicable) should be secured directly to the furnace at these
locations.

Vent/flue pipe can be secured to the vent/flue coupling using the rubber coupling and worm gear hose clamps provided with this furnace
(see “Standard Connections” figure). The rubber coupling allows separation of the vent/flue pipe from the furnace during servicing. 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 utilizing two 45 deg.
Long-Sweep Elbows and creating an “S” joint to provide additional
space at connection locations. 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.

V
E
N
T
45 DEGREE
LONG-SWEEP
ELBOWS

Increased Clearance Configuration
NOTE: Do not use other commercially available “no hub connectors” due to possible material conflicts. The vent/flue pipe can also
be secured using a PVC or ABS elbow or coupling using the appropriate glue (see Section IX, Materials and Joining Methods).
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.

COMBUSTION AIR PIPE
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. NOTE: Because of probable material
conflicts, do not use other commercially available “no hub connectors”. The combustion air intake pipe can also be secured directly to
the counterflow unit air intake pipe coupling.
NON-DIRECT VENT INSTALLATIONS
A minimum of one 90° elbow should be installed on the combustion air
intake “coupling” to guard against inadvertent blockage.

COMBUSTION
AIR PIPE
(DIRECT VENT ONLY)

VENT/FLUE
PIPE

FLANGE
3.75"

90º PVC
ELBOW
(NON-DIRECT VENT)

RUBBER
COUPLING
WITH WORM
GEAR CLAMPS

90º PVC
ELBOW
(NON-DIRECT VENT)

RUBBER
COUPLINGS
WITH WORM
GEAR CLAMPS

CUT HERE

UPFLOW

Vent/Flue Pipe Cuts
5. Remove plastic plug from alternate vent/flue location. Relocate
and install plug in standard vent/flue location (top cover).
Counterflow units.
Remove plastic plug from alternate vent/flue location. Relocate
and install plug in standard vent/flue location (basepan). Plug
remaining hole in blower deck with plastic plug included in the
drain kit bag.
6. Upflow and Counterflow units.
Insert cut section of vent/flue pipe and coupling into alternate
vent/flue location. Using a rubber coupling and worm gear
hose clamps from the drain kit bag, attach the vent/flue pipe
and coupling to the induced draft blower. Secure the coupling
to the cabinet using the screws removed in step 1 or with
field-supplied 3/8” #8 self drilling screws.

COUNTERFLOW

STANDARD CONNECTIONS

ALTERNATE FURNACE CONNECTIONS
If the standard locations are undesirable for a specific installation,
alternate side panel locations are available on the upflow models for
the vent/flue. Counterflow furnaces include provisions for both alternate vent/flue and combustion air piping. These locations may be of
particular benefit to upright upflow installations requiring additional
access to an A coil, or to upright counterflow installations requiring
additional access to a filter or electronic air cleaner, or to horizontal
installations desiring vent/flue (upflow and counterflow) and combustion air intake (counterflow only) piping run vertically from the side of
the cabinet.
NOTE: Standard and alternate locations can be combined (i.e., an
installation may use the standard combustion air intake location
but use the alternate vent/flue location), if needed.

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
FIELD-SUPPLIED VENT/FLUE PIPING, AS DAMAGE CAN RESULT IN
LEAKS CAUSING BODILY INJURY OR DEATH DUE TO EXPOSURE TO
FLUE GASES, INCLUDING CARBON MONOXIDE.

WARNING
EDGES OF SHEET

METAL HOLES MAY BE SHARP.
PRECAUTION WHEN REMOVING HOLE PLUGS.

USE GLOVES AS A

7. Upflow and Counterflow units.
For upright installations, externally mount the rubber elbow
to the vent/flue coupling using a worm gear hose clamp.
Secure field supplied vent/flue piping to the rubber elbow
using a worm gear hose clamp. NOTE: Use of the alternate
vent/flue location for upright installations, requires the drain
trap be installed on the same side of the unit as the flue
pipe.
8. Upflow and Counterflow units.
For horizontal installations, externally secure the fieldsupplied vent/flue pipe directly to the vent/flue coupling
using a PVC or ABS coupling or elbow.

ALTERNATE VENT/FLUE LOCATION
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, the “Vent/Flue Pipe Cuts”
figure, and the “Alternate Vent/Flue Location” figure.
NOTE: Counterflow instructions follow the upflow instructions.
1. Remove and save the four screws securing the vent/flue
coupling to the furnace top panel.
Counterflow units.
1. Remove and save the four screws securing the vent/flue
coupling to the furnace basepan. Also remove the three
screws securing the furnace’s internal vent/flue piping to
the blower deck.
2. Upflow and Counterflow units.
Loosen the worm gear hose clamps on the rubber elbow
and detach it from both the induced draft blower and the
vent/flue pipe.
3. Upflow and Counterflow units.
Remove the vent/flue pipe from the furnace.
4. Cut the vent/flue pipe 3.75 inches from the flanged end of
the pipe. See Vent/Flue Pipe Cuts figure. The section of
pipe attached to the coupling will reach through the side
panel to the induced draft blower. Discard remaining pipe
and elbows.
Counterflow units.
Cut the vent/flue pipe 3.75 inches from the blower deck
coupling. See Vent/Flue Pipe Cuts figure. Save vent/flue pipe
attached to blower deck coupling for use in the alternate
location. Discard remaining pipe and elbows.

3
REMOVE
PIPE

1
REMOVE
4 SCREWS

1.
REMOVE
4 SCREWS

4
CUT PIPE PER
VENT/FLUE
PIPE CUTS
DIAGRAM

3
REMOVE
PIPE

4
CUT PIPE PER
VENT/FLUE PIPE CUTS
DIAGRAM

1
REMOVE
3 SCREWS

5
REMOVE
AND RELOCATE

2
DETACH RUBBER
ELBOW FROM
ID BLOWER AND
VENT/FLUE
PIPE

UPFLOW

COUNTERFLOW

2
DETACH RUBBER
ELBOW FROM
ID BLOWER AND
VENT/FLUE
PIPE

*MH95/ACSH96/AMEH96/GCH95/GME95

5
ADDITIONAL PLUG
FROM DRAIN KIT

Direct Vent (2 - Pipe) and Non-Direct Ve nt (1- Pipe)

(6)

Maximum Allowable Length of Vent/Flue Pipe & Combustion Air Pipe (ft)
7
EXTERNALLY
MOUNT
RUBBER ELBOW

Unit Input
(Btu)

6
SECURE TO
ID BLOWER WITH
RUBBER COUPLING
AND HOSE
CLAMPS

40,000
45,000
60,000

COUNTERFLOW/UPRIGHT
(UPFLOW SIMILAR)
6
SECURE TO
ID BLOWER WITH
RUBBER COUPLING
AND HOSE
CLAMPS

70,000
80,000

6
SECURE TO
CABINET WITH
SCREWS

UPFLOW/HORIZONTAL
(COUNTERFLOW SIMILAR)

Alternate Vent/Flue Location

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.
For details concerning connection of the vent/flue pipe to the furnace, refer to Vent/Flue Pipe and Combustion Air - Standard Furnace Connections or Alternate Furnace Connections for specific
details. Refer to the following Non-Direct Vent (Single Pipe) Piping
- Vent/Flue Pipe Terminations for specific details on termination
construction.
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. This elbow will guard against inadvertent blockage of the air intake.

VENT/FLUE PIPE LENGTHS

AND

DIAMETERS

Refer to the following table for applicable length, elbows, and pipe
diameter for construction of the vent/flue pipe system of a nondirect 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.

Pipe
Size (4)
(in.)

2
or 2 1/2
2
or 2 1/2
2
or 2 1/2
2
or 2 1/2
2
or 2 1/2

Num ber of Elbows

(1) (2)

(3) (5)

100

250

245

240

235

230

225

220

215

210

110

105

100

220

215

210

205

200

195

190

185

180

80,000

132

125

118

111

104

90,000

2
or 2 1/2

Not Applicable
90

Not Applicable

90,000

147

140

133

126

119

112

105

100,000

91
42

115,000

140

133

126

119

112

105

1) Maximum allowable limits listed on individual lengths for inlet and flue and
NOT a combination.
2) Minimum requirement for each vent pipe is five (5) feet in length and one
elbow/tee.
3) Tee used in the vent/flue termination must be included when determining
the number of elbows in the piping system.
4) 2 1/2” or 3” diameter pipe can be used in place of 2” diameter pipe.
5) Increased Clearance Configurations using (2) 45 deg. Long Sweep
elbows should be considered equivalent to one 90 deg. elbow.
6) One 90° elbow should be secured to the combustion air intake connection.

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 Section IX, Vent/Flue Pipe and Combustion Air Pipe - Termination Locations for details concerning location restrictions. A 2 3/8” diameter wall penetration is required for
2” diameter pipe. A 3” diameter hole is required for a 2 1/2” pipe
and a 3 1/2” diameter hole is required for 3” diameter 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.
In a basement installation, the vent/flue pipe can be run between
joist spaces. If the vent pipe must go below a joist and then up into
the last joist space to penetrate the header, two 45° elbows should be
used to reach the header rather than two 90° elbows.
NOTE: Terminate both pipes in the same pressure zone (same
side of roof, no major obstacles between pipes, etc.)

VENT/FLUE

TEE (OPTIONAL)

COMBUSTION AIR INTAKE
(OPTIONAL)

12” MIN
HEIGHT DIFFERENCE
BETWEEN
INTAKE AND VENT

*Not required for
single pipe installation

O
RO

INE

INTAKE
SCREEN
OPTIONAL

.
AX
”M
6
9

AND

COMBUSTION AIR PIPE LENGTHS

AND

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 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.
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.

IN.
”M
3
-

VENT/FLUE

12” MIN TO ROOF OR HIGHEST
ANTICIPATED SNOW LEVEL

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.
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.

ELBOWS

STRAIGHT

Horizontal terminations should be as shown in the following figure. Refer to Vent/Flue Pipe and Combustion Pipe - Termination
Location for location restrictions. A 2 3/8” diameter wall penetration is required for 2” diameter pipe. A 3” diameter hole is required
for a 2 1/2” pipe and a 3 1/2” diameter hole is required for 3” diameter
pipe. The wall penetration should be sealed with silicone caulking
material.

_______________
12" MIN.

VENT/FLUE TEE (OPTIONAL)
or
45° ELBOW
TURNED DOWN or
90° ELBOW TURNED
DOWN

10”- 24”

6” MAX

12" MIN. ABOVE
HIGHEST ANTICIPATED
SNOW LEVEL

4” MIN

90º OR 45°
ELBOW

Horizontal Termination (Single Pipe)
Above Highest Anticipated Snow Level

SCREEN
(OPTIONAL)

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. 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.

12" MIN. TO GRADE OR
HIGHEST ANTICIPATED
SNOW LEVEL

Standard Horizontal Terminations (Dual Pipe)
Vent & Combustion Air Intake Measurements for Standard Horizontal Terminations (Dual Pipe)
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.

90°
ELBOWS

3” - 24”

3” - 24”
12” MIN SEPARATION
3” MIN

AIR
INTAKE
SCREEN
(OPTIONAL)

OPTIONAL
INTAKE
SCREENS

12" MIN. ABOVE
HIGHEST ANTICIPATED
SNOW LEVEL

12” MIN TO GRADE OR HIGHEST
ANTICIPATED SNOW LEVEL

Termination of Multiple Direct Vent Furnaces
Alternate Horizontal Vent Termination (Dual Pipe)

CONCENTRIC VENT TERMINATION
Refer to the directions provided with the Concentric Vent Kit (DCVK)
for installation specifications.

90°
ELBOWS

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. This kit is NOT intended for use with single pipe (indirect
vent) installations.
Refer to the directions furnished with the Side Wall Vent Kit (p/n
0170K00000S) for installation specifications.

3”-24” BETWEEN PIPES
AIR
INTAKE
SCREEN

X. CONDENSATE DRAIN LINES & DRAIN TRAP

(OPTIONAL)

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.
The condensate which is generated must be piped to an appropriate drain location.
In upright installations, the furnace’s drain hoses may exit either
the right or left side of the furnace. NOTE: If the alternate vent/flue
outlet is utilized in an upright installation, the drain trap and drain
connections must be located on the same side as the alternate
vent/flue outlet.
In horizontal installations, the drain hoses will exit through the
bottom (down side) of the unit with the drain trap suspended beneath the furnace. The field-supplied drain system must be in
accordance with all local codes and the instructions in the following sections.

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)
In a basement installation, the pipes may be run between the joist
spaces. If the pipes must go below the joist and then up into the
last joist space to penetrate the header, two 45° elbows should be
used to reach the header rather than two 90° elbows.

