Carrier Performance 59SP5A Guide

Installation, Start-up, Operating and
Service and Maintenance Instructions
NOTE: Read the entire instruction manual before starting the
installation.
SAFETY CONSIDERATIONS ......................... 3
INTRODUCTION ................................... 4
CODES AND STANDARDS ........................... 4
ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS ... 4
ACCESSORIES ..................................... 5
LOCATION ........................................ 7
General ......................................... 7
AIR FOR COMBUSTION AND VENTILATION ......... 10
Introduction .................................... 10
CONDENSATE TRAP ............................... 13
Upflow ........................................ 13
Downflow ..................................... 13
Horizontal Right ................................. 14
Horizontal Left .................................. 14
CONDENSATE DRAIN ............................. 18
INSTALLATION ................................... 20
Upflow ........................................ 20
Downflow ..................................... 20
Horizontal ...................................... 21
Filter Arrangement ............................... 22
AIR DUCTS ....................................... 28
General Requirements ............................. 28
Ductwork Acoustical Treatment ..................... 28
GAS PIPING ...................................... 29
ELECTRICAL CONNECTIONS ....................... 30
115-V Wiring ................................... 30
J-Box Installation ................................ 31
24-V Wiring .................................... 31
Accessories ..................................... 31
Alternate Power Supplies .......................... 31
VENTING ........................................ 37
Special Venting Requirements for Installations in Canada . 37
General ........................................ 37
Materials ....................................... 38
Venting Systems ................................. 38
Locating the Vent Termination ...................... 38
Combustion Air and Vent Piping Insulation Guidelines ... 39
START-UP, ADJUSTMENT, AND SAFETY CHECK ...... 57
General ......................................... 57
Prime Condensate Trap ............................. 57
Purge Gas Lines ................................... 57
Adjustments ...................................... 57
SERVICE AND MAINTENANCE PROCEDURES ........ 65
Cleaning Heat Exchangers ........................... 70
SEQUENCE OF OPERATION ........................ 75
PARTS REPLACEMENT GUIDE ...................... 80
TABLES
Loose Parts Bag ..................................... 5
Minimum Clearances to Combustible Materials ............. 8
Minimum Free Area Required ......................... 12
Minimum Space Volumes ............................. 12
Filter Size Information ............................... 22
Opening Dimensions ................................ 24
Air Delivery CFM ................................... 28
Maximum Capacity of Pipe ........................... 30
Electrical Data ...................................... 32
Vent Ternfination Kit for Direct Vent (2-Pipe) System ....... 38
Combustion-Air Vent Pipe, Fitting & Cement Material ....... 42
Maxinmm Allowable Exposed Vent Lengths Insulation ...... 43
Maximum Equivalent Vent Length ...................... 44
Deductions from Maximum Equivalent Vent Length ........ 44
Blower Speed Taps .................................. 59
Blower Off Delay Setup Switch ........................ 59
Altitude DerateMultiplierfor U.S.A..................... 60
Gas Rate .......................................... 62
Orifice Size and Manifold Pressure ..................... 63
_Always Ask For
Use of the AHRI Certified
TM Mark indicales a
manufacturer's
participalion in the
program For verification
of certification [or individual
products, go to
www ahddirectory org ISO9001
Portions of the text and tables are reprinted from NFPA 54/ANSI
Z223.1-2009©, with permission of National 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 entirety.

