80% 2-STAGE VARIABLE SPEED GAS FURNACE
INSTALLATION INSTRUCTIONS
ATTENTION INSTALLATION 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 operations.
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.
Placeholder
for Bar
Code
Keep this literature in a safe place for future reference.
Whirlpool Gold® Models
WGFD295, WGFM295
WPIO-369B
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.
Tradewinds Distributing Company, LLC
14610 Breakers Drive
Jacksonville, Florida 32258
TABLE OF CONTENTS
GAS FURNACE SAFETY PRECAUTIONS ....................................3
Additional Safety Considerations.................................................4
PRODUCT DESCRIPTION AND APPLICATION ..........................4
Shipping Inspection .....................................................................4
Electrostatic Discharge (ESD) Precautions..................................4
To the Installer..............................................................................4
Important Note to the Owner Regarding Product Warranty .......5
Product Application......................................................................5
LOCATION REQUIREMENTS AND CONSIDERATIONS ............6
Clearances and Accessibility .......................................................7
Furnace Suspension ....................................................................7
Existing Furnace Removal ...........................................................8
Thermostat Location ....................................................................8
COMBUSTION AND VENTILATION AIR REQUIREMENTS........8
Category I Venting—Vertical Venting...........................................8
Category I Furnaces Only—Exterior Masonry Chimneys............9
ELECTRICAL CONNECTIONS ....................................................13
Wiring Harness ...........................................................................13
115-Volt Line Connections.........................................................13
Junction Box Relocation............................................................14
24-Volt Thermostat Wiring .........................................................14
24-Volt Dehumidistat Wiring ......................................................16
Fossil Fuel Applications .............................................................16
115-Volt Line Connection of Accessories (Humidifier and
Electronic Air Cleaner)................................................................16
GAS SUPPLY AND PIPING..........................................................17
High Altitude Derate ...................................................................17
Propane Gas Conversion...........................................................17
Gas Piping Connections ............................................................18
Gas Piping Checks.....................................................................19
Propane Gas Tanks and Piping .................................................19
CIRCULATING AIR AND FILTERS..............................................21
Ductwork—Airflow .....................................................................21
Filters—Read this Section Before Installing the Return Air
Ductwork ....................................................................................21
START-UP PROCEDURE AND ADJUSTMENT .........................22
Heat Anticipator Setting.............................................................22
Furnace Operation .....................................................................22
Furnace Start-Up .......................................................................22
Furnace Shutdown.....................................................................22
2
Gas Supply Pressure Measurement ..........................................22
Gas Manifold Pressure Measurement and Adjustment.............23
Gas Input Rate Measurement—Natural Gas Only.....................24
Temperature Rise .......................................................................24
Circulator Blower Speeds ..........................................................25
Blower Heat Off Delay Timings ..................................................27
NORMAL SEQUENCE OF OPERATION .....................................27
Power Up....................................................................................27
Heating Mode.............................................................................27
Cooling Mode .............................................................................28
Fan Only Mode ...........................................................................28
Operational Checks....................................................................28
SAFETY CIRCUIT DESCRIPTION ...............................................28
General .......................................................................................28
Integrated Control Module .........................................................28
Primary Limit Control..................................................................29
Auxiliary Limit Controls...............................................................29
Rollout Limit Controls.................................................................29
Pressure Switches......................................................................29
Flame Sensor..............................................................................29
MAINTENANCE ............................................................................29
Annual Inspection.......................................................................29
Filters ..........................................................................................29
Burners .......................................................................................30
Induced Draft and Circulator Blowers........................................30
Condensate Trap and Drain System (Qualified Servicer Only)..30
Flame Sensor (Qualified Servicer Only)......................................30
Flue Passages (Qualified Servicer Only) ....................................30
Before Leaving an Installation....................................................30
Repair and Replacement Parts ..................................................30
TROUBLESHOOTING ..................................................................31
Electrostatic Discharge (ESD) Precautions................................31
Fault Recall .................................................................................31
Resetting from Lockout..............................................................31
Status Codes..............................................................................31
Diagnostic Chart.........................................................................32
DIP Switch Chart ........................................................................38
WIRING DIAGRAM .......................................................................39
ASSISTANCE OR SERVICE .........................................................40
GAS FURNACE SAFETY PRECAUTIONS
Please 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.
Recognize this symbol as a safety precaution.
WARNING
Hazards or unsafe
practices1could result in property
Goodman
damage, product damage, severe personal injury or death.
CAUTION
Hazards or unsafe practices may result in property
damage, product damage, personal injury or death.
WARNING
The manufacturer will not be responsible for any injury
Goodman 114
or property damage arising from improper service or
service procedures. If you install or perform service on
this unit, you assume responsibility for any personal
injury or property damage which may result. Many
jurisdictions require a license to install or service
heating and air conditioning equipment.
WARNING
WARNING
This product containsGoodman
or produces a45
chemical or
chemicals which may cause serious illness or death and
which are known to the State of California 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
Goodman 47
event that the building may be 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.
DANGER
To prevent personal injury or death due to improper
Goodman 44
installation, adjustment, alteration, service or maintenance,
refer to this manual. For additional assistance or
information, consult a qualified installer, service agency
or the gas supplier.
WARNING
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 Goodman
the vicinity of this
42or 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 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.
Goodman
38 HAZARD
CARBON MONOXIDE
POISONING
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.
3
WARNING
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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
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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.
WARNING
Possible property damage,
personal
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48injury 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.
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 the delivery receipt of any visible damage
to the shipment or container.
2. Notify the carrier promptly and request an inspection.
3. With concealed damage, the carrier must be notified as soon
as possible—preferably within 5 days.
4. File the claim with the following support documents within a
9-month statute of limitations.
■ Original or certified copy of the Bill of Lading, or
indemnity bond.
■
Original paid freight bill or indemnity in lieu thereof.
■
Original or certified copy of the invoice, showing trade
and other discounts or reductions.
■
Copy of the inspection report issued by carrier’s
representative at the time damage is reported to carrier.
The carrier is responsible for making prompt inspection of the
damage and for a thorough investigation of each claim. The
distributor or manufacturer will not accept claims from dealers for
transportation damage.
Electrostatic Discharge (ESD) Precautions
WARNING
This unit must not be used as a “construction heater”
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79 on a new
during the finishing phases
of construction
structure. This type of use may result in premature failure
of the unit due to extremely low return air temperatures
and exposure to corrosive or very dirty atmospheres.
WARNING
To prevent possible personal injury or death due to
asphyxiation, this
furnace must66
be Category I vented.
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Do not vent using Category III venting.
Provisions must be made for venting combustion
products outdoors through a proper venting system.
The length of flue pipe could be a limiting factor in
locating the furnace.
Additional Safety Considerations
■
■
This furnace is approved for Category I venting only.
Provisions must be made for venting combustion products
outdoors through a proper venting system. The length of flue
pipe could be a limiting factor in locating the furnace.
PRODUCT DESCRIPTION AND
APPLICATION
Shipping Inspection
All units are securely packed in shipping containers tested
according to International Safe Transit Association specifications.
The carton must be checked upon arrival for external damage. If
damage is found, a request for inspection by carrier’s agent must
be made in writing immediately.
4
NOTE: Discharge static electricity accumulated in the body
before touching the unit. An electrostatic discharge can adversely
affect electrical components.
Use the following steps during furnace installations 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.
NOTE: Do not touch the integrated control module or any
wire connected to the control prior to discharging your body’s
electrostatic charge to ground.
2. Firmly touch a clean, unpainted, metal surface of the furnace
away from the control. Any tools held in a person’s hand
during grounding will be discharged also.
3. Service the integrated control module or connecting wiring
after following the discharge process in Step 2.
NOTE: Do not recharge your body with static electricity by
moving or shuffling your feet or touching ungrounded
objects. If you touch an ungrounded object, repeat Step 2
before touching the control or wires.
4. Follow steps 1 through 3 before removing a new control from
its container or installing the control on a furnace. Return any
old or new controls to their containers before touching any
ungrounded object.
To the Installer
Before installing this unit, please read this manual thoroughly to
familiarize yourself with specific items which must be adhered to,
including, but not limited to:
■ Unit maximum external static pressure
■ Gas pressures
■ Btu input rating
■ Proper electrical connections
■ Circulating air temperature rise
■ Minimum or maximum CFM
■ Motor speed connections
NOTE: These furnaces are designed for Category I venting only.
The vent system is permanently installed according to these
installation instructions.
■ A room thermostat is used to control the furnace. Fixed
jumpers that provide continuous heating cannot be used.
■ Return air ducts are provided and sealed to the furnace.
■ A return air temperature range between 60ºF and 80ºF (16ºC
and 27ºC) is maintained.
■ Air filters are installed in the system and maintained during
construction, replaced as appropriate during construction
and upon completion of construction.
■ The input rate and temperature rise are set according to the
furnace rating plate.
■ 100% outside air is provided for combustion air requirements
during construction. Temporary ducting can be used.
NOTE: Do not connect the temporary duct directly to the
furnace. The duct must be sized according to the instructions
in the “Combustion and Ventilation Air Requirements”
section.
■ The furnace heat exchanger, components, duct system, air
filters and evaporator coils are thoroughly cleaned following
the final construction cleanup.
■ All furnace operating conditions (including ignition, input rate,
temperature rise and venting) are verified according to these
installation instructions.
NOTE: The Commonwealth of Massachusetts requires that the
following additional requirements must also be met:
■ Gas furnaces must be installed by a licensed plumber or gas
fitter.
■ A T-handle gas cock must be used.
■ If the unit is to be installed in an attic, the passageway to and
the service area around the unit must have flooring.
■
Important Note to the Owner Regarding
Product Warranty
Your warranty certificate is supplied as a separate document with
the unit installed by your contractor. Read the limited warranty
certificate carefully to determine what is and is not covered. Keep
the warranty certificate in a safe place. If you are unable to locate
the warranty certificate, please contact your installing contractor,
or contact customer service at 1-866-944-7575 to obtain a copy.
To receive the Lifetime Heat Exchanger Limited Warranty, good
for as long as you own your home, and the 10-Year Parts Limited
Warranty, online registration must be completed within 60 days of
installation. Online registration is not required in California or
Quebec.
Product limited warranty certificates for models currently in
production can be viewed at www.whirlpoolhvac.com. If your
model is not currently in production or does not appear on the
website, please contact your installing contractor or contact
customer service at 1-866-944-7575 to obtain a copy of your
warranty certificate.
To register your unit, go to www.whirlpoolhvac.com. Click on the
manufacturer’s Comfort CommitmentTM Warranty link located at
the bottom center of the home page. Next, click on the Click
Here to Register Your Product link located at the top center of the
page, and complete the forms in the manner indicated.
WARNING
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To prevent property
damage,49
personal injury or death due
to fire, do not install the furnace in a mobile home, trailer
or recreational vehicle.
Product Application
This furnace is primarily designed for residential home-heating
applications.
IMPORTANT:
■ This furnace is not designed or certified for use in mobile
homes, trailers or recreational vehicles.
■ This furnace is not designed or certified for outdoor
applications.
■ The furnace must be installed indoors (for example, attic
space, crawl space or garage area provided the garage area
is enclosed with an operating door).
This furnace can be used in the following nonindustrial
commercial applications:
■
■
■
■
Schools
Office buildings
Churches
Retail stores
■
■
■
■
Nursing homes
Hotels/motels
Common areas
Office areas
NOTE: In such applications, the furnace must be installed with
the following stipulations:
■ It must be installed according to the installation instructions
provided and according to 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 “makeup” air unit.
■ All other warranty exclusions and restrictions apply.
This furnace may be used as a construction site heater only if all
of the following conditions are met:
WARNING
Goodman 49
To prevent property damage, personal injury or death due
to fire, do not install the furnace in a mobile home, trailer
or recreational vehicle.
To ensure proper furnace operation, you must install, operate and
maintain the furnace in accordance with these installation and
operation instructions, all local building codes and ordinances. In
their absence, follow the latest edition of the National Fuel Gas
Code (NFPA 54/ANSI Z223.1), and/or CAN/CSA B149 Installation
Codes, local plumbing or waste water codes and other
applicable codes.
A copy of the National Fuel Gas Code (NFPA 54/ANSI Z223.1)
can be obtained from any of the following:
American National Standards Institute
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 Installation Codes can also be
obtained from:
CSA International
178 Rexdale Boulevard
Etobicoke, Ontario, Canada M9W 1R3
5
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.
In the U.S.A., this furnace must be installed in accordance with
the latest edition of the ANSI Z223.1 booklet titled “National Fuel
Gas Code” (NFPA 54), and the requirements or codes of the local
utility or other authority having jurisdiction. In Canada, this
furnace must be installed in accordance with the current CAN/
CGA-B149.1 and 2 Gas Installation Codes, local plumbing or
waste water codes and other applicable codes. Additional helpful
publications available from the NFPA are, NFPA 90A—Installation
of Air Conditioning and Ventilating System and NFPA 90B—Warm
Air Heating and Air Conditioning System.
All venting shall be in accordance with PART 7, Venting of
Equipment, of the National Fuel Gas Code, ANSI Z223.1, or
applicable local building and/or air conditioning codes. These
publications are available from:
National Fire Protection Association, Inc.
1 Batterymarch Park
Quincy, MA 02269
NOTE: Furnaces with NOx screens meet the California NOx
emission standards and California seasonal efficiency standards.
Annual inspections of the furnace and its vent system is strongly
recommended.
LOCATION REQUIREMENTS AND CONSIDERATIONS
Your unit model type determines which installation procedures
must be used. For WGFM28 models, you must follow instructions
for horizontal left, horizontal right or upflow installations only.
These furnaces are not approved for downflow installations.
Downflow models WGFD28 are not approved for horizontal or
upflow installations. For these models, use only the instructions
for downflow installation only.
■
WARNING
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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.
■ Check that the temperature of the return air entering the
furnace is between 55°F and 100°F (13ºC and 38ºC) when the
furnace is heating.
■ Provide provisions for venting combustion products outdoors
through a proper venting system.
NOTE: The length of flue piping can be a limiting factor in the
location of the furnace.
■ Ensure that adequate combustion air is available for the
furnace. Improper or insufficient combustion air can expose
the 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. If the floor becomes wet or
damp at times, place the furnace above the floor on a
concrete base sized approximately 1¹⁄₂" (3.8 cm) larger than
the base of the furnace.
■ Ensure that the upflow or horizontal furnaces are not installed
directly on carpeting, or any other combustible material.
NOTE: The only combustible material allowed is wood.
6
■
■
■
■
■
■
Exposure to contaminated combustion air will result in safety
and performance-related problems.
NOTE: 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
Masonry acid washing materials
If the furnace is used in connection with a cooling coil unit,
install the furnace upstream or in parallel with the cooling coil
unit. Premature heat exchanger failure will result if the cooling
coil unit is placed ahead of the furnace.
If the furnace is installed in an application where the typical
operating sound level of a furnace is deemed objectionable,
an optional sound reduction kit is available. Consult your
local distributor for more details.
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" (45.7 cm) above the floor. Protect the
furnace from physical damage by vehicles.
If the furnace is installed horizontally, ensure that the furnace
access doors are not on the “up/top” or “down/bottom” side
of the furnace. The furnace access doors must be vertical so
that the burners fire horizontally into the heat exchanger.
Do not connect the furnace to a chimney flue that serves a
separate appliance designed to burn solid fuel.
On counterflow installations, the air conditioning coil must be
downstream from the furnace heat exchanger.
Counterflow Installation Over a Noncombustible Floor
■
Before setting the furnace over the plenum opening, ensure
that the surface around the opening is smooth and level. A
tight seal should be made between the furnace base and
floor by using a silicone rubber caulking compound or
cement grout.
Counterflow Installation Over a Combustible Floor
■
If installation over a combustible floor becomes necessary,
use an accessory subbase (see Specification Sheet
applicable for your model for details). A special accessory
subbase must be used for upright counterflow unit
installations over any combustible material, including wood.
Refer to subbase instructions for installation details. Follow
the instructions with the subbase for proper installation.
NOTES:
■ Do not install the furnace directly on carpeting, tile or
other combustible material other than wood flooring.