VENT/INTAKE TERMINATIONS FOR INSTALLATION OF MULTIPLE
DIRECT VENT FURNACES

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 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 more than one direct vent furnace is to be installed vertically
through a common roof top, maintain the same minimum clearances between the exhaust vent and air intake terminations of
adjacent units as with the exhaust vent and air intake terminations
of a single unit.
If more than one direct vent furnace is to be installed horizontally
through a common side wall, maintain the clearances as in the
following figure. Always terminate all exhaust vent outlets at the
same elevation and always terminate all air intakes at the same
elevation.

•

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.

In a upright installation drain hoses are connected to drain ports on the
rubber elbow and the recuperator coil front cover. The drain lines are
then routed through the right side panel and into the drain trap secured
to the outside of the cabinet.
NOTE: Refer to Alternate Vent/Flue Hose Connections for upright
installations using an alternate vent/flue outlet.
NOTE: In vertical installations, air conditioning coil condensate may 1. Remove the rubber plug from the right side of the front cover
drain port.
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 2. Secure Hose A to front cover drain port with a red hose
clamp. Route hose to rear side panel grommet hole.
level of the furnace trap.
3. Cut and remove 1/4 inch from the end of the drain port on
STANDARD RIGHT OR LEFT SIDE DRAIN HOSE CONNECTIONS
the rubber elbow.
4.
Insert Tube 1 into rubber elbow drain port and secure with
All installations positions require the use of the drain trap, hoses, tubes,
silver hose clamp. Angle tube outward toward front of
and clamps. The following quantity of hoses, tubes, and hose clamps
furnace.
are provided with the unit.
5. Cut 17 3/4 inches from the long end of Hose B and discard.
Secure the remaining hose to Tube 1 with a green hose
HOSE A
clamp. Route the other end of Hose B to front right side
QTY: 1
panel grommet hole.
For details concerning mounting of the drain trap, refer to Vertical
HOSE B Drain Trap Mounting.
QTY: 1

DRAIN TRAP
QTY: 1

6. Insert short end of each of tube 2 through side panel
grommet holes. Secure tubes to hoses A and B with green
hose clamps. Ensure hoses and tubes maintain a
downward slope for proper drainage and that they are not
kinked or binding.

TUBE 1
QTY: 1

GREEN
HOSE CLAMPS
QTY: 3
RED
HOSE CLAMP
QTY: 1

TUBE 2
QTY: 2
SILVER
HOSE CLAMP
QTY: 1

Hose and Tube Identification

RIGHT SIDE
PANEL
RUBBER
ELBOW
RUBBER ELBOW
DRAIN PORT
SILVER HOSE CLAMP
TUBE 1
HOSE
B

SIDE PANEL
GROMMET
HOLES
TUBE(S) 2

RED HOSE
FRONT
CLAMP
COVER
DRAIN PORT

HOSE
A GREEN
HOSE
CLAMPS
(3 PLACES)

Upright “Standard” Connections -Right Side
(Upflow Shown, Counterflow Similar)
21

DRAIN
TRAP

ALTERNATE VENT/FLUE DRAIN HOSE CONNECTIONS
Upright installations using the alternate vent/flue outlet will require
“right-side only” drain hoses to be connected as follows. Refer to
Vent/Flue Pipe and Combustion Air Pipe for details on alternate
vent/flue pipe connection.
1. Remove the rubber plug from the right-side drain port on
the front cover . Save for use in step 3.
2. Secure Hose A to front cover drain port with a red hose
clamp. Route hose to rear right side panel grommet hole.
3. Remove grommet from front right-side panel drain hole.
Seal hole in grommet with large end of plug. Reinstall
grommet and plug into side panel drain hole.
4. Cut 1/4 inch from the end of the drain port on the externally
mounted rubber elbow. Discard cut portion.

5. Insert Tube 1 into rubber elbow drain port and secure with a
silver hose clamp. Angle tube toward trap.
6. Cut 17 3/4 inches from the long end of Hose B and discard.
7. Secure straight end of Hose B to exposed end of Tube 1
with a green hose clamp. Route hose toward right side
panel grommet holes.
8. Insert short end of one Tube 2 through rear right side panel
grommet drain hole. Secure tube to Hose A with a green
hose clamp.
9. Insert short end of remaining Tube 2 into Hose B from
rubber elbow and secure with green hose clamp. Ensure
hoses and tubes maintain a downward slope for proper
drainage and are not kinked or binding.

RUBBER ELBOW
(EXTERNALLY
MOUNTED)

RUBBER
ELBOW
DRAIN PORT

FRONT
COVER
DRAIN
PORT

HOSE B
SILVER HOSE CLAMP
TUBE 1
GREEN HOSE
CLAMPS
(3 PLACES)
RED HOSE
CLAMP

HOSE A
TUBE(S) 2

DRAIN TRAP

Upright “Alternate: Connections - Right Side Only
(Upflow Shown, Counterflow Similar)

4. Insert Tube 1 into rubber elbow drain port and secure with silver
hose clamp. Angle tube outward toward front of furnace.
5. Cut “X” inches from the long end of Hose B and discard. Refer
to table for appropriate length to cut. Secure remaining hose
to Tube 1 with a green hose clamp. Route other end of Hose B
to front left side panel grommet hole.

UPRIGHT INSTALLATIONS-TRAP ON LEFT SIDE
NOTE: For left side trap installation, grommets must be moved to
the left side of the furnace and the plugs installed on the right side
of the furnace.
1. Remove the rubber plug from the left side drain port on the
front cover.
2. Secure Hose A to front cover drain port with a red hose
clamp. Route hose to rear side panel grommet hole.
3. Cut and remove 1/4 inch from the end of the drain port on
the rubber elbow.

NOTE: Long hose “B” must always be connected to Tube 1 and
the elbow and not on the front cover.
6. Insert short end of each Tube 2 through side panel grommet
holes. Secure tubes to Hose A and Hose B with green hose
clamps. Ensure hoses and tubes maintain a downward
slope for proper drainage and that they are not kinked or
binding.

LEFT
SIDE PANEL
FRONT COVER
DRAIN PORT

RUBBER
ELBOW

RED HOSE
CLAMP

RUBBER
ELBOW
DRAIN PORT

HOSE A

SILVER HOSE
CLAMP

SIDE PANEL
DRAIN
HOLES

TUBE 1

TUBE(S) 2
GREEN HOSE
CLAMP
DRAIN
TRAP

GREEN
HOSE CLAMP

HOSE B

Upright “Standard” Connections - Left Side
(Upflow Shown, Counterflow Similar)

Cabinet Width
(inches)

Models
(kBTU_Tons)

"X" Length to Cut From Long
End of Hose B
(inches)

17 1/2

040_3, 045_30,
060_3

070_40, 080_5

3 1/2

24 1/2

090_50, 100_5
115_50

None

UPRIGHT DRAIN TRAP MOUNTING (LEFT OR RIGHT SIDE PANEL)
1. Insert drain tubes into drain trap and position the drain trap
against the side panel. NOTE: Drain tubes must reach the
bottom of the drain trap.
2. Secure drain trap to side panel at the mounting holes
(dimples or crosshairs on counterflow models) located
below the grommet drain holes.
3. Attach PVC drain line to drain trap outlet with either a 90°
elbow or coupling.

HORIZONTAL INSTALLATIONS
RIGHT SIDE DOWN
Horizontal installations with the right side down require that the
drain hoses be connected to the right side front cover drain port
and the rubber elbow drain port.
NOTE: On counterflow models, relocation of the front cover pressure
switch hose is required.

Make connections as follows:
1. Remove the rubber plug from right side of the front cover drain
port.
Counterflow furnaces
Relocate the front cover pressure switch hose connection
from the left side pressure tap to the right (down) side tap.
The pressure switch hose must be connected to the down
side to guard against blocked drain conditions. Cut hose
to appropriate length to minimize sagging. Plug left (unused)
pressure tap with plug removed from right side.
2. Secure Hose A to front cover drain tap with a red hose clamp.
Route hose to rear right (down) side panel grommet holes.
3. Cut 1/4 inch from the end of the drain port on the rubber
elbow and discard.
4. Insert Tube 1 into rubber elbow drain port and secure with a
silver hose clamp. Angle tube outward toward front of furnace.
5. Cut 17 3/4 inches from the long end of Hose B and discard.
6. Secure remaining end of Hose B to exposed end of Tube 1
with a green hose clamp. Route hose to front right down
side panel grommet holes.
7. Cut 5 1/2 inches straight length from the long end of each
Tube 2 and discard the radius pieces.
8. Insert approximately one inch of each Tube 2 through the
right down side panel grommet holes. Secure tubes to
Hose A and Hose B using green hose clamps. Ensure
hoses and tubes maintain a downward slope for proper
drainage and are not kinked or bound.
For details concerning mounting of the drain trap, refer to Condensate Drain Lines and Drain Trap - Horizontal Drain Trap Mounting.

FRONT COVER
DRAIN PORT
RED HOSE
CLAMP
HOSE A
FRONT
COVER
PRESSURE
TAP

HOSE B

RIGHT
SIDE
PANEL

TUBES 2

DRAIN TRAP

RUBBER
ELBOW

GREEN
HOSE TUBE 1
CLAMP
(3 PLACES)

RUBBER ELBOW
DRAIN PORT
SILVER HOSE
CLAMP

Horizontal Connections - Right Side Down
(Upflow Shown, Counterflow Similar)

4. Remove the rubber cap from the side drain port on the rubber
elbow.
Horizontal installations with the left side panel down will require
5. Secure the short end of Hose B to rubber elbow side drain
drain hoses to be connected to the left side front cover drain port
port using a green hose clamp. NOTE: For left side drainage,
and the side drain port on the rubber elbow.
route hose to far left (down) side panel grommet holes.
NOTE: Horizontal left side connections (when using new
1. Remove the rubber plug from the front cover left (down)
side port drain elbow) does not require connecting a hose
side drain port.
to the induced draft blower housing.
2. Relocate the front cover pressure switch hose connection
6. Cut 5 1/2 inches straight length from the long end of each
from the right side (as shipped) pressure tap to the left
Tube 2 and discard radius ends.
(down) side tap. The pressure switch hose must be
connected to the down side to guard against blocked drain
7. Insert approximately one inch of each Tube 2 through left
conditions. Cut hose to appropriate length to minimize
side panel grommet hole. Secure tubes to Hose A and
sagging. Plug right (unused) pressure tap with plug
Hose B with a green hose clamps. NOTE: Tube must
removed from left side.
reach bottom of trap. Ensure hoses and tubes maintain a
downward slope for proper drainage and that they are not kinked
3. Secure Hose A to front cover drain port with a red hose clamp.
or binding.
Route hose to rear left (down) side panel grommet holes.
NOTE: For left side drainage, grommets must be relocated to
For details concerning mounting of the drain trap, refer to Condenleft side panel.
sate Drain Lines and Drain Trap - Horizontal Drain Trap Mounting.

LEFT SIDE DOWN

GREEN HOSE
CLAMP

HOSE B
FRONT
COVER
PRESSURE
TAP

HOSE A

GREEN HOSE
CLAMP

LEFT SIDE
PANEL

TUBE(S) 2

FRONT COVER
DRAIN PORT

DRAIN TRAP

RED HOSE CLAMP
SIDE PANEL
GROMMET
HOLES
Horizontal Connections - Left Side Down
(Upflow Shown, Counterflow Similar)

HORIZONTAL DRAIN TRAP MOUNTING (LEFT OR RIGHT SIDE PANEL)
1. Position the drain trap against side panel with drain tubes inserted into trap. Note that the trap may be orientated with the outlet
facing either the furnace’s top cover or base pan.
2. Secure drain trap to side panel at the dimples or crosshairs located on either side of the grommet drain holes.
3. Confirm that tubes reach bottom of drain trap and that all hoses maintain a downward slope and are not kinked or binding.
4. Attach PVC drain line to drain trap outlet with either a 90° elbow or coupling.
25

Line voltage connections can be made through either the right or left
side panel. The furnace is shipped configured for a left side (right 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, observe the following steps.

XI. ELECTRICAL CONNECTIONS

WARNING
HIGH VOLTAGE!
TO AVOID THE RISK OF ELECTRICAL SHOCK, WIRING TO
THE UNIT MUST BE POLARIZED AND GROUNDED.

JUNCTION BOX RELOCATION
WARNING

WARNING

HIGH VOLTAGE!
TO AVOID PERSONAL INJURY OR DEATH DUE TO
ELECTRICAL SHOCK, DISCONNECT ELECTRICAL POWER

EDGES OF SHEET

METAL HOLES MAY BE SHARP.
PRECAUTION WHEN REMOVING HOLE PLUGS.

BEFORE SERVICING OR CHANGING ANY ELECTRICAL
WIRING.

USE GLOVES AS A

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.

