Carrier 58ST Guide

1
58ST
Single ---Stage Deluxe
I n d u c e d --- C o m b u st i o n
4---Way Multipoise Furnace
Installation, Start---up, Operating and
Service and Maintenance
Instructions Series 120/C
SAFETY CONSIDERATIONS 2........................
INTRODUCTION 3..................................
CODES AND STANDARDS 4..........................
Safety 4.........................................
General Installation 5...............................
Combustion and Ventilation Air 5.....................
Duct Systems 5...................................
Acoustical Lining and Fibrous Glass Duct 5.............
Gas Piping and Gas Pipe Pressure Testing 5.............
Electrical Connections 5............................
Venting 5........................................
LOCATION 6.......................................
AIR FOR COMBUSTION AND VENTILATION 8.........
INSTALLATION 11..................................
Bottom Return Air Inlet 11..........................
Side Return Air Inlet 11.............................
Leveling Legs (If Desired) 11........................
Bottom Return Air Inlet 12..........................
Suspended Furnace Support 12.......................
Platform Furnace Support 13.........................
Roll--Out Protection 13.............................
Bottom Return Air Inlet 13..........................
Side Return Air Inlet 13.............................
General Requirements 14............................
Ductwork Acoustical Treatment 14....................
Supply Air Connections 14..........................
Return Air Connections 20..........................
START--UP, ADJUSTMENT, AND SAFETY CHECK 32.....
General 32.......................................
Start--Up Procedures 32.............................
Adjustments 35...................................
Check Safety Controls 39...........................
Checklist 39......................................
SERVICE AND MAINTENANCE PROCEDURES 46.......
Introduction 47...................................
Care and Maintenance 47...........................
Sequence of Operation 50...........................
Wiring Diagrams 51...............................
Troubleshooting 51................................
ama
REGISTERED
ISO 9001:2000
CERTIFIED
NOTE: Read the entire instruction manual before starting the
installation.
Portions of the text and tables are reprinted from NFPA 54/ANSI
Z223.1--2006E, with permission of Nation Fire Protection
Association, Quincy, MA 02269 and American Gas Association,
Washington DC 20001. This reprinted material is not the
complete and official position of the NFPA or ANSI on the
referenced subject, which is represented only by the standard in
its entirely.

2
SAFETY CONSIDERATIONS
Improper installation, adjustment, alteration, service,
maintenance, or use can cause explosion, fire, electrical shock, or
other conditions which may cause death, personal injury, or
property damage. Consult a qualified installer, service agency, or
your distributor or branch for information or assistance. The
qualified installer or agency must use factory--authorized kits or
accessories when modifying this product. Refer to the individual
instructions packaged with the kits or accessories when installing.
Follow all safety codes. Wear safety glasses, protective clothing,
and work gloves. Use quenching cloth for brazing operations.
Have fire extinguisher available. Read these instructions
thoroughly and follow all warnings or cautions included in
literature and attached to the unit. Consult local building codes
and National Electrical Code (NEC) for special requirements.
Recognize safety information. This is the safety--alert symbol !
!.
When you see this symbol on the unit and in instructions or
manuals, be alert to the potential for personal injury. Understand
these signal words; DANGER, WARNING, and CAUTION.
These words are used with the safety--alert symbol. DANGER
identifies the most serious hazards which will result in severe
personal injury or death. WARNING signifies hazards which
could result in personal injury or death. CAUTION is used to
identify unsafe practices which may result in minor personal
injury or product and property damage. NOTE is used to
highlight suggestions which will result in enhanced installation,
reliability, or operation.
FIRE, EXPLOSION, ELECTRICAL SHOCK, AND
CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in personal injury,
death, or property damage.
Improper installation, adjustment, alteration, service,
maintenance, or use could cause carbon monoxide poisoning,
explosion, fire, electrical shock, or other conditions which
may cause personal injury or property damage. Consult a
qualified service agency, local gas supplier, or your distributor
or branch for information or assistance. The qualified service
agency must use only factory--authorized and listed kits or
accessories when modifying this product.
!WARNING
FURNACE RELIABILITY HAZARD
Improper installation or misapplication of furnace may
require excessive servicing or cause premature component
failure.
Application of this furnace should be indoors with special
attention given to vent sizing and material, gas input rate, air
temperature rise, unit leveling, and unit sizing.
!CAUTION
Installing and servicing heating equipment can be hazardous due
to gas and electrical components. Only trained and qualified
personnel should install, repair, or service heating equipment.
Untrained personnel can perform basic maintenance functions
such as cleaning and replacing air filters. All other operations
must be performed by trained service personnel. When working
on heating equipment, observe precautions in literature, on tags,
and on labels attached to or shipped with furnace and other safety
precautions that may apply.