Required Notice for Massachusetts Installations
IMPORTANT
The Commonwealth of Massachusetts requires compliance with regulation 248 CMR as follows:
5.08: Modifications to NFPA-54, Chapter 10
2) Revise 10.8.3 by adding the following additional requirements:
a. For all side wall horizontally vented gas fueled equipment installed in every dwelling, building or structure used in
whole or in part for residential purposes, including those owned or operated by the Commonwealth and where the
side wall exhaust vent termination is less than seven (7) feet above finished grade in the area of the venting,
including but not limited to decks and porches, the following requirements shall be satisfied:
1. INSTALLATION OF CARBON MONOXIDE DETECTORS. At the time of installation of the side wall horizontal vented
gas fueled equipment, the installing plumber or gasfitter shall observe that a hard wired carbon monoxide detector with an
alarm and battery back-up is installed on the floor level where the gas equipment is to be installed. In addition, the installing
plumber or gasfitter shall observe that a battery operated or hard wired carbon monoxide detector with an alarm is installed on
each additional level of the dwelling, building or structure served by the side wall horizontal vented gas fueled equipment. It
shall be the responsibility of the property owner to secure the services of qualified licensed professionals for the installation of
hard wired carbon monoxide detectors
a. In the event that the side wall horizontally vented gas fueled equipment is installed in a crawl space or an attic, the hard wired
carbon monoxide detector with alarm and battery back-up may be installed on the next adjacent floor level.
b. In the event that the requirements of this subdivision can not be met at the time of completion of installation, the owner shall
have a period of thirty (30) days to comply with the above requirements; provided, however, that during said thirty (30) day
period, a battery operated carbon monoxide detector with an alarm shall be installed.
2. APPROVED CARBON MONOXIDE DETECTORS. Each carbon monoxide detector as required in accordance with the
above provisions shall comply with NFPA 720 and be ANSI/UL 2034 listed and IAS certified.
3. SIGNAGE. A metal or plastic identification plate shall be permanently mounted to the exterior of the building at a minimum
height of eight (8) feet above grade directly in line with the exhaust vent terminal for the horizontally vented gas fueled
heating appliance or equipment. The sign shall read, in print size no less than one-half (1/2) inch in size, "GAS VENT
DIRECTLY BELOW. KEEP CLEAR OF ALL OBSTRUCTIONS".
4. INSPECTION. The state or local gas inspector of the side wall horizontally vented gas fueled equipment shall not approve the
installation unless, upon inspection, the inspector observes carbon monoxide detectors and signage installed in accordance
with the provisions of 248 CMR 5.08(2)(a)1 through 4.
5. EXEMPTIONS: The following equipment is exempt from 248 CMR 5.08(2)(a)1 through 4:
(1.) The equipment listed in Chapter 10 entitled "Equipment Not Required To Be Vented" in the most current edition of
NFPA 54 as adopted by the Board; and
(2.) Product Approved side wall horizontally vented gas fueled equipment installed in a room or structure separate from
the dwelling, building or structure used in whole or in part for residential purposes.
c. MANUFACTURER REQUIREMENTS - GAS EQUIPMENT VENTING SYSTEM PROVIDED. When the
manufacturer of Product Approved side wall horizontally vented gas equipment provides a venting system design
or venting system components with the equipment, the instructions provided by the manufacturer for installation of
the equipment and the venting system shall include:
1. Detailed instructions for the installation of the venting system design or the venting system components; and
2. A complete parts list for the venting system design or venting system.
d. MANUFACTURER REQUIREMENTS - GAS EQUIPMENT VENTING SYSTEM NOT PROVIDED. When
the manufacturer of a Product Approved side wall horizontally vented gas fueled equipment does not provide the
parts for venting the flue gases, but identifies "special venting systems", the following requirements shall be
satisfied by the manufacturer:
1. The referenced "special venting system" instructions shall be included with the appliance or equipment installation
instructions; and
2. The "special venting systems" shall be Product Approved by the Board, and the instructions for that system shall include a
parts list and detailed installation instructions.
e. A copy of all installation instructions for all Product Approved side wall horizontally vented gas fueled equipment,
all venting instructions, all parts lists for venting instructions, and/or all venting design instructions shall remain
with the appliance or equipment at the completion of the installation.
For questions regarding these requirements, please contact the Commonwealth of Massachusetts Board of State Examiners of Plumbers and
Gas Fitters, 239 Causeway Street, Boston, MA 02114. 617-727-9952.

SAFETY CONSIDERATIONS
FIRE, EXPLOSION, ELECTRICAL SHOCK, AND
CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in dangerous
operation, personal iniury, death, or property damage.