WIRING HARNESS

LABEL ALL WIRES PRIOR TO DISCONNECTION WHEN SERVICING
CONTROLS. WIRING ERRORS CAN CAUSE IMPROPER AND
DANGEROUS OPERATION. VERIFY PROPER OPERATION AFTER
SERVICING.

CAUTION

*
*
*

*
*

STANDARD
JUNCTION BOX
LOCATION

The wiring harness is an integral part of this furnace. Field alteration to comply with electrical codes should not be required. 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 copper conductor.

ALTERNATE
JUNCTION BOX
LOCATION

Junction Box Relocation

115 VOLT LINE CONNECTIONS

Before proceeding with electrical connections, ensure that the supWARNING
ply voltage, frequency, and phase correspond to that specified on
the unit rating plate. Power supply to the furnace must be N.E.C.
HIGH VOLTAGE!
Class 1, and must comply with all applicable codes. The furnace
TO AVOID THE RISK OF INJURY, ELECTRICAL SHOCK OR
must be electrically grounded in accordance with local codes or, in
DEATH, THE FURNACE MUST BE ELECTRICALLY
their absence, with the latest edition of The National Electric Code,
GROUNDED IN ACCORDANCE WITH LOCAL CODES OR IN
ANSI NFPA 70 and/or The Canadian Electric Code CSA C22.1.
THEIR ABSENCE, WITH THE LATEST EDITION OF THE
Use a separate fused branch electrical circuit containing properly
NATIONAL ELECTRIC CODE.
sized wire, and fuse or circuit breaker. The fuse or circuit breaker
must be sized in accordance with the maximum overcurrent pro- To ensure proper unit grounding, the ground wire should run from
tection specified on the unit rating plate. An electrical disconnect the furnace ground screw located inside the furnace junction box
all the way back to the electrical panel. NOTE: Do not use gas
must be provided at the furnace location.
piping as an electrical ground. To confirm proper unit grounding,
NOTE: Line polarity must be observed when making field turn off the electrical power and perform the following check.
connections.
1. Measure resistance between the neutral (white) connection
and one of the burners.
Connect hot, neutral, and ground wires as shown in the wiring
2.
Resistance should measure 10 ohms or less. This furnace
diagram located on the unit’s blower door. For direct vent applicais equipped with a blower door interlock switch which
tions, the cabinet opening to the junction box must be sealed air
interrupts unit voltage when the blower door is opened for
tight using either a UL approved bushing such as Heyco Liquid
servicing. Do not defeat this switch.
Tight or by applying a UL approved non-reactive sealant to bushing.
Line polarity must be observed when making field connections.

24 VOLT THERMOSTAT WIRING
NOTE: Wire routing must not interfere with circulator blower
operation, filter removal, or routine maintenance.

ECO-TECH
MOTOR

Y
W

R
G

C
HEATING
ROOM
THERMOSTAT

FURNACE

Hi-Heat

Cool

Lo-Heat

Field
Supplied
Relay

R
R

Furnace
Control

Line-H

Low voltage connections can be made through either the right or left
side panel. Thermostat wiring entrance holes are located in the blower
compartment. Wire routing must not to interfere with circulator blower
operation, filter removal, or routine maintenance. Refer to the following figure for thermostat connections to the integrated control module
terminal strip.

Y
C

REMOTE
CONDENSING
UNIT

Heating/Cooling
Room Thermostat

C
HEATING AND
COOLING ROOM
THERMOSTAT

FURNACE

Thermostat Diagram
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.

GME95/AMEH96 FURNACE WITH 2-STAGE CONDENSER
FIELD WIRING

Remote Condensing Unit

Field Wiring for GME95 /AMEH96 Furnacewith 2-Stage
Condenser

115 VOLT LINE CONNECTION OF ACCESSORIES (ELECTRONIC
AIR CLEANER)
WARNING

The GME95/AMEH96 model furnaces may be used with a 2-stage
outdoor air conditioner. A two stage cooling/single stage gas heat thermostat is required, in addition to a field supplied relay. The relay must
have a 24VAC coil and contacts rated for up to 1 horse power at
125VAC.
1. Install the field supplied relay on the control mounting panel
near the furnace ignition control. The relay should be installed
such that the motor leads will reach the relay contact terminals.
2. Connect the “Y2” (high stage cool) thermostat terminal to one
coil terminal of the field supplied relay. Connect the other field
supplied relay coil terminal to the “C” terminal on the furnace
ignition control. Typical 18AWG thermostat wire may be used.
3. Connect the common terminal of the field supplied relay to the
“LINE-H” terminal on the furnace ignition control. Use wiring
having copper conductors only and a temperature rating of at
least 105°C.
4. Using the GME95/AMEH96 airflow tables in this manual,
determine the motor speed tap needed to deliver the required
high stage cooling airflow. Connect the selected motor speed
tap to the normally open terminal on the field supplied relay.
Use wiring having copper conductors only and a temperature
rating of at least 105°C.
5. See the following wiring schematic.

HIGH VOLTAGE!
TO AVOID PERSONAL INJURY OR DEATH DUE TO
ELECTRICAL SHOCK, DISCONNECT ELECTRICAL POWER
BEFORE SERVICING OR CHANGING ANY ELECTRICAL
WIRING.

The furnace’s integrated control module is equipped with line voltage
accessory terminals for controlling power to an optional field-supplied
electronic air cleaner.
The accessory load specifications are as follows:

Electronic Air Cleaner

1.0 Amp maximum at 120 VAC

Turn OFF power to the furnace before installing any accessories.
Follow the air cleaner manufacturers’ instructions for locating, mounting, grounding, and controlling these accessories. Accessory wiring
connections are to be made through the 1/4" quick connect terminals
provided on the furnace integrated control module. The electronic air
cleaner hot terminal is identified as EAC-H. The electronic air cleaner
neutral terminal is identified as LINE NEUTRAL. All field wiring must
conform to applicable codes. Connections should be made as shown
below.
OPTIONAL
ACCESSORIES
ELECTRONIC
AIR CLEANER

120 VAC
HOT AND
PARK
TERMINALS
120 VAC
NEUTRAL
TERMINALS

INTEGRATED
CONTROL
MODULE

12 PIN
CONNECTOR

Accessories Wiring

If it is necessary for the installer to supply additional line voltage wiring
to the inside of the furnace, the wiring must conform to all local codes,
and have a minimum temperature rating of 105°C. All line voltage wire
splices must be made inside the furnace junction box.
The integrated control module electronic air cleaner terminals (EAC)
are energized with 115 volts whenever the circulator blower is energized.

24 VOLT HUMIDIFIER

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. Contact your distributor for a
tabular listing of appropriate altitude ranges and corresponding
manufacturer’s pressure switch kits.

The yellow wire connected to the I.D. Blower pressure switch is
powered anytime the pressure switch is closed and provides 24
VAC humidifier control. Remove the yellow wire and connect a field PROPANE GAS CONVERSION
supplied jumper wire with a “piggyback” terminal to the pressure
switch terminal. Reconnect the yellow wire to the “piggyback” terWARNING
minal on the jumper wire and then connect the 24 VAC line of the
humidifier to the stripped end of the jumper wire. Using a wire nut
POSSIBLE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH MAY
or a field-supplied quick connect terminal can make this connecOCCUR IF THE CORRECT CONVERSION KITS ARE NOT INSTALLED. THE
tion. The wiring must conform to all local and national codes. ConAPPROPRIATE KITS MUST BE APPLIED TO ENSURE SAFE AND PROPER
nect the COM side of the humidifier to the B/C terminal on the
FURNACE OPERATION. ALL CONVERSIONS MUST BE PERFORMED BY
furnace control board (or to the COM side of the 24 VAC transA QUALIFIED INSTALLER OR SERVICE AGENCY.
former). DO NOT CONNECT 115V HUMIDIFIER TO THESE TERMIThis unit is configured for natural gas. The appropriate
NALS.
manufacturer’s propane gas conversion kit, must be applied for
propane gas installations. Refer to the Section VIII, Propane Gas
XII. GAS SUPPLY AND PIPING
/ High Altitude Installations section for details.
GENERAL
Consult the furnace Specification Sheet for a listing of appropirate
The furnace rating plate includes the approved furnace gas input
kits. The indicated kits must be used to insure safe and proper
rating and gas types. The furnace must be equipped to operate on
furnace operation. All conversions must be performed by a qualithe type of gas applied. This includes any conversion kits required
fied installer or service agency.
for alternate fuels and/or high altitude.

GAS VALVE

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.

Inlet gas supply pressures must be maintained within the ranges
specified below. 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.

Natural Gas
Propane Gas

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 Section XIV, Startup Procedure & Adjustment for use of this control during start up and shut
down periods.

GAS PIPING CONNECTIONS

Inlet Gas Supply Pressure
Minimum: 4.5" w.c.
Maximum: 10.0" w.c.
Minimum: 11.0" w.c.
Maximum: 13.0" w.c.

GENERAL

HIGH ALTITUDE DERATE

CAUTION

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. Contact your
distributor for a tabular listing of appropriate altitude ranges and
corresponding manufacturer’s high altitude (Natural, Propane Gas,
and/or Pressure Switch) 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.

TO AVOID POSSIBLE UNSATISFACTORY OPERATION OR EQUIPMENT DAMAGE
DUE TO UNDERFIRING OF EQUIPMENT, USE THE PROPER SIZE OF
NATURAL/PROPANE GAS PIPING NEEDED WHEN RUNNING PIPE FROM THE
METER/TANK TO THE FURNACE.

When sizing a trunk line, be sure to include all appliances which
will operate simultaneously.
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.

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)

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.

1 1/2"
1600
1100
980
760
670
610
560
530
490
460

•

Use listed gas appliance connectors in accordance with their
instructions. Connectors must be fully in the same room as
the furnace.

•

Protect connectors and semi-rigid tubing against physical and
thermal damage when installed. Ensure aluminum-alloy tubing
and connectors are coated to protect against external corrosion
when in contact with masonry, plaster, or insulation, or subjected
to repeated wetting by liquids such as water (except rain water),
detergents, or sewage.
GAS VALVE
MANIFOLD

CFH = BTUH Furnace Input
Heating Value of Gas (BTU/Cubic Foot)

PIPE
UNION

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.

•

GAS LINE

Use pipe joint compound on male threads ONLY. Always
use pipe joint compound (pipe dope) that is APPROVED
FOR ALL GASES. DO NOT apply compound to the first two
threads.

•
•

Use ground joint unions.

•

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.

ALTERNATE
UNION
LOCATION

MANUAL
SHUT OFF VALVE
(UPSTREAM FROM
PIPE UNION)

GROMMET IN
GAS LINE
HOLE

HEIGHT REQUIRED
BY LOCAL CODE

GROMMET
IN STANDARD
GAS LINE HOLE

Use black iron or steel pipe and fittings for building piping.
Where possible, use new pipe that is properly chamfered,
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.

•

BURNERS

DRIP LEG

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 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.

GROMMET IN
ALTERNATE
GAS LINE
HOLE

DRIP LEG

BURNERS

Connect the furnace to the building piping by one of the
following methods:

–
–

GAS VALVE

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,
29

Gas Piping Connections

MANUAL SHUT-OFF VALVE
(UPSTREAM FROM GROUND
JOINT PIPE UNION)
GROUND
JOINT
PIPE
UNION

ALTERNATE
UNION
LOCATION

WARNING
DRIP LEG

EDGES OF SHEET METAL HOLES MAY BE SHARP. USE GLOVES AS A
PRECAUTION WHEN REMOVING HOLE PLUGS.

GROMMET IN STANDARD
GAS LINE HOLE

GAS VALVE
BURNERS

DIRECT/STANDARD INLET PIPING
When gas piping enters directly to the gas valve through the standard
inlet hole, the installer must supply straight pipe with a ground joint
union to reach the exterior of the furnace. The rigid pipe must be 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.

INDIRECT/ALTERNATE INLET PIPING

DRAIN TRAP

MANIFOLD
ALTERNATE GAS
LINE LOCATION

When gas piping enters indirectly to the gas valve through the
alternate gas inlet hole, the following 1/2 inch pipe fittings (starting
from the gas valve) to reach the outside of the cabinet must be
supplied:
• (1) Close nipple

•
•
•
•
•

GROMMET IN ALTERNATE
GAS LINE HOLE

HORIZONTAL [UPFLOW MODEL]

GROUND
JOINT
PIPE
UNION

ALTERNATE
UNION
LO CATION

(1) 90 degree street elbow
(1) 2 1/2” pipe nipple
(1) 90 degree elbow
Straight Pipe
The straight pipe must be long enough to reach the outside of
the cabinet so as to seal the grommet cabinet penetration and
to install the ground joint union outside the cabinet. A semi-rigid
connector to the gas piping can be used outside the cabinet
per local codes.

