Carrier 070-08/024070 Guide

Single-Stage Delu×e
Induced-Combustion
4-W Mlti i F rn
Cancels: II 311A-45-5 II 311A-45-6
4-06
Installation,
Service and Series 120/C
NOTE: Read the entire instruction manual belk)re starling the
installation.
This symbol --> indicates a change since tile last issue.
Start-up, Operating, and
Maintenance Instructions
--> Portions Ill tile lext and t tbles are reprinted fiom NFPA 541ANSI Z223.1-2002©. __
wilh pernfission ol Naliontl Fire Protection Association, Quincy, MA 02269 uld
Amefic u] GIs AssocJ ttJon, W tshhlglon DC 20001. This reprhlled nlalerial is not Ihe
complete and official position ol tile NFPA or ANSI on tile rel_renced subiecl, which !
is represented only by the sland trd in ils entirety.
TABLE OF CONTENTS
SAFETY CONS1OERATIONS .....................................................2
INTRODUCTION .......................................................................... 3
CODES AND STANDARDS ........................................................ 3
Salcty ......................................................................................... 3
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
EFFiCiENCY
CERTIFIED
ISO 9001:2000
ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS
PROCEDURE ................................................................................ 5
LOCATION .................................................................................... 5
General ...................................................................................... 5
Location Relative to Cooling Eqnipment ................................ 7
AIR FOR COMBUSTION AND VENTILATION ...................... 7
INSTALLATION ......................................................................... 1tt
Upflow Installation ................................................................. lit
Bottom Return Air Inlet .................................................... lit
Side Return Air Inlet ......................................................... lit
Leveling Legs (If Desired) ................................................ lit
Downflow Installation ............................................................ 1It
Bottom Return Air Inlet .................................................... 11
Horizontal Installation ............................................................ 12
Suspended Unit Support .................................................... 12
Platlorm Unit Support ....................................................... 12
Roll-Out Protection ............................................................ 12
Bottom Return Air Inlet .................................................... 13
Side Return Air Inlet ......................................................... 13
Filter Arrangement .................................................................. 13
Air Ducts ................................................................................. 13
General Requirements ....................................................... 13
Ductwork Acoustical Treatment ....................................... 13
Supply Air Connections .................................................... 13
Return Air Connections ..................................................... 14
Gas Piping ............................................................................... 17
Electrical Connections ............................................................ 19
115-V Wiring ..................................................................... 19
J-Box Relocation ............................................................... 20
Electrical Connection to J-Box ......................................... 20
BX Cable Installation ........................................................ 21
24-V Wiring ....................................................................... 21
Accessories ........................................................................ 21
Venting .................................................................................... 21
General Venting Requirements ......................................... 23
Masonry Chimney Requirements ...................................... 23
Appliance Application Requirements ............................... 27
Additional Venting Requirements ..................................... 29
Sidewall Venting ............................................................... 29
START-UP, ADJUSTMENT, AND SAFETY CHECK ............ 33
General .................................................................................... 33
Start-Up Procedures ................................................................ 33
Adjustments ............................................................................. 34
Check Salbty Controls ............................................................ 36
Checklist .................................................................................. 37
SERVICE AND MAINTENANCE PROCEDURES .................. 40
Introduction ............................................................................. 40
General ............................................................................... 40
Electrical Controls and Wiring ......................................... 40
Cam and Maintenance ............................................................ 44
Cleaning and/or Replacing Air Filter ............................... 44
Blower Motor and Wheel .................................................. 44
Cleaning Heat Exchanger .................................................. 45
Sequence of Operation ............................................................ 48
Wiring Diagrams ..................................................................... 50
Troubleshooting ...................................................................... 50
Power Cord Installation ..................................................... 21
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
PC 101 Printed in U.S.A. Pg 1 4-06

26-1/8"
(FLUE COLLAR)
5-15/16" ......
7/8" DIA I
ACCESSORY
33-5/16"
11/16"--
-- 25-1/4" --
-- 22-9/16" --
JUNCTION BOXm
LOCATION i;
112" DEATHERMOSTAT ....
WIRE ENTRY _*
3-15116" i_ ........
LEFT HAND GASS
ENTRY
7/8" D[A ACCESSORY_
21-5/8"
BOTTOM FNLET
__ 24 _ __
CASENG
24-7/8"
l
i
i
5-1/2"
_1-11/16"
A
D
LOCATFONS (TYP)
5 PLACES (TYP)
5-1/21'
11/16"
AIRFLOW
OUTLET j
7-3/4"
f
14W/8"
1-1/4"
22-1/16"
SIDEINLET
A04037
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. roundor 14 1/2x 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.
Fig. 1--Dimensional Drawing
SAFETY CONSIDERATIONS
FIRE, EXPLOSION, ELECTRICAL SHOCK, AND
CARBON MONOXIDE POISONING HAZARD
Failure to lk_llow this warning could result in dangerous
operation, serious injury, death, or properly damage.
hnproper installation, adjustment, alteration, service, mainte-
nance, or use could cause carbon monoxide poisnning, explo
sion, fire, electrical shock, or other conditions which may
cause personal injury or property damage. Consult a qualilied
service agency, local gas supplier, or your distributor or
branch lor inlormation or assistance. The qualified service
agency nmst use only factory-authorized and listed kits or
accessnries when modif_¢ing this product.
FURNACE RELIABILITY HAZARD
hnproper 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.
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 perlkmn basic maintenance limctions
such as cleaning and replacing air filters. All other operations nmst
be perlbrmed by trained service personneh When working on
heating equipment, observe precautions in literature, on tags, and
on labels attached to or shipped with furnace and other salety
precautions that may apply.
These instructions cover mininmm requirements and conlorm to
existing national standards and salety codes. In some instances,
these instructions exceed certain local codes and ordinances,
especially those that may not have kept up with changing residen-
tial construction practices. We require these instructions as a
nfininnnu for a safe installation.
CUT HAZARD
Failure to lollow this caution may result in personal injury.
Sheet metal parts may have sharp edges or burrs. Use cam and
wear appropriate protective clothing, sali_ty glasses and
gloves when handling parts and servicing lilrnaces.
Wear salety glasses and work gloves. Have fire extinguisher
available during start-up and adjustment procedures and service
calls.
This is the sali:ty-alert symbol Z_ • When you see this symbol on
the flmmce and in instructions or manuals, be alert to the potential
lk>r personal injury.
Understand the signal words DANGER, WARNING, and CAU-
TION. These words are used with the sali:ty-alert symboh DAN-
GER identifies the most serious hazards which will result in severe
personal injury or death. WARNING signifies a hazard which
could result in personal injury or death. CAUTION is used to
identify hazards which may result in minor personal injury or
product and property damage. NOTE is used to highlight sugges-
tions which will result in enhanced installation, reliability, or
operation.
1. Use only with type of gas approved lk)r this furnace. Reli:r 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 liar Combustion and Ventilation"
section.
4. Combustion products nmst be discharged outdoors. Connect
this furnace to an approved vent system only, as specilied in