These instructions cover minimum requirements and conform to
existing national standards and safety codes. In some instances,
these instructions exceed certain local codes and ordinances,
especially those that may not have kept up with changing
residential constructions practices. We require these instructions
as a minimum for a safe installation.
CUT HAZARD
Failure to follow this caution may result in personal injury.
Sheet metal parts may have sharp edges or burrs. Use care
and wear appropriate protective clothing, safety glasses and
gloves when handling parts and servicing furnaces.
CAUTION
!
58ST

3
2-7/16"
1-1/8"
28-7/8"
25-1/4"
22-9/16"
JUNCTION BOX
LOCATION
7/8" DIA
ACCESSORY 1/2" DIA THERMOSTAT
WIRE ENTRY
3-15/16"
LEFT HAND GAS
ENTRY
33-5/16" 24-7/8"
5-1/2"
7/8" DIA. ACCESSORY
11/16"
21-5/8"
BOTTOM INLET 1-11/16"
13/16"
11/16"
4-13/16"
AIRFLOW
19"
OUTLET
13/16"
11/16"
8-9/16"
VENT OUTLET
5 PLACES (TYP)
3-3/4"
1-3/4" DIA.RIGHT HAND
GAS ENTRY
7/8" DIA. K.O. WIRE ENTRY
SIDE INLET
14-7/8"
7/8" DIA. ACCESSORY
1-1/4"
1"
22-1/16"
A
D
F
E
(FLUE COLLAR)
5-15/16"
24"
CASING
1-5/16"
1/2" DIA. K.O.THERMOSTAT
WIRE ENTRY
ALTERNATE
JUNCTION BOX
LOCATIONS (TYP)
26-1/8"
1-1/2"
7-3/4" 9-5/8"
11-1/2"
5-1/2"
NOTES:
1. Two additional 7/8-in. diameter holes are located in the top plate.
2. Minimum return-air openings at furnace, based on metal duct. If flex duct is used, see flex duct manufacturer’s recommendations for equivalent diameters.
a. For 800 CFM-16-in. round or 14 1/2 x 12-in. rectangle.
b. For 1200 CFM-20-in. round or 14 1/2 x 19 1/2-in. rectangle.
c. For 1600 CFM-22-in. round or 14 1/2 x 22-in. rectangle.
d. For airflow requirements above 1800 CFM, see Air Delivery table in Product Data literature for specific use of single side inlets. The use of both side inlets
a combination of 1 side and the bottom, or the bottom only will ensure adequate return air openings for airflow requirements above 1800 CFM.
A04037
Fig. 1 --- Dimensional Drawing
1. Use only with type of gas approved for this furnace. Refer
to the furnace rating plate.
2. Install this furnace only in a location and position as
specified in the “Location” section of these instructions.
3. Provide adequate combustion and ventilation air to the
furnace space as specified in “Air for Combustion and
Ventilation” section.
4. Combustion product must be discharged outdoors.
Connect this furnace to an approved vent system only as
specified in the “Venting” section of these instructions.
5. Never test for gas leaks with an open flame. Use a
commercially available soap solution made specifically for
the detection of leaks to check all connections, as specified
in the “Gas Piping” section.
6. Always install furnace to operate within the furnace’s
intended temperature--rise range with a duct system which
has an external static pressure within the allowable range,
as specified in the “Start--Up, Adjustments, and Safety
Check” section. See furnace rating plate.
7. When a furnace is installed so that supply ducts carry air
circulated by the furnace to areas outside the space
containing the furnace, the return air shall also be handled
by duct(s) sealed to the furnace casing and terminating
outside the space containing the furnace. See Air Ducts
section.
8. A gas--fired furnace for installation in a residential garage
must be installed as specified in the warning box in the
Location section.
9. The furnace may be used for construction heat provided
that the furnace installation and operation complies with
the first CAUTION in the LOCATION section of these
instructions.
10. These Multipoise Gas--Fired Furnaces are CSA (formerly
A.G.A. and C.G.A.) design--certified for use with natural
and propane gases (see furnace rating plate) and for
installation in alcoves, attics, basements, closets, utility
rooms, crawlspaces, and garages. The furnace is
factory--shipped for use with natural gas. A CSA listed
accessory gas conversion kit is required to convert furnace
for use with propane gas.
11. See Fig. 2 for required clearances to combustible
construction.
12. Maintain a 1--in. clearance from combustible materials to
supply air ductwork for a distance of 36 inches
horizontally from the furnace. See NFPA 90B or local
code for further requirements.
13. These furnaces SHALL NOT be installed directly on
carpeting, tile, or any other combustible material other
than wood flooring. In downflow installations, factory
accessory floor base MUST be used when installed on
combustible materials and wood flooring. Special base is
not required when this furnace is installed on
manufacturer’s Coil Assembly Part No. CAPV, CAPMP,
or CNPVP, or when Coil Box Part No. KCAKC is used.
See Fig. 2 for clearance to combustible construction
information.