GAS PIPING CHECKS
Before placing unit in operation, leak test the unit and gas connections.

GAS VALVE

WARNING

BURNERS

TO AVOID THE POSSIBILITY OF EXPLOSION OR FIRE, NEVER USE A
MATCH OR OPEN FLAME TO TEST FOR LEAKS.

Check for leaks using an approved chloride-free soap and water
solution, an electronic combustible gas detector, or other approved
testing methods.
NOTE: Never exceed specified pressures for testing. Higher
pressure may damage the gas valve and cause subsequent
overfiring, resulting in heat exchanger failure.

DRAIN TRAP

MANIFOLD
ALTERNATE GAS
LINE LOCATION

GORMMET IN ALTERNATE
GAS LINE HOLE

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).

HORIZONTAL [COUNTERFLOW]

PROPANE GAS TANKS AND PIPING

Sizing Between Single or Second Stage Regulator and Appliance*
Maximum Propane Capacities Listed are Based on 1/2" W.C. pressure drop at 11" W.C. setting.
Capacities in 1,000 BTU/hour.
Pipe or
Nominal Pipe Size
Tubing
Tubing Size, O.D. Type L
Schedule 40
Length,
3/8"
1/2"
5/8"
3/4"
7/8" 1-1/8" 1/2"
3/4"
1"
1-1/4" 1-1/2"
Feet
10
39
92
199
329
501
935
275
567
1,071 2,205 3,307
20
26
62
131
216
346
630
189
393
732
1,496 2,299
30
21
50
107
181
277
500
152
315
590
1,212 1,858
40
19
41
90
145
233
427
129
267
504
1,039 1,559
50
18
37
79
131
198
376
114
237
448
913
1,417
60
16
35
72
121
187
340
103
217
409
834
1,275
80
13
29
62
104
155
289
89
185
346
724
1,066
100
11
26
55
90
138
255
78
162
307
630
976
125
10
24
48
81
122
224
69
146
275
567
866
150
9
21
43
72
109
202
63
132
252
511
787
200
8
19
39
66
100
187
54
112
209
439
665
250
8
17
36
60
93
172
48
100
185
390
590

WARNING
IF

THE GAS FURNACE IS INSTALLED IN A BASEMENT, AN EXCAVATED
AREA OR A 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 AS CAN
SETTLE IN ANY LOW AREAS OR CONFINED SPACES.
• PROPANE GAS ODORANT MAY FADE, MAKING THE GAS
UNDETECTABLE EXCEPT FOR WITH A WARNING DEVICE.

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 on Page
4 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 11 inch
w.c. 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.
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.
Shellac-based compounds resistant to the actions of liquefied
petroleum gases such as Gasolac®, Stalactic®, Clyde’s® or John
Crane® are satisfactory.
Refer to the following illustration for typical propane gas installations.
5 to 15 PSIG
(20 PSIG Max.)

First Stage
Regulator

200 PSIG
Maximum

Continuous
11" W.C.

Second Stage
Regulator

Propane Gas Installation (Typ.)
Sizing Between First and Second Stage Regulator*
Maximum Propane Capacities listed are based on 2 psig pressure drop at 10 psig setting.
Capacities in 1,000 BTU/hour.
Pipe or
Nominal Pipe Size
Tubing
Tubing Size, O.D. Type L
Schedule 40
Length,
3/8"
1/2"
5/8"
3/4"
7/8"
1/2"
3/4"
Feet
10
730
1,700
3,200
5,300
8,300
3,200
7,500
20
500
1,100
2,200
3,700
5,800
2,200
4,200
30
400
920
2,000
2,900
4,700
1,800
4,000
40
370
850
1,700
2,700
4,100
1,600
3,700
50
330
770
1,500
2,400
3,700
1,500
3,400
60
300
700
1,300
2,200
3,300
1,300
3,100
80
260
610
1,200
1,900
2,900
1,200
2,600
100
220
540
1,000
1,700
2,600
1,000
2,300
125
200
490
900
1,400
2,300
900
2,100
150
190
430
830
1,300
2,100
830
1,900
175
170
400
780
1,200
1,900
770
1,700
200
160
380
730
1,100
1,800
720
1,500
To convert to capacities at 15 psig settings - multiply by 1.130
To convert to capacities at 5 psig settings - multiply by 0.879

*Data in accordance with NFPA pamphlet NO. 54

Propane Gas Piping Chart II
XIII. CIRCULATING AIR & FILTERS

DUCTWORK - AIR FLOW
WARNING
NEVER ALLOW THE PRODUCTS OF COMBUSTION, INCLUDING CARBON
MONOXIDE, TO ENTER THE RETURN DUCT WORK OR CIRCULATION
AIR SUPPLY.

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.
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. 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 us a room, closet, or alcove as a return air
chamber.
When the furnace is used in connection with a cooling unit, the furnace should be installed in parallel with or on the upstream side of the
cooling unit to avoid condensation in the heating 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.
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.

Propane Gas Piping Chart I
31

CHECKING DUCT STATIC

BOTTOM RETURN AIR OPENING [UPFLOW MODELS]

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;

The bottom return air opening on upflow models utilizes a “lance and
cut” method to remove sheet metal from the duct opening in the base
pan. To remove, simply press out the lanced sections by hand to expose the metal strips retaining the sheet metal over the duct opening.
Using tin snips, cut the metal strips and remove the sheet metal to
free the duct flanges. Using the scribe line along the duct flange as a
guide, unfold the duct flanges around the perimeter of the opening
using a pair of 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.

WARNING
EDGES OF SHEET

METAL HOLES MAY BE SHARP.
PRECAUTION WHEN REMOVING HOLE PLUGS.

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.
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.

CUT USING TIN SNIPS
PRESS OUT BY HAND

CUT FOUR CORNERS
AFTER REMOVING SHEET
METAL

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.

USE GLOVES AS A

SCRIBE LINES OUTLINING
DUCT FLANGES

Duct Flange Cut Outs
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. 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 air stream. 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 DUCTWORK
Filters must be used with this furnace. Discuss filter maintenance
with the building owner. Filters do not ship with this furnace, but
must be provided by the installer. Filters must comply with UL900
or CAN/ULCS111 standards. If the furnace is installed without filters, the warranty will be voided.
Checking Static Pressure
(80% Furnace Shown, 90% Similar)

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 Minimum Filter Area tables to determine filter area requirements.
32

1600

2000

040_3BXA
0453BXA

194*

240

288

---

060_3BXA
0703BXA

---

324*

336

---

0704CXA

---

291*

336

384

---

0904CXA

---

432*

---

080_5CXA
0905DXA

---

388*

480

100_5DXA
1155DXA

---

486*

FILTER
ACCESS
DOOR

FILTER

1400

1200

FI
LT

1000

800

600

Input__Airflow

COOLING AIRFLOW REQUIREMENT (CFM)

RETURN
DUCT

CENTRAL
RETURN
GRILLE

FILTER
SUPPORT
BRACKET
(PROVIDED)

*Minimum filter area dictated by heating airflow requirement.
Permanent Minimum Filter Area (sq. in)
[Based on a 600 ft/min filter face velocity]

Input__Airflow

COOLING AIRFLOW REQUIREMENT (CFM)
600

800

1000

1200

1400

1600

2000

040_3BXA
0453BXA

388*

480

576

---

060_3BXA
0703BXA

---

647*

672

---

0704CXA
0904CXA
080_5CXA
0905DXA
100_5DXA
1155DXA

583*

672

768

AIR FLOW

Possible Upright Counterflow

Filter Locations

---

863*

---

777*

960

NOTE: Internal filter retention is not provided on this furnace.

---

971*

HORIZONTAL INSTALLATIONS
Filters must be installed in either the central return register or in the
return air duct work.

*Minimum filter area dictated by heating airflow requirement.
Disposable Minimum Filter area (sq. in)
[Based on 300 ft/min filter face velocity]

XIV. STARTUP PROCEDURE & ADJUSTMENT

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 figure shows possible filter locations.
AIR FLOW

HEAT ANTICIPATOR SETTING
The heat anticipator in the room thermostat must be correctly adjusted to obtain the proper number of cycles per hour and to prevent “overshooting” of the setting. Set the heat anticipator setting to
0.7 amps. Follow the thermostat manufacturer’s instructions on
how to adjust the heat anticipator setting.

DRAIN TRAP PRIMING

SIDE RETURN
EXTERNAL FILTER
RACK KIT
(EITHER SIDE)

FILTER

CENTRAL
RETURN
GRILLE

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 Section XVI, Operational Checks.

The drain trap must be primed prior to furnace startup. To prime, fill
the drain trap with water. This ensures proper furnace drainage
upon startup and prohibits the possibility of flue gases escaping
through the drain system. Air conditioning condensate may be drained
into the furnace trap.

FURNACE OPERATION
Purge gas lines of air prior to startup. Be sure not to purge lines into
an enclosed burner compartment. Follow NFPA 54, National Fuel Gas
Code 8.3 for proper purging methods. In Canada, follow approved
purging methods in B149.1

Possible Upright Upflow

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.
33

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.

Manometer
Hose

Open to
Atmosphere

Outlet
Pressure Boss

5. Move the furnace gas valve manual control to the OFF
position.
6. Wait five minutes then smell for gas. Be sure to check near
the floor as some types of gas are heavier than air.
7. If you smell gas after five minutes, immediately follow the
instructions on page 4 of this manual. If you do not smell
gas after five minutes, move the furnace gas valve manual
control to the ON position.
8. Replace the burner compartment door.
9. Open the manual gas shutoff valve external to the furnace.
10. Turn on the electrical power to the furnace.
11. Adjust the thermostat to a setting above room temperature.
12. After the burners are lit, set the thermostat to desired
temperature.

Inlet
Pressure
Tap
Manometer

High Fire Regulator
Adjust
Regulator
Vent

Low Fire
Regulator
Adjust

High Fire Coil
Coaxial Coil
Terminal (HI)
Terminal (M)
Common
On/Off Switch
Terminal(C)

FURNACE SHUTDOWN

White-Rodgers Model 36G54 Connected to Manometer

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.
After a 100 or 150 second delay period (field selectable), the
circulator blower will be de-energized.
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.

Regulator
Vent

GAS SUPPLY PRESSURE MEASUREMENT

Gas Valve On/Off
Selector Switch

CAUTION
TO PREVENT UNRELIABLE OPERATION OR EQUIPMENT DAMAGE, THE
INLET GAS SUPPLY PRESSURE MUST BE AS SPECIFIED ON THE UNIT

Open to
Atmosphere

RATING PLATE WITH ALL OTHER HOUSEHOLD GAS FIRED APPLIANCES
OPERATING.

The line pressure supplied to the gas valve must be within the
range specified in the Inlet Gas Supply Pressure table. 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.

Manometer
Hose

High Fire
Regulator
Adjust

Low Fire
Regulator
Adjust
Common
Terminal(C)
High Fire Coil
Terminal (HI)
Low Fire Coil
Terminal (LO)

i
Inlet Pressure Tap
1/8 NPT

Manometer

INLET

OUTLET

Outlet Pressure Tap
1/8 NPT

Honeywell Model VR9205 Connected to Manometer

Gas Valve On/Off
Selector Switch

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 Honeywell VR9205 gas valve
figure or White-Rodgers 36G54 gas valve figure for location
of inlet pressure tap.

