Goodman Amana AMH8 Operating instructions

RS6612007r3
August 2016
Service Instructions
Copyright © 2006-2014, 2016 Goodman Manufacturing Company, L.P.
Goodman®& Amana®Brand
33 3/8" 80% Modified Two Stage Gas Furnaces
AMH8, GMH8, GDH8, ADSH8
& 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 manufacutrer's installation and operation
instructions.
is a registered trademark of Maytag Corporation or its related companies and is used under license.
All rights reserved.
®

2
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 CONSUMERSAND 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.
TABLE OF CONTENTS
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.
IMPORTANTINFORMATION........................2 - 3
PRODUCTIDENTIFICATION ..................... 4 - 10
ACCESSORIES ................................... 11- 15
OPERATINGINSTRUCTIONS .................... 16 - 18
PRODUCTDESIGN............................... 19 -39
SYSTEMOPERATION ................................. 40
TROUBLESHOOTING ............................ 41- 42
MAINTENANCE .................................. 43- 46
SERVICING ....................................... 47- 63
SERVICINGTABLEOFCONTENTS .................. 49
WIRINGDIAGRAMS/SCHEMATICS .................. 64
O NLY PERSONNEL THAT HAVE BEEN TRAINED TO INSTALL , ADJUST , SERVICE OR
REPAIR ( HEREINAFTER , “ SERVICE ”) THE EQUIPMENT SPECIFIED IN THIS
MANUAL SHOULD SERVICE THE EQUIPMENT . T HE MANUFACTURER WILL NOT
BE RESPONSIBLE FOR ANY INJURY OR PROPERTY DAMAGE ARISING FROM
IMPROPER SERVICE OR SERVICE PROCEDURES . I F YOU SERVICE THIS UNIT , YOU
ASSUME RESPONSIBILITY FOR ANY INJURY OR PROPERTY DAMAGE WHICH MAY
RESULT . I N ADDITION , IN JURISDICTIONS THAT REQUIRE ONE OR MORE
LICENSES TO SERVICE THE EQUIPMENT SPECIFIED IN THIS MANUAL , ONLY
LICENSED PERSONNEL SHOULD SERVICE THE EQUIPMENT . I MPROPER
INSTALLATION , ADJUSTMENT , SERVICING OR REPAIR OF THE EQUIPMENT
SPECIFIED IN THIS MANUAL , OR ATTEMPTING TO INSTALL , ADJUST , SERVICE OR
REPAIR THE EQUIPMENT SPECIFIED IN THIS MANUAL WITHOUT PROPER
TRAINING MAY RESULT IN PRODUCT DAMAGE , PROPERTY DAMAGE , PERSONAL
INJURY OR DEATH .

3
IMPORTANT INFORMATION
To locate an authorized servicer, please consult your
telephonebookorthedealerfromwhomyoupurchased
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:
customerserv[email protected]
fax us at: [phone]
(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[email protected]
fax us at: [phone]
(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.
B10259-216
CO can cause serious illness including permanent brain
damage or death.
Advertencia especial para la instalación de calentadores ó manejadoras
de aire en áreas cerradas como estacionamientos ócuartos de servicio.
B10259-216
El monóxido de carbono puede causar enfermedades severas
como daño cerebral permanente ó muerte.
Las emisiones de monóxido de carbono pueden circular a través
del aparato cuando se opera en cualquier modo.
B10259-216
RISQUE D'EMPOISONNEMENT AUMONOXYDE DE CARBONE
Cette ventilation est nécessaire pour éviter le danger d'intoxication
au CO pouvant survenir si un appareil produisant du monoxyde
de carbone continue defonctionnerausein delazoneconfinée.

PRODUCT IDENTIFICATION
4
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.
GMH80 060 3ANAA
12345 678 910111213
Brand Minor Revision
G - Goodman A - Initial Release
A- Amana®Brand B - 1st Revision
Configuration
M - Upflow/Horizontal Major Revision
C - Downflow/Horizontal A - Initial Release
K - Dedicated Upflow B - 1st Revision
D - Dedicated Downflow Nox
Gas Vale / Motor N - Natural Gas
E- Convertible 2 Stage / High Efficiency X - Low NOx
H - Convertible 2 Stage / Single Speed
S - Single Stage / Single Speed Cabinet Width
A - 14"
AFUE B - 17.5"
97 - 97% AFUE C - 21"
80 - 80% AFUE D - 24.5"
MBTU/h Maximum CFM
40 - 40,000 3 - 1200 CFM
60 - 60,000 4 - 1600 CFM
80 - 80,000 5 - 2000 CFM
100 - 100,000
120 - 120,000
140 - 140,000
G
oo
d
man
F
urnace
N
omenc
l
ature
(13
Di
g
i
ts
)
A D S H 80 060 3 B N A A
1 2 3 4 5 6 7 8 9 10 11 12 13 14
Brand Minor Revision
A- Amana®Brand A- Initial Release
B - 1stRevision
Configuration
M- Upflow/Horizontal Major Revision
C - Downflow/Horizontal A- Initial Release
K - Dedicated Upflow B - 1stRevision
D - Dedicated Downflow Nox
Motor N - Natural Gas
V - Variable Speed/ComfortNet X- LowNOx
E - HighEfficiency
S - Single Speed Cabinet Width
A- 14"
Gas Valve B - 17.5"
M- Modulating C - 21"
C - 2Stage D- 24.5"
H - Convertible 2 Stage
S - Single Stage Maximum CFM
3 - 1200 CFM
AFUE 4 - 1600 CFM
97 - 97% AFUE 5 - 2000 CFM
80 - 80% AFUE
MBTU/h
40 - 40,000
60 - 60,000
80 - 80,000
100- 100,000
120- 120,000
Amana® Brand Furnace Nomenclature (14 Digits)