INTRODUCTION
Series 120/C 4--way multipoise Category I fan--assisted furnace is
CSA design--certified. A Category I fan--assisted furnace is an
appliance equipped with an integral mechanical means to either
draw or force products of combustion through the combustion
chamber and/or heat exchanger. The furnace is factory--shipped
for use with natural gas. This furnace is not approved for
installation in mobile homes, recreational vehicles, or outdoors.
This furnace is designed for minimum continuous return--air
temperature of 60_F db or intermittent operation down to 55_F
db such as when used with a night setback thermostat. Return--air
temperature must not exceed 85_F db. Failure to follow these
return--air temperature limits may affect reliability of heat
exchangers, motors, and controls. (See Fig. 3.)
58ST

4
MINIMUM INCHES CLEARANCE TO COMBUSTIBLE CONSTRUCTION
DISTANCE MINIMALE EN POUCES AUX CONSTRUCTIONS COMBUSTIBLES
INSTALLATION
327590-101 REV. C
Ø
*
Clearance arrows
do not change with
furnace orientation.
BOTTOM
DESSOUS
0"
3"
0"
0"
1"
0"
24"
MIN
SIDE
CÔTÉ
FRONT
AVANT
BCK
ARRIÈ
A
E
R
SERVIE
C
ENTRT
E
N
E
I
V
AN
AT
FRONT
SIE
CÔTÈ
FOU
U
FRNAC
S
E
E
I
A
RN
Ø
TOP / PLENUM
DESSUS / CHAMBRED'AIR
D
*
*
†
MIN
Ø
*
†
This forced air furnace is equipped for use with
natural gas at altitudes 0-10,000 ft (0-3,050m).
An accessory kit, supplied by the
manufacturer, shall be used to convert to propane
gas use or may be required for some natural gas
applications.
This furnace is for indoor installation in a
building constructed on site.
This furnace may be installed on combustible
flooring in alcove or closet at minimum clearance
as indicated by the diagram from combusitble
material.
This furnace may be used with a Type B-1 Vent
and may be vented in common with other gas
fired appliances.
Cette fournaise à air pulsé est équipée
pour utilisation avec gaz naturel et altitudes
comprises entre 0-3,050m (0-10,000 pi).
Utiliser une trousse de conversion, fournie par
le fabricant, pour passer au gaz propane ou pour
certaines installations au gaz naturel.
Cette fournaise est prévue pour être
installée dans un bâtiment construit sur place.
Cette fournaise peut être installée sur
un plancher combustible dans une alcôve ou
dans un garde-robe en respectant le minimum
d'espace libre des matériaux combustibles, tel
qu
´ indiqué sur le diagramme.
Cette fournaise peut être utilisée avec un
conduit d
´ évacuation de Type B-1 ou connectée
au conduit ommun d 'autres appareils à gaz.
MINIMUM INCHES CLEARANCE TO COMBUSTIBLE CONSTRUCTION
Installation on non-combusibible floors only.
For Installation on combustible flooring only when installed on special base, Part No. KGASB0201ALL,
Coil Assembly, Part No. CD5 or CK5, or Coil Casing, Part No. KCAKC.
18 inches front clearance required for alcove.
Indicates supply or return sides when furnace is in the horizontal position. Line contact only permissible
between lines formed by intersections of the Top and two Sides of the furnace jacket, and building joists,
studs or framing.
DOWNFLOW POSITIONS:
DÉGAGEMENT MINIMUM EN POUCES AVEC ÉLÉMENTS
DE CONSTRUCTION COMBUSTIBLES
Pour l ´ installation sur plancher non combustible seulement.
Pour l
´ installation sur un plancher combustible seulement quand on utilise la base spéciale, pièce
nº KGASB0201ALL, l
´ ensemble serpentin, pièce nº CD5 ou CK5, ou le carter de serpentin, pièce
nº KCAKC.
Dans une alcôve, on doit maintenir un dégagement à l
´ avant de 18 po (450mm).
La poistion indiquée concerne le côté d
´ entrée ou de retour quand la fournaise est dans la
position horizontale.
Le contact n
´ est permis qu ´ entre les lignes formées par les intersections du dessus et des
deux côtés de la cherrise de la fournaise et les solives, montant sous cadre de charpente.
POUR LA POSITION COURANT DESCENDANT:
Cette fournaise est approuvée pour l 'installation HORIZONTALE
et la circulation d 'air VERS LE HAUT et VERS LE BAS.
This furnace is approved for UPFLOW, DOWNFLOW, and
HORIZONTAL installations.
Clearance in inches
Dégagement (po).
Les fléches de dégagement
ne change pas avec
l 'orientation de la fournaise.
Vent Clearance to combustibles:
For Single Wall vents 6 inches (6 po).
For Type B-1 vent type 1 inch (1 po).