White-Rodgers Model 36G54 (Two-Stage)

b. White-Rodgers 36G54 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 barb fitting
(Honeywell valve) or outlet pressure tap (White-Rodgers valve).
5. Turn ON the gas supply.
3. Turn ON the gas supply and operate the furnace and all other
6. Turn on power and close thermostat “R” and “W1” contacts to
gas consuming appliances on the same gas supply line.
provide a call for low stage heat.
4. Measure furnace gas supply pressure with burners firing.
7.
Measure the gas manifold pressure with burners firing. Adjust
Supply pressure must be within the range specified in the
manifold
pressure using the Manifold Gas Pressure table
Inlet Gas Supply Pressure table.
shown below.
Inlet Gas Supply Pressure
8. Remove regulator cover screw from the low (LO) outlet
Natural Gas
Minimum: 4.5" w.c.
Maximum: 10.0" w.c.
pressure regulator adjust tower and turn screw clockwise
to increase pressure or counterclockwise to decrease
Propane Gas Minimum: 11.0" w.c.
Maximum: 13.0" w.c.
pressure. Replace regulator cover screw.
If supply pressure differs from table, make the necessary adjust9.
Close
thermostat “R” and “W2” contacts to provide a call for
ments to pressure regulator, gas piping size, etc., and/or consult
high
stage
heat.
with local gas utility.
10. Remove regulator cover screw from the high (HI) outlet
5. Turn OFF gas to furnace at the manual shutoff valve and
pressure regulator adjust tower and turn screw clockwise
disconnect manometer. Reinstall plug before turning on
to increase pressure or counterclockwise to decrease
gas to furnace.
pressure. Replace regulator cover screw.
6. Turn OFF any unnecessary gas appliances stated in step
11.
Turn
off all electrical power and gas supply to the system.
3.
12. Remove the manometer hose from the hose barb fitting or
outlet pressure tap.
Gas Line
13. Replace outlet pressure tap:
Gas
Shutoff
a. Honeywell VR9205 valve: Remove the 1/8" NPT hose barb
Valve
fitting from the outlet pressure tap. Replace the outlet
pressure tap plug and seal with a high quality thread
sealer.
Gas Line
b. White-Rodgers 36G54 valve: Turn outlet pressure test
To Furnace
screw in to seal pressure port (clockwise, 7 in-lb
minimum).
14.
Turn
on electrical power and gas supply to the system.
Open To
Atmosphere
15. Close thermostat contacts “R” and “W1/W2” to energize the
Drip Leg Cap
valve.
With Fitting
Using a leak detection solution or soap suds, check for leaks at
outlet pressure boss plug (Honeywell valve) or screw (White-RodgManometer Hose
ers 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.
NOTE: If measuring gas pressure at the drip leg or Honeywell VR9205
gas valve, 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 36G54 gas valve, then use the 36G Valve Pressure
Check Kit, Goodman Part No. 0151K00000S.

Manometer

Measuring Inlet Gas Pressure (Alt. Method)

Manifold Gas Pressure

GAS MANIFOLD PRESSURE MEASUREMENT AND ADJUSTMENT

Gas

Rate
Low Stage
Natural
High Stage
Low Stage
Propane
High Stage

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 .
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:
a. Honeywell VR9205 valve: Remove the outlet pressure
tap plug. Install an 1/8" NPT hose barb fitting into the outlet
pressure tap.

Range
Nominal
1.7 to 2.3" w.c. 2.0" w.c.
3.2 to 3.8" w.c. 3.5" w.c.
5.7 to 6.3" w.c. 6.0" w.c.
9.7 to 10.3" w.c. 10.0" w.c.

GAS INPUT RATE MEASUREMENT (NATURAL GAS ONLY)
The 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, time and record one complete
revolution of the smallest gas meter dial.

3. Calculate the number of seconds per cubic foot (sec/ ft3) of
gas being delivered to the furnace. If the dial is a one cubic
foot dial, divide the number of seconds recorded in step 2
by one. If the dial is a two cubic foot dial, divide the number
of seconds recorded in step 2 by two.

blower speed to increase temperature rise. Refer to Startup
Procedure and Adjustment -Circulator Blower Speeds for speed
changing details.

CIRCULATOR BLOWER SPEEDS

4. Calculate the furnace input in BTUs per hour (BTU/ hr). Input
equals the installation’s gas heating value multiplied by a
conversion factor (hours to seconds), divided by the number
of seconds per cubic foot. The measured input must not be
greater than the input indicated on the unit rating plate.
EXAMPLE:
Installation’s gas heating (HTG) value: 1,000 BTU/ft 3
(Obtained from gas supplier)
Installation’s seconds per cubic foot: 34 sec/ ft3
Conversion Factor (hours to seconds): 3600 sec/hr

WARNING
TO PREVENT PREMATURE FAILURE OF HEAT EXCHANGER, PROPERTY
DAMAGE, PERSONAL INJURY OR DEATH, DO NOT ADJUST THE LIMIT
CONTROL (FACTORY-SET ).

Input = (Htg. value x 3600) ÷ seconds per cubic foot
Input = (1,000 BTU/ft3 x 3600 sec/hr) ÷ 34 sec/ ft3
Input = 106,000 BTU/hr
This measured input must not be greater than the input
indicated on the unit rating plate.
5. Turn ON gas and relight appliances turned off in step 1.
Ensure all the 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.

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.
The cooling blower speed is shipped set on HIGH, and the heating
blower speed is set as indicated in the Specification Sheet applicable to your model. These blower speeds should be adjusted by
the installer to match the installation requirements so as to provide
the correct heating temperature rise and correct cooling CFM.
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 LO HEAT-H, HI HEAT-H and
COOL-H (hot)). If a heating speed and the cooling blower
speed 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 Section XIV,
Startup Procedure and Adjustment - Temperature Rise.
*MH95, ACSH96, GCH95, GCH9
Circulator Blower Speeds
LOW
MEDIUM LOW
MEDIUM LOW
HIGH
COMMON/NEUTRAL

SUPPLY
AIR

RED
ORANGE
BLUE
BLACK
WHITE

AMEH96, GME95
Circulator Blower Speeds
T1-LOW
T2-MED-LOW
T3-MED
T4-MED-HI
T5-HI
COMMON\NEUTRAL

RETURN
AIR

Temperature Rise Measurement
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
36

YELLOW
RED
ORANGE
BLUE
BLACK
WHITE

100
SECOND
DELAY

150
SECOND
DELAY

5
MINUTES

SECOND
STAGE
ONLY

1-STAGE

2-STAGE

OFF

As shipped, the circulator blower fan will remain on for 150 seconds
after the gas valve closes. When a call for cooling occurs, the circulator fan comes on and remains on for 45 seconds after the call for
cooling ends. During normal heating operation, the circulator fan will
come on approximately 34 seconds after the gas valve opens.

MODE

OFF

HEAT OFF
DELAY

OFF

NOTE: Items in this section refer to the air circulator blower fan
NOT to the induced draft blower. The induced draft blower timing
sequence is not adjustable. The circulator blower fan timing is
adjustable only on models with optional “heating fan OFF delay”
adjustment pins or switches. It is NOT adjustable in any other
circumstances.

CIRCULATOR BLOWER FAN TIMING ADJUSTMENT

AUTO

XV. NORMAL SEQUENCE OF OPERATION
SECOND
DELAY

SECOND
DELAY

POWER UP
The normal power up sequence is as follows:
• 115 VAC power applied to furnace.

Switch viewed in an upflow installation.

Adjustment Switch

SETTING FURNACE OPERATING MODE
This furnace is designed to operate with either a single gas input rate
or with two distinct gas input rates. The Mode DIP switch is used to
select the single gas input rate or two distinct input rates.
Setting the Mode switch to “1 STG” forces the furnace to operate at
the furnace’s highest input rate only. Operation is as described
under Sequence of Operation (Integrated Ignition Control) – Mode
DIP Switch is set to “1 STG” position.
Setting the Mode switch to “2 STG” allows the furnace to operate at
the furnace’s highest input AND at an input rate that is 75% of the
highest input rate. For this mode of operation, the furnace operates at the low input rate for a pre-determined time period then
steps to the high input rate. Operation is as described under Sequence of Operation (Integrated Ignition Control) – Mode DIP Switch
is set to “2 STG” position.

•
•
•

Integrated control module performs internal checks.

•

Furnace awaits call from thermostat.

Integrated control module LED will light.
Integrated control module monitors safety circuits
continuously.

HEATING MODE
(MODE DIP SWITCH IS SET TO “1 STG” POSITION)
The normal operational sequence in heating mode is as follows:
• R and W thermostat contacts close, initiating a call for heat.

The time period is determined by the 2nd Stg Dly DIP switch. Setting
the 2nd Stg Dly DIP switch to 5 minutes fixes the delay period at 5
minutes. Setting the 2nd Stg Dly DIP switch to Auto enables an
algorithm that calculates a delay period based on the heating cycle
time and the total cycle time. The delay period can range from 1
minute to 12 minutes.
NOTE: The ACSH, AMH, AMEH, GCH, GDH, GMH and GME hybrid
furnaces require a single stage thermostat. These furnaces utilize a
control board with single stage or two stage capability. The second
stage feature is established by setting dip switch #2 on the board,
either one stage or two stage. All of the second stage timing is then
controlled by dipswitch 3 on the circuit board.

•
•

Integrated control module performs safety circuit checks.

•
•

Igniter warm up begins after 15 second prepurge expires.

•

Integrated control module monitors flame presence. Gas
valve will remain open only if flame is detected.

•

Circulator blower is energized on high heat speed following
a fixed thirty second blower on delay. Electronic air cleaner
terminals are energized with circulator blower.

•

Furnace operates; 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 energized for 15 second pre-purge
period causing pressure switch contacts to close.
Low and high stage gas valves open at end of igniter warm
up period, delivering gas to burners and establishing flame.

Induced draft blower is de-energized following a fifteen
second post purge.
The circulator blower remains at high heat speed for thirty
seconds. The circulator blower then switches to low heat
speed for the remainder of the selected heat off delay period.
For example, the selected heat off delay period is 150 seconds.
The circulator blower operates at high heat for 30 seconds
and at low speed for 150 - 30 = 120 seconds.

(MODE DIP SWITCH IS SET TO “2 STG” POSITION)

•
•
•

R and Y thermostat contact open, completing the call for cool.

Induced draft blower is energized for 15 second prepurge
period causing pressure switch contacts to close.

•

Furnace awaits the next call from thermostat.

•
•

Igniter warm up begins after 15 second prepurge expires.

FAN ONLY MODE

Low and high-stage gas valves open at end of igniter warm
up period, delivering gas to burners and establishing flame.

•

The normal operational sequence in fan only mode is as follows:
• R and G thermostat contacts close, initiating a call for fan.

High-stage gas valve closes after five seconds; low-stage
gas valve remains open.

Integrated control module performs safety circuit checks.

•

Integrated control module monitors flame presence. Gas valve
will remain open only if flame is detected.

•
•

•

Circulator blower is energized on low heat speed following a
fixed thirty second blower on delay. Electronic air cleaner
terminals are energized with circulator blower.

•

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. Electronic air cleaner
terminals are de-energized.

•

Furnace awaits the next call from thermostat.

The normal operational sequence in sequence is as follows:
• R and W thermostat contacts close, initiating a call for heat.

•
•

Integrated control module performs safety circuit checks.

•
•

Furnace is now operating in low-stage heating mode.

•

If low-stage delay period expires, control will shift operation
from low-stage heating mode operation to high-stage
heating mode operation. Control will energize circulator
blower high heat speed and high stage gas valve.

Furnace operates; integrated control module monitors
safety circuits continuously.

•
•

Furnace is now operating in high-stage heating mode.

•

Induced draft blower is de-energized following a fifteen
second post purge.

•

Circulator blower is de-energized following a heat off delay
period (selectable 100 or 150 seconds; factory set at 150
seconds).
If the furnace is operating in the low-stage heating mode
when thermostat contacts open, circulator remains at low
heat speed for the selected delay off period.
If the furnace is operating in high-stage heating mode when
the thermostat contacts open, the circulator blower remains
at high heat speed for thirty seconds. The circulator blower
then switches to low heat speed for the remainder of the
selected heat off delay period. For example, the selected
heat off delay period is 150 seconds. The circulator blower
operates at high heat for 30 seconds and at low speed for
150 - 30 = 120 seconds.

•

R and W thermostat contacts open, completing the call for
heat.

Outdoor fan and compressor are de-energized.
Circulator blower is de-energized following a fixed forty five
second cool off delay period. Electronic air cleaner terminals
are de-energized.

Circulator blower is energized on low heat speed. Electronic
air cleaner terminals are energized.

XVI. OPERATIONAL CHECKS

BURNER FLAME
The burner flames should be inspected with the burner compartment door installed. A sight glass is provided for inspection purposes. 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.

Check the
Burner Flames for:
1. Stable, soft and blue.
2. Not curling, floating
or lifting off.

Burner Flame
XVII. SAFETY CIRCUIT DESCRIPTION

Furnace awaits the next call from thermostat.

COOLING MODE

GENERAL

The normal operational sequence in cooling mode is as follows:
• R and Y thermostat contacts close, initiating a call for cool.

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 performs safety circuit checks.
Outdoor fan and compressor are energized.
Circulator blower is energized on cool speed following a fixed
five second on delay. Electronic air cleaner terminals are
energized with circulator blower.
Furnace circulator blower and outdoor cooling unit run,
integrated control module monitors safety circuits
continuously.

INTEGRATED CONTROL MODULE
The integrated control module is an electronic device which, if a potential safety concern is detected, the module will take the necessary
precautions and provide diagnostic information through an LED.

PRIMARY LIMIT

DIAGNOSTIC CHART

The primary limit control is located on the partition panel and monitors
heat exchanger compartment temperatures. It is a normally-closed
(electrically), automatic reset, temperature-activated sensor. The limit
guards against the overheating as a result of insufficient conditioned
air passing over the heat exchanger.

