Amana GMSS9 Single Stage Gas Furnaces Accessories

Product Information

Specifications:

• Model: GMSS9/GCSS9/AMSS9/ACSS9
• Type: Single Stage Gas Furnaces and Accessories
• Manufacturer: Maytag Corporation
• Trademark: Maytag
• Year: November 2014

Product Usage Instructions

Important Notices:

This manual is intended for use by qualified, professionally trained HVAC technicians only. Goodman does not assume any responsibility for property damage or personal injury due to improper service procedures or services performed by an unqualified person. The material in this manual does not supersede the manufacturer’s installation and operation instructions.

Safety Precautions:

To prevent the risk of property damage, personal injury, or death, please adhere to the following safety precautions:

• Do not store combustible materials or use gasoline or other flammable liquids or vapors in the vicinity of this appliance.
• Goodman will not be responsible for any injury or property damage arising from improper service or service procedures. If you install or perform service on this unit, you assume responsibility for any personal injury or property damage that may result.
• High voltage disconnect all power before servicing or installing this unit. Multiple power sources may be present.
  Failure to do so may cause property damage, personal injury, or death.

Contact Information:

If you require further assistance or need to locate an authorized servicer, please use the following contact information:

• Toll-Free (U.S. only): 1-877-254-4729
• Email: customerservice@goodmanmfg.com
• Fax: 731-856-1821 (Not a technical assistance line for dealers.)
• Outside the U.S.: 1-713-861-2500 (Not a technical assistance line for dealers.)

FAQs

• Q: What should I do if I smell gas?
  • A: If you smell gas, do not try to light any appliance or touch any electric switch. Do not use any phone in your building. Immediately call your gas supplier from a neighbor’s phone and follow their instructions. If you cannot reach your gas supplier, call the fire department.

Service Instructions
GMSS9/GCSS9/AMSS9/ ACSS9
Single Stage Gas Furnaces and Accessories

This manual is to be used by qualified, professionally trained HVAC technicians only. Goodman does not assume any responsibility for property damage or personal injury due to improper service procedures or services performed by an unqualified person. The material in this manual does not supercede manufacturer’s installation and operation instructions.

is a registered trademark of Maytag Corporation or its related companies and is used under license. All rights reserved.
Copyright © 2014 Goodman Company, L.P.

RS6612012r1 November 2014

IMPORTANT INFORMATION

Pride and workmanship go into every product to provide our customers with quality products. It is possible, however, that during its lifetime a product may require service. Products should be serviced only by a qualified service technician who is familiar with the safety procedures required in the repair and who is equipped with the proper tools, parts, testing instruments and the appropriate service manual. REVIEW ALL SERVICE INFORMATION IN THE APPROPRIATE SERVICE MANUAL BEFORE BEGINNING REPAIRS.
IMPORTANT NOTICES FOR CONSUMERS AND SERVICERS
RECOGNIZE SAFETY SYMBOLS, WORDS AND LABELS

WARNING
TO PREVENT THE RISK OF PROPERTY DAMAGE, PERSONAL INJURY, OR DEATH,
DO NOT STORE COMBUSTIBLE MATERIALS OR USE GASOLINE OR OTHER FLAMMABLE LIQUIDS OR VAPORS IN THE VICINITY OF THIS APPLIANCE.

WARNING
GOODMAN W ILL NOT BE RESPONSIBLE FOR ANY INJURY OR PROPERTY DAM AGE ARISING FROM IMPROPER SERVICE OR SERVICE PROCEDURES. IF YOU INSTALL OR PERFORM SERVICE ON THIS UNIT, YOU A SSUME RESPONSIBILITY FOR ANY PERSONAL INJURY OR PROPERTY DAMAGE WHICH MAY RESULT. M ANY JURISDICTIONS REQUIRE A LICENSE TO INSTALL OR SERVICE HEATING AND AIR CONDITIONING EQUIPMENT.

WARNING
HIGH VOLTAGE DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO MAY CAUSE PROPERTY
DAMAGE, PERSONAL INJURY OR DEATH.

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IMPORTANT INFORMATION

To locate an authorized servicer, please consult your telephone book or the dealer from whom you purchased this product. For further assistance, please contact:

CONSUMER INFORMATION LINE GOODMAN® BRAND PRODUCTS
TOLL FREE 1-877-254-4729 (U.S. only)
email us at: customerservice@goodmanmfg.com
fax us at: 731-856-1821 (Not a technical assistance line for dealers.)

CONSUMER INFORMATION LINE AMANA® BRAND PRODUCTS TOLL FREE 1-877-254-4729 (U.S. only)
email us at: hac.consumer.affairs@amanahvac.com fax us at: 731-856-1821
(Not a technical assistance line for dealers.)

Outside the U.S., call 1-713-861-2500. (Not a technical assistance line for dealers.) Your telephone company will bill you for the call.

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IMPORTANT INFORMATION

CO can cause serious illness including permanent brain

damage or deat h.

B10 25 9 -21 6

Advertencia especial para la instalación de calentadores ó m anejadoras de aire en áreas cerradas com o estacionamientos ó cuartos de servicio.

Las emisiones de m onóxido de carbono pueden circular a través del aparat o cuando se opera en cualquier modo.

El monóxido de carbono puede causar enfermedades severas

como daño cerebral permanente ó muerte.

B10 25 9 -21 6

RISQUE D’EM POISONNEM ENT AU M ONOXYDE DE CARBONE

Cette vent ilat ion est nécessaire pour évit er le danger d’intoxicat ion au CO pouvant survenir si un appareil produisant du monoxyde de carbone continue de fonct ionner au sein de la zone confinée.
B10 25 9 -21 6
is a registered trademark of Maytag Corporation or its related companies and is used under license. All rights reserved.
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IMPORTANT INFORMATION

FOR YOUR SAFETY READ BEFORE OPERATING WARNING: If you do not follow these instructions
explosion may result causing property damage, personal injury or loss of life.
A. This appliance does not have a pilot. It is equipped with an ignition device which automatically lights the burner. Do not try to light the burner by hand.
B. BEFORE OPERATING smell all around the appliance area for gas. Be sure to smell next to the floor because some gas is heavier than air and will settle on the floor.
WHAT TO DO IF YOU SMELL GAS Do not try to light any appliance. Do not touch any electric 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.
C. Use only your hand to push in or turn the gas control lever. Never use tools. If the lever will not push in or turn by hand, don’t try to repair it, call a qualified service technician. Force or attempted repair may result in a fire or explosion.
D. Do not use this appliance if any part has been underwater. Immediately call a qualified service technician to inspect the appliance and to replace any part of the control system and any gas control which has been underwater.

OPERATING INSTRUCTIONS

MISE EN MARCHE

1. STOP! Read the safety information above on

this label.

2. Set the thermostat to lowest setting.
3. Turn off all power to the appliance.
4. This appliance is equipped with an ignition.

device which automatically lights the burner.

Do not try to light the burner by hand.

5. Push the gas control lever to “OFF” Position.

Do not force.

6. Wait five (5) minutes to clear out any gas. Then

smell for gas, including near the floor. If you

then smell gas, STOP! Follow “B”

in the safety. information above

on this label if you don’t smell

gas, go to next step. 7. Push gas control lever
to “ON”.

GAS INLET

8. Replace access panel.
9. Turn on all electric

AR RIVEE

power to the appliance.

ROBINET A GAZ MANUEL, EN POS

plancher, pour déceler une odeur de gaz. Si c’est le cas, ARRETER! Passer à l’étape B des instructions de sécuritié

“ON/MARCHE”

sur la portion supérieure de cette étiquette.

S’il n’y a pas d’odeur de gaz, passer à l’étape suivanté.

7. Pousse le levier du contrôle du gaz à “ON/MARCHE”

position.

8. Remettre en place le panneau d’accés.
9. Mettre l’appareil sous tension.
10. Régler le thermostat à la température desirée.
11. Si l’appareil ne se met pas en marche, suiyre les

instructions intitulées. Comment coupler l’admission

de gaz de l’appereil et appeler un technicien

MANUAL GAS

qualifié ou le fourrnisseur de gaz.

LEVER SHOWN

IN ON POSITION

TO TURN OFF GAS TO APPLIANCE
1. Set the thermostat to lowest setting. 2. Turn off all electric power to the appliance
if service is to be performed.
3. Push the gas control lever to “OFF” Position.
Do not force. 4. Replace control access panel.

IMPORTANT INFORMATION

FOR YOUR SAFETY READ BEFORE OPERATING
WARNI NG: If you do not follow these instructions exactly,a fire or explosion may result causing property damage,personal injury or loss of life.
A.This appliance does not have a pilot. It is equipped with an ignition device which automatically lights the burner. Do not tryto light the burner by hand.
B.BEFOREOPERATING smell all around the appliance
area for gas. Be sure to smell next to the floor because some gas is heavier than air and will settle on the floor.
WHAT TO DO IF YOU SMELL GAS
Do not try to light any appliance. Do not touch any electric 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.
C.Use only your hand to push in or turn the gas control lever. Never use tools. If the lever will not push in or turn by hand, don’t try to repair it,call a qualified service technician. Force or attempted repair may result in a fire or explosion.
D.Do not use this appliance if any part has been underwater. Immediately call a qualified service technician to inspect the appliance and to replace any part of the control system and any gas control which has been underwater.

OPERATING INSTRUCTIONS

MISEEN MARCHE

1. STOP. Read the safety information above on
   this label.

2.Set the thermostat to lowest setting.

3.Turn off all electric power to the appliance.

4.This appliance is equipped with an ignition

device which automatically lights the burner. Do not try to light the burner by hand.

5. Push the gas control lever to “OFF” Position.
   Do not force.

6.Wait five (5) minutes to clear out any gas.Then

smell for gas, including near the floor. If you
then smell gas, STOP. Follow “B”
in the safety information above

RO BIN ETAG AZ MANUEL,ENPOS “ON/MARCHE”

on this label if you don’t smell gas,go to next step.
7.Push gas control lever

G AS INLET

to “ON”.

8.Replace access panel.

ARRIVEE

9. Turn on all electric

DUGAZ

power to the appliance.

10.Setthermostattodesiredsetting. 11.If the appliance will not operate,
follow the instructions “ToTurn Off Gas ToAppliance” and call your

MANUAL GAS LEVER SHOWN IN “ON” POS

service technician or gas company.

TOTURNOFFGASTOAPPLIANCE

1.Set the thermostat to lowest setting.
2. Turn off all electric power to the appliance if service is to be performed.
3.Push the gas control lever to “OFF” Position.
Do not force.
4.Replace control access panel.

0140F00681 REV A
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IMPORTANT INFORMATION

FOR YOUR SAFETY READ BEFORE OPERATING

If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury or loss of life.

1. This appliance does not have a pilot. It is equipped with an ignition device which automatically lights the burners. Do not try to light the burners by hand.
   B. BEFORE OPERATING smell around the appliance area for gas. Be sure to smell next to the floor because some gas is heavier than air and will settle on the floor.
   WHAT TO DO IF YOU SMELL GAS Do not try to light any appliance. Do not touch any electric switch; do not use any telephone in your building. Immediately call your supplier from a neighbor’s phone. Follow the gas suppliers instructions.

If you cannot reach your gas supplier, call the fire department. C. Use only your hand to move the gas control switch or knob. Never use tools. If the gas control switch or knob will not operate, don’t try to repair it, call a qualified service technician. Force or attempted repair may result in a fire or explosion. D. Do not use this appliance if any part has been under water. Immediately call a qualified service technician to inspect the appliance and to replace any part of the control system and any gas control which has been under water.

OPERATING INSTRUCTIONS

1. STOP! Read the safety information above on this label. 2. Set the thermostat to lowest setting. 3. Turn off all electric power to the appliance. 4. This appliance is equipped with an automatic ignition system which automatically lights the burners. Do not try to light the burners by hand. 5. Remove control access panel. 6. Move the gas control switch or knob to “OFF”.
   GAS CONTROL SWITCH SHOWN IN “ON” POSITION

2. Wait five (5) minutes to clear out any gas. If you then smell gas, STOP! Follow “B” in the safety information above on this label. If you don’t smell gas, go to the next step. 8. Move the gas control switch or knob to “ON”. 9. Replace control access panel.
   10. Turn on all electric power to the appliance. 11. Set the thermostat to the desired setting. 12. If the appliance will not operate, follow the instructions “To Turn Off Gas To Appliance” and call your service technician or gas supplier.

TO TURN OFF GAS TO APPLIANCE

1. Set the thermostat to its lowest setting. 2. Turn off all electric power to the appliance if service is to be performed. 3. Remove control access panel.
2. Move the gas control switch or knob to “OFF”. Do not force. 5. Replace control access panel.

WARNING: Improper installation, adjustment, alteration, service or maintenance can cause injury or property damage. Refer to the user’s information manual provided with this furnace. For assistance or additional information consult a qualified installer, service agency or the gas supplier. This furnace must be installed in accordance with the manufacturers instructions and local codes. In the absence of local codes, follow the National Fuel Gas Code, ANSI Z223.1.
WARNING: If not installed, operated and maintained in accordance with the manufacturer’s instructions, this product could expose you to substances in fuel combustion which can cause death or serious illness and which are known to the State of California to cause cancer, birth defects or other reproductive harm. This product contains fiberglass insulation. Fiberglass insulation contains a chemical known by the State of California to cause cancer.

FOR YOUR SAFETY Do not store or use gasoline or

other flammable vapors and liquids in the vicinity of this

or any other appliance.

0140F00688 Rev A

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PRODUCT IDENTIFICATION
The model and manufacturing number are used for positive identification of component parts used in manufacturing. Please use these numbers when requesting service or parts information.