Dégagement de l ´ évent avec combustibles:
Pour conduit d ´ évacuation à paroi simple 6 po (6 inches).
Pour conduit d
´ évacuation de Type B-1 1 po (1 inch).
†
A04123
Fig. 2 --- Clearances to Combustibles
60
A02055
Fig. 3 --- Return Air Temperature
For accessory installation details, refer to the applicable
instruction literature.
NOTE: Remove all shipping brackets and materials before
operating the furnace.
CODES AND STANDARDS
Follow all national and local codes and standards in addition
to these instructions. The installation must comply with
regulations of the serving gas supplier, local building, heating,
plumbing, and other codes. In absence of local codes, the
installation must comply with the national codes listed below and
all authorities having jurisdiction. In the United States and
Canada, follow all codes and standards for the following:
Step 1 —Safety
SUS: National Fuel Gas Code (NFGC) NFPA
54--2006/ANSI Z223.1--2006 and the Installation
Standards, Warm Air Heating and Air Conditioning
Systems ANSI/NFPA 90B
58ST

5
SCANADA: CSA B149.1--05 National Standard of
Canada Natural Gas and Propane Installation Codes
(CAN/CSA--B149.1--05)
Step 2 —General Installation
SUS: Current edition of the NFGC and the NFPA 90B.
For copies, contact the National Fire Protection
Association Inc., Batterymarch Park, Quincy, MA
02269; (www.NFPA.org) or for only the NFGC,
contact the American Gas Association, 400 N. Capitol
Street, N.W., Washington, DC 20001 (www.AGA.org).
SCANADA: CAN/CSA--B149.1--05. For a copy,
contact Standard Sales, CSA International, 178
Rexdale Boulevard, Etobicoke (Toronto), Ontario,
M9W 1R3 Canada
Step 3 —Combustion and Ventilation Air
SUS: Section 9.3 of the NFGC, Air for Combustion and
Ventilation
SCANADA: Part 7 of CAN/CSA--B149.1--05, Venting
Systems and Air Supply for Appliances
Step 4 —Duct Systems
SUS and CANADA: Air Conditioning Contractors
Association (ACCA) Manual D, Sheet Metal and Air
Conditioning Contractors National Association
(SMACNA), or American Society of Heating,
Refrigeration, and Air Conditioning Engineers
(ASHRAE) 2001 Fundamentals Handbook Chapter 34
or 2000 HVAC Systems and Equipment Handbook
Chapters 9 and 16.
Step 5 —Acoustical Lining and Fibrous Glass
Duct
SUS and CANADA: current edition of SMACNA and
NFPA 90B as tested by UL Standard 181 for Class I
Rigid Air Ducts .
Step 6 —Gas Piping and Gas Pipe Pressure
Testing
SUS: NFGC; chapters 5, 6, and 7 and National
Plumbing Codes .
SCANADA: CAN/CSA--B149.1--05 Part 4, 5, 6, and 9,
and Appendices A, B, E, and H.
Step 7 —Electrical Connections
SUS: National Electrical Code (NEC) ANSI/NFPA
70--2005
SCANADA: Canadian Electrical Code CSA C22.1
Step 8 —Ven ting
SUS: NFGC; chapters 12 and 13
SCANADA: CAN/CSA--B149.1--05 Part 8 and
Appendix C
SELECTROSTATIC DISCHARGE (ESD)
PRECAUTIONS PROCEDURE
FURNACE RELIABILITY HAZARD
Failure to follow this caution may result in furnace
component damage.
Electrostatic discharge can affect electronic components.
Follow the Electrostatic Discharge Precautions Procedure
listed below during furnace installation and servicing to
protect the furnace electronic control. Precautions will
prevent electrostatic discharges from personnel and hand
tools which are held during the procedure. These
precautions will help to avoid exposing the control to
electrostatic discharge by putting the furnace, the control,
and the person at the same electrostatic potential.
CAUTION
!
1. Disconnect all power to the furnace. Multiple disconnects
may be required. DO NOT TOUCH THE CONTROL OR
ANY WIRE CONNECTED TO THE CONTROL PRIOR
TO DISCHARGING YOUR BODY’S
ELECTROSTATIC CHARGE TO GROUND.
2. Firmly touch the clean, unpainted, metal surface of the
furnace chassis which is close to the control. Tools held in
a person’s hand during grounding will be satisfactorily
discharged.
3. After touching the chassis, you may proceed to service the
control or connecting wires as long as you do nothing to
recharge your body with static electricity (for example;
DO NOT move or shuffle your feet, do not touch
ungrounded objects, etc.).
4. If you touch ungrounded objects (and recharge your body
with static electricity), firmly touch a clean, unpainted
metal surface of the furnace again before touching control
or wires.
58ST

6
THE BLOWER IS LOCATED
TO THE RIGHT OF THE
BURNER SECTION, AND
AIR CONDITIONED AIR IS
DISCHARGED TO THE LEFT.