■
The subbase will not be required if an air conditioning coil
is installed between the supply air opening on the furnace
and the floor.
Clearances and Accessibility
■
■
■
Adequate combustion/ventilation air must be supplied to the
closet or enclosure.
Furnace must be completely sealed to the floor or base.
Combustion/ventilation air supply pipes must terminate 12"
(30.5 cm) from the top of the closet or enclosure and 12"
(30.5 cm) from the floor of the closet or enclosure.
NOTE: Do not remove the solid base plate for the side return.
Return air ducts must be completely sealed to the furnace
and terminate outside the enclosure surfaces.
Horizontal Installation—WGFM28 Models Only
Line contact to framing is permitted when installed in the
horizontal configuration. Line contact is defined as the portion of
the cabinet that is formed by the intersection of the top and side.
IMPORTANT: Accessibility clearance, where greater, should take
precedence over minimum fire protection clearance.
■ A gas-fired furnace for installation in a residential garage
must be installed so that the ignition source and burners are
located not less than 18" (45.7 cm) above the floor and are
protected or located to prevent physical damage by vehicles.
■ A gas furnace must not be installed directly on carpeting, tile,
or other combustible materials other than wood flooring.
Unobstructed front clearance of 24" (61 cm) for servicing is
recommended.
Clearances to Combustibles—in. (cm)
Vent Pipe
B1-Vent
1 (2.5)
Single Wall
Connector Sides
Front
Back Top (Plenum)
6 (15.2)
3 (7.6)
0
1 (2.4)
1 (2.5)
NOTE: Top clearance for horizontal configuration is 1" (2.5 cm).
Furnace Suspension
If suspending the furnace from rafters or joists, use ³⁄₈" threaded
rod and 2" x 2" x ¹⁄₈" (5.1 cm x 5.1 cm x 3.2 mm) angle iron as
shown in “Suspended Furnace” illustration. The length of rod will
depend on the application and the clearances necessary.
NOTE: In a horizontal installation, the air conditioning coil must
be adequately supported by the proper brackets and supports.
Inadequate coil support can result in furnace cabinet distortion
and air leakage.
Suspended Furnace
B
B
A
A
C
H
G
C
Clear Combust G 2009
D
F
E
E
A. Top clearance—1" (2.5 cm)
B. Vent pipe clearance—6" (15.2 cm)
for single wall connector, 1"
(2.5 cm) for B-1 vent
C. Back clearance—0"
D. Side clearance—1" (2.5 cm)
E. Front clearance—3" (7.6 cm)
D
A. ³⁄₈" (1 cm) diameter threaded
D. Tilt outward to allow for door
rod (6)
and circulator blower removal.
B. 8" (20.3 cm) minimum clearance E. Position as close as possible to
between center rod and furnace
blower deck to allow for
cabinet to allow for circulator
circulator blower removal.
blower removal.
F. 2" x 2" x ¹⁄₈" (5.1 cm x 5.1 cm x
3.2 mm) angle iron (3)
C. Level furnace end to end, slight
forward tilt with front 0" to ³⁄₄"
G. Support nuts
(1.9 cm) below back.
H. Hold down nuts
7
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-2.3 latest edition Section 1.23.1.
The following steps shall be followed with each appliance
connected to the venting system placed in operation, while any
other appliances connected to the venting system are not in
operation:
1. Seal any unused openings in the venting system.
2. Inspect the venting system for proper size and horizontal
pitch, as required by the National Fuel Gas Code, ANSI
Z223.1 or the Natural Gas and Propane Installation Code,
CSA B149.1-05 and these instructions. Determine that there
is no blockage or restriction, leakage, corrosion and other
deficiencies which could cause an unsafe condition.
3. As far as practical, close all building doors and windows and
all doors between the space in which the appliance(s)
connected to the venting system are located and other
spaces of the building.
4. Close fireplace dampers.
5. Turn on clothes dryers and any appliance not connected to
the venting system. Turn on any exhaust fans, such as range
hoods and bathroom exhausts, so they shall operate at
maximum speed. Do not operate a summer exhaust fan.
6. Follow the lighting instructions. Place the appliance being
inspected in operation. Adjust thermostat so appliance shall
operate continuously.
7. Test for spillage from draft hood appliances at the draft hood
relief opening after 5 minutes of main burner operation. Use
the flame of a match or candle.
8. 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.
9. If improper venting is observed during any of the above tests,
the venting system must be corrected in accordance with the
National Fuel Gas Code, ANSI Z223.1/NFPA 54 and/or
Natural Gas and Propane Installation Code, CSA B149.1-05.
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 Natural Gas and
Propane Installation Code, CSA B149.1-05.
Thermostat Location
The thermostat should be placed approximately 5 ft (1.5 m) from
the floor on a vibration-free, inside wall in an area having good air
circulation.
NOTE: Do not install the thermostat where it may be influenced
by any of the following:
■ Drafts, or dead spots behind doors, in corners or under
cabinets
■ Hot or cold air from registers
■ Radiant heat from the sun
■ Light fixtures or other appliances
■ Radiant heat from a fireplace
■ Concealed hot or cold water pipes or chimneys
■ Unconditioned areas behind the thermostat, such as an
outside wall
Consult the instructions packaged with the thermostat for
mounting instructions and further precautions.
COMBUSTION AND VENTILATION AIR REQUIREMENTS
WARNING
To avoid property
damage, personal
Goodman
51 injury or death,
sufficient fresh air for proper combustion and ventilation
of flue gases must be supplied. Most homes require
outside air be supplied into 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 that there is an
adequate supply of combustion and ventilation air for the other
appliances. Refer to the latest edition of the National Fuel Gas
Code NFPA 54/ANSI Z223.1 or Natural Gas and Propane
Installation Code, CSA B149.1-05 or applicable provisions of the
local building codes for determining the combustion air
requirements for the appliances.
8
NOTE: This furnace must use indoor air for combusion. It cannot
be installed as a direct vent, or sealed combustion, furnace.
Most homes will require outside air to 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.
Category I Venting—Vertical Venting
WARNING
Goodman 66
To prevent possible personal injury or death due to
asphyxiation, this furnace must be Category I vented.
Do not vent using Category III venting.
Provisions must be made for venting combustion
products outdoors through a proper venting system.
The length of flue pipe could be a limiting factor in
locating the furnace.
Category I Venting is venting at a nonpositive pressure. A furnace
vented as Category I is considered a fan-assisted appliance. The
vent system does not have to be “gas tight.”
NOTE: Single-stage gas furnaces with induced draft blowers
draw products of combustion through a heat exchanger allowing,
in some instances, common venting with natural draft appliances
(for example, water heaters).
All installations must be vented in accordance with National Fuel
Gas Code NFPA 54/ANSI Z223.1—latest edition. In Canada, the
furnaces must be vented in accordance with the National
Standard of Canada, CAN/CSA B149.1 and CAN/CSA B149.2—
latest editions and amendments.
NOTE: The vertical height of the Category I venting system must
be at least as great as the horizontal length of the venting system.
WARNING
To prevent possible personal injury or death, due to
asphyxiation, common venting with other manufacturer's
Goodman
67
induced draft appliances
is not allowed.
The minimum vent diameter for the Category I venting system is
as shown in the Minimum Vent chart.
Minimum Vent
Model
Upflow
Counterflow
70
4" (10.2 cm)
4" (10.2 cm)
90
4" (10.2 cm)
4" (10.2 cm)
115
5" (12.7 cm)
4" (10.2 cm)
Under some conditions, larger vents than those shown in the
Minimum Vent chart may be required or allowed. 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.
Upflow or horizontal units are shipped with the induced draft
blower discharging from the top of the furnace. (“Top” is as
viewed for an upflow installation.) The induced draft blower can
be rotated 90 degrees with the Chimney Transition Bottom kit
(0270F01119) for Category I venting. For horizontal installations,
a 4" (10.2 cm) single-wall pipe can be used to extend the induced
draft blower outlet ¹⁄₂" (1.3 cm) beyond the furnace cabinet.
NOTE: This product is not designed for counterclockwise
induced draft blower rotation.
Vent the furnace in accordance with the National Fuel Gas Code
NFPA 54/ANSI Z223.1—latest edition. In Canada, vent the
furnace in accordance with the National Standard of Canada,
CAN/CSA B149.1 and CAN/CSA B149.2—latest editions and
amendments.
Venting—Furnace Installed in Horizontal Position
NOTE: This furnace is not design certified to be horizontally
vented through an exterior side wall.
The following describes an optional venting procedure when the
furance is installed in the horizontal left discharge position.
To rotate the induced draft blower clockwise, you will need to
purchase one chimney transition bottom kit (Part Number
0270F01119).
1. Disconnect electrical power from the furnace.
2. Disconnect the induced draft blower power leads, flue pipe
and pressure switch tubing.
3. Remove the round cutout from the right side of the wrapper.
4. Remove and save the 4 screws that fasten the induced draft
blower to the flue collector box.
5. Remove and save the 3 screws that hold the chimney
assembly to the induced draft blower.
6. Remove and save the 4 screws that fasten the chimney top to
the chimney bottom.
7. Remove the chimney transition bottom from the transition
bottom kit.
8. Install the chimney top with the 4 screws retained from Step
6 onto the new chimney transition bottom from the transition
bottom kit.
9. Remove the induced draft blower and install the new chimney
assembly to it using the 3 screws retained in Step 5.
10. Rotate the induced draft blower 90 degrees to the right,
feeding the flue pipe through the round cutout from the
outside of the wrapper, and fitting the blower onto the
chimney top assembly.
11. Secure the pipe to the chimney top from the front, top and
bottom using 3 screws. Rotate the induced draft blower to
properly orient the assembly.
NOTE: If the pipe section is less than 18" (45.7 cm), then
attach it directly to the chimney top on 3 sides, and feed it
through the round cutout from the inside of the wrapper.
12. Reattach the induced draft blower using the 4 screws
retained in Step 4. Ensure that the gasket located between
the induced draft blower and collector box is rotated
accordingly.
13. Reconnect the induced draft blower power leads.
NOTE: If the wires are not long enough, pull extra wire from
the wire bundle in the blower compartment.
14. Reconnect the remaining flue pipe and the pressure switch
tubing. Ensure that all wires and the pressure switch tubing
are at least 1" (2.5 cm) from the flue pipe, or any other hot
surface.
15. Reconnect electrical power to the furnace.
NOTE: In a horizontal installation, the air conditioning coil must
be adequately supported by the proper brackets and supports.
Inadequate coil support can result in furnace cabinet distortion
and air leakage.
Category I Furnaces Only—Exterior Masonry
Chimneys
An exterior masonry chimney is defined as a “Masonry chimney
exposed to the outdoors on one or more sides below the roof
line.” The ability to use a clay-lined masonry chimney depends on
a parameter not associated with interior chimneys. This variable
is the geographic location of the installation. Researchers have
discovered that the winter design temperatures have a direct
impact on the suitability of this type of venting. In most situations,
the existing masonry chimneys will require a properly-sized
metallic liner.
Counterflow units are shipped with the induced draft blower
discharging from the top (as viewed for a counterflow installation)
of the furnace.
Vent the furnace in accordance with the National Fuel Gas Code
NFPA 54/ANSI Z223.1—latest edition. In Canada, vent the
furnace in accordance with the National Standard of Canada,
CAN/CSA B149.1 AND CAN/CSA B149.2—latest editions and
amendments.
WARNING
Never allowGoodman
the products
68 of combustion, including carbon
monoxide, to enter the return ductwork or circulation air
supply.
9
WARNING
Checklist Summary
Possiblility of property damage, personal injury or death.
Damaging condensation can occur inside masonry
Goodman
69 Category I appliance
chimneys when a single
fan-assisted
(80% AFUE furnace) is vented without adequate dilution
air. Do not connect an 80% furnace to a masonry chimney
unless the furnace is common vented with a draft hood
equipped appliance or the chimney is lined with a metal
liner or Type B metal vent. All installations using masonry
chimneys must be sized in accordance with the
appropriate venting tables. If an 80% furnace is common
vented with a draft hood equipped appliance, the potential
for condensation damage may still exist with extremely
cold conditons, long vent connectors, exterior chimneys
or any combination of these conditions. The risk of
condensation damage is best avoided by using the
masonry chimney as a pathway for properly-sized metal
liner or Type B metal vent.
Proper chimney
termination?
(Check 1)
B
C
Line, terminate with
listed vent cap
(Fix 1)
No
Change venting
arrangements
(Fix 2)
No
Rebuild crown
(Fix 3)
and/or reline
(Fix 4)
Yes
D
R
E
Crown in good
condition?
(Check 3)
F
Mult Flue Clay Chimney
G 2009
Yes
G
Flowchart
G
2009
Cleanout free of
debris?
(Check 4)
Q
P
O
Yes
I
Liner in good
condition?
(Check 5)
K
M
A. Crown
B. Wash
C. Roof line
D. Clay tile size: 8" x 8" x
12" (24.3 cm x 24.3 cm
x 30.5 cm) (each x 24"
[61 cm] length)
E. Attic floor
F. ¹⁄₂" to 1 " (1.3 cm to
2.5 cm) air space
H
J
N
10
No
Yes
Chimney channel
free of solid and
liquid fuel
appliances?
(Check 2)
Typical Multiple Flue Clay Tile Chimney
A
This checklist serves as a summary of the items to be checked
before venting an 80+ furnace into a masonry chimney. In
addition, we recommend that a qualified serviceman use this
checklist to perform a yearly inspection of the furnace venting
system.
This checklist is only a summary. For detailed information on
each of the procedures mentioned, see the paragraph referenced
with each item.
This inspection is based upon a draft topical report, “Masonry
Chimney Inspection and Relining,” issued by the Gas Research
Institute. While not yet finalized, we believe this report represents
the best information on this subject which is currently available.
L
G. Second floor
H. First floor
I. Water heater vent
connector
J. Natural draft water
heater
K. Basement floor
L. Fan-assisted
forced air furnace
M. Forced air furnace
vent connector
N. Clean out
O. Breech
P. Damper
Q. Throat
R. Clay tile size:
generally 12" x 12"
(30.5 cm x 30.5 cm)
(24" [61 cm] length)
No
Reline
(Fix 4)
No
Reline
(Fix 4)
No
Reline
(Fix 4)
Yes
Dilution air
available?
(Check 6)
Yes
Complete the
installation.
(Check 7)
Check 1—Proper Chimney Termination
A masonry chimney used as a vent for gas-fired equipment must
extend at least 3 ft (91.4 cm) above the highest point where it
passes through the roof. It must extend at least 2 ft (61 cm)
higher than any portion of a building within a horizontal distance
of 10 ft (3 m). In addition, the chimney must terminate at least 3 ft
(91.4 cm) above any forced air inlet located within 10 ft (3 m). The
chimney must extend at least 5 ft (1.5 m) above the highest
connected equipment draft hood outlet or flue collar.
If the chimney does not meet these termination requirements, but
all other requirements in the checklist can be met, it may be
possible for a mason to extend the chimney. If this will not be
practical, see “Fix 1—Liner Termination.”
Termination 10 ft (3 m) or Less From Ridge, Wall or Parapet
A
B
Solid fuel appliances include fireplaces, wood stoves, coal
furnaces and incinerators.
Liquid fuel appliances include oil furnaces, oil-fired boilers and
oil-fired water heaters.
Appliances which burn propane (sometimes referred to as LP
[liquefied petroleum]) gas are considered gas-fired appliances.
Check 3—Chimney Crown Condition
B
Damage from condensate normally appears first in the crown. If
any of the following trouble signs are present, the condition of the
crown is not satisfactory.
■ Crown leaning—“Fix 3—Rebuild the Crown”
■ Bricks missing—“Fix 3—Rebuild the Crown”
■ Mortar missing—“Fix 3—Rebuild the Crown”
■ Tile liner cracked—“Fix 4—Relining”
■ No tile liner—“Fix 4—Relining”
■ Salt staining at mortar joints (white stains and mortar
becomes sandy and/or erodes)—“Fix 4—Relining”
IMPORTANT: It may be necessary to follow both “Fix 3—Rebuild
the Crown” and “Fix 4—Relining.”