• 1
  Brand A- Amana® G- Goodman®
  Conf igurat ion M – Upf low / Horizont al C- Dow nf low/ Horizont al K – Dedicat ed Upf low D – Dedicat ed Dow nf low
  Airf l ow C- Variable Speed/ Comf ortNet E- High Ef f iciency S- Single Speed
  Gas Valve St ages M – Modulating V – 2 St age H – Convert ible 2 St age S- Single St age
  AFUE 97 – 97% AFUE 80 – 80% AFUE
  MBTU/ h 040 – 40,000 060 – 60,000 080 – 80,000 100 – 100,000 120 – 120,000

14

M inor Revision A – Init ial Release B – 1st Revision

M ajor Revision A – Init ial Release B – 1st Revision

Nox N – Nat ural Gas X – Low Nox

Cabinet Widt h A – 14″ B – 17.5″ C – 21″ D – 24.5″

M axim um CFM 3 – 1200 CFM 4 – 1600 CFM 5 – 2000 CFM

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PRODUCT IDENTIFICATION

MODEL # GMSS92

MFG #

DESCRIPTION

GMSS920402BNAA GMSS920603BNAA GMSS920803BNAA GMSS920804CNAA GMSS920805CNAA GMSS921004CNAA GMSS921005CNAA GMSS921205DNAA

Goodman® Brand 92% Single Stage Gas Furnace. 34.5″ tall, Upflow/Horizontal Installation, 1-stage gas valve induced draft. PSC motor. 120-volt silicon carbide 17-second hot surface ignition. Left or right gas pipe entry. The furnace also features an alum inized steel tubular heat exchanger. Available cabinet widths are 17.5″, 21″, and 24.5″ wide.

GCSS92

GCSS920402BNAA GCSS920603BNAA GCSS920804CNAA GCSS921005CNAA

Goodman® Brand 92% Single Stage Gas Furnace. 34.5″ tall, Downflow/Horizontal Installation, 1-stage gas valve induced draft. PSC motor. 120-volt silicon carbide 17-second hot surface ignition. Left or right gas pipe entry. The furnace also features an aluminized steel tubular heat exchanger. Available cabinet widths are 17.5″ and 21″ wide.

GMSS96

GMSS960402BNAA GMSS960603BNAA GMSS960803BNAA GMSS960804CNAA GMSS960805CNAA GMSS961005CNAA GMSS961205DNAA

Goodman® Brand 96% Single Stage Gas Furnace. 34.5″ tall, Upflow/Horizontal Installation,1-stage gas valve induced draft. PSC motor. 120 volt silicon carbide 17-second hot surface ignition. Left or right gas pipe entry. The furnace also features an alum inized steel tubular heat exchanger. Available cabinet widths are 17.5″ 21″ and 24.5″ wide.

GCSS96

GCSS960402BNAA GCSS960603BNAA GCSS960804CNAA GCSS961005CNAA GCSS961205DNAA

Goodman® Brand 96% Single Stage Gas Furnace. 34.5″ tall, Downflow/Horizontal Installation, 1-stage gas valve induced draft. PSC motor. 120-volt silicon carbide 17-second hot surface ignition. Left or right gas pipe entry. The furnace also features an aluminized steel tubular heat exchanger. Available cabinet widths are 17.5″, 21″, and 24.5″ wide.

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PRODUCT IDENTIFICATION

MODEL # AMSS92

MFG #

DESCRIPTION

AMSS920402BNAA AMSS920603BNAA AMSS920803BNAA AMSS920804CNAA AMSS920805CNAA AMSS921004CNAA AMSS921005CNAA AMSS921205DNAA

Amana® Brand 92% Single Stage Gas Furnace. Upflow/Horizontal Installation, 34.5″ tall, 1-stage gas valve induced draft. PSC motor. 120-volt silicon carbide 17second hot surface ignition. Left or right gas pipe entry. The furnace also features a stainless steel tubular heat exchanger. Available cabinet widths are 17.5″, 21″, and 24.5″ wide.

ACSS92

ACSS920402BNAA ACSS920603BNAA ACSS920804CNAA ACSS921005CNAA

Amana® Brand 92% Single Stage Gas Furnace. Downflow/Horizontal Installation, 34.5″ tall, 1-stage gas valve induced draft. PSC motor. 120-volt silicon carbide 17second hot surface ignition. Left or right gas pipe entry.The furnace also features a stainless steel tubular heat exchanger. Available cabinet widths are 17.5″ and 21″ wide.

AMSS96

AMSS960402BNAA AMSS960603BNAA AMSS960803BNAA AMSS960804CNAA AMSS960805CNAA AMSS961005CNAA AMSS961205DNAA

Amana® Brand 96% Single Stage Gas Furnace. Upflow/Horizontal Installation, 34.5″ tall, 1-stage gas valve induced draft. PSC motor. 120-volt silicon carbide 17second hot surface ignition. Left or right gas pipe entry. The furnace also features a stainless steel tubular heat exchanger. Available cabinet widths are 17.5″ 21″ & 24.5 wide.

ACSS96

ACSS960402BNAA ACSS960603BNAA ACSS960804CNAA ACSS961005CNAA ACSS961205DNAA

Amana® Brand 96% Single Stage Gas Furnace. Downflow/Horizontal Installation, 34.5″ tall, 1-stage gas valve induced draft. PSC motor. 120- volt silicon carbide 17-second hot surface ignition. Left or right gas pipe entry. The furnace also features a stainless steel tubular heat exchanger. Available cabinet widths are 17.5″, 21″, and 24.5″ wide.

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PRODUCT IDENTIFICATION

MODEL #
AFE18-60A
AMU1620 AMU1625 AMU2020 AMU2025 GMU1620 GMU1625 GMU2020 GMU2025

MFG #

DESCRIPTION

Fossil Fuel Kit. The AFE18-60A control is des igned for us e where the indoor coil is

located above/downstream of a gas or fossil fuel furnace when used with a heat pump.

N/A

It will operate with single and two stage heat pum ps and single and two stage furnaces . The AFE18-60A control will turn the heat pump unit off when the furnace is

turned on. An anti-short cycle feature initiates a 3 minute tim ed off delay when the

compressor goes off.

P1251305F P1251306F P1251307F P1251308F
N/A

Media Air Cleaner. A high efficiency air filtration device des igned to remove dirt, dus t, pollen and other m icroscopic particles from the air passing through it. Flexible perform ance range up to 2,000 CFM capacity. The air cleaner should be installed in the system so that all the system air is circulated through the air cleaner. The air cleaner will only rem ove the airborne contaminants delivered to it. Maxim um performance is obtained when the system blower is set for continuous operation. Carbon filters (optional) are available.

ASAS-10 ASAS-11 ASAS-12 ASAS-18

P1251301F P1251302F P1251303F P1251304F

Electronic Air Cleaner. The High-Efficiency Electronic Air Cleaner is des igned to remove air contam inants down to .01 microns. Carbon filters (optional) rem ove odors. Dual indicator lights show unit operation at a glance. Electronic proving switch cycles the air cleaner On/Off with the system fan. Durable powder-coat paint finish resists corros ion.

CFSB17 CFSB21 CFSB24

Counterflow Subbase Kit. For use with 34.5″ down flow furnace m odels. These kits

are available for the following furnace widths: 17.5″ wide (CFSB17), 21″ wide (CFSB21)

and 24.5″ wide (CFSB24). The kits m ust be used to prevent excessive temperature

N/A

from reaching com bustible m aterials, if the furnace is installed on a combustible floor.

This subbase effectively separated the furnace base and plenum from com bustible

m aterials. To ensure safe installation, do not install the counterflow floor base directly

on carpeting, tile, or other combustible material other than wood flooring.

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PRODUCT IDENTIFICATION

MODEL #

MFG #

DESCRIPTION

DCVK-20 (CVENT-2)
DCVK-30 (CVENT-3)

Concentric Vent Kit. This kit is designed to allow terminations of a direct vent furnace

N/A

to be “concentrically” vented through a wall or roof. This kit allows a single penetration

to support terminations for both the vent/flue and the com bustion air intake pipe.

EFR02

External Filter Rack Kit. For use with 34.5″ up flow gas furnaces. This kit is intended to

N/A

provide a location, external to the furnace casing for installation of a permanent filter. The rack is mounted over the indoor air blower compartment area of either side panel,

and provide filter retention as well as a location for attaching return air ductwork.

INSTALLATION CONSIDERATIONS

Safety Please adhere to the following warnings and cautions when installing, adjusting, altering, servicing, or operating the furnace.
WARNING
TO PREVENT PERSONAL INJURY OR DEATH DUE TO IMPROPER INSTALLATION,
ADJUSTMENT, ALTERATION, SERVICE OR MAINTENANCE, REFER TO THIS
MANUAL. FOR ADDITIONAL ASSISTANCE OR INFORMATION, CONSULT A
QUALIFIED INSTALLER, SERVICE AGENCY OR THE GAS SUPPLIER.
WARNING
THIS PRODUCT CONTAINS OR PRODUCES A CHEMICAL OR CHEMICALS WHICH
MAY CAUSE SERIOUS ILLNESS OR DEATH AND WHICH ARE KNOWN TO THE
STATE OF CALIFORNIA TO CAUSE CANCER, BIRTH DEFECTS OR OTHER
REPRODUCTIVE HARM.
WARNING
TO PREVENT POSSIBLE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH
DUE TO ELECTRICAL SHOCK, THE FURNACE MUST BE LOCATED TO PROTECT THE ELECTRICAL COMPONENTS FROM WATER.
Charge (ESD) Precautions NOTE: Discharge body’s static electricity before touching unit. An electrostatic discharge can adversely affect electrical components. Use the following precautions during furnace installation and servicing to protect the integrated control module from damage. By putting the furnace, the control, and the person at the same electrostatic potential, these steps will help avoid exposing the integrated control module to electrostatic discharge. This procedure is applicable to both installed and uninstalled (ungrounded) furnaces. 1. Disconnect all power to the furnace. Do not touch the
integrated control module or any wire connected to the control prior to discharging your body’s electrostatic charge to ground. 2. Firmly touch a clean, unpainted, metal surface of the furnace near the control. Any tools held in a person’s hand during grounding will be discharged. 3. Service integrated control module or connecting wiring following the discharge process in Step 2. Use caution not to recharge your body with static electricity; (i.e., do not move or shuffle your feet, do not touch ungrounded objects, etc.). If you come in contact with an ungrounded object, repeat Step 2 before touching control or wires. 4. Discharge any static electricity from your body to ground before removing a new control from its container. Follow Steps 1 through 3 if installing the control on a furnace. Return any old or new controls to their containers before touching any ungrounded object.

Product Application This product is designed for use as a residential home gas furnace. It is not designed or certified for use in mobile home, trailer, or recreational vehicle applications. This furnace can be used in the following non-industrial commercial applications: Schools, Office buildings, Churches, Retail stores, Nursing homes, Hotels/motels, Common or office areas. In all applications, the furnace must be installed per the installation instructions. Goodman® brand GSS9 and Amana® brand ASS9 furnaces are ETL certified. All furnaces are built for use with Natural gas but can be converted for use with LP gas. (NOTE: If using propane gas, a propane conversion kit is required). Goodman® brand GSS9 and Amana® brand ASS9 high efficiency furnaces are dual certified. Dual certification means that the combustion air inlet pipe is optional and the furnace can be vented as a:
Non-direct vent (single pipe) central forced air furnace in which combustion air is taken from the installation area or from air ducted from the outside or, Direct vent (dual pipe) central forced air furnace in which all combustion air supplied directly to the furnace burners through a special air intake system outlined in this manual and the installation instructions. To ensure proper installation, operation and servicing, thoroughly read the installation and service manuals for specifics pertaining to the installation, servicing and application of this product.
WARNING
POSSIBLE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH DUE TO FIRE,
EXPLOSION, SMOKE, SOOT, CONDENSTAION, ELECTRICAL SHOCK OR CARBON
MONOXIDE MAY RESULT FROM IMPROPER INSTALLATION, REPAIR, OPERATION,
OR MAINTENANCE OF THIS PRODUCT.
WARNING
TO PREVENT PROPERTY DAMAGE, PERSONAL INJURY OR DEATH DUE TO FIRE,
DO NOT INSTALL THIS FURNACE IN A MOBILE HOME, TRAILER, OR RECREATIONAL
VEHICLE.
To ensure proper furnace operation, install, operate, maintain and service the furnace in accordance with the installation, operation and service 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/CGA 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
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INSTALLATION CONSIDERATIONS

National Fire Protection Association

• Locate the 90% furnace so that the condensate can

1 Batterymarch Park Quincy, MA 02269

be piped at a downward slope away from the furnace to the drain. Do not locate the furnace or its condensate drainage system in any area subject to below

CSA International 8501 East Pleasant Valley

freezing temperatures without proper freeze protection. Refer to the Condensate Drain Lines and Trap section in this manual or the installation instructions

Cleveland, OH 44131

for further details.

• Set the 90% furnace on a level floor to enable proper

A copy of the CAN/CGA B149 Installation Codes can be obtained from:
CSA International
178 Rexdale Boulevard
Etobicoke, Ontario, Canada M9W, 1R3

condensate drainage. If the floor becomes wet or damp at times, place the furnace above the floor on a concrete base sized approximately 1-1/2″ larger than the base of the furnace. Refer to the Horizontal Applications and Considerations section in this manual or the installation instructions for leveling of horizontal

The rated heating capacity of the furnace should be greater

furnaces.

than or equal to the total heat loss of the area to be heated. · Ensure upflow or horizontal furnaces are not installed

The total heat loss should be calculated by an approved

directly on carpeting, or any other combustible mate-

method or in accordance with “ASHRAE Guide” or “Manual

rial. The only combustible material allowed is wood.