Table 1--Dimensions 0N.)
FFILTER
D E C.L. TOP AND FLUE MEDIA
A SUPPLY-AIR RETURN-AIR
FURNACE SiZE CABINET WIDTH WIDTH WIDTH BOTTOM COLLAR* SHIP WT (LB) CABINET
(iN,) (iN,) FLUE COLLAR (iN,) SiZE
(iN.) (iN.)
045-08/024045 14-3/18 12-9/18 12-11/18 9-8/18 4 114 18
045-12/036045 14-3/18 12-9/18 12-11/16 9-8/16 4 117 16
070-08/024070 14-3/18 12-9/18 12-11/18 9-8/18 4 121 18
070-12/036070 14-3/18 12-9/18 12-11/16 9-8/16 4 125 16
070-16/048070 17-1/2 15-7/8 18 11-9/18 4 138 18
090-14/042090 17-1/2 15-7/8 18 11-9/18 4 135 16
090-16/048090 21 19-3/8 19-1/2 13-5/18 4 180 20
090-20/080090 21 19-3/8 19-1/2 13-5/18 4 158 20
110-12/036110 17-1/2 15-7/8 18 11-9/18 4 143 16
110-16/048110 21 19-3/8 19-1/2 13-5/18 4 158 20
110-22/086110 21 19-3/8 19-1/2 13-5/18 4 182 20
135-16/048135 21 19-3/8 19-1/2 13-5/18 4 159 20
135-22/086135 24-1/2 22-7/8 23 18-1/18 4 173 24
155-201060155 24-1/2 22-7/8 23 18-1/18 4 180 24
* 5" or 6" vent connector may be required in some cases.
the "Venting" section of these instructions.
5. Never test liar gas leaks with an open flame. Use a commer-
cially available soap solution made specifically liar the detec-
tion of leaks to check all connections, as specified in the "Gas
Piping" section.
6. Always install lilrnace to operate within the limlace's intended
temperature-rise range with a duct system which has an
external static pressure within the allowable range, as speci-
lied in the "Start-Up, Adjustments, and Salety Check" section.
See furnace rating plate.
7. When a lklrnace is installed so that supply ducts carry air
circulated by the luruace to areas outside the space containing
the luruace, the return air shall also be handled by duct(s)
sealed to the Rirnace casing and terminating outside the space
containing the furnace. See "Air Ducts" section.
8. A gas-fired furnace lor installation in a residential garage nmst
be installed as specified in the warning box in the "Location"
section.
9. The fl]ruace may be used lot construction heat provided that
the fllrnace installation and operation complies with the Ill'st
CAUTION in the LOCATION section of these instructions.
10. These Multipoise Gas-Fired Furnaces are CSA (lbrmerly
A.G.A. and C.G.A.) design-certified ff_r use with natural and
propane gases (see Rirnace rating plate) and liar installation in
alcoves, attics, basements, closets, utility rooms, crawlspaces,
and garages. The Rirnace is factory-shipped liar use with
natural gas. A CSA listed gas conversion kit is required to
convert limmce liar use with propane gas.
11. See Fig. 2 lot required clearances to combustible construction.
12. Maintain a 1-in. clearance from combustible materials to
supply air ductwork lot a distance of 36 inches horizontally
li"om the furnace. See NFPA 90B or local code liar lurther
requirements.
13. These l_.lrnaces SHALL NOT be installed directly on carpet-
ing, tile, or any other combustible material other than wood
flooring. In downflow installations, factory accesso Ufloor
base MUST be used when installed on combustible materials
and wood flooring. Special base is not required when this
lurnace is installed on manulhcturer's Coil Assembly Part No.
CD5 or CK5, or when Coil Box Part No. KCAKC is used. See
Fig. 2 l_}l*clearance to combustible construction inlkmnation.
iNTRODUCTiON
Series 120/C 4 way nmltipoise Category I lau-assisted ll.ll'nace is
CSA design-certified. A Category I lau-assisted furnace is an
appliance equipped with an integral mechanical means to either
draw or lorce products of combustion through the combustion
chamber and/or heat exchanger. The furnace is factou-shipped lot
use with natural gas. This furnace is not approved lor installation
in mobile homes, recreational vehicles, or outdoors.
This l_lrnace is designed l_)r minimum continuous return-air
temperature of 60°F db or intermittent operadou down to 55°F db
such as when used with a night setback daermostat. Return-air
temperature must not exceed 85°F db. Failure to l_fllow these
return-air temperature limits may aflcct reliability of heat exchang-
ers, motors, and controls. (See Fig. 3.)
For accessory installation details, reler to the applicable instruction
literature.
NOTE: Remove all shipping brackets and materials belom oper-
ating the l_rnace.
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 iustalladou must
comply with the national codes listed below and all authorities
having jurisdiction.
In the United States and Canada, fl}llow all codes and standards lot
the l_)llowing:
Step l ISafety
[IS: National Fuel Gas Code (NFGC) NFPA 54 2002/ANSI
Z223.1 2002 and the Installation Standards, Warm Air Heating
and Air Conditioning Systems ANS1/NFPA 90B
CANADA: CSA B149.1-00 National Standard of Canada
Natural Gas and Propane Installation Codes (NSCNGPIC)

INSTALLATION
MINIMUM INCHES CLEARANCE TO COMBUSTIBLE CONSTRUCTION
DISTANCE MINIMALE EN POUCES AUX CONSTRUCTIONS COMBUSTIBLES
This forced air furnace is equipped for use with This furnaceisapprovedforUPFLOW,DOWNFLOW,and
natural gas at altitudes 0-10,000 fi (0-3,050m). HORIZONTALinsta]laiJons.
An accessory kit, supplied by the CettefoumaiseestapprouveepourI 'installationHORIZONTALE
manufacturer, shall be used to convert to propane etla circulationd 'airVERS LEHAUTet VERSLEBAS.
gas use or may be required for some natural gas 1-...'_"b>
applications. Qearancearrows i'_r Lesfl6chesde degagement
This furnace is for indoor installation in a do notchangewith _ _ ! ne changepasavec
tumaceorientation. _ _ I I 'orientationde la foumaise.
building con@'ucted on site.
This furnace may be instatfad on cornbustibfa _ !!
flooring in alcove or closet at minimum clearance
aSmateriaLindicatedby the diagram from combusitbfa X_AR_ _ _._ .U/
Tbls furnace may be used with a Type BH Vent .._-..L,._ERE_.." _ _
and may be vented in common with other gas ._ _. _ _._b
fired appliances. "'_£ _ r"_
Cette fournaise a air pulse est equip6e ?_
pour utilbation avec gaz naturel et altitudes
comprises enb'e 0-3,050m (0H0,000 P0-
Utiliser une trousse de COnversion, fourble par
fa fabdcant, pour passer au gaz propane ou pour
certaines installations au gaz natureL ""
Cette fuurnaise est pr6vue pour eb-e N,_ 8_ V"
fastallee darts un b_timent construit sur place. _ _ _ Clearancein inches
Cette fournaise peut 6b'e instatlee sur _ /Degagement(po).
un plancher combustible dans une alc6ve ou
darts un garde_robe en respectant faminimum
d'espace libre des mat@iaux combustibfas, tel Vent Clearance to combustibles:
qulndique sur fa diagramme. ForSingleWail venis6 inches(6 po).
Cette foumaise peut _tre uti[isee ave(; un ForType B-1venttype 1inch(1po).
Degagement de l'@ent avec combustibles:
conduit d'evacuation de Type Bq ou connectee Pourcondui_d'evacuationa paroisimple6po (6 inches).
au conduit ommun d 'autres appareils a gaz. Pourconduitd'evacuationdeType B:I 1_o(1
MINIMUM INCHES CLEARANCE TO COMBUSTIBLE CONSTRUCTION
DOWNFLOWPOSITIONS:
1- thstallation on non-combusfaible floors only.
For Installation on combestible 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 cfaarance required for alcove.
-k 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.
DF:GAGEMENT MINIMUM EN POUCES AVEC €:LEMENTS
DE CONSTRUCTION COMBUSTIBLES
POURLA POSITIONCOURANTDESCENDANT:
1- Pour l'instatlation sur plancher non combustible seulement.
Pour I1nstallationsur un piancher combustible seulement quand on utilise ta base speciafa, piece
no KGASB0201ALL I'ensembfa serpentin, piece no CD5 ou CK5 ou le carter de serpentin, piece
no KCAKC.
O Dans une alc6ve, on doit maintenir un degagement a Favant de 18 po (450ram).
-k La poistion fadiquee concerne le c6t6 d'entree ou de retour quand lafournaise est dans la
position horizontafa.
Le contact n'est permis qu'enb'e fas tignes formees par fas intersections du dessus et des
deux c6t6s de la cherdse de la fournaise et fas solives, montant sous cadre de charpente.
327590-101 REV. C
Fig. 2--Clearances to Combustibles
A04123

MAX 85°F
FRONT
/J MIN60OF
A02055
Fig. 3iReturn Air Temperature
Step 2iGeneral installation
•US: Current edition of tile NFGC and tile NFPA 9(lB. For
copies, contact the National Fire Protection Association Inc.,
Batterymarch Park, Quincy, MA 02269: (www.NFPA.org) or
%r only the NFGC, contact the American Gas Association, 400
N. Capitol Street, N.W., Washington, DC 2(t(t(tl
(www.AGA.org).
= CANADA: NSCNGP1C. For a copy, contact Standard Sales,
CSA International, 178 Rexdale Boulevard, Etobicoke (Tor-
onto), Ontario, M9W IR3 Canada
Step 3--Combustion and Ventilation Air
•US: Section 8.3 of the NFG(', Air %r Combustion and
Ventilation
•CANADA: Part 7 of NSCNGPIC, Venting Systems and Air
Supply lot Appliances
Step 4--Duct Systems
•[IS and CANADA: Air Conditioning Contractors Association
(ACCA) Manual D, Sheet Metal and Air Conditioning Con-
tractors National Association (SMACNA), or American Soci-
ety of Heating, Reli"igeration, and Air Conditioning Engineers
(ASHRAE) 2001 Fundamentals Handbook Chapter 34 or 2(t(t(t
HVAC Systems and Equipment Handbook Chapters 9 and 16.
Step 5iAcoustical Lining and Fibrous Glass Duct
•{IS and CANADA: current edition of SMACNA and NFPA
9(tB as tested by UL Standard 181 lor Class 1Rigid Air Ducts
Step 6iGas Piping and Gas Pipe Pressure Testing
• US: NFG('; chapters 5, 6, 7, and ]2 and National Plumbing
('odes
•CANADA: NSCNGPIC Parts 3, 4, and 5, and Appendices A,
B, E, and H.
Step 7--Electrical Connections
• US: National Electrical Code (NEC) ANSI/NFPA 70 2002
• CANADA: Canadian Electrical Code CSA C22.1
Step 8--Venting
,{IS: NFGC; chapters l(t and 13
= CANADA: NSCNGPIC Part 7 and Appendix C
ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS
PROCEDURE
FURNACE RELIABILITY HAZARD
hnproper installation or service of furnace may cause prema-
ture furnace component failure.
Electrostatic discharge can affect electronic components.
Follow the Electrostatic Discharge Precautions Procedure
listed below during fln'nace installation and servicing to
protect the furnace electronic controh Precautions will pre-
vent electrostatic discharges fl'om 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 DIS-
CHARGING YOUR BODY'S ELECTROSTATIC CHARGE
TO GROUND.
2. Firmly touch the clean, unpainted, metal surface of the limmce
chassis which is close to the controh Tools held in a person's
band 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 (lbr example; DO
NOT move or shuffle your IL'et, do not touch ungrounded
objects, etc.).
4. If you touch ungrounded objects (and recharge your body with
static electricity), firndy touch a clean, unpainted metal
surlilce of the furnace again betk_retouching control or wires.
5. Use this procedure li)r installed and uninstalled (ungrounded)
lul'naces.
6. Belbm ren-ioving a new control li"om 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
lurnace, lbllow items 1 through 4 belore bringing the control
or yourself in contact with the limmce. Put all used and new
controls into containers belbm touching ungrounded objects.
7. An ESD service kit (available from commercial sources) may
also be used to prevent ESD damage.
LOCATION
GENERAL
This nmltipoise furnace is shipped in packaged configuration.
Some assembly and modifications are required when used in any
of the %ur applications shown in Fig. 4.
This furnace nmst:
be installed so the electrical components are protected from
water.
not be installed directly on any combustible material other than
wood flooring (reli:r to SAFETY CONSIDERATIONS).
be located as close to the chinmey or vent and attached to an air
distribution system. Reler to Air Ducts section.
be provided ample space lor servicing and cleaning. Always
comply with minimum fire protection clearances shown on the
furnace clearance to combustible label.

