AHRI (-)98VA060M317USA User manual

INSTALLATION INSTRUCTIONS
OR UP LOW CONDENSING MODULATING,
COMMUNICATING GAS URNACES W/ECM BLOWER
(-)98V SERIES
CARBON-MONOXIDE POISONING HAZARD
FAILURE TO FOLLOW INSTRUCTIONS COULD RESULT IN SEVERE
PERSONAL INJURY OR DEATH DUE TO CARBON-MONOXIDE
POISONING, IF COMBUSTION PRODUCTS INFILTRATE INTO THE
BUILDING.
CHECK THAT ALL OPENINGS IN THE OUTSIDE WALL AROUND THE
VENT (AND AIR INTAKE) PIPE(S) ARE SEALED TO PREVENT
INFILTRATION OF COMBUSTION PRODUCTS INTO THE BUILDING.
CHECK THAT FURNACE VENT (AND AIR INTAKE) TERMINAL(S) ARE
NOT OBSTRUCTED IN ANY WAY DURING ALL SEASONS.
THESE INSTRUCTIONS ARE INTENDED AS AN AID TO QUALIFIED
SERVICE PERSONNEL FOR PROPER INSTALLATION, ADJUSTMENT
AND OPERATION OF THIS UNIT. READ THESE INSTRUCTIONS
THOROUGHLY BEFORE ATTEMPTING INSTALLATION OR OPERATION.
FAILURE TO FOLLOW THESE INSTRUCTIONS MAY RESULT IN
IMPROPER INSTALLATION, ADJUSTMENT, SERVICE OR
MAINTENANCE, POSSIBLY RESULTING IN FIRE, ELECTRICAL SHOCK,
CARBON MONOXIDE POISONING, EXPLOSION, PROPERTY DAMAGE,
PERSONAL INJURY OR DEATH.
IF THE INFORMATION IN THESE INSTRUCTIONS IS NOT FOLLOWED
EXACTLY, A FIRE OR EXPLOSION MAY RESULT CAUSING PROPERTY
DAMAGE, PERSONAL INJURY OR DEATH.
PROPOSITION 65 WARNING: THIS PRODUCT CONTAINS CHEMICALS
KNOWN TO THE STATE OF CALIFORNIA TO CAUSE CANCER, BIRTH
DEFECTS OR OTHER REPRODUCTIVE HARM.
— Do not store or use gasoline or other flammable vapors and liquids, or other combustible
materials in the vicinity of this or any other appliance.
— WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any phone in your building.
• Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s
instructions.
• If you cannot reach your gas supplier, call the fire department.
• Do not return to your home until authorized by the gas supplier or fire department.
— DO NOT RELY ON SMELL ALONE TO DETECT LEAKS. DUE TO VARIOUS FACTORS,
YOU MAY NOT BE ABLE TO SMELL FUEL GASES.
• U.L. and/or C.S.A. recognized fuel gas and CO (carbon monoxide) detectors are rec-
ommended in all applications, and their installation should be in accordance with the
manufacturer’s recommendations and/or local laws, rules, regulations, or customs.
— Improper installation, adjustment, alteration, service or maintenance can cause injury
property damage or death. Refer to this manual. Installation and service must be
performed by a qualified installer, service agency or the gas supplier. In the
commonwealth of Massachusetts, installation must be performed by a licensed plumber
or gas fitter for appropriate fuel.