J-Load Calculations” published by the Air Conditioning Contractors of America.

A special accessory subbase must be used for upright counterflow unit installations over any combus-

Location Requirements and Considerations

tible material (including wood). Refer to subbase instructions for installation details. (NOTE: A subbase

will not be required if an air conditioning coil is located

WARNING

beneath the furnace between the supply air opening and the combustible floor.

TO PREVENT POSSIBLE EQUIPMENT DAMAGE, PROPERTY DAMAGE, PERSONAL

• Exposure to contaminated combustion air will result

INJURY OR DEATH, THE FOLLOWING BULLET POINTS MUST BE OBSERVED WHEN INSTALLING THE UNIT.

in safety and performance-related problems. Do not install the furnace where the combustion air is ex-

Follow the instructions listed below when selecting a fur-

posed to the following substances:

nace location. Refer also to the guidelines provided in the Combustion and Ventilation Air Requirements section in this manual or the installation instructions for details.
· Centrally locate the furnace with respect to the proposed or existing air distribution system.
· Ensure the temperature of the return air entering the furnace is between 55°F and 100°F when the furnace is heating.

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)

• If the furnace is installed in an application where the

printing inks

typical operating sound level of a furnace is deemed objectionable, an optional sound reduction kit is available. Consult your local distributor for more details.
· Provide provisions for venting combustion products outdoors through a proper venting system. Special consideration should be given to vent/flue pipe routing and combustion air intake pipe when applicable.

paint removers varnishes hydrochloric acid cements and glues antistatic fabric softeners for clothes dryers and masonry acid washing materials

90% Furnaces: Refer to the Vent/Flue Pipe and Com- · Isolate a nondirect furnace from an area contaminated

bustion Air Pipe -Termination Locations section in this

by any of the above substances. This protects the

manual or the installation instructions for appropriate

non-direct vent furnace from airborne contaminants.

termination locations. Also for 90% furnaces, refer to

To ensure that the enclosed non-direct vent furnace

the Vent/Flue Pipe and Combustion Air Pipe -Termi-

has an adequate supply of combustion air, vent from

nation Locations section in this manual or the instal-

a nearby uncontaminated room or from outdoors. Re-

lation instructions to determine if the piping system

fer to the Combustion and Ventilation Air Require-

from furnace to termination can be accomplished

ments section in this manual or the installation in-

within the guidelines given. NOTE: The length of flue

structions for details.

and/or combustion air piping can be a limiting factor

in the location of the furnace.
14

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INSTALLATION CONSIDERATIONS

• If the furnace is used in connection with a cooling unit, install the furnace upstream or in parallel with the cooling unit coil. Premature heat exchanger failure will result if the cooling unit coil is placed ahead of the furnace.
  · If the furnace is installed in a residential garage, position the furnace so that the burners and ignition source are located not less than 18 inches (457 mm) above the floor. Protect the furnace from physical damage by vehicles.
  · If the furnace is installed horizontally, the furnace access doors must be vertical so that the burners fire horizontally into the heat exchanger. Do not install the unit with the access doors on the “up/top” or “down/ bottom” side of the furnace.
  Clearances and Accessibility Installations must adhere to the clearances to combustible materials to which this furnace has been design certified. The minimum clearance information for this furnace is provided on the unit’s clearance label. These clearances must be permanently maintained. Refer to Specification Sheet for minimum clearances to combustible materials. Clearances must also accommodate an installation’s gas, electrical, and drain trap and drain line connections. If the alternate combustion air intake or vent/flue connections are used on a 90% furnace, additional clearances must be provided to accommodate these connections. Refer to Vent Flue Pipe and Combustion Air Pipe section in this manual or the installation instructions for details. NOTE: In addition to the required clearances to combustible materials, a minimum of 24 inches service clearance must be available in front of the unit.
  A furnace installed in a confined space (i.e., a closet or utility room) must have two ventilation openings with a total minimum free area of 0.25 square inches per 1,000 BTU/hr of furnace input rating. One of the ventilation openings must be within 12 inches of the top; the other opening must be within 12 inches of the bottom of the confined space. In a typical construction, the clearance between the door and door frame is usually adequate to satisfy this ventilation requirement.
  Furnace Suspension If suspending the furnace from rafters or joist, use 3/8″ threaded rod and 2″x2″x1/8″ angle iron as shown in the following figure. If the furnace is installed in a crawl space it must also be suspended from the floor joist or supported by a concrete pad. Never install the furnace on the ground or allow it to be exposed to water. The length of rod will depend on the application and the clearances necessary.

GAS PIPING
2″X2″X1/8″
ANGLE IRON
(3 PLACES)
90% Suspended Furnace Shown
EXISTING FURNACE REMOVAL NOTE: When an existing furnace is removed from a venting system serving other appliances, the venting system may be too large to properly vent the remaining attached appliances.
The following vent testing procedure is reproduced from the American National Standard/National Standard of Canada for Gas-Fired Central Furnaces ANSI Z21.47, latest edition, CSA-2.3b, latest edition Section 1.23.1.
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:
a. Seal any unused openings in the venting system; b. Inspect the venting system for proper size and horizontal pitch,
as required by the National Fuel Gas Code, ANSI Z223.1 or the CSA B149 Installation Codes and these instructions. Determine that there is no blockage or restriction, leakage, corrosion and other deficiencies which could cause an unsafe condition; c. In so far as practical, close all building doors and windows and all doors between the space in which the appliance(s) connected to the venting system are located and other spaces of the building. Turn on clothes dryers and any appliance not connected to the venting system. Turn on any exhaust fans, such as range hoods and bathroom exhausts, so they shall operate at maximum speed. Do not operate a summer exhaust fan. Close fireplace dampers; d. Follow the lighting instructions. Place the appliance being inspected in operation. Adjust thermostat so appliance shall operate continuously; e. Test for draft hood equipped spillage at the draft hood relief opening after 5 minutes of main burner operation. Use the flame of a match or candle; f. After it has been determined that each appliance connected to the venting system properly vents when tested as outlined above, return doors, windows, exhaust fans, fireplace dampers and any other gas burning appliance to their previous conditions of use;

1. If improper venting is observed during any of the above tests, the common venting system must be corrected.

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15

INSTALLATION CONSIDERATIONS

Corrections must be in accordance with the latest edition of the National Fuel Gas Code NFPA 54/ANSI Z223.1 and/or CSA B149 Installation Codes.
If resizing is required on any portion of the venting system, use the appropriate table in Appendix G in the latest edition of the National Fuel Gas Code ANSI Z223.1 and/or CSA B149
Installation Codes.

(Section 9.3), or CAN/CGA B149 Installation Codes (Sections 7.2, 7.3, or 7.4), or applicable provisions of the local building codes for determining the combustion air requirements for the appliances.
Most homes will require outside air be supplied to the furnace area by means of ventilation grilles or ducts connecting directly to the outdoors or spaces open to the outdoors such as attics or crawl spaces.

Thermostat Requirements
A high quality single stage thermostat with a “C” terminal is recommended to control the GSS9 and ASS9 furnace.

The following information on air for combustion and ventilation is reproduced from the National Fuel Gas Code NFPA 54/ANSI Z223.1 Section 9.3.
9.3* Air for Combustion and Ventilation.

Thermostat Location In an area having good air circulation, locate the thermostat about five feet high on a vibration-free inside wall. 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 and dehumidistat, such as an outside wall.

9.3.1 General.
9.3.1.1 Air for combustion, ventilation, and dilution of flue gases for appliances installed in buildings shall be obtained by application of one of the methods covered in 9.3.2 through 9.3.6. Where the requirements of 9.3.2 are not met, outdoor air shall be introduced in accordance with methods covered in 9.3.3 through 9.3.6.
Exception No. 1: This provision shall not apply to direct vent appliances.
9.3.1.2 Appliances of other than natural draft design and other than Category 1 vented appliances shall be provided with combustion, ventilation, and dilution air in accordance with the appliance manufacturer’s instructions.
9.3.1.3 Appliances shall be located so as not to interfere with proper circulation of combustion, ventilation, and dilution air.

COMBUSTION AND VENTILATION AIR REQUIREMENTS

9.3.1.4 Where used, a draft hood or a barometric draft regulator shall be installed in the same room or enclosure as the appliance served so as to prevent any difference in pressure between the hood or regulator and the combustion air supply.

WARNING
POSSIBLE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH MAY OCCUR
IF THE FURNACE IS NOT PROVIDED WITH ENOUGH FRESH AIR FOR PROPER
COMBUSTION AND VENTILATION OF FLUE GASES. MOST HOMES REQUIRE
OUTSIDE AIR BE SUPPLIED TO THE FURNACE AREA.
Improved construction and additional insulation in buildings have reduced heat loss by reducing air infiltration and escape around doors and windows. These changes have helped in reducing heating/cooling costs but have created a problem supplying combustion and ventilation air for gas fired and other fuel burning appliances. Appliances that pull air out of the house (clothes dryers, exhaust fans, fireplaces, etc.) increase the problem by starving appliances for air. When the furnace is installed as a direct vent (2-pipe) furnace, no special provisions for air for combustion are required. However, if this furnace is to be installed in the same space with other gas appliances, such as a water heater, ensure there is an adequate supply of combustion and ventilation air for the other appliances. Refer to the latest edition of the National Fuel Gas Code NFPA 54/ANSI Z223.1

9.3.1.5 Makeup air requirements for the operation of exhaust fans, kitchen ventilation systems, clothes dryers, and fireplaces shall be considered in determining the adequacy of a space to provide combustion air requirements.
9.3.2 Indoor Combustion Air. The required volume of indoor air shall be determined in accordance with the method in 9.3.2.1 or 9.3.2.2 except that where the air infiltration rate is known to be less than 0.40 ACH, the method in 9.3.2.2 shall be used. The total required volume shall be the sum of the required volume calculated for all appliances located within the space. Rooms communicating directly with the space in which the appliances are installed through openings not furnished with doors, and through combustion air openings sized and located in accordance with 9.3.2.3, are considered a part of the required volume.
9.3.2.1 Standard Method. The minimum required volume shall be 50 ft 3 per 1,000/Btu/hour (4.8m3/kW).
9.3.2.2 Known Air Infiltration Rate Method. Where the air infiltration rate of a structure is known, the minimum required volume shall be determined as follows:

16

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INSTALLATION CONSIDERATIONS

(1) For appliances other than fan-assisted, calculate using the following

equation: Required Volume other

( ) > _2_1ft3 __I_o_th_er ACH 1000 Btu/hr

(2) For fan-assisted appliances, calculate using the following equation:
( ) Required Volume > __1_5f_t3 ___I_f_an fan ACH 1000 Btu/hr

where:

I other

=

all appliances other than fan-assisted input in Btu per hour

9.3.3.1 Two Permanent Openings Method. Two permanent openings, one commencing within 12 in. (300 mm) of the top and one commencing within 12 in. (300 mm) of the bottom, of the enclosure shall be provided. The openings shall communicate directly, or by ducts, with the outdoors or spaces that freely communicate with the outdoors, as follows:
(1)* Where directly communicating with the outdoors or where communicating to the outdoors through vertical ducts, each opening shall have a minimum free area of 1 in.2/4000 Btu/hr (550 min2/kW) of total input rating of all appliances in the enclosure. [See Figure A.9.3.3.1(1)(a) and Figure A.9.3.3.1(1)(b).]

I fan = fan-assisted appliances input in Btu per hour ACH = air change per hour (percent of volume of space exchanged
per hour, expressed as a decimal)
(3) For purposes of this calculation, an infiltration rate greater than 0.60 ACH shall not be used in the equations in 9.3.2.2(1) and 9.3.2.2(2).
9.3.2.3 Indoor Opening Size and Location. Openings used to connect indoor spaces shall be sized and located in accordance with the following:
(1)*Combining spaces on the same story. Each opening shall have a minimum free area of 1 in.2/1000Btu/hr (2200 mm2/kW) of the total input rating of all appliances in the space but not less than 100 in.2 (0.60m2). One opening shall commence within 12 in. (300 mm) of the top, and one opening shall commence within 12 in. (300 mm) of the bottom, of the enclosure [see Figure A.9.3.2.3(1)]. The minimum dimension of air openings shall be not less than 3 in. (80 mm).

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

Chimney or Gas Vent

Opening

Water Furnace Heater

Opening

Alternate air inlet

Chimney or Gas Vent
Ventilation louvers (each end of attic)
NOTE: The inlet and outlet air openings must each have a free area of not less than one square inch per 4000 BTU of the total input rating of all equipment in the enclosure.
Outlet Air

Furnace

Water Heater

Inlet Air

Ventilation louvers for unheated crawl space

Figure A.9.3.3.1(1)(a) All Combustion Air From Outdoors Inlet Air from Ventilated Crawl Space and Outlet Air to Ventilated Attic.

Chimney or Gas Vent

Ventilation louvers (each end of attic)

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

Outlet Air

Furnace

Water Heater

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

Figure A.9.2.3.3.(1) All Combustion Air from Adjacent Indoor Spaces through Indoor Combustion Air Openings.
(2) Combining spaces in different stories. The volumes of spaces in different stories shall be considered as communicating spaces where such spaces are connected by one or more openings in doors or floors having a total minimum free area of 2 in.2/1000 Btu/hr (4400 mm2/kW) of total input rating of all appliances.