THE BLOWER IS LOCATED
TOTHE RIGHT OF THE
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.
..........................................._ HORIZO
q ..................................... IAIRFLOW
TBEB OWER,S
LOCATED TO THE LEFT
OF THE BURNER SECTION,
AND CONDITIONED AIR IS
A02097
Fig. 4--Multipoise Orientations
CARBON MONOXIDE POISONING HAZARD
Failure to R)llow this warning cotlld 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 Ikw combustion must not be contaminated by halogen
compounds, which include fluoride, chloride, bromide, and
iodide. These elements can corrode heat exchangers and
shorten lurnace lilk_. Air contaminants are Iimnd in aerosol
sprays, detergents, bleaches, cleaning solvents, salts, air
fresheners, and other household products. Do not install
furnace in a corlTosive or contaminated atmosphere. Make
sure all combustion and circulating air requirements are met,
in addition to all local codes and ordinances.
The Ikfllowing types of furnace installations may require OUT-
DOOR AIR lor combustion due to chemical exposures:
Connnercial buildings
Buildings with indoor pools
Laundry rooms
Hobby or el'all rooms, and
Chemical storage areas
If air is exposed to the lollowing substances, it should not be used
lkwcombustion air, and outdoor air may be required lot conlbus-
tion:
Permanent wave solutions
Chlorinated waxes and cleaners
Chlorine based swinnning pool chemicals
Water soflening chenficals
De-icing salts or chemicals
Carbon tetrachloride
Halogen type refiigerants
Cleaning solvents (such as perchloroethylene)
Printing inks, paint removers, varnishes, etc.
Hydrochloric acid
Cements and glues
Antistatic fabric softeners lot clothes dryers
Masonry acid washing materials
All fuel-burning equipment must be supplied with air lot 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 fi'om the burner area and from dral_ salk:guard
opening.
\\\
18-1N. MINIMUM
TO BURNERS
Fig. 5--installation in a Garage
A93044
FIRE, INJURY OR DEATH HAZARD
Failure to 12)llowthis warning could result in personal injury,
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 inches
above the floor. The Rn'nace 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 NSCNGPIC. (See Fig. 5.)

PERSONAL INJURY AND/OR PROPERTY DAMAGE
HAZARD
hnproper use or installation of this furnace may cause
premature fl]rnace component failure.
This gas lurnace may be used %r heating buildings under
construction provided that:
-The furnace is permanently installed with all electrical
wiring, piping, venting and dncting installed according to
these installation instructions. A return air duct is pa)vided,
sealed to the lm'nace casing, and terminated outside the space
containing the lurnace. 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 lilrnace is controlled by a thermostat. It may not be "hot
wired" to provide heat continuously to the structure without
thermostatic controh
-Clean outside air is provided %r combustion. This is to
minimize the corrosive el'li_ctsof adhesives, sealers and other
construction materials. It also prevents the entrainment of
drywall dust into combustion air, which can cause flmling
and plugging of furnace components.
-The temperature of the return air to the li]rnace 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 interndttent
operation per our installation instructions.
-The air temperature rise is within the rated rise range on the
lurnace 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 nmst be either changed or thoroughly
cleaned prior to occupancy.
-The furnace, ductwork and filters are cleaned as necessary to
remove duwall dust and construction debris li"om all HVAC
system components after construction is completed.
-Verily proper limmce operating conditions including igni-
tion, gas input rate, air temperature rise, and venting accord-
ins to these installation instructions.
FIRE HAZARD
Failure to follow this warning could result in personal injury,
death andk)r property damage.
Do not install the furnace on its back or hang furnace with
control compartment facing downward. Sali_ty control opera-
tion will be adversely afli:cted. Never connect return-air ducts
to the back of the furnace. (See Fig. 6.)
LOCATION RELATIVE TO COOLING EQUIPMENT
The cooling coil n]ust 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 n]ust prevent chilled air li"om entering the
furnace. If the dampers are manually operate& they must be
equipped with means to prevent operation of either unit unless the
damper is in the full-heat or lull-cool position.
BACK
A02054
Fig. 6--Prohibit Installation on Back
AIR FOR COMBUSTION AND VENTILATION
Provisions lot adequate combustion, ventilation, and dilution air
nmst be provided in accordance with:
U.S. installations: Section 8.3 of the NFGC, Air %r Combus-
tion and Ventilation, and applicable provisions of the local
building codes.
Canadian installations: Part 7 of the NSCNGPIC, Venting
Systems and Air Supply lbr Appliances, and all authorities
having jurisdiction.
FURNACE CORROSION HAZARD
Faihn'e to lbllow this caution may result in furnace damage.
Air [or combustion nn]st not be contaminated by halogen
compounds_ which inch]de fluoride, chloride, bromide_ and
iodide. These elements can corl:ode heat exchangers and
shorten furnace lili:. Air contaminants are flmnd in aerosol
sprays, detergents, bleaches, cleaning solvents, salts, air
li"esheners, and other household products.
CARBON MONOXIDE POISONING HAZARD
Faih]re 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 li;rnace.
Make-up air MUST be provided li)r the ventilation devices, in
addition to that required by the fln'nace. Reli:r to Carbon
Monoxide Poisoning Hazard warning in venting section of
these instructions to determine if an adequate amount of
make-up air is available.
The requirements %r combustion and ventilation air depend upon
whether or not the lurnace is located in a space having a volume
of at least 50 cubic licet per 1,000 Btuh input rating lbr all gas
appliances installed in the space.
Spaces having less than 50 cubic li_et per 1,000 Btnh require
the OUTDOOR COMBUSTION AIR METHOD.
Spaces having at least 50 cubic li_etper 1,000 Btuh may use the
INDOOR COMBUSTION AIR, STANDARD or KNOWN-
AIR INFILTRATION METHOD.
Outdoor Combustion Air Method
1. Provide the space with sufficient air %r proper combustion,
ventilation, and dilution of flue gases using permanent hori-
zontal or vertical duct(s) or opening(s) directly comnmnicat-
ins with the outdoors or spaces that freely commmficate with
the outdoors.