PRODUCT IDENTIFICATION
5
MODEL# MFG.# DESCRIPTION
GDH8**CA
GDH80453A*
GDH80703A*
GDH80904B*
GDH81155C*
Goodman® Brand 80% Modified Two-Stage Gas Furnace, Dedicated down flow installation, 33
3/8" tall, Induced draft, Two stage gas Valve, Integrated circuit board controlling 2nd stage gas
valve by time. Left or right side gas entry. Aluminized steel heat exchanger. PSC blower motor.
115 volt silicon nitride igniter. "X" models are low NOx. Chassis sizes are 14", 17.5" and 21" wide.
GDH8***CB
GDH80453A*
GDH80703A*
GDH80904B*
GDH81155C*
Goodman® Brand 80% Modified Two-Stage Gas Furnace, Dedicated down flow installation, 33
3/8" tall, Induced draft, Two stage gas Valve, Integrated circuit board controlling 2nd stage gas
valve by time. Left or right side gas entry. Aluminized steel heat exchanger. PSC blower motor.
115 volt silicon nitride igniter. "X" models are low NOx. Chassis sizes are 14", 17.5" and 21" wide.
"CB" revisions went to a Honeywell gas valve.
GDH8***AA
GDH80403A*
GDH80603A*
GDH80804B*
GDH81005C*
Goodman® Brand 80% Modified Two-Stage Gas Furnace, New model nomenclature, fired at
23,000 BTUH per burner. Dedicated down flow installation, 33 3/8" tall, Induced draft, Two stage
gas Valve, Integrated circuit board controlling 2nd stage gas valve by time. Left or right side gas
entry. Aluminized steel heat exchanger. PSC blower motor. 115 volt silicon nitride igniter. "X"
models are low NOx. Chassis sizes are 14", 17.5" and 21" wide.
GDH8***BA
GDH80403A*
GDH80603A*
GDH80804B*
GDH81005C*
Goodman® Brand 80% Modified Two-Stage Gas Furnace, fired at 20,000 BTUHper burner.
Dedicated down flow installation, 33 3/8" tall, Induced draft, Two stage gas valve, Integrated circuit
board controlling 2nd stage gas valve by time. Left or right side gas entry. Aluminized steel heat
exchanger. PSC blower motor. 115 volt silicon nitride igniter. "X" models are low NOx. Chassis
sizes are 14", 17.5" and 21" wide. "BA" revisions have a standard rated altitude of 4,500 ft.
GDH8***BB
GDH80403A*
GDH80603A*
GDH80804B*
GDH81005C*
Goodman® Brand 80% Modified Two-Stage Gas Furnace, fired at 20,000 BTUHper burner.
Dedicated down flow installation, 33 3/8" tall, Induced draft, Two stage gas valve, Integrated circuit
board controlling 2nd stage gas valve by time. Left or right side gas entry. Aluminized steel heat
exchanger. PSC blower motor. 115 volt silicon nitride igniter. "X" models are low NOx. Chassis
sizes are 14", 17.5" and 21" wide. "BB" revisions have a standard rated altitude of 5,500 ft.
GDH8***BC GDH80403B*
GDH80603B*
Goodman® Brand 80% Modified Two-Stage Gas Furnace, fired at 20,000 BTUHper burner.
Dedicated down flow installation, 33 3/8" tall, Induced draft, Two stage gas valve, Integrated circuit
board controlling 2nd stage gas valve by time. Left or right side gas entry. Aluminized steel heat
exchanger. PSC blower motor. 115 volt silicon nitride igniter. "X" models are low NOx. Chassis
size is 14" wide. "BC" revisions are equipped with a Broad Ocean motor.