Improper installation, adjustment, alteration, service,
maintenance, or use can cause carbon monoxide poisoning,
explosion, fire, electrical shock, or other conditions which
may cause personal iniury or property damage. Consult a
qualified service agency, local gas supplier, or your
distributor or branch for information or assistance. The
qualified service agency nmst use only factory-authorized
and listed kits or accessories when modifying this product.
FURNACE RELIABILITY HAZARD
Failure to follow this caution may result in unit component
damage.
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.
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 nmst use factory-authorized kits or accessories
when modifying this product. Refer to the individual instructions
packaged with the kits or accessories when installing.
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 construction practices. We require these instructions as a
minimum for a safe installation.
Follow all safety codes. Wear safety glasses, protective clothing,
and work gloves. Have a fire extinguisher available. Read these
instructions thoroughly and follow all warnings or cautions
included in literature and attached to the unit.
CUT HAZARD
Failure to follow this caution may result in personal iniury.
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.
This is the safety-alert symbol A'x When you see this symbol on
the furnace and in instructions or manuals, be alert to the potential
for personal iniury.
Understand the 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 iniury or death. WARNING signifies a hazard
which could result in personal iniury or death. CAUTION is used
to identify hazards which may result in nfinor personal iniury or
product and property damage. NOTE is used to highlight
suggestions which will result in enhanced installation, reliability, or
operation.
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 spe-
cified in the "Location" section of these instructions.
3. Provide adequate combustion and ventilation air to the fur-
nace space as specified in "Air for Combustion and Ventila-
tion" section.
4. Combustion products must be discharged outdoors. Con-
nect this furnace to an approved vent system only, as spe-
cified in the "Venting" section of these instructions.
5. Never test for gas leaks with an open flame. Use a commer-
cially available soap solution made specifically for the de-
tection of leaks to check all connections, as specified in the
"Gas Piping" section.
6. Always install furnace to operate within the furnace's inten-
ded temperature-rise range with a duct system which has an
external static pressure within the allowable range, as spe-
cified 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 contain-
ing the furnace, the return air shall also be handled by
duct(s) sealed to the furnace casing and ternfinating outside
the space containing the furnace. See "Air Ducts" section.
8. A gas-fired furnace for installation in a residential garage
nmst 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 instruc-
tions.
10. These Multipoise Gas-Fired Furnaces are CSA design-cer-
tified for use with natural and propane gases (see furnace
rating plate) and for installation in alcoves, attics, base-
ments, closets, utility rooms, crawlspaces, and garages. The
furnace is factory-shipped for use with natural gas. A CSA
(A.G.A. and C.G.A.) listed accessory gas conversion kit is
required to convert furnace for use with propane gas.
11. See Table 2 for required clearances to combustible con-
struction.
12. Maintain a 1-in. (25 ram) clearance from combustible ma-
terials to supply air ductwork for a distance of 36 in. (914
ram) horizontally from the furnace. See NFPA 90B or local
code for further requirements.
13. These furnaces SHALL NOT be installed directly on carpet-
ing, tile, or any other combustible material other than wood
flooring. In downflow installations, factory accessory floor
base MUST be used when installed on combustible materi-
als and wood flooring. Special base is not required when
this furnace is installed on manufacturer's Coil Assembly
Part No. CNRV, CNPV, CAP, or CAR or when Coil Box
Part No. KCAKC is used. See Table 2 for clearance to com-
bustible construction information.
il

g
INTRODUCTION
This 4-way multipoise Category IV condensing furnace is CSA
design-certified as a direct (2-pipe) or non-direct vent (1-pipe)
furnace. (See Fig. 2.)The furnace is factory-shipped for use with
natural gas. The furnace can be converted in the field for use with
propane gas when a factory-supplied conversion kit is used. Refer
to the furnace rating plate for conversion kit information.
This furnace is approved for installation in a mobile home when a
factory-supplied accessory mobile home conversion kit is used.
The conversion kit is required for use with both natural and
propane gas. The furnace must also be installed on a
factory-supplied accessory combustible floor base or evaporator
coil casing.