WARNING
HIGH VOLTAGE!
TO AVOID PERSONAL INJURY OR DEATH DUE TO
ELECTRICAL SHOCK, DISCONNECT ELECTRICAL POWER
BEFORE PERFORMAING ANY SERVICE OR MAINTENANCE.

AUXILIARY LIMIT
The auxiliary limit control(s) are located on or near the circulator blower
and monitors heat exchanger compartment temperatures. They are
a normally-closed (electrically), manual-reset, temperature activated
sensors. These limits guard against overheating as a result of insufficient conditioned air passing over the heat exchanger.

ROLLOUT LIMIT

Refer to the Troubleshooting Chart at the end of this manual for assistance in determining the source of unit operational problems. The red
diagnostic LED blinks to assist in troubleshooting the unit. The number of blinks refers to a specific fault code.

FAULT RECALL

The rollout limit control(s) are mounted on the burner/manifold assembly
The ignition control is equipped with a momentary pushbutton switch
and monitor the burner flame. They are normally-closed (electrically),
that can be used to display on the diagnostic LED the last five faults
manual-reset, temperature-activated sensors. These limits guard
detected by the control. The control must be in Standby Mode (no theragainst burner flames not being properly drawn into the heat exchanger.
mostat inputs) to use the feature. Depress the pushbutton switch for
approximately 2 seconds. Release the switch when the LED is turned
PRESSURE SWITCHES
off. The diagnostic LED will then display the flash codes associated
The pressure switches are normally-open (closed during operation),
with the last five detected faults. The order of display is the most resingle-pole single-throw, negative air pressure-activated switches.
cent fault to the least recent fault.
They monitor the airflow (combustion air and flue products) through
the heat exchanger via pressure taps located on the induced draft RESETTING FROM LOCKOUT
blower and the coil front cover. These switches guard against insuffiFurnace lockout results when a furnace is unable to achieve ignition
cient airflow (combustion air and flue products) through the heat exafter three attempts during a single call for heat. It is characterized by
changer and/or blocked condensate drain conditions.
a non-functioning furnace and a one flash diagnostic LED code. If the
furnace is in “lockout”, it will (or can be) reset in any of the following
FLAME SENSOR
ways.
The flame sensor is a probe mounted to the burner/manifold assem1. Automatic reset. The integrated control module will
bly which uses the principle of flame rectification to determine the presautomatically reset itself and attempt to resume normal
ence or absence of flame.
operations following a one hour lockout period.
2. Manual power interruption. Interrupt 115 volt power to the
XVIII. TROUBLESHOOTING
furnace for 1 - 20 seconds.
ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS
3. Manual thermostat cycle. Lower the thermostat so that
there is no longer a call for heat then reset to previous setting.
NOTE: Discharge body’s static electricity before touching unit. An
Interrupt thermostat signal to the furnace for 1 - 20 seconds.
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 furnaces
near the control. Any tools held in a person’s hand during
grounding will be discharged.
3. Service integrated control module or connecting wiring following
the discharge process in step 2. Use caution not to recharge
your body with static electricity; (i.e., do not move or shuffle
your feet, do not touch ungrounded objects, etc.). If you come
in contact with an ungrounded object, repeat step 2 before
touching control or wires.
4. Discharge your body to ground before removing a new control
from its container. Follow steps 1 through 3 if installing the
control on a furnace. Return any old or new controls to their
containers before touching any ungrounded object.

NOTE: If the condition which originally caused the lockout still
exists, the control will return to lockout. Refer to Troubleshooting Diagnostic Chart for aid in determining the cause.

XIX. MAINTENANCE

HORIZONTAL UNIT FILTER REMOVAL
Filters in horizontal installations are located in the central return register or the ductwork near the furnace.

WARNING

To remove:
1.
2.
3.
4.

HIGH VOLTAGE!
TO AVOID PERSONAL INJURY OR DEATH DUE TO
ELECTRICAL SHOCK, DISCONNECT ELECTRICAL POWER
BEFORE PERFORMING ANY MAINTENANCE. IF YOU MUST
HANDLE THE IGNITER, HANDLE WITH CARE. TOUCHING
THE IGNITER ELEMENT WITH BARE FINGERS, ROUGH

Turn OFF electrical power to furnace.
Remove filter(s) from the central return register or ductwork.
Replace filter(s) by reversing the procedure for removal.
Turn ON electrical power to furnace.

MEDIA AIR FILTER OR ELECTRONIC AIR CLEANER REMOVAL
Follow the manufacturer’s directions for service.

HANDLING OR VIBRATION COULD DAMAGE THE IGNITER
RESULTING IN PREMATURE FAILURE. ONLY A QUALIFIED
SERVICER SHOULD EVER HANDLE THE IGNITER.

BURNERS

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.
• Flue pipe system. Check for blockage and/or leakage. Check
the outside termination and the connections at and internal
to the furnace.

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

•

Heat exchanger. Check for corrosion and/or buildup within
the heat exchanger passageways.

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.

•

Burners. Check for proper ignition, burner flame, and flame
sense.

CONDENSATE TRAP AND DRAIN SYSTEM (QUALIFIED SERVICER
ONLY)

•

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.

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.

•

Filters.

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 1 to 6 microamps at 115
volts.

FILTERS
CAUTION
TO ENSURE PROPER UNIT PERFORMANCE, ADHERE TO THE FILTER
SIZES GIVEN IN THE RECOMMENDED MINIMUM FILTER SIZE TABLE OR
SPECIFICATION SHEET APPLICABLE TO YOUR MODEL*

*NOTE: Please contact your distributor or our website for the
applicable Specification Sheet referred to in this manual.

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.

FILTER REMOVAL

IGNITER (QUALIFIED SERVICER ONLY)
If the igniter and the surrounding air are at about 70°F and the
igniter wires are not connected to any other electrical components,
the resistance of the igniter should not exceed 75 ohms. If it does,
the igniter should be replaced.

FLUE PASSAGES (QUALIFIED SERVICER ONLY)
The heat exchanger flue passageways should be inspected at the
beginning of each heating season. If necessary, clean the passageways as outlined below.

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.

1. Turn OFF the electrical power and gas supply to the furnace.
2. Disconnect the gas line and remove the burner/ manifold
assembly by removing the screws securing the assembly
to the partition panel.
3. Disconnect the flue pipe system from the induced draft
blower.
4. Remove the induced draft blower and, drain and pressure
tap hoses from the recuperator coil front cover.
5. Remove the recuperator coil front cover to expose the coil tubes
and turbulators.

6. Remove the recuperator coil turbulators individually by slowly
pulling each turbulator forward firmly.
7. Clean the recuperator coil tubes using a long handle wire brush,
such as a gun cleaning brush.
8. Clean the primary heat exchanger tubes using a wire brush
attached to a length of high grade stainless steel cable, such
as drain cleanout cable. Attach a variable speed reversible
drill to the other end of the cable. Slowly rotate the cable with
the drill and insert it into one of the heat exchanger tubes.
While reversing the drill, work the cable in and out several times
to obtain sufficient cleaning. Repeat for each tube.
9. Clean residue from furnace using a vacuum cleaner.
10. Replace the parts removed in the previous steps in reverse
order.
11. Turn on electrical power and gas to furnace. Check for leaks
and proper unit operation.
12. Severe heat exchanger fouling is an indication of an operational
problem. Perform the checks listed in Section XIV, Startup
Procedure and Adjustments to reduce the chances of repeated
fouling.
XX. 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.
XXI. REPAIR & 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
Gas Manifold
Natural Gas Orifice
Propane Gas Orifice
Igniter
Flame Sensor
Rollout Limit Switch
Primary Limit Switch
Auxiliary Limit Switch
Pressure Switch
Induced Draft Blower
Door Switch

Blower Motor
Blower Wheel
Blower Mounting Bracket
Blower Cutoff
Blower Housing
Capacitor
Heat Exchanger
Coil Front Cover
Integrated Control Module
Transformer

TROUBLESHOOTING CHART
Symptoms of Abnormal
Operation

Associated
Associated
LED
LED Code22

• Furnace fails to operate.
• Integrated control module
diagnostic LED provides
no signal.

NONE

• LED is Steady On.

Fault Description(s)

Possible Causes

• No 115 volt power to • Manual disconnect switch
furnace, or no 24 volt OFF, door switch open, or
power to integrated
24 volt wires improperly
control module.
connected or loose.
• Blown fuse or circuit • Blown fuse or circuit
breaker.
breaker.
• Integrated control
module has an
internal fault.

• Integrated control module
has an internal fault.

• 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.

Corrective Action

Cautions and Notes

• Assure 115 and 24 volt • Turn power OFF
power to furnace
prior to repair.
integrated control module. • Replace integrated
• Check integrated control control module
fuse with 3A
module fuse (3A).
automotive fuse.
Replace if necessary.
• Check for possible shorts • Read precautions
in 115 and 24 volt circuits. in “Electrostatic
Discharge” section
Repair as necessary.
of manual.
• Replace bad integrated
control module.
• None

•Normal Operation

CONTINUOUS
ON

• Furnace fails to operate.
• Integrated control module
diagnostic LED is
flashing ONE (1) flash.

1
1 FLASH

• 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.

• Induced draft blower
pressure switch contacts
sticking.
• Shorts in pressure switch
circuit.

• Replace induced draft • Turn power OFF
blower pressure switch. prior to repair.
• Replace pressure
switch with proper
• Repair short.
replacement part.

• Furnace fails to operate.
• Integrated control module
diagnostic LED is
flashing TWO (2) flashes.

• Pressure switch
circuit is closed.
• Induced draft
blower is not
2 FLASHES
operating.

• Induced draft blower runs
continuously with no
further furnace operation.
• Integrated control module
diagnostic LED is
flashing THREE (3)
flashes.

• Pressure switch
• Pressure switch hose
circuit not closed.
blocked, pinched or
• Induced draft blower connected improperly.
is operating.
• Blocked flue and/or inlet air
3 FLASHES
pipe, blocked drain system,
or weak induced draft
blower.
• Incorrect pressure switch
setpoint or malfunctioning
switch contacts.
• Loose or improperly
connected wiring.

1
2

• Turn power
OFF prior to
repair.

• Locate and correct gas
interruption.
• Check front cover
pressure switch
operation (hose, wiring,
contact operation).
Correct if necessary.
• Replace or realign
igniter.
• Check flame sense
signal. Sand sensor if
coated and/or oxidized.
• Check flue piping for
blockage, proper
length, elbows, and
termination.
• Verify proper induced
draft blower performance.

• Inspect pressure
• Turn power
OFF prior to
switch hose. Repair, if
repair.
necessary,
• Inspect flue and/or inlet • Replace
air piping for blockage,
pressure
proper length, elbows,
switch with
and termination. Check proper
replacement
drain system. Correct
part.
as necessary.
• Correct pressure switch
setpoint or contact
motion.
• Tighten or correct
wiring connection.

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.

• Igniter is
fragile, handle
with care.
• Sand flame
sensor with
emery cloth.
• See “Vent/Flue
Pipe” section
for piping
details.

TROUBLESHOOTING CHART
Symptoms of
Abnormal Operation
• Circulator blower runs
continuously. No furnace
operation.
• Integrated control module
diagnostic LED is flashing
FOUR (4) flashes.

• Induced draft blower and
circulator blower runs
continuously. No furnace
operation.
• Integrated control module
diagnostic LED is flashing
FIVE (5) flashes.
• Furnace fails to operate.
• Integrated control module
diagnostic LED is flashing
SIX (6) flashes.
• No furnace operation.

• Normal furnace
operation.
• Integrated control module
diagnostic LED is
flashing SEVEN (7)
flashes.

• Furnace not operating.
• Integrated control module
diagnostic LED is
flashing EIGHT (8)
flashes.

Associated
LED Code2

Possible Causes

Corrective Action

Cautions
& Notes

• Primary limit
circuit is open.

• Insufficient conditioned air
over the heat exchanger.
Blocked filters, restrictive
ductwork, improper
circulator blower speed, or
failed circulator blower.
• Faulty primary limit switch.
• Loose or improperly
connected wiring.

• Check primary 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.
• Tighten or correct wiring
connection.

• Flame sensed
with no call for
heat.

• Short to ground in flame
sense circuit.

• Correct short at flame
sensor or in flame
sensor wiring.

• Rollout limit open.
• Integrated control
module fuse is
blown.

• Flame rollout.
• Misaligned burners,
blocked flue and/or air
inlet pipe, or failed
induced draft blower.
• Loose or improperly
connected wiring.
• Short in 24 volt AC
control circuits or safety
circuits.
•Faulty rollout limit.

• Check burners for proper
alignment.
• Check flue and air inlet
piping for blockage,
proper length, elbows,
and termination. Correct
as necessary.
• Check rollout limit. Replace
if necessary.
• Check induced draft
blower for proper
performance. Replace, if
necessary.
• Tighten or correct wiring
connection.
• Repair short in 24 volt AC
control/safety circuit(s).
• Replace integrated control
module fuse (3A).