PRODUCT IDENTIFICATION
6
MODEL # MFG.# DESCRIPTION
GMH8**CA
GMH80453A*
GMH80703A*
GMH80704B*
GMH80903B*
GMH80904C*
GMH80905C*
GMH81155C*
GMH81405D*
Goodman® Brand 80% Modified Two-Stage Gas Furnace, Upflow/Horizontal Left and Right
installation, 33 3/8" tall, Induced draft, Two stage gas Valve, Integrated circuit board
controlling 2nd stage gas valve by time. Left or right side gas entry. Aluminized steel heat
exchanger. PSC blower motor. 115 volt silicon nitride igniter. "X" models are low NOx.
Chassis sizes are 14", 17.5" 21, and 24.5" wide.
GMH8***CB
GMH80453A*
GMH80703A*
GMH80704B*
GMH80903B*
GMH80904C*
GMH80905C*
GMH81155C*
GMH81405D*
Goodman® Brand 80% Modified Two-Stage Gas Furnace,Upflow/Horizontal Left and Right
installation, 33 3/8" tall, Induced draft, Two stage gas Valve, Integrated circuit board
controlling 2nd stage gas valve by time. Left or right side gas entry. Aluminized steel heat
exchanger. PSC blower motor. 115 volt silicon nitride igniter. "X" models are low NOx.
Chassis sizes are 14", 17.5" 21, and 24.5" wide. CB revision changed to a rotatable inducer
(clockwise).
GMH8***CC
GMH80453A*
GMH80703A*
GMH80704B*
GMH80903B*
GMH80904C*
GMH80905C*
GMH81155C*
GMH81405D*
Goodman® Brand 80% Modified Two-Stage Gas Furnace, Upflow/Horizontal Left and Right
installation, 33 3/8" tall, Induced draft, Two stage gas Valve, Integrated circuit board
controlling 2nd stage gas valve by time. Left or right side gas entry. Aluminized steel heat
exchanger. PSC blower motor. 115 volt silicon nitride igniter. "X" models are low NOx.
Chassis sizes are 14", 17.5" 21, and 24.5" wide. CC revision changed to a Honeywell gas
valve.
GMH8***CD GMH81405D*
Goodman®Brand 80% Modified Two-Stage Gas Furnace.Upflow/Horizontal Left and right
installation, 33 3/8" tall, Induced draft, Two stage gas Valve, Integrated circuit board
controlling 2nd stage gas valve by time. Left or right side gas entry. Aluminized steel heat
exchanger. PSC blower motor. 115 volt silicon nitride igniter. Chassis size 24.5" wide. "CD"
revision has a standard rated altittude of 5,500 ft.
GMH8***AA
GMH80403A*
GMH80603A*
GMH80604B*
GMH80803B*
GMH80804C*
GMH80805C*
GMH81005C*
GMH81205D*
Goodman® Brand 80% Modified Two-Stage Gas Furnace, New model nomenclature, fired
at 23,000 BTUH per burner. Upflow/Horizontal Left and Right installation, 33 3/8" tall,
Induced draft, Two stage gas Valve, Integrated circuit board controlling 2nd stage gas valve
by time. Left or right side gas entry. Alulinized steel heat exchanger. PSC blower motor. 115
volt silicon nitride igniter. "X" models are low NOx. Chassis sizes are 14", 17.5" 21, and
24.5" wide.
GMH8***BA
GMH80403A*
GMH80603A*
GMH80604B*
GMH80803B*
GMH80804C*
GMH80805C*
GMH81005C*
GMH81205D*
Goodman® Brand 80% Modified Two-Stage Gas Furnace, fired at 20,000 BTUH per
burner. Upflow/Horizontal Left and Right installation, 33 3/8" tall, Induced draft, Two stage
gas Valve, Integrated circuit board controlling 2nd stage gas valve by time. Left or right side
gas entry. Aluminized steel heat exchanger. PSC blower motor. 115 volt silicon nitride
igniter. "X" models are low NOx. Chassis sizes are 14", 17.5" 21, and 24.5" wide. "BA"
revisions have a standard rated altitude of 4,500 ft
GMH8***BB
GMH80403A*
GMH80603A*
GMH80604B*
GMH80803B*
GMH80804C*
GMH80805C*
GMH81005C*
Goodman® Brand 80% Modified Two-Stage Gas Furnace, fired at 20,000 BTUH per burner.
Upflow/Horizontal Left and Right installation, 33 3/8" tall, Induced draft, Two stage gas valve,
Integrated circuit board controlling 2nd stage gas valve by time. Left or right side
gas entry. Aluminized steel heat exchanger. PSC blower motor. 115 volt silicon nitride
igniter. "X" models are low NOx. Chassis sizes are 14", 17.5" 21, and 24.5" wide. "BB"
revisions and GMH81205D*BA have a standard rated altitude of 5,500 ft.
GMH8***BC GMH80403A* GMH80603A*
GMH80803B*
Goodman® Brand 80% Modified Two-Stage Gas Furnace, fired at 20,000 BTUH per burner.
Upflow/Horizontal Left and Right installation, 33 3/8" tall, Induced draft, Two stage gas valve,
Integrated circuit board controlling 2nd stage gas valve by time. Left or right side gas entry.
Aluminized steel heat exchanger. PSC blower motor. 115 volt silicon nitride igniter. "X" models are
low NOx. Chassis sizes are 14" & 17.5" wide. "BC" revisions are equipped with a Broad Ocean
motor.