Figure A.9.3.3.1(1)(b) All Combustion Air From Outdoors through Ventilated Attic.
(2)* Where communicating with the outdoors through horizontal ducts, each opening shall have a minimum free area of 1 in.2/2000 Btu/hr (1100 min2/kW) of total input rating of all appliances in the enclosure. [See Figure A.9.3.3.1(2).]

9.3.3 Outdoor Combustion Air. Outdoor combustion air shall be provided through opening(s) to the outdoors in accordance with the methods in 9.3.3.1 or 9.3.3.2. The minimum dimension of air openings shall not be less than 3 in. (80 mm).

e

17

INSTALLATION CONSIDERATIONS

Chimney or Gas Vent

Outlet air duct

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

Water Furnace Heater

Inlet air duct

Figure A.9.3.3.1(2) All Combustion Air From Outdoors through Horizontal Ducts.
9.3.3.2* One Permanent Opening Method. One permanent openings, commencing within 12 in. (300 mm) of the top of the enclosure, shall be provided. The appliance shall have clearances of at least 1 in. (25 mm) from the sides and back and 6 in. (150 mm) from the front of the appliance. The opening shall directly communicate with the outdoors or shall communicate through a vertical or horizontal duct to the outdoors or spaces that freely communicate with the outdoors (see Figure A.9.3.3.2) and shall have a minimum free area of the following: (1) 1 in.2/3000 Btu/hr (700 mm2 per kW) of the total input rating of all
appliances located in the enclosure, and (2) Not less than the sum of the areas of all vent connectors in the
space.

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

Chimney or Gas Vent

Opening

(c) The minimum size of outdoor opening(s) shall be the full size of outdoor opening(s) calculated in accordance with 9.3.3, multiplied by the reduction factor. The minimum dimension of air openings shall not be less than 3 in. (80 mm).
9.3.5 Engineered Installations. Engineered combustion air installations shall provide an adequate supply of combustion, ventilation, and dilution air and shall be approved by the authority having jurisdiction.
9.3.6 Mechanical Combustion Air Supply. Where all combustion air is provided by a mechanical air supply system, the combustion air shall be supplied form outdoors at the minimum rate of 0.35 ft3/min per 1000 Btu/hr (0.034 m3/min per kW) for all appliances located within the space.
9.3.6.1 Where exhaust fans are installed, additional air shall be provided to replace the exhausted air.
9.3.6.2 Each of the appliances served shall be interlocked to the mechanical air supply system to prevent main burner operation where the mechanical air supply system is not in operation.
9.3.6.3 Where combustion air is provided by the building’s mechanical ventilation system, the system shall provide the specified combustion air rate in addition to the required ventilation air.
9.3.7 Louvers, Grilles, and Screens.
9.3.7.1 Louvers and Grilles. The required size of openings for combustion, ventilation, and dilution air shall be based on the net free area of each opening. Where the free area through a design of louver or grille or screen is known, it shall be used in calculating the size opening required to provide the free area specified. Where the louver and grille design and free area are not known, it shall be assumed that wood louvers will have 25 percent free area, and metal louvers and grilles will have 75 percent free area. Nonmotorized louvers and grilles shall be fixed in the open position.

Furnace

Water Heater

Alternate Opening Location

9.3.7.2 Minimum Scree Mesh Size. Screens shall not be smaller than 1/4 in. mesh.

Figure A.9.3.3.2 All Combustion Air From Outdoors through Single Combustion Air Opening.
9.3.4 Combination Indoor and Outdoor Combustion Air. The use of a combination of indoor and outdoor combustion air shall be in accordance with (1) through (3) (see example calculation in Annex J]:
(1) Indoor Openings: Where used, openings connecting the interior spaces shall comply with 9.3.2.3.
(2) Outdoor Opening(s) Location. Outdoor opening(s) shall be located in accordance with 9.3.3.
(3) Outdoor Opening(s) Size. The outdoor opening(s) size shall be calculated in accordance with the following: (a) The ratio of the interior spaces shall be the available volume of all communicating spaces divided by the required volume. (b) The outdoor size reduction factor shall be 1 minus the ratio of interior spaces.

9.3.7.3 Motorized Louvers. Motorized louvers shall be interlocked with the appliance so they are proven in the full open position prior to main burner ignition and during main burner operation. Means shall be provided to prevent the main burner form igniting should the louver fail to open during burner startup and to shut down the main burner if the louvers close during burner operation.
9.3.8 Combustion Air Ducts. Combustion air ducts shall comply with 9.3.8.1 through 9.3.8.8.
9.3.8.1 Ducts shall be constructed of galvanized steel or a material having equivalent corrosion resistance, strength, and rigidity.
Exception: Within dwellings units, unobstructed stud and joist spaces shall not be prohibited from conveying combustion air, provided that not more than one fireblock is removed.
9.3.8.2 Ducts shall terminate in an unobstructed space, allowing free movement of combustion air to the appliances.
9.3.8.3 Ducts shall serve a single space.

18

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INSTALLATION CONSIDERATIONS

9.3.8.4 Ducts shall not serve both upper and lower combustion air openings where both such openings are used. The separation between ducts servicing upper and lower combustion air openings shall be maintained to the source of combustion air.
9.3.8.5 Ducts shall not be screened where terminating in an attic space.
9.3.8.6 Horizontal upper combustion air ducts shall not slope downward toward the source of combustion air.
9.3.8.7 The remaining space surrounding a chimney liner, gas vent, special gas vent, or plastic piping installed within a masonry, metal, or factory built chimney shall not be used to supply combustion air.
Exception: Direct vent appliances designed for installation in a solid fuel- burning fireplace where installed in accordance with the manufacture’s installation instructions.
9.3.8.8 Combustion air intake openings located on the exterior of the building shall have the lowest side of the combustion air intake openings located at least 12 in. (300 mm) vertically from the adjoining grade level.

section in the installation instructions for details concerning the conversion to the alternate vent/flue and combustion air connections on the 90% furnace.
The 34.5″ single stage furnace is one of the products in our newly redesigned line of shorter chassis furnaces. It is available in 92% / 96% AFUE up flow / horizontal model and a down flow / horizontal model.
The up flow / horizontal 34.5″ single stage furnace is available in the following models:
MSS920402BNAA
MSS920603BNAA
MSS9S0803BNAA
MSS920804CNAA
MSS920805CNAA
MSS921004CNAA
MSS921005CNAA
MSS921205DNAA

Horizontal Applications and Considerations Horizontal applications, in particular, may dictate many of the installation’s specifics such as airflow direction, ductwork connections, flue and/or combustion air pipe connections, etc. The basic application of this furnace as a horizontal furnace differs only slightly from an upright installation. When installing a furnace horizontally, additional consideration must be given to the following:
Drain Trap and Lines In horizontal applications the condensate drain trap is secured to the furnace side panel, suspending it below the furnace. A minimum clearance of 5.5″ below the furnace must be provided for the drain trap. Additionally, the appropriate downward piping slope must be maintained from the drain trap to the drain location. Refer to Condensate Drain Trap and Lines section in this manual or the installation instructions for further details. If the drain trap and drain line will be exposed to temperatures near or below freezing, adequate measures must be taken to prevent condensate from freezing. NOTE: The use of insulation and/or heat tape is recommended. Failure to provide proper condensate drainage can result in property damage.
Leveling Leveling ensures proper condensate drainage from the heat exchanger and induced draft blower. For proper flue pipe drainage, the furnace must be level lengthwise from end to end. The furnace should also be level from back to front or have a slight tilt with the access doors downhill (approximately 3/4″) from the back panel. The slight tilt allows the heat exchanger condensate, generated in the recuperator coil, to flow forward to the recuperator coil front cover.
In horizontal installations with the furnace laying on the left hand side, the alternate vent connection may be used. In this configuration the internal elbow is removed. The standard piping connections may also be used in these positions. Refer to Vent/Flue Pipe and Combustion Air Pipe

MSS960402BNAA MSS960603BNAA MSS960803BNAA MSS960804CNAA MSS960805CNAA MSS961005CNAA MSS961205DNAA The down flow / horizontal 34.5″ single stage furnace is available in the following models. CSS920402BNAA CSS920603BNAA CSS920804CNAA CSS921005CNAA CSS960402BNAA CSS960603BNAA CSS960804CNAA CSS961005CNAA CSS961205CNAA
19

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INSTALLATION CONSIDERATIONS

AIR DISCHARGE

Propane Gas and/or High Altitude Installations

WARNING

Side Return Duct Connection

Side Return Duct Connection

Bottom Return Duct Connection

UPFLOW UPRIGHT

Bottom Return Duct Connection
UPFLOW HORIZONTAL LEFT AIR DISCHARGE

Bottom Return Duct Connection

AIR DISCHARGE

COUNTERFLOW HORIZONTAL RIGHT AIR DISCHARGE

AIR DISCHARGE
UPFLOW HORIZONTAL RIGHT AIR DISCHARGE

AIR DISCHARGE

Bottom Return Duct Connection

COUNTERFLOW HORIZONTAL LEFT AIR DISCHARGE

90% Furnace Recommended Installation Positions

POSSIBLE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH MAY OCCUR IF THE CORRECT CONVERSION KITS ARE NOT INSTALLED. THE APPROPRIATE KITS MUST BE APPLIED TO INSURE SAFE AND PROPER FURNACE OPERATION. ALL
CONVERSIONS MUST BE PERFORMED BY A QUALIFIED INSTALLER OR SERVICE
AGENCY.
This furnace is shipped from the factory configured for natural gas at standard altitude. Propane gas installations require an orifice change to compensate for the energy content difference between natural and propane gas. High altitude installations may require both a pressure switch and an orifice change. These changes are necessary to compensate for the natural reduction in the density of both the gas fuel and the combustion air at higher altitude. Refer to the Accessories Charts in this manual or product Specification Sheet for a tabular listing of appropriate manufacturer’s kits for propane gas and/or high altitude installations. The indicated kits must be used to insure safe and proper furnace operation. All conversions must be performed by a qualified installer, or service agency.
VENT/FLUE PIPE AND COMBUSTION AIR PIPE

NOTE: Alternate “vertical” piping connections can not be used when an upflow 90% furnace is installed with supply air discharging to the right or when a counterflow furnace is installed with supply discharging to the left. In this case, use the standard flue and combustion air piping connections
Alternate Electrical and Gas Line Connections Furnaces have provisions allowing for electrical and gas line connections through either side panel. In horizontal applications the connections can be made either through the “top” or “bottom” of the furnace.

WARNING
FAILURE TO FOLLOW THESE INSTRUCTIONS CAN RESULT IN BODILY INJURY OR DEATH. CAREFULLY READ AND FOLLOW ALL INSTRUCTIONS GIVEN IN THIS
SECTION.
WARNING
UPON COMPLETION OF THE FURNACE INSTALLATION, CAREFULLY INSPECT THE
ENTIRE FLUE SYSTEM BOTH INSIDE AND OUTSIDE THE FURNACE TO ASSURE IT
IS PROPERLY SEALED. LEAKS IN THE FLUE SYSTEM CAN RESULT IN SERIOUS
PERSONAL INJURY OR DEATH DUE TO EXPOSURE TO FLUE PRODUCTS, INCLUDING CARBON MONOXIDE.

Drain Pan A drain pan must be provided if the furnace is installed above a conditioned area. The drain pan must cover the entire area under the furnace (and air conditioning coil if applicable).
Freeze Protection If the drain trap and drain line will be exposed to temperatures near or below freezing, adequate measures must be taken to prevent condensate from freezing. NOTE: The use of insulation and/or heat tape is recommended. Failure to provide proper condensate drainage can result in property damage.
20

A condensing gas furnace achieves its high level of efficiency by extracting almost all of the heat from the products of combustion and cooling them to the point where condensation takes place. Because of the relatively low flue gas temperature and water condensation requirements, PVC pipe is used as venting material.
This furnace must not be connected to Type B, BW, or L vent or vent connector, and must not be vented into any portion of a factory built or masonry chimney except when used as a pathway for PVC as described later in this section. Never common vent this appliance with another appliance or use a vent which is used by a solid fuel appliance.
It is the responsibility of the installer to follow the manufacturers’ recommendations and to verify that all vent/flue piping and connectors are compatible with furnace flue products. Additionally, it is the responsibility of the installer to

e

INSTALLATION CONSIDERATIONS

ensure that all piping and connections possess adequate structural integrity and support to prevent flue pipe separation, shifting, or sagging during furnace operation.
Dual Certification: Non-Direct/Direct Vent (90% Furnaces Only) The 90% furnace is dual certified and may be installed as a non-direct vent (single pipe) or direct vent (dual pipe) appliance. A non-direct vent installation requires only a vent/ flue pipe. A direct vent installation requires both a vent/ flue pipe and a combustion air intake pipe. Refer to the appropriate section for details concerning piping size, length, number of elbows, furnace connections, and terminations.
WARNING
TO AVOID BODILY INJURY, FIRE OR EXPLOSION, SOLVENT CEMENTS MUST BE
KEPT AWAY FROM ALL IGNITION SOURCES (I.E., SPARKS, OPEN FLAMES, AND
EXCESSIVE HEAT) AS THEY ARE COMBUSTIBLE LIQUIDS. AVOID BREATHING
CEMENT VAPORS OR CONTACT WITH SKIN AND/OR EYES.

create a nuisance or hazard or could be detrimental to the operation of regulators, relief valves, or other equipment.
· The combustion air intake termination of a direct vent application should not terminate in an area which is frequently dusty or dirty.
NOTE: In Canada, the B149 Fuel Gas Code takes precedence over the preceding termination restrictions.
Direct Vent Installations On upflow units secure the combustion air intake pipe directly to the air intake coupling. On counterflow units secure the combustion air intake pipe to the air intake coupling using the rubber coupling and worm gear hose clamps provided with the unit. The counterflow rubber coupling allows service removal of air intake piping internal to the furnace blower compartment. The combustion air intake pipe can also be secured directly to the counterflow unit air intake pipe coupling.