92-24161-159-01

2
Con en s
TABLE O CONTENTS
1 TABLE O CONTENTS . . . . . . . . . . . . . . . . . . . . . . 2
2 GENERAL IN ORMATION . . . . . . . . . . . . . . . . . . . . 3
Receiving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
California Proposition 65 Note . . . . . . . . . . . . . . . . . . 4
Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3 SA ETY IN ORMATION. . . . . . . . . . . . . . . . . . . . . . 6
Warnings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Important Information About Efficiency and Quality. . 7
Commonwealth of Massachusetts Note . . . . . . . . . . 8
4 LOCATION REQUIREMENTS . . . . . . . . . . . . . . . . . 9
Freeze Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Site Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Clearance Accessibility. . . . . . . . . . . . . . . . . . . . . . . 10
Clearance Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5 IELD CONVERSIONS . . . . . . . . . . . . . . . . . . . 12-18
General Conversion Instructions and Tips. . . . . . . . 12
Lists of Materials for Parts ag and
Conversion Kits. . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Conversion Table of Contents . . . . . . . . . . . . . . . . . 14
Upflow with Vertical Vent. . . . . . . . . . . . . . . . . . . 15-16
Upflow with Left Side Vent . . . . . . . . . . . . . . . . . 17-18
6 DUCTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
7 VENTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
General Venting Requirements and Guidelines
(All Instructions) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Venting and Combustion Air Piping
Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Piping Requirements . . . . . . . . . . . . . . . . . . . . . . 23
Vent Pipe Sizing and Maximum Lengths . . . . . . . 25
Equivalent Vent Length. . . . . . . . . . . . . . . . . . . . . 25
Polypropylene Vent Products . . . . . . . . . . . . . . . . 27
Termination Requirements . . . . . . . . . . . . . . . . . . 28
Non-Direct Venting. . . . . . . . . . . . . . . . . . . . . . . . . 29
Furnace Located in an Unconfined Space. . . . . . 29
Furnace Located in a Confined Space. . . . . . . . . 29
Non-Direct Venting Terminations . . . . . . . . . . . . . 32
Direct Venting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Option 1: Standard Vertical Direct Vent
Termination . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Option 2: Standard Horizontal Direct Vent
Termination . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Option 3: Variant of Standard Horizontal
Direct Vent Termination. . . . . . . . . . . . . . . . . . . 35
Option 4: Alternate Horizontal Direct Vent
Termination . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Option 5: Variant of Alternate Horizontal
Direct Vent Termination. . . . . . . . . . . . . . . . . . . 36
Optional Termination Angles for Alt.
Horizontal and Variant of Alt. Horizontal
Direct-Vent Terminations (Options 4 and 5) . . . 37
Option 6 & 7: Vertical and Horizontal
Concentric Vent Termination (RXGY-E02A and
RXGY-E03A) . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Options 8 & 9: Sidewall Vent Kit for Direct Vent
Termination (RXGY-G02 & RXGY-G01). . . . . . 39
Direct Venting Termination Clearances . . . . . . . . 40
Multiventing of Direct Vent Furnaces . . . . . . . . . . 41
8 CONDENSATE DRAIN AND DRAIN
NEUTRALIZER . . . . . . . . . . . . . . . . . . . . . . . . . . 42
9 GAS SUPPLY AND PIPING
Gas Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Gas Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Gas Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Gas Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
10 LP CONVERSION . . . . . . . . . . . . . . . . . . . . . . . . . . 47
11 URNACE ADJUSTMENTS . . . . . . . . . . . . . . . . . . 50
Orifice Selection/Altitude Adjustment. . . . . . . . . . . . 50
Adjust The Gas Pressure . . . . . . . . . . . . . . . . . . . . . 51
Verify The Input Rate . . . . . . . . . . . . . . . . . . . . . . . . 54
Adjust The Gas Heat Temperature Rise . . . . . . . . . 55
Temperature Rise Verification . . . . . . . . . . . . . . . . . 56
12 ELECTRICAL WIRING . . . . . . . . . . . . . . . . . . . . . . 58
Reversing the Electrical Connection . . . . . . . . . . . . 58
Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
13 ACCESSORIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Electronic Air Cleaner. . . . . . . . . . . . . . . . . . . . . . . . 60
Humidifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Twinning (Not Permitted) . . . . . . . . . . . . . . . . . . . . . 60
Air Temperature Sensors . . . . . . . . . . . . . . . . . . . . . 60
14 CALIBRATION SEQUENCE O OPERATIONS . . 62
15 START-UP AND SEQUENCE O OPERATIONS . 63
16 INTEGRATED URNACE CONTROL . . . . . . . . . . 68
Humidification/Dehumidification. . . . . . . . . . . . . . . . 68
Dipswitches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Dual 7-Segment Display . . . . . . . . . . . . . . . . . . . . . 73
Pushbutton . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Supply & Outdoor Air Temp Sensors . . . . . . . . . . . . 76