PRODUCT IDENTIFICATION
7
MODEL# MFG.# DESCRIPTION
AMH8**CA
AMH80453A*
AMH80703A*
AMH80704B*
AMH80903B*
AMH80904C*
AMH80905C*
AMH81155C*
AMH81405D*
Amana® Brand 80% Modified Two-Stage Gas Furnace, Upflow/Horizontal Left and Right
installation, 33 3/8" tall, Two tone painted cabinet. Induced draft, Two stage gas Valve, Integrated
circuit board controlling 2nd stage gas valve by time. Left or right side gas entry.
Stainless steel heat exchanger. PSC blower motor. 115 volt silicon nitride igniter. "X"
models are low NOx. Chassis sizes are 14", 17.5" 21, and 24.5" wide.
AMH8***CB
AMH80453A*
AMH80703A*
AMH80704B*
AMH80903B*
AMH80904C*
AMH80905C*
AMH81155C*
AMH81405D*
Amana® Brand 80% Modified Two-Stage Gas Furnace, Upflow/Horizontal Left and Right
installation, 33 3/8" tall, Two tone painted cabinet. Induced draft, Two stage gas Valve, Integrated
circuit board controlling 2nd stage gas valve by time.Left or right side gas entry.
Stainless steel heat exchanger. PSC blower motor. 115 volt silicon nitride igniter. "X"
models are low NOx. Chassis sizes are 14", 17.5" 21, and 24.5" wide. CB revision changed
to a rotatable inducer (clockwise).
AMH8***CC
AMH80453A*
AMH80703A*
AMH80704B*
AMH80903B*
AMH80904C*
AMH80905C*
AMH81155C*
AMH81405D*
Amana® Brand 80% Modified Two-Stage Gas Furnace, Upflow/Horizontal Left and Right
installation, 33 3/8" tall, Two tone painted cabinet. Induced draft, Two stage gas Valve, Integrated
circuit board controlling 2nd stage gas valve by time. Left or right side gas entry. Stainless steel heat
exchanger. PSC blower motor. 115 volt silicon nitride igniter. "X" models are low NOx. Chassis sizes
are 14", 17.5" 21, and 24.5" wide. CC revision changed to a Honeywell gas valve.
AMH8**CE AMH81405D*
Amana® Brand 80% Modified Two-Stage Gas Furnace, Upflow/Horizontal Left and Right
installation, 33 3/8" tall, Two tone painted cabinet. Induced draft, Two stage gas Valve, Integrated
circuit board controlling 2nd stage gas valve by time.Left or right side gas entry.
Stainless steel heat exchanger. PSC blower motor. 115 volt silicon nitride igniter. "X" model
is low NOx. Chassis size is 24.5" wide. "CE" revision has a standard rated altitude of 5,500
ft.
AMH8***AA
AMH80403A*
AMH80603A*
AMH80604B*
AMH80803B*
AMH80804C*
AMH80805C*
AMH81005C*
AMH81205D*
Amana® Brand 80% Modified Two-Stage Gas Furnace, New model nomenclature, fired at
23,000 BTUH per burner. Upflow/Horizontal Left and Right installation, 33 3/8" tall, Two tone painted
cabinet. Induced draft, Two stage gas Valve, Integrated circuit board controlling 2nd
stage gas valve by time. Left or right side gas entry. Stainless steel heat exchanger. PSC
blower motor. 115 volt silicon nitride igniter. "X" models are low NOx. Chassis sizes are
14", 17.5" 21, and 24.5" wide.
AMH8***BA
AMH80403A*
AMH80603A*
AMH80604B*
AMH80803B*
AMH80804C*
AMH80805C*
AMH81005C*
AMH81205D*
Amana® Brand 80% Modified Two-Stage Gas Furnace, fired at 20,000 BTUH per burner.
Upflow/Horizontal Left and Right installation, 33 3/8" tall, Two tone painted cabinet. Induced draft,
Two stage gas Valve, Integrated circuit board controlling 2nd stage gas valve by time.
Left or right side gas entry. Stainless steel heat exchanger. PSC blower motor. 115 volt
silicon nitride igniter. "X" models are low NOx. Chassis sizes are 14", 17.5" 21, and 24.5"
wide. "BA" revisions have a standard rated altitude of 4,500 ft.
AMH8***BB
AMH80403A*
AMH80603A*
AMH80604B*
AMH80803B*
AMH80804C*
AMH80805C*
AMH81005C*
Amana® Brand 80% Modified Two-Stage Gas Furnace, fired at 20,000 BTUH per burner.
Upflow/Horizontal Left and Right installation, 33 3/8" tall, Two tone painted cabinet. Induced draft,
Two stage gas Valve, Integrated circuit board controlling 2nd stage gas valve by time. Left or right
side gas entry. Stainless steel heat exchanger. PSC blower motor. 115 volt silicon nitride igniter. "X"
models are low NOx. Chassis sizes are 14", 17.5" 21, and 24.5" wide. "BB" revisions and
AMH81205D*BA have a standard rated altitude of 5,500 ft
AMH8***BC AMH80403A* AMH80603A*
AMH80803B*
Amana® Brand 80% Modified Two-Stage Gas Furnace, fired at 20,000 BTUH per burner.
Upflow/Horizontal Left and Right installation, 33 3/8" tall, Two tone painted cabinet. Induced draft,
Two stage gas Valve, Integrated circuit board controlling 2nd stage gas valve by time. Left or right
side gas entry. Stainless steel heat exchanger. PSC blower motor. 115 volt silicon nitride igniter. "X"
models are low NOx. Chassis sizes are 14", 17.5" wide. "BC" revisions are equipped with a Broad
Ocean motor.

PRODUCT IDENTIFICATION
8
MODEL# MFG.# DESCRIPTION
ADSH80***AA
ADSH800403AX*
ADSH800603AX*
ADSH800804CX*
ADSH801005CX*
Amana® Brand 80% Modified Two-Stage Gas Furnace, Dedicated down flow installation, 33 3/8"
tall, Two tone painted cabinet. Induced draft, Two stage gas Valve, Integrated circuit board controlling
2nd stage gas valve by time. Left or right side gas entry. Stainless steel heat exchanger. PSC b
lower motor. 115 volt silicon nitride igniter. "X" models are low NOx. Chassis sizes are 14", 17.5" and
21" wide. Standard rated altitude of 5,500 ft
ADSH80***AB ADSH800403AX*
ADSH800603AX*
Amana® Brand 80% Modified Two-Stage Gas Furnace, Dedicated down flow installation, 33 3/8"
tall, Two tone painted cabinet. Induced draft, Two stage gas Valve, Integrated circuit board controlling
2nd stage gas valve by time. Left or right side gas entry. Stainless steel heat exchanger. PSC b
lower motor. 115 volt silicon nitride igniter. "X" models are low NOx. Chassis size is 14" wide.
Standard rated altitude of 5,500 ft. "AB" revisions are equipped with a Broad Ocean motor.

PRODUCT IDENTIFICATION
9
MODEL # MFG # DESCRIPTION
AFE18-60A N/A
Fossil Fuel Kit. The AFE18-60A control is designed for use where the indoor coil is located
above/downstream of a gas or fossil fuel furnace when used with a heat pump. It will operate with
single and two stage heat pumps 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 timed off delay when the compressor goes off.
EFR01 P1221001
P1221002F
External Filter Rack Kit. For use with Goodman® and Amana® Brand upflow furnaces. This kit
is intended to 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.
FTK04 FTK04
Furnace Twinning Kit. This kit allows Goodman® or Amana® Brand single stage 80% gas
furnaces to operate at the same time from a single thermostat. The two furnaces to be "twinned"
must be the exact same model with their circulating air blowers set to deliver the same air flow at
the same time. This kit cannot be used to control more than two furnaces.
HANG20 N/A High Altitude Natural Gas Kit. The kit is designed to convert 80% gas furnace models
fired at 20,000 Btu's per cell for higher altitudes. This kit is required when installing these
furnaces above their maximum rated altitude.
HANG21 N/A High Altitude Natural Gas Kit. The kit is designed to convert 80% gas furnace models
fired at 20,000 Btu's per cell for higher altitudes. This kit is required when installing these
furnaces above their maximum rated altitude.
HA02 N/A
High Altitude Natural Gas Kit. The kit is designed to convert Goodman®, Amana® Brand gas
furnace models fired at 22,500 BTU's per cell for higher altitudes. This kit is required when
installing these furnaces above their maximum rated altitude. This kit contains # 43-49, 55-58 gas
orifices. The orifices in the kit have been selected as a result of testing with the American Gas
Association. They will provide appropriate derating at the altitude listed in the High Altitude Charts
as shown in the installation instructions of the kit.