Table 2-Minimum Free Area Required for Each Combustion Air Opening or Duct to Outdoors
TWO HORIZONTAL DUCTS SINGLE DUCT OR OPENING TWO OPENINGS OR VERTICAL DUCTS
FURNACE (1 SQ. IN./2,000 BTUH) (1,100 SQ. IvIM/KW) (1 SQ. IN./3,000 BTUH) (734 SQ. MM/KW) (1 SQ. IN./4,000 BTUH) (550 SQ. IvIM/KW)
iNPUT Free Area 01 Free Area 01 Free Area of
(BTUH) Opening and Duct Round Duct Opening and Duct Round Duct Opening and Duct Round Duct
(Sq. In.) (in. Dia) (sq In.) (in. Dia) (Sq In.) (In. Dia)
44,000 22 6 14.7 5 11 4
66,000 33 7 22 6 16.5 5
88,000 44 8 29.3 7 22 6
110,000 55 9 36.7 7 27.5 6
132,000 66 10 44 8 33 7
154,000 77 10 51.3 9 38.5 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
OTHER THAN FAN=ASSiSTED TOTAL FAN-ASSISTED TOTAL
{1,000'S BTUR GAS iNPUT RATE) (1,000'S BTUR GAS iNPUT RATE)
ACH 30 I 40 ! 50 44 ! 66 I 88 I 110 ! 132 I 154
Space Volume (ft3)
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
NP = Not Permitted
2. Fig. 7 illustrates how to provide TWO OUTDOOR OPEN-
INGS, one inlet and one outlet combustion and ventilation air
opening, to the outdoors.
a. One opening MUST commence within 12" (300 ram) of
the ceiling and the second opening MUST colnmence
within 12" (300 rain) of the floor.
b. Size openings and ducts per Fig. 7 and Table 2.
c. TWO HORIZONTAL DUCTS require 1 square inch of
free area per 2,000 Btuh (l,lO0 nnn2/kW) of cembined
input R)r all gas appliances in the space per Fig. 7 and Table
2.
d. TWO OPENINGS OR VERTICAL DUCTS require 1
square inch ol free area per 4,000 Btuh (. 50 mm-/l<W) l_r
combined input of all gas appliances in the space per Fig.
7 and Table 2.
3. ONE OUTDOOR OPENING requires:
a. 1 square inch of free area per 3,000 Bmh (734 elnl2/kW)
liar combined input of all gas appliances in the space per
Table 2 and
b. Not less than the sum of the areas ef all vent connectors in
the space.
The opening shall commence within 12" (300 nnn) of the ceiling.
Appliances in the space shall have clearances of at least l" (25
ram) l_'om the sides and back and 6" (150 nnn) from the l_'ont. The
opening shall directly comnmnicate with the outdoors or shall
communicate thamgh a vertical or horizontal duct to the outdoors
er spaces (crawl or attic) that l]'eely conmmnicate with the
eutdoors.
Indoor Combustion Air{) NFPA & AGA
Standard and Known-Air-Infiltration Rate Methods
Indoor air is permitted R)r combustion, ventilatiom and dilution,
if the Standard or Known-Air-Infiltratlon Method is used.
CARBON MONOXIDE POISONING HAZARD
Failure to lollow this warning could result
in death and/or personal injury.
Many homes require air to be supplied l]'om outdoors lk_r
furnace combustion, ventilation, and dilution of flue gases.
The furnace combustion air supply must be provided in
accordance with this instruction manual.
The Standard Method:
1. The space has no less vohnne than 50 cubic IL'et per l,I)I)I)
Btuh of the maxinmm input ratings lk)r 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).

12"MAX
1SQIN. A
PER 2000 T
BTUH*
[
DUCTS
TO
OUTDOORS
i SQIN.
PER 2000
BTUH* f
CIRCULATING AIR DUCTS
I, ii 12"MAX
DL_C_T_"-- 1SQIN.
TO PER 4000
OUTDOORS BTUH*
*Minimum dimensions of 3 in.
NOTE: Use any of the following
combinations of openings:
A&B C&D D&E F&G A03174
Fig. 7--Air for Combustion, Ventilation, and
Dilution for Outdoors
The Known Air Infiltration Rate Method shall be used, if the
irffiltration rate is known to be:
1. Less than 0.40 ACH and
2. Equal to or greater than 0.10 ACH
Infiltration rates greater dnm 0.60 ACH shall not be used. The
nfinimum required volume of tile space varies with the number of
ACH and shall be detemfined per Table 3 or Equations 1 and 2.
Determine tile minimum required volume %r each appliance in the
space and add the vohnnes together to get the total udnimum
required vohnne %r the space.
Tahle 3-Mininmm Space Volumes were determined by using the
fl}llowing equations fi'nm the National Fuel Gas Code ANSI
Z223.1-2002/NFPA .54-2002,8.3.2.2:
1. For other than fan-asslsted appliances, such as a drali
hood-equipped water heater:
-21ft3_ Iother ._
Volume Oth,_--A---"C-Hp0-0 B'iu/hFJ A04002
2. For fan-assisted appliances such as this furnace:
-- 1 S_t 3 I fan
A04003
CIRCULATING AIR ]_l
DUCTS
I I I I I I
I I I I I I
I I I I I I
INTERIOR
HEATED
SPACE
l
IRCULATING AIR DUCTS
VENT THROUGH ROOF
_< 12" AX
U-z -=--1SQ IN.
PER1000
TUH*,NDOOR
OR WALL
UNCONFINED
! SPACE
6" MIN
(FRONT)t
z_ 1SQIN.
<Lu PER 1000
rr a_ BTUH* IN DOOR
<O __--ORWALL
iii
©
L12" MAX
* Minimum opening size is 100 sq in. with
minimum dimensions of 3 in.
tMinimum of 3 in. when type-B1 vent is used. A03175
Fig. 8--Air for Combustion, Ventilation, and
Dilution from Indoors
l[:
lo,,.. , = combined input ol' all other than fan-assisted appli-
ances in Btu/hr
lh, , = combined input of all fan-assisted appliances in Btu/hr
ACH = air changes per hour (ACH shall not exceed 0.60.)
The %llowing requirements apply to the Standard Method and to
the Known Air Infiltration Rate Method.
I. Adjoining rooms can be considered part of a space if:
a. There are no closable doors between l'ooms.
b. Combining spaces on same floor level. Each opening shall
have fi'ee area of at least 1 in.2/l,000 Btuh (2,000 mme/kW)
of the total input rating of all gas appliances ilk the space,
but net less than 100 in. 2 (0.06 m2). One opening shall
connnence within 12" (300 ram) of the ceiling and the
second opening shall commence within 12" (300 ram) of
the floor. The mininmm dimension of air openings shall be
at least 3 in. (80 ram). (See Fig. 8.)
c. Combining space on dilli:rent floor levels. The volumes of
spaces on difii:rent floor levels shall be considered as
communicating spaces if connected by one or more perma-
nent openings ilk deers or floors having l)'ee area of at least
2 in.2/l,000 Btah (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

BO]qOM FILLER
PANEL
BOTTOM CLOSURE
PANEL
A02098
Fig. 9--Removing Bottom Closure Panel
fi'ee area of at least l-in.2/4,000 Btuh of total input rating lot
all gas appliances in the space.
3. In spaces that use the Indoor Combustion Air Method,
infiltration should be adequate to provide air lor combustion,
permanent ventilation and dilntion of title gases. However, in
buildings with unusually tight constrnctiom additional air
MUST be provided using the methods described in the
Outdoor Combustion Air Method section.
Unusually tight construction is defined as
Construction with:
a. Walls and ceilings exposed to the outdoors have a continu-
ous, sealed vapor barrier. Openings are gasketed or sealed
and
b. Doors and openable windows are weatherstripped and
c. Other openings are caulked or sealed. These include joints
around window and door fi'ames, between sole plates and
floors, between wall-ceiling joints, between wall panels, at
penetrations lor plumbing, electrical and gas lines, etc.
Combination of Indoor and Outdoor Air
1. Indoor openings shall comply with the Indoor Combustion
Air Method below and,
2. Outdoor openings shall be located as required in the Outdoor
Comlmstlon Air Method mentioned previously and,
3. Outdoor openings shall be sized as lollows:
a. Calculate the Ratio of all Indoor Space volume divided by
required volume lot Indoor Combustion Air Method
below.
b. Outdoor opening size reduction Factor is 1 minus the
Ratio in a. above.
c. Minimum size of Outdoor openings shall be the size
required in Outdoor Combustion Air Method above
multiplied by reduction Factor in b. above. The ndnimum
dimension of air openings shall be not less than 3 in. (80
mm).
INSTALLATION
UPFLOW INSTALLATION
Bottom Return Air Inlet
These lurnaces are shipped with bottom closure panel installed in
bottom return-air opening. Remove and discard this panel when
bottom return air is used. To remove bottom closure panel,
perlorm the lollowing:
1. Tilt or raise furnace and remove 2 screws holding bottom filler
panel. (See Fig. 9.)
2. Rotate bottom filler panel downward to release holding tabs.
Fig. 10--Leveling Legs
A89014
10
3. Remove bottom closure panel.
4. Reinstall bottom filler panel and screws.
Side Return Air Inlet
These furnaces are shipped with bottom closure panel installed in
bottom return-air opening. This panel MUST be in place when
only side return air is used.
NOTE: Side return-air openings can be used in UPFLOW and
most HORIZONTAL configurations. Do not use side return-air
openings in DOWNFLOW configuration.
Leveling Legs (If Desired)
In upflow position with side return inlet(s), leveling legs may be
used. (See Fig. 111.) Install field-supplied, 5/16 X l-l/2 in. (max)
corrosion-resistant machine bolts, washers and nuts.
NOTE: Bottom closure must be used when leveling legs are used.
It may be necessary to remove and reinstall bottom closure panel
to install leveling legs. To remove bottom closure panel, see Item
1. in Bottom Return Air Inlet section.
To install leveling legs:
1. Position furnace on its back. Locate and drill a hole in each
bottom corner of furnace. (See Fig. 10.)
2. For each leg, install nut on bolt and then install bolt and nut in
bole. (Install flat washer if desired.)
3. Install another nut on other side of fiwnace base. (Install flat
washer if desired.)
4. Adjust outside nut to provide desired height, and tighten inside
nut to secure arrangement.
5. Reinstall bottom closure panel if removed.
DOWNFLOW INSTALLATION
NOTE: For downflow applications, this fllrnace is approved lor
use on combustible flooring when any one of the fl}llowing 3
accessories are used:
*Special Base, KGASB
* Cased Coil Assembly Part No. CD5 or CK5
° Coil Box Part No. KCAKC
1. Determine application being installed from Table 3.
2. Construct hole in floor per Table 3 and Fig. 11.
3. Construct plenum to dimensions speci/Sed in Table 3 and Fig.
11.

