Goodman MH8 User manual
5151 San Felipe Suite 500 • Houston, TX 77056
www.goodmanmfg.com • www.amana-hac.com
CUS
®
ATTENTION INSTALLING PERSONNEL
RECOGNIZE THIS SYMBOL AS A SAFETY PRECAUTION.
Installer: Affix all manuals adjacent to the unit.
These furnaces comply with requirements
embodied in the American National Stan-
dard / National Standard of Canada ANSI
Z21.47·CSA-2.3 Gas Fired Central Furnaces.
As a professional installer, you have an obligation to know the product better than the customer.
This includes all safety precautions and related items.
Priortoactualinstallation,thoroughlyfamiliarizeyourselfwiththisInstructionManual.
Pay special attention to all safety warnings. Often during installation or repair, it is possible to place yourself
in a position which is more hazardous than when the unit is in operation.
Remember, it is your responsibility to install the product safely and to know it well enough
to be able to instruct a customer in its safe use.
Safety is a matter of common sense...a matter of thinking before acting.
Most dealers have a list of specific, good safety practices...follow them.
The precautions listed in this Installation Manual are intended as supplemental to existing practices.
However, if there is a direct conflict between existing practices and the content of this manual,
the precautions listed here take precedence.
NOTE: Please contact your distributor or our website for the applicable Specification Sheet
referred to in this manual.
G
OODMAN
WILL
NOT
BE
RESPONSIBLE
FOR
ANY
INJURY
OR
PROPERTY
DAMAGE
ARISING
FROM
IMPROPER
SERVICE
OR
SERVICE
PROCEDURES
.
I
F
YOU
INSTALL
OR
PERFORM
SERVICE
ON
THIS
UNIT
,
YOU
ASSUME
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
©2009 Goodman Manufacturing Company, L.P.
IO-359C 9/09
II
II
I
NSTNST
NSTNST
NST
ALLAALLA
ALLAALLA
ALLA
TIONTION
TIONTION
TION
II
II
I
NSTRUCNSTRUC
NSTRUCNSTRUC
NSTRUCTIONSTIONS
TIONSTIONS
TIONS
FORFOR
FORFOR
FOR
*M(H,S)8 / *D(H,S)8 / *HS8 / GME8 G*M(H,S)8 / *D(H,S)8 / *HS8 / GME8 G
*M(H,S)8 / *D(H,S)8 / *HS8 / GME8 G*M(H,S)8 / *D(H,S)8 / *HS8 / GME8 G
*M(H,S)8 / *D(H,S)8 / *HS8 / GME8 G
ASAS
ASAS
AS
FF
FF
F
URNAURNA
URNAURNA
URNACECE
CECE
CE
(CATEGORY I )
2
Table of Contents
SAFETY PRECAUTIONS................................................................................................................................. 4
ADDITIONAL SAFETY CONSIDERATIONS ...................................................................................................... 5
SHIPPING INSPECTION ........................................................................................................................... 5
ELECTROSTATIC DISCHARGE (ESD)PRECAUTIONS ..................................................................................... 5
TOTHE INSTALLER .............................................................................................................................. 5
IMPORTANT NOTE TO THE OWNER REGARDING PRODUCT WARRANTY................................................................. 5
PRODUCT APPLICATION ............................................................................................................................... 6
LOCATION REQUIREMENTS AND CONSIDERATIONS ................................................................................................ 7
CLEARANCES AND ACCESSIBILITY ............................................................................................................ 8
HORIZONTAL INSTALLATION .................................................................................................................... 8
FURNACE SUSPENSION .......................................................................................................................... 8
EXISTING FURNACE REMOVAL ................................................................................................................ 8
THERMOSTAT LOCATION ........................................................................................................................ 9
COMBUSTION AND VENTILATION AIR REQUIREMENTS ............................................................................................ 9
CATEGORY IVENTING (VERTICAL VENTING) ...................................................................................................... 9
EXTERIOR MASONRY CHIMNEYS (CATEGORY IFURNACES ONLY)......................................................................... 10
CHECKLIST SUMMARY .........................................................................................................................11
CHECK 1 -PROPER CHIMNEY TERMINATION. ..............................................................................................11
CHECK 2-ANY SOLID OR LIQUID FUEL APPLIANCES VENTED INTO THIS CHIMNEY CHANNEL ...................................... 12
CHECK 3- CHIMNEY CROWN CONDITION................................................................................................. 12
CHECK 4- DEBRIS IN CLEANOUT .......................................................................................................... 12
CHECK 5- LINER CONDITION................................................................................................................ 12
CHECK 6-DILUTION AIR. ................................................................................................................... 13
CHECK 7-COMPLETE THE INSTALLATION. ............................................................................................... 13
FIX 1 -LINER TERMINATION ................................................................................................................. 13
FIX 2-CHANGE VENTING ARRANGEMENTS ............................................................................................... 13
FIX 3 -REBUILD THE CROWN ............................................................................................................... 13
FIX 4- RELINING .............................................................................................................................. 14
ELECTRICAL CONNECTIONS ........................................................................................................................ 14
WIRING HARNESS .............................................................................................................................. 15
115VOLT LINE CONNECTIONS ............................................................................................................. 15
FOSSIL FUEL APPLICATIONS ................................................................................................................ 15
JUNCTION BOX RELOCATION ................................................................................................................ 15
24VOLT THERMOSTAT WIRING ............................................................................................................ 16
SETTING THE HEAT ANTICIPATOR ........................................................................................................... 16
115 VOLT LINE CONNECTION OF ACCESSORIES ........................................................................................ 16
(ELECTRONIC AIR CLEANER) ................................................................................................................ 16
24VAC HUMIDIFIER .......................................................................................................................... 16
GAS SUPPLY AND PIPING ........................................................................................................................... 17
HIGH ALTITUDE DERATE ...................................................................................................................... 17
PROPANE GAS CONVERSION ................................................................................................................ 17
GAS PIPING CONNECTIONS .................................................................................................................. 17
UPFLOW INSTALLATIONS ..................................................................................................................... 18
COUNTERFLOW INSTALLATIONS.............................................................................................................. 18
GAS PIPING CHECKS ......................................................................................................................... 19
PROPANE GAS TANKS AND PIPING......................................................................................................... 19
CIRCULATING AIR AND FILTERS .................................................................................................................... 20
FILTERS - READ THIS SECTION BEFORE INSTALLING THE RETURN AIR DUCTWORK ............................................ 20
UPRIGHT INSTALLATIONS ..................................................................................................................... 20
CIRCULATION AIR FILTERS ................................................................................................................... 20
HORIZONTAL INSTALLATIONS ................................................................................................................ 20
3
Table of Contents
SEQUENCE OF OPERATION (INTEGRATED IGNITION CONTROL) ................................................................................ 20
POWER UP...................................................................................................................................... 20
HEATING MODE ................................................................................................................................. 21
(MODE DIP SWITCH IS SET TO “1 STG” POSITION).................................................................................. 21
(MODE DIPSWITCH IS SET TO “2 STG” POSITION)................................................................................. 21
COOLING MODE ................................................................................................................................21
FAN ONLY MODE .............................................................................................................................. 21
START-UP PROCEDURE AND ADJUSTMENT ....................................................................................................... 22
FURNACE OPERATION .......................................................................................................................... 22
FURNACE START-UP ........................................................................................................................... 22
FURNACE SHUTDOWN ......................................................................................................................... 22
GAS SUPPLY PRESSURE MEASUREMENT .................................................................................................. 22
GAS MANIFOLD PRESSURE MEASUREMENT ANDADJUSTMENT ....................................................................... 24
GAS INPUT RATE MEASUREMENT (NATURAL GAS ONLY) ............................................................................ 26
TEMPERATURE RISE ........................................................................................................................... 26
CIRCULATOR BLOWER SPEED ADJUSTMENT ............................................................................................. 26
CIRCULATOR BLOWER FAN TIMING ADJUSTMENT ...................................................................................... 27
OPERATIONAL CHECKS .............................................................................................................................. 27
BURNER FLAME ................................................................................................................................27
AUXILIARY LIMIT CONTROL ................................................................................................................. 27
SAFETY CIRCUIT DESCRIPTION .................................................................................................................... 27
GENERAL ......................................................................................................................................... 27
APPENDIX......................................................................................................................................... 28
TROUBLESHOOTING CHART .................................................................................................................. 28
BLOWER PERFORMANCE DATA ............................................................................................................. 31
*M(H/S)8................................................................................................................................. 31
*(D/H)S8 ................................................................................................................................. 32
GME8 ..................................................................................................................................... 33
WIRING DIAGRAM ............................................................................................................................. 34
*(M, D)H8/GME8 WIRING DIAGRAM ........................................................................................... 34
*(M, D, H)S8 WIRING DIAGRAM .................................................................................................. 35
GME8 WIRING DIAGRAM ............................................................................................................ 36
4
SS
SS
S
AFETAFET
AFETAFET
AFETYY
YY
Y
PP
PP
P
RECREC
RECREC
RECAA
AA
AUTIONSUTIONS
UTIONSUTIONS
UTIONS
Adhere to the following warnings and cautions when installing, adjusting, altering, servicing, or operating the furnace. To ensure proper
installation and operation, thoroughly read this manual for specifics pertaining to the installation and application of this product.
T
O
PREVENT
PERSONAL
INJURY
OR
DEATH
DUE
TO
IMPROPER
INSTALLATION
,
ADJUSTMENT
,
ALTERATION
,
SERVICE
OR
MAINTENANCE
,
REFER
TO
THIS
MANUAL
.F
OR
ADDITIONAL
ASSISTANCE
OR
INFORMATION
,
CONSULT
A
QUALIFIED
INSTALLER
,
SERVICER
AGENCY
OR
THE
GAS
SUPPLIER
.
WARNING
I
F
THE
INFORMATION
IN
THESE
INSTRUCTIONS
IS
NOT
FOLLOWED
EXACTLY
,
A
FIRE
OR
EXPLOSION
MAY
RESULT
CAUSING
PROPERTY
DAMAGE
,
PERSONAL
INJURY
OR
LOSS
OF
LIFE
.
D
O
NOT
STORE
OR
USE
GASOLINE
OR
OTHER
FLAMMABLE
VAPORS
AND
LIQUIDS
IN
THE
VICINITY
OF
THIS
OR
ANY
OTHER
APPLIANCE
.
D
O
NOT
TRY
TO
LIGHT
ANY
APPLIANCE
.
D
O
NOT
TOUCH
ANY
ELECTRICAL
SWITCH
;
DO
NOT
USE
ANY
PHONE
IN
YOUR
BUILDING
.
I
MMEDIATELY
CALL
YOUR
GAS
SUPPLIER
FROM
A
NEIGHBOR
’
S
PHONE
.F
OLLOW
THE
GAS
SUPPLIER
’
S
INSTRUCTIONS
.
I
F
YOU
CANNOT
REACH
YOUR
GAS
SUPPLIER
,
CALL
THE
FIRE
DEPARTMENT
.
I
NSTALLATION
AND
SERVICE
MUST
BE
PERFORMED
BY
A
QUALIFIED
INSTALLER
,
SERVICE
AGENCY
OR
THE
GAS
SUPPLIER
.
WHATTODOIFYOUSMELLGAS:
WARNING
T
HIS
PRODUCT
CONTAINS
OR
PRODUCES
A
CHEMICAL
OR
CHEMICALS
WHICH
MAY
CAUSE
SERIOUS
ILLNESS
OR
DEATH
AND
WHICH
ARE
KNOWN
TO
THE
S
TATE
OF
C
ALIFORNIA
TO
CAUSE
CANCER
,
BIRTH
DEFECTS
OR
OTHER
REPRODUCTIVE
HARM
.
WARNING
H
EATING
UNIT
SHOULD
NOT
BE
UTILIZED
WITHOUT
REASONABLE
,
ROUTINE
,
INSPECTION
,
MAINTENANCE
AND
SUPERVISION
.I
F
THE
BUILDING
IN
WHICH
ANY
SUCH
DEVICE
IS
LOCATED
WILL
BE
VACANT
,
CARE
SHOULD
BE
TAKEN
THAT
SUCH
DEVICE
IS
ROUTINELY
INSPECTED
,
MAINTAINED
AND
MONITORED
.
IN
THE
EVENT
THAT
THE
BUILDING
MAYBE
EXPOSED
TO
FREEZING
TEMPERATURES
AND
WILL
BE
VACANT
,
ALL
WATER
‐
BEARING
PIPES
SHOULD
BE
DRAINED
,
THE
BUILDING
SHOULD
BE
PROPERLY
WINTERIZED
,
AND
THE
WATER
SOURCE
CLOSED
.
IN
THE
EVENT
THAT
THE
BUILDING
MAY
BE
EXPOSED
TO
FREEZING
TEMPERATURES
AND
WILL
BE
VACANT
,
ANY
HYDRONIC
COIL
UNITS
SHOULD
BE
DRAINED
AS
WELL
AND
,
IN
SUCH
CASE
,
ALTERNATIVE
HEAT
SOURCES
SHOULD
BE
UTILIZED
.