Precautions should be taken to prevent condensate from freezing inside the vent/flue pipe and/or at the vent/flue pipe termination. It is our recommendation that all vent/flue piping exposed to temperatures below 35°F for extended periods of time should be insulated with 1/2″ thick closed cell foam. Also all vent/flue piping exposed outdoors in excess of the terminations shown in this manual (or in unheated areas) should be insulated with 1/2″ thick closed cell foam. Inspect piping for leaks prior to installing insulation.

Non-Direct Vent Installations A minimum of one 90° elbow must be installed on the com-
bustion air intake “coupling” to guard against inadvertent
blockage.

The following bullets and diagram describe the restrictions concerning the appropriate location of vent/flue pipe and combustion air intake pipe (when applicable) terminations. Refer to the installation instructions for specific details on termination construction.
· All terminations must be located at least 12 inches above ground level or the anticipated snow level.
· Vent terminations must terminate at least 3 feet above any forced air inlet located within 10 feet.
NOTE: This provision does not apply to the combustion air intake termination of a direct vent application.
· The vent termination of a non-direct vent application must terminate at least 4 feet below, 4 feet horizontally from, or 1 foot above any door, window, or gravity air inlet into any building.
· The vent termination of a direct vent application must terminate at least 12 inches from any opening through which flue gases may enter a building (door, window, or gravity air inlet).
· The vent termination of vent pipe run vertically through a roof must terminate at least 12 inches above the roof line (or the anticipated snow level) and be at least 12 inches from any vertical wall (including any anticipated snow build up).
· A vent termination shall not terminate over public walkways or over an area where condensate or vapor could

WARNING
THE RUBBER ELBOW IS NOT DESIGNED TO SUPPORAT A LOAD. WHEN THE
RUBBER ELBOW IS MOUNTED EXTERNALLY TO THE FURNACE CABINET, EXTREME CARE MUST BE TAKEN TO ADEQUATELY SUPPORT FIELD-SUPPLIED VENT/FLUE PIPING, AS DAMAGE CAN RESULT IN LEAKS CAUSING BODILY INJURY OR DEATH DUE TO EXPOSURE TO FLUE GASES, INCLUDING CARBON MONOXIDE.
CAUTION
BE SURE NOT TO DAMAGE INTERNAL WIRING OR OTHER COMPONENTS WHEN
REINSTALLING COUPLING AND SCREWS.
Vent/Flue Pipe Lengths and Diameters Refer to the following tables for applicable length, elbows, and pipe diameter for construction of the vent/flue pipe system of a non-direct vent installation. In addition to the vent/ flue pipe, a single 90° elbow must be secured to the combustion air intake to prevent inadvertent blockage. The tee or elbows used in the vent/flue termination must be included when determining the number of elbows in the piping system.

21

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INSTALLATION CONSIDERATIONS

• M SS9 / CSS9 Direct Vent (2-Pipe) & Non-Direct Vent (1-Pipe) (6)
  M aximum allow able Length of Vent/ Flue Pipe & Combustion Air Pipe (Ft) (1) (2)

M odel

Number of Elbows (3) (5)

Pipe

1

2

3

4

5

6

7

8

Size

• M SS9 0 402BNA

2″ 145 140 135 130 125 120 115 110 3″ 238 231 224 217 210 203 196 189

• M SS9 0 603BNA

2″ 220 215 210 205 200 195 190 185 3″ 224 217 210 203 196 189 182 175

• M SS9 0 803BNA

2″ 95 90 85 80 75 70 65 60 3″ 238 231 224 217 210 203 196 189

• M SS9 0 804CNA

2″ 95 90 85 80 75 70 65 60 3″ 238 231 224 217 210 203 196 189

Vent/Flue Pipe Terminations The vent/flue pipe may terminate vertically, as through a roof, or horizontally, as through an outside wall. Vertical vent/flue pipe termination should be as shown in the following figures. Refer to Vent/Flue Pipe and Combustion Air Pipe – Termination Locations section in this manual or the installation instructions for details concerning location restrictions. The penetration of the vent through the roof must be sealed tight with proper flashing such as is used with a plastic plumbing vent.
NOTE: Terminate both pipes in the same pressure zone (same side of roof, no major obstacles between pipes, etc.).

• M SS9 0 805CNA

2″ 45 40 35 30 25 20 15 10 3″ 217 210 203 196 189 182 175 168

• M SS92100 4CNA* 2″ 45 40 35 30 25 20 15 10

• M SS92100 5CNA*

• M SS96100 5CNA* 3″ 217 210 203 196 189 182 175 168

• M SS9 1 205DNA 3″ 238 231 224 217 210 203 196 189

COMBUSTION AIR INTAKE (OPTIONAL)
*Not required for single pipe installation

TEE (OPTIONAL) 12″ MIN HEIGHT DIFFERENCE BETWEEN INTAKE AND VENT

M odel

Pipe

1

2

3

4

5

6

7

8

Size

• CSS9 0402BNA

2″ 145 140 135 130 125 120 115 110 3″ 238 231 224 217 210 203 196 189

• CSS9 0603BNA

2″ 120 115 110 105 100 95 90 85 3″ 224 217 210 203 196 189 182 175

• CSS9 0804CNA

2″ 95 90 85 80 75 70 65 60 3″ 238 231 224 217 210 203 196 189

• CSS9 1005CNA CSS9 1205DNA*

2″ 25 20 15 10 5 n/a n/a n/a 3″ 238 231 224 217 210 203 196 189 3″ 238 231 224 217 210 203 196 189

ROOF LINE 12″ MIN TO ROOF OR HIGHEST ANTICIPATED SNOW LEVEL

96″ MAX. – 3″ MIN.

1. Maximum allowable limits listed on individual lengths for inlet and flue and NOT a combination.
2. Minimum requirement for each vent pipe is five (5) feet in length and one elbow/tee.
3. Tee used in the vent/flue termination must be included when determining the number of elbows in the piping system.
4. 2 1/2″ or 3″ diameter pipe can be used in place of 2″ diameter pipe.
5. Increased Clearance Configurations using (2) 45 deg. Long Sweep elbows should be considered equivalent to one 90 deg. elbow.
6. One 90° elbow should be secured to the combustion air intake connection.
   Vent/Flue and Combustion Air Pipe Lengths and Diam-
   eters Refer to the preceding table for applicable length, elbows, and pipe diameter for construction of the vent/flue and combustion air intake pipe systems of a non-direct vent (single pipe) installation. The number of elbows tabulated represents the number of elbows and/or tees in each (Vent/Flue & Combustion Air Intake) pipe. Elbows and/or tees used in the terminations must be included when determining the number of elbows in the piping systems. If the combustion air intake pipe is to be installed above a finished ceiling or other area where dripping of condensate will be objectionable, insulation of the combustion air pipe may be required. Use 1/2″ thick closed cell foam insulation such as Armaflex or Insultube where required.

STRAIGHT

ELBOWS

Horizontal vent/flue pipe terminations should be as shown in the following figure. Refer to Vent/Flue Pipe and Combustion Air Pipe – Termination Locations section in this manual or the installation instructions for details concerning location restrictions. A 2 3/8″ diameter wall penetration is required for 2″ diameter pipe while a 3 1/2″ diameter hole is required for 3″ diameter pipe. To secure the pipe passing through the wall and prohibit damage to piping connections, a coupling should be installed on either side of the wall and solvent cemented to a length of pipe connecting the two couplings. The length of pipe should be the wall thickness plus the depth of the socket fittings to be installed on the inside and outside of the wall. The wall penetration should be sealed with silicone caulking material.

22

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INSTALLATION CONSIDERATIONS
12″ MIN.
VENT/FLUE TEE (OPTIONAL) or
45° ELBOW TURNED DOWN or 90° ELBOW TURNED
DOWN
12″ MIN. ABOVE HIGHEST ANTICIPATED
SNOW LEVEL

90° ELBOWS
3″-24″ BETWEEN PIPES

Horizontal Termination (Single Pipe) Above Highest Anticipated Snow Level
10″- 24″

12″ MIN. ABOVE HIGHEST ANTICIPATED
SNOW LEVEL
Combustion Air Intake may also be snorkeled to obtain 12″ min ground clearance.
Alternate Vent Termination Above Anticipated Snow Level (Dual Pipe)
12″ MINIMUM

6″ MAX 4″ MIN

VENT/FLUE TEE OR
90° ELBOW TURNED DOWN

90º OR 45° ELBOW

12″ MIN. TO GRADE OR HIGHEST ANTICIPATED
SNOW LEVEL

12″ MINIMUM ABOVE HIGHEST ANTICIPATED
SNOW LEVEL

Standard Horizontal Terminations (Dual Pipe)
90° ELBOWS
3″ – 24″
12″ MIN. ABOVE HIGHEST ANTICIPATED
SNOW LEVEL
Alternate Horizontal Vent Termination (Dual Pipe)

90% Furnace Horizontal Termination (Single Pipe) Above Highest Anticipated Snow Level
In a basement installation, the vent/flue pipe can be run between joist spaces. If the vent pipe must go below a joist and then up into the last joist space to penetrate the header, two 45° elbows should be used to reach the header rather than two 90° elbows.
Direct Vent (Dual Pipe) Piping Direct vent installations require both a combustion air intake and a vent/flue pipe. The pipes may be run horizontally and exit through the side of the building or run vertically and exit through the roof of the building. The pipes may be run through an existing unused chimney; however, they must extend a minimum of 12 inches above the top of the chimney. The space between the pipes and the chimney must be closed with a weather tight, corrosion resistant flashing. Both the combustion air intake and a vent/flue pipe terminations must be in the same atmospheric pressure zone. Refer to Vent/Flue and Combustion Air Pipe – Termination Lo-
23

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INSTALLATION CONSIDERATIONS

cations or Concentric Vent Termination section in this manual or the installation instructions for specific details on termination construction.
Concentric Vent Kits (DCVK) Application
The DCVK-20 and DCVK-30 kit is designed to allow the terminations of a direct vent furnace to be “concentrically” vented through a wall or roof. This kit allows a single penetration to support terminations for both the vent/flue pipe and the combustion air intake pipe.
(DCVK) Vent Termination Clearances
1. Determine termination locations based on clearances specified in furnace installation instructions, and following steps as shown in Figures 1,3,6,7,8 and 9.

These kits are for vertical or horizontal termination of the combustion air inlet and the exhaust vent pipes on Category IV gas-fired condensing furnaces. The DCVK-30 kit can be used for 3″ diameter pipe systems. The DCVK-20 kit can be used for the 2″ diameter pipe system. For the correct pipe size for the furnace. Both the combustion air inlet and the exhaust vent pipes must attach to the termination kit. The termination kit must terminate outside the structure and must be installed per the instructions outlined below for vertical or horizontal termination. Vertical termination is preferred. Field supplied pipe and fittings are required to complete the installation.

9″
12″
D irec t Ve nt Term ina l
5 0 ,0 0 0 B tu h or les s

3′

G R AD E

12″

12 ” Forc e d A ir Inlet

D irec t Vent T erm inal M o re th a n 5 0 ,0 0 0 B tu h
FIGURE 1 2. The vent termination must be located at least 12″ above
ground or normally expected snow accumulation levels.

TABLE 1 1. Determine the best location for the termination kit. Roof
termination is preferred since it is less susceptible to damage, has reduced intake contaminants and less visible vent vapors. For side termination, consideration should be given to:
a. Possible damage from the vapors to plants/shrubs, other equipment and building materials
b. Possible damage to the terminal from foreign objects
c. Wind effects that may cause recirculation of flue products, debris or light snow
d. Visible vent vapors.
Vent

3. Do NOT terminate over public walkways. Avoid areas where condensate may cause problems such as above planters, patios, or adjacent to windows where steam may cause fogging.
   4. The vent termination shall be located at least 4′ horizontally from any electric meter, gas meter, regulator and any relief equipment. These distances apply ONLY to U.S. Installations.

Combustion Air
Roof Boot/Flashing (Field Supplied)

Maintain 12″ (18″ for Canada) minimum clearance above highest anticipated snow level. Maximum of 24″ above roof.
Support (Field Supplied)

5. The vent termination shall be located at least 3′ above any forced air inlet located within 10′; and at least 10′ from a combustion air intake of another appliance, except another direct vent furnace intake.
6. In Canada, the Canadian Fuel Gas Code takes precedence over the preceding termination instructions.

3″ or 4″ Diameter SDR-26 Pipe

2 or 2 1/2″ Diameter SDR-26 Pipe

Vent

45 Elbow (Field Supplied)
Combustion Air

FIGURE 3

24

2″ or 3″ Diameter Y Concentric Fitting
FIGURE 2

2″ or 3″ Diameter Rain Cap

e

INSTALLATION CONSIDERATIONS

WARNING
DO NOT OPERATE THE FURNACE WITH THE RAIN CAP REMOVED AS RECIRUCLATION OF THE FLUE GASES MAY OCCUR. WATER MAY ALSO
COLLECT INSIDE THE LARGER COMBUSTIN AIR PIPE AND FLOW TO THE
BURNER ENCLOSURE. FAILURE TO FOLLOW THIS WARNING CAN RESULT IN
PROPERTY DAMAGE, EQUIPMENT DAMAGE, PERSONAL INJURY OR DEATH.
Concentric Sidewall Vent Kit (0170K00000S) This (sidewall only) vent kit is to be used with 2″ – 3″ vent systems. The vent kit must terminate outside the structure and may be installed with the intake and exhaust pipes located side- by side or with one pipe above the other. This kit is NOT intended for use with single pipe (non-direct vent) installations.
Condensate Drain Lines and Drain Trap A condensing gas furnace achieves its high level of efficiency by extracting almost all of the heat from the products of combustion and cooling them to the point where condensation takes place. The condensate which is generated must be piped to an appropriate drain location.