Auxiliary Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Thermostat Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Thermostat Wiring Diagrams-Communicating . . . . 79
Non-Communicating . . . . . . . . . . . . . . . . . . . . . . 80
17 TIMING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . 86
18 MAINTENANCE. . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
System Operation Information . . . . . . . . . . . . . . . . . 89
Annual Inspection. . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Replacement Parts. . . . . . . . . . . . . . . . . . . . . . . . . . 89
19 DIAGNOSTICS AND TROUBLESHOOTING. . . . . 90
Normal Operation Codes . . . . . . . . . . . . . . . . . . . . . 90
Fault Codes with Descriptions and Solutions. . 91-100
Lockout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
Replacing the Furnace Control . . . . . . . . . . . . . . . 101
Diagnosing lower Motor Issues . . . . . . . . . . . . . . 102
Wiring Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . 104

General Informa ion
GENERAL IN ORMATION
10
1
11
12
13
14
16
24
7
8
9
23
6A
5
2
4
3
22
25
20
21
19
18
5
17
15
26
6B
6C
ITEM
NO. DESCRIPTION
1. CONDENSATE TRAP
2. DOOR SWITCH
3. JUNCTION OX
4. TRANSFORMER
5. WATER SENSOR (2)
6. PRESSURE SWITCH STAGES
A. HIGH
. MEDIUM
C. LOW
7. EXHAUST TRANSITION
8. COUPLING (EL OW TO TRANSITION)
9. EXHAUST
10. SHIPPING PLUG
11. FLAME SENSOR
12. OVER TEMPERATURE SWITCH
13. TOP PLATE
14. URNER
15. IGNITER
16. COM USTION AIR INLET
17. GAS VALVE
18. INDUCED DRAFT LOWER (ID )
19. POWER FACTOR CORRECTION CHOKE
(PFC) (NOT USED ON THE 60K TU
AND 70K TU)
20. CONTROL MOUNTING PLATE
21. LOWER
22. LOW VOLTAGE TERMINAL
23. COUPLING (ID TO EL OW)
24. MAIN LIMIT
25. FURNACE CONTROL
26. AUXILIARY TRAP
ST-A1194-67-00
IGURE 1
URNACE COMPONENTS
NOTE: A heat loss calculation should be performed to
properly determine the required furnace TU size for the
structure. Also, the duct must be properly designed and in-
stalled for proper airflow. Existing ductwork must be in-
spected for proper size and to make sure that it is properly
sealed. Proper airflow is necessary for both user comfort
and equipment performance.
Before opening the furnace carton, verify that the data
tags on the carton specify the furnace model number
that was ordered from the distributor and are correct
for the installation. If not, return the unit without open-
ing the carton. If the model number is correct, open
the carton and verify that the furnace rating label
specifies the same furnace model number that is
specified on the carton label. If the model numbers do
not match, return the furnace to the distributor.
IMPORTANT: Proper application, installation and mainte-
nance of this furnace and system is a must if consumers
are to receive the full benefits for which they have paid.
The (-)98V series furnaces are design-certified by CSA for
use with natural and propane gases as follows:
1. As non-direct vent central forced air furnaces taking
combustion air from the installation area or using air
ducted from the outside.
2. As direct vent central forced air furnaces with all com-
bustion air supplied directly to the furnace burners
through a special air intake system outlined in these
instructions.Install this furnace in accordance with the
American National Standard Z223.1 – latest edition
entitled “National Fuel Gas Code” (NFPA54) or, for
Canada, CSA 149.1; Canadian Natural Gas and
Propane Installation Code and requirements or codes
of the local utilities or other authorities having jurisdic-
tion. This is available from the following:
National Fire Protection Association, Inc.
atterymarch Park
Quincy, MA 02269
CSA-INTERNATIONAL
5060 Spectrum Way
Mississauga, Ontario
Canada L4W5N6
Online: www.csa.ca
3

4
In Canada installations must comply with CSA 149.1.
Install units in Canada in accordance with CSA- 149,
local installation codes and authorities having jurisdiction.
CSA- 149.1 is available from:
CSA INTERNATIONAL
5060 Spectrum Way
Mississauga, Ontario
Canada L4W 5N6
online: www.csa.ca
NOTICE: Any equipment immersed in water (including by
flooding) must be replaced. Equipment and products im-
mersed in water will have operation adversely affected
thereby voiding the warranty.
RECEIVING
Immediately upon receipt, all cartons and contents should
be inspected for transit damage. Units with damaged car-
tons should be opened immediately. If damage is found, it
should be noted on the delivery papers, and a damage
claim filed with the last carrier.
• After unit has been delivered to job site, remove carton
taking care not to damage unit.
• Check the unit rating plate to be sure equipment
matches job specifications.
• Read the entire instructions before starting the installa-
tion.
• Install the unit in such a way as to allow necessary ac-
cess for service.
• Always remove the solid metal base pan from the top of
the furnace. The base pan is installed in this location for
shipping purposes only and should never remain in the
as-shipped location after installation.
• Install the unit with a 1/4” to 1/2” forward slope (toward
front) to ensure proper drainage.