C
D
10 ft or Less
G 2009
E
A
B
C
F
Check 4—Debris in Cleanout
E
A. 10 ft (3 m) or less
B. 2 ft (61 cm) minimum
C. 3 ft (91.4 cm) minimum
D. Wall or parapet
E. Chimney(s)
Termination More Than 10 ft (3 m) From Ridge, Wall or
Parapet
A
B
C
E
D
10 ft or More
G 2009
A
F
G
I
H
C
D
A. More than 10 ft (3 m)
B. No height above parapet
required when distance from
walls or parapet is more than
10 ft (3 m).
C. 3 ft (91.4 cm) minimum
D. Chimney
Check 2—Any Solid or Liquid Fuel Appliances Vented into
This Chimney Channel
E. Wall or parapet
F. Height above any roof surface
within 10 ft (3 m) horizontally
G. 10 ft (3 m)
H. 2 ft (61 cm) minimum
I. Ridge
A cleanout (dropleg) must be in a location where the upper edge
of the cleanout cover is at least 12" (30.5 cm) below the lower
edge of the lowest chimney inlet opening.
A chimney without a cleanout could become partially blocked by
debris. If no cleanout is present, the chimney must be relined (Fix
4—Relining). Remove the cleanout cover, and examine the
cleanout for debris. If significant amounts of any of the following
are found, reline the chimney (Fix 4—Relining).
■ Fuel oil residue
■ Bricks
■ Mortar or sand
■ Pieces of the tile liner
■ Rusted pieces of the metallic liner
Check 5—Liner Condition
If a metal liner is present, it must be checked. It cannot be
assumed that all existing metal liners are correctly installed and in
good condition.
Remove the lowest existing vent connector and examine the
inside of the elbow or tee at the base of the liner. A small amount
of soot may be considered acceptable, provided the installer
vacuums it away. If rusted pieces of the liner have collected here,
the metal liner must be removed and replaced (Fix 4—Relining).
Next, gently tap the inside of the liner with a Phillips screwdriver.
If the screwdriver perforates the liner, or if the tapping does not
sound like metal hitting metal, the liner must be removed and
replaced (Fix 4—Relining).
REMEMBER: All appliances must be vented inside the liner.
Venting one appliance inside the liner and another appliance
outside the liner is not acceptable.
Next, use a flashlight and a small mirror to look up inside the liner.
B-vent must be supported so as to not come into direct contact
with the chimney walls or tile liner. If it is not, it can probably be
rehung so as to be acceptable. A thimble or fire stop may be
helpful here.
11
Flexible liners should be hung straight or nearly straight. If it is
spiraled in the chimney and in good condition, it should be
rehung. To do this, break the top seal. Pull up and cut off the
excess liner length and refit the top seal. Use caution when doing
this, since the cut edges of flexible liners may be sharp.
The surfaces of the liner must be physically sound. If gaps or
holes are present, the metal liner must be removed and replaced
(Fix 4—Relining). Finally, confirm that the metal liner is the correct
size for the appliances to be installed. Use the GAMA tables and
rules.
NOTE: If a metal liner is not present, a clay tile liner must be
present, or the chimney must be lined (Fix 4—Relining).
Use a flashlight and small mirror at the cleanout or vent
connector to inspect the clay tile liner. If any of the following
problems are present, reline (Fix 4—Relining).
■ Tile sections misaligned
■ Tile sections missing
■ Gaps between tile sections
■ Signs of condensate drainage at the cleanout or vent
connectors
■ Mortar protruding from between tile sections
■ Use of sewer pipe or drainage pipe rather than an approved
fire clay tile
Next, measure the size of the liner. It may be possible to do this
from the cleanout. The liner must be at least as large as the
minimum size established by the tables in National Fuel Gas
Code NFPA 54/ANSI Z223.1—latest edition and in the National
Standard of Canada, CAN/CSA B149.1 and CAN/CSA B149.2—
latest editions and amendments. If the liner is too small or too
large, then the chimney must be relined (Fix 4—Relining).
Check 6—Dilution Air
If gas-fired appliances are to be vented into a clay tile liner, a
source of dilution air is required.
Dilution air cannot be obtained through the following:
■ Induced draft appliances
■ Natural draft appliances with vent dampers
Sufficient dilution air can ordinarily be obtained through the draft
hood of a natural draft appliance only if the appliance’s vent
connector does not include a vent damper. If dilution air will not
be available, the chimney must be relined (Fix 4—Relining).
Check 7—Complete the Installation
If checks 1 through 6 have been satisfactory, and the liner is an
acceptable size as determined by the tables in National Fuel Gas
Code NFPA 54/ANSI Z223.1—latest edition and in the National
Standard of Canada, CAN/CSA B149.1 and CAN/CSA B149.2—
latest editions and amendments, then the clay tile liner can
probably be used as a vent for the gas appliances. However, the
installer must keep in mind the following factors which may
render the tile liner unsuitable for use as a vent:
■ Extremely cold weather
■ Long vent connectors
■ Masonry chimneys with no air gap between the liner and the
bricks—difficult to detect
■ Exterior chimneys (the tables in National Fuel Gas Code
NFPA 54/ANSI Z223.1—latest edition and in the National
Standard of Canada, CAN/CSA B149.1 and CAN/CSA
B149.2—latest editions and amendments assume interior
chimneys)
If, in the judgment of the local gas utility, installer and/or local
codes, one or more of the above factors is likely to present a
problem, the chimney must be relined (Fix 4—Relining).
12
Fix 1—Liner Termination
Any cap or roof assembly used with a liner must be approved by
the liner manufacturer for such use. The liner and cap/roof
assembly must then terminate above the roof in accordance with
the manufacturer’s instructions.
In some cases, a shorter extension above the roof may be
possible with a liner than would be required with a masonry
chimney.
For further information on relining, see “Fix 4—Relining.”
Fix 2—Change Venting Arrangements
If the masonry chimney has more than one channel, it may be
possible to vent the gas appliances into one channel and vent the
solid or liquid fuel appliance(s) into another channel(s). Do not
vent an 80+ furnace inside of a metal liner with other appliances
vented outside the liner.
Alternatively, the homeowner may agree to discontinue use of the
fireplace (solid fuel appliance). If so, the tile liner must be cleaned
to remove creosote buildup. The fireplace opening must then be
permanently sealed.
If oil-fired appliance(s) are being replaced by gas-fired
appliance(s), the tile liner must first be cleaned to remove the fuel
oil residue.
If none of the above options is practical, the furnace may need to
be vented vertically with a B-vent.
Under some conditions, a 90%+ furnace could be installed rather
than an 80% furnace. The 90%+ furnace can be vented
horizontally or vertically through PVC pipe.
Fix 3—Rebuild the Crown
If the chimney crown is damaged, a qualified mason must repair
it in accordance with nationally recognized building codes or
standards. One such standard which may be referenced is the
Standard for Chimneys, Fireplaces, Vents, and Solid Fuel Burning
Appliances, ANSI/NFPA 211.
Fix 4—Relining
Relining options include B-vent and flexible liners.
If the chimney has diagonal offsets, B-vent probably cannot be
used.
If B-vent is to be used, it must be supported adequately.
Supports (such as fire stops or thimbles) must be used to keep
the B-vent from coming into direct contact with the tile liner or
chimney walls. Direct contact would result in higher heat loss,
with an increased possibility of poor venting system
performance.
It is not acceptable to vent one appliance inside the B-vent and
other appliances outside.
The excess space between the B-vent and the chimney walls
must be covered at the top of the chimney by a weatherproof,
corrosion resistant flashing. The B-vent should then be topped
with a listed vent cap. The listed vent cap will, when installed
according to the manufacturer’s instructions, prevent problems
due to rain, birds or wind effects.
A B-vent installed as described in this section is considered to be
an enclosed vent system, and the sizing tables in National Fuel
Gas Code NFPA 54/ANSI Z223.1—latest edition and in the
National Standard of Canada, CAN/CSA B149.1 and CAN/CSA
B149.2—latest editions and amendments may be used.
If a flexible liner is to be used, it must be made of the proper
materials, such as:
■ For most residential applications, an aluminum liner should
be acceptable.
■ If the combustion air supplied to the furnace will be
contaminated with compounds containing chlorine or
fluorine, a liner of AL 29-4C stainless steel should be used.
Common sources of chlorine and fluorine compounds include
indoor swimming pools and chlorine bleaches, paint
strippers, adhesives, paints, varnishes, sealers, waxes (which
are not yet dried) and solvents used during construction and
remodeling. Various commercial and industrial processes
may also be sources of chlorine/fluorine compounds.
■ Heavier gauge 300 and 400 series stainless steel liners were
developed for use with oil or solid-fuel appliances. They are
not suitable for use with gas-fired appliances. Flexible liners
specifically intended and tested for gas applications are listed
in the UL “Gas and Oil Equipment Directory” (UL Standard
1777).
For sizing of flexible liners, see Note 22 and the tables in the
National Fuel Gas Code NFPA 54/ANSI Z223.1—latest edition
and in the National Standard of Canada, CAN/CSA B149.1 and
CAN/ CSA B149.2—latest editions and amendments.
To install the liner, read and follow the liner manufacturer’s
instructions and your local codes. Excess liner length should be
pulled out of the chimney and cut off.
NOTES:
■ Use caution when doing this, as the cut edges of flexible
liners may be sharp.
Do not spiral excess liner inside of the chimney.
Support the liner as recommended by the liner manufacturer.
Some manufacturers of flexible liners offer an insulation sleeve
designed to be added to the liner before it is installed in the
chimney.
NOTE: Poured insulation, either vermiculite or other materials, is
no longer recommended.
Insulation will need to be added to the flexible liner if:
■ It is required by the liner manufacturer’s instructions.
■ The previous liner was properly sized and installed, and
suffered from condensation damage.
■ It is required by your local building codes.
Even if none of the 3 conditions exist which require additional
liner insulation, the installer may wish to consider installing
additional insulation if:
■ The local climate is very cold.
■ The chimney is very tall.
■ The vent connectors used are very long or have a large
number of elbows.
■ Local experience indicates that flexible liners installed without
insulation are likely to have condensation problems.
Insulation must be selected and installed in accordance with the
liner manufacturer’s instructions.
Finally, cap the chimney and terminate the liner in accordance
with the liner manufacturer’s instructions.
■
■
ELECTRICAL CONNECTIONS
WARNING
Goodman
70-A
HIGH VOLTAGE!
To avoid the risk of electrical shock, wiring to
the unit must be polarized and grounded.
WARNING
Goodman
115
HIGH VOLTAGE!
To avoid personal injury or death due to
electrical shock, disconnect electrical
power before servicing or changing any
electrical wiring.
CAUTION
Goodman 59
Label all wires prior to disconnection when servicing
controls. Wiring errors can cause improper and dangerous
operation. Verify proper operation after servicing.
WARNING
HIGH VOLTAGE!
To avoid the risk ofGoodman
injury, electrical
60 shock
or death, the furnace must be electrically
grounded in accordance with local codes or
in their absence, with the latest edition of the
National Electric Code (NEC).
Wiring Harness
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 a copper conductor.
115-Volt Line Connections
Before proceeding with electrical connections, ensure that the
supply voltage, frequency and phase correspond to that
specified on the unit rating plate. Power supply to the furnace
must be NEC Class 1, and must comply with all applicable
codes. The furnace must be electrically grounded in accordance
with local codes or, in their absence, with the latest edition of The
National Electric Code, ANSI NFPA 70 and/or The Canadian
Electric Code CSA C22.1.
Use a separate fused-branch electrical circuit containing properly
sized wire, and fuse or circuit breaker. The fuse or circuit breaker
must be sized in accordance with the maximum overcurrent
protection specified on the unit rating plate. An electrical
disconnect must be provided at the furnace location.
Connect hot, neutral and ground wires as shown in the wiring
diagram located on the unit’s blower door.
Line polarity must be observed when making field connections.
Line voltage connections can be made through either the right or
left side panel. The furnace is shipped configured for a right side
(right side for counterflows or blower compartment for
downflows) electrical connection with the junction box located
inside the burner compartment.
13
To make electrical connections through the opposite side of the
furnace, the junction box must be relocated to the other side of
the burner or blower compartment prior to making electrical
connections.
To relocate the junction box, follow the steps shown in “Junction
Box Relocation.”
NOTE: Wire routing must not to interfere with circulator blower
operation, filter removal or routine maintenance.
Junction Box Relocation
Goodman
56
WARNING
Edges of sheet metal holes may be sharp. Use gloves as
a precaution when removing hole plugs.
Line voltage connections can be made through either the right or
left side panel. The furnace is shipped configured for a left side
electrical connection. To make electrical connections through the
opposite side of the furnace, the junction box must be relocated
to the left side prior to making electrical connections. To relocate
the junction box, perform the following steps.
WARNING
Goodman 116
To prevent personal injury or death due to electric shock,
disconnect electrical power before installing or servicing
this unit.
1. Remove both doors from the furnace.
2. Remove and save the screws securing the junction box to the
right side of the furnace.
3. Models that have the junction box located in the burner or
blower compartment will need to move the junction box
directly over.
4. Attach the junction box to the left side of the furnace using
the screws removed in Step 2.
5. Check the location of the wiring. Confirm that it will not be
damaged by heat from the burners or by the rotation of the
fan. Also confirm that wiring location will not interfere with
filter removal or other maintenance.
After the junction box is in the desired location, use washers to
connect field-supplied conduit to the junction box in accordance
with NEC and local codes. Connect hot, neutral, and ground
wires as shown in the furnace wiring diagram. The wires and
ground screw are located in the furnace junction box.
NOTES:
■ In downflow applications, the power leads should be routed
through the supplied wire tabs when locating the junction box
to the left side.
■ Low voltage wires may be connected to the terminal strip.
14
IMPORTANT: To avoid possible equipment malfunction, route the
low voltage wires to avoid interference with filter removal or other
maintenance.
WARNING
HIGH VOLTAGE!
To avoid the risk of injury,
electrical60
shock
Goodman
or death, the furnace must be electrically
grounded in accordance with local codes or
in their absence, with the latest edition of the
National Electric Code (NEC).
To ensure proper unit grounding, the ground wire should run from
the furnace ground screw located inside the furnace junction box
all the way back to the electrical panel.
NOTE: Do not use gas piping as an electrical ground.
To confirm proper unit grounding, turn off the electrical power
and perform the following check.
1. Measure the resistance between the neutral (white)
connection and one of the burners.
2. Resistance should measure 10 ohms or less.
This furnace is equipped with a blower door interlock switch
which interrupts the unit voltage when the blower door is opened
for servicing.
NOTE: Do not defeat this switch.
24-Volt Thermostat Wiring
IMPORTANT NOTE
Wire routing must not interfere with circulator blower
operation, filter removal or routine maintenance. A removable
Important Note
plug connector is provided with the control to make
thermostat wire connections. This plug may be removed to
allow wire connections to be made to the plug and then
replaced. It is STRONGLY recommended that multiple wires
into a single terminal be twisted together prior to inserting
into the plug connector. Failure to do so may result in
intermittent operation.
As a 2-stage furnace, the furnace integrated control module
provides terminals for both W1 and W2, and Y1 and Y2
thermostat connections. This allows the furnace to support the
following system applications: 2-stage heating only, 2-stage
heating with single-stage cooling and 2-stage heating with
2-stage cooling. Refer to the following thermostat wiring
diagrams for proper connections to the integrated control
module.
Low voltage connections can be made through either the right or
left side panel. Thermostat wiring entrance holes are located in
the blower compartment. The following illustration shows the
connections for a heat/cool system.
This furnace is equipped with a 40 VA transformer to facilitate use
with most cooling equipment. Consult the wiring diagram located
on the blower compartment door for further details of 115-volt
and 24-volt wiring.
NOTES:
■ For single-stage cooling applications, a jumper may be
required between Y1 and Y2 at the furnace control in order to
achieve the desired single-stage cooling airflow. Consult the
Blower Performance charts to determine if the required
single-stage cooling airflow can be delivered at low stage (Y1
input) or high stage (Y2 input). Additionally, use of ramping
profile and dehumidification features require a jumper
between Y1 and O and Y1 and DEHUM, respectively.