This furnace is designed for minimum continuous return-air
temperature of 60°F (15°C) db or intermittent operation down to
55°F (13°C) db such as when used with a night setback
thermostat. Return-air temperature must not exceed 80°F (27°C)
db. Failure to follow these return-air temperature limits may affect
reliability of heat exchangers, motors, and controls. (See Fig. 3).
The furnace should be sized to provide 100 percent of the design
heating load requirement plus any margin that occurs because of
furnace model size capacity increments. Heating load estimates can
be made using approved methods available from Air Conditioning
Contractors of America (Manual J); American Society of Heating,
Refrigerating, and Air-Conditioning Engineers; or other approved
engineering methods. Excessive oversizing of the furnace could
cause the furnace and/or vent to fail prematurely.
For accessory installation details, refer to the applicable instruction
literature.
NOTE: Remove all shipping materials, loose parts bag, and
literature before operating the furnace. (See Table 1).
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:
Safet2_
• US: National Fuel Gas Code (NFGC) NFPA 54-2009/ANSI
Z223.1-2009 and the Installation Standards, Warm Air Heating
and Air Conditioning Systems ANSI/NFPA 90B
• A manufactured (Mobile) home installation must conform with
the Manufactured Home Construction and Safety Standard, Title
24 CFR, Part 3280, or when this standard is not @plicable, the
Standard for Manufactured Home Installation (Manufactured
Home Sites, Communities, and Set-Ups),ANSI/NCS A225.1,
and/or CAN/CSA-Z240, MH Series Mobile Homes
• CANADA: National Standard of Canada, Natural Gas and
Propane Installation Code (NSCNGPIC CAN/CSA
B149.1-2010
General Installation
• US: NFGC and the NFPA 90B. For copaes, contact the National
Fire Protection Association Inc., Batterymarch Park, Quincy,
MA 02269; or for only the NFGC contact the American Gas
Association, 400 N. Capitol, N.W., Washington DC 20001
• CANADA: NSCNGPIC. For a copy, contact Standard Sales,
CSA International, 178 Rexdale Boulevard, Etobicoke
(Toronto), Ontario, Mgw IR3, Canada
Combustion and Ventilation Air
• US: Section 9.3 of the NFPA54/ANSI Z223.1-2009 Air for
Combustion and Ventilation
• CANADA: Part 8 of the CAN/CSA B149.1-2010, Venting
Systems and Air Supply for Appliances
Duct Systems
•US 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) 2005
Fundamentals Handbook Chapter 35
Acoustical Lining and Fibrous Glass Duct
• US and CANADA: current edition of SMACNA, NFPA 90B as
tested by UL Standard 181 for Class I Rigid Air Ducts
Gas Piping and Gas Pipe Pressure Testing
• US: NFPA 54/ANSI Z223.1-2009 NFGC; Chapters 5, 6, 7, and 8
and national plumbing codes.
CANADA: CAN/CSA-BI49A-2010, Parts 4, 5, 6, and 9.
In the state of Massachusetts:
• This product must be installed by a licensed plumber or gas fitter.
• When flexible connectors are used, the maximum length shall
not exceed 36 in. (914 mm).
• When lever type gas shutoffs are used they shall be T-handle type.
• The use of copper tubing for gas piping is not approved by the
state of Massachusetts.
Electrical Connections
• US: National Electrical Code (NEC) ANSI/NFPA 70-2011
• CANADA: Canadian Electrical Code CSA C22.1
ELECTROSTATIC DISCHARGE (ESD)
PRECAUTIONS PROCEDURE
FURNACE RELIABILITY HAZARD
Failure to follow this caution may result in unit component
damage.
Electrostatic discharge can affect electronic components.
Take precautions 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.
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 fur-
nace chassis which is close to the control. Tools held in a
person's hand during grounding will be satisfactorily dis-
charged.
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.
5. Use this procedure for installed and uninstalled (ungroun-
ded) 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 I through 4 before bringing the con-
trol 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)
may also be used to prevent ESD damage.
ACCESSORIES
See Product Data Sheet for a list of accessories for this product.