WARNING
T
O
PREVENT
POSSIBLE
PROPERTY
DAMAGE
,
PERSONAL
INJURY
OR
DEATH
DUE
TO
ELECTRICAL
SHOCK
,
THE
FURNACE
MUST
BE
LOCATED
TO
PROTECT
THE
ELECTRICAL
COMPONENTS
FROM
WATER
.
WARNING
CARBON MONOXIDE POISONING HAZARD
-
Special Warning for Installation of Furnace or Air Handling Units in
Enclosed Areas such as Garages, Utility Rooms or Parking Areas
Carbon monoxide producing devices (such as an automobile, space
heater, gas water heater, etc.) should not be operated in enclosed areas
such as unventilatedgarages, utility rooms or parking areas because of
the danger of carbon monoxide (CO) poisoning resulting from the exhaust
emissions. If a furnace or air handler is installed in an enclosed area such
as a garage, utility room or parking area and a carbon monoxide producing
device is operated therein, there must be adequate, direct outside
ventilation.
This ventilation is necessary to avoid the danger of CO poisoning which
can occur if a carbon monoxide producing device continues to operate in
the enclosed area. Carbon monoxide emissions can be (re)circulated
throughout the structure if the furnace or air handler is operating in any
mode.
CO can cause serious illness including permanent brain damage or death.
B10259-216
S
HOULD
OVERHEATING
OCCUR
OR
THE
GAS
SUPPLY
FAIL
TO
SHUT
OFF
,
TURN
OFF
THE
MANUAL
GAS
SHUTOFF
VALVE
EXTERNAL
TO
THE
FURNACE
BEFORE
TURNING
OFF
THE
ELECTRICAL
SUPPLY
.
WARNING
P
OSSIBLE
PROPERTY
DAMAGE
,
PERSONAL
INJURY
OR
DEATH
DUE
TO
FIRE
,
EXPLOSION
,
SMOKE
,
SOOT
,
CONDENSATION
,
ELECTRICAL
SHOCK
OR
CARBON
MONOXIDE
MAY
RESULT
FROM
IMPROPER
INSTALLATION
,
REPAIR
OPERATION
,
OR
MAINTENANCE
OF
THIS
PRODUCT
.
WARNING
T
O
PREVENT
PERSONAL
INJURY
OR
DEATH
DUE
TO
IMPROPER
INSTALLATION
,
ADJUSTMENT
,
ALTERATION
,
SERVICE
OR
MAINTENANCE
,
REFER
TO
THIS
MANUAL
.F
OR
ADDITIONAL
ASSISTANCE
OR
INFORMATION
,
CONSULT
A
QUALIFIED
INSTALLER
,
SERVICER
AGENCY
OR
THE
GAS
SUPPLIER
.
WARNING
5
SS
SS
S
AFETAFET
AFETAFET
AFETYY
YY
Y
PP
PP
P
RECREC
RECREC
RECAA
AA
AUTIONSUTIONS
UTIONSUTIONS
UTIONS
T
O
PREVENT
PERSONAL
INJURY
OR
DEATH
DUE
TO
ASPHYXIATION
,
THIS
FURNACE
MUST
BE
C
ATEGORY
I
VENTED
.D
O
NOT
VENT
USING
C
ATEGORY
III
VENTING
.
P
ROVISIONS
MUST
BE
MADE
FOR
VENTING
COMBUSTION
PRODUCTS
OUTDOORS
THROUGH
A
PROPER
VENTING
SYSTEM
.T
HE
LENGTH
OF
FLUE
PIPE
COULD
BE
A
LIMITING
FACTOR
IN
LOCATING
THE
FURNACE
.
WARNING
AA
AA
ADDITIONALDDITIONAL
DDITIONALDDITIONAL
DDITIONAL SS
SS
SAFETYAFETY
AFETYAFETY
AFETY CC
CC
CONSIDERATIONSONSIDERATIONS
ONSIDERATIONSONSIDERATIONS
ONSIDERATIONS
• This furnace is approved for Category I Venting only.
• Provisions must be made for venting combustion products
outdoors through a proper venting system.The length of
flue pipe could be a limiting factor in locating the furnace.
SS
SS
SHIPPINGHIPPING
HIPPINGHIPPING
HIPPING II
II
INSPECTIONNSPECTION
NSPECTIONNSPECTION
NSPECTION
All units are securely packed in shipping containers tested accord-
ing to International SafeTransit Association specifications. The car-
ton must be checked upon arrival for external damage. If damage
is found, a request for inspection by carrier’s agent must be made in
writing immediately.
The furnace must be carefully inspected on arrival for damage and
bolts or screws which may have come loose in transit. In the event
of damage the consignee should:
1. Make a notation on delivery receipt of any visible damage to
shipment or container.
2. Notify carrier promptly and request an inspection.
3. With concealed damage, carrier must be notified as soon as
possible - preferably within five days.
4. File the claim with the following support documents within
a nine month statute of limitations.
• Original or certified copy of the Bill of Lading, or indemnity
bond.
• Original paid freight bill or indemnity in lieu thereof.
• Original or certified copy of the invoice, showing trade
and other discounts or reductions.
• Copy of the inspection report issued by carrier’s
representative at the time damage is reported to carrier.
The carrier is responsible for making prompt inspection of damage
and for a thorough investigation of each claim. The distributor or
manufacturer will not accept claims from dealers for transportation
damage.
Keep this literature in a safe place for future reference.Keep this literature in a safe place for future reference.
Keep this literature in a safe place for future reference.Keep this literature in a safe place for future reference.
Keep this literature in a safe place for future reference.
EE
EE
ELECTROSTATICLECTROSTATIC
LECTROSTATICLECTROSTATIC
LECTROSTATIC DD
DD
DISCHARGEISCHARGE
ISCHARGEISCHARGE
ISCHARGE (ESD) P(ESD) P
(ESD) P(ESD) P
(ESD) PRECAUTIONSRECAUTIONS
RECAUTIONSRECAUTIONS
RECAUTIONS
NONO
NONO
NOTE:TE:
TE:TE:
TE: Discharge body’s static electricity before touching unit. An
electrostatic discharge can adversely affect electrical components.
Use the following precautions during furnace installation and ser-
vicing to protect the integrated control module from damage. By
putting the furnace, the control, and the person at the same elec-
trostatic potential, these steps will help avoid exposing the inte-
grated control module to electrostatic discharge. This procedure is
applicable to both installed and non-installed (ungrounded) fur-
naces.
1. Disconnect all power to the furnace. Do not touch the
integrated control module or any wire connected to the
control prior to discharging your body’s electrostatic charge
to ground.
2. Firmly touch a clean, unpainted, metal surface of the furnaces
near the control. Any tools held in a person’s hand during
grounding will be discharged.
3. Service integrated control module or connecting wiring
following the discharge process in step 2. Use caution not
to recharge your body with static electricity; (i.e., do not
move or shuffle your feet, do not touch ungrounded objects,
etc.). If you come in contact with an ungrounded object,
repeat step 2 before touching control or wires.
4. Discharge your body to ground before removing a new
control from its container. Follow steps 1 through 3 if
installing the control on a furnace. Return any old or new
controls to their containers before touching any ungrounded
object.
TT
TT
TOO
OO
OTT
TT
THEHE
HEHE
HE II
II
INSTALLERNSTALLER
NSTALLERNSTALLER
NSTALLER
Before installing this unit, please read this manual thoroughly to
familiarize yourself with specific items which must be adhered to,
including but not limited to: unit maximum external static pressure,
gas pressures, BTU input rating, proper electrical connections, cir-
culating air temperature rise, minimum or maximum CFM, and motor
speed connections, and venting. These furnaces are designed for
Category I venting only.
T
O
PREVENT
PROPERTY
DAMAGE
,
PERSONAL
INJURY
OR
DEATH
DUE
TO
FIRE
,
DO
NOT
INSTALL
THIS
FURNACE
IN
A
MOBILE
HOME
,
TRAILER
,
OR
RECREATIONAL
VEHICLE
.
WARNING
II
II
IMPORTANTMPORTANT
MPORTANTMPORTANT
MPORTANT NN
NN
NOTEOTE
OTEOTE
OTE TOTO
TOTO
TO THETHE
THETHE
THE OO
OO
OWNERWNER
WNERWNER
WNER REGARDINGREGARDING
REGARDINGREGARDING
REGARDING PP
PP
PRODUCTRODUCT
RODUCTRODUCT
RODUCT WW
WW
WARAR
ARAR
AR--
--
-
RANTYRANTY
RANTYRANTY
RANTY
Your warranty certificate is supplied as a separate document with
the unit installed by your contractor. Read the limited warranty cer-
tificate carefully to determine what is and is not covered and keep
the warranty certificate in a safe place. If you are unable to locate
the warranty certificate please contact your installing contractor or
contact customer service (877-254-4729) to obtain a copy.
IMPORIMPOR
IMPORIMPOR
IMPORTT
TT
TANTANT
ANTANT
ANT::::: To receive the Lifetime Heat Exchanger Limited War-
ranty and the 10-year Parts Limited Warranty, online registration
must be completed within 60 days of installation. Online registra-
tion is not required in California or Quebec.
To register your Goodman brand unit, go to www.goodmanmfg.com.
Click on the word“Warranty” located on the left side of the home
page. Next, click on the word“Product Registration”located on the
left side of the Warranty page and complete the forms in the man-
ner indicated on the Product Registration page.
6
PP
PP
P
RR
RR
RODUCTODUCT
ODUCTODUCT
ODUCT
AA
AA
A
PPLICPPLIC
PPLICPPLIC
PPLICAA
AA
ATIONTION
TIONTION
TION
• 100% outside air is provided for combustion air
requirements during construction.Temporary ducting can
be used.
NOTE:NOTE:
NOTE:NOTE:
NOTE: Do not connect the temporary duct directly to the
furnace. The duct must be sized according to the
instructions under Combustion and Ventilation Air
Requirements, Section 5.3.3.
•The furnace heat exchanger, components, duct system,
air filters and evaporator coils are thoroughly cleaned
following final construction clean up.
• All furnace operating conditions (including ignition, input
rate, temperature rise and venting) are verified according
to these installation instructions.
NONO
NONO
NOTE:TE:
TE:TE:
TE: The Commonwealth of Massachusetts requires that the
following additional requirements must also be met:
• Gas furnaces must be installed by a licensed plumber or
gas fitter.
• AT-handle gas cock must be used.
• If the unit is to be installed in an attic, the passageway to
and the service area around the unit must have flooring.
T
O
PREVENT
PROPERTY
DAMAGE
,
PERSONAL
INJURY
OR
DEATH
DUE
TO
FIRE
,
DO
NOT
INSTALL
THIS
FURNACE
IN
A
MOBILE
HOME
,
TRAILER
,
OR
RECREATIONAL
VEHICLE
.
WARNING
TT
TT
To ensuro ensur
o ensuro ensur
o ensure pre pr
e pre pr
e proper furoper fur
oper furoper fur
oper furnacnac
nacnac
nace opere oper
e opere oper
e operaa
aa
ation, installtion, install
tion, installtion, install
tion, install, oper, oper
, oper, oper
, operaa
aa
att
tt
te and main-e and main-
e and main-e and main-
e and main-
tain the furnace in accordance with these installation and op-tain the furnace in accordance with these installation and op-
tain the furnace in accordance with these installation and op-tain the furnace in accordance with these installation and op-
tain the furnace in accordance with these installation and op-
eration instructions, all local building codes and ordinances.eration instructions, all local building codes and ordinances.
eration instructions, all local building codes and ordinances.eration instructions, all local building codes and ordinances.
eration instructions, all local building codes and ordinances. In
their absence, follow the latest edition of the National Fuel Gas
Code (NFPA 54/ANSI Z223.1), and/or CAN/CSA B149 Installation
Codes, local plumbing or waste water codes, and other applicable
codes.
A copy of the National Fuel Gas Code (NFPA 54/ANSI Z223.1) can
be obtained from any of the following:
American National Standards InstituteAmerican National Standards Institute
American National Standards InstituteAmerican National Standards Institute
American National Standards Institute
1430 Broadway
New York, NY 10018
National Fire Protection AssociationNational Fire Protection Association
National Fire Protection AssociationNational Fire Protection Association
National Fire Protection Association
1 Batterymarch Park
Quincy, MA 02269
CSA InternationalCSA International
CSA InternationalCSA International
CSA International
8501 East Pleasant Valley
Cleveland, OH 44131
A copy of the CAN/CSA B149 Installation Codes can also be ob-
tained from:
CSA InternationalCSA International
CSA InternationalCSA International
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
To register your Amana brand unit, go to www.amana-hac.com.
Click on the word“Warranty”located on the top right of the home
page. Next, click on the word“Product Registration”located on the
left side of the Warranty page and complete the forms in the man-
ner indicated on the Product Registration page.
Product limited warranty certificates can be viewed at
www.goodmanmfg.com or www.amana-hac.com. Each product
overview page contains a Product Warranty link; by clicking on it
you will be able to view the limited warranty coverage for that
specific product. To view warranty registration information, click on
the Product Warranty text on the left navigation panel on the home
page of each website. The Online Product Registration pages are
located in this same section.