FURNACE
(OR COIL CASING
WHEN USED)
COMBUSTIBLE
FLOORING
SUBBASE
PLENUM
__ FLOOR __
OPENING
• . A96283
Fig. 11iFloor and Plenum Opening Dimensions
Fig. 12iFurnace, Plenum, and Subbase Installed on
a Combustible Floor A96285
FURNACE
CD5 OR CK5
COIL ASSEMBLY
OR KCAKC
COIL BOX
COMBUSTIBLE
FLOORING
SHEET METAL____=._
PLENUM
__ FLOOR
OPENING
A04140
Fig. 13--Furnace, Plenum, and Coil Assembly or Coil
Box Installed on aCombustible Floor
A04140
4. If downflow subbase, KGASB is used, install as shown in Fig.
12. If Coil Assembly Part No. CD5 or CK5 or Coil Box Part
No. KCAKC is used, install as shown in Fig. 13.
NOTE: It is recommended that the perlbrated supply-air duct
flanges be completely fblded over or removed li"om furnace when
installing the fimlace on a factory-supplied cased coil or coil box.
To remove the supply-air duct flange, use wide duct pliers or hand
seamers to bend flange back and lbrth until it breaks off. Be careful
of sharp edges. (See Fig. 14.)
II
Bottom Return Air Inlet
These furnaces are shipped with bottom closure panel installed in
bottom return-air opening. Remove and discard this panel when
bottom return air is used. To remove bottom closure panel,
perlbrm the lollowiug:
1. Tilt or raise furnace and remove 2 screws holding bottom filler
panel. (See Fig. 9.)
2. Rotate bottom filler panel downward to release holding tabs.
3. Remove bottom closure panel.

FURNACE
CASING
WIDTH
TaNe 4--Opening Dimensions 0n.)
APPLICATION C
Upflow Applications on Combustible or Noncombustible
Flooring (KGASB subbase not required) 13-5/16
Downflow Applications on Noncombustible Flooring 13-3/16
(KGASB subbase not required)
14-3/16 Downflow applications on combustible flooring (KGASB 13-7/16
subbase required)
Downflow Applications on Combustible Flooring with CD5 or
CK5 Coil Assembly or KCAKC coil box (KGASB subbase 13-5/16
not required)
Upflow Applications on Combustible or Noncombustible 16-5/8
Flooring (KGASB subbase not required)
Downflow Applications on Noncombustible Flooring 16-1/2
(KGASB subbase not required)
17-1/2 Downflow applications on combustible flooring (KGASB 16-3/4
subbase required)
Downflow Applications on Combustible Flooring with CD5 or
CK5 Coil Assembly or KCAKC coil box (KGASB subbase 16-1/2
not required)
Upflow Applications on Combustible or Noncombustible 20-1/8
Flooring (KGASB subbase not required)
Downflow Applications on Noncombustible Flooring 20
(KGASB subbase not required)
21 Downflow applications on combustible flooring (KGASB 20-1/4
subbase required)
Downflow Applications on Combustible Flooring with CD5 or
CK5 Coil Assembly or KCAKC coil box (KGASB subbase 20
not required)
Upflow Applications on Combustible or Noncombustible 23-5/8
Flooring (KGASB subbase not required)
Downflow Applications on Noncombustible Flooring 23-1/2
(KGASB subbase not required)
24-1/2 Downflow applications on Combustible flooring (KGASB 23-3/4
subbase required)
Downflow Applications on Combustible Flooring with CD5 or
CK5 Coil Assembly or KCAKC coil box (KGASB subbase 23-1/2
not required)
PLENUM OPENING
A B
12-11/16 21-5/8
12-9/16 19
11-13/16 19
12-5/16 19
16 21-5/8
15-7/8 19
15-1/8 19
15-1/2 19
19-1/2 21-5/8
19-3/8 19
18-5/8 19
19 19
23 21-1/8
22-7/8 19
22-1/8 19
22-1/2 19
FLOOR OPENING
D
22-1/4
19-5/8
20-5/8
2O
22-1/4
19-5/8
20-5/8
20
22-1/4
19-5/8
20-5/8
20
22-1/4
19-5/8
20-5/8
20
4. Reinstall bottom filler panel and screws.
HORIZONTAL INSTALLATION
FIRE, EXPLOSION, AND CARBON MONOXIDE
POISONING HAZARD
Failure to lk)llow this walTning could result in personal injury,
death, and/or property damage.
Do not install the furnace on its back or hang lklrnace with
control compamnent facing downward. Sali:ty control opera-
tion will be adversely al_i:cted. Never connect return-air ducts
to the back of the furnace.
The lurnace can be installed horizontally in an attic or crawl space
on either the leli-hand (LH) or right-hand (RH) side. The furnace
can be hung l)'om floor joists, rafters or trusses or installed on a
non-combustible platlkwm, blocks, bricks or pad.
Suspended Furnace Support
The furnace may be supported under each end with threaded rod,
angle iron or metal plumber's strap as shown. (See Fig. 15 and 16.)
Secure angle iron to bottom of furnace as shown. Heavy-gauge
sheet metal straps (plumber's straps) may be used to suspend the
lhrnace li"om each bottom corner. To prevent screws li"om pulling 12
out, use 2 #8 x 3A-in. screws into the side and 2 #8 x 3A-in. screws
in the bottom of the lurnace casing lkw each strap. (See Fig. 15 and
16.)
If the screws arc attached to ONLY the lklrnace sides and not the
bottom, the straps nmst be vertical against the furnace sides and
not pull away fi'om the furnace sides, so thai the strap attachment
screws arc not in tension (are loaded in shear) liar reliable support.
Platliwm Furnace Support
Construct working platform at location where all rcqnired furnace
clearances are met. (See Fig. 2 and 17.) For furnaces with l-in.
clearance requirement on side, set furnace on noncombustible
blocks, bricks or angle iron. For crawl space installations_ if the
furnace is not suspended li"om the floor joists, the ground under-
neath lilrnace mnst be level and the furnace set on blocks or bricks.
Roll-Out Protection
Provide a ndnimum 17-3/4" X 22" piece of sheet metal 1()1"flame
roll-out protection in li"ont of burner area lot lilrllaces closer than
12 inches above the combustible deck or suspended furnaces
closer than 12 inches to joists. The sheet metal MUST extend
underneath the limnace casing by 1 in. with the door removed.
The bottom closure panel on furnaces of widths 17-1/2 in. and
larger may be used liw flame roll-out protection when bottom of
furnace is used li_r return air connection. See Fig. 17 liw proper
orientation of roll-out shield.

PREFERRED
DOW NFLOW
PREFERRED
HORIZONTAL
PREFERRED
\
120_
MIN
I.
PREFERRED 120_
MIN PREFERRED
PERMITTED PERMITTED PERMITTED
Fig. 14--Duct Flanges
A02329
Bottom Return Air Inlet
These lurnaces are shipped with bottom closure panel installed in
bottom return-air opening. Remove and discard this panel when
bott()m return air is used. To remove bottom closurc panel,
perli_rm the fl}llowing:
1. Tilt or raise lurnace and remove 2 screws holding bottom filler
panel. (See Fig. 9.)
2. Rotate bottom filler panel downward to release holding tabs.
3. Remove bottom c]osnrc panel.
4. Reinstall bottom filler panel and screws.
Side Return Air Inlet
These furnaces are shipped with bottom closure panel installed in
bottom return-air opening. This panel MUST be in place when side
return air inlet(s) is used without a bottom return air inlet.
Not all horizontal furnaces are approved lk_r side return air
connections. (See Fig. 20.)
FILTER ARRANGEMENT
CARBON MONOXIDE AND POISONING
HAZARD
Failure to fi)llow this warning could result in personal in.jury,
or death.
Never operaIe a lurnace without a filter or with filter access
door removed.
There are no provisions lot an internal filter rack in these furnaces.
Deluxe furnaces are shipped with a factory supplied Media Filter
Cabinet. The Media Filter Cabinet uses either the factory-supplied
standard l-in. l]lter or a 4 in. wide Media Filter which can be
purchased separately.
Relier to the instructions supplied with Media Cabinet fl_r assembly
and installation options.
AIR DUCTS
General Requirements
The duct system should be designed and sized according to
accepted national standards such as those published by: Air
Conditioning Contractors Association (ACCA), Sheet Metal and
Air Conditioning Contractors National Association (SMACNA) or
American Society of Hearing, RefYigerating and Air Conditioning
Engineers (ASHRAE) or consult The Air ,5).'stenz.sDe.sign G,id_,-
lines rclierence tables available li"om your local distributor. The
duct system should be sized to handle the required system design
CFM at the design external static pressure. The furnace airflow
rates are provided in Table 5-AIR DELIVERY-CFM (With Filter).
When a lk_rnace is installed so that the supply ducts carry air
circulated by the lin'nace 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.
Secure ductwork with proper lasteners lot type of ductwork used.
Seal supply- and return-duct connections to furnace with code
approved tape or duct sealer.
NOTE: Flexible connections should be used between ductwork
and lkn'nace to prevent transmission of vibration. Ductwork pass-
ing through unconditioned space should be insulated and sealed to
enhance system perlbrmance. When air conditioning is used, a
vapor barrier is recommended.
Maintain a 1-in. clearance fi'om combustible materials to supply air
ductwork lot a distance of 36 in. horizontally from the lurnace. See
NFPA 9(tB or local code fl}r further requirements.
Ductwork Acoustical Treatment
NOTE: Metal duct systems that do not have a 90 degree elbow
and lit fl of main duct to the first branch take-off may require
internal acoustical lining. As an alternative, fibrous ductwork may
be used if constructed and installed in accordance with the latest
edition of SMACNA construclion standard on fibrous glass ducts.
Both acoustical lining and fibrous ductwork shall comply with
NFPA 9(tB as tested by UL Standard 181 lor Class 1 Rigid air
ducts.
Supply Air Connections
For a furnace not equipped with a cooling coil, the outlet duct shall
be provided with a removable access panel. This opening shall be
accessible when the limlace is installed and shall be of such a size
that the heat exchanger can be viewed lot possible openings using
light assistance or a probe can be inserted lor sampling the air
stream. The cover attachment shall prevent leaks.
13