• Install the unit in accordance with any local code which
may apply and the national codes. Latest editions are
available from: “National Fire Protection Association,
Inc., atterymarch Park, Quincy, MA 02269.” These
publications are:
• ANSI/NFPA No. 70-(Latest Edition) National Electrical
Code.
• NFPA90A Installation of Air Conditioning and Ventilat-
ing Systems.
• NFPA90 Installation of warm air heating and air con-
ditioning systems.
• In Canada CSA 22.2 Canadian Electrical Code.
• In Canada CSA 149.1; Canadian Natural Gas and
Propane Installation Code.
CALI ORNIA RESIDENTS ONLY
IMPORTANT: All manufacturer products meet current
Federal OSHA Guidelines for safety. California Proposition
65 warnings are required for certain products, which are
not covered by the OSHA standards.
California's Proposition 65 requires warnings for products
sold in California that contain, or produce, any of over 600
listed chemicals known to the State of California to cause
cancer or birth defects such as fiberglass insulation, lead
in brass, and combustion products from natural gas.
All “new equipment” shipped for sale in California will have
labels stating that the product contains and/or produces
Proposition 65 chemicals. Although we have not changed
our processes, having the same label on all our products
facilitates manufacturing and shipping. We cannot always
know “when, or if” products will be sold in the California
market.
You may receive inquiries from customers about chemi-
cals found in, or produced by, some of our heating and air-
conditioning equipment, or found in natural gas used with
some of our products. Listed below are those chemicals
and substances commonly associated with similar equip-
ment in our industry and other manufacturers.
• Glass Wool (Fiberglass) Insulation
• Carbon Monoxide (CO)
• Formaldehyde
• enzene
More details are available at the Websites for OSHA (Oc-
cupational Safety and Health Administration), at
www.osha.gov and the State of California's OEHHA (Of-
fice of Environmental Health Hazard Assessment), at
www.oehha.org. Consumer education is important since
the chemicals and substances on the list are found in our
daily lives. Most consumers are aware that products pres-
ent safety and health risks, when improperly used, han-
dled and maintained.
General Informa ion
GENERAL IN ORMATION (cont.)

5
Installation Checklist
REFER TO INSTALLATION INSTRUCTIONS
GAS SUPPLY
______ Correct pipe size (record size)
______ Correct supply pressure (during furnace operation)
______ (record pressure)
______ Low fire manifold pressure (see page 52 for
instructions)
______ High fire manifold pressure (see page 53 for
instructions)
______ No gas leaks
______ L.P. Kit Number (if applicable) (record kit number)
ELECTRICAL
______ 115 V.A.C. supply (Dedicated Circuit)
(record voltage)
______ Polarity observed
______ Furnace properly grounded
______ Correct wire size (record type and gauge)
FURNACE INSTALLATION
______ Correct clearance to combustibles (record
______ clearance)
______ Correct clearance for service (at front) (record
______ clearance)
DUCT STATIC PRESSURE
______ in. w.c. on heating speed (record static pressure)
______ in. w.c. on cooling speed (record static pressure)
______ Air temperature rise in heat (record air temperature
______ rise)
______ Air temperature rise in cool (record air temperature
______ rise)
CONDENSATE LINE
______ Trap filled with water
______ Vented
______ Sloped toward drain
______ Condensate drain line hoses connected and
______ clamped
______ Freeze protection (if necessary)
VENTING – DIRECT VENT
______ in. diameter – intake pipe (record diameter)
______ in. diameter – exhaust pipe (record diameter)
______ ft. of pipe – intake air (record length)
______ no. of elbows – intake air (record number of
______ elbows)
______ ft. of pipe – exhaust pipe (record length)
______ no. of elbows – exhaust pipe (record number of
______ elbows)
______ Exhaust Vent Temperature (record temperature)
TERMINATIONS – DIRECT VENT
VERTICAL
______ Intake – 12" [305mm] min. above roof/snow level
(record height above anticipated snow level)
or, in Canada, intake and exhaust vents conform
with CSA 149.1; Canadian Natural Gas and
Propane Installation Code
______ Correct relationship – exhaust to intake
HORIZONTAL/VERTICAL – CONCENTRIC (RXGY-E03A)
______ Intake – 12" [305mm] min. above roof/snow level
(record height above anticipated snow level)
or, in Canada, intake and exhaust vents conform
with CSA 149.1; Canadian Natural Gas and
Propane Installation Code
______ Exhaust sloped down toward furnace