PP
PP
P
RR
RR
RODUCTODUCT
ODUCTODUCT
ODUCT
AA
AA
A
PPLICPPLIC
PPLICPPLIC
PPLICAA
AA
ATIONTION
TIONTION
TION
This furnace is primarily designed for residential home-heating ap-
plications. It is NOT designed or certified for use in mobile homes,
trailers or recreational vehicles. Neither is it designed or certified
for outdoor applications. The furnace mustmust
mustmust
must be installed indoors
(i.e., attic space, crawl space, or garage area provided the garage
area is enclosed with an operating door).
This furnace can be used in the following non-industrial commer-
cial applications:
Schools, Office buildings, Churches, Retail stores,Schools, Office buildings, Churches, Retail stores,
Schools, Office buildings, Churches, Retail stores,Schools, Office buildings, Churches, Retail stores,
Schools, Office buildings, Churches, Retail stores,
Nursing homes, Hotels/motels, Common or office areasNursing homes, Hotels/motels, Common or office areas
Nursing homes, Hotels/motels, Common or office areasNursing homes, Hotels/motels, Common or office areas
Nursing homes, Hotels/motels, Common or office areas
In such applications , the furnace must be installed with the follow-
ing stipulations:
• It must be installed per the installation instructions provided
and per local and national codes.
• It must be installed indoors in a building constructed on
site.
• It must be part of a ducted system and not used in a free
air delivery application.
• It must not be used as a“make-up”air unit.
• All other warranty exclusions and restrictions apply.
This furnace may be used as a construction site heater ONLONL
ONLONL
ONLYY
YY
Yif the
following conditions are met:
• The vent system is permanently installed per these
installation instructions.
• A room thermostat is used to control the furnace. Fixed
jumpers that provide continuous heating CANNOT be
used.
• Return air ducts are provided and sealed to the furnace.
• A return air temperature range between 60ºF (16ºC) and
80ºF (27ºC) is maintained.
• Air filters are installed in the system and maintained during
construction, replaced as appropriate during construction,
and upon completion of construction are replaced.
• The input rate and temperature rise are set per the furnace
rating plate.
7
LL
LL
L
OCOC
OCOC
OCAA
AA
ATIONTION
TIONTION
TION
RR
RR
R
EQUIREMENTEQUIREMENT
EQUIREMENTEQUIREMENT
EQUIREMENTSS
SS
S
ANDAND
ANDAND
AND
CC
CC
C
ONSIDERONSIDER
ONSIDERONSIDER
ONSIDERAA
AA
ATIONSTIONS
TIONSTIONS
TIONS
with“ASHRAE Guide”or“Manual J-Load Calculations”published by
the Air Conditioning Contractors of America.
In the USA, this furnace MUST be installed in accordance with the
latest edition of the ANSI Z223.1 booklet entitled “National Fuel
Gas Code” (NFPA 54), and the requirements or codes of the local
utility or other authority having jurisdiction. In Canada, this furnace
must be installed in accordance with the current CAN/CGA-B149.1
& 2 Gas Installation Codes, local plumbing or waste water codes and
other applicable codes. Additional helpful publications available
from the NFPA are, NFPA 90A - Installation of Air Conditioning and
Ventilating System and NFPA 90B -Warm Air Heating and Air Condi-
tioning System.
All venting shall be in accordance with PART 7, Venting of Equip-
ment, of the National Fuel Gas Code, ANSI Z223.1, or applicable
local building and/or air conditioning codes. These publications are
available from:
National Fire Protection Association, Inc.
Batterymarch Park, Quincy, MA 02269
NOTE:NOTE:
NOTE:NOTE:
NOTE: Furnaces with NOx screens meet the California NOx emis-
sion standards and California seasonal efficiency standards. ANNUAL
inspections of the furnace and its vent system is strongly recom-
mended.
LL
LL
L
OCOC
OCOC
OCAA
AA
ATIONTION
TIONTION
TION
RR
RR
R
EQUIREMENTEQUIREMENT
EQUIREMENTEQUIREMENT
EQUIREMENTSS
SS
S
ANDAND
ANDAND
AND
CC
CC
C
ONSIDERONSIDER
ONSIDERONSIDER
ONSIDERAA
AA
ATIONSTIONS
TIONSTIONS
TIONS
Your unit model type determines which installation procedures must
be used. For *MH8, *MS8, and GHS8 models, you must follow in-
structions for Horizontal Left, Horizontal Right or Upflow installa-
tions only.These furnaces are not approved for Downflow installa-
tions.
Downflow models GD(H,S) ARE NOT APPROVED FOR HORIZON-GD(H,S) ARE NOT APPROVED FOR HORIZON-
GD(H,S) ARE NOT APPROVED FOR HORIZON-GD(H,S) ARE NOT APPROVED FOR HORIZON-
GD(H,S) ARE NOT APPROVED FOR HORIZON-
TT
TT
TAL OR UPFLAL OR UPFL
AL OR UPFLAL OR UPFL
AL OR UPFLOW INSTOW INST
OW INSTOW INST
OW INSTALLAALLA
ALLAALLA
ALLATIONSTIONS
TIONSTIONS
TIONS. For these models, use only the
instructions for downflow installation only.
T
O
PREVENT
POSSIBLE
EQUIPMENT
DAMAGE
,
PROPERTY
DAMAGE
,
PERSONAL
INJURY
OR
DEATH
,
THE
FOLLOWING
BULLET
POINTS
MUST
BE
OBSERVED
WHEN
INSTALLING
THIS
UNIT
.
WARNING
Follow the instructions listed below when selecting a furnace loca-
tion. Refer also to the guidelines provided in Section V, Combustion
and Ventilation Air Requirements.
• Centrally locate the furnace with respect to the proposed
or existing air distribution system.
• Ensure the temperature of the return air entering the
furnace is between 55°F and 100°F when the furnace is
heating.
• Provisions must be made for venting combustion products
outdoors through a proper venting system.The length of
flue pipe could be a limiting factor in locating the furnace.
• Ensure adequate combustion air is available for the furnace.
Improper or insufficient combustion air can expose
building occupants to gas combustion products that could
include carbon monoxide. Refer to Section V, Combustion
and Ventilation Air Requirements.
• The furnace must be level. If the furnace is to be set on a
floor that may become wet or damp at times, the furnace
should be supported above the floor on a concrete base
sized approximately 1-1/2" larger than the base of the
furnace.
• Ensure upflow or horizontal furnaces are not installed
directly on carpeting, or any other combustible material.
The only combustible material allowed is wood.
• Exposure to contaminated combustion air will result in
safety and performance-related problems. Do not install
the furnace where the combustion air is exposed to the
following substances:
chlorinated waxes or cleaners
chlorine-based swimming pool chemicals
water softening chemicals
deicing salts or chemicals
carbon tetrachloride
halogen type refrigerants
cleaning solutions (such as perchloroethylene)
printing inks
paint removers
varnishes
hydrochloric acid
cements and glues
antistatic fabric softeners for clothes dryers
and masonry acid washing materials
• 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.
• Do not connect this furnace to a chimney flue that serves
a separate appliance designed to burn solid fuel.
• For counterflow installations, the air conditioning coil must
be downstream from the heat exchanger of the furnace.
•Counterflow installation over a noncombustible floor.
Before setting the furnace over the plenum opening,
ensure the surface around the opening is smooth and
level. A tight seal should be made between the furnace
base and floor by using a silicon rubber caulking compound
or cement grout.
• Counterflow installation over a combustible floor. If
installation over a combustible floor becomes necessary,
use an accessory subbase (see Specification Sheet
applicable to your model for details). A special accessory
subbase must be used for upright counterflow unit
installations over any combustible material including
8
LL
LL
L
OCOC
OCOC
OCAA
AA
ATIONTION
TIONTION
TION
RR
RR
R
EQUIREMENTEQUIREMENT
EQUIREMENTEQUIREMENT
EQUIREMENTSS
SS
S
ANDAND
ANDAND
AND
CC
CC
C
ONSIDERONSIDER
ONSIDERONSIDER
ONSIDERAA
AA
ATIONSTIONS
TIONSTIONS
TIONS
FF
FF
FURNACEURNACE
URNACEURNACE
URNACE SS
SS
SUSPENSIONUSPENSION
USPENSIONUSPENSION
USPENSION
If suspending the furnace from rafters or joist, use 3/8" threaded
rod and 2”x2”x3/8”angle iron as shown below. The length of rod
will depend on the application and the clearances necessary.
Suspended Furnace
EE
EE
EXISTINGXISTING
XISTINGXISTING
XISTING FF
FF
FURNACEURNACE
URNACEURNACE
URNACE RR
RR
REMOVALEMOVAL
EMOVALEMOVAL
EMOVAL
NOTE:NOTE:
NOTE:NOTE:
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 Ameri-Ameri-
Ameri-Ameri-
Ameri-
can National Standard/National Standard of Canada for Gas-can National Standard/National Standard of Canada for Gas-
can National Standard/National Standard of Canada for Gas-can National Standard/National Standard of Canada for Gas-
can National Standard/National Standard of Canada for Gas-
Fired Central Furnaces ANSI Z21.47-Latest Edition, CSA-2.3-Fired Central Furnaces ANSI Z21.47-Latest Edition, CSA-2.3-
Fired Central Furnaces ANSI Z21.47-Latest Edition, CSA-2.3-Fired Central Furnaces ANSI Z21.47-Latest Edition, CSA-2.3-
Fired Central Furnaces ANSI Z21.47-Latest Edition, CSA-2.3-
LaLa
LaLa
Latt
tt
test Eest E
est Eest E
est Edition Sdition S
dition Sdition S
dition Secec
ecec
ection 1.23.1.tion 1.23.1.
tion 1.23.1.tion 1.23.1.
tion 1.23.1. The following steps shall be fol-
lowed 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 CAN/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 appliance 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
wood. Follow the instructions with the subbase for proper
installations. Do not install the furnace directly on carpeting,
tile, or other combustible material other than wood
flooring. (NONO
NONO
NOTETE
TETE
TE: The subbase will not be required if an air
conditioning coil is installed between the supply air
opening on the furnace and the floor.
Top - 1"
Side
Clearance - 1"
Back - 0"
Front Clearance - 3"
V
ent Pipe Clearance to Combustibles-
6" using Single Wall Connector or 1"
using B-1 vent.
• Adequate combustion/ventilation air must be supplied to
the closet.
• Furnace must be completelycompletely
completelycompletely
completely sealed to floor or base.
Combustion/ ventilation air supply pipes must terminate
12" from top of closet and 12" from floor of closet. DO
NOT remove solid base plate for side return.
• Return air ducts must be completelycompletely
completelycompletely
completelysealed to the furnace
and terminate outside the enclosure surfaces.
CC
CC
CLEARANCESLEARANCES
LEARANCESLEARANCES
LEARANCES ANDAND
ANDAND
AND AA
AA
ACCESSIBILITYCCESSIBILITY
CCESSIBILITYCCESSIBILITY
CCESSIBILITY
Unobstructed front clearance of 24" for servicingfor servicing
for servicingfor servicing
for servicing is recommended.
TOP
B1-VENT SINGLE (PLENUM)
1" 6" 1" 3" 0" 1"
VENT SIDES FRONT BACK
Top clearance for horizontal configuration - 1"
HH
HH
HORIZONTALORIZONTAL
ORIZONTALORIZONTAL
ORIZONTAL II
II
INSTALLATIONNSTALLATION
NSTALLATIONNSTALLATION
NSTALLATION
Line contact to framing is permitted when installed in the horizon-
tal configuration. Line contact is defined as the portion of the cabi-
net that is formed by the intersection of the top and side. ACCESSI-
BILITY CLEARANCE,WHERE GREATER, SHOULDTAKE PRECEDENCE
OVER MINIMUM FIRE PROTECTION CLEARANCE. A gas-fired furnace
for installation in a residential garage must be installed so that the
ignition source and burners are located not less than eighteen inches
(18") above the floor and is protected or located to prevent physical
damage by vehicles. A gas furnace must not be installed directly on
carpeting, tile, or other combustible materials other than wood floor-
ing.
9
CC
CC
C
OMBOMB
OMBOMB
OMBUU
UU
USTIONSTION
STIONSTION
STION
& V& V
& V& V
& V
ENTILENTIL
ENTILENTIL
ENTILAA
AA
ATIONTION
TIONTION
TION
CC
CC
C
AA
AA
ATEGORTEGOR
TEGORTEGOR
TEGORYY
YY
Y
I VI V
I VI V
I V
ENTINGENTING
ENTINGENTING
ENTING
AA
AA
A
IRIR
IRIR
IR
RR
RR
R
EQUIREMENTEQUIREMENT
EQUIREMENTEQUIREMENT
EQUIREMENTSS
SS
S
tested as outlined above, return doors, windows, exhaust
fans, fireplace dampers and any other gas burning
appliance to their previous conditions of use;
g. If improper venting is observed during any of the above
tests, the common venting system must be corrected.