Drain Information for Horizontal Installations NOTE: Horizontal installations require 5.5″ under the furnace to accommodate the drain trap. The horizontal furnace must be installed with ¾” slope from back to front to permit condensate flow towards the front of the furnace. When installing a MSS9 horizontally with the left side down, there are two options for connecting the vent pipe to the furnace.
Option 1 Venting may be connected to the furnace vent pipe fitting on the original top (now the end) of the furnace.
Option 2 The internal vent pipe and elbow may be removed from the furnace to permit the vent to exit the top (original side) of the furnace. If this option is used, an RF000142 Vent-Drain coupling must be used to keep condensate from collecting in the inducer assembly. To install the drain, refer to the following instructions and illustration. 1. Remove screws from vent flange.
2. Remove internal elbow and vent pipe.
3. Cut pipe 2 1/2″ from flange.
4. Remove cabinet plug adjacent to inducer outlet and install an original cabinet vent hole.
5. Install RF000142 coupling on inducer outlet.
6. Install flanged vent section removed in step 2 and secure with clamps.
7. Secure flange to cabinet using screws removed in step 1.
Insert f lange. Cut 2 ½” long.
RF000142

WARNING
IN UPRIGHT UPFLOW INSTALLATIONS, THE DRAIN TRAP MUST BE MOUNTED ON THE OPPOSITE SIDE OF THE UNIT FROM THE JUNCTION BOX. THIS WILL
REDUCE THE RISK OF WATER REACHING THE JUNCTION BOX IN THE EVENT OF
A BLOCKED DRAIN CONDITION. FAILURE TO FOLLOW THESE INSTRUCTIONS
CAN RESULT IN POSSIBLE PROPERTY DAMAGE, PERSONAL INJURY, OR DEATH DUE TO ELECTRICAL SHOCK.
· If the drain line is routed through an area which may see temperatures near or below freezing, precautions must be taken to prevent condensate from freezing within the drain line.
· If an air conditioning coil is installed with the furnace, a common drain may be used. An open tee must be installed in the drain line, near the cooling coil, to relieve positive air pressure from the coil’s plenum. This is necessary to prohibit any interference with the function of the furnace’s drain trap.
25
e

INSTALLATION CONSIDERATIONS

In some areas the gas supplier may artificially derate the gas in an effort to compensate for the effects of altitude. If

the gas is artificially derated, the appropriate orifice size must be determined based upon the BTU/ft3 content of the derated gas and the altitude. Refer to the National Fuel

Gas Code, NFPA 54/ANSI Z223.1, and information provided by the gas supplier to determine the proper orifice

size.

A different pressure switch may be required at high altitude

regardless of the BTU/ft3 content of the fuel used. Refer to the product Specification Sheet or Technical Manual for a

tabular listing of appropriate altitude ranges and corresponding manufacturer’s pressure switch kits.

GAS SUPPLY AND PIPING The furnace rating plate includes the approved furnace gas
input rating and gas types. The furnace must be equipped to

PROPANE GAS CONVERSION

operate on the type of gas applied. This includes any conversion kits required for alternate fuels and/or high altitude.

WARNING

CAUTION
TO PREVENT UNRELIABLE OPERATION OR EQUIPMENT DAMAGE, THE INLET
GAS SUPPLY PRESSURE MUST BE AS SPECIFIED ON THE UNIT RATING PLATE
WITH ALL OTHER HOUSEHOLD GAS FIRED APPLIANCES OPERATING.
Inlet gas supply pressures must be maintained within the ranges specified below. The supply pressure must be constant and available with all other household gas fired appliances operating. The minimum gas supply pressure must be maintained to prevent unreliable ignition. The maximum must not be exceeded to prevent unit overfiring.
INLET GAS SUPPLY PRESSURE Natural Gas Minimum: 4.5″ w.c. Maximum: 10.0″ w.c.
Propane Gas Minimum: 11.0″ w.c. Maximum: 13.0″ w.c.
HIGH ALTITUDE DERATE When this furnace is installed at high altitude, the appropriate High Altitude orifice kit must be applied. This is required due to the natural reduction in the density of both the gas fuel and combustion air as altitude increases. The kit will provide the proper design certified input rate within the specified altitude range. High altitude kits are purchased according to the installation altitude and usage of either natural or propane gas. Refer to the product Specification Sheet or Technical Manual for a tabular listing of appropriate altitude ranges and corresponding manufacturer’s high altitude (Natural, Propane gas, and/ or Pressure Switch) kits. Do not derate the furnace by adjusting the manifold pressure to a lower pressure than specified on the furnace rating plate. The combination of the lower air density and a lower manifold pressure will prohibit the burner orifice from drawing the proper amount of air into the burner. This may cause incomplete combustion, flashback, and possible yellow tipping.

POSSIBLE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH MAY OCCUR IF THE CORRECT CONVERSION KITS ARE NOT INSTALLED. THE APPROPRIATE KITS MUST BE APPLIED TO INSURE SAFE AND PROPER FURNACE OPERATION. ALL
CONVERSIONS MUST BE PERFORMED BY A QUALIFIED INSTALLER OR SERVICE
AGENCY.
This unit is configured for natural gas. The appropriate manufacturer’s propane gas conversion kit, must be applied for propane gas installations. *SS9 models using a White-Rodgers 36J22 single stage valve use LPM-07 LP Conversion Kit.
GAS VALVE This unit is equipped with a 24 volt gas valve controlled during furnace operation by the integrated control module. As shipped, the valve is configured for natural gas. The valve is field convertible for use with propane gas by using the appropriate propane gas conversion kit. Taps for measuring the gas supply pressure and manifold pressure are provided on the valve.
NOTE: The gas supply pressure on White-Rodgers “J” model gas valve, used on single stage furnaces, can be checked with a gas pressure test kit (Part

0151K00000S) available through our authorized distributors. The gas valve has

a manual ON/OFF control located on the valve itself. This control may be set only to the “ON” or “OFF” position. Refer to the Lighting Instructions Label or the “Putting the Furnace Into Operation” section of this manual or the installation instructions for use of this control during start up and shut down periods.
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 NEEDED WHEN RUNNING PIPE FROM THE
METER/TANK TO THE FURNACE.

26

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INSTALLATION CONSIDERATIONS

The gas piping supplying the furnace must be properly sized based on the gas flow required, specific gravity of the gas, and length of the run. The gas line installation must comply with local codes, or in their absence, with the latest edition of the National Fuel Gas Code, NFPA 54/ANSI Z223.1.

Natural Gas Capacity of Pipe

Length of Pipe in Feet
10 20 30 40 50 60 70 80 90 100

In Cubic Feet of Gas Per Hour (CFH)

Nominal Black Pipe Size

1/2″

3/4″

1″

1 1/4″

132

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

(Pressure 0.5 psig or less and pressure drop of 0.3″ W.C.; Based on 0.60 Specific Gravity Gas)

CFH =

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

To connect the furnace to the building’s gas piping, the installer must supply a ground joint union, drip leg, manual shutoff valve, and line and fittings to connect to gas valve. In some cases, the installer may also need to supply a transition piece from 1/2″ pipe to a larger pipe size.
The following stipulations apply when connecting gas piping. Refer to the following figures for typical gas line connections to the furnace.
1. Use black iron or steel pipe and fittings for the building piping.
2. Use pipe joint compound on male threads only. Pipe joint compound must be resistant to the action of the fuel used.
3. Use ground joint unions.
4. Install a drip leg to trap dirt and moisture before it can enter the gas valve. The drip leg must be a minimum of three inches long.
5. Install a 1/8″ NPT pipe plug fitting, accessible for test gage connection, immediately upstream of the gas supply connection to the furnace.
6. Use two pipe wrenches when making connection to the gas valve to keep it from turning. The orientation of the gas valve on the manifold must be maintained as shipped from the factory.
7. Install a manual shutoff valve between the gas meter and unit within six feet of the unit. If a union is installed, the union must be downstream of the manual shutoff valve, between the shutoff valve and the furnace.
8. Tighten all joints securely.

GAS PIPING CHECKS Before placing unit in operation, leak test the unit and gas connections.
WARNING
TO AVOID THE POSSIBLITY OF EXPLOSION OR FIRE, NEVER USE A MATCH
OR OPEN FLAME TO TEST FOR LEAKS.
Check for leaks using an approved chloride-free soap and water solution, an electronic combustible gas detector, or other approved testing methods. NOTE: Never exceed specified pressures for testing. Higher pressure may damage the gas valve and cause subsequent overfiring, resulting in heat exchanger failure. Disconnect this unit and shutoff valve from the gas supply piping system before pressure testing the supply piping system with pressures in excess of 1/2 psig (3.48 kPa). Isolate this unit from the gas supply piping system by closing its external manual gas shutoff valve before pressure testing supply piping system with test pressures equal to or less than 1/2 psig (3.48 kPa).
PROPANE GAS TANKS AND PIPING
WARNING
PROPANE GAS IS HEAVIER THAN AIR AND ANY LEAKING GAS CAN SETTLE IN ANY LOW AREAS OR CONFINED SPACES. TO PREVENT PROPERTY DAMAGE,
PERSONAL INJURY, OR DEATH DUE TO FIRE OR EXPLOSION CAUSED BY A
PROPANE GAS LEAK, INSTALL A GAS DETECTION WARNING DEVICE.
A gas detecting warning system is the only reliable way to detect a propane gas leak. Iron oxide (rust) can reduce the level of odorant in propane gas. Do not rely on your sense of smell. Contact a local propane gas supplier about installing a gas detecting warning system. If the presence of gas is suspected, follow the instructions on this page. 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 inch WC at the furnace manifold with all gas appliances in operation. Maintaining proper gas pressure depends on three main factors: 1. Vaporization rate, depending on temperature of the liq-
uid, and “wetted surface” area of the container or containers. 2. Proper pressure regulation. (Two-stage regulation is recommended for both cost and efficiency). 3. Pressure drop in lines between regulators, and between second stage regulator and the appliance. Pipe size will depend on length of pipe run and total load of all appliances. Complete information regarding tank sizing for vaporization, recommended regulator settings, and pipe sizing is avail-

27

e

INSTALLATION CONSIDERATIONS

able from most regulator manufacturers and propane gas suppliers.
Use pipe dope approved for use with L.P. gas.

Sizing Betw een First and Second Stage Regulator*
Maximum Propane Capacities listed are based on 2 psig pressure drop at 10 psig setting. Capacities in 1,000 BTU/hour.

Refer to the following illustration for typical propane gas installations and piping.

First Stage Regulator

5 to 15 PSIG (20 PSIG Max.)

Continuous 11″ W.C.

200 PSIG Maximum

Second Stage Regulator

Pipe or T u b in g Le ngth
Feet
10 20 30 40 50 60 80 100 125 150 175 200

Tubing S ize , O . D. Type L

3/8″ 730 500 400 370 330 300 260 220 200 19 0 17 0 16 0

1/ 2 ” 1,700 1,10 0 920 850 770 700 6 10 540 490 430 400 380

5/8″ 3,200
220 2,000 1,700 1,500 1,300 1,200 1,000
900 830 780 730

3/4″ 5,300 3,700 2,900 2,700 2,400 2,200 1,900 1,700 1,400 1,300 1,200 1,100

7/8″ 8,300 5,800 4,700 4 ,10 0 3,700 3,300 2,900 2,600 2,300 2 ,10 0 1,9 0 0 1,8 0 0

Nomina l P ipe S ize
S c hedule 40

1/ 2 ” 3,200 2,200 1,8 0 0 1,6 0 0 1,5 0 0

3/4″ 7,500 4,200 4,000 3,700 3,400

1,3 0 0 1,2 0 0 1,0 0 0 900 830 770 720

3 , 10 0 2,600 2,300 2 , 10 0 1,9 0 0 1,7 0 0 1,5 0 0

T o convert to capaci ties at 15 psig settings – multi ply by 1.130 T o convert to capaci ties at 5 psig settings – m ultiply by 0.879

Typical Propane Gas Installation

Sizing Betw een Second or Second Stage Regulator & Appliance*
Maximum Propane Capacities listed are based on 1/2″ W.C. pressure drop at 11″ W.C. setting.
Capacities in 1,000 BTU/hour.

WARNING
IF THE GAS FURNACE IS INSTALLED IN A BASEMENT, AN EXCAVATED
AREA OR A CONFINED SPACE, IT IS STRONGLY RECOMMENDED TO CONTACT A PROPANE SUPPLIER TO INSTALL A GAS DETECTING WARNING DEVICE IN CASE OF A GAS LEAK.
· SINCE PROPANE GAS IS HEAVIER THAN AIR, ANY LEAKING GAS CAN
SETTLE IN ANY LOW AREAS OR CONFINED SPACES.
· PROPANE GAS ODORANT MAY FADE, MAKING THE GAS UNDETECTABLE
EXCEPT WITH A WARNING DEVICE.
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 THE VICINITY OF THIS OR ANY OTHER APPLIANCE.
­ WHAT TO DO IF YOU SMELL GAS: · DO NOT TRY TO LIGHT ANY APPLIANCE. · DO NOT TOUCH ANY ELECTRICAL SWITCH; DO NOT USE ANY
PHONE IN YOUR BUILDING.
· IMMEDIATELY CALL YOUR GAS SUPPLIER FROM A 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.