PRODUCT IDENTIFICATION
10
MODEL # MFG # DESCRIPTION
AFE18-60A N/A
Fossil Fuel Kit. The AFE18-60A control is designed for use where the indoor coil is located
above/downstream of a gas or fossil fuel furnace when used with a heat pump. It will operate with
single and two stage heat pumps 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 timed off delay when the compressor goes off.
EFR01 P1221001
P1221002F
External Filter Rack Kit. For use with Goodman® and Amana® Brand upflow furnaces. This kit
is intended to 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.
FSRKA-14
FSRKA-17
FSRKA-21
FSRKA-24
"A" Width Cab.
"B" Width Cab
"C" Width Cab
"D" Width Cab
Furnace Sound Reduction Kits. For use with Amana® Brand 33" chassis, 80% furnaces.
When installed, these kits could help to reduce the sound level be apprximatley two decibels.
FSRKG-14
FSRKG-17
FSRKG-21
FSRGA-24
"A" Width Cab.
"B" Width Cab
"C" Width Cab
"D" Width Cab
Furnace Sound Reduction Kits. For use with Goodman® Brand 33" chassis, 80% furnaces.
When installed, these kits could help to reduce the sound level be apprximatley two decibels.
FTK04 FTK04
Furnace Twinning Kit. This kit allows Goodman® or Amana® Brand single stage 80% gas
furnaces to operate at the same time from a single thermostat. The two furnaces to be "twinned"
must be the exact same model with their circulating air blowers set to deliver the same air flow at
the same time. This kit cannot be used to control more than two furnaces.
HANG20 N/A High Altitude Natural Gas Kit. The kit is designed to convert 80% gas furnace models
fired at 20,000 Btu's per cell for higher altitudes. This kit is required when installing these
furnaces above their maximum rated altitude.
HANG21 N/A High Altitude Natural Gas Kit. The kit is designed to convert 80% gas furnace models
fired at 20,000 Btu's per cell for higher altitudes. This kit is required when installing these
furnaces above their maximum rated altitude.
HA02 N/A
High Altitude Natural Gas Kit. The kit is designed to convert Goodman®, Amana® Brand gas
furnace models fired at 22,500 BTU's per cell for higher altitudes. This kit is required when
installing these furnaces above their maximum rated altitude. This kit contains # 43-49, 55-58 gas
orifices. The orifices in the kit have been selected as a result of testing with the American Gas
Association. They will provide appropriate derating at the altitude listed in the High Altitude Charts
as shown in the installation instructions of the kit.

ACCESSORIES
11
MODEL
NUMBER
EFR01
AFE180-60A
AMU / GMU
ASAS / GSAS
SBT14 SBT17 SBT21
LPM-06
LPLP02 LPLP03
FTK04
HA02
HANG20 HANG21
MVK-01 MVK-02
FSRKG14 FSRKG17 FSRKG21 FSRKG24
Description
EFR External Filter Rack
Dual Fuel Board
Media Air Cleaners
Electronic Air Cleaner
Downflow Subbase
14"
Downflow Subbase
17.5"
Downflow Subbase
21"
Propane Gas
Conversion Kit
LP Low Pressure Shut
Off Kit
Twinning Kit
High Altitude Orifice Kit
High Altitude Orifices
W/Pressure Switch
High Altitude Orifices
W/Pressure Switch
Masonry Vent Kit Masonry Vent Kit
Sound Reduction Kit Sound Reduction Kit Sound Reduction Kit Sound Reduction Kit
GMH80403A** ···· (1) ··(4) (2) (3) ·(4)
GMH80603A** ···· (1) ··(4) (2) (3) ·(4)
GMH80604B** ···· (1) ··(4) (2) (3) ·(4)
GMH80803B** ···· (1) ··(4) (2) (3) ·(4)
GMH80804B** ···· (1) ··(4) (2) (3) ·(4)
GMH80805C** ···· (1) ··(4) (2) (3) ·(4)
GMH81005C** ···· (1) ··(4) (2) (3) ·(4)
GMH81205D** ···· (1) ··(4) (5) ·(4)
GMH81405DNC* ···· (1) ··· (5) ··
GDH80403A** ···· (1) ··(4) (2) (3)
GDH80603A** ···· (1) ··(4) (2) (3)
GDH80804B** ··· · (1) ··(4) (2) (3)
GDH81005C** ··· ·(1) ··(4) (2) (3)
·approved for this model
(1) W/R & HW 2 stg valve
(2)BA REV 4,500 - 10,000 FT (excluding GMH81205D*BA)
(3)BB REV 5,500 - 10,000FT
GOODMAN®BRAND "H" Model Furnace Accessories
(4) AA Rev
(5)GMH81205D*BAandGMH81405D*CD 5,500FT - 10,000FT
not approved for this model