■ Thermostat R required if outdoor unit is equipped with a
Comfort AlertTM module.
Thermostat Wiring Diagram—Single-Stage Thermostat
Application
Thermostat Wiring Diagram—2-Stage Heating with
2-Stage Cooling
NOTE: Place jumper between Y1 and O for proper
dehumidification operation and proper ramping profile operation.
A
W2
Y2
W1
2 Stg Heat 2 Stg Cool v2
Y2
W1
NOTE: Place jumper between Y1 and O for proper
dehumidification operation and proper ramping profile operation.
W2
B
E
NEU
Y2
C
D
A
Y
A. Thermostat—2-stage heating and D. Remote condensing unit
2-stage cooling
(2-stage cooling)
B. Furnace integrated control module E. Thermostat R required if
outdoor unit is equipped with
C. Dehumidistat (optional)
a Comfort Alert™ module.
Single Stg Heat Cool v2
R
R
E
Y
C
B
NEU
C
R
D
A. Thermostat—single-stage heating
and single-stage cooling
B. Furnace integrated control module
C. Dehumidistat (optional)
D. Remote condensing unit
(single-stage cooling)
E. Thermostat R required if
outdoor unit is equipped with
a Comfort Alert™ module.
NOTE: To apply a single-stage heating thermostat, the
thermostat selector switch on the integrated control module must
be set on single-stage.
Thermostat Wiring Diagram—2-Stage Heating with
Single-Stage Cooling
NOTE: Place jumper between Y1 and O for proper
dehumidification operation and proper ramping profile operation.
A
A single-stage thermostat with only 1 heating stage may be used
to control this furnace. The application of a single-stage
thermostat does not offer true thermostat-driven 2-stage
operation, but provides a timed transition from low to high fire.
The furnace will run on low stage for a fixed period of time before
stepping up to high stage to satisfy the thermostat’s call for heat.
The delay period prior to stepping up can be set at either a fixed
5-minute transition time or a load based variable time between
1 and 12 minutes (Auto transition). If the Auto transition mode is
selected, the control averages the cycle times of the previous
3 cycles and uses the average to determine the time to transition
from low stage to high stage.
To use a single-stage thermostat:
1. Turn off power to the furnace.
2. Move the thermostat selection DIP switch to the Off
(single-stage) position.
3. Set the desired transition time by setting the Stage Delay DIP
switch to On for Auto transition, or Off for 5-minute transition
time.
4. Turn on power. Refer to the following illustration.
ON
OFF
Heat OFF Delay
DIP Switches
Y
Therm DIP G 2009
2 Stg Heat Single Cool v2
R
R
B
3
Thermostat
4
Stage Delay
S1
E
NEU
Y
C
R
C
D
A. Thermostat—2-stage heating and
single-stage cooling
B. Furnace integrated control module
C. Dehumidistat (optional)
D. Remote condensing unit
(single-stage cooling)
E. Thermostat R required if
outdoor unit is equipped with
a Comfort Alert™ module.
15
24-Volt Dehumidistat Wiring
The optional usage of a dehumidistat allows the furnace’s
circulator blower to operate at a slightly lower speed (82% of
desired speed) during a combined thermostat call for cooling and
dehumidistat call for dehumidification. This can be done through
an independent dehumidistat or through a thermostat’s DEHUM
terminal (if available). This lower blower speed enhances
dehumidification of the conditioned air as it passes through the
AC coil. For proper function, a dehumidistat applied to this
furnace must operate on 24 VAC and utilize a switch which opens
on humidity rise.
To install/connect a dehumidistat:
1. Turn off power to furnace.
2. Secure the dehumidistat neutral wire (typically the white lead)
to the terminal marked DEHUM on the furnace integrated
control module.
3. Secure the dehumidistat hot wire (typically the black lead) to
the terminal marked R on the furnace integrated control
module.
4. Secure the dehumidistat ground wire (typically the green lead)
to the ground screw on the furnace junction box.
NOTE: Ground wire may not be present on all dehumidistats.
5. Turn on power to furnace.
To enable the dehumidify function on the integrated control
module, set the dehumidification DEHUM DIP switch from Off to
On.
Once the switch is set, the dehumidify function is enabled during
a combination call for cooling (T-Stat) and dehumidification
(DEHUM-Stat).
ON
OFF
9
DEHUM
10
Unused
S5
Fossil Fuel Applications
This furnace can be used in conjunction with a heat pump in a
fossil fuel application. A fossil fuel application refers to a
combined gas furnace and heat pump installation which uses an
outdoor temperature sensor to determine the most cost efficient
means of heating (heat pump or gas furnace).
A heat pump thermostat with 3 stages of heat is required to
properly use a 2-stage furnace in conjunction with a heat pump.
Refer to the fossil fuel kit installation instructions for additional
thermostat requirements.
Strictly follow the wiring guidelines in the fossil fuel kit installation
instructions. All furnace connections must be made to the
furnace 2-stage integrated control module and the FURNACE
terminal strip on the fossil fuel control board.
115-Volt Line Connection of Accessories (Humidifier
and Electronic Air Cleaner)
WARNING
Goodman 115
HIGH VOLTAGE!
To avoid personal injury or death due to
electrical shock, disconnect electrical
power before servicing or changing any
electrical wiring.
The furnace integrated control module is equipped with line
voltage accessory terminals for controlling power to an optional
field-supplied humidifier and/or electronic air cleaner.
The accessory load specifications are as follows:
Humidifier
1.0 Amp maximum at 120 VAC
Electronic Air Cleaner
1.0 Amp maximum at 120 VAC
NOTES:
■ Turn off power to the furnace before installing any
accessories.
■ Follow the humidifier or 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 humidifier and electronic air cleaner hot terminals are
identified as HUM and EAC.
■ The humidifier and electronic air cleaner neutral terminals are
identified as NEUTRAL.
■ All field wiring must conform to applicable codes.
■ Connections should be made as shown in the “Optional
Accessories Wiring” illustration.
Optional Accessories Wiring
15-Circuit Connector
Integrated Control Module
Humidifier
Electronic
Air Cleaner
16
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 humidifier terminals (HUM) are
energized with 115 volts whenever the induced draft blower is
energized. The integrated control module electronic air cleaner
terminals (EAC) are energized with 115 volts whenever the
circulator blower is energized.
24-Volt Humidifier
A 5" (12.7 cm) long brown wire in the wire harness at the low-fire
pressure switch provides 24 VAC humidifier control. This wire is
powered any time the pressure switch is closed. To connect
24 VAC HUM, connect the 24 VAC line of the humidifier to the 5"
(12.7 cm) brown wire. The connection can be made by either
stripping the wire and using a wire connector or by using a
field-supplied quick connect terminal. The wiring must conform
to all local and national codes. Connect the COM side of the
humidifier to the C terminal on the furnace control board (or to
the COM side of the 24 VAC transformer).
NOTE: Do not connect 115-volt humidifier to these terminals.
GAS SUPPLY AND PIPING
The furnace rating plate includes the approved furnace gas input
rating and gas types. The furnace must be equipped to operate
on the type of gas applied. This includes any conversion kits
required for alternate fuels and/or high altitude.
CAUTION
To prevent unreliable
or equipment damage,
Goodmanoperation
61
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 in the Inlet Gas Supply Pressure chart. 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 avoid unreliable ignition. The
maximum must not be exceeded to keep the furnace from
overfiring.
High Altitude Derate
NOTE: The furnace will naturally derate itself with altitude. Do not
attempt to increase the firing rate by changing orifices or
increasing the manifold pressure. This can cause poor
combustion and equipment failure.
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 7,000 ft (2,133.6 m), please refer to your
distributor for the required kit(s).
Manifold
Pressure
Pressure
Gas
Natural
Altitude
Kit
High Low Switch
Orifice Stage Stage Change
None
#43
0 to
7,000 ft
Propane (2,133.6 m) LPM-05* #55
LPM-06*
3.5"
W.C.
1.9"
W.C.
None
10.0"
W.C.
6.0"
W.C.
None
NOTES:
■ LPM-05* supports White-Rodgers 2-stage valve only.
■ LPM-06* supports both Honeywell and White-Rodgers
2-stage volves.
■ In Canada, gas furnaces are only certified to 4,500 ft
(1,371.6 m).
■ 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 ensure safe
and proper furnace operation. All conversions must be
performed by a qualified installer or service agency.
Propane Gas Conversion
WARNING
Possible property damage, personal injury or death may
occur if the correct conversion kits are not installed. The
Goodman
appropriate kits must
be applied52
to ensure safe and proper
furnace operation. All conversions must be performed by
a qualified installer or service agency.
Inlet Gas Supply Pressure
Natural gas
5.0" W.C. minimum; 10.0" W.C. maximum
Propane gas
11.0" W.C. minimum; 13.0" W.C. maximum
NOTE: Adjusting the minimum supply pressure below the limits in
the Inlet Gas Supply Pressure chart could lead to unreliable
ignition. Gas input to the burners must not exceed the rated input
shown on the rating plate. Overfiring of the furnace can result in
premature heat exchanger failure. Gas pressures in excess of
13" W.C. can also cause permanent damage to the gas control
valve.
At all altitudes, the manifold pressure must be within 0.3" W.C. of
that listed in the Specification Sheet applicable to your model for
the fuel used. At all altitudes and with either fuel, the air
temperature rise must be within the range listed on the furnace
nameplate.
Should this appliance be converted to LP gas, refer to the
instructions included in the factory-authorized LP gas conversion
kit.
This furnace is configured for Natural gas. The appropriate
manufacturer’s propane gas conversion kit, must be applied for
propane gas installations. Refer to “Propane Gas and/or High
Altitude Installations” section for details.
Contact your 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 ensure safe and
proper furnace operation. All conversions must be performed by
a qualified installer or service agency.
17
Gas Piping Connections
■
CAUTION
To avoid possible unsatisfactory operation or equipment
damage due to underfiring of equipment, use the proper
size of Natural/propane
gas piping
Goodman
62needed 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
the 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—Cu ft of Gas Per Hour
(CFH)
■
Length of
Pipe—
ft (m)
Nominal Black Pipe Size
¹⁄₂ "
³⁄₄ "
1"
1¹⁄₄ "
1¹⁄₂ "
■
10 (3)
132
278
520
1,050
1,600
■
20 (6.1)
92
190
350
730
1,100
30 (9.2)
73
152
285
590
980
40 (12.2)
63
130
245
500
760
50 (15.2)
56
115
215
440
670
60 (18.3)
50
105
195
400
610
70 (21.3)
46
96
180
370
560
80 (24.4)
43
90
170
350
530
90 (27.4)
40
84
160
320
490
100 (30.5)
38
79
150
305
460
Pressure 0.5 psig or less and pressure drop of 0.3" W.C.; based
on 0.60 specific gravity gas
Btu/h Furnace Input
CFH =
General Furnace Layout
A
B
C
Furnace Layout
G 2009
D
‘‘
Heating Value of Gas (Btu/cu ft)
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 the gas control valve. In some
cases, the installer may also need to supply a transition piece
from ¹⁄₂" (1.3 cm) pipe to a larger pipe size.
The following stipulations apply when connecting gas piping.
■ Use black iron or steel pipe and fittings for building piping.
■ Use pipe joint compound (pipe dope) on male threads only.
■ Always use pipe joint compound (pipe dope) that is approved
for all gases.
NOTE: Do not apply compound to the first 2 threads.
■ Use ground joint unions.
■ Install a drip leg to trap dirt and moisture before it can enter
the gas control valve.
NOTE: The drip leg must be a minimum of 3" (7.6 cm) long.
■ Install a ¹⁄₈" NPT pipe plug fitting, accessible for test gage
connection, immediately upstream of the gas supply
connection to the furnace.
18
■
Use 2 pipe wrenches when making the connection to the gas
control valve to keep it from turning.
NOTE: The orientation of the gas control valve on the
manifold must be maintained as shipped from the factory.
Install a manual shutoff valve between the gas meter and the
furnace within 6 ft (1.8 m) of the furnace.
If a union is installed, the union must be downstream of the
manual shutoff valve, between the shutoff valve and the
furnace.
Tighten all joints securely.
Connect the furnace to the building piping by one of the
following methods:
1. Rigid metallic pipe and fittings.
2. Semirigid metallic tubing and metallic fittings.
NOTE: Aluminum alloy tubing must not be used in exterior
locations.
Use UL Listed/CSA approved gas appliance connectors in
accordance with their instructions.
Gas connectors must be fully in the same room as the
furnace.
Protect gas connectors and semirigid tubing against physical
and thermal damage when installed.
Ensure that aluminum alloy tubing and connectors are coated
to protect against external corrosion when in contact with
masonry, plaster, insulation or subjected to repeated wetting
by liquids such as water (except rain water), detergents or
sewage.
E
A. Manual shutoff valve location
D. Drip leg
(upstream of ground joint pipe union) E. Reducing coupling—¹⁄₂" x¹⁄₈"
B. Height required by local codes
with ¹⁄₈" pipe plug to
measure line gas pressure
C. Ground joint pipe union (upstream of
gas control valve)
Upflow Installations
When the gas piping enters through the right side of the furnace,
the installer must supply the following fittings (starting from the
gas control valve):
■ 90º elbows (2)
■ Close nipple
■ Straight pipe to reach the exterior of the furnace
■ Ground joint union
Drip leg
Manual shutoff valve
■ Transition piece from ¹⁄₂" to another pipe size, if needed
When the gas piping enters through the left side of the furnace,
the installer must supply the following fittings (starting from the
gas control valve):
■ Straight pipe to reach the exterior of the furnace
■ Ground joint union
■ Drip leg
■ Manual shutoff valve
■ Transition piece from ¹⁄₂" to another pipe size, if needed
■
Propane Gas Tanks and Piping
■
Counterflow Installations
When the gas piping enters through the left side of the furnace,
the installer must supply the following fittings (starting from the
gas control valve):
■ Straight pipe to reach the exterior of the furnace
■ Ground joint union
■ Drip leg
■ Manual shutoff valve
■ Transition piece from ¹⁄₂" to another pipe size, if needed
When the gas piping enters through the right side of the furnace,
the installer must supply the following fittings (starting from the
gas control valve):
■ 90º elbows (2)
■ Close nipple
■ Straight pipe to reach the exterior of the furnace
Gas Piping Checks
Before placing the furnace in operation, leak test the furnace and
gas connections.
WARNING
Goodman 63
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.
WARNING
72 injury due to
To prevent property Goodman
damage or personal
fire, the following instructions must be performed
regarding gas connections, pressure testing, location
of shutoff valve and installation of gas piping.
WARNING
If the gas furnace is installed in a basement, and
Goodman
excavated area or a confined space,
it is 64
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 can
settle in low areas or confined spaces.
— Propane gas odorant may fade, making the gas
undetectable except 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.
NOTE: If a gas odor is detected, follow the instructions in “Gas
Furnace Safety Precautions” in this manual.
All propane gas equipment must conform to the safety standards
of the National Board of Fire Underwriters, NBFU Manual 58.
For satisfactory operation, propane gas pressure must be
10.0" W.C. at the furnace manifold with all gas appliances in
operation.
Maintaining proper gas pressure depends on 3 main factors:
■ Vaporization rate, depending on temperature of the liquid and
“wetted surface” area of the container or containers.
■ Proper pressure regulation. 2-stage regulation is
recommended for both cost and efficiency.
■ Pressure drop in the lines between the regulators, and
between 2nd stage regulator and the appliance. Pipe size will
depend on the length of the pipe run and the 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 “Propane Gas Installation—Typical” for typical propane
gas installations and piping.
Propane Gas Installation—Typical
A
B
D
NOTES:
■ Never exceed specified pressures for testing. Higher pressure
may damage the gas control valve and cause subsequent
overfiring, resulting in heat exchanger failure.
■ Disconnect this unit and external manual 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
the external manual shutoff valve before pressure testing
supply piping system with test pressures equal to or less than
¹⁄₂ psig (3.48 kPa).