Qty
1
1
2
10
1
2
1
1
1
1
2
1
1
1
1
1
1
3
1
Table 1 -Loose Parts Bag Contents (Provided in blower compartment)
Description
Air Intake Pipe Flange
Vent Pipe Flange
Coupling Flange Gaskets
Sharp Tip Screws (Vent and Inlet Flanges)
Vent Pipe Coupling
Vent Pipe Coupling Clamps
Pressure Switch Tube
Outlet Choke Plate (used with 40k BTUH furnaces, only)
Drain Tube Elbow
Drain Extension Tube
Drain Tube Clamps
Drain Line Grommet
Gas Line Grommet
Gas Line Knockout Plug
Junction Box Cover
Junction Box Base
Green Ground Screw
Blunt Tip Screws (Junction Box)
Thermostat Wire Grommet

615/II
[176.1]
11/16
[170.11
2 3/10
[58.41
176,21
VENT
FURNACE SIZE
(MODELS)
(59SP5)
040,10
060-14
580,16
100-16
120-22
A
(CABINET WIDTH)
inches mm
14 3/16 361
17112 445
21 533
24 1/2 622
B
(OUTLET WIDTH)
_nches mm
12 1/2 319
15 7/8 403
19 3/8 492
22 718 581
C
(BO]q-OM INLET WIDTH)
inches mm
12 9/16 322
16 406
19 1/2 495
23 584
D SHIPPING
WEIGHT
inches mm LBS KG
7 1/8 181 120.9 54.0
141,6 63.4
83!4 222 151,0 67,9
10 1/2 267 165.5 74.5
12 1/4 311 169.5 653
26 11116
[678.1]
263/8
[670.0]
25 1/8
[62O.7]
23 5/16
1592.9]
¢,7/8 _
A_RFLOW 12_.31
CONDENSATE DRAIN TRAP
LOCATION \\\\
7/8 .......... _-_
THERMOSTAT ENTRY
_7/8 ....
122.21 _q_
SIDE INLET
126.4] 22
[55&3]
[634.0]
265/16
166S.6!
-_3
[76.2|
/AIR INTAKE
,;hI 3/4
/ 'CONN
[76.2]
VENT
[22.2] POWER CONN
169/16
[42O.9]
1413/16
[376.3]
2O
[61
175/16
[439.2]
_4 25
9] [6:
22" /15
[58 .9|
28
[71
/16
,.1]
,91 1_
28 /8
[_ ,4]
_A_
_B_ OUTLET WIDTH
AIR FLOW
® ® 'l
' ® ® , _i °]_
11/16_4_c__11/16
[17,5] BOTTOM RETURN [17.5]
WIDTH
116
L7]
2_
_3
[76,2]
AIR INTAKE
[76.2] I
21
IZ
_8
;.9]
15/16
[_._l
8
rD
NOTE: ALL DIMENSIONS IN INCH [MM]
291/2
[749,3]
283/4
Fa0,51
26 11116
[678.1 ]
_3/8
[37o.01
;_ 7/16
[670.0]
21 1/16
AIR FLOW
f
\F_I 3/4
,' F[44.5]
_" GAS CONN
.,,_ _ _ [22.2]
................._ 7/8
[22.21
THERMOSTAT ENTRY
_' _ 7/8
_i_--i [22.2] POWER CONN
SIDE INLET _q_
I
[2&4]
233/8
[S_2.0]
265/16
[658,6]
$D_,024 4

LOCATION
PERSONAL INJURY AND/OR PROPERTY
DAMAGE HAZARD
Improper use or installation of this furnace may result in
premature furnace component failure. 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 rollout 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.
General
These furnaces are shipped with the following materials to assist in
proper furnace installation. These materials are shipped in the
main blower compartment.
See Table 1 for loose parts bag contents.
This furnace must:
• be installed so the electrical components are protected from
water.
• not be installed directly on any combustible material other than
wood flooring (refer to SAFETY CONSIDERATIONS).
• be located close to the chimney or vent and attached to an air
distribution system. Refer to Air Ducts section.