ACCESSORIES
12
MODEL
NUMBER
EFR01
AFE180-60A
AMU / GMU
ASAS / GSAS
SBT14 SBT17 SBT21
LPM-06
LPLP02 LPLP03
FTK04
HA02
HANG20 HANG21
MVK-01 MVK-02
FSRKA14 FSRKA17 FSRKA21 FSRKA24
Description
EFR External Filter Rack
Dual Fuel Board
Media Air Cleaners
Electronic Air Cleaner
Downflow Subbase
14"
Downflow Subbase
17.5"
Downflow Subbase
21"
Propane Gas
Conversion Kit
LP Low Pressure Shut
Off Kit
Twinning Kit
High Altitude Orifice Kit
High Altitude Orifices
W/Pressure Switch
High Altitude Orifices
W/Pressure Switch
Masonry Vent Kit Masonry Vent Kit
Sound Reduction Kit Sound Reduction Kit Sound Reduction Kit Sound Reduction Kit
AMH80403A** ···· (1) ··(4) (2) (3) ·(4)
AMH80603A** ···· (1) ··(4) (2) (3) ·(4)
AMH80604B** ···· (1) ··(4) (2) (3) ·(4)
AMH80803B** ···· (1) ··(4) (2) (3) ·(4)
AMH80804B** ···· (1) ··(4) (2) (3) ·(4)
AMH80805C** ···· (1) ··(4) (2) (3) ·(4)
AMH81005C** ···· (1) ··(4) (2) (3) ·(4)
AMH81205D** ···· (1) ··(4) (5) ·(4)
AMH81405DNC* ···· (1) ·····
ADSH800403A** ···· (1) ·· ·
ADSH800603A** ···· (1) ·· ·
ADSH800804B** ··· · (1) ·· ·
ADSH801005C** ··· ·(1) ·· ·
·approvedfor this model
(1) W/R & HW 2 stg valve
(2)BA REV 4,500 - 10,000 FT (excluding GMH81205D*BA)
(3)BB REV 5,500 - 10,000 FT
(4) AA Rev
not approved for this model
(5)GMH81205D*BA 5,500 FT - 10,000 FT
AMANA®BRAND "H" Model Furnace Accessories

ACCESSORIES
13
EXTERNAL FILTER RACK KIT
( EFR01 )
BLOWER DECK
SCREWS
SLOTS IN FILTER
CLEAR SCREWS
ON UNIT
FRONT
OF UNIT
RETURN AIR
CUTOUT AREA LOWER EDGE
SCREW
FILTER RACK ASSEMBLY
(FACE FILTER OPENING
TOWARDS FRONT
OF UNIT)
UNIT SIDE
PANEL
BASE
OF UNIT
EFR01 EXTERNAL FILTER RACK KIT
Used on 80% Upflow Model Furnaces

ACCESSORY WIRING 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.
14
+5VDC
24VAC
G
POWER SUPPLY
INPUT
POWER SUPPLY COMMON
OUT TO HPCONTROL
P3-1
6.8K
P3-7
Y-HP
P1-6
P1-4
COMPRESSOR OUTPUT
P1-7
O
POWER SUPPLY OUT
TO THERMOSTAT
24VAC
Q2
K3
W1
POWER SUPPLY INPUT
(COMMON)
+VDC
E/W1
Y
P2-8
CALL FOR
REVERSING VALVE
P3-5
C
C
BLOWER FAN DEMAND
OUTPUT
P3-3
P1-8
Y-STAT
Y-FURN
C
P3-2
P1-1
P3-8
REVERSING VALVE
OUTPUT
BREAK FOR ODT
FURNACE DEMAND
OUTPUT
P1-3
R
24VAC
K4
HP CALL FOR FURNACE
(DURING DEFROST)
W2
Y2-STAT
Y2-FURN
CALL FOR
COMPRESSOR
P2-7
P3-6
+VDC
Y2
O
REVERSING
VALVE OUTPUT
Q1
Y
P2-4
K1
OT-NO
Y
P2-9
CALL FOR 2ND STAGE
COMPRESSOR
Y2
1.0K
G-FURN
P2-1
C
OT-C
C
SECOND STAGE
COMPRESSOR OUTPUT
G
CALL FOR
EMERGENCY HEAT
W1-FURN
W2-HP
F1 3A
OT-NC
24VAC
2ND STAGE COMPRESSOR
DEMAND OUTPUT
W1
CALL FOR
FURNACE HEAT
6.8K
G-STAT
+VDC
P3-4
F
U
R
N
A
C
E
P2-6
K2
ODT (OUTDOOR
THERMOSTAT)
Y
R
SECOND STAGE FURNACE
DEMAND OUTPUT
MICROPROCESSOR
Y2-HP
P1-5
CALL FOR 2ND STAGE
FURNACE HEAT
O
W2
CALL FOR
BLOWER FAN
T
H
E
R
M
O
S
T
A
T
P2-5
1 2
R
Y2
POWER
SUPPLY
COMPRESSOR
CONTACTOR OUTPUT
O
H
E
A
T
P
U
M
P
P2-3
+5VDC
W2
P3-9
P2-2
E
POWER SUPPLY COMMON
OUT TO THERMOSTAT
POWER SUPPLY OUT
TO HP CONTROL
C
P1-2
ALL FUEL SYSTEM CONTROL BOARD - AFE18-60A
This wiring diagram is for reference only. Not all wiring is as shown above.
Referto theappropriate wiringdiagram fortheunitbeingserviced.
(ForusewithHeatPumpsinconjunctionwith80%or90%Single-StageorTwo-StageFurnaces)

ACCESSORY WIRING DIAGRAMS
15
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.
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)