• See “Vent/Flue
Pipe” section for
piping details.
• Replace induced
draft blower with
proper replacement part.
• Replace integrated control
module fuse with
3A automotive
fuse.
• Read precautions
in “Electrostatic
Discharge”
section of manual.
• Replace rollout
limit with correct
replacement part.

• Flame sense
microamp signal is
low.

• Flame sensor is coated/
oxidized.
• Flame sensor incorrectly
positioned in burner
flame.
• Lazy burner flame due to
improper gas pressure or
combustion air.

• Sand flame sensor.
• Inspect for proper sensor
alignment.
• Compare current gas
pressure to rating plate
info. Adjust as needed.

• Turn power OFF
prior to repair.
• Clean flame sensor
with steel wool.
• See “Vent/Flue
Pipe” section for
piping details.
• See rating plate for
proper gas
pressure.

4 FLASHES

• Turn power OFF
prior to repair.
• Replace primary
switch with proper
replacement part.
• Replace blower
with correct
replacement part.

• Turn power OFF
prior to repair.

5 FLASHES

6
6 FLASHES

7
7 FLASHES

• Problem with
igniter circuit.

• Improperly connected
igniter.
• Bad igniter.
• Poor unit ground.
• Poor burner ground.
• Faulty integrated control
module.

• Check and correct wiring
from integrated control
module to igniter.
•Replace bad igniter.
•Check and correct unit
ground wiring.
• Replace bad integrated
control module.

• Turn power OFF
prior to repair.
• Replace igniter
with proper
replacement part.
• Read precautions
in “Electrostatic
Discharge”
section of manual.

• Polarity of 115
or 24 volt
power is
reversed.

• Polarity of 115 volt AC
power to furnace or
integrated control module
is reversed.
• Red and blue wires to
transformer are reversed.
• Poor unit ground.

• Review wiring diagram to
correct polarity.
• Verify proper ground.
Correct if necessary.
• Reverse red and blue
wires connected to
transformer.

• Turn power OFF
prior to repair.

8 FLASHES

• Induced draft blower runs
C
continuously. No furnace
operation.
• Integrated control module CONTINUOUS
diagnostic LED is flashing
FLASHING
continuously.
• LED is steady on

Fault
Description(s)

STEADY
ON

• Normal operation.

LED Flash code will cease if power to the control module is interrupted through the disconnect or door switch.

*MH95

BLOWER PERFORMANCE DATA

BLOWER PERFORMANCE
(CFM & Temperature Rise vs. External Static Pressure)

Heating Speed
As Shipped

EXTERNAL STATIC PRESSURE (Inches Water Column)

Tons AC

Model

Motor
Speed

at 0.5"
ESP

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

CFM RISE CFM RISE CFM RISE CFM RISE CFM RISE CFM CFM CFM

HIGH

3.0

1352

1318

1260

1202

1128

1044 955

853

*MH950453BX*

MED

2.5

1214

1172

1123

1064

1012

938

859

741

(MED-HI)

MED-LO

2.0

997

994

960

923

884

817

741

611

LOW

1.5

757

753

734

704

674

620

524

438

HIGH

3.0

1449

1409

1326

1273

1201

1194 1136 1018

*MH950703BX*

MED

2.5

1192

1172

1141

1094

1046

973

904

793

(MED-HI)

MED-LO

2.0

981

962

943

917

888

830

764

665

LOW

1.5

750

730

714

692

657

620

570

502

HIGH

4.0

2069

1965

1871

1756

1661

1549 1415 1275

*MH950704CX*

MED

3.5

1752

1724

1667

1603

1488

1402 1290 1082

(MED-HI)

MED-LO

3.0

1437

1417

1369

1320

1256 1140 984

LOW

2.5

1184

1177

1161

1132

1095

1047 928

HIGH

4.0

1970

1874

1757

1667

1566

1431 1334 1182

*MH950904CX*

MED

3.5

1713

1650

1572

1510

1418

1313 1211 1079

(MED-HI)

MED-LO

3.0

1439

1412

1370

1327

1260

1166 1078 956

LOW

2.5

1183

1155

1122

1108

1062

1011 931

HIGH

5.0

2058

1997

1928

1852

1777

1682 1600 1487

*MH950905CX*

MED

4.0

1718

1685

1632

1586

1520

1458 1369 1281

(MED-HI)

MED-LO

3.5

1502

1464

1429

1380

1319

1272 1200 1137

LOW

3.0

1305

1277

1253

1212

1175

1127 1081 1010

HIGH

5.0

2147

2114

2057

2030

1978

1889 1784 1713

*MH950905DX*

MED

4.0

1675

1686

1640

1623

1557

1501 1455 1360

(MED-HI)

MED-LO

3.5

1489

1470

1436

1409

1361

1318 1243 1130

LOW

3.0

1307

1265

1234

1203

1168

1096 1053 991

HIGH

5.0

2134

2103

2029

1941

1906

1818 1733 1625

*MH951155DX*

MED

4.0

1678

1643

1577

1527

1489 1423 1339

(MED-HI)

MED-LO

3.5

1453

1440

1426

1363

1349

1314 1253 1205

LOW

3.0

1259

1239

1220

1181

1159

1118 1082 1015

837

816

CFM in chart is without filters(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.

All furnaces ship as high speed cooling and medium-speed heating. Installer must adjust blower cooling & heating speed as needed.

For most jobs, about 400 CFM per ton when cooling is desirable.

INSTALLATION IS TO BE ADJUSTED TO OBTAIN TEMPERATURE RISE WITHIN THE RANGE SPECIFIED ON THE RATING PLATE.

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.

At higher altitudes, a properly de-rated unit will have approximately the same temperature rise at a particular CFM, while the ESP at that CFM will be lower.

BLOWER PERFORMANCE DATA

ACSH96
BLOWER PERFORMANCE
(CFM & Temperature Rise vs. External Static Pressure)

Heating Speed
As Shipped

EXTERNAL STATIC PRESSURE (Inches Water Column)

Tons AC

Model

Motor
Speed

at 0.5"
ESP

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

CFM RISE CFM RISE CFM RISE CFM RISE CFM RISE CFM CFM CFM

HIGH

3.0

1415

1352

1290

1196

1127

1035 936

825

ACSH960453BX*

ME D

2.5

1221

1178

1127

1073

1007

932

834

733

(MED-HI)

MED-LO

2.0

1034

1000

976

935

881

818

733

662

LOW

1.5

860

845

812

783

740

682

619

534

HIGH

3.0

1431

1368

1296

1228

1150

1055 962

860

ACSH960703BX*

MED

2.5

1212

1182

1138

1091

1019

944

871

769

(MED-HI)

MED-LO

2.0

1002

978

956

921

878

825

738

647

LOW

1.5

813

805

790

759

726

689

644

605

HIGH

4.0

1755

1674

1632

1510

1423

1325 1241 1116

ACSH96 0704CX*

MED

3.5

1656

1585

1536

1429

1355

1268 1145 1059

(MED-HI)

MED-LO

3.0

1551

1488

1427

1353

1290

1195 1100 1017

LOW

2.5

1286

1258

1241

1185

1112

1067 983

HIGH

4.0

1734

1652

1578

1508

1413

1336 1248 1154

ACSH96 0904CX*

ME D

3.5

1642

1558

1487

1418

1336

1243 1164 1039

(MED-HI)

MED-LO

3.0

1522

1458

1396

1321

1253

1182 1101 986

LOW

2.5

1287

1244

1184

1148

1098

1034 953

HIGH

5.0

2189

2109

2025

1948

1862

1757 1644 1537

ACSH96 0905DX*

ME D

4.0

1885

1831

1776

1711

1637

1539 1453 1346

(MED-HI)

MED-LO

3.5

1665

1627

1584

1524

1462

1400 1323 1220

LOW

3.0

1474

1440

1401

1356

1310

1255 1193 1109

HIGH

5.0

2134

2103

2029

1941

1906

1818 1733 1625

ACSH96 1155DX*

ME D

4.0

1678

1643

1577

1527

1489 1423 1339

(MED-HI)

MED-LO

3.5

1453

1440

1426

1363

1349

1314 1253 1205

LOW

3.0

1259

1239

1220

1181

1159

1118 1082 1015

886

849

All furnaces ship as high speed cooling and medium-speed heating. Installer must adjust blower cooling & heating speed as needed.

For most jobs, about 400 CFM per ton when cooling is desirable.

INSTALLATION IS TO BE ADJUSTED TO OBTAIN TEMPERATURE RISE WITHIN THE RANGE SPECIFIED ON THE RATING PLATE.

At higher altitudes, a properly de-rated unit will have approximately the same temperature rise at a particular CFM, while the ESP at that CFM will be lower.

AMEH96

BLOWER PERFORMANCE DATA

(CFM & TEMPERATURE RISE VS. EXTERNAL STATIC PRESSURE)
Model
-------------Heating Speed
As Shipped

Motor
Speed

Tons
AC at
0.5"
ESP

EXTERNAL STATIC PRESSURE (Inches Water Column)
0.1

0.3

0.2

0.4

0.5

0.6

0.7

0.8

CFM

RISE

CFM

RISE

CFM

RISE

CFM

RISE

CFM

RISE

CFM

T1 - YELLOW

1.5

726

670

617

553

490

429

378

336

T2 - RED

2.0

905

860

812

761

712

663

610

574

2.5

1121

1074

1039

998

959

923

882

839

T4 - BLUE

3.0

1274

1239

1199

1166

1129

1096

1059

1021

T5 - BLACK

3.0

1306

1261

1232

1195

1162

1132

1090

1057

T1 - YELLOW

1.5

714

667

604

548

484

109

422

367

325

T2 - RED

2.0

904

851

804

761

708

664

612

572

2.5

1125

1075

1045

999

956

921

877

839

T4 - BLUE

3.0

1312

1271

1228

1202

1165

1127

1087

1044

T5 - BLACK

3.5

1423

1386

1354

1321

1278

1210

1134

1032

T1 - YELLOW

3.0

1297

1253

1209

1161

1111

1067

1022

974

T2 - RED

3.5

1507

1455

1422

1377

1334

1296

1251

1195

4.0

1677

1637

1602

1562

1526

1484

1441

1324

T4 - BLUE

4.0

1879

1842

1800

1762

1700

1566

1437

1319

T5 - BLACK

5.0

2044

1967

1894

1795

1702

1578

1452

1320

T1 - YELLOW

3.0

1331

1275

1206

1145

1080

1021

953

889

T2 - RED

3.5

1512

1452

1392

1336

1279

1219

1175

1115

4.0

1713

1666

1614

1569

1513

1468

1414

1364

T4 - BLUE

4.0

1892

1845

1802

1752

1707

1656

1614

1577

T5 - BLACK

5.0

2080

2038

2005

1960

1920

1879

1843

1791

AMEH960403BX*
T3 - ORANGE
(MED-HI)

AMEH960603BX*
T3 - ORANGE
(MED-HI)

AMEH960805CX*
T3 - ORANGE
(MED-HI)

AMEH961005DX*
T3 - ORANGE
(MED-HI)

All furnaces ship as high speed cooling and medium-speed heating. Installer must adjust blower cooling & heating speed as needed.

For most jobs, about 400 CFM per ton when cooling is desirable.

INSTALLATION IS TO BE ADJUSTED TO OBTAIN TEMPERATURE RISE WITHIN THE RANGE SPECIFIED ON THE RATING PLATE.

At higher altitudes, a properly de-rated unit will have approximately the same temperature rise at a particular CFM, while the ESP at that CFM will be lower.