THE BLOWER IS
LOCATED BELOW THE
BURNER SECTION, AND
CONDITIONED AIR IS
DISCHARGED UPWARD.
THE BLOWER IS
LOCATED ABOVE THE
BURNER SECTION, AND
CONDITIONED AIR IS
DISCHARGED DOWNWARD
THE BLOWER IS
LOCATED TO THE LEFT
OF THE BURNER SECTION,
AND CONDITIONED AIR IS
DISCHARGED TO THE RIGHT.
A02097
Fig. 4 --- Multipoise Orientations
TABLE 1—DIMENSIONS (IN.)
FURNACE SIZE A
CABINET WIDTH
D
SUPPLY ---AIR
WIDTH (IN.)
E
RETURN---AIR
WIDTH (IN.)
F
C.L. TOP AND
BOTTOM FLUE
COLLAR (IN.)
FLUE
COLLAR*
(IN.)
SHIP WT (LB)
045---08/024045 14--- 3/16 12---9/16 12---11/16 9---5/16 4104
045---12/036045 14--- 3/16 12---9/16 12---11/16 9---5/16 4107
070---08/024070 14--- 3/16 12---9/16 12---11/16 9---5/16 4111
070---12/036070 14--- 3/16 12---9/16 12---11/16 9---5/16 4115
070---16/048070 17--- 1/2 15---7/8 16 11---9/16 4126
090---14/042090 17--- 1/2 15---7/8 16 11---9/16 4127
090---16/048090 21 19---3/8 19---1/2 13---5/16 4140
090---20/060090 21 19---3/8 19---1/2 13---5/16 4146
110---12/036110 17--- 1/2 15---7/8 16 11---9/16 4135
110---16/048110 21 19---3/8 19---1/2 13---5/16 4146
110---22/066110 21 19---3/8 19---1/2 13---5/16 4152
135---16/048135 21 19---3/8 19---1/2 13---5/16 4149
135---22/066135 24--- 1/2 22---7/8 23 15---1/16 4163
155---20/060155 24--- 1/2 22---7/8 23 15---1/16 4170
* 5 --- i n . o r 6 --- i n . v e n t c o n n e ct o r m a y b e r e qu i r ed i n s o m e c as e s.
5. Use this procedure for installed and uninstalled
(ungrounded) furnaces.
6. Before removing a new control from its container,
discharge your body’s electrostatic charge to ground to
protect the control from damage. If the control is to be
installed in a furnace, follow items 1 through 4 before
bringing the control or yourself in contact with the
furnace. Put all used and new controls into containers
before touching ungrounded objects.
7. An ESD service kit (available from commercial sources)
mayalsobeusedtopreventESDdamage.
LOCATION
GENERAL
This multipoise furnace is shipped in packaged configuration.
Some assembly and modifications are required when used in any
of the four applications shown in Fig. 4.
This furnace must:
Sbe installed so the electrical components are protected
from water.
Snot be installed directly on any combustible material
other than wood flooring (refer to SAFETY
CONSIDERATIONS).
Sbe located as close to the chimney or vent and attached
to an air distribution system. Refer to Air Ducts section.
Sbe provided ample space for servicing and cleaning.
Always comply with minimum fire protection
clearances shown on the furnace clearance to
combustible label.
58ST

7
CARBON MONOXIDE POISONING AND UNIT
DAMAGE HAZARD
Failure to follow this warning could result in personal
injury or death, and unit component damage.
Corrosive or contaminated air may cause failure of parts
containing flue gas, which could leak into the living space.
Air for combustion must not be contaminated by halogen
compounds, which include fluoride, chloride, bromide, and
iodide. These elements can corrode heat exchangers and
shorten furnace life. Air contaminants are found in aerosol
sprays, detergents, bleaches, cleaning solvents, salts, air
fresheners, and other household products. Do not install
furnace in a corrosive or contaminated atmosphere. Make
sure all combustion and circulating air requirements are met,
in addition to all local codes and ordinances.
!WARNING
SThe following types of furnace installations may
require OUTDOOR AIR for combustion due to
chemical exposures:
SCommercial buildings
SBuildings with indoor pools
SLaundry rooms
SHobby or craft rooms, and
SChemical storage areas
If air is exposed to the following substances, it should not be used
for combustion air, and outdoor air may be required for
combustion:
SPermanent wave solutions
SChlorinated waxes and cleaners
SChlorine based swimming pool chemicals
SWater softening chemicals
SDe--icing salts or chemicals
SCarbon tetrachloride
SHalogen type refrigerants
SCleaning solvents (such as perchloroethylene)
SPrinting inks, paint removers, varnishes, etc.