16
OPERATING INSTRUCTIONS
gas. If you then smell gas, STOP!above on this label. Follow "B" in the safety information
above on this label. If you don't smell
8. Move the gas control switch or knob
9. Replace control access panel.
gas, go to the next step.
technician or gas supplier.
11. Set the thermostat to the desired
12. If the appliance will not operate,
To Appliance" and call your service
5. Replace control access panel.
to "OFF". Do not force.
follow the instructions "To Turn Off Gas
4. Move the gas control switch or knob
Do not store or use gasoline or
other flammable vapors and liquids in the vicinity of this
TO TURN OFF GAS TO APPLIANCE
10. Turn on all electric power to the
FOR YOUR SAFETY
or any other appliance.
2. Turn off all electric power to the
appliance if service is to be performed.
1. Set the thermostat to its lowest setting.
3. Remove control access panel.
automatic ignition system which
4. This appliance is equipped with an
3. Turn off all electric power to the
2. Set the thermostat to lowest setting.
5. Remove control access panel.
try to light the burners by hand.
6. Move the gas control switch or knob
automatically lights the burners. Do not
to "OFF".
appliance.
setting.
appliance.
to "ON".
0140F00001P
SWITCH SHOWN
IN "ON" POSITION
GAS CONTROL
Force or attempted repair may result in
FOR YOUR SAFETY READ BEFORE OPERATING
call the fire department.
damage, personal injury or loss of life.
If you cannot reach your gas supplier,
a fire or explosion may result causing property
If you do not follow these instructions exactly,
which has been under water.
C. Use only your hand to move the gas
control switch or knob. Never use
tools. If the gas control switch or knob
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
7. Wait five (5) minutes to clear out any
will not operate, don't try to repair it,
call a qualified service technician.
is heavier than air and will settle on the
Immediately call your supplier
the gas suppliers instructions.
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
from a neighbor's phone. Follow
1. STOP! Read the safety information
OPERATING INSTRUCTIONS
floor.
building.
a fire or explosion.
try to light the burners by hand.
smell next to the floor because some gas
the appliance area for gas. Be sure to
B. BEFORE OPERATING smell around
automatically lights the burners. Do not
is equipped with an ignition device which
A. This appliance does not have a pilot. It
reproductive harm.
This product contains
fiberglass insulation.
cancer.
California to cause
contains a chemical
Fiberglass insulation
instructions and local
If notWARNING:
cause cancer, birth
defects or other
in fuel combustion
you to substances
death or serious
which can cause
State of California to
are known to the
illness and which
accordance with the
and maintained in
instructions, this
product could expose
manufacturer's
installed, operated
For outdoor
PGB & PGJ
For indoor installation.
of local codes, follow
codes. In the absence
Code, ANSI Z223.1.
the National Fuel Gas
installation only.
cause injury or
consult a qualified
Refer to the user's
information manual
provided with this
property damage.
This furnace must be
or the gas supplier.
alteration, service or
maintenance can
WARNING: Improper

17
OPERATING INSTRUCTIONS
CONSIGNES DE SECURITE - LIRE
AVANT D'ALLUMER L'APPAREIL
AVERTISSEMENT: Le non-respect des instructions qui suivent peut
entrainer un risque d'incendie ou d'explosion causant des dommages,
des blessures ou la mort.
A. Cet appareil comporte pas de veilleuse. Il est muni d'un mecanisme qui allume
automatiquement le bruleur. N'allumez paz le bruleur manuellement.
B. Sentir tout autour de l'apparielAVANT D'ALLUMER afin de deceler toute fuite de gaz.
Assurez-vous de sentir tout pres du plancher car certains gaz sont plus lourds que l'air
et se deposeront sur le plancher.
SI VOUS SENTEZ UNE ODEUR DE GAZ:
Ne tentez d'allumer aucun appariel.
Ne touchez pas auxinterrupteurs electriques; n'utiliser aucun telephone
dans l'edifice ou vous vous trouvez.
Appelez immediatement votre fournisseur de gaz en utilisant le telephone
d'un voisin et suivez les instructions du fournisseur.
Appelez les pompiers si vous ne parvenez pas a rejoindre votre fournisseur
de gaz.
C. N'utiliser que votre main pour pousser ou tourner le commande du gaz. N'utilisez
jamais d'outils. Si vous ne parvenez pas a pousser ou a tourner la commande, ne tentez
pas de la reparer; appelez un reparateur qualifie. Forcer la commande ou essayer de la
reparer peut entrainer un risque d'incendie ou d'explosion.
D. N'utilisez pas cet appareil si l'une de ses parties a ete dans l'eau. Si cela se produit,
demandez immediatement a un reparateur qualifie d'inspecter l'appareil et de remplacer
toute piece du systeme de controle et toute commande de gaz ayant ete dans l'eau.
0140F00002P
INSTRUCTIONS DE SERVICE
1. UN INSTANT! Lisez d'abord les consignes
2. Reglez le thermostat a son point le plus bas.
3. Coupez l'alimentation electrique de l'appareil.
4. Cet appareil est muni d'un mecanisme qui
allume automatiquement le bruleur. Ne tentez
pas d'allumer le bruleur manuellement.
5. Retirez lepanneau d'acces de la commande.
6. Mettez la commande de gaz a la position
7. Attendez cinq (5) minutes afin de permettre a
tout gaz present d'etre evacue. Si vous sentez
une odeur de gaz a ce moment, ARRETEZ! et
suivez les consignes de securite donnees au
de gaz, passez a l'etape suivante.
8. Mettez la commande de gaz a la position
en place.
10. Retablissez l'alimenation electrique de l'appareil.
11. Reglez le thermostat a le temperature desiree.
12. Si l'appareil ne fonctionne pas, suivez les
instructions intitulees "Arret du gaz" et appelez un
reparateur qualifie ou votre fournisseur de gaz.
ARRET DU GAZ
1. Reglez le thermostat a son point le plus bas.
2. Coupez l'alimentation electrique de l'appareil si vous devez effectuer un entretien.
3. Retirez le panneau d'acces de la commande.
4. Mettez la commande de gaz a la positionARRET("OFF").
5. Remettez le panneau d'acces de la commande en place.
de securite ci-dessus.
ARRET ("OFF").
paragraphe B ci-dessus. Si vous ne sentez pas
MARCHE ("ON").
9. Remettez la panneau d'acces de la commande
^^
^
^
^
^
^
^
^
^
^
^
^
Commande de
"MARCHE"
gaz en position