GCH95 / GCH9115

BLOWER PERFORMANCE DATA

BLOWER PERFORMANCE
(CFM & Temperature Rise vs. External Static Pressure)
Tons AC

Model
Heating Speed
As Shipped

Motor
Speed

at 0.5"
ESP

EXTERNAL STATIC PRESSURE (Inches Water Column)
0.1

0.2

0.3

0.4

0.6

0.5

0.7

0.8

CFM RISE CFM RISE CFM RISE CFM RISE CFM RISE CFM CFM CFM

HIGH

3.0

1415

1352

1290

1196

1127

1035 936

825

GCH950453BX*

MED

2.5

1221

1178

1127

1073

1007

932

834

733

(MED-HI)

MED-LO

2.0

1034

1000

976

935

881

818

733

662

LOW

1.5

860

845

812

783

740

682

619

534

HIGH

3.0

1431

1368

1296

1228

1150

1055 962

860

GCH950703BX*

MED

2.5

1212

1182

1138

1091

1019

944

871

769

(MED-HI)

MED-LO

2.0

1002

978

956

921

878

825

738

647

LOW

1.5

813

805

790

759

726

689

644

605

HIGH

4.0

1755

1674

1632

1510

1423

1325 1241 1116

GCH950704CX*

MED

3.5

1656

1585

1536

1429

1355

1268 1145 1059

(MED-HI)

MED-LO

3.0

1551

1488

1427

1353

1290

1195 1100 1017

LOW

2.5

1286

1258

1241

1185

1112

1067 983

HIGH

4.0

1734

1652

1578

1508

1413

1336 1248 1154

GCH960904CX*

MED

3.5

1642

1558

1487

1418

1336

1243 1164 1039

(MED-HI)

MED-LO

3.0

1522

1458

1396

1321

1253

1182 1101 986

LOW

2.5

1287

1244

1184

1148

1098

1034 953

HIGH

5.0

2189

2109

2025

1948

1862

1757 1644 1537

GCH950905DX*

MED

4.0

1885

1831

1776

1711

1637

1539 1453 1346

(MED-HI)

MED-LO

3.5

1665

1627

1584

1524

1462

1400 1323 1220

LOW

3.0

1474

1440

1401

1356

1310

1255 1193 1109

HIGH

5.0

2134

2103

2029

1941

1906

1818 1733 1625

GCH91155DX*

MED

4.0

1678

1643

1577

1527

1489 1423 1339

(MED-HI)

MED-LO

3.5

1453

1440

1426

1363

1349

1314 1253 1205

LOW

3.0

1259

1239

1220

1181

1159

1118 1082 1015

886

849

All furnaces ship as high speed cooling and medium-speed heating. Installer must adjust blower cooling & heating speed as needed.

For most jobs, about 400 CFM per ton when cooling is desirable.

INSTALLATION IS TO BE ADJUSTED TO OBTAIN TEMPERATURE RISE WITHIN THE RANGE SPECIFIED ON THE RATING PLATE.

At higher altitudes, a properly de-rated unit will have approximately the same temperature rise at a particular CFM, while the ESP at that CFM will be lower.

GME95

BLOWER PERFORMANCE DATA
(CFM & TEMPERATURE RISE VS. EXTERNAL STATIC PRESSURE)
Model
-------------Heating Speed
As Shipped

Motor
Speed

Tons
AC at
0.5"
ESP

EXTERNAL STATIC PRESSURE (Inches Water Column)
0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

CFM

RISE

CFM

RISE

CFM

RISE

CFM

RISE

CFM

RISE

CFM

T1 - YELLOW

1.5

726

670

617

553

490

429

378

336

T2 - RED

2.0

905

860

812

761

712

663

610

574

2.5

112 1

1074

1039

998

959

923

882

839

T4 - BLUE

3.0

127 4

1239

1199

1166

1129

1096

1059

1021

T5 - BLACK

3.0

130 6

1261

1232

1195

1162

1132

1090

1057

T1 - YELLOW

1.5

714

667

604

548

484

109

422

367

325

T2 - RED

2.0

904

851

804

761

708

664

612

572

2.5

112 5

1075

1045

999

956

921

877

839

T4 - BLUE

3.0

131 2

1271

1228

1202

1165

1127

1087

1044

T5 - BLACK

3.5

142 3

1386

1354

1321

1278

1210

1134

1032

T1 - YELLOW

3.0

129 7

1253

1209

1161

1111

1067

1022

974

T2 - RED

3.5

150 7

1455

1422

1377

1334

1296

1251

1195

4.0

167 7

1637

1602

1562

1526

1484

1441

1324

T4 - BLUE

4.0

187 9

1842

1800

1762

1700

1566

1437

1319

T5 - BLACK

5.0

204 4

1967

1894

1795

1702

1578

1452

1320

T1 - YELLOW

3.0

133 1

1275

1206

1145

1080

1021

953

889

T2 - RED

3.5

151 2

1452

1392

1336

1279

1219

1175

1115

4.0

171 3

1666

1614

1569

1513

1468

1414

1364

T4 - BLUE

4.0

189 2

1845

1802

1752

1707

1656

1614

1577

T5 - BLACK

5.0

208 0

2038

2005

1960

1920

1879

1843

1791

GME950403BX*
T3 - ORANGE
(MED-HI)

GME950603BX*
T3 - ORANGE
(MED-HI)

GME950805CX*
T3 - ORANGE
(MED-HI)

GME951005DX*
T3 - ORANGE
(MED-HI)

All furnaces ship as high speed cooling and medium-speed heating. Installer must adjust blower cooling & heating speed as needed.

For most jobs, about 400 CFM per ton when cooling is desirable.

INSTALLATION IS TO BE ADJUSTED TO OBTAIN TEMPERATURE RISE WITHIN THE RANGE SPECIFIED ON THE RATING PLATE.

At higher altitudes, a properly de-rated unit will have approximately the same temperature rise at a particular CFM, while the ESP at that CFM will be lower.

*MH95[0453,0704,0905D]
*MH95[0703,0904,1155]

WIRING DIAGRAM

BLOWER
COMPARTMENT
DOOR SWITCH
(OPEN WHEN
DOOR OPEN)

24 VAC
HUMIDIFIER

24 VAC

TR (6)

GAS
HI VALVE

MVH (12)

PM
G

OR
2

12
2ND
STAGE
DELAY
MODE

*
*

HEAT
OFF
DELAY

BL
YL

HLI (7)

RO2 (11)
RO1 (5)

MANUAL RESET ROLLOUT
LIMIT CONTROL(S)
(SINGLE CONTROL ON 45K BTU)
24 VAC

TH (3)

40 VA
TRANSFORMER
TERMINALS

XFMR-H

115 VAC

XFMR-H

FLAME SENSOR

FS
HOT SURFACE
IGNITER

115 VAC HOT AND PARK TERMINALS
HEAT-H

IGN

INTEGRATED CONTROL MODULE

LINE-H

SEE
NOTE 4

MANUAL RESET AUXILIARY AUTO RESET
LIMIT CONTROLS
PRIMARY
LIMIT
CONTROL

RD
GY

SEE
NOTE 6

GND

PSO (4)

FACTORY SETTINGS
SHOW N

COOL-H

ID BLOWER
PRESSURE
SWITCH

HLO (1)

OFF

DIAGNOSTIC
LED

PS (10)
TO
MICRO

GY
3
6

FRONT COVER
PRESSURE SWITCH

INTEGRATED
CONTROL
MODULE
ON

MVL(2)

FUSE

WH
ID
BLWR

IND
H E LO
AT
-H

GY
OR

COOL-H

CIRCULATOR
BLOWER

GR
RD

BK (HI)
BL (MED)
OR (MED LOW)
RD (LOW)

CAPACITOR
PU
BLOWER COMPARTMENT
MANUAL RESET
AUXILIARY LIMITS
(1) IN UPFLOW
BLOWER DECK
(2) IN C'FLOW
BLOWER HOUSING

GND
BK
WH
INDUCED DRAFT
BLOWER

LINE-H
JUNCTION BOX
DOOR
SWITCH

WARNING:
DISCONNECT POWER
BEFORE SERVICING.
WIRING TO UNIT
MUST BE
PROPERLY
POLARIZED
AND GROUNDED.

WH
AUTO RESET
PRIMARY LIMIT
CONTROL

PU
BL

HOT
SURFACE
IGNITER
0

MANUAL RESET ROLLOUT LIMIT CONTROL(S)
( SINGLE CONTROL ON 45K BTU )

24 VAC
HUMIDIFIER

N
O

FRONT COVER
PRESSURE SWITCH
GY
GND

JUNCTION
BOX

GND

STEADY ON = NORMAL OPERATION

DISCONNECT

LOW VOLTAGE (24V)

= CONTROL FAILURE

1 FLASH

= SYSTEM LOCKOUT (RETRIES EXCEEDED)

2 FLASHES = PRESSURE SWITCH STUCK CLOSED

HI VOLTAGE (115V)
HI VOLTAGE FIELD

3 FLASHES = PRESSURE SWITCH STUCK OPEN

4 FLASHES = OPEN HIGH LIMIT

5 FLASHES = FLAME SENSE WITHOUT GAS VALVE

6 FLASHES = OPEN ROLLOUT OR OPEN FUSE

7 FLASHES = LOW FLAME SIGNAL

LOW VOLTAGE FIELD

EQUIPMENT GND
FIELD GND
FIELD SPLICE
SWITCH (TEMP.)

JUNCTION
TERMINAL
INTERNAL TO
INTEGRATED CONTROL

8 FLASHES = CHECK IGNITER OR IMPROPER GROUNDING
C CONTINUOUS/RAPID FLASHES = REVERSED 115 VAC POLARITY

0140F00663 REV. A

FLAME
SENSOR

OR
GAS VALVE (HONEY WELL)

PK PINK
BR BROWN
WH WHITE
BL BLUE
GY GRAY
RD RED

OFF

COLOR CODES:
YL YELLOW
OR ORANGE
PU PURPLE
GN GREEN
BK BLACK

WARNING:DISCONNECT POWER BEFORE
SERVICING.WIRING TO UNIT MUST BE
PROPERLY POLARIZED AND GROUNDED.
TO 115 VAC / 1Ø / 60HZ
POWER SUPPLY WITH
OVERCURRENT PROTECTION
DEVICE

2 CIRCUIT
CONNECTOR

OVERCURRENT PROTECTION DEVICE

WH
ID BLOWER
PRESSURE
SWITCH

GND

TO 115VAC/ 1 Ø /60 HZ POWER SUPPLY WITH

OR
N
O

DISCONNECT

YL
RD

ELECTRONIC
AIR CLEANER

EAC-H

BURNER COMPARTMENT

CIRCULATOR
BLWR

HI H
AT
HE

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.

MVC (9)

115 VAC

GND

GND (8)

40 VA
TRANSFORMER
24V THERMOSTAT
CONNECTIONS

INTEGRATED
CONTROL MODULE

HUMIDIFIER

PLUG CONNECTION

IGNITER
SWITCH (PRESS.)
OVERCURRENT
PROT. DEVICE

NOTES:
1. SET HEAT ANTICIPATOR ON ROOM THERMOSTAT AT 0.7 AMPS.
2. MANUFACTURER'S SPECIFIED REPLACEMENT PARTS MUST BE USED WHEN SERVICING.
3. 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. USE COPPER CONDUCTORS ONLY.
4. IF HEATING AND COOLING BLOWER SPEEDS ARE NOT THE SAME, DISCARD JUMPER BEFORE CONNECTING BLOWER LEADS. UNUSED
BLOWER LEADS MUST BE PLACED ON "PARK" TERMINALS OF INTEGRATED CONTROL OR TAPED.
5. UNIT MUST BE PERMANENTLY GROUNDED AND CONFORM TO N.E.C. AND LOCAL CODES.
6. TO RECALL THE LAST 5 FAULTS, MOST RECENT TO LEAST RECENT, DEPRESS SWITCH FOR MORE THAN 2 SECONDS WHILE IN
STANDBY (NO THERMOSTAT INPUTS)

Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.
49

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

ACSH96 / GCH95 / GCH9
*MH950905CX

Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.

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

GME95 / AMEH96

Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.

SPECIAL INSTRUCTIONS FOR PRODUCTS INSTALLED
IN THE STATE OF MASSACHUSETTS

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.

VENT/FLUE
TEE

DISTANCE BETWEEN
VENT AND GRADE

COMBUSTION
AIR INTAKE.
DISTANCE BETWEEN
COMBUSTION AIR
INTAKE AND GRADE

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:
1. INSTALLATION OF CARBON MONOXIDE DETECTORS. At
the time of installation of the side wall horizontal vented gas
fueled equipment, the installing plumber or gasfitter shall
observe that a hard wired carbon monoxide detector with
an alarm and battery back-up is installed on the floor level
where the gas equipment is to be installed. In addition, the
installing plumber or gasfitter shall observe that a 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.

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.

THIS PAGE LEFT INTENTIONALLY BLANK

NOTE: SPECIFICATIONS AND PERFORMANCE DATA LISTED HEREIN
ARE SUBJECT TO CHANGE WITHOUT NOTICE.

Quality Makes the Difference!
“All of our systems are designed and manufactured with the same high quality standards regardless of size or efficiency. We have designed these units to significantly reduce the most frequent
causes of product failure. They are simple to service and forgiving to operate. We use quality
materials and components. Finally, every unit is run tested before it leaves the factory. That’s why
we know. . . There’s No Better Quality.”
Visit our web sites at www.goodmanmfg.com or www.amana-hac.com for information on:

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Products
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Goodman Mfg Co Lp Furnace Gas Fired Warm Air Users Manual

GAS-FIRED WARM AIR FURNACE to the manual e271dcec-018f-48b3-97ec-97efb66f6c17

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