SHydrochloric acid
SCements and glues
SAntistatic fabric softeners for clothes dryers
SMasonry acid washing materials
All fuel--burning equipment must be supplied with air for fuel
combustion. Sufficient air must be provided to avoid negative
pressure in the equipment room or space. A positive seal must be
made between the furnace cabinet and the return--air duct to
prevent pulling air from the burner area and from draft safeguard
opening.
FIRE AND EXPLOSION HAZARD
Failure to follow this warning could result in personal
injury, death, and/or property damage. or explosion.
When the furnace is installed in a residential garage, the
burners and ignition sources must be located at least 18
inches above the floor. The furnace must be located or
protected to avoid damage by vehicles. When the furnace is
installed in a public garage, airplane hangar, or other
building having a hazardous atmosphere, the furnace must
be installed in accordance with the NFGC or
CAN/CSA--B149.1--05 (See Fig. 5.)
!WARNING
PERSONAL INJURY AND/OR PROPERTY
DAMAGE HAZARD
Failure to follow this caution may result in furnace
component damage.
This gas furnace may be used for heating buildings under
construction provided that:
--The furnace is permanently installed with all electrical
wiring, piping, venting and ducting installed according to
these installation instructions. A return air duct is provided,
sealed to the furnace casing, and terminated outside the
space containing the furnace. This prevents a negative
pressure condition as created by the circulating air blower,
causing a flame roll--out and/or drawing combustion
products into the structure.
--The furnace is controlled by a thermostat. It may not be
hot wired to provide heat continuously to the structure
without thermostatic control.
--Clean outside air is provided for combustion. This is to
minimize the corrosive effects of adhesives, sealers and
other construction materials. It also prevents the
entrainment of drywall dust into combustion air, which can
cause fouling and plugging of furnace components.
--The temperature of the return air to the furnace is
maintained between 55_F(13_C) and 80_F(27_C), with
no evening setback or shutdown. The use of the furnace
while the structure is under construction is deemed to be
intermittent operation per our installation instructions.
--The air temperature rise is within the rated rise range on
the furnace rating plate, and the gas input rate has been set
to the nameplate value.
--The filters used to clean the circulating air during the
construction process must be either changed or thoroughly
cleaned prior to occupancy.
--The furnace, ductwork and filters are cleaned as necessary
to remove drywall dust and construction debris from all
HVAC system components after construction is completed.
--Verify proper furnace operating conditions including
ignition, gas input rate, air temperature rise, and venting
according to these installation instructions.
CAUTION
!
58ST

8
18-IN. MINIMUM
TO BURNERS
A93044
Fig. 5 --- Installation in a Garage
FIRE HAZARD
Failure to follow this warning could result in personal
injury, death and/or property damage.
Do not install the furnace on its back or hang furnace with
control compartment facing downward. Safety control
operation will be adversely affected. Never connect
return--air ducts to the back of the furnace. (See Fig. 6.)
!WARNING
A02054
Fig. 6 --- Prohibit Installation on Back
LOCATION RELATIVE TO COOLING EQUIPMENT
The cooling coil must be installed parallel with, or on the
downstream side of the unit to avoid condensation in the heat
exchangers. When installed parallel with the furnace, dampers or
other flow control must prevent chilled air from entering the
furnace. If the dampers are manually operated, they must be
equipped with means to prevent operation of either unit unless
the damper is in the full--heat or full--cool position.
AIR FOR COMBUSTION AND
VENTILATION
Provisions for adequate combustion, ventilation, and dilution air
must be provided in accordance with:
SU.S. installations: Section 9.3 of the NFGC, Air for
Combustion and Ventilation, and applicable provisions
of the local building codes.
SCanadian installations: Part 8 of
CAN/CSA--B149.1--05, Venting Systems and Air
Supply for Appliances, and all authorities having
jurisdiction.
FURNACE CORROSION HAZARD
Failure to follow this caution may result in furnace damage.
Air for combustion must not be contaminated by halogen
compounds, which include fluoride, chloride, bromide, and
iodide. These elements can corrode heat exchangers and
shorten furnace life. Air contaminants are found in aerosol
sprays, detergents, bleaches, cleaning solvents, salts, air
fresheners, and other household products.
CAUTION
!
CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in personal
injury or death.
The operation of exhaust fans, kitchen ventilation fans,
clothes dryers, attic exhaust fans or fireplaces could create a
NEGATIVE PRESSURE CONDITION at the furnace.
Make--up air MUST be provided for the ventilation devices,
in addition to that required by the furnace. Refer to Carbon
Monoxide Poisoning Hazard warning in venting section of
these instructions to determine if an adequate amount of
make--up air is available.
!WARNING
The requirements for combustion and ventilation air depend
upon whether or not the furnace is located in a space having a
volume of at least 50 cu/ft. per 1,000 Btuh input rating for all gas
appliances installed in the space.
SSpaces having less than 50 cu/ft. per 1,000 Btuh
require the OUTDOOR COMBUSTION AIR
METHOD.