18
OPERATING INSTRUCTIONS
DU GAZ
ARRIVEE
INLET
GAS
IN "ON" POS
LEVER
SHOWN
MANUAL
GAS
"ON/MARCHE"
MANUEL,
EN POS
ROBINET
A GAZ

PRODUCT DESIGN
19
Safety
Please adhere to the following warnings and cautions
when installing, adjusting, altering, servicing, or oper-
ating the furnace.
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
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 touch-
ing unit. An electrostatic discharge can adversely affect
electrical components.
Use the following precautions during furnace installa-
tion and servicing to protect the integrated control mod-
ule 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 ap-
plicable 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 elec-
trostatic 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 wir-
ing following the discharge process in Step 2. Use
caution not to recharge your body with static elec-
tricity; (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 con-
tainer. Follow Steps 1 through 3 if installing the con-
trol on a furnace. Return any old or new controls to
their containers before touching any ungrounded ob-
ject.
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 applica-
tions.
This furnace can be used in the following non-industrial
commercial applications: Schools, Office buildings, Churches,
Retail stores, Nursing homes, Hotels/motels, Common or
office areas. In such applications, the furnace must be installed
with the installationinstructions.
Goodman®& Amana®Brand 80% furnaces are ETL certi-
fied appliances and are appropriate for use with natural
or propane gas. (NOTE: If using propane gas, a propane
conversion kit is required).
IMPORTANT NOTE: The 80% furnace cannot be in-
stalled as a direct vent (i.e.., sealed combustion) fur-
nace. The burner box is present only to help reduce
sound transmission from the burners to the occupied
space.
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 lo-
cal building codes and ordinances. In their absence, fol-
low the latest edition of the National Fuel Gas Code
(NFPA 54/ANSI Z223.1), and/or CAN/CGA B149 Installa-
tion Codes, local plumbing or waste water codes, and
other applicable codes.
A copy of the National Fuel Gas Code (NFPA 54/ANSI
Z223.1) can be obtained from any of the following:
American National Standards Institute
25 West 43rd Street, 4th Floor
New York, NY 10036

PRODUCT DESIGN
20
National Fire Protection Association
1 Batterymarch Park
Quincy, MA 02269-7471
CSA International
8501 East Pleasant Valley
Cleveland, OH 44131
A copy of the CAN/CGA B149 Installation Codes can be
obtained from:
CSA International
178 Rexdale Boulevard
Etobicoke, Ontario, Canada M9W, 1R3
The rated heating capacity of the furnace should be
greater than or equal to the total heat loss of the area
to be heated. The total heat loss should be calculated
by an approved method or in accordance with “ASHRAE
Guide” or “Manual J-Load Calculations” published by the
Air Conditioning Contractors of America.
Location Requirements and Considerations
WARNING
TO PREVENT POSSIBLE EQUIPMENT DAMAGE, PROPERTY DAMAGE, PERSONAL
INJURY OR DEATH, THE FOLLOWING BULLET POINTS MUST BE OBSERVED
WHEN INSTALLING THE UNIT.
Follow the instructions listed below when selecting a
furnace location. Refer also to the guidelines provided
in the Combustion and Ventilation Air Requirements sec-
tion 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.
• If the furnace is installed in an application where
the typical operating sound level of a furnace is
deemed objectionable, an optional sound reduc-
tion kit is available. Consult your local distribu-
tor for more details.
• Provide provisions for venting combustion prod-
ucts outdoors through a proper venting system.
Special consideration should be given to vent/flue
pipe routing and combustion air intake pipe when
applicable.
80% Furnaces: All installations must be vented in
accordance with National Fuel Gas Code, NFPA 54/
ANSI Z223.1 - lateset edition. In Canada the fur-
naces must be vented in accordance with the Na-
tional Standard of Canada, CAN/CGA B149.
• Ensure upflow or horizontal furnaces are not in-
stalled directly on carpeting, or any other com-
bustible material. The only combustible material
allowed is wood.
• A special accessory subbase must be used for up-
right counterflow unit installations over any com-
bustible material (including wood). Refer to sub-
base instructions for installation details. (NOTE:
A subbase will not be required if an air condition-
ing coil is located beneath the furnace between
the supply air opening and the combustible floor.
• Exposure to contaminated combustion air will re-
sult in safety and performance-related problems.
Do not install the furnace where the combustion
air is exposed to the following substances:
chlorinated waxes or cleaners
chlorine-based swimming pool chemicals
water softening chemicals
deicing salts or chemicals
carbon tetrachloride
halogen type refrigerants
cleaning solutions (such as perchloroethylene)
printing inks
paint removers
varnishes
hydrochloric acid
cements and glues
antistatic fabric softeners for clothes dryers
and masonry acid washing materials
• Seal off a non-direct vent furnace if it is installed
near an area frequently contaminated by any of
the above substances. This protects the non-di-
rect vent furnace from airborne contaminants. To
ensure that the enclosed non-direct vent furnace
has an adequate supply of combustion air, vent
from a nearby uncontaminated room or from out-
doors. Refer to the Combustion and Ventilation
Air Requirements section in this manual or the in-
stallation instructions for details.
• 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 ex-
changer 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 igni-
tion source are located not less than 18 inches
(457 mm) above the floor. Protect the furnace from
physical damage by vehicles.