E
C
A. 1st stage regulator
B. 5 to 15 psig (20 psig maximum)
C. 200 psig maximum
D. 2nd stage regulator
E. Continuous 11.0" W.C.
19
Sizing Between 1st and 2nd Stage Regulator*
Maximum propane capacities listed are based on 2 psig pressure drop at 10 psig setting. Capacities in 1,000 Btu/h.
Propane Gas Piping Chart I
Tubing Size, O.D. Type L
Nominal Pipe Size Schedule 40
Pipe or Tubing Length—ft (m) ³⁄₈"
¹⁄₂"
⁵⁄₈"
³⁄₄"
⁷⁄₈"
¹⁄₂"
³⁄₄"
10 (3)
730
1,700
3,200
5,300
8,300
3,200
7,500
20 (6.1)
500
1,100
2,200
3,700
5,800
2,200
4,200
30 (9.2)
400
920
2,000
2,900
4,700
1,800
4,000
40 (12.2)
370
850
1,700
2,700
4,100
1,600
3,700
50 (15.2)
330
770
1,500
2,400
3,700
1,500
3,400
60 (18.3)
300
700
1,300
2,200
3,300
1,300
3,100
80 (24.4)
260
610
1,200
1,900
2,900
1,200
2,600
100 (30.5)
220
540
1,000
1,700
2,600
1,000
2,300
125 (38.1)
200
490
900
1,400
2,300
900
2,100
150 (45.7)
190
430
830
1,300
2,100
830
1,900
175 (53.3)
170
400
780
1,200
1,900
770
1,700
200 (61)
160
380
730
1,100
1,800
720
1,500
To convert to capacities at 15 psig settings—multiply by 1.13. To convert to capacities at 5 psig settings—multiply by 0.879.
Sizing Between 2nd Stage and Appliance Regulator*
Maximum Propane Capacities Listed are Based on 2 psig pressure drop at 10.0" W.C. setting. Capacities in 1,000 Btu/h.
Propane Gas Piping Chart II
Tubing Size, O.D. Type L
Nominal Pipe Size Schedule 40
Pipe or Tubing Length—ft (m) ³⁄₈"
¹⁄₂"
⁵⁄₈"
³⁄₄"
⁷⁄₈"
1¹⁄₈"
¹⁄₂"
³⁄₄"
1"
1¹⁄₄"
1¹⁄₂"
10 (3)
39
92
199
329
501
935
275
567
1,071
2,205
3,307
20 (6.1)
26
62
131
216
346
630
189
393
732
1,496
2,299
30 (9.2)
21
50
107
181
277
500
152
315
590
1,212
1,858
40 (12.2)
19
41
90
145
233
427
129
267
504
1,039
1,559
50 (15.2)
18
37
79
131
198
376
114
237
448
913
1,417
60 (18.3)
16
35
72
121
187
340
103
217
409
834
1,275
80 (24.4)
13
29
62
104
155
289
89
185
346
724
1,066
100 (30.5)
11
26
55
90
138
255
78
162
307
630
976
125 (38.1)
10
24
48
81
122
224
69
146
275
567
866
150 (45.7)
9
21
43
72
109
202
63
132
252
511
787
200 (61)
8
19
39
66
100
187
54
112
209
439
665
250 (76.2)
8
17
36
60
93
172
48
100
185
390
590
Data in accordance with NFPA pamphlet Number 54.
20
CIRCULATING AIR AND FILTERS
Ductwork—Airflow
WARNING
Goodman
68of combustion, including carbon
Never allow the
products
monoxide, to enter the return ductwork 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.
■ For installations requiring more than 1,800 CFM, use either
2 side returns or bottom return.
■ Flexible joints may be used for supply and return connections
to reduce noise transmission.
■ To prevent the blower from interfering with combustion air or
draft when a central return is used, a connecting duct must
be installed between the unit and the utility room wall.
■ Never use a room, closet or alcove as a return air chamber.
■ The furnace is shipped with the top flanges in the flat
position. Before installing a coil or ducts, the flanges must be
bent 90 degrees.
When the furnace is installed 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 unit, 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.
NOTE: In a horizontal installation, the air conditioning coil must
be adequately supported by proper brackets and supports.
Inadequate coil support can result in furnace cabinet distortion
and air leakage.
■
When the furnace is heating, the temperature of the return air
entering the furnace must be between 55°F and 100°F (13ºC and
38ºC).
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 a duct sealed
to the furnace casing and terminating outside the space
containing the furnace.
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 are 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.
NOTE: An undersized opening will cause reduced airflow. The
bottom return is set up as a knockout.
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, in a side panel external filter
rack kit (upflows) or in the ductwork above a downflow furnace.
As an alternative, a media air filter or electronic air cleaner can be
used as the primary filter.
Circulation Air Filters
One of the most common causes of a problem in a forced air
heating system is a blocked or dirty filter. Circulating air filters
must be inspected monthly for dirt accumulation and replaced if
necessary. Failure to maintain clean filters can cause premature
heat exchanger failure.
A new home may require more frequent replacement until all
construction dust and dirt is removed. Circulating air filters are to
be installed in the return air duct external to the furnace cabinet.
Minimum Filter Sizes for Disposable Filters—Disposable
Nominal 300 F.M. Face Velocity
Furnace Input
Filter Size (sq. in.)
70M
768
90M
960
115M
1,022
Horizontal Installations
Filters must be installed in either the central return register or in
the return air ductwork.
21
START-UP PROCEDURE AND ADJUSTMENT
This furnace must have a 115 VAC power supply properly
connected and grounded. Proper polarity must be maintained for
correct operation. In addition to the following start-up and
adjustment items, refer to further information in “Operational
Checks.”
2. Remove the burner compartment door and move the furnace
gas control valve manual control to the Off position.
3. Close the manual gas shutoff valve external to the furnace.
4. Replace the burner compartment door.
Heat Anticipator Setting
Gas Supply Pressure Measurement
The heat anticipator in the room thermostat must be correctly
adjusted to obtain the proper number of cycles per hour and to
avoid “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.
Furnace Operation
1. Purge the gas lines of air prior to start-up.
NOTE: Be sure not purge lines into an enclosed burner
compartment.
2. Check for leaks using an approved chloride-free soap and
water solution, an electronic combustible gas detector or
other approved method.
3. Verify that all required kits (propane gas, high altitude, etc.)
have been appropriately installed.
CAUTION
Goodman 61
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.
The line pressure supplied to the gas control valve must be within
the range specified below. The supply pressure can be measured
at the gas control valve inlet pressure boss 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.
Gas Control Valve—White-Rodgers 2-Stage 36G54
Furnace Start-Up
1. Close the manual gas shutoff valve external to the furnace.
2. Turn off the electrical power to the furnace.
3. Set the room thermostat to the lowest possible setting.
4. Remove the burner compartment door.
NOTE: This furnace is equipped with an ignition device which
automatically lights the burner. Do not try to light the burner by
hand.
5. Move the furnace gas control valve manual control to the Off
position.
6. Wait 5 minutes, and then check for a gas odor.
NOTE: Check near the floor since some types of gas are
heavier than air.
7. If a gas odor is detected, follow the instructions in “Gas
Furnace Safety Precautions” in this manual.
8. If no gas odor is detected, move the furnace gas control valve
manual control to the On position.
9. Replace the burner compartment door.
10. Open the manual gas shutoff valve external to the furnace.
11. Turn on the electrical power to the furnace.
12. Adjust the thermostat to a setting above room temperature.
13. After the burners are lit, set the thermostat to the desired
temperature.
A
B
C
A. Inlet
B. Outlet
C. On/Off selector switch
Gas Control Valve—White-Rodgers 36G54 Connected to
Manometer
B
A
C
D
E
F
K
Furnace Shutdown
1. Set the thermostat to the lowest setting.
The integrated control will close the gas control valve and
extinguish the flame. Following a 15-second delay, the
induced draft blower will be de-energized. After a 120-, 150-,
180- or 210-second delay period (field-selectable delay Off
[90, 120, 150, 180] plus a 30-second ramp down), the
circulator blower de-energizes.
22
L
A. Open to atmosphere
B. Manometer hose
C. Outlet pressure boss
D. High-fire regulator adjust
E. Regulator vent
F. Low-fire regulator adjust
J
I HG
G. Coaxial coil terminal (M)
H. Common terminal (C)
I. High-fire coil terminal (HI)
J. On/Off selector switch
K. Inlet pressure boss
L. Manometer
Gas Control Valve—Honeywell 2-Stage VR9205
A
5. Measure the furnace gas supply pressure with burners firing.
NOTE: Supply pressure must be within the range specified in the
Inlet Gas Supply Pressure chart.
B
Inlet Gas Supply Pressure
F
C
D
E
A. Regulator vent
B. High-fire regulator adjust
C. Outlet
D. Low-fire regulator adjust
E. On/Off selector switch
F. Inlet
Gas Control Valve—Honeywell VR9205 Connected to
Manometer
C
B
A
Natural Gas
Minimum: 5.0" W.C. Maximum: 10.0" W.C.
Propane Gas
Minimum: 11.0" W.C. Maximum: 13.0" W.C.
If the supply pressure differs from chart, make the necessary
adjustments to the pressure regulator, gas piping size, etc., and/
or consult with local gas utility.
6. Turn off the gas supply to the furnace at the manual shutoff
valve.
7. Disconnect the manometer.
8. Reinstall plug before turning on gas supply to furnace.
9. Turn off any unnecessary gas appliances that were turned on
in Step 4.
Measuring Inlet Gas Pressure—Alternate Method
D
A
E
B
C
i
D
F
G
H
F
E
G
A. Open to atmosphere
B. Manometer hose
C. Common terminal (C)
D. High-fire coil terminal (HI)
E. Low-fire coil terminal (LO)
F. ¹⁄₈" NPT inlet pressure tap
G. ¹⁄₈" NPT outlet pressure tap
H. Manometer
1. Turn off the gas supply to the furnace at the manual gas
shutoff valve external to the furnace.
2. Disconnect all electrical power to the system.
3. Connect a calibrated water manometer (or appropriate gas
pressure gauge) at either the gas control valve inlet pressure
boss or the gas piping drip leg. See “Gas Control Valve—
Honeywell VR9205 Connected to Manometer” or “Gas
Control Valve—White-Rodgers 36G54 Connected to
Manometer” illustration for location of inlet pressure boss/
tap.
NOTE: If you are measuring the gas pressure at the drip leg or on
the Honeywell VR9205 gas control valve, a field-supplied hose
barb fitting must be installed prior to making the hose
connection. If using the inlet pressure boss on the White-Rodgers
36G54 gas control valve, then use the 36G Valve Pressure Check
Kit, Part Number 0151K00000S.
4. Turn on the gas supply and operate the furnace and all other
gas consuming appliances on the same gas supply line.
A. Gas supply line
B. Gas shutoff valve
C. Gas supply line to furnace
D. Open to atmosphere
E. Manometer
F. Manometer hose
G. Dripleg cap with fitting
Gas Manifold Pressure Measurement and
Adjustment
CAUTION
To prevent unreliable
operation
Goodman
65 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 control valve pressure regulator.
Only small variations in gas pressure should be made by
adjusting the gas control 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 the gas supply to furnace at the manual gas shutoff
valve external to the furnace.
2. Turn off all electrical power to the system.
23
3. Outlet pressure tap connections:
■ Honeywell VR9205 valve: Remove the outlet pressure
boss plug. Install an ¹⁄₈" NPT hose barb fitting into the
outlet pressure tap.
■
White-Rodgers 36G54 valve: Back outlet pressure test
screw (inlet/outlet pressure boss) 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 boss
(White-Rodgers valve).
5. Turn on the gas supply.
6. Turn on power and close thermostat R and W1 contacts to
provide a call for low-stage heat.
7. Measure the gas manifold pressure with burners firing.
8. Adjust manifold pressure using the Manifold Gas Pressure
chart shown below.
9. Remove the regulator cover screw from the low (LO) outlet
pressure regulator adjust tower.
10. Turn the screw clockwise to increase pressure or
counterclockwise to decrease pressure.
11. Replace regulator cover screw.
12. Close thermostat R and W2 contacts to provide a call for
high-stage heat.
13. Remove the regulator cover screw from the high (HI) outlet
pressure regulator adjust tower.
14. Turn the screw clockwise to increase pressure or
counterclockwise to decrease pressure.
15. Replace the regulator cover screw.
16. Turn off all electrical power and gas supply to the system.
17. Remove the manometer hose from the hose barb fitting or
outlet pressure boss.
18. Replace the outlet pressure tap:
■ Honeywell VR9205 valve: Remove the ¹⁄₈" NPT hose barb
fitting from the outlet pressure tap. Replace the outlet
pressure boss plug and seal with a high quality thread
sealer.
■
White-Rodgers 36G54 valve: Turn the outlet pressure test
screw in to seal pressure port (clockwise, 7 in.-lb
minimum).
19. Turn on electrical power and gas supply to the system.
20. Close the thermostat contacts R and W1/W2 to energize the
valve.
21. Using a leak detection solution or soap suds, check for leaks
at the outlet pressure boss plug (Honeywell valve) or screw
(White-Rodgers valve). Bubbles forming indicate a leak.
IMPORTANT: If a leak is detected, turn off gas immediately
and repair all leaks.
NOTE: For gas-to-gas conversion, consult your dealer for
appropriate conversion.
Manifold Gas Pressure
Gas
Natural
Propane
24
Range
Nominal
Low Stage
1.6" to 2.2" W.C.
1.9" W.C.
High Stage
3.2" to 3.8" W.C.
3.5" W.C.
Low Stage
5.7" to 6.3" W.C.
6.0" W.C.
High Stage
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 1 cubic foot
dial, divide the number of seconds recorded in Step 2 by 1. If
the dial is a 2 cubic foot dial, divide the number of seconds
recorded in Step 2 by 2.
4. Calculate the furnace input in Btu per hour (Btu/h). Input
equals the sum of the installation’s gas heating value and 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/ft3
(Obtained from gas supplier)
Installation’s seconds per cubic foot: 34 sec/ft3
Conversion Factor (hours to seconds): 3,600 sec/h
Input = (Htg. value x 3,600) ÷ seconds per cubic foot
Input = (1,000 Btu/ft3 x 3,600 sec/h) ÷ 34 sec/ft3
Input = 106,000 Btu/h
Minor changes to the input rate may be accomplished through
manifold pressure adjustments at the gas control valve. Refer to
“Gas Manifold Pressure Measurement and Adjustment” section
for details.
NOTE: The final manifold pressure cannot vary by more than ±
0.3" W.C. from the specified setting. Consult your local gas
supplier if additional input rate adjustment is required.
5. Repeat steps 2 through 4 on high stage.
6. Turn on the gas supply to all other appliances turned off in
Step 1.
7. Ensure that all appliances are functioning properly and that all
pilot burners are lit and 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
10 minutes.
2. Ensure that all registers are open and all duct dampers are in
their final (fully or partially open) position.
3. Place thermometers in the return and supply ducts as close
to the furnace as possible. Thermometers must not be
influenced by radiant heat from the heat exchanger.
Temperature Rise Measurement
Rise = Supply air temperature - Return air temperature
A
B
C
D
E
A. Heat exchanger radiation C. Supply air temperature
“line of sight”
D. Return air temperature
B. Supply air
E. Return air
4. Subtract the return air temperature from the supply air
temperature to determine the air temperature rise. Allow
adequate time for thermometer readings to stabilize.
5. Adjust the temperature rise by adjusting the circulator blower
speed. Increase blower speed to reduce temperature rise.
Decrease blower speed to increase temperature rise. Refer to
“Circulator Blower Speeds” for speed changing details.
2. Determine the proper airflow for the cooling system. Most
cooling systems are designed to work with airflows between
350 and 450 CFM per ton. Most manufacturers recommend
an airflow of about 400 CFM per ton.
Example: 2.5 tons X 400 CFM per ton = 1,000 CFM
NOTE: The cooling system manufacturer’s instructions must be
checked for required airflow. Any electronic air cleaners or other
devices may require specific airflows, consult installation
instructions of those devices for requirements.