SSpaces having at least 50 cu/ft. per 1,000 Btuh may use
the INDOOR COMBUSTION AIR, STANDARD or
KNOWNAIR INFILTRATION METHOD.
Outdoor Combustion Air Method
1. Provide the space with sufficient air for proper
combustion, ventilation, and dilution of flue gases using
permanent horizontal or vertical duct(s) or opening(s)
directly communicating with the outdoors or spaces that
freely communicate with the outdoors.
2. Fig. 7 illustrates how to provide TWO OUTDOOR
OPENINGS, one inlet and one outlet combustion and
ventilation air opening, to the outdoors.
a. One opening MUST commence within 12 in. (300
mm) of the ceiling and the second opening MUST
commence within 12 in. (300 mm) of the floor.
b. Size openings and ducts per Fig. 7 and Table 2.
c. TWO HORIZONTAL DUCTS require 1 sq./in. of free
area per 2,000 Btuh (1,100 mm2/kW) of combined
input for all gas appliances in the space per Fig. 7 and
Table 2.
d. TWO OPENINGS OR VERTICAL DUCTS require 1
sq./in. of free area per 4,000 Btuh (550 mm2/kW) for
combined input of all gas appliances in the space per
Fig. 7 and Table 2.
58ST

9
TABLE 2—MINIMUM FREE AREA REQUIRED FOR EACH COMBUSTION AIR OPENING OR DUCT TO OUTDOORS
FUR-
NACE IN-
PUT
(BTUH)
TWO HORIZONTAL DUCTS
(1 SQ. IN./2,000 BTUH) (1,100 SQ. MM/KW)
SINGLE DUCT OR OPENING
(1 SQ. IN./3,000 BTUH) (734 SQ. MM/KW)
TWO OPENINGS OR VERTICAL DUCTS
(1 SQ. IN./4,000 BTUH) (550 SQ. MM/KW)
Free Area of Opening
and Duct (Sq.. In.)
Round Duct (in.
Dia)
Free Area of Open-
ing and Duct (sq.
In.)
Round Duct
(in. Dia)
Free Area of Open-
ing and Duct (Sq.
In.)
Round Duct
(In. Dia)
44,000 22 614.7 511 4
66,000 33 722 616.5 5
88,000 44 829.3 722 6
110,000 55 936.7 727.5 6
132,000 66 10 44 833 7
154,000 77 10 51.3 938.5 8
EXAMPLES: Determining Free Area
FURNACE WATER HEATER TOTAL INPUT
110,000 + 30,000 = (140,000 divided by 4,000) = 35.0 Sq. In. for each two Vertical Ducts or Openings
66,000 + 40,000 = (106,000 divided by 3,000) = 35.3 Sq. In. for a Single Duct or Opening
88,000 +30,000 =(118,000 divided by 2,000) =59.0 Sq. In. for each of two Horizontal Ducts
TABLE 3—MINIMUM SPACE VOLUMES FOR 100% COMBUSTION, VENTILATION, AND DILUTION FROM INDOORS
ACH
OTHER THAN FAN---ASSISTED
TOTAL
(1,000’S BTUH GAS INPUT RATE)
FAN---ASSISTED TOTAL
(1000’S BTUH GAS INPUT RATE)
30 40 50 44 66 88 110 132 154
SpaceVolume(ft.
3)
0.60 1,050 1,400 1,750 1,100 1,650 2,200 2,750 3,300 3,850
0.50 1,260 1,680 2,100 1,320 1,980 2,640 3,300 3,960 4,620
0.40 1,575 2,100 2,625 1,650 2,475 3,300 4,125 4,950 5,775
0.30 2,100 2,800 3,500 2,200 3,300 4,400 5,500 6,600 7,700
0.20 3,150 4,200 5,250 3,300 4,950 6,600 8,250 9,900 11,550
0.10 6,300 8,400 10,500 6,600 9,900 13,200 16,500 19,800 23,100
0.00 NP NP NP NP NP NP NP NP NP
3. ONE OUTDOOR OPENING requires:
a. 1 square inch of free area per 3,000 Btuh (734
mm2/kW) for combined input of all gas appliances in
the space per Table 2 and
b. Not less than the sum of the areas of all vent
connectors in the space.
The opening shall commence within 12 in. (300 mm) of the
ceiling. Appliances in the space shall have clearances of at least 1
in. (25 mm) from the sides and back and 6 in. (150 mm) from the
front. The opening shall directly communicate with the outdoors
or shall communicate through a vertical or horizontal duct to the
outdoors or spaces (crawl or attic) that freely communicate with
the outdoors.
Indoor Combustion Air NFPA
Standard and Known--Air--Infiltration Rate Methods
Indoor air is permitted for combustion, ventilation, and dilution,
if the Standard or Known--Air--Infiltration Method is used.
CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in death and/or
personal injury.
Many homes require air to be supplied from outdoors for
furnace combustion, ventilation, and dilution of flue gases.