Pipe or T u b in g Le ngth

Tubing S ize , O. D. Type L

Nomina l P ipe Siz e S c hedule 4 0

*Data in accordance with NFPA pamphlet No. 54

Propane Gas Piping Charts When installing a propane storage tank, the contractor must consider proper tank sizing, safety, efficiency, ground characteristics and aesthetics. For a residential customer, the size may range from 100-1,000 gallons, depending on household use. Typically, a 500 gallon tank is ample for an average four-bedroom home. However, it is best to consult your local propane supplier to ensure the proper sizing for propane storage requirements. Determining the correct tank size for each household is a function of demand, economy, efficiency and convenience. It is a process that requires cooperation between the propane supplier and customer.

ELECTRICAL CONNECTIONS

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

28

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INSTALLATION CONSIDERATIONS

WARNING
HIGH VOLTAGE DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO MAY CAUSE PROPERTY
DAMAGE, PERSONAL INJURY OR DEATH.

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

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

WARNING
TO AVOID THE RISK OF ELECTRICAL SHOCK, INJURY, 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.

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 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 N.E.C. 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.

WARNING
HIGH VOLTAGE DISCONNECT ALL POWER BEFORE SERVICING OR CHANGING ANY ELECTRICAL WIRING. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO MAY CAUSE
PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.
24 VOLT HUMIDIFIER A 24 volt humidifier can be connected to the normally open terminal of the main pressure switch. The humidifier common would then be connected to “C” on the control board low voltage terminal strip. 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.

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. NOTE: Line polarity must be observed when making field connections.
WARNING
IN 90% FURNACE UPRIGHT UPFLOW INSTALLATIONS, THE DRAIN TRAP MUST
BE MOUNTED ON THE OPPOSITE SIDE OF THE UNIT FROM THE JUNCTION
BOX. THIS WILL REDUCE THE RISK OF WATER REACHING THE JUNCTION
BOX IN THE EVENT OF A BLOCKED DRAIN CONDITION.
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 pan.

24 VOLT THERMOSTAT WIRING NOTE: Low voltage connections can be made through either the right or left side panel. Wire routing must not interfere with circulator blower operation, filter removal, or routine maintenance.
A 40 V.A. transformer and an integrated electronic control are built into the furnace to allow use with most cooling equipment. Consult the wiring diagram, located in the Technical Manual or on the blower door for further details of 115 Volt and 24 Volt wiring.
THERMOSTAT WIRING The single stage furnace will have a “W” terminal and will use a single stage thermostat. The following drawing illustrates the typical field wiring for a heat only single stage system and a single stage heating/single stage cooling system. Refer to the following figures for proper connections to the integrated control module.

29

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INSTALLATION CONSIDERATIONS
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 heating, the temperature of the return air entering the furnace must be between 55°F and 100°F.

CIRCULATING AIR AND FILTERS
DUCTWORK – AIR FLOW Duct systems and register sizes must be properly designed for the C.F.M. and external static pressure rating of the furnace. Ductwork should be designed in accordance with the recommended methods of “Air Conditioning Contractors of America” manual D.
A duct system should be installed 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 return air filter is not supplied with the furnace. The installer must supply a means of filtering all of the return air. Filter(s) shall comply with UL900 or CAN/ULC-S111 Standards. If the furnace is installed without filters, the warranty will be voided.
Upflow furnaces with air delivery of less than 1800 CFM:
Use one side return or one bottom return ductwork connection.
Upflow furnaces with air delivery of 1800 CFM or higher:
Use two side returns or one side return and one bottom return connection.
Guide dimples locate the side and bottom return cutout locations. Use a straight edge to scribe lines connecting the dimples. Cut out the opening on these lines. An undersized opening will cause reduced airflow. For bottom return connection, remove the bottom of the cabinet before setting the furnace on the raised platform or return air duct.
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. Supply and return connections to the furnace may be made with flexible joints to reduce noise transmission, if desired. If a central return is used, a connecting duct must be installed between the unit and the utility room wall so the blower will not interfere with combustion air or draft. The room, closet, or alcove must not be used as a return air chamber.
When the furnace is used in connection with a cooling unit, the furnace should be installed in parallel with or on the upstream side of the cooling unit to avoid condensation in

UPRIGHT FILTER INSTALLATIONS Depending on the installation and/or customer preference, differing filter arrangements can be applied. Filters can be installed in the central return register and a side panel external filter rack kit (upflow filter kit # EFR02). As an alternative a media air filter or electronic air cleaner can be used as the requested filter. Refer to the following minimum filter requirement charts for determination of the minimum filter area to ensure proper unit performance. The following figures show possible filter locations. NOTE: A ductwork access door must be used in counterflow applications to allow filter removal. If the filter rack is used, the side of the plenum must be at least as tall as dimension “A” shown in the following illustration. For dimension of “A” refer to the following chart.
Refer to Minimum Filter Area tables to determine filter area requirement. NOTE: Filters can also be installed elsewhere in the duct system such as a central return.
Horizontal Installations Filter(s) must be installed external to the furnace casing for horizontal installations. For most installations it is preferable to use a central return with filters installed in the duct behind the return air grill. In this way filter replacement is relatively simple by merely removing the grille, rather than going into the attic or crawl space.
ADDITIONAL FILTERING ACCESSORIES
External Filter Rack Kit (EFR02) The external filter rack kit is intended to provide a location external to the furnace casing, for installation of a permanent filter on upflow model furnaces. The rack is designed to mount over the indoor blower compartment area of either side panel, and provide filter retention as well as a location for attaching return air ductwork.
Electronic Air Cleaner (ASAS and GSAS) or Media
Air Cleaner (AMU and GMU) The electronic air cleaner and media air cleaner are multipositional high efficiency air filtration devices that can be installed in any position, except with the access door facing down. The best location for the air cleaner is in the return air duct next to the blower compartment. Before installing the air cleaner, consider the application. The electronic air cleaner must be readily accessible for periodic inspection and cleaning of the pre-filters and electronic cells

30

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INSTALLATION CONSIDERATIONS

while the media air cleaner must be readily accessible for periodic inspection and replacement of the Media Air Cleaner (AMU and GMU) filter cartridge (3 per carton) M0-1056, M1-1056, M2-1056, M8-1056, to maintain maximum efficiency and trouble-free operation. Carbon Filters 1156-3 and 1856-3 (set of 3) are also available. See Product Catalog for exact filter for your model.
NORMAL SEQUENCE OF OPERATION
POWER UP 1. 115 VAC power applied to furnace.
2. Integrated ignition control module performs internal checks.

3. Outdoor fan and compressor are energized.
   4. Circulator blower is energized on cool speed following a fixed five (5) second on delay.
   5. Furnace circulator blower and outdoor cooling unit run, integrated control module monitors safety circuits continuously.
   6. R and Y thermostat contacts open, completing the call for cool.
   7. Outdoor fan and compressor are de-energized.
   8. Circulator blower is de-energized following a fixed forty five (45) second cool off delay period.
   9. Furnace awaits next call from thermostat.

4. Integrated ignition control module LED will light.
   4. Integrated ignition control monitors safety circuits continuously.
   5. Furnace awaits call from thermostat.

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

NORMAL HEATING SEQUENCE
1. R and W thermostat contacts close, initiating a call for heat.

2. Integrated control module performs safety circuit checks.
   3. Circulator blower is energized on heat speed. Electronic air cleaner terminals are energized.

3. Integrated control module performs safety circuit 4. Circulator blower runs, integrated control module moni-

checks.

tors safety circuits continuously.

3. The induced draft blower is energized causing pressure switch contacts to close. Induced draft blower remains energized for pre-purge period.

4. R and G thermostat contacts open, completing the call for fan.
   6. Furnace awaits next call from thermostat

5. Ignitor warm up begins after pre-purge is completed. The ignition control has a WARM UP PERIOD OF 17 SECONDS.

6. Furnace awaits next call from thermostat.

7. Gas valve opens at end of ignitor warm up period, delivering gas to burners to establish flame.

8. The control checks for a signal from the flame sensor within seven (4) seconds after the gas valve is energized. Gas will only continue to flow if a flame signal is present.

9. Circulator blower is energized on heat speed following a fixed thirty (30) second blower on delay.

10. Furnace runs, integrated control module monitors safety circuits continuously.

11. R and W thermostat contacts open, allowing the gas valve to cycle off.

12. Induced draft blower is de-energized following a fifteen (15) -second post purge.

13. Circulator blower is de-energized following heat off delay period.

14. Furnace awaits next call from thermostat.

Cooling Mode The normal operational sequence in cooling mode is as follows:
1. R and Y thermostat contacts close, initiating a call for cool.
2. Integrated control module performs safety circuit checks.

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SYSTEM OPERATION

HEATING – Abnormal Operation
The following presents the probable causes of questionable furnace operation and how to fix them. Look through the observation window in the blower access door and make a note of the number of flashes in sequence between pauses. Next, refer to the Troubleshooting Chart on the following pages for an interpretation of the LED signals and to the information in this section for a description of the problem.
1. Internal Control Failure with Integrated Ignition Control. Check for voltage to the furnace and low voltage at the control board. Check for blown fuse on the control board. If the control determines it has an internal fault, it enters a locked-out state. Any of the situations mentioned will cause the diagnostic LED to provide no signal. The control board should only be replaced after all other checks from the Troubleshooting Chart have been verified.
2. System Lockout. If a flame is not sensed during the first seven (4) seconds after the gas valve is energized, the control turns off the gas. There will then be a 30 second delay while the induced draft blower is energized to purge the heat exchanger. The ignitor will next be energized and preheated. The gas valve will then be energized. If flame is not sensed in seven (4) seconds the gas valve will be de-energized and another purge will occur. The control will cycle the gas valve a total of three (3) times before it determines it cannot establish measurable combustion and enters a locked out state. The diagnostic light code for this problem is one short flash followed by a longer pause. The control can be reset and brought out of lockout mode by turning the thermostat off for more than (5) seconds and less than (20) seconds and then back on. It can also be reset by turning off the electrical disconnect switch to the furnace for a minimum of 5 seconds.
NOTE: The control board will automatically reset one hour after lockout occurs. If the furnace frequently has to be reset, it means that a problem exists that should be corrected. Refer to Troubleshooting Chart on the following pages for aid in determining the cause.
3. Pressure Switch Stuck Closed. If the control senses the pressure switch is closed when the induced draft blower is off, it waits until the fault is corrected. The diagnostic light code for this problem is 2 flashes. The probable cause is either a faulty pressure switch or wiring.
4. Pressure Switch Stuck Open. If, after the induced draft blower is energized, the pressure switch does not close within 5 minutes, the control will go into a 1-hour lockout. The control will automatically reset from lockout and restart the ignition sequence. The diagnostic light code for this problem is three short flashes followed by a pause. The probable causes are either disconnected hose to the pressure switch, faulty pressure switch or wiring, or restricted air intake or flue piping.
32

5. Open Primary or Auxiliary Limit. If the limit control opens, the air circulator blower will be turned on until the limit closes. The induced draft blower will turn off for 5 seconds then turn off. The diagnostic light code for this problem is four short flashes followed by a pause. The probable cause is either low conditioned air flow due to dirty filter or resistance in duct work, faulty limit, faulty blower, or blower speed set to low.
   6. Flame Sensed with No Call for Heat. If the control senses a flame when the gas valve is de-energized, it will run the air circulation blower and the induced draft blower continuously with no further furnace operation. The diagnostic flash code for this is a five flashes. The probable causes are either a short to ground in flame sense circuit, miswiring, lingering burner flame or a slow closing gas valve.
   7. Open Rollout Limit. If the rollout control opens, the air circulator blower will be energized all the time. The diagnostic light code for this problem is six flashes followed by a pause. The probable cause is either restricted flue piping or improper air requirements.
   8. Low Flame Sense Signal. If the furnace continues to operate and the micro- amp signal from the flame sensor falls below specified level, the diagnostic light code for this problem will be seven flashes followed by a pause. The probable cause is either a coated/oxidized sensor, incorrectly positioned sensor in burner flame or lazy burner flame due to improper gas pressure or combustion air.
   9. Igniter circuit or poor ground. Improperly connected igniter, bad igniter or poor ground to the equipment. The diagnostic light code for this problem is eight flashes.
   Combustion Quality
   Combustion quality can be affected by several factors. Major factors are venting and draining.
   Venting
   The venting system should be planned and installed with the following in mind;
   · Should not be longer than necessary
   · Use 45°elbows rather than 90° elbows when possible
   · Must not sag or otherwise trap condensate
   · Use longest radius fittings possible
   · If using 3″ venting, make the transition from 2″ to 3″ as close as practically possible
   · Make sure there is no flue gas recirculation into the combustion air pipe

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SYSTEM OPERATION
Condensate Drainage
Furnace combustion can be affected if a furnace is holding condensate. Check for proper connections of drain hoses, make sure furnace condensate trap is clean. Make sure furnace is not improperly sloped. Make sure air conditioning coil drain is not interfering with furnace drain.
Other Causes
1. Manifold Gas Pressure must be set for the gas being used, Natural or L.P., high and low firing rates. If converted to L.P. gas, check size of all orifices
2. Remove Draft Inducer, Check the integrity of the gasket between the inducer and the collector box cover, any air leak here will have a negative effect on combustion. Check the orifice hole in the collector box, it must be free of burrs on both sides
3. Make sure burners are clean, not out of position and line up correctly with exchanger tubes, including the heat exchanger orifice plate between the burners and the heat exchanger tubes, make sure it is not loose, missing a screw or hanging down between the burners and heat exchangers causing flame impingement.
4. Make sure the field installed gas line is not binding and causing distortion of burner assembly
5. If the furnace is installed as a one pipe system; make sure the surrounding area and structure are adequate to provide combustion air
6. Make sure there are no cabinet air leaks allowing supply air to affect combustion
7. If heat exchanger integrity is uncertain, follow procedures in Service Bulletin SF-041

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33

ACCESSORIES
EXTERNAL FILTER RACK ( EFR02 )

EFR02 EXTERNAL FILTER RACK KIT Used on Models
90% Upflow Model Furnaces

SLOTS IN FILTER CLEAR SCREWS
ON UNIT

UNIT SIDE PANEL

FRONT OF UNIT

LOWER EDGE SCREW

SIDE WALL VENT KIT (0170K00000S/0170K00001S)
SIDE WALL VENT KIT (0170K00000S)
This side wall only vent kit #0170K00000S is to be used with 2″ – 3″ vent systems. This kit is NOT intended for use with single pipe (indirect vent) installations. The vent kit must terminate outside the structure and may be installed with the intake and exhaust pipes located sideby-side or with one pipe above the other. See the section in this manual under “Vent Flue and Combustion Air Pipe Terminations” for more information or consult the Installation Instructions (IO-635).