3. Knowing the furnace model, locate the high-stage cooling
airflow charts in the Specification Sheet applicable to your
model. Look up the cooling airflow determined in Step 2 and
find the required cooling speed and adjustment setting.
Example: A WGFM28070V4BX furnace installed with a
2.5 ton air conditioning system. The airflow needed is
1,000 CFM. Looking at the cooling speed chart for
WGFM28070V4BX, find the airflow closest to 1,000 CFM. A
cooling airflow of 990 CFM can be attained by setting the
cooling speed to C and the adjustment to “-” (minus).
4. Continuous fan speed is 30% of the furnace’s maximum
airflow capability.
Example: If the furnace’s maximum airflow capability is
2,000 CFM, the continuous fan speed will be
0.30 x 2,000 CFM = 600 CFM.
5. Locate the blower speed selection DIP switches on the
integrated control module. Select the desired cooling speed
tap by positioning DIP switches 1 and 2 appropriately.
Select the desired adjust tap by positioning DIP switches
3 and 4 appropriately. Refer to the following charts for DIP
switch positions and their corresponding taps. Verify CFM by
noting the number displayed on the dual 7-segment LED
display.
Circulator Blower Speeds
WARNING
Goodman 117
To avoid personal injury or death due to electrical shock,
turn OFF power to the furnace before changing speed taps.
This furnace is equipped with a multispeed 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 heating blower speed is
shipped set at B, and the cooling blower speed is set at D. 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.
Use the dual 7-segment LED display adjacent to the DIP
switches to obtain the approximate airflow quantity. The airflow
quantity is displayed as a number on the display, rounded to the
nearest 100 CFM. The display alternates airflow delivery
indication and the operating mode indication.
Example: The airflow being delivered is 1,225 CFM. The
display indicates 12. If the airflow being delivered is 1,275,
the display indicates 13.
1. Determine the tonnage of the cooling system installed with
the furnace. If the cooling capacity is in Btu/h, divide it by
12,000 to convert capacity to Tons.
Example: Cooling Capacity of 30,000 Btu/h
30,000/12,000 = 2.5 Tons
Speed Selection DIP Switches
Cool
Selection
Switches
Adjust
Selection
Switches
Profile
Selection
Switches
Heat
Selection
Switches
Tap
1
2
3
4
5
6
7
8
A
Off
Off
Off
Off
Off
Off
Off
Off
B
On
Off
On
Off
On
Off
On
Off
C
Off
On
Off
On
Off
On
Off
On
D
On
On
On
On
On
On
On
On
Switch Bank: S3
DIP Switch Number
Cooling Tap
1
2
A
Off
Off
B
On
Off
C
Off
On
D*
On
On
*Indicates factory setting
25
Speed Taps—Adjust
Provides a 1-minute Off delay at 100% of the cooling
demand airflow.
■
Switch Bank: S3
DIP Switch Number
Adjust Tap
3
4
Normal*
Off
Off
+10% Adjust
On
Off
-10% Adjust
Off
On
Normal
On
On
Profile D
■
■
The multispeed circulator blower also offers several custom On/
Off ramping profiles. These profiles may be used to enhance the
cooling performance and increase the comfort level. The ramping
profiles are selected using DIP switches 5 and 6. See the “Profile”
illustrations for DIP switch positions and their corresponding
taps. Verify CFM by noting the number displayed on the dual 7segment LED display.
DIP Switch
Number
5
6
A*
Off
Off
B
On
Off
C
Off
On
D
On
On
*Indicates factory setting
Provides a 1-minute Off delay at 100% of the cooling
demand airflow.
100% CFM
1 min
Profile B
100% CFM
100% CFM
50% CFM
1 min
Cooling Demand
Profile C
■
Cooling Demand
6. Select the heating speed from the heating speed chart in the
Specification Sheet for your model. The Adjust Taps setting
(already established by the cooling speed selection)
determines which set of speeds are available. The selected
speed must provide a temperature rise within the rise range
listed with the particular model.
Example: The WGFM290508V4C is set for 990 CFM on
cooling, the “ADJUST” is set to “+” (plus). The 4 heating
speeds available are “A Plus,” “B Plus,” “C Plus” and “D
Plus.” “A Plus” has a rise of 38°F for both stages which is
within the 20ºF to 50°F rise range for the WGFM290508V4C.
This setting will keep electrical consumption to a minimum.
Set the “Heat” speed DIP switches to “A.”
Heating Tap
7
8
A
Off
Off
B*
On
Off
C
Off
On
D
On
On
Ramps up to 85% of the full cooling demand airflow for
approximately 7¹⁄₂ minutes.
The motor then ramps to 100% of the required airflow.
Off
7. Select the desired heating speed tap by positioning DIP
switches 7 and 8 appropriately. Verify CFM by noting the
number displayed on the dual 7-segment LED display.
In general, lower heating speeds will reduce electrical
consumption, lower operating sound levels of the blower and
increase the outlet air temperature delivered to the home. The
speeds available allow the blower performance to be optimized
for the particular homeowner’s needs.
Profiles
Pre-Run
Short-Run
Off -Delay
A
-
-
60 sec/100
B*
-
30 sec/50
60 sec/100
C
-
7.5 min/85
60 sec/100
D
30 sec/50
7.5 min/85
30 sec/50
*Indicates factory setting
26
Off
30 sec
7¹⁄₂ min
*Indicates factory setting
Ramps up to 50% of the full cooling demand airflow for
30 seconds.
The motor then ramps to 100% of the required airflow.
Provides a 1-minute Off delay at 100% of the cooling
demand airflow.
¹⁄₂ min
■
30 sec
50% CFM
100% CFM
DIP Switch Number
Off
Cooling
Demand
Off
85% CFM
100% CFM
Off
■
50% CFM
Off
Switch Bank: S4
Profile A
■
Ramps up to 50% of the full cooling demand airflow for
30 seconds.
Then ramps to 85% of the full cooling demand airflow for
approximately 7¹⁄₂ minutes.
The motor then ramps to 100% of the required airflow.
Provides a 30-second Off delay at 50% of the cooling
demand airflow.
■
■
Ramping Profile Tap
Off
1 min
Cooling Demand
Comfort Mode Profiles
■
100% CFM
100% CFM
7¹⁄₂ min
*Indicates factory setting
■
85% CFM
Off
To Set Airflow
Blower Heat Off Delay Timings
1.
2.
3.
4.
5.
6.
7.
Select the model and desired high-stage cooling airflow.
Determine the corresponding tap (A, B, C, or D).
Set DIP switches 1 and 2 to the appropriate On/Off positions.
Select the model and desired high-stage heating airflow.
Determine the corresponding tap (A, B, C, or D).
Set DIP switches 7 and 8 to the appropriate On/Off positions.
Select the airflow adjustment factor taps (A and D are 1; Tap
B is +10; Tap C -10).
8. Set DIP switches 3 and 4 to the appropriate On/Off positions.
To Set Comfort Mode
1. Select desired comfort mode profile. See Comfort Mode
Profile chart.
2. Set DIP switches 5 and 6 to the appropriate On/Off positions.
The integrated control module provides a selectable heat-off
delay function. The heat off delay period may be set to 90, 120,
150 or 180 seconds using the DIP switches or jumper provided
on the control module. The delay is factory-shipped at
150 seconds, but may be changed to suit the installation
requirements and/or homeowner preference. Refer to the
following chart for DIP switch positions and corresponding delay
times.
Switch Bank: S1
DIP Switch Number
Heat-Off Delay
1
2
90 seconds
Off
Off
120 seconds
On
Off
150 seconds*
Off
On
180 seconds
On
On
Model
Tap
Low- High- Low- HighStage Stage Stage Stage
Cool Cool Heat Heat
WGFD28070V3BX
A
390
600
735
1,050
B
520
800
805
1,150
C
650
1,000 875
1,250
D
780
1,200 935
1,350
A
520
800
1,350
B
715
1,100 1,015 1,450
C
910
1,400 1,085 1,550
D
1,170 1,800 1,155 1,650
A
553
850
B
748
1,150 1,155 1,650
C
943
1,450 1,225 1,750
D
1,203 1,850 1,260 1,800
A
390
600
875
1,250
Heating Mode
B
520
800
945
1,350
C
715
1,100 1,015 1,450
D
910
1,400 1,085 1,550
A
520
800
B
715
1,100 1,120 1,600
C
910
1,400 1,190 1,700
D
1,170 1,800 1,260 1,800
A
520
800
B
715
1,100 1,225 1,750
C
910
1,400 1,245 1,775
The normal operational sequence in heating mode is as follows:
■ R and W1 (or R and W1/W2) thermostat contacts close,
initiating a call for heat.
■ Integrated control module performs safety circuit checks.
■ Induced draft blower is energized on high speed for a
15-second prepurge. Humidifier terminal is energized with
induced draft blower.
■ Induced draft blower steps to low speed following prepurge.
Low-stage pressure switch contacts are closed.
■ Igniter warm-up begins upon step to low speed and presence
of closed low-stage pressure switch contacts.
■ Gas control valve opens at the end of the igniter warm-up
period, delivering gas to the burners and establishing a flame.
■ Integrated control module monitors flame presence. Gas
control valve will remain open only if flame is detected.
D
1,170 1,800 1,260 1,800
WGFD28090V5CX
WGFD28115V5CX
WGFM28070V4BX
WGFM28090V5CX
WGFM28115V5CX
945
1,085 1,550
1,050 1,500
1,210 1,725
*Indicates factory setting
NORMAL SEQUENCE OF
OPERATION
Power Up
The normal power up sequence is as follows:
■ 115 VAC power applied to furnace.
■ Integrated control module performs internal checks.
■ Integrated control module displays “88” on the dual
7-segment LED display.
■ Integrated control module monitors safety circuits
continuously.
■ Furnace awaits call from thermostat. Displays “OP” on the
dual 7-segment LED display.
27
■
■
■
■
■
■
■
■
■
■
■
■
■
If the thermostat call is for low heat, the gas control valve and
induced draft blower will continue on low stage. If the call is
for high heat, the gas control valve and induced draft blower
will change to high stage.
Circulator blower is energized on heat speed following a fixed
30-second blower-on delay. The circulator blower requires
30 seconds to ramp up to full speed. Electronic air cleaner
terminal is energized with circulator blower.
Furnace is now operating on the specified stage called for by
the 2-stage thermostat.
Furnace runs, integrated control module monitors safety
circuits continuously.
If the 2-stage thermostat changes the call from low heat to
high heat, the integrated control module will immediately
switch the induced draft blower, gas control valve and
circulator blower to their high-stage settings.
If the 2-stage thermostat changes the call from high heat to
low heat, the integrated control module will immediately
switch the induced draft blower and gas control valve to their
low-stage settings. The circulator blower will remain on
high-heating speed for 30 seconds before switching to the
low-heat circulating speed.
R and W1 (or R and W1/W2) thermostat contacts open,
completing the call for heat.
Gas control valve closes, extinguishing flame.
Induced draft blower is de-energized following a 15-second
post purge. Humidifier terminal is de-energized.
Circulator blower continues running for the selected heat-off
delay period (90, 120, 150 or 180 seconds). The speed run
during this period depends on the last heat call provided by
the thermostat. If the last call for heat was a call for low heat,
the air circulator motor will run on low heat speed for the
duration of the heat-off delay period (90, 120, 150 or
180 seconds). If the last call for heat was a call for high heat,
the air circulating motor will run on the high heating speed for
30 seconds and then switch to the low-heating speed for the
balance of the heat-off delay period (60, 90, 120 or
150 seconds).
Circulator blower and electronic air cleaner terminals are deenergized.
Circulator blower ramps down to Off during the 30 seconds
following the heat-off delay period.
Furnace awaits next call from thermostat.
Cooling Mode
The normal operational sequence in cooling mode is as follows:
■ R and Y1/G or Y2/G thermostat contacts close, initiating a
call for cool.
■ Integrated control module performs safety circuit checks.
■ Outdoor fan and compressor are energized to their
appropriate speeds.
■ Circulator blower is energized on the appropriate cool speed
at the level and time determined by the selected ramping
profile. Electronic air cleaner terminals are energized with
circulator blower.
■ Furnace circulator blower and outdoor cooling unit run their
appropriate speed; Integrated control module monitors safety
circuits continuously.
■ R and Y1/G or Y2/G thermostat contacts open, completing
the call for cool.
■ Outdoor fan and compressor are de-energized.
■ Circulator blower continues running during a cool-off delay
period. The Off delay time and airflow level are determined by
the selected ramping profile.
28
■
■
Electronic air cleaner terminal and circulator blower are
de-energized.
Furnace awaits next call from thermostat.
Fan Only Mode
The normal operational sequence in fan only mode is as follows:
■ R and G thermostat contacts close, initiating a call for fan.
■ Integrated control module performs safety circuit checks.
■ Circulator blower is energized on continuous fan speed (30%
of the furnace’s maximum airflow capability) following a
5-second delay. Electronic air cleaner terminal is energized.
■ Circulator blower runs; integrated control module monitors
safety circuits continuously.
■ R and G thermostat contacts open, completing the call for
fan.
■ Electronic air cleaner terminal and circulator blower are
de-energized.
■ Furnace awaits next call from thermostat.
Operational Checks
Burner Flame
The burner flames should be inspected with the burner
compartment door installed. Flames should be stable, soft and
blue (dust may cause orange tips but must not be yellow). The
flames must extend directly outward from the burner without
curling, floating or lifting off. Flames must not impinge on the
sides of the heat exchanger firing tubes.
Burner Flame
Check the burner flames for good adjustment, a stable, soft and
blue flame that is not curling, floating or lifting off.
SAFETY CIRCUIT DESCRIPTION
General
A number of circuits are employed to ensure proper furnace
operation. These circuits serve to control any potential safety
hazards and serve as inputs in the monitoring and diagnosis of
abnormal function. These circuits are continuously monitored
during furnace operation by the integrated control module.
Integrated Control Module
The integrated control module is an electronic device which, if a
potential safety concern is detected, will take the necessary
precautions and provide diagnostic information through an LED.
■
Primary Limit Control
The primary limit control is located on the partition panel and
monitors heat exchanger compartment temperatures. It is a
normally closed (electrically), automatic reset, temperatureactivated sensor. The limit guards against overheating as a result
of insufficient conditioned air passing over the heat exchanger.
■
■
■
Auxiliary Limit Controls
The auxiliary limit controls are located on or near the circulator
blower and monitors blower compartment temperatures. They
are normally-closed (electrically), auto-reset sensors. These limits
guard against overheating as a result of insufficient conditioned
air passing over the heat exchanger.
■
■
Flue pipe system. Check for blockage and/or leakage. Check
the outside termination and the connections at and internal to
the furnace.
Heat exchanger. Check for corrosion and/or buildup within
the heat exchanger passageways.
Burners. Check for proper ignition, burner flame and flame
sense.
Drainage system. Check for blockage and/or leakage. Check
hose connections at and internal to furnace.
Wiring. Check electrical connections for tightness and/or
corrosion. Check wires for damage.
Filters
Filters
Rollout Limit Controls
The rollout limit controls are mounted on the burner/manifold
assembly and monitor the burner flame. They are normallyclosed (electrically), manual-reset sensors. These limits guard
against burner flames not being properly drawn into the heat
exchanger.
Pressure Switches
The pressure switches are normally-open (closed during
operation), negative air pressure-activated switches. They
monitor the airflow (combustion air and flue products) through
the heat exchanger via pressure taps located on the induced
draft blower and the coil front cover. These switches guard
against insufficient airflow (combustion air and flue products)
through the heat exchanger and/or blocked condensate drain
conditions.
Flame Sensor
The flame sensor is a probe mounted on the burner/manifold
assembly which uses the principle of flame rectification to
determine the presence or absence of flame.
MAINTENANCE
WARNING
HIGH VOLTAGE!
Goodman
74death due to
To avoid personal
injury or
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 handling or vibration could damage the igniter
resulting in premature failure. Only a qualified servicer
should ever handle the igniter.
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.
CAUTION
Goodman 119
To ensure proper unit performance, adhere to the filter
sizes given in the Recommended Minimum Filter Size
chart 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.