The furnace combustion air supply must be provided in
accordance with this instruction manual.
!WARNING
The Standard Method:
1. The space has no less volume than 50 cu/ft. per 1,000
Btuh of the maximum input ratings for all gas appliances
installed in the space and
2. The air infiltration rate is not known to be less than 0.40
air changes per hour (ACH).
The Known Air Infiltration Rate Method shall be used, if the
infiltration rate is known to be:
1. Less than 0.40 ACH and
2. Equal to or greater than 0.10 ACH
Infiltration rates greater than 0.60 ACH shall not be used. The
minimum required volume of the space varies with the number of
ACH and shall be determined per Table 3 or Equations 1 and 2.
Determine the minimum required volume for each appliance in
the space and add the volumes together to get the total minimum
required volume for the space.
58ST

10
1 SQ IN.
PER
4000
BTUH*
DUCTS
TO
OUTDOORS
1 SQ IN.
PER 4000
BTUH*
CIRCULATING
AIR DUCTS
VENT
THROUGH
ROOF
D
B
A
C
E
1 SQ IN.
PER 4000
BTUH*
DUCT
TO
OUTDOORS
CIRCULATING AIR DUCTS
1 SQ IN.
PER 2000
BTUH*
1 SQ IN.
PER 2000
BTUH*
DUCTS
TO
OUTDOORS
12″MAX
12″MAX
12″MAX
Use any of the following
combinations of openings:
A & B C & D D & E F & G
NOTE:
*
Minimum dimensions of 3 in.
12″
MAX
12″
MAX
OUTDOORS
1 SQ IN.
PER
4000
BTUH*
F
G
CLEARANCE IN FRONT
OF COMBUSTION AIR
OPENINGS SHALL BE
AT LEAST 3 IN.
A03174
Fig. 7 --- Air for Combustion, Ventilation, and Dilution for
Outdoors
Table 3--Minimum Space Volumes were determined by using
the following equations from the National Fuel Gas Code ANSI
Z223.1--2006/NFPA 54--2006, 9.3.2.2:
1. For other than fan--assisted appliances, such as a draft
hood--equipped water heater:
Volume
Other
=21ft
3
ACH
I
other
1000 Btu/hr
A04002
2. For fan--assisted appliances such as this furnace:
Volume
Fan
=15ft
3
ACH
I
fan
1000 Btu/hr
A04003
If:
Iother = combined input of all other than fan--assisted
appliances in Btuh/hr
Ifan = combined input of all fan--assisted appliances in Btuh/hr
ACH = air changes per hour (ACH shall not exceed 0.60.) The
following requirements apply to the Standard Method and to the
Known Air Infiltration Rate Method.
1. Adjoining rooms can be considered part of a space if:
a. There are no closable doors between rooms.
CIRCULATING AIR
DUCTS
6" MIN
(FRONT)
†
CIRCULATING AIR DUCTS
VENT THROUGH ROOF
1 SQ IN.
PER 1000
BTUH* IN DOOR
OR WALL
12" MAX
1 SQ IN.
PER 1000
BTUH* IN DOOR
OR WALL
12" MAX
* Minimum opening size is 100 sq in. with
minimum dimensions of 3 in.
†
Minimum of 3 in.. when t
yp
e-B1 vent is used.
UNCONFINED
SPACE
INTERIOR
HEATED
SPACE
CLEARANCE IN FRONT OF COMBUSTION AIR
OPENINGS SHALL BE AT LEAST 3 IN.
A03175
Fig. 8 --- Air for Combustion, Ventilation, and Dilution From
Indoors
b. Combining spaces on same floor level. Each opening
shall have free area of at least 1 in.2/1,000 Btuh (2,000
mm2/kW) of the total input rating of all gas appliances
in the space, but not less than 100 in.2(0.06 m2). One
opening shall commence within 12 in. (300 mm) of
the ceiling and the second opening shall commence
within 12 in. (300 mm) of the floor. The minimum
dimension of air openings shall be at least 3 in. (80
mm).(SeeFig.8.)
c. Combining space on different floor levels. The
volumes of spaces on different floor levels shall be
considered as communicating spaces if connected by
one or more permanent openings in doors or floors
having free area of at least 2 in.2/1,000 Btuh (4,400
mm2/kW) of total input rating of all gas appliances.
2. An attic or crawlspace may be considered a space that
freely communicates with the outdoors provided there are
adequate permanent ventilation openings directly to
outdoors having free area of at least 1--in.2/4,000 Btuh of
total input rating for all gas appliances in the space.
3. In spaces that use the Indoor Combustion Air Method,
infiltration should be adequate to provide air for
combustion, permanent ventilation and dilution of flue
gases. However, in buildings with unusually tight
construction, additional air MUST be provided using the
methods described in the Outdoor Combustion Air
Method section.
58ST