SIDE WALL VENT KIT (0170K00001S)
This side wall only vent kit #0170K00001S is to be used with 2″ vent systems. This kit is NOT intended for use with single pipe (indirect vent) installations. The vent kit must terminate outside the structure and may be installed with the intake and exhaust pipes located sideby-side or with one pipe above the other. See the section in this manual under “Vent Flue and Combustion Air Pipe Terminations” for more information or consult the Installation Instructions (IO-805).
34

H orizontal Installation Vertical Installation

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ACCESSORIES

CONCENTRIC VENT CONVERSION KIT

(CVENT-2 (DCVK-20) CVENT-3 (DCVK-30)

Vent

The CVENT-2 (DCVK-20) (2″) or the CVENT-3 (DCVK-30) (3″) is a concentric vent kit approved with furnaces listed in this manual.

Combustion Air

This concentric vent kit allows for vertical or horizontal vent termination. The illustrations give a brief view of the kit and its application.

Roof Boot/Flashing (Field Supplied)

See the section in this manual under “Vent Flue and Combustion Air Pipe Terminations” for more information or consult the Installation and Operating Instructions (IO-619*).

Maintain 12″ (18″ for Canada) minimum clearance above highest anticipated snow level. Maximum of 24″ above roof.
Support (Field Supplied) 45 Elbow (Field Supplied)

Vent

Combustion Air

DCVK (Vertical Installation)

Vent

Strap (Field Supplied)

Combustion Air Ve nt

Combustion Air

45 Elbow (Field Supplied)

Flush to 1″ maximum

DCVK (Horizontal Installation)
35
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RF000142

CFSB-24 LPLP03
AFE16-60A

CFSB-21

0170K00001S 0170K00000S DCVK-20 (CVENT-2) DCVK-30 (CVENT-3)
LPM07 CFSB-17

ACCESSORIES
GOODMAN® and AMANA® BRAND MSS9/CSS9 Model Furance Accessories
MODEL NUMBER

ASAS / GSAS

EFR02 AMU / GMU

Drain Coupling

Down Flow Base LP Low Pressure
Shut Off Kit Dual Fuel Board

Down Flow Base

Concentric Side Wall Flush Mount Vent Kit Concentric Side Wall Flush Mount Vent Kit Concentric Vent Kit
(2″) Concentric Vent Kit
(3″) Propane Gas Conversion Kit Down Flow Base

Electronic Air Cleaner

EFR External Filter Rack
Media Air Cleaners

Description

MSS90402BNAA MSS90603BNAA MSS90803BNAA MSS90804CNAA MSS90805CNAA MSS921004CNAA MSS91005CNAA MSS91205DNAA CSS90402BNAA CSS90603BNAA CSS90804CNAA CSS91005CNAA CSS961205DNAA

(1)

(1) Required above 7,000 Ft altitude

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ACCESSORY WIRE DIAGRAMS
HIGH VOLTAGE! DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.
ALL FUEL SYSTEM CONTROL BOARD – AFE1860A

POWER SUPPLY INPUT FURNACE DEMAND OUTPUT BLOWER FAN DEMAND OUTPUT POWER SUPPLY I NPUT (COMMON) SECOND STAGE FURNACE DEMAND OUTPUT COMPRESSOR OUTPUT
SECOND STAGE COMPRESSOR OUTPUT REVERSING VALVE OUTPUT
POWER SUPPLY OUT TO THERMOSTAT CALL FOR REVERSING VALVE CALL FOR COMPRESSOR CALL FOR EMERGENCY HEAT CALL FOR BLOWER FAN CALL FOR FURNACE HEAT POWER SUPPLY COMMON OUT TO THERMOSTAT CALL FOR 2ND STAGE FURNACE HEAT CALL FOR 2ND STAGE COMPRESSOR
POWER SUPPLY OUT TO HP CONTROL HP CALL FOR FURNACE (DURING DEFROST) REVERSING VALVE OUTPUT COMPRESSOR CONTACTOR OUTPUT POWER SUPPLY COMMON OUT TO HP CONTROL
ODT (OUTDOOR THERMOSTAT)
2ND STAGE COMPRESSOR DEMAND OUTPUT

2

R

P3-2

P3-6

C

P3-3

P3-1

P3-4

P3-5

F1 3A

BREAK FOR ODT

24 VA C C

POWER SUPPLY

+VD C +5VDC
+VD C
K1

24 VA C

W1-FURN W2-HP G-STAT G-FURN

K2 +VDC
K4 Q1

+5VDC

K3 Q2

E/W1
1. 0K
MICROPROCESSOR O
6. 8K

Y2-HP
Y2-STAT Y2-FURN Y-STAT Y-FURN Y-HP

Y
6. 8K

1

ALL FUEL SYSTEM CONTROL BOARD – AFE18-60A This wiring diagram is for reference only. Not all wiring is as shown above.
Refer to the appropriate wiring diagram for the unit being serviced. (For use with Heat Pumps in conjunction with 80% or 90% Single-Stage or Two-Stage Furnaces)
37
e

Install jumpers here for GMH, AMH, GDH, GCH

()

()

()

()

()

GN

(-)

(+)

BL RED

(

(

(

(

RED BL

ACCESSORY WIRE DIAGRAMS
HIGH VOLTAGE! DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.
For installations made prior to 2/1/11
FURNACE TWINING KIT – FTK03A (Johnson Control Board) This wiring diagram is for reference only. Not all wiring is as shown above.
Refer to the appropriate wiring diagram for the unit being serviced. (For use only with 80% or 90% Single-Stage Furnaces)
38
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Fan/LE Sensor

Fan/LE Sensor

r)

RC

RC

1. r) BL BL

(

Wire as above for GMH, AMH, GDH AND GCH hybrid furnaces.

ace 1

(
For GMH, AMH, GDH, GCH
Black – High Blue – Med./High Orange – Med./Low Red – Low
Furnace 2

ACCESSORY WIRE DIAGRAMS
HIGH VOLTAGE! DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.
For installations made after 2/1/11
FURNACE TWINING KIT – FTK04 (UTEC Control Board) This wiring diagram is for reference only. Not all wiring is as shown above.
Refer to the appropriate wiring diagram for the unit being serviced. (For use only with 80% or 90% Single-Stage Furnaces) NOTE: Not compatible with PCBBF112 Control Boards.
39
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SERVICING

40

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SERVICING
As more and more electronic’s are introduced to the Heating Trade, Polarization of incoming power and phasing of primary to secondary voltage on transformers becomes more important.
Polarization has been apparent in the Appliance industry since the introduction of the three prong plug, however, the Heating Industry does not use a plug for incoming power, but is hard wired.
Some of the electronic boards being used today, with flame rectification, will not function properly and/or at all without polarization of incoming power. Some also require phasing between the primary and secondary sides of step-down transformers.
We recommend that these two items be checked during normal installation and/or service calls. See as follows:

INCOMING POWER

METER READS

METER READS

120 VOLTS

0 VOLTS

VOLT / OHM METER

VOLT / OHM METER

GND GND

THIS IS L1 OR THE HOT POWER LEG

THIS IS THE COMMON OR NEUTRAL LEG

These then should be wired to the furnace accordingly. Some transformers will display phasing symbols as shown

CHECKING FOR PHASING – PRIMARY TO SECONDARY OF UNMARKED TRANSFORMERS*

METER READS 24 VOLTS

.. . .

.

.

METER READS

C GND

N

120 VOLTS

R

L1

VOLT / OHM METER

VOLT / OHM METER

TRANSFORMER LINE VOLTAGE

C GND

(NEUTRAL)

R

SECONDARY PRIM ARY

LINE VOLTAGE L1 (HOT)

VOLT / OHM METER

READS 96 VOLTS – IN PHASE

C GND

N

R

L1

VOLT / OHM METER

VOLT / OHM METER
READS 144 VOLTS – OUT OF PHASE

If meter reads approximately 96 volts – the primary to secondary are in phase – if reads approximately 144 volts out of phase – reverse low voltage wires.
*NOTE: For flame rectification the common side of the secondary voltage (24 V) is cabinet grounded. If you were to bench test a transformer the primary neutral and secondary common must be connected together for testing purposes.

C

GND

24 V R

NEUTRAL
120 V L1

in the illustration to the left to assist in determining proper transformer phasing.
Checking for polarization and phasing should become a habit in servicing. Let’s start now.

120

5 cu/ft
500 486 474 462 450 439 429 419 409 400 391 383 375 367 360 355 346 340 333 327 321 316 310 305 300

42

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SERVICING
Service Proble m

No Heat Unsatisfa ctory Heat

SYMPTOM System Will Not Start Burner Won’t Ignite Burner Ignites-Locks Out Burner Shuts Off prior to T’Stat being Satisfied
Short Cycles Long Cycles Soot and /or Fumes Too Much Heat Not Enough Heat
See Service Procedure Reference

POSSIBLE CAUSE
DOTS IN ANALYSIS GUIDE INDICATE
“POSSIBLE CAUSE”

Test Method Remedy

Power Failure Blown Fuse Loose Connection Shorted or Broken Wires No Low Voltage Faulty Thermostat Faulty Transformer Poor or High Resistance Ground Improper Heat Anticipator Setting Improper Thermostat Location Faulty Limit or Roll Out Switch Faulty Flame Sensor Faulty Ignition Control Gas Valve or Gas Supply Shut Off Faulty Induced Draft Blower Faulty Blower Motor (PSC) Broken or Shorted Ignitor Dirty Flame Sensor, Low UA Stuck Gas Valve Faulty Gas Valve Open Auxiliary Limit Improper Air Flow or Distribution Cycling on Limit Delayed Ignition Flas hbac k Orifice Size Gas Pressure Cracked Heat Exchanger Furnace Undersized Furnace Oversized Faulty Pressure Switch Blocked or Restricted Flue Open Roll Out Switch Bouncing On Pressure Switch

Test Voltage

Test Voltage

Check W iring

Check W iring

Check Transformer

• • ·
• · Check Thermostat

Check Transformer

Measure Ground Resistance

• ·
• · Adjust Heat Anticipator Setting
• ·
• · Relocate Thermostat
• ·

Test Control

Test Flame Sensor

• ··

Test Control

Turn Valves to On Position

Test Induced Draft Motor

• ·

Test Blower Motor (PSC)

Test Ignitor

Clean Flame Sensor

• • ·

Replace Gas Valve

• • • Replace Gas Valve
• ·

Reset Control

• • Check Duct Static
• ·
• Check Controls & Temperature Rise

Test for Delayed Ignition

Test for Flashback

• · · Check Orifices
• • · · Check Gas Pressure

Check Burner Flames

• • Replace with Proper Size Furnace

Replace with Proper Size Furnace

• ··

Test Pressure Switch

Check Flue/Drawdown Pressure

• ·

Test Flame Roll Out Control

Test Negative Pressure

S -1 S -4 S -2 S-3A S -4 S-3A S -4 S -17B S-3B S -316 S-300 / S-302 S -314 S -313 S -317 S -303 S -16A S -308 S -314 S -304 S -304 S -301 S -200 S-201 / S-300 S -312 S-309 / S-311 S-306 / S-311 S -307 S -305 S -318 S -318 S -310 S -310 S -302 S -310

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43

TROUBLESHOOTING

Symptoms of Abnormal Operation
· Furnace fails to operate. · Integrated control
module diagnostic LED provides no signal.
· LED is Steady On.

Associated LED Code2

FFaauulltt DDeessccrriippttiioonn((ss))

PPoossssibibleleCCaauusseess

NONE

• No 115 volt power to · Manual disconnect

furnace, or no 24

switch OFF, door switch

volt power to

open, or 24 volt wires

integrated control

improperly connected or

module.

loose.

• Blown fuse or circuit · Blown fuse or circuit

breaker.

breaker.

• Integrated control module has an
  internal fault.

• Integrated control module has an internal fault.

Corrective Action

Cautions and Notes

• Assure 115 and 24 volt power to furnace
• Turn power OFF prior to repair.

integrated control module. · Replace integrated

• Check integrated control control module

module fuse (3A).

fuse with 3A

Replace if necessary.

automotive fuse.

References

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