Filter Maintenance
Improper filter maintenance is the most common cause of
inadequate heating or cooling performance. Filters should be
cleaned (permanent) or replaced (disposable) every 2 months or
as required. When replacing a filter, it must be replaced with a
filter of the same type and size.
Filter Removal
Depending on the installation, differing filter arrangements can be
applied. Filters can be installed in either the central return register
or a side panel external filter rack (upflow only).
A media air filter or electronic air cleaner can be used as an
alternate filter. Follow the filter sizes given in the Recommended
Minimum Filter Size chart to ensure proper unit performance.
To remove filters from an external filter rack in an upright upflow
installation, follow the directions provided with external filter rack
kit.
Horizontal Unit Filter Removal
Filters in horizontal installations are located in the central return
register or the ductwork near the furnace.
To remove:
1. Turn off electrical power to the furnace.
2. Remove the filter(s) from the central return register or
ductwork.
3. Replace the filter(s) by reversing the procedure for removal.
4. Turn on electrical power to the furnace.
Media Air Filter or Electronic Air Cleaner Removal
Follow the manufacturer’s directions for service.
29
Burners
WARNING
To avoid personal injury or death due to electrical shock,
do not remove any internal compartment covers or
attempt any adjustment. Contact a qualified servicer at
once if an abnormal flame should develop.
Visually inspect the burner flames periodically during the heating
season. Turn on the furnace at the thermostat and allow several
minutes for flames to stabilize, since any dislodged dust will alter
the flames normal appearance. Flames should be stable, quiet,
soft and blue (dust may cause orange tips but they must not be
yellow). They should extend directly outward from the burners
without curling, floating or lifting off. Flames must not impinge on
the sides of the heat exchanger firing tubes.
Induced Draft and Circulator Blowers
The bearings in the induced draft blower and circulator blower
motors are permanently lubricated by the manufacturer. No
further lubrication is required. Check motor windings for
accumulation of dust which may cause overheating. Clean as
necessary.
Condensate Trap and Drain System
(Qualified Servicer Only)
Annually inspect the drain tubes, drain trap and field-supplied
drain line for proper condensate drainage. Check drain system
for hose connection tightness, blockage and leaks. Clean or
repair as necessary.
Flame Sensor (Qualified Servicer Only)
Under some conditions, the fuel or air supply can create a nearly
invisible coating on the flame sensor. This coating acts as an
insulator causing a drop in the flame sense signal. If the flame
sense signal drops too low, the furnace will not sense flame and
will lock out. The flame sensor should be carefully cleaned by a
qualified servicer using emery cloth or steel wool. Following
cleaning, the flame sense signal should be as indicated in the
Specifications Sheet.
Flue Passages (Qualified Servicer Only)
The heat exchanger flue passageways should be inspected at the
beginning of each heating season. If necessary, clean the
passageways as outlined below.
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 collector box cover.
5. Remove the recuperator coil front cover to expose the coil
tubes and turbulators.
30
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 the residue from the furnace by 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 “Start-Up
Procedure and Adjustments” to reduce the chances of
repeated fouling.
Before Leaving an Installation
■
■
■
Cycle the furnace with the thermostat at least 3 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.
Repair and Replacement Parts
When ordering any of the listed functional parts, be sure to
provide the furnace model, manufacturing and serial numbers
with the order.
Although only functional parts are shown in the parts list, all sheet
metal parts, doors, etc., may be ordered by description.
Parts are available from your distributor.
Functional Parts List
■
Gas Control Valve
■
Blower Motor
■
Gas Manifold
■
Blower Wheel
■
Natural Gas Orifice
■
Blower Mounting Bracket
■
Propane Gas Orifice
■
Blower Cutoff
■
Igniter
■
Blower Housing
■
Flame sensor
■
Inductor
■
Rollout Limit Switch
■
Heat Exchanger
■
Primary Limit Switch
■
Door Switch
■
Auxiliary Limit Switch
■
Coil Front Cover
■
Pressure Switch
■
Integrated Control Module
■
Induced Draft Blower
■
Transformer
TROUBLESHOOTING
Electrostatic Discharge (ESD) Precautions
Fault Recall
NOTE: Discharge static electricity accumulated in the body
before touching the unit. An electrostatic discharge can adversely
affect electrical components.
Use the following steps during furnace installations 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.
NOTE: Do not touch the integrated control module or any
wire connected to the control prior to discharging your body’s
electrostatic charge to ground.
2. Firmly touch a clean, unpainted, metal surface of the furnace
away from the control. Any tools held in a person’s hand
during grounding will be discharged also.
3. Service the integrated control module or connecting wiring
after following the discharge process in Step 2.
NOTE: Do not recharge your body with static electricity by
moving or shuffling your feet or touching ungrounded
objects. If you touch an ungrounded object, repeat Step 2
before touching the control or wires.
4. Follow steps 1 through 3 before removing a new control from
its container or installing the control on a furnace. Return any
old or new controls to their containers before touching any
ungrounded object.
The ignition control is equipped with a momentary pushbutton
switch that can be used to display the last 6 faults on the dual
7-segment LED display. The control must be in Standby Mode
(no thermostat inputs) to use the feature. Depress the switch for
approximately 2 seconds. Release the switch when the LED
display is turned off. The last 6 faults will be displayed most
recent to least recent on the dual 7-segment LED display.
NOTE: Consecutively repeated faults are stored a maximum of
3 times. For example, a clogged return air filter causes the
furnace limit to trip repeatedly. The control will only store this fault
the first 3 consecutive times the fault occurs.
Resetting from Lockout
Furnace lockout results when a furnace is unable to achieve
ignition after 3 attempts during a single call for heat. It is
characterized by a nonfunctioning furnace and a “E0” code
displayed on the dual 7-segment display. If the furnace is in
“lockout,” it will (or can be) reset in any of the following ways.
1. Automatic reset. The integrated control module will
automatically reset itself and attempt to resume normal
operations following a 1-hour lockout period.
2. Manual power interruption. Interrupt 115-volt power to the
furnace.
3. Manual thermostat cycle. Lower the thermostat so that there
is no longer a call for heat for 1 to 20 seconds, and then reset
to previous setting.
NOTE: If the condition which originally caused the lockout still
exists, the control will return to lockout. Refer to the “Diagnostic
Chart.”
Status Codes
Internal control fault/no power
b 0 Blower motor not running
O P Normal operation
b 1 Blower communication error
E 0 Lockout due to excessive retries
b 2 Blower HP mismatch
E 1 Low-stage pressure switch stuck closed at start of heating
cycle
b 3 Blower motor operating in power, temperature or speed
limit
E 2 Low-stage pressure switch stuck open
b 4 Blower motor current trip or lost rotor
E 3 Open high-limit switch
b 5 Blower motor locked rotor
E 4 Flame detected when no flame should be present
b 6 Over/under voltage trip or over temperature trip
E 5 Open fuse
b 7 Incomplete parameters sent to motor
E 6 Low flame signal
b 9 Low indoor airflow
E 7 Igniter fault or improper grounding
C 1 Low-stage cooling
E 8 High-stage pressure switch stuck closed at start of heating
cycle
C 2 High-stage cooling
E 9 High-stage pressure switch stuck open
E A Reversed 115 VAC polarity
d 0 Data not yet on network
L O Low-stage heat
H I
High-stage heat
F Continuous fan
1 2 CFM/100; Alternates with C1, C2, LO, HI, F
d 4 Invalid memory card data
31
Diagnostic Chart
WARNING
Goodman 118 Long
HIGH VOLTAGE!
To avoid personal injury or death due to electrical shock, disconnect electrical power
before performing any service or maintenance.
The dual 7-segment LED display will display an error code that may contain a letter and number. The error code may be used to assist
in troubleshooting the unit.
Symptoms of
Abnormal
Operation
■
■
Furnace fails to
operate.
Integrated
control module
diagnostic LED
display
provides no
signal.
Diagnostic/
Status LED
Code
Fault Description Possible Causes
None
■
■
■
No 115-volt
power to
furnace, or no
24-volt power to
integrated
control module.
Blown fuse or
circuit breaker.
Internal fault in
Integrated
control module.
■
■
■
Manual disconnect
switch Off, door
switch open or
24-volt wire
improperly
connected or
loose.
Blown fuse or
circuit breaker.
Integrated control
module has an
internal fault.
Corrective Actions
■
■
■
■
Notes and Cautions
Assure 115-volt power
to the furnace, and
24-volt power to
integrated control
module.
Check integrated
control module fuse.
Replace with 3A
automotive fuse, if
necessary.
Check for possible
shorts in 115-volt and
24-volt circuits. Repair
as necessary.
Replace bad
integrated control
module.
■
■
■
■
Turn off power prior to
repair.
Replace integrated
control module fuse
with 3A automotive
fuse.
Read precautions in
“Electrostatic
Discharge” section of
manual.
Replace integrated
control module with
current replacement
parts.
■
LED display
indicates “OP.”
OP
■
Normal
operation
■
Normal operation
■
None
■
Normal operation
■
Furnace fails to
operate.
Integrated
control module
LED display
provides “E0”
error code.
E0
■
Furnace lockout
due to an
excessive
number of
ignition “retries”
(3 total).
■
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.
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.
■
Locate and correct gas
interruption.
Check front cover
pressure switch
operation (hose,
wiring, contact
operation). Correct if
necessary.
Replace or realign
igniter. Igniter is fragile,
handle gently.
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.
■
Turn off power prior to
repair.
Igniter is fragile,
handle with care.
Sand flame sensor
with emery cloth.
See “Vent/Flue Pipe”
section for piping
details.
■
■
32
■
■
■
■
■
■
■
■
Symptoms of
Abnormal
Operation
■
■
■
■
Diagnostic/
Status LED
Code
Fault Description Possible Causes
Furnace fails to
operate.
Integrated
control module
LED display
provides “E1”
error code.
E1
Induced draft
blower runs
continuously
with no further
furnace
operation.
Integrated
control module
LED display
provides “E2”
error code.
E2
■
■
Low-stage
pressure switch
circuit is closed
at start of
heating cycle.
■
Low-stage
pressure switch
circuit is not
closed.
■
■
■
■
■
■
■
Circulator
blower runs
continuously.
No furnace
operation.
Integrated
control module
LED display
provides “E3”
error code.
E3
■
■
Primary limit or
auxiliary limit
circuit is open.
Rollout limit
circuit is open.
■
■
■
■
Corrective Actions
Low-stage
pressure switch
contacts sticking.
Shorts in pressure
switch circuit
wiring.
■
Pressure switch
hose blocked,
pinched or
connected
improperly.
Blocked flue and/or
inlet air pipe,
blocked drain
system or weak
induced draft
blower.
Incorrect pressure
switch setpoint or
malfunctioning
switch contacts.
Loose or
improperly
connected wiring.
■
Insufficient
conditioned air
over the heat
exchanger.
Blocked filters,
restrictive
ductwork, improper
circulator blower
speed, or failed
circulator blower.
Flame rollout.
Misaligned
burners, blocked
flue and/or air inlet
pipe or failed
induced draft
blower.
Loose or
improperly
connected wiring.
■
■
■
■
■
■
■
■
■
■
■
■
■
■
Induced draft
blower and
circulator
blower runs
continuously.
No furnace
operation.
Integrated
control module
LED display
provides “E4”
error code.
E4
■
Flame sensed
with no call for
heat.
■
■
■
Short to ground in
flame sense circuit.
Lingering burner
flame.
Slow closing gas
control valve.
■
■
■
Notes and Cautions
Replace low-stage
pressure switch.
Repair short in wiring.
■
Inspect pressure
switch hose. Repair/
replace, if necessary,
Inspect flue and/or
inlet air piping for
blockage, proper
length, elbows and
termination.
Check drain system.
Correct as necessary.
Check induced draft
blower performance.
Correct as necessary.
Correct pressure
switch setpoint or
contact motion.
Tighten or correct
wiring connection.
■
Check filters and
ductwork for blockage.
Clean filters or remove
obstruction.
Check circulator
blower speed and
performance. Correct
speed or replace
blower if necessary.
Check burners for
proper alignment.
Check flue and air inlet
piping for blockage,
proper length, elbows
and termination.
Correct as necessary.
Check induced draft
blower for proper
performance. Replace,
if necessary.
Tighten or correct
wiring connection.
■
Correct short at flame
sensor or in flame
sensor wiring.
Check for lingering
flame.
Verify proper operation
of gas control valve.
■
■
■
■
■
■
Turn off power prior to
repair.
Replace pressure
switch with correct
replacement part.
Turn off power prior to
repair.
Replace pressure
switch with correct
replacement part.
Replace induced draft
blower with correct
replacement part.
Turn off power prior to
repair.
See Specification
Sheet applicable to
your model for
allowable rise range
and proper circulator
speed.
See “Vent/Flue Pipe”
section for piping
details.
Turn off power prior to
repair.
33
Symptoms of
Abnormal
Operation
■
■
■
■
■
■
■
■
■
34
Diagnostic/
Status LED
Code
Fault Description Possible Causes
No furnace
operation.
Integrated
control module
LED display
provides “E5”
error code.
E5
Furnace not
operating.
Integrated
control module
LED display
provides “E6”
error code.
E6
■
■
Open fuse.
Flame sense
microamp signal
is low.
■
■
■
■
Furnace
operating on
low stage gas
with high stage
induced draft
blower
High stage
circulator
blower
(temperature, of
conditioned air,
lower than
typical).
Integrated
control module
LED display
provides “E7”
error code.
E7
Furnace fails to
operate on high
stage. Furnace
operates
normally on low
stage.
Integrated
control module
LED display
provides “E8”
error code.
E8
■
Problem with
igniter circuit.
■
■
■
■
Short in low voltage
wiring.
Corrective Actions
■
Flame sensor is
coated/oxidized.
Flame sensor
incorrectly
positioned in
burner flame.
Lazy burner flame
due to improper
gas pressure or
combustion air.
■
Improperly
connected igniter.
Shorted igniter.
Poor unit ground.
Igniter relay fault on
integrated control
module.
■
■
■
■
■
■
■
■
■
■
High-stage
pressure switch
circuit is closed
at start of
heating cycle.
Induced draft
blower is
operating.
Furnace is
operating on
low stage only.
■
■
High-stage
pressure switch
contacts sticking.
Shorts in pressure
switch circuit
wiring.
■
■
Notes and Cautions
Locate and correct
short in low voltage
wiring.
■
Sand flame sensor if
coated/oxidized.
Inspect for proper
sensor alignment.
Check inlet air piping
for blockage, proper
length, elbows and
termination.
Compare current gas
pressure to rating plate
info. Adjust as needed.
■
Check and correct
wiring from integrated
control module to
igniter.
Replace shorted
igniter.
Check and correct
furnace ground wiring.
Check igniter output
from control. Replace,
if necessary.
■
Replace high-stage
pressure switch.
Repair short in wiring.
■
■
■
■
■
■
■
■
Turn off power prior to
repair.
Replace fuse with 3A
automotive fuse.
Turn off power prior to
repair.
Sand flame sensor
with emery cloth.
See “Vent/Flue Pipe”
section for piping
details.
See rating plate for
proper gas pressure.
Turn off power prior to
repair.
Replace igniter with
correct replacement
part.
Replace control with
correct replacement
part.
Turn off power prior to
repair.
Replace pressure
switch with correct
replacement part.
Symptoms of
Abnormal
Operation
■
■
Furnace fails to
operate on high
stage. Furnace
operates
normally on low
stage.
Integrated
control module
LED display
provides “E9”
error code.
Diagnostic/
Status LED
Code
Fault Description Possible Causes
E9
■
■
■
High-stage
pressure switch
circuit is not
closed.
Induced draft
blower is
operating.
Furnace is
operating on
low stage only.
■
■
■
■
■
■
■
■
Furnace fails to
operate.
Integrated
control module
LED display
provides “EA”
error code.
EA
Furnace fails to
operate.
Integrated
control module
LED display
provides “d0”
error code.
d0
■
Polarity of
115-volt AC is
reversed.
■
■
■
Data not yet on
network.
■
Corrective Actions
Pressure switch
hose blocked,
pinched or
connected
improperly.