Corrections must be in accordance with the latest edition of the
National Fuel Gas Code NFPA 54/ANSI Z223.1 and/or CAN/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 CAN/CSA B149 Installation Codes.
TT
TT
THERMOSTATHERMOSTAT
HERMOSTATHERMOSTAT
HERMOSTAT LL
LL
LOCATIONOCATION
OCATIONOCATION
OCATION
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, such as an
outside wall.
HOT
COLD
Thermostat Influences
Consult the instructions packaged with the thermostat for mount-
ing instructions and further precautions.
CC
CC
C
OMBOMB
OMBOMB
OMBUU
UU
USTIONSTION
STIONSTION
STION
ANDAND
ANDAND
AND
VV
VV
V
ENTILENTIL
ENTILENTIL
ENTILAA
AA
ATIONTION
TIONTION
TION
AA
AA
A
IRIR
IRIR
IR
RR
RR
R
EQUIREMENTEQUIREMENT
EQUIREMENTEQUIREMENT
EQUIREMENTSS
SS
S
T
O
AVOID
PROPERTY
DAMAGE
,
PERSONAL
INJURY
OR
DEATH
,
SUFFICIENT
FRESH
AIR
FOR
PROPER
COMBUSTION
AND
VENTILATION
OF
FLUE
GASES
MUST
BE
SUPPLIED
.M
OST
HOMES
REQUIRE
OUTSIDE
AIR
BE
SUPPLIED
INTO
THE
FURNACE
AREA
.
WARNING
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 heat-
ing/cooling costs but have created a problem supplying combus-
tion and ventilation air for gas fired and other fuel burning appli-
ances. Appliances that pull air out of the house (clothes dryers,
exhaust fans, fireplaces, etc.) increase the problem by starving ap-
pliances for air.
House depressurization can cause back drafting or improper com-
bustion of gas-fired appliances, thereby exposing building occu-
pants to gas combustion products that could include carbon mon-
oxide.
If this furnace is to be installed in the same space with other gas
appliances, such as a water heater, ensure there is an adequate
supply of combustion and ventilation air for the other appliances.
Refer to the latest edition of the National Fuel Gas Code NFPA 54/
ANSI Z223.1 or CAN/CSA B149 Installation Codes or applicable pro-
visions of the local building codes for determining the combustion
air requirements for the appliances.
This furnace must use indoor air for combustion. It cannot be installed
as a direct vent (i.e., sealed combustion) furnace.
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.
CC
CC
C
AA
AA
ATEGORTEGOR
TEGORTEGOR
TEGORYY
YY
Y
I VI V
I VI V
I V
ENTINGENTING
ENTINGENTING
ENTING
((
((
(
VV
VV
V
ERER
ERER
ERTICTIC
TICTIC
TICALAL
ALAL
AL
VV
VV
V
ENTINGENTING
ENTINGENTING
ENTING
))
))
)
T
O
PREVENT
POSSIBLE
PERSONAL
INJURY
OR
DEATH
DUE
TO
ASPHYXIATION
,
THIS
FURNACE
MUST
BE
C
ATEGORY
I
VENTED
.D
O
NOT
VENT
USING
C
ATEGORY
III
VENTING
.
WARNING
Category I Venting is venting at a non-positive pressure. A furnace
vented as Category I is considered a fan-assisted appliance and the
vent system does not have to be“gas tight.” NONO
NONO
NOTE:TE:
TE:TE:
TE: Single stage gas
furnaces with induced draft blowers draw products of combustion
through a heat exchanger allowing, in some instances, common
venting with natural draft appliances (i.e. water heaters). All instal-
lations must be vented in accordance with National Fuel Gas Code
NFPA 54/ANSI Z223.1 - latest edition. In Canada, the furnaces must
be vented in accordance with the National Standard of Canada,
CAN/CSA B149.1 and CAN/CSA B149.2 - latest editions and amend-
ments.
NONO
NONO
NOTE:TE:
TE:TE:
TE: The vertical height of the Category I venting system must be
at least as great as the horizontal length of the venting system.
T
O
PREVENT
POSSIBLE
PERSONAL
INJURY
OR
DEATH
DUE
TO
ASPHYXIATION
,
COMMON
VENTING
WITH
OTHER
MANUFACTURER
’
S
INDUCED
DRAFT
APPLIANCES
IS
NOT
ALLOWED
.
WARNING
10
EE
EE
E
XX
XX
XTERIORTERIOR
TERIORTERIOR
TERIOR
MASMAS
MASMAS
MASONRONR
ONRONR
ONRYY
YY
Y
CC
CC
C
HIMNEHIMNE
HIMNEHIMNE
HIMNEYY
YY
YSS
SS
S
- C- C
- C- C
- C
AA
AA
ATEGORTEGOR
TEGORTEGOR
TEGORYY
YY
Y
I FI F
I FI F
I F
URNAURNA
URNAURNA
URNACESCES
CESCES
CES
OO
OO
O
NLNL
NLNL
NL
YY
YY
Y
The minimum vent diameter for the Category I venting system is as
shown:
UPFLOW COUNTERFLOW
45 4 Inch 4 Inch
70 4 Inch 4 Inch
90 4 Inch 4 Inch
115 5 Inch 5 Inch
140 5 Inch N/A
MODEL MINIMUM VENT
Under some conditions, larger vents than those shown above may
be required or allowed. When an existing furnace is removed from a
venting system serving other appliances, the venting system may be
too large to properly vent the remaining attached appliances.
Upflow or Horizontal unitsUpflow or Horizontal units
Upflow or Horizontal unitsUpflow or Horizontal units
Upflow or Horizontal units are shipped with the induced draft
blower discharging from the top of the furnace. (“Top”is as viewed
for an upflow installation.) The induced draft blower can be rotated
90 degrees for Category I venting. For horizontal installations, a
four inch single wall pipe can be used to extend the induced draft
blower outlet 1/2”beyond the furnace cabinet. THIS PRTHIS PR
THIS PRTHIS PR
THIS PRODUCODUC
ODUCODUC
ODUCT IST IS
T IST IS
T IS
NONO
NONO
NOT DESIGNED FOR CT DESIGNED FOR C
T DESIGNED FOR CT DESIGNED FOR C
T DESIGNED FOR COUNTEROUNTER
OUNTEROUNTER
OUNTERCLCL
CLCL
CLOCKOCK
OCKOCK
OCKWISE INDUCED DRWISE INDUCED DR
WISE INDUCED DRWISE INDUCED DR
WISE INDUCED DRAFTAFT
AFTAFT
AFT
BLBL
BLBL
BLOWER ROWER R
OWER ROWER R
OWER ROO
OO
OTT
TT
TAA
AA
ATION.TION.
TION.TION.
TION.
Vent the furnace in accordance with the National Fuel Gas Code
NFPA 54/ANSI Z223.1 - latest edition. In Canada, vent the furnace
in accordance with the National Standard of Canada, CAN/CSA
B149.1 and CAN/CSA B149.2 - latest editions and amendments.
VentingVenting
VentingVenting
Venting
THIS FURNACE IS NOT DESIGN CERTIFIED TO BE HORIZONTALLY
VENTED.
To rotate the induced draft blower clockwise, you will need to pur-
chase one (0270F01119) chimney transition bottom kit.
1. Disconnect electrical power from the furnace.
2. Disconnect the induced draft blower power leads, flue pipe,
and pressure switch tubing.
3. Remove the round cutout from the right side of the wrapper.
4. Remove and save the four screws that fasten the induced
draft blower to the flue collector box.
5. Remove and save the three screws that hold the chimney
assembly to the induced draft blower.
6. Remove and save the four screws that fasten the chimney
top to the chimney bottom.
7. Remove the chimney transition bottom from the transition
bottom kit.
8. Install the chimney top with the four screws retained from
step 6 onto the new chimney transition bottom from the
transition bottom kit.
9. Install chimney assembly with the three screws retained
from step 5 onto the induced draft blower.
10. Reinstall the induced draft blower rotating it 90 degrees
clockwise from the original upflow configuration using the
four screws retained in step 3. Ensure the gasket located
between the induced draft blower and the collector box is
rotated accordingly.
11. Reconnect the induced draft blower power leads. NOTE: If
the wires are not long enough, pull extra wire from the wire
bundle in the blower compartment.
12. Reconnect the flue pipe, and the pressure switch tubing.
Ensure that all wires and the pressure switch tubing is at
least one inch from the flue pipe, or any other hot surface.
13. Restore power to furnace.
Counterflow unitsCounterflow units
Counterflow unitsCounterflow units
Counterflow units are shipped with the induced draft blower dis-
charging from the top of the furnace. (“Top”as viewed for a coun-
terflow installation.)
Vent the furnace in accordance with the National Fuel Gas Code
NFPA54/ANSI Z223.1-latest edition. In Canada, vent the furnace in
accordance with the national standard of Canada, CAN/CSA B149.1
and CAN/CSA B149.2- latest editions and amendments.
N
EVER
ALLOW
THE
PRODUCTS
OF
COMBUSTION
,
INCLUDING
CARBON
MONOXIDE
,
TO
ENTER
THE
RETURN
DUCTWORK
OR
CIRCULATION
AIR
SUPPLY
.
WARNING
EE
EE
E
XX
XX
XTERIORTERIOR
TERIORTERIOR
TERIOR
MM
MM
M
ASONRASONR
ASONRASONR
ASONRYY
YY
Y
CC
CC
C
HIMNEHIMNE
HIMNEHIMNE
HIMNEYY
YY
YSS
SS
S
((
((
(CC
CC
C
AA
AA
A
TEGORTEGOR
TEGORTEGOR
TEGORYY
YY
Y
I FI F
I FI F
I F
URNAURNA
URNAURNA
URNACESCES
CESCES
CES
OO
OO
O
NLNL
NLNL
NL
YY
YY
Y
))
))
)
An exterior masonry chimney is defined as a “Masonry” chimney
exposed to the outdoors on one or more sides below the roof line.”
The ability to use a clay lined masonry chimney depends on a pa-
rameter not associated with interior chimneys.This variable is the
geographic location of the installation. Researchers have discov-
ered that the winter design temperatures have a direct impact on
the suitability of this type of venting. In most situations, the existing
masonry chimneys will require a properly sized metallic liner.
P
OSSIBILITY
OF
PROPERTY
DAMAGE
,
PERSONAL
INJURY
OR
DEATH
DAMAGING
CONDENSATION
CAN
OCCUR
INSIDE
MASONRY
CHIMNEYS
WHEN
A
SINGLE
FAN
‐
ASSISTED
C
ATEGORY
I
APPLIANCE
(80%AFUE
FURNACE
)
IS
VENTED
WITHOUT
ADEQUATE
DILUTION
AIR
.D
O
NOT
CONNECT
AN
80%
FURNACE
TO
A
MASONRY
CHIMNEY
UNLESS
THE
FURNACE
IS
COMMON
VENTED
WITH
A
DRAFT
HOOD
EQUIPPED
APPLIANCE
OR
THE
CHIMNEY
IS
LINED
WITH
A
METAL
LINER
OR
T
YPE
B
METAL
VENT
.A
LL
INSTALLATIONS
USING
MASONRY
CHIMNEYS
MUST
BE
SIZED
IN
ACCORDANCE
WITH
THE
APPROPRIATE
VENTING
TABLES
.I
F
AN
80%
FURNACE
IS
COMMON
VENTED
WITH
A
DRAFT
HOOD
EQUIPPED
APPLIANCE
,
THE
POTENTIAL
FOR
CONDENSATION
DAMAGE
MAY
STILL
EXIST
WITH
EXTREMELY
COLD
CONDITIONS
,
LONG
VENT
CONNECTORS
,
EXTERIOR
CHIMNEYS
,
OR
ANY
COMBINATION
OF
THESE
CONDITIONS
.
T
HE
RISK
OF
CONDENSATION
DAMAGE
IS
BEST
AVOIDED
BY
USING
MASONRY
CHIMNEY
AS
A
PATHWAY
FOR
PROPERLY
SIZED
METAL
LINER
OR
T
YPE
B
METAL
VENT
.
WARNING
11
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XX
XX
XTERIORTERIOR
TERIORTERIOR
TERIOR
MASMAS
MASMAS
MASONRONR
ONRONR
ONRYY
YY
Y
CC
CC
C
HIMNEHIMNE
HIMNEHIMNE
HIMNEYY
YY
YSS
SS
S
- C- C
- C- C
- C
AA
AA
ATEGORTEGOR
TEGORTEGOR
TEGORYY
YY
Y
I FI F
I FI F
I F
URNAURNA
URNAURNA
URNACESCES
CESCES
CES
OO
OO
O
NLNL
NLNL
NL
YY
YY
Y
Wash
Clay Tile Size: 8" x 8" x12"
(Each x 24" Length)
1/2" to 1"Air Space
Second Floor
First Floor
Attic Floor
Roof Line
Throat
Damper
Breech
Clean Out Fan Assisted
Forced Air
Furnace
Natural Draft
Water Heater
Water Heater
Vent Connector
Basement Floor
F.A.F. Vent
Connector
Typical Multiple Flue Clay Tile Chimney
CC
CC
CHECKLISTHECKLIST
HECKLISTHECKLIST
HECKLIST SS
SS
SUMMARYUMMARY
UMMARYUMMARY
UMMARY
This checklist serves as a summary of the items to be checked
beforeventing an 80+ furnace into a masonry chimney. In addition,
we recommend that a qualified serviceman use this checklist to
perform a yearly inspection of the furnace venting system.