I
I
I
I
I
V4" THREADED ROD
4 REQ. J
UTER DOOR
&SSEMBLY
8" MIN FOR DOOR
REMOVAL
¢
SECURE ANGLE
IRON TO BOTTOM
OF FURNACE WITH
3 #8 x 3/4"SCREWS
TYPICAL FOR 2 SUPPORTS
1" SQUARE, 1V4" x 1V4" x %" ANGLE IRON
OR UNI-STRUT MAY BE USED
(2) HEX NUTS, (2) WASHERS & (2) LOCK WASHERS
REQ. PER ROD
A05027
Fig. 15--Horizontal Unit Suspension
[Jpflow and Horizontal Furnaces
Connect supply-air duct to flanges on furnace supply-air outlet.
Bend flange upward to 90°with wide duct pliers. (See Fig. 14.)
The supply-air duct must be connected to ONLY the furnace
supply-outlet-air duct flanges or air conditioning coil easing (when
used). DO NOT cut main furnace casing side to attach supply air
duct, humidifier, or other accessories. All accessories MUST be
connected to duct external to l_lrnaee main casing.
NOTE: For horizontal applications, the top-most flange may be
bent past 90 degrees to allow the evaporator coil to hang on the
flange temporarily while the remaining attachment and sealing of
the coil are perlormed.
Downflow Furnaces
Connect supply-air duct to supply-air outlet on limmce. Bend
flange inward past 90° with wide duct pliers. (See Fig. 14.) The
supply-air duet nmst be connected to ONLY the limmce supply-
outlet or air conditioning coil casing (when used). When installed
on combustible material, supply-air duct must be connected to
ONLY the accessory subbase KGASB0201ALL or a factory
approved air conditioning coil casing. DO NOT cut main furnace
casing to attach supply side air duct, humidifier, or other accesso-
ries. All accessories MUST be connected to duct external to
lhrnace casing.
Return Air Connections
FIRE HAZARD
Failure to lk_llow this warning could cause personal injury
death andk_r property damage.
Never connect return-air duets to the back of the furnace.
Follow instructions below.
Downflow Furnaces
The return-air duct nmst be connected to return-air opening
(bottom inlet) as shown in Fig. 19. DO NOT cut into easing sides
(left or right). Side opening is permitted lbr only upflow and most
horizontal furnaces. (See Fig. 19.) Bypass humidifier connections
should be made at ductwork or coil casing sides exterior to
furnace.
Upflow and Horizontal Furnaces
The return-air duct nmst be connected to bottom, sides (left or
right), or a combination of bottom and side(s) of main furnace
casing as shown in Fig. 18 and 20. Bypass humidifier may be
attached into tmused return air side of the furnace casing. (See Fig.
18 and 20.)
Not all horizontal furnaces are approved %r side return air
connections. (See Fig. 20.)
14

OUTER DOOR
ASSEMB_ X II
II
I1
I!
!1
22 GAUGE GALVANIZED
FOR 4 STRAPS
AIR
BACK QP
FURNACE
METHOD 1
FOLD ALL STRAPS UNDER
FURNACE AND SECURE WTH
(4) #8 x 3/4 SHEET METAL SCREWS
(2 SCREWS IN SIDE AND 2 SCREWS
IN BOTTOM).
METHOD 2
USE (4) #8 x 3/4 SHEET
METAL SCREWS FOR EACH
STRAR THE STRAPS
SHOULD BE VERTICAL
AGAINST THE FURNACE
SIDES AND NOT PULL AWAY
FROM THE FURNACE
SIDES.
Fig. 16--Horizontal Suspension with Straps
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. 17 3/4" OVER ALL
4 3/4" UNDER DOOR
1" UNDER FURNACE
EXTEND OUT 12" OUT
FROM FACE OF DOOR
A03176
30-IN. MIN * WHEN USED WITH
SINGLE WALL VENT
CONNECTIONS
EQUIPMENT
SHUT-OFF GAS VALVE
SEDIMEN] UNION
TRAP
Fig. 17--Typical Attic Installation
A03177
15

Table 5--Air Delivery - CFM (With Filter)*
FURNACE
SIZE
024045
036045
024070
036070
048070
042090
048090
060090
036110
048110
066110
RETURN-AIR
INLET
Bottom
or
Side(s)
Bottom
or
Side(s)
Bottom
or
Side(s)
Bottom
or
Side(s)
Bottom
or
Side(s)
Bottom
or
Side(s)
Bottom
or
Side(s)
Bottom
Only
Both Sides or
1 Side & Bottom
1 Side Only
Bottom
or
Side(s)
Bottom
or
Side(s)
Bottom
Only
Bottom Sides or
1 Side & Bottom
1 Side Only
EXTERNAL STATIC PRESSURE (IN,
SPEED 0.1 0.2 0.3 0.4 0.5 0.6
High 1085 1035 975 915 845 770
Med-High 920 875 830 770 710 840
Med-Low 820 775 730 680 620 555
High 1440 1375 1305 1240 1160 1070
Med-High 1360 1300 1240 1175 1115 1040
Med-Low 1250 1210 1160 1100 1040 985
Low 1085 1055 1035 990 945 885
High 1030 1010 980 945 900 845
Med-High 835 815 790 780 720 675
Med-Low 725 700 875 645 800 555
High 1425 1375 1320 1265 1200 1125
Med-High 1320 1280 1240 1205 1140 1075
Med-Low 120 1175 1145 1105 1050 990
Low 1040 1030 1010 985 945 895
High 1808 1740 1670 1600 1530 1445
Med-High 1630 1585 1530 1470 1405 1330
Med-Low 1460 1420 1385 1325 1280 1220
Low 1275 1250 1225 1195 1155 1105
High 1650 1600 1535 1465 1385 1285
Med-High 1515 1485 1440 1380 1300 1220
Med-Low 1385 1360 1320 1260 1195 1120
Low 1205 1180 1160 1120 1085 1005
High 2060 1985 1915 1820 1720 1610
Med-High 1790 1765 1715 1645 1560 1470
Med-Low 1505 1505 1480 1440 1375 1300
Low 1225 1225 1220 1195 1155 1085
High 2405 2310 2220 2130 2025 1920
Med-High 2225 2155 2080 1995 1895 1785
Med-Low 2020 1955 1880 1805 1730 1630
Low 1810 1765 1715 1645 1565 1480
High 2530 2450 2385 2270 2185 2065
Med-High 2285 2215 2150 2075 1985 1890
Med-Low 1995 1945 1900 1840 1770 1685
Low 1770 1740 1700 1645 1575 1505
High 2475 2395 2300 2200 2090 1985
Med-High 2260 2190 2110 2035 1940 1845
Med-Low 1950 1910 1855 1795 1730 1650
Low 1730 1695 1650 1600 1535 1470
High 1625 1575 1515 1445 1355 1260
Med-High 1510 1470 1415 1355 1285 1185
Med-Low 1360 1335 1295 1250 1180 1100
Low 1195 1180 1155 1115 1085 980
High 2035 1965 1880 1790 1680 1495
Med-High 1745 1710 1650 1560 1450 1340
Med-Low 1530 1515 1470 1400 1310 1215
Low 1270 1265 1235 1195 1130 1055
High 2530 2470 2400 2320 2220 2115
Med-High 2230 2205 2165 2110 2035 1950
Med-Low 1920 1900 1880 1845 1795 1730
Low 1640 1650 1635 1610 1575 1520
High .... 2415 2350 2250 2145
Med-High 2235 2200 2155 2100 2040 1955
High 2540 2495 2430 2355 2285 2175
Med-High 2125 2120 2105 2060 2010 1940
*A filter is required for each return-air inlet. Airflow performance included 1-in. washable filter media such as contained
determine airflow performance without this filter, assume an additional 0.1 in. wc available external static pressure.
-- Indicates unstable operating conditions.
wc)
0.7 0.8 0.9 1.0
675 565 390 195
555 440 250 --
470 380 190 --
975 870 730 580
950 850 725 575
885 790 870 520
810 715 595 435
775 680 490 335
610 490 375 265
475 390 300 --
1035 940 830 655
995 905 790 620
920 840 725 555
845 765 655 505
1360 1280 1180 1075
1255 1170 1080 990
1155 1080 995 910
1050 980 910 835
1175 1055 895 645
1115 990 830 600
1025 915 710 565
925 810 830 510
1490 1340 1135 925
1345 1195 1010 820
1190 1045 890 740
985 870 735 620
1790 1860 1530 1350
1675 1565 1420 1260
1535 1420 1275 1135
1390 1280 1145 1005
1940 1805 1670 1505
1780 1860 1525 1360
1600 1480 1350 1180
1415 1325 1190 1040
1865 1730 1585 1425
1735 1820 1475 1325
1555 1445 1310 1150
1385 1285 1165 1000
1165 990 785 595
1070 890 725 530
985 810 670 475
860 740 805 410
1365 1215 1075 875
1205 1090 955 750
1095 990 830 670
970 875 720 600
2000 1865 1730 1590
1855 1740 1615 1485
1650 1555 1460 1340
1455 1375 1285 1170
2015 1875 1715 1560
1850 1740 1595 1470
2065 1935 1785 1650
1840 1730 1615 1485
in factory-authorized accessory filter rack. To
16