• be provided ample space for servicing and cleaning. Always
comply with minimum fire protection clearances shown in Table
2 or on the furnace clearance to combustible construction label.
CARBON MONOXIDE POISONING /COMPONENT
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
ftlrnace in a corrosive or contaminated atmosphere. Make
sure all combustion and circulating air requirements are met,
in addition to all local codes and ordinances.
The following types of furnace installations may require
OUTDOOR AIR for combustion due to chemical exposures:
• Commercial buildings
• Buildings with indoor pools
• Laundry rooms
• Hobby or craft rooms
• Chemical 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:
• Permanent wave solutions
• Chlorinated waxes and cleaners
• Chlorine based swimming pool chemicals
• Water softening chemicals
• De-icing salts or chemicals
• Carbon tetrachloride
• Halogen type refrigerants
• Cleaning solvents (such as perchloroethylene)
• Printing inks, paint removers, varnishes, etc.
• Hydrochloric acid
• Cements and glues
• Antistatic fabric softeners for clothes dryers
• Masonry 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.
FIRE, INJURY OR DEATH HAZARD
Failure to follow this warning could result in personal
iniury, death and/or property damage.
When the furnace is installed in a residential garage, the
burners and ignition sources must be located at least 18 in.
(457 mm) 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 NFPA 54/ANSI
Z223.1-2009 or CAN/CSA B149.2-2010. (See Fig. 5.)
ii

FIRE HAZARD
Failure to follow this warning could result in personal
iniury, 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. 4.)
Location Relative to Cooling Equipment
The cooling coil nmst 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 nmst be
equipped with means to prevent operation of either unit unless the
damper is in the full-heat or full-cool position.
ii Table 2-Minimum Clearances to Combustible Materials for All Units
POSITION CLEARANCE
REAR 0
FRONT (Combustion air openings in furnace and in structure) 1 in. (25 mm)
Required for service *24 in. (610 mm)
All Sides of Supply Plenum 1 in. (25 mm)
Sides 0
Vent 0
Top of Furnace 1 in. (25 mm)
Recommended

AIRFLOW
THE BLOWER IS LOCATED
TOTHE RIGHT OFTHE
BURNER SECTION, AND
AIR CONDiTiONED AiR iS
DISCHARGED TO THE LEFT.
THE BLOWER iS
LOCATED ABOVE THE
BURNER SECTION, AND
CONDiTiONED AIR IS
DISCHARGED DOWNWARD AIRFLOW
THE BLOWER iS
LOCATED BELOW THE
BURNER SECTION, AND
CONDiTiONED AiR iS
DISCHARGED UPWARD.
AIRFLOW
THE BLOWER iS
LOCATED TO THE LEFT
OF THE BURNER SECTION,
AND CONDiTiONED AiR IS
DISCHARGED TO THE RIGHT.
A02097
Fig. 2 - Multipoise Orientations
SUPPLYAIR
MAX80 °F /27°C
32° F/0 ° C MINIMUM INSTALLED
AMBIENT OR FREEZE
PROTECTION REQUIRED
FRONT
RETURN
AIR MIN60°F /16°O
Fig. 3 -Freeze Protection and Return Air Temperature
BACK FRONT
A10490
Fig. 4 -Prohibited Installations
A10494
18-iN. (457.2 mm)
MiNiMUM TO BURNERS
A93044
Fig. 5 - Installation in a Garage

il
AIR FOR COMBUSTION AND
VENTILATION
Introduction
Direct Vent (2-pipe) Applications
When the furnace is installed as a direct vent (2-pipe) furnace, no
special provisions for air for combustion are required. However,
other gas appliances installed in the space with the furnace may
require outside airfor combustion. Follow the guidelines below to
insure thatother gas appliances have sufficient air for combustion.
Non-Direct Vent (1-pipe) Applications
When the furnace is installed as a non-direct vent (l-pipe) furnace,
it will be necessary to insure there is adequate air for combustion.