This checklist is only a summary. For detailed information on each of
the procedures mentioned, see the paragraph referenced with each
item.
This inspection is based upon a draft topical report,“Masonry Chim-
ney Inspection and Relining”, issued by the Gas Research Institute.
While not yet finalized, we believe this report represents the best
information on this subject which is currently available.
Proper Chimney
Termination?
(Check 1)
Chimney channel
free of solid and
liquid fuel
appliances?
(Check 2)
Change venting
arrangements
(Fix 2)
Crown in good
condition
(Check 3)
Rebuild crown
(Fix 3)
and/or Reline
(Fix 4)
Reline
(Fix 4)
Reline
(Fix 4)
Cleanout free of
debris?
(Check 4)
Liner in good
condition?
(Check 5)
Reline
(Fix 4)
Dilution air
available?
(Check 6)
Complete the
installation.
(Check 7)
CC
CC
CHECKHECK
HECKHECK
HECK 1 - P1 - P
1 - P1 - P
1 - PROPERROPER
ROPERROPER
ROPER CHIMNEYCHIMNEY
CHIMNEYCHIMNEY
CHIMNEY TERMINATIONTERMINATION
TERMINATIONTERMINATION
TERMINATION.....
A masonry chimney used as a vent for gas fired equipment must
extend at least three feet above the highest point where it passes
through the roof. It must extend at least two feet higher than any
portion of a building within a horizontal distance of 10 feet. In
addition, the chimney must terminate at least 3 feet above any
forced air inlet located within 10 feet.The chimney must extend at
least five feet above the highest connected equipment draft hood
outlet or flue collar.
12
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XX
XX
XTERIORTERIOR
TERIORTERIOR
TERIOR
MASMAS
MASMAS
MASONRONR
ONRONR
ONRYY
YY
Y
CC
CC
C
HIMNEHIMNE
HIMNEHIMNE
HIMNEYY
YY
YSS
SS
S
- C- C
- C- C
- C
AA
AA
ATEGORTEGOR
TEGORTEGOR
TEGORYY
YY
Y
I FI F
I FI F
I F
URNAURNA
URNAURNA
URNACESCES
CESCES
CES
OO
OO
O
NLNL
NLNL
NL
YY
YY
Y
Liquid fuel appliances include oil furnaces, oil-fired boilers and oil-
fired water heaters.
Appliances which burn propane (sometimes referred to as LP (liq-
uefied petroleum)) gas are considered gas-fired appliances.
CC
CC
CHECKHECK
HECKHECK
HECK 3 - C3 - C
3 - C3 - C
3 - CHIMNEYHIMNEY
HIMNEYHIMNEY
HIMNEY CC
CC
CROWNROWN
ROWNROWN
ROWN CC
CC
CONDITIONONDITION
ONDITIONONDITION
ONDITION.....
Damage from condensate usually shows up first in the crown. If any
of the following trouble signs are present, the condition of the
crown is not satisfactory:
a) Crown leaning
b) Bricks missing
c) Mortar missing
d) Tile liner cracked
e) No tile liner
f) Salt staining at mortar joints. (White stains, and mortar
becomes sandy and/or erodes.)
For problems a, b, or c, see Fix 3. If problems d, e, or f are present,
see Fix 4. IMPORTANT: It may be necessary to follow both Fix 3 and
Fix 4.
CC
CC
CHECKHECK
HECKHECK
HECK 4 - D4 - D
4 - D4 - D
4 - DEBRISEBRIS
EBRISEBRIS
EBRIS ININ
ININ
IN CC
CC
CLEANOUTLEANOUT
LEANOUTLEANOUT
LEANOUT
A cleanout (dropleg) must be present such that the upper edge of
the cleanout cover is at least 12 inches below the lower edge of the
lowest chimney inlet opening.
A chimney without a cleanout could become partially blocked by
debris. If no cleanout is present, the chimney must be relined (Fix
4). Remove the cleanout cover, and examine the cleanout for de-
bris. If significant amounts of any of the following are found:
• Fuel oil residue
• Bricks
• Mortar or sand
• Pieces of the tile liner
• Rusted pieces of the metallic liner - reline the chimney
(Fix 4).
CC
CC
CHECKHECK
HECKHECK
HECK 5 - L5 - L
5 - L5 - L
5 - LINERINER
INERINER
INER CC
CC
CONDITIONONDITION
ONDITIONONDITION
ONDITION.....
If a metal liner is present, it must be checked. It cannot be assumed
that all existing metal liners are correctly installed and in good con-
dition.
Remove the lowest existing vent connector, and examine the in-
side of the elbow or tee at the base of the liner. A small amount of
soot may be considered acceptable, provided the installer vacuums
it away. If rusted pieces of the liner have collected here, the metal
liner must be removed and replaced (Fix 4).
Next, gently tap the inside of the liner with a Phillips screwdriver. If
the screwdriver perforates the liner, or if the tapping does not sound
like metal hitting metal, the liner must be removed and replaced
(Fix 4).
Remember that all appliances must be vented inside the liner. Vent-
ing one appliance inside the liner and another appliance outside
the liner is not acceptable.
If the chimney does not meet these termination requirements, but
all other requirements in the checklist can be met, it may be pos-
sible for a mason to extend the chimney. If this will not be practical,
see Fix 1.
Wall or
Parapet
2' Min.
2' Min. 3' Min.
Chimney
10' or Less
10' or Less
2' Min. 3' Min.
Chimney
Termination 10 Feet Or Less From Ridge, Wall or Parapet
More than 10’
Wall or
Parapet
NOTE:
No Height
above parapet
required when distance
from walls or parapet is
more than 10 feet.
Chimney
3’Min.
More than 10’
10’
2” Min.
3’ Min.
Chimney
Height above any
roof surface within
10 feet horizontally.
Ridge
Termination More Than 10 Feet From Ridge, Wall or Parapet
CC
CC
CHECKHECK
HECKHECK
HECK 2 - A2 - A
2 - A2 - A
2 - ANYNY
NYNY
NY SOLIDSOLID
SOLIDSOLID
SOLID OROR
OROR
OR LIQUIDLIQUID
LIQUIDLIQUID
LIQUID FUELFUEL
FUELFUEL
FUEL APPLIANCESAPPLIANCES
APPLIANCESAPPLIANCES
APPLIANCES VENTEDVENTED
VENTEDVENTED
VENTED INTOINTO
INTOINTO
INTO
THISTHIS
THISTHIS
THIS CHIMNEYCHIMNEY
CHIMNEYCHIMNEY
CHIMNEY CHANNELCHANNEL
CHANNELCHANNEL
CHANNEL
Solid fuel appliances include fireplaces, wood stoves, coal furnaces,
and incinerators.
13
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XX
XX
XTERIORTERIOR
TERIORTERIOR
TERIOR
MASMAS
MASMAS
MASONRONR
ONRONR
ONRYY
YY
Y
CC
CC
C
HIMNEHIMNE
HIMNEHIMNE
HIMNEYY
YY
YSS
SS
S
- C- C
- C- C
- C
AA
AA
ATEGORTEGOR
TEGORTEGOR
TEGORYY
YY
Y
I FI F
I FI F
I F
URNAURNA
URNAURNA
URNACESCES
CESCES
CES
OO
OO
O
NLNL
NLNL
NL
YY
YY
Y
used as a vent for the gas appliances. However, the installer must
keep in mind the following factors which may render the tile liner
unsuitable for use as a vent:
• Extremely cold weather
• Long vent connectors
• Masonry chimneys with no air gap between the liner and
the bricks. (In practice, this can be difficult to detect.)
• Exterior chimneys (The tables in National Fuel Gas Code
NFPA 54/ANSI Z223.1 - latest edition and in the National
Standard of Canada, CAN/CSA B149.1 and CAN/CSA
B149.2 - latest editions and amendments assume interior
chimneys.)
If, in the judgment of the local gas utility, installer, and/or local
codes; one or more of the above factors is likely to present a prob-
lem, the chimney must be relined (Fix 4).
FF
FF
FIXIX
IXIX
IX 1 - L1 - L
1 - L1 - L
1 - LINERINER
INERINER
INER TT
TT
TERMINATIONERMINATION
ERMINATIONERMINATION
ERMINATION
Any cap or roof assembly used with a liner must be approved by the
liner manufacturer for such use. The liner and cap/roof assembly
must then terminate above the roof in accordance with the
manufacturer’s instructions.
In some cases, a shorter extension above the roof may be possible
with a liner than would be required with a masonry chimney.
For further information on relining, see Fix 4.
FF
FF
FIXIX
IXIX
IX 2 -C2 -C
2 -C2 -C
2 -CHANGEHANGE
HANGEHANGE
HANGE VV
VV
VENTINGENTING
ENTINGENTING
ENTING AA
AA
ARRANGEMENTSRRANGEMENTS
RRANGEMENTSRRANGEMENTS
RRANGEMENTS
If the masonry chimney has more than one channel, it may be
possible to vent the gas appliances into one channel and vent the
solid or liquid fuel appliance(s) into another channel(s). Do not vent
an 80+ Furnace inside of a metal liner with other appliances vented
outside the liner.
Alternatively, the homeowner may agree to discontinue use of the
fireplace (solid fuel appliance). If so, the tile liner must be cleaned
to remove creosote buildup. The fireplace opening must then be
permanently sealed.
If oil-fired appliance(s) are being replaced by gas-fired appliance(s),
the tile liner must first be cleaned to remove the fuel oil residue.
If none of the above options is practical, the furnace may need to be
vented vertically with a B Vent.
Under some conditions, a 90%+ furnace could be installed rather
than an 80% furnace.The 90%+ furnace can be vented horizontally
or vertically through PVC pipe.
FF
FF
FIXIX
IXIX
IX 3 - R3 - R
3 - R3 - R
3 - REBUILDEBUILD
EBUILDEBUILD
EBUILD THETHE
THETHE
THE CC
CC
CROWNROWN
ROWNROWN
ROWN
If the chimney crown is damaged, a qualified mason must repair it
in accordance with nationally recognized building codes or stan-
dards. One such standard which may be referenced is the Standard
for Chimneys, Fireplaces, Vents, and Solid Fuel Burning Appliances,
ANSI/NFPA 211.
Next, use a flashlight and small mirror to sight up the liner. B vent
must be supported so as to not come into direct contact with the
chimney walls or tile liner. If it is not, it can probably be rehung so as
to be acceptable. A thimble or fire stop may be helpful here.
Flexible liners should be hung straight or nearly straight. If it is spi-
raled in the chimney and in good condition, it should be rehung.To
do this, break the top seal; pull up and cut off the excess liner
length, and refit the top seal. Use caution when doing this, as the
cut edges of flexible liners may be sharp.
The surfaces of the liner must be physically sound. If gaps or holes
are present, the metal liner must be removed and replaced (Fix 4).
Finally, confirm that the metal liner is the correct size for the appli-
ances to be installed. Use the GAMA tables and rules.
If a metal liner is not present, a clay tile liner must be present, or the
chimney must be lined (Fix 4).
Use a flashlight and small mirror at the cleanout or vent connector
to inspect the clay tile liner. If any of the following problems are
present:
• Tile sections misaligned
• Tile sections missing
• Gaps between tile sections
• Signs of condensate drainage at the cleanout or vent
connectors
• Mortar protruding from between tile sections
• Use of sewer pipe or drainage pipe rather than an approved
fire clay tile reline the chimney (Fix 4).
Next, measure the size of the liner. It may be possible to do this
from the cleanout. The liner must be at least as large as the mini-
mum size established by the tables in National Fuel Gas Code NFPA
54/ANSI Z223.1 - latest edition and in the National Standard of
Canada, CAN/CSA B149.1 and CAN/CSA B149.2 - latest editions
and amendments. If the liner is too small or too large, then the
chimney must be relined (Fix 4).
CC
CC
CHECKHECK
HECKHECK
HECK 6 - D6 - D
6 - D6 - D
6 - DILUTIONILUTION
ILUTIONILUTION
ILUTION AA
AA
AIRIR
IRIR
IR.....
If gas-fired appliances are to be vented into a clay tile liner, a source
of dilution air is required.
Dilution air cannot be obtained through:
• Induced draft appliances
• Natural draft appliances with vent dampers
Sufficient dilution air can ordinarily be obtained through the draft
hood of a natural draft appliance only if the appliance’s vent con-
nector does not include a vent damper. If dilution air will not be
available, the chimney must be relined (Fix 4).