Blocked flue and/or
inlet air pipe,
blocked drain
system or weak
induced draft
blower.
Incorrect pressure
switch setpoint or
malfunctioning
switch contacts.
Loose or
improperly
connected wiring.
■
Polarity of 115-volt
AC power to
furnace or
integrated module
is reversed.
Poor furnace
ground.
■
Furnace does not
contain any shared
data.
■
■
■
■
■
■
■
■
Notes and Cautions
Inspect pressure
switch hose. Repair, if
necessary.
Inspect flue and/or
inlet air piping for
blockage, proper
length, elbows and
termination.
Check drain system.
Correct as necessary.
Check induced draft
blower performance.
Correct as necessary.
Correct pressure
switch setpoint or
contact motion.
Tighten or correct
wiring connection.
■
Review wiring diagram
to correct polarity.
Verify proper ground.
Correct if necessary.
Check and correct
wiring.
■
Turn off power prior to
repair.
Populate shared data
set using memory
card.
■
Turn off power prior to
repair.
Use memory card for
the specific model.
Insert memory card
before turning on
power. Memory card
may be removed after
data is loaded.
Turn off power before
removing memory
card.
Error code will be
cleared once data is
loaded.
■
■
■
■
■
■
■
■
Operation
different than
expected or no
operation.
Integrated
control module
LED display
provides “d4”
error code.
d4
■
Invalid memory
card data.
■
Shared data set on
memory card has
been rejected by
integrated control
module.
■
■
Verify shared data set
is correct for the
specific model.
Repopulate data using
correct memory card, if
required.
■
■
■
■
■
Turn off power prior to
repair.
Replace pressure
switch with correct
replacement part.
Replace induced draft
blower with correct
replacement part.
Turn off power prior to
repair.
Use memory card for
the specific model.
Insert memory card
before turning on
power. Memory card
may be removed after
data is loaded.
Turn off power before
removing memory
card.
Error code will be
cleared once data is
loaded.
35
Symptoms of
Abnormal
Operation
■
■
Furnace fails to
operate.
Integrated
control module
LED display
provides “b0”
error code.
Diagnostic/
Status LED
Code
Fault Description Possible Causes
b0
■
Circulator
blower motor is
not running
when it should
be running.
■
■
■
■
■
■
■
Furnace fails to
operate.
Integrated
control module
LED display
provides “b1”
error code.
b1
Furnace fails to
operate.
Integrated
control module
LED display
provides “b2”
error code.
b2
■
Integrated
control module
has lost
communication
s with circulator
blower motor.
■
■
■
■
Circulator
blower motor
horse power in
shared data set
does not match
circulator
blower motor
horse power.
■
■
Corrective Actions
Loose wiring
connection at
circulator motor
power leads or
circulator motor
power leads
disconnected.
Open circuit in
inductor or loose
wiring connection
at inductor (³⁄₄ Hp
and 1 Hp models
only).
Failed circulator
blower motor.
■
Loose wiring
connection at
circulator motor
control leads.
Failed circulator
blower motor.
Failed integrated
control module.
■
Incorrect circulator
blower motor in
furnace.
Incorrect shared
data set in
integrated control
module.
■
■
■
■
■
■
Notes and Cautions
Tighten or correct
wiring connection.
Verify continuous
circuit through
inductor. Replace if
open or short circuit.
Check circulator
blower motor. Replace
if necessary.
■
Tighten or correct
wiring connection.
Check circulator
blower motor. Replace
if necessary.
Check integrated
control module.
Replace if necessary.
■
Verify circulator blower
motor horse power is
the same specified for
the specific furnace
model. Replace if
necessary.
Verify shared data set
is correct for the
specific model.
Repopulate data using
correct memory card, if
required.
■
■
■
■
■
■
■
■
■
■
■
■
■
36
Furnace
operates at
reduced
performance.
Airflow
delivered is less
than expected.
Integrated
control module
LED display
provides “b3”
error code.
b3
■
Circulator
blower motor is
operating in a
power,
temperature or
speed limiting
condition.
■
■
■
■
Blocked filters.
Restrictive
ductwork.
Undersized
ductwork.
High ambient
temperatures.
■
■
■
■
Check filters for
blockage. Clean filters
or remove obstruction.
Check ductwork for
blockage. Remove
obstruction. Verify all
registers are fully open.
Verify ductwork is
appropriately sized for
system. Resize/replace
ductwork if necessary.
See “Product
Description” and
“Location
Requirements and
Considerations” for
furnace installation
requirements.
■
Turn off power prior to
repair.
Replace inductor with
correct replacement
part.
Replace circulator
motor with correct
replacement part.
Turn off power prior to
repair.
Replace circulator
motor with correct
replacement part.
Replace integrated
control module with
correct replacement
part.
Turn off power prior to
repair.
Replace motor with
correct replacement
part.
Use memory card for
the specific model.
Insert memory card
before turning on
power. Memory card
may be removed after
data is loaded.
Turn off power before
removing memory
card.
Error code will be
cleared once shared
data and motor horse
power match.
Turn off power prior to
repair.
Symptoms of
Abnormal
Operation
■
■
■
■
■
■
■
■
Furnace fails to
operate.
Integrated
control module
LED display
provides “b4”
error code.
Diagnostic/
Status LED
Code
Fault Description Possible Causes
b4
■
■
Furnace fails to
operate.
Integrated
control module
LED display
provides “b5”
error code.
b5
Furnace fails to
operate.
Integrated
control module
LED display
provides “b6”
error code.
b6
Furnace fails to
operate.
Integrated
control module
LED display
provides “b7”
error code.
b7
■
■
Furnace
operates at
reduced
performance or
operates on low
stage when
high stage is
expected.
Integrated
control module
LED display
provides “b9”
error code.
■
Circulator
blower motor
fails to start
10 consecutive
times.
■
■
■
■
■
■
■
■
■
Circulator
blower motor
senses a loss of
rotor control.
Circulator
blower motor
senses high
current.
b9
■
Circulator
blower motor
shuts down for
over or under
voltage
condition.
Circulator
blower motor
shuts down due
to over
temperature
condition on
power module.
■
Circulator
blower motor
does not have
enough
information to
operate
properly.
Motor fails
to start
40 consecutive
times.
■
Airflow is lower
than demanded.
■
■
■
■
Corrective Actions
Abnormal motor
loading, sudden
change in speed or
torque, sudden
blockage of
furnace air inlet or
outlet.
High loading
conditions, blocked
filters, very
restrictive
ductwork,
blockage of
furnace air inlet or
outlet.
■
Check filters, filter
grills/registers, duct
system and furnace air
inlet/outlet for
blockages.
■
Turn off power prior to
repair.
Obstruction in
circulator blower
housing.
Seized circulator
blower motor
bearings.
Failed circulator
blower motor.
■
Check circulator
blower for
obstructions. Remove
and repair/replace
wheel/motor, if
necessary.
Check circulator
blower motor shaft
rotation and motor.
Replace motor if
necessary.
■
Turn off power prior to
repair.
Replace motor with
correct replacement
part.
Replace wheel with
correct replacement
part.
High AC line
voltage to furnace.
Low AC line
voltage to furnace.
High ambient
temperatures.
■
Check power to
furnace. Verify line
voltage to furnace is
within the range
specified on the
furnace rating plate.
See “Product
Description” and
“Location
Requirements and
Considerations” for
furnace installation
requirements.
■
Turn off power prior to
repair.
Error with
integrated control
module.
Motor has a locked
rotor condition.
■
Check integrated
control module. Verify
control is populated
with correct shared
data set. See data
errors above for
details.
Check for locked rotor
condition (see error
code above for
details).
■
Turn off power prior to
repair.
Replace with correct
replacement part(s).
Use memory card for
the specific model.
Check filters for
blockage. Clean filters
or remove obstruction.
Check ductwork for
blockage. Remove
obstruction. Verify all
registers are fully open.
Verify ductwork is
appropriately sized for
system. Resize/replace
ductwork if necessary.
■
■
■
■
■
■
Notes and Cautions
Blocked filters.
Restrictive
ductwork.
Undersized
ductwork.
■
■
■
■
■
■
■
Turn off power prior to
repair.
37
DIP Switch Chart
Goodman 118 Long
WARNING
HIGH VOLTAGE!
To avoid personal injury or death due to electrical shock, disconnect electrical power
before performing any service or maintenance.
Switch
DIP Switch Number
Bank
Purpose
Function
1
2
3
4
5
6
7
8
9
10
S1
Heat Off
Delay
90 Seconds
Off
Off
---
---
---
---
---
---
---
---
120 Seconds
On
Off
---
---
---
---
---
---
---
---
150 Seconds*
Off
On
---
---
---
---
---
---
---
---
180 Seconds
On
On
---
---
---
---
---
---
---
---
---
---
Off
---
---
---
---
---
---
---
---
---
On
---
---
---
---
---
---
---
5-Min Delay
---
---
---
Off
---
---
---
---
---
---
Auto Delay
---
---
---
On
---
---
---
---
---
---
Bus BIAS
BIAS
On*
On*
---
---
---
---
---
---
---
---
TERM
Bus Termination ---
---
On*
---
---
---
---
---
---
---
Thermostat 1-Stage T-Stat
Setup
2-Stage T-Stat
S2
S3
Cooling
A
Speed Tap
B
Off
Off
---
---
---
---
---
---
---
---
On
Off
---
---
---
---
---
---
---
---
C
Off
On
---
---
---
---
---
---
---
---
D*
On
On
---
---
---
---
---
---
---
---
---
---
Off
Off
---
---
---
---
---
---
10%
---
---
On
Off
---
---
---
---
---
---
-10%
---
---
Off
On
---
---
---
---
---
---
Normal
---
---
On
On
---
---
---
---
---
---
A*
---
---
---
---
Off
Off
---
---
---
---
B
---
---
---
---
On
Off
---
---
---
---
C
---
---
---
---
Off
On
---
---
---
---
D
---
---
---
---
On
On
---
---
---
---
---
---
---
---
---
---
Off
Off
---
---
---
---
---
---
---
---
On
Off
---
---
C
---
---
---
---
---
---
Off
On
---
---
D
---
---
---
---
---
---
On
On
---
---
Disabled*
---
---
---
---
---
---
---
---
Off
Unused
Enabled
---
---
---
---
---
---
---
---
On
Unused
Adjust Taps Normal*
S4
Ramping
Profiles
Heating
A
Speed Tap
B*
S5
DEHUM
*Indicates factory setting
---
38
Not applicable
WIRING DIAGRAM
WARNING
Goodman 6 Long
HIGH VOLTAGE!
Disconnect ALL power before servicing.
Multiple power sources may be present.
Failure to do so may cause property damage, personal injury or death.
GND
Junction Box
Induced Draft Blower 2-Stage Pressure Switch Assembly
Equipment GND
24V Humidifier
Field GND
Hot
Surface
Igniter
2-Circuit
2 1 Connector
Field Splice
Switch Temp.)
(
2-Stage
Gas
Control
Valve
W
Pressure Switch
Overcurrent
Prot. Device
Y
Low-Fire
Pressure
Switch
C
C
NO
L
WARNING:
Disconnect Power
Before Servicing. Wiring
N To Unit Must Be Properly
Polarized and Grounded.
BK
W
Disconnect
NO
Y
BK
Igniter
High-Fire
Pressure
Switch
To 115 VAC/10/60 Hz Power Supply with
Overcurrent Protection Device
HI 2
C 3
Y
W
Wir Diag G 2009
BU
PM 1
BR
To 115 VAC/10/60 Hz Power Supply with
Overcurrent Protection Device
GND
L
N
1040F00660A
Flame
WARNING:
Sensor
Disconnect Power
Before Servicing. Wiring
To Unit Must Be Properly
Polarized and Grounded.
Disconnect
Manual Reset Rollout Limit Controls
Low Voltage (24V)
Y
Auto Reset Primary Limit Control
High Voltage Field
PR
Y
Junction
W
R
BK
1
R
5
4
R
Y
7
11
10
14
13
W
Y
R
BR
BU
BU
5-Circuit Connector
LINE
40VA Transformer
FS
EAC
HUM
W
4
23
1
BK
Circulator Blower
BK
G
PK
24 VAC
Auto Reset Auxiliary
Auto Reset
Primary Limit Control
PSO (7)
W2
To
Micro
Y2
High-Fire
Pressure Switch
O
HLI (1)
DEHUM
Inductor Coil
70kBtu, 90kBtu, 115kBtu Models Only
C
C
Manual Reset Rollout
Limit Controls
MVL (13)
PM
HI
MVH (14)
C
MVC (8)
BK
Blower Compartment
Door Switch
(Open When Door Open)
Low-Fire
Pressure Switch
C
PS2 (12) NO
G
To
R
Check codes for proper wiring and circuit protection before installation.
NOTES:
4.
1. Set heat anticipator on room thermostat at 0.7 amps.
2. Manufacturer’s specified replacement parts must be used
5.
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 105ºC. Use copper conductors
only.
40VA Transformer
24V Humidifier
PS1 (2)
NO
W1
W
BK
W
GND
Neutral
115 VAC
TH (4)
HLO (10)
Y1
R
BK
5
4
3
2
1
Neutral
To +VDC Limit Control
COOL
GY
Fuse 3A
R
24
VAC
115
VAC
BU
BK
Neutral
Humidifier
Flame Sensor
R
ECM Motor
Harness
Neutral
IGN
LINE
ADJUST
NEUTRAL
Integrated Control Module
2
OR
HUM
Induced
Draft
Blower
FS
4V Thermostat Connections 24V Humidifier
DIP Switches
4-Circuit Motor
2-Stage Integrated Connector
Control Module
W
W
BU
BK
BK
1
2
3
4
5
3
DELAY
IND LO
Hot Surface Igniter
2ND STG DLY 6
T-STAT
9
HEAT OFF
DELAY
12
UNUSED
15
DEHUM
8
Electronic
Air Cleaner
IND HI
Y
HEAT
1
2
3
4
BR
See NOTE 5.
EAC
Integrated Control Module
Y
R
Fuse
24 V
3A
1
2
R
C
G
W1
W2
Y1
Y2
O
DEHUM
R
Wiring is subject to change.
Always refer to the wiring
diagram on the unit for the
most up-to-date wiring.
Auto Reset Auxiliary Limit Control
Diagnostic
LEDs
Neutral
Neutral
LINE
PR
24V Thermostat Connections
W
GY
W
BK
R
BU
OR
Y
G
PK
A
V
BR
Indoor Air
Circulator
Blower
GND
GND
Blower Compartment
Symbol
Junction Box
Inductor Coil
70 kBtu, 90 kBtu,
115 kBtu Models Only
G
Induced Draft Blower
Burner Compartment
W
Gray:
White:
Black:
Red:
Blue:
Orange:
Yellow:
Green:
Pink:
Azure:
Violet:
Brown:
3
2
1
Door
Switch
W
Terminal
Internal to
Integrated Control
Plug Connection
Color
Chassis Ground
R
PR
OR
PR
Low Voltage Field
High Voltage (115V)
To
Micro
GND (5)
TR (11)
GND (4)
+ VDC (1)
RX (2)
TX (3)
GND
C
Gas Control
Valve
Indoor Air
Circulator
Blower
Integrated Control Module
Humidifier
Furnace must be permanently grounded and conform to NEC
and local codes.
To recall the last 6 faults, most recent to least recent, depress
switch for more than 2 seconds in standby (no thermostat
inputs).
39
ASSISTANCE OR SERVICE
If you need further assistance, you can write to the below
address with any questions or concerns:
Tradewinds Distributing Company, LLC
14610 Breakers Drive
Jacksonville, FL 32258
WPIO-369B
© 2010. All rights reserved.
Please include a daytime phone number in your correspondence.
Or call toll free: 1-866-944-7575.
®Registered Trademark/TM Trademark of Whirlpool, U.S.A.,
Manufactured under license by Tradewinds Distributing Company, LLC, Jacksonville, Florida.
Warranty provided by manufacturer. All other trademarks are owned by their respective companies.
COMFORT COMMITMENT is a trademark of Tradewinds Distributing Company, LLC.
9/10
Printed in U.S.A.