Table 5--Air Delivery -CFM (With Filter)* (Continued)
FURNACE
SIZE
048135
066135
060155
RETURN-AIR
iNLET
Bottom
or
Side(s)
Bottom
Only
Bottom, Sides or
1 Side & Bottom
1 Side Only
Bottom
Only
Both Sides Or
1 Side & Bottom
1 Side Only
SPEED EXTERNAL STATIC PRESSURE (IN, we)
0.1 0.2 0.3 0.4 0.8 0.8 0.7 0.8 0.9 1.0
High 2090 2010 1930 1835 1710 1590 1470 1335 1025 835
Med-High 1790 1755 1705 1640 1550 1465 1360 1210 945 785
Med-Low 1545 1525 1500 1450 1380 1315 1215 1005 855 670
Low 1325 1320 1295 1285 1210 1150 995 865 745 540
High 2485 2400 2310 2215 2110 2000 1880 1725 1535 1355
Med-High 2195 2150 2090 2000 1920 1825 1720 1565 1405 1255
Med-Low 1880 1850 1820 1780 1715 1835 1540 1415 1290 1160
Low 1640 1635 1615 1585 1530 1465 1370 1255 1150 1040
High .... 2385 2305 2195 2085 1960 1825 1670 1465
Med-High 2180 2145 2060 2010 1945 1865 1765 1660 1515 1325
High .... 2245 2155 2055 1940 1825 1695 1555 1385
Med-High 2135 2085 2035 1975 1895 1795 1685 1565 1445 1265
High 2465 2430 2375 2305 2230 2110 2000 1865 1725 1545
Med-High 2115 2105 2075 2030 1980 1910 1830 1725 1590 1425
Med-Low 1800 1790 1770 1735 1695 1640 1570 1465 1345 1225
Low 1570 1565 1550 1525 1495 1445 1370 1270 1175 1070
High .... 2375 2285 2200 2105 1995 1870 1730 1570
Med-High 2155 2135 2095 2040 1975 1895 1790 1685 1550 1400
High .... 2260 2180 2085 1975 1865 1740 1605 1455
Med-High 2140 2095 2040 1975 1890 1810 1705 1595 1480 1325
*A filter is required for each return-air inlet. Airflow performance included 1-in. washable filter media such as contained in factory-authorized accessory filter rack. To
determine airflow performance without this filter, assume an additional 0.1 in. wc available external static pressure.
Indicates unstable operating conditions.
GAS PIPING
t , =
FIRE OR EXPLOSION HAZARD
Failure to Iollow this warning could result in personal injury,
death, and/or property damage.
Never purge a gas line into a combustion chamber. Never test
lbr gas leaks with an open flame. Use a commercially
available soap solution made specil]cally liar the detection of
leaks to check all connections.
FIRE OR EXPLOSION HAZARD
Failure to Iollow this warning coud result in personal injury,
death, andk_r property damage.
Use proper length of pipe to avoid stress on gas control
manili_dd and a gas leak.
Gas piping must be installed in accordance with national and local
codes. Rel;,:'rto current edition of NFGC in the U.S., the NSCNG-
P1C in Canada.
Installations must be made in accordance with all authorities
having jurisdiction. If possible, the gas supply line should be a
separate line running directly l)'om meter to lurnace.
NOTE: In the state of Massachusetts:
1. Gas supply connections MUST be perlormed by a licensed
plumber or gas fitter.
2. When flexible connectors are used, the maxiumm length
shall not exceed 36 inches (915 ram).
3. When lever handle type manual equipment shutoff valves am
used, they shall be T-handle valves.
4. The use of copper robing liar gas piping is NOT approved by
the state of Massachusetts.
Reli:r to Table 6 for recommended gas pipe sizing. Risers lnnst be
used to connect to furnace and to meter. Support all gas piping
with appropriate straps, hangers, etc. Use a minimum of 1 hanger
every 6 fl. Joint compound (pipe dope) should be applied sparingly
and only to male threads of joints. Pipe dope must be resistant to
the action of propane gas.
17
FIRE OR EXPLOSION HAZARD
Failure to 12_llowdais warning could result in personal injury,
death, and/or property damage.
If local codes allow the use of a flexible gas appliance
connector, always use a new listed connector. Do not use a
connector which has previously served another gas appliance.
Black iron pipe shall be installed at the limlace gas control
valve and extend a minimnm of 2 in. outside the l_lrnace.
FURNACE OVERHEAT HAZARD
Failure to lollow this caution may result in property damage.
Connect gas pipe to gas valve using a backup wrench to avoid
damaging gas controls and burner misalignment.
An accessible manual equipment shutoff' valve MUST be installed
external to lilrnace casing and within 6 fl of furnace. A l/8-in. NPT
plugged tapping, accessible lkn"test gauge connection, MUST be
installed immediately upstream of gas supply connection to
furnace and downstream of manual equipment shutoff valve.
NOTI=: The furnace gas control valve inlet pressure tap connec-
tion is suitable to use as test gauge connection providing test
pressure DOES NOT exceed maximum 0.5 psig (14-in. we) stated
on gas control valve. (See Fig. 52.)
Some installations require gas entry on right side of furnace (as
viewed in upflow.) (See Fig. 21a.)
Install a sediment trap in riser leading to li_rnace as shown in Fig
21b. Connect a capped nipple into lower end of tee. Capped nipple
should extend below level of furnace gas controls. Place a ground
.joint union between furnace gas control valve and exterior manual
equipment gas shutoff valve. A l/8-in. NPT plugged tapping,
accessible liar test gauge connection, MUST be installed immedi-
ately upstream of gas supply connection to lurnace and down-
stream of manual equipment shutoff valve.

['_ UPFLOW RETURN AIR CONFIGURATIONS AND RESTRICTIONS
AIR FLOW MODELS RETURN AIR RETURN AmR RETURN AIR
CONNECTION t CONNECTION 2 CONNECTmON 3
ONLY ONLY ONLY
066.060, -22 AND YES YES YES
-20 MODELS
ALL OTHER MODELS YES YES YES YES
UP,LOW
HESTHIcrloNS
Fig. 18--Upflow Return Air Configurations and Restrictions
RETURN AIR
COMBINATmQNS
OF 1,2, AND3
YES
A02075
DOWNFLOWRETURNAIRCONF1GURATIONSANDRESTRICTIONS
_J _ t AIR FLOW MODELS RETURN AIR RETURN AIR
CONNECTION 1 CONNECTION 2
ONLY ONLY
066.060, -22 AND YES NO
-20 MODELS
ALL OTHER MODELS YES NO NO
suPPLY
AIR
RETURN AIR RETURN AIR
CONNECTION 3 COMBINATIONS
ONLY OF 1, 2, AND 3
NO NO
NO
Fig. 19--Downflow Return Air Configurations and Restrictions A02163
RETURN
AIRFtOWMODELSi
...........................................J IIII li .....
o2IIII " _
.... _ IIII
"z_#'"{ IIII
j\. orP RMIrr_r?FORi
066,C'_0,-22-0
i AIRF_OWMODELS
.............../' ii
RE_'URN AIR
_[ORIZOAL*NOTE RESTRICTIONLEFTSAM£ [Q£ _ AIR Rf S[[_IC[IO S
@ | HORIZONTAL RETURN AIR CONFIGURATIONS AND RESTRICTIONS
AIR FLOW MODELS RETURN AIR RETURN AIR RETURN AIR RETURN AIR
CONNECTION 1 CONNECTION 2 CONNECTION 3 COMBINATIONS
ONLY ONLY ONLY OF 1, 2, AND 3
066.060, -22 AND YES NO NO NO
-20 MODELS
ALL OTHER MODELS YES YES YES YES
Fig. 20--Horizontal Return Air Configurations and Restrictions
18
A02162