CC
CC
CHECKHECK
HECKHECK
HECK 7 - C7 - C
7 - C7 - C
7 - COMPLETEOMPLETE
OMPLETEOMPLETE
OMPLETE THETHE
THETHE
THE II
II
INSTALLATIONNSTALLATION
NSTALLATIONNSTALLATION
NSTALLATION.....
If Checks 1 through 6 have been satisfactory, and the liner is an
acceptable size as determined by the tables in National Fuel Gas
Code NFPA 54/ANSI Z223.1 - latest edition and in the National
Standard of Canada, CAN/CSA B149.1 and CAN/CSA B149.2 - latest
editions and amendments, then the clay tile liner can probably be
14
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LECTRICALLECTRICAL
LECTRICALLECTRICAL
LECTRICAL
CC
CC
C
ONNECTIONSONNECTIONS
ONNECTIONSONNECTIONS
ONNECTIONS
Some manufacturers of flexible liners offer an insulation sleeve
designed to be added to the liner before it is installed in the chim-
ney. (Poured insulation, either vermiculite or other materials, is no
longer recommended.) Insulation will need to be added to the
flexible liner if:
• It is required by the liner manufacturer’s instructions.
• The previous liner was properly sized and installed, and
suffered from condensation damage.
• It is required by your local building codes.
Even if none of those three conditions exist which require addi-
tional liner insulation, the installer may wish to consider it if:
• The local climate is very cold.
• The chimney is very tall.
• The vent connectors used are very long or have a large
number of elbows.
• Local experience indicates that flexible liners installed
without insulation are likely to have condensation
problems.
Insulation must be selected and installed in accordance with the
liner manufacturer’s instructions.
Finally, cap the chimney and terminate the liner in accordance with
the liner manufacturer’s instructions.
EE
EE
E
LECTRICALLECTRICAL
LECTRICALLECTRICAL
LECTRICAL
CC
CC
C
ONNECTIONSONNECTIONS
ONNECTIONSONNECTIONS
ONNECTIONS
HIGHVOLTAGE!
T
O
AVOID
THE
RISK
OF
ELECTRICAL
SHOCK
,
WIRING
TO
THE
UNIT
MUST
BE
POLARIZED
AND
GROUNDED
.
WARNING
HIGHVOLTAGE!
T
O
AVOID
PERSONAL
INJURY
OR
DEATH
DUE
TO
ELECTRICAL
SHOCK
,
DISCONNECT
ELECTRICAL
POWER
BEFORE
SERVICING
OR
CHANGING
ANY
ELECTRICAL
WIRING
.
WARNING
L
ABEL
ALL
WIRES
PRIOR
TO
DISCONNECTION
WHEN
SERVICING
CONTROLS
.W
IRING
ERRORS
CAN
CAUSE
IMPROPER
AND
DANGEROUS
OPERATION
.V
ERIFY
PROPER
OPERATION
AFTER
SERVICING
.
CAUTION
HIGHVOLTAGE!
T
O
AVOID
THE
RISK
OF
INJURY
,
ELECTRICAL
SHOCK
OR
DEATH
,
THE
FURNACE
MUST
BE
ELECTRICALLY
GROUNDED
IN
ACCORDANCE
WITH
LOCAL
CODES
OR
IN
THEIR
ABSENCE
,
WITH
THE
LATEST
EDITION
OF
THE
N
ATIONAL
E
LECTRIC
C
ODE
.
WARNING
FF
FF
FIXIX
IXIX
IX 4 - R4 - R
4 - R4 - R
4 - RELININGELINING
ELININGELINING
ELINING
Relining options include B vent and flexible liners.
If the chimney has diagonal offsets, B vent probably cannot be
used.
If B vent is to be used, it must be supported adequately. Supports
(such as fire stops or thimbles) must be used to prevent the B vent
from coming into direct contact with the tile liner or chimney walls.
Direct contact would result in higher heat loss, with an increased
possibility of poor venting system performance.
It is not acceptable to vent one appliance inside the B vent and
other appliances outside.The excess space between the B vent and
the chimney walls must be covered at the top of the chimney by a
weatherproof, corrosion resistant flashing.
The B vent should then be topped with a listed vent cap.The listed
vent cap will, when installed per the manufacturer’s instructions,
prevent problems due to rain, birds, or wind effects.
A B-vent installed as described in this section is considered to be an
enclosed vent system, and the sizing tables in National Fuel Gas
Code NFPA 54/ANSI Z223.1 - latest edition and in the National
Standard of Canada, CAN/CSA B149.1 and CAN/CSA B149.2 - latest
editions and amendments may be used.
If a flexible liner is to be used, it must be made of the proper mate-
rials:
• For most residential applications, an aluminum liner should
be acceptable.
• If the combustion air supplied to the furnace will be
contaminated with compounds containing chlorine or
fluorine, a liner of AL 29-4C stainless steel should be used.
Common sources of chlorine and fluorine compounds
include indoor swimming pools and chlorine bleaches,
paint strippers, adhesives, paints, varnishes, sealers, waxes
(which are not yet dried) and solvents used during
construction and remodeling. Various commercial and
industrial processes may also be sources of chlorine/
fluorine compounds.
• Heavier gauge 300 and 400 series stainless steel liners
were developed for use with oil or solid fuel appliances.
They are not suitable for use with gas-fired appliances.
Flexible liners specifically intended and tested for gas
applications are listed in the UL“Gas and Oil Equipment
Directory”. (UL Standard 1777).
For sizing of flexible liners, see Note 22 and the tables in the Na-
tional Fuel Gas Code NFPA 54/ANSI Z223.1 - latest edition and in
the National Standard of Canada, CAN/CSA B149.1 and CAN/CSA
B149.2 - latest editions and amendments.
To install the liner, read and follow the liner manufacturer’s instruc-
tions and your local codes. Excess liner length should be pulled out
of the chimney and cut off. Use caution when doing this, as the cut
edges of flexible liners may be sharp. Do not spiral excess liner
inside of the chimney. Support the liner as recommended by the
liner manufacturer.
15
EE
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LECTRICALLECTRICAL
LECTRICALLECTRICAL
LECTRICAL
CC
CC
C
ONNECTIONSONNECTIONS
ONNECTIONSONNECTIONS
ONNECTIONS
WW
WW
WIRINGIRING
IRINGIRING
IRING HH
HH
HARNESSARNESS
ARNESSARNESS
ARNESS
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 dia-
gram for wire routings. If any of the original wire as supplied with
the furnace must be replaced, it must be replaced with wiring ma-
terial having a temperature rating of at least 105° C. Any replace-
ment wiring must be a copper conductor.
115 V115 V
115 V115 V
115 VOLTOLT
OLTOLT
OLT LL
LL
LINEINE
INEINE
INE CC
CC
C
ONNECTIONSONNECTIONS
ONNECTIONSONNECTIONS
ONNECTIONS
Before proceeding with electrical connections, ensure that the sup-
ply voltage, frequency, and phase correspond to that specified on
the unit rating plate. Power supply to the furnace must be NEC
Class 1, and must comply with all applicable codes. The furnace
must be electrically grounded in accordance with local codes or, in
their absence, with the latest edition of The National Electric Code,
ANSI NFPA 70 and/or The Canadian Electric Code CSA C22.1.
Use a separate fused branch electrical circuit containing properly
sized wire, and fuse or circuit breaker. The fuse or circuit breaker
must be sized in accordance with the maximum overcurrent pro-
tection specified on the unit rating plate. An electrical disconnect
must be provided at the furnace location.
Line voltage wiring must enter into the junction box provided with
the furnace.
NOTE:NOTE:
NOTE:NOTE:
NOTE: Line polarity must be observed when making field
connections.
FF
FF
FOSSILOSSIL
OSSILOSSIL
OSSIL FF
FF
FUELUEL
UELUEL
UEL AA
AA
APPLICATIONSPPLICATIONS
PPLICATIONSPPLICATIONS
PPLICATIONS
This furnace can be used in conjunction with a heat pump in a fossil
fuel application. A fossil fuel application refers to a combined gas
furnace and heat pump installation which uses an outdoor tem-
perature sensor to determine the most cost efficient means of heat-
ing (heat pump, gas furnace, or both).
A heat pump thermostat with two stages of heat is required to prop-
erly use a furnace in conjunction with a heat pump. Refer to the
fossil fuel kit installation instructions for additional thermostat re-
quirements.
Strictly follow the wiring guidelines in the fossil fuel kit installation
instructions. All furnace connections must be made to the furnace
integrated control module and the FURNACE terminal strip on the
fossil fuel control board.
JJ
JJ
JUNCTIONUNCTION
UNCTIONUNCTION
UNCTION BB
BB
BOXOX
OXOX
OX RR
RR
RELOCATIONELOCATION
ELOCATIONELOCATION
ELOCATION
E
DGES
OF
SHEET
METAL
HOLES
MAY
BE
SHARP
.U
SE
GLOVES
AS
A
PRECAUTION
WHEN
REMOVING
HOLE
PLUGS
.
WARNING
Line voltage connections can be made through either the right or
left side panel. The furnace is shipped configured for a right side
electrical connection. To make electrical connections through the
opposite side of the furnace, the junction box must be relocated to
the left side prior to making electrical connections. To relocate the
junction box, perform the following steps.
T
O
PREVENT
PERSONAL
INJURY
OR
DEATH
DUE
TO
ELECTRIC
SHOCK
,
DISCONNECT
ELECTRICAL
POWER
BEFORE
INSTALLING
OR
SERVICING
THIS
UNIT
.
WARNING
1. Remove both doors from the furnace.
2. Remove and save the screws holding the junction box to
the left side of the furnace.
3. Models that have the junction box located in the burner
compartment will need to move the junction box directly
over.
4. Attach the junction box to the right side of the furnace,
using the screws removed in step 2.
5. Check the location of the wiring. Confirm that it will not be
damaged by heat from the burners or by the rotation of the
fan. Also confirm that wiring location will not interfere with
filter removal or other maintenance.
After the junction box is in the desired location, use washers to
connect field-supplied conduit to the junction box in accordance
with NEC and local codes. Connect hot, neutral, and ground wires
as shown in the furnace wiring diagram. The wires and ground
screw are located in the furnace junction box.
NOTE:NOTE:
NOTE:NOTE:
NOTE: In downflow applications the power leads should be routed
through the supplied wire tabs when rotating junction box to the
left side.
Low voltage wires may be connected to the terminal strip.
IMPORIMPOR
IMPORIMPOR
IMPORTT
TT
TANT NOANT NO
ANT NOANT NO
ANT NOTE:TE:
TE:TE:
TE: To avoid possible equipment malfunction, route
the low voltage wires to avoid interference with filter removal or
other maintenance.
HIGHVOLTAGE!
T
O
AVOID
THE
RISK
OF
INJURY
,
ELECTRICAL
SHOCK
OR
DEATH
,
THE
FURNACE
MUST
BE
ELECTRICALLY
GROUNDED
IN
ACCORDANCE
WITH
LOCAL
CODES
OR
IN
THEIR
ABSENCE
,
WITH
THE
LATEST
EDITION
OF
THE
N
ATIONAL
E
LECTRIC
C
ODE
.
WARNING
To ensure proper unit grounding, the ground wire should run from
the furnace ground screw located inside the furnace junction box
all the way back to the electrical panel. NOTE:NOTE:
NOTE:NOTE:
NOTE: Do not use gas
piping as an electrical ground. To confirm proper unit grounding,
turn off the electrical power and perform the following check.
1. Measure resistance between the neutral (white) connection
and one of the burners.
2. Resistance should measure 10 ohms or less.
16
GG
GG
G
ASAS
ASAS
AS
SS
SS
S
UPPLUPPL
UPPLUPPL
UPPL
YY
YY
Y
ANDAND
ANDAND
AND
PP
PP
P
IPINGIPING
IPINGIPING
IPING
This furnace is equipped with a blower door interlock switch which
interrupts unit voltage when the blower door is opened for servic-
ing. Do not defeat this switch.
24 V24 V
24 V24 V
24 VOLTOLT
OLTOLT
OLT TT
TT
THERMOSTATHERMOSTAT
HERMOSTATHERMOSTAT
HERMOSTAT WW
WW
WIRINGIRING
IRINGIRING
IRING
NOTE:NOTE:
NOTE:NOTE:
NOTE: Wire routing must not interfere with circulator blower
operation, filter removal, or routine maintenance.
Low voltage connections can be made through either the right or
left side panel.Thermostat wiring entrance holes are located in the
blower compartment. The following figure shows connections for
a“heat only”system and“heat/cool system”.
Furnace
Control Furnace
Control
Remote
Condensing
Unit
Heatin
g
Room Thermostat Heating/Cooling
Room Thermostat
W
W
Typical Field Wiring (24 VAC Control Circuit)
This furnace is equipped with a 40 VA transformer to facilitate use
with most cooling equipment. Consult the wiring diagram, located
on the blower compartment door, for further details of 115Volt and
24 Volt wiring.
A single-stage thermostat with only one heating stage can be used
to control this furnace.