Other gas appliances installed with the furnace may also require air
for combustion and ventilation in addition to the amount of
combustion air and ventilation air required for the furnace. Follow
the guidelines below to insure that the furnace and other gas
appliances have sufficient air for combustion.
Ventilated Combustion Air Applications
When the furnace is installed using the ventilated combustion air
option, the attic or crawlspace nmst freely communicate with the
outdoor to provide sufficient air for combustion. The combustion
air pipe cannot be terminated in attics or crawlspaces that use
ventilation fans designed to operate during the heating season. If
ventilation fans are present in these areas, the combustion air pipe
nmst terminate outdoors as a Direct Vent/2-Pipe system.
All air for combustion is piped directly to the furnace from a space
that is well ventilated with outdoor air (such as an attic or crawl
space) and the space is well isolated from the living space or
garage. In addition, other gas appliances installed in the space with
the furnace may require outside air for combustion. Follow the
guidelines below to insure that the roof or crawlspace walls have
sufficient free area to provide sufficient air for combustion and
ventilation for the furnaces. The guidelines below can be used to
insure that other gas appliances have sufficient air for combustion.
Provisions for adequate combustion, ventilation, and dilution air
must be provided in accordance with:
• U.S.A. Installations: Section 9.3 of the NFPA 54/ANSI
Z223.1-2009, Air for Combustion and Ventilation and
applicable provisions of the local building codes.
• Canada: Part 8 of the CAN/CSA-B149.1-2010, Venting
Systems and Air Supply for Appliances.
FURNACE CORROSION HAZARD
Failure to follow this caution may result in furnace damage.
Air for combustion nmst 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.
CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in personal
iniury 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 the
Carbon Monoxide Poisoning Hazard warning in the venting
section of these instructions to determine if an adequate
amount of make-up air is availaMe.
The requirements for combustion and ventilation air depend upon
whether or not the furnace is located in a space having avolume of
at least 50 cubic feet per 1,000 Btuh input rating for all gas
appliances installed in the space.
• Spaces having less than 50 cubic feet per 1,000 Btuh (4.8 cubic
meters per kW) require the Outdoor Combustion Air Method.
• Spaces having at least 50 cubic feet per 1,000 Btuh (4.8 cubic
meters per kW) may use the Indoor Combustion Air,
Standard or Known Air Infiltration Method.
Outdoor Combustion Air Method
1. Provide the space with sufficient air for proper combustion,
ventilation, and dilution of flue gases using permanent hori-
zontal or vertical duct(s) or opening(s) directly communicat-
ing with the outdoors or spaces that freely communicate
with the outdoors.
2. Fig. 6 illustrates how to provide TWO OUTDOOR
OPENINGS, one inlet and one outlet combustion and vent-
ilation air opening, to the outdoors.
a. One opening MUST commence within 12 in. (300 ram)
of the ceiling and the second opening MUST commence
within 12 in. (300 ram) of the floor.
b. Size openings and ducts per Fig. 6 and TaMe 3.
c. TWO HORIZONTAL DUCTS require I sq. in. (645 sq.
ram) of free area per 2,000 Btuh (1,100 mm2/kW) of com-
bined input for all gas appliances in the space per Fig. 6and
Table 3.
d. TWO OPENINGS OR VERTICAL DUCTS require 1
sq. in. (645 sq. ram) of free area per 4,000 Btuh (550
mm2/kW) for combined input of all gas appliances in the
space per Fig. 6 and Table 3.
3. ONE OUTDOOR OPENING requires:
a. 1 sq. in. (645 sq. ram) of free area per 3,000 Btuh (734
mm2/kW) for combined input of all gas appliances in the
space per Fig. 6 and Table 3.
b. Not less than the sum of the areas of all vent connectors in
the space.
The opening shall commence within 12 in. (300 ram) of the
ceiling. Appliances in the space shall have clearances of at least 1
in. (25 ram) from the sides and back and 6 in. (150 ram) from the
front. The opening shall directly communicate with the outdoors or
shall conmmnicate through a vertical or horizontal duct to the
outdoors or spaces (crawl or attic) that freely communicate with the
outdoors.
10