Table 6iMa×imum Capacity of Pipe*
NOMINAL
IRON
PiPE
SiZE
(iN.)
1/2
3/4
1
1-1/4
1-1/2
iNTERNAL
DIAMETER
(iN.)
0.822
0.824
1.049
1.380
1.810
LENGTH OF PIPE (FT)
10 20 30 40 80
175 120 97 82 73
380 250 200 170 181
680 465 378 320 285
1400 950 770 860 580
2100 1460 1180 990 900
* Cubic ft of natural gas per hr for gas pressures of 0.5 psig (14-in. wc) or less
and a pressure drop of 0.5-in wc (based on a 0.60 specific gravity gas).
Ref: Table 12.2 ANSI Z223-2002/NFPA 54-2002.
TOP VIEW OF BURNER AND MANIFOLD ASSEMBLY
J
90° Elbow_
2" Nipple
90 ° Elbow
Close Nipple L Gas Valve
Fig. 21aiBurner and Manifold
Supply
A05028
The gas supply pressure shall be within tile maxiumu_ and
minimun_ inlet snpply pressures marked on the rating plate with
the lurnace burners ON and OFF.
ELECTRICAL CONNECTIONS
ELECTRICAL SHOCK HAZARD
Failure to lollow this warning could result in personal injury
or death.
Blower access panel door switch opens l15-v power to
control. No component operation can occur. Do not bypass or
close switch with panel removed.
See Fig. 25 lor field wiring diagl'am showing typical field 115-v
wiring. Check all factory and field electrical connections liar
tightness.
Field-supplied wiring shall conlbrm with the limitations of 63°F
(33°C) rise.
ELECTRICAL SHOCK AND FIRE HAZARD
Failure to lk>llow this warning could result in personal injury,
death, or properly damage.
The cabinet MUST have an uninterrupted or unbroken ground
according to NEC ANSI/NFPA 70-2002 and Canadian Elec-
trical Code CSA C22.1 or local codes to ndnimize personal
injury if an electrical fault should occur. This may consist of
electrical wire, conduit approved lbr electrical ground or a
listed, grounded power cord (where permitted by local code)
when installed in accordance with existing electrical codes.
Relier to the power cord manufucmrer's ratings for proper
wire gauge. Do not use gas piping as an electrical ground.
SUPPLY j_
MANUAL_/
SHUTOFF J_
VALVE
(REQUIRED/f& J_
SEDIMENT-- t
TRAP /
UNION"J
A02035
Fig. 21 b--Typical Gas Pipe Arrangement
Piping should be pressure and leak tested in accordance with
NFGC in the United States or NSCNGPIC in Canada, local, and
national plumbing and gas codes beik_re the furnace has been
connected. After all connections have been made, purge lines and
check liar leakage at furnace prior to operating furnace.
If pressure exceeds 0.5 psig (14-in. wc), gas supply pipe must be
disconnected from lisrnace and capped belbre and during supply
pipe pressure test. If test pressure is equal to or less than 0.5 psig
(14-in. we), turn off electric shutolT switch located on furnace gas
control valve and accessible manual equipment shutolT valve
belbrc and during supply pipe pressure test. Alter all connections
have been made, purge lines and check liar leakage at furnace prior
to operating lurnace.
FIURNACE MAY NOT OPERATE
Failure to lk_llow this caution may result in intermitent
flmmce operation.
Furnace control nmst be grounded lbr proper operation or else
control will lock out. Control ulust remain grounded through
green/yellow wire routed to gas valve and mani{k_ld bracket
screw.
15-V WIRING
Verily that the voltage, fi'equency, and phase correspond to that
specified on unit rating plate. Also, check to be sure that service
provided by utility is sulTicient to handle load imposed by this
equipment. Refer to rating plate or Table 7 lk_r equipment electrical
specifications.
U.S. installations: Make all electrical connections in accordance
with National Electrical Code (NEC) ANS1/NFPA 70-2002 and
any local codes or ordinances that might apply.
Canadian installations: Make all electrical connections in accor-
dance with Canadian Electrical Code CSA C22.1 or authorities
having ,jurisdiction.
FIRE HAZARD
Failure to lk>llow this warning could result in personal injury,
death, or property damage.
Do not connect aluminum wire between disconnect switch
and lurnace. Use only copper wire.
Use a separate, fused branch electrical circuit with a properly sized
fuse or circuit breaker liar this lurnace. See Table 7 lk_r wire size
19

OPERATING
FURNACE SIZE VOLTAGE RANGE
Maximum* Minimum*
045-08/024045 127 104
045-12/036045 127 104
070-08/024070 127 104
070-12/036070 127 104
070-16/048070 127 104
090-14/042090 127 104
090-16/048090 127 104
090-20/060090 127 104
110-12/036110 127 104
110-16/048110 127 104
110-22/066110 127 104
135-16/048135 127 104
135-22/066135 127 104
155-20/060155 127 104
* Permissible limits of the voltage range at which the unit
VOLTS-
HERTZ-
PHASE
118-60-1
115-60-1
118-60-1
115-60-1
118-60-1
115-60-1
118-60-1
115-60-1
118-60-1
115-60-1
118-60-1
115-60-1
118-60-1
115-60-1
Table 7--Electrical Data
5.4
7.0
5.0
6.8
9.5
8.2
10.0
13.6
8.2
10.1
14.8
10.2
14.4
15.0
operates satisfactorily•
UNIT
AMPACffY# MINIMUM WiRE GAUGE
MAXIMUM
WiRE LENGTH (FT)$
48
39
52
40
28
34
28
32
34
28
30
27
30
28
MAXIMUM
FUSE OR CKT BKR
AMPSt
15
15
15
15
15
15
15
2O
15
15
2O
15
2O
2O
7.54 14
9.50 14
7.06 14
9.22 14
12.60 14
10.83 14
13.13 14
17.61 12
10.75 14
13.12 14
18.89 12
13.27 14
18.55 12
18.33 12
# Unit ampacity = 125 percent of largest operating component's full load amps plus 100 percent of all other potential operating components' (EAC, humidifier, etc.) full load
amps.
1 Time-delay type is recommended•
Length shown is as measured 1 way along wire path between unit and service panel for maximum 2 percent voltage drop.
and fl_se specifications. A readily accessible means of electrical
disconnect must be located within sight of the liJrnace.
NOTE: Proper polarity must be maintained %r l15-v wiring. If
polarity is incorrect, control LED status indicator light will flash
rapidly and furnace will NOT operate.
J-BOX RELOCATION
NOTE: If factory location of J-Box is acceptable, go to next
section (ELECTRICAL CONNECTION TO J-BOX).
NOTE: On 14" wide casing models, the J-Box shall not be
relocated to other side of furnace casing when the vent pipe is
routed within the casing.
1. Remove and save two screws holding J-Box. (See Fig. 22.)
NOTE: The J-Box cover need not be removed fl'om the J-Box in
order to move the J-Box. Do NOT remove green ground screw
inside J-Box. The ground screw is not threaded into the casing
flange and can be lifted out of the clearance hole in casing while
swinging the front edge of the J-Box outboard of the casing.
2. Cut wire tie on loop in furnace wires attached to J-box.
3. Move J-Box to desired location.
4. Fasten J-Box to casing with two screws removed in Step 1.
5. Route J-Box wires within furnace away fl'om sharp edges,
rotating parts and hot surfaces.
ELECTRICAL CONNECTION TO J-BOX
Field-Supplied Electrical Box on Furnace J-Box Bracket
See Fig. 23.
1. Remove cover from furnace J-Box.
2. Attach electrical box to flmmce J-Box bracket with at least
two field-supplied screws through holes in electrical box into
holes in bracket. Use bhmt-nose screws that will not pierce
wire insulation.
3. Route fln'nace power wires through holes in electrical box and
J-Box brackeL and make field-wire connections in electrical
box. Use best practices (NEC in U.S. and CSA C22.1 in
Canada) lor wire bushings, strain relief, etc.
4. Route and secure field ground wire to green ground screw on
J-Box bracket.
FACTORY
INSTALLED
LOCATION
fJ
Fig. 22--Relocating J-Box
TWO
;7 ALTERNATE
FIELD
LOCATION
A02099
2O
5. Connect line voltage leads as shown in Fig. 25.
6. Reinstall cover to J-Box. Do not pinch wires between cover
and bracket.
Electrical Box on Furnace Casing Side
See Fig. 23.
FIRE OR ELECTRICAL SHOCK HAZARD
Failure to %llow this warning could resuh in personal injury,
death, or property damage.
If lield-supplied manual disconnect switch is to be mounted
on liarnace casing side, select a location where a drill or
fastener cannot damage electrical or gas components.
1. Select and remove a hole knockout in the casing where the
electrical box is to be installed.
NOTE: Check that duct on side of furnace will not interfere with
installed electrical box.
2. Remove the desired electrical box hole knockout and position
the hole in the electrical box over the hole in the furnace
casing.