SS
SS
SETTINGETTING
ETTINGETTING
ETTING THETHE
THETHE
THE HH
HH
HEATEAT
EATEAT
EAT AA
AA
ANTICIPATORNTICIPATOR
NTICIPATORNTICIPATOR
NTICIPATOR
The following method should be used in measuring the amp draw
of the control circuit to assure proper adjustment of the thermostat
heat anticipator
• Wrap the“R”leg around a clip-on ammeter 10 times.
• Energize the furnace in the heat mode.
• Record the reading.
• Divide this reading by 10.
• Set the heat anticipator on the thermostat to match this
reading.
Example: If the reading on the ammeter is“4”, divide this by 10.The
anticipator setting will be .4 amps.
115 V115 V
115 V115 V
115 VOLTOLT
OLTOLT
OLT LL
LL
LINEINE
INEINE
INE CC
CC
CONNECTIONONNECTION
ONNECTIONONNECTION
ONNECTION OFOF
OFOF
OF AA
AA
ACCESSORIESCCESSORIES
CCESSORIESCCESSORIES
CCESSORIES
(E(E
(E(E
(ELECTRONICLECTRONIC
LECTRONICLECTRONIC
LECTRONIC AA
AA
AIRIR
IRIR
IR CC
CC
CLEANERLEANER
LEANERLEANER
LEANER))
))
)
HIGHVOLTAGE!
T
O
AVOID
PERSONAL
INJURY
OR
DEATH
DUE
TO
ELECTRICAL
SHOCK
,
DISCONNECT
ELECTRICAL
POWER
BEFORE
SERVICING
OR
CHANGING
ANY
ELECTRICAL
WIRING
.
WARNING
The furnace integrated control module is equipped with line volt-
age accessory terminals for controlling power to an optional field-
supplied electronic air cleaner.
The accessory load specifications are as follows:
Electronic Air Cleaner 1.0 Amp maximum at 120 VAC
Turn OFF power to the furnace before installing any accessories.
Follow the air cleaner manufacturers’ instructions for locating, mount-
ing, grounding, and controlling these accessories. Accessory wir-
ing connections are to be made through the 1/4" quick connect
terminals provided on the furnace integrated control module. The
electronic air cleaner hot terminal is identified as EAC-H and the
neutral terminal is identified as NEUTRAL. All field wiring must
conform to applicable codes. Connections should be made as shown
in the following illustration.
EAC-H
Line
Transformer
Line
Transformer
EAC
Air Cleaner
Control Module
Hot 120 VAC Neutral 120 VAC
Optional
Accessories
If it is necessary for the installer to supply additional line voltage
wiring to the inside of the furnace, the wiring must conform to all
local codes, and have a minimum temperature rating of 105°C. All
line voltage wire splices must be made inside the furnace junction
box.
The integrated control module electronic air cleaner terminals (EAC)
are energized with 115 volts whenever the circulator blower is
energized.
24 V24 V
24 V24 V
24 VACAC
ACAC
AC HH
HH
HUMIDIFIERUMIDIFIER
UMIDIFIERUMIDIFIER
UMIDIFIER
The yellow wire connected to the I.D. Blower pressure switch is
powered anytime the pressure switch is closed and provides 24
VAC humidifier control. Remove the yellow wire and connect
the supplied brown jumper wire to the pressure switch terminal.
Reconnect the yellow wire to the “piggyback” terminal on the
brown jumper and then connect the 24VAC line of the humidifier
to the stripped end of the brown wire. Using a wire nut or a field-
supplied quick connect terminal can make this connection. The
17
GG
GG
G
ASAS
ASAS
AS
SS
SS
S
UPPLUPPL
UPPLUPPL
UPPL
YY
YY
Y
ANDAND
ANDAND
AND
PP
PP
P
IPINGIPING
IPINGIPING
IPING
wiring must conform to all local and national codes. Connect the
COM side of the humidifier to the B/C terminal on the furnace
control board (or to the COM side of the 24 VAC transformer). DODO
DODO
DO
NONO
NONO
NOT CT C
T CT C
T CONNECONNEC
ONNECONNEC
ONNECT 115V HUMIDIFIERT 115V HUMIDIFIER
T 115V HUMIDIFIERT 115V HUMIDIFIER
T 115V HUMIDIFIER TT
TT
TOO
OO
O
THESETHESE
THESETHESE
THESE TERMINALS.TERMINALS.
TERMINALS.TERMINALS.
TERMINALS.
GG
GG
G
ASAS
ASAS
AS
SS
SS
S
UPPLUPPL
UPPLUPPL
UPPL
YY
YY
Y
ANDAND
ANDAND
AND
PP
PP
P
IPINGIPING
IPINGIPING
IPING
The furnace rating plate includes the approved furnace gas input
rating and gas types. The furnace must be equipped to operate on
the type of gas applied. This includes any conversion kits required
for alternate fuels and/or high altitude.
CAUTION
T
O
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 in the following table. The supply pressure must be con-
stant and available with all other household gas fired appliances
operating. The minimum gas supply pressure must be maintained
to prevent unreliable ignition. The maximum must not be exceeded
to prevent unit overfiring.
Natural Gas Minimum: 5.0" w.c. Maximum:10.0" w.c.
Propane Gas Minimum: 11.0" w.c. Maximum:13.0" w.c.
Inlet Gas Supply Pressure
NOTE:NOTE:
NOTE:NOTE:
NOTE: Adjusting the minimum supply pressure below the limits in
the above table could lead to unreliable ignition. Gas input to the
burners must not exceed the rated input shown on the rating plate.
Overfiring of the furnace can result in premature heat exchanger
failure. Gas pressures in excess of 13 inches water column can also
cause permanent damage to the gas valve.
At all altitudes, the manifold pressure must be within 0.3 inches
w.c. of that listed in the Specification Sheet applicable to your model
for the fuel used. At all altitudes and with either fuel, the air tempera-
ture rise must be within the range listed on the furnace nameplate.
Should this appliance be converted to LP, refer to the instructions
included in the factory authorized LP conversion kit.
HH
HH
HIGHIGH
IGHIGH
IGH AA
AA
ALTITUDELTITUDE
LTITUDELTITUDE
LTITUDE DD
DD
DERATEERATE
ERATEERATE
ERATE
IMPORIMPOR
IMPORIMPOR
IMPORTT
TT
TANT NOANT NO
ANT NOANT NO
ANT NOTE:TE:
TE:TE:
TE: The furnace will naturally derate itself with
altitude. Do not attempt to increase the firing rate by changing
orifices or increasing the manifold pressure. This can cause poor
combustion and equipment failure.
High altitude installations may require both a pressure switch and
an orifice change. These changes are necessary to compensate for
the natural reduction in the density of both the gas fuel and the
combustion air at higher altitude.
For installations above 7000 feet, please refer to your distributor for
required kit(s).
High Stage Low Stage
Natural None #43 3.5" w.c. 1.9" w.c. None
Propane LPM-03B #55 10.0" w.c. 6.0" w.c. None
Orifice
NOTE
:
I
n
C
ana
d
a, gas
f
urnaces are on
l
y cer
tifi
e
d
t
o
4500
f
ee
t
.
0-7000
Manifold Pressure Pressure
Switch Change
Gas Altitude Kit
Contact the distributor for a tabular listing of appropriate
manufacturer’s kits for propane gas and/or high altitude installa-
tions. The indicated kits must be used to insure safe and proper
furnace operation. All conversions must be performed by a quali-
fied installer, or service agency.
PP
PP
PROPANEROPANE
ROPANEROPANE
ROPANE GG
GG
GASAS
ASAS
AS CC
CC
CONVERSIONONVERSION
ONVERSIONONVERSION
ONVERSION
WARNING
P
OSSIBLE
PROPERTY
DAMAGE
,
PERSONAL
INJURY
OR
DEATH
MAY
OCCUR
IF
THE
CORRECT
CONVERSION
KITS
ARE
NOT
INSTALLED
.T
HE
APPROPRIATE
KITS
MUST
BE
APPLIED
TO
ENSURE
SAFE
AND
PROPER
FURNACE
OPERATION
.A
LL
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 instal-
lations. Refer to the“Propane Gas and/or High Altitude Installations”
section for details.
Contact your distributor for a tabular listing of appropriate
manufacturer’s kits for propane gas and/or high altitude installa-
tions. The indicated kits must be used to insure safe and proper
furnace operation. All conversions must be performed by a quali-
fied installer, or service agency.
GG
GG
GASAS
ASAS
AS PP
PP
P
IPINGIPING
IPINGIPING
IPING CC
CC
CONNECTIONSONNECTIONS
ONNECTIONSONNECTIONS
ONNECTIONS
T
O
AVOID
POSSIBLE
UNSATISFACTORY
OPERATION
OF
EQUIPMENT
DAMAGE
DUE
TO
UNDERFIRING
OR
EQUIPMENT
,
USE
THE
PROPER
SIZE
OF
NATURAL
/
PROPANE
GAS
PIPING
NEEDED
WHEN
RUNNING
PIPE
FROM
THE
METER
/
TANK
TO
THE
FURNACE
.
WARNING
When sizing a trunk line, be sure to include all appliances which will
operate simultaneously.
The gas piping supplying the furnace must be properly sized based
on the gas flow required, specific gravity of the gas, and length of
the run. The gas line installation must comply with local codes, or in
their absence, with the latest edition of the National Fuel Gas Code,
NFPA 54/ANSI Z223.1.
18
GG
GG
G
ASAS
ASAS
AS
SS
SS
S
UPPLUPPL
UPPLUPPL
UPPL
YY
YY
Y
ANDAND
ANDAND
AND
PP
PP
P
IPINGIPING
IPINGIPING
IPING
Natural Gas Capacity of Pipe
In Cubic Feet of Gas Per Hour (CFH)
Length of NominalBlack Pipe Size
Pipe in Feet 1/2" 3/4" 1" 1 1/4" 1 1/2"
10 132 278 520 1050 1600
20 92 190 350 730 1100
30 73 152 285 590 980
40 63 130 245 500 760
50 56 115 215 440 670
60 50 105 195 400 610
70 46 96 180 370 560
80 43 90 170 350 530
90 40 84 160 320 490
100 38 79 150 305 460
(Pressure 0.5 psig or less and pressure drop of 0.3" W.C.; Based on
0.60 Specific Gravity Gas)
CFH = BTUHFurnace 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.
• Use black iron or steel pipe and fittings for the building
piping.
• Use pipe joint compound on male threads only. Pipe joint
compound must be resistant to the action of the fuel used.
• Use ground joint unions.
• Install a drip leg to trap dirt and moisture before it can
enter the gas valve. The drip leg must be a minimum of
three inches long.
• Install a 1/8" NPT pipe plug fitting, accessible for test gage
connection, immediately upstream of the gas supply
connection to the furnace.
• 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.
• Install a manual shutoff valve between the gas meter and
unit within six feet of the unit. If a union is installed, the
union must be downstream of the manual shutoff valve,
between the shutoff valve and the furnace.
• Tighten all joints securely.
• Connect the furnace to the building piping by one of the
following methods:
–Rigid metallic pipe and fittings.
–Semi-rigid metallic tubing and metallic fittings.
Aluminum alloy tubing must not be used in exterior
locations.
–Use listed gas appliance connectors in accordance with
their instructions. Connectors must be fully in the same
room as the furnace.
–Protect connectors and semi-rigid tubing against
physical and thermal damage when installed. Ensure
aluminum-alloy tubing and connectors are coated to
protect against external corrosion when in contact with
masonry, plaster, or insulation, or subjected to repeated
wetting by liquids such as water (except rain water),
detergents, or sewage.
Drip Leg
Ground Joint Pipe Union
To Be InstalledAhead of
Gas Valve
Reducing Coupling
1/2” x 1/8” with 1/8”
Pipe Plug to Measure
Line Gas Pressure
Height Required
By Local Code
Location of Manual Valve
(Installed Ahead of
Ground Joint Pipe Union)
``
General Furnace Layout
UU
UU
UPFLOWPFLOW
PFLOWPFLOW
PFLOW II
II
INSTALLATIONSNSTALLATIONS
NSTALLATIONSNSTALLATIONS
NSTALLATIONS
When the gas piping enters through the right side of the furnace, the
installer must supply the following fittings (starting from the gas
valve):
• 90 degree elbows (2).
• Close nipple.
• Straight pipe to reach the exterior of the furnace .
A ground joint union, drip leg, and manual shutoff valve must also
be supplied by the installer. In some cases, the installer may also
need to supply a transition piece from 1/2" to another pipe size.
When the gas piping enters through the left side of the furnace, the
installer must supply the following fittings (starting from the gas
valve):
• Straight pipe to reach the exterior of the furnace.
• A ground joint union, drip leg, and manual shutoff valve
must also be supplied by the installer. In some cases, the
installer may also need to supply a transition piece from 1/
2 inch to another pipe size.
CC
CC
COUNTERFLOWOUNTERFLOW
OUNTERFLOWOUNTERFLOW
OUNTERFLOW II
II
INSTALLATIONSNSTALLATIONS
NSTALLATIONSNSTALLATIONS
NSTALLATIONS
When the gas piping enters through the left side of the furnace, the
installer must supply a straight pipe to reach the exterior of the
furnace.
A ground joint union, drip leg and manual shutoff valve must also
be supplied by the installer. In most cases, the installer may also
need to supply a transition piece from ½” to another pipe size.
When the gas piping enters through the right side of the furnace,
19
CC
CC
C
IRIR
IRIR
IRCULCUL
CULCUL
CULAA
AA
ATINGTING
TINGTING
TING
AA
AA
A
IRIR
IRIR
IR
ANDAND
ANDAND
AND
FF
FF
F
ILIL
ILIL
IL
TERSTERS
TERSTERS
TERS
the installer must supply the following fittings (starting at the gas
valve):
• 90 Degree Elbow
• Close Nipple
• 90 Degree Elbow
• Straight Pipe to Reach Exterior of Furnace.
GG
GG
GASAS
ASAS
AS PP
PP
PIPINGIPING
IPINGIPING
IPING CC
CC
CHECKSHECKS
HECKSHECKS
HECKS
Before placing unit in operation, leak test the unit and gas connec-
tions.
T
O
AVOID
THE
POSSIBILITY
OF
EXPLOSION
OR
FIRE
,
NEVER
USE
A
MATCH
OR
OPEN
FLAME
TO
TEST
FOR
LEAKS
.
WARNING
Check for leaks using an approved chloride-free soap and water
solution, an electronic combustible gas detector, or other approved
testing methods.
NOTE:NOTE:
NOTE:NOTE:
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 pres-
sures in excess of 1/2 psig (3.48 kPa).
This unit must be isolated from the gas supply system by closing its
manual shutoff valve before pressure testing of gas supply piping
system with test pressures equal to or less than 1/2 psig (3.48 kPa).
PP
PP
PROPANEROPANE
ROPANEROPANE
ROPANE GG
GG
GASAS
ASAS
AS TT
TT
TANKSANKS
ANKSANKS
ANKS ANDAND
ANDAND
AND PP
PP
PIPINGIPING
IPINGIPING
IPING
I
F
THE
GAS
FURNACE
IS
INSTALLED
IN
A
BASEMENT
,
AN
EXCAVATED
AREA
OR
CONFINED
SPACE
,
IT
IS
STRONGLY
RECOMMENDED
TO
CONTACT
A
PROPANE
SUPPLIER
TO
INSTALL
A
GAS
DETECTING
WARNING
DEVICE
IN
CASE
OF
A
GAS
LEAK
.
S
INCE
PROPANE
GAS
IS
HEAVIER
THAN
AIR
,
ANY
LEAKING
GAS
CAN
SETTLE
IN
ANY
LOW
AREAS
OR
CONFINED
SPACES
.
P
ROPANE
GAS
ODORANT
MAY
FADE
,
MAKING
THE
GAS
UNDETECTABLE
EXCEPT
WITH
A
WARNING
DEVICE
.
•
•
WARNING
A gas detecting warning system is the only reliable way to detect a
propane gas leak. Rust can reduce the level of odorant in propane
gas. Do not rely on your sense of smell. Contact a local propane gas
supplier about installing a gas detecting warning system. If the
presence of gas is suspected, follow the instructions on Page 3 of
this manual.
All propane gas equipment must conform to the safety standards of
the National Board of Fire Underwriters, NBFU Manual 58.
For satisfactory operation, propane gas pressure must be 10 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 liquid,
and“wetted surface”area of the container or containers.
2. Proper pressure regulation. (Two-stage regulation is
recommended for both cost and efficiency).
3. Pressure drop in lines between regulators, and between
second stage regulator and the appliance. Pipe size will
depend on length of pipe run and total load of all appliances.
Complete information regarding tank sizing for vaporization, rec-
ommended regulator settings, and pipe sizing is available from
most regulator manufacturers and propane gas suppliers.
Since propane gas will quickly dissolve white lead and most stan-
dard commercial compounds, special pipe dope must be used.
Shellac-based compounds resistant to the actions of liquefied pe-
troleum gases such as Gasolac®, Stalactic®, Clyde’s®or John Crane®
are satisfactory.
Refer to the following illustration for typical propane gas installa-
tions and piping.
200 PSIG
Maximum
5 to 15 PSIG
(20 PSIG Max.) Continuous
11" W.C.
Second Stage
Regulator
First Stage
Regulator
Propane Gas Installation (Typ.)
PP
PP
PROPANEROPANE
ROPANEROPANE
ROPANE GG
GG
GASAS
ASAS
AS PP
PP
PIPINGIPING
IPINGIPING
IPING CC
CC
CHARTSHARTS
HARTSHARTS
HARTS
3/8" 1/2" 5/8" 3/4" 7/8" 1/2" 3/4"
10 730 1,700 3,200 5,300 8,300 3,200 7,500
20 500 1,100 2,200 3,700 5,800 2,200 4,200
30 400 920 2,000 2,900 4,700 1,800 4,000
40 370 850 1,700 2,700 4,100 1,600 3,700
50 330 770 1,500 2,400 3,700 1,500 3,400
60 300 700 1,300 2,200 3,300 1,300 310
80 260 610 1,200 1,900 2,900 1,200 2,600
100 220 540 1,000 1,700 2,600 1,000 2,300
125 200 490 900 1,400 2,300 900 2,100
150 190 430 830 1,300 2,100 830 1,900
175 170 400 780 1,200 1,900 770 1,700
200 160 380 730 1,100 1,800 720 1,500
Sizing Between First and Second Stage Regulator*
Maximum Propane Capacities listed are based on 2 psig pressure drop at 10 psig setting.
Capacities in 1,000 BTU/hour.
Nominal Pipe Size
Schedule 40
Tubing Size, O.D. Type L
Pipe or
Tubing
Length,
Feet
20
CC
CC
C
IRIR
IRIR
IRCULCUL
CULCUL
CULAA
AA
ATINGTING
TINGTING
TING
AA
AA
A
IRIR
IRIR
IR
ANDAND
ANDAND
AND
FF
FF
F
ILIL
ILIL
IL
TERSTERS
TERSTERS
TERS
3/8" 1/2" 5/8" 3/4" 7/8" 1-1/8" 1/2" 3/4" 1" 1-1/4" 1-1/2"
10 39 92 199 329 501 935 275 567 1,071 2,205 3,307
20 26 62 131 216 346 630 189 393 732 1,496 2,299
30 21 50 107 181 277 500 152 315 590 1,212 1,858
40 19 41 90 145 233 427 129 267 504 1,039 1,559
50 18 37 79 131 198 376 114 237 448 91 1,417
60 16 35 72 121 187 340 103 217 409 834 1,275
80 13 29 62 104 155 289 89 185 346 724 1,066
100 11 26 55 90 138 255 78 162 307 630 976
125 10 24 48 81 122 224 69 146 275 567 866
150 9 21 43 72 109 202 63 132 252 511 787
200 8 19 39 66 100 187 54 112 209 439 665
250 8 17 36 60 93 172 48 100 185 390 590
Pipe or
Tubing
Length,
Feet
Nominal Pipe Size
Schedule 40
Tubing Size, O.D. Type L
Sizing Between Second Stage and Appliance Regulator*
Maximum Propane Capacities listed are based on 2 psig pressure drop at 10 psig setting.
Capacities in 1,000 BTU/hour.
CC
CC
C
IRIR
IRIR
IRCULCUL
CULCUL
CULAA
AA
ATINGTING
TINGTING
TING
AA
AA
A
IRIR
IRIR
IR
ANDAND
ANDAND
AND
FF
FF
F
ILIL
ILIL
IL
TERSTERS
TERSTERS
TERS
N
EVER
ALLOW
THE
PRODUCTS
OF
COMBUSTION
,
INCLUDING
CARBON
MONOXIDE
,
TO
ENTER
THE
RETURN
DUCT
WORK
OR
CIRCULATION
AIR
SUPPLY
.
WARNING
Duct systems and register sizes must be properly designed for the
CFM and external static pressure rating of the furnace. Ductwork
should be designed in accordance with the recommended meth-
ods of“Air Conditioning Contractors of America”Manual D.
A duct system must 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 closed return duct system must be used, with the return duct
connected to the furnace. NOTE:NOTE:
NOTE:NOTE:
NOTE:
Ductwork must never be at-
tached to the back of the furnace. For installations requiring more
than 1800 CFM, use a bottom return or two sided return. Supply and
return connections to the furnace may be made with flexible joints
to reduce noise transmission. To prevent the blower from inter-
fering with combustion air or draft when a central return is used, a
connecting duct must be installed between the unit and the utility
room wall. A 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 the heating element.
With a parallel flow arrangement, the dampers or other means used
to control the flow of air must be adequate to prevent chilled air
from entering the furnace and, if manually operated, must be
equipped with means to prevent operation of either unit unless the
damper is in the full heat or cool position.
When the furnace is installed without a cooling coil, it is recom-
mended that a removable access panel be provided in the outlet air
duct.This opening shall be accessible when the furnace is installed
and shall be of such a size that the heat exchanger can be viewed
for visual light inspection or such that a sampling probe can be
inserted into the airstream.The access panel must be made to pre-
vent air leaks when the furnace is in operation.
When the furnace is heating, the temperature of the return air
entering the furnace must be between 55°F and 100°F.
When a furnace is installed so that supply ducts carry air circulated
by the furnace to areas outside the space containing the furnace,
the return air shall also be handled by a duct sealed to the furnace
casing and terminating outside the space containing the furnace.
FF
FF
FILTERSILTERS
ILTERSILTERS
ILTERS - R- R
- R- R
- READEAD
EADEAD
EAD TT
TT
THISHIS
HISHIS
HIS SS
SS
SECTIONECTION
ECTIONECTION
ECTION BB
BB
BEFOREEFORE
EFOREEFORE
EFORE II
II
INSTALLINGNSTALLING
NSTALLINGNSTALLING
NSTALLING TT
TT
THEHE
HEHE
HE RR
RR
RETURNETURN
ETURNETURN
ETURN
AA
AA
AIRIR
IRIR
IR DD
DD
DUCTWORKUCTWORK
UCTWORKUCTWORK
UCTWORK
Filters must be used with this furnace. Discuss filter maintenance
with the building owner. Filters do not ship with this furnace, but
must be provided by the installer. Filters must comply with UL900
or CAN/ULCS111 standards. If the furnace is installed without filters,
the warranty will be voided.
NONO
NONO
NOTE:TE:
TE:TE:
TE: An undersized opening will cause reduced airflow. The
bottom return is set up as a knock out.
UU
UU
UPRIGHTPRIGHT
PRIGHTPRIGHT
PRIGHT II
II
INSTALLATIONSNSTALLATIONS
NSTALLATIONSNSTALLATIONS
NSTALLATIONS
Depending on the installation and/or customer preference, differ-
ing filter arrangements can be applied. Filters can be installed in
the central return register or a side panel external filter rack kit
(upflows), or the ductwork above a downflow furnace. As an alter-
native, a media air filter or electronic air cleaner can be used as the
primary filter.
CC
CC
CIRCULATIONIRCULATION
IRCULATIONIRCULATION
IRCULATION AA
AA
AIRIR
IRIR
IR FF
FF
FILTERSILTERS
ILTERSILTERS
ILTERS
One of the most common causes of a problem in a forced air heat-
ing system is a blocked or dirty filter. Circulating air filters must be
inspected monthly for dirt accumulation and replaced if necessary.
Failure to maintain clean filters can cause premature heat exchanger
failure.
A new home may require more frequent replacement until all con-
struction dust and dirt is removed. Circulating air filters are to be
installed in the return air duct external to the furnace cabinet.
FURNACE INPUT FILTER SIZE
45M 320in2
70M 483in2
90M 640in2
115M 800in2
140M 738in2
DISPOSABLE NOMINAL 300 F.M. FACE VELOCITY
MINIMUM FILTER SIZES for DISPOSABLE FILTERS
HH
HH
HORIZONTALORIZONTAL
ORIZONTALORIZONTAL
ORIZONTAL II
II
INSTALLATIONSNSTALLATIONS
NSTALLATIONSNSTALLATIONS
NSTALLATIONS
Filters must be installed in either the central return register or in the
return air duct work.
SS
SS
S
EQUENCEEQUENCE
EQUENCEEQUENCE
EQUENCE
OFOF
OFOF
OF
OO
OO
O
PERPER
PERPER
PERAA
AA
ATIONTION
TIONTION
TION
(I(I
(I(I
(I
NTEGRNTEGR
NTEGRNTEGR
NTEGRAA
AA
ATEDTED
TEDTED
TED
II
II
I
GNITIONGNITION
GNITIONGNITION
GNITION
CC
CC
C
ONTRONTR
ONTRONTR
ONTROLOL
OLOL
OL
))
))
)
Refer toTiming Charts for sequencing.
NOTE:NOTE:
NOTE:NOTE:
NOTE: Dip switch positions referenced in this section applies to
*(M,D)H8 models only.
PP
PP
POWEROWER
OWEROWER
OWER UU
UU
UPP
PP
P
•115 VAC power applied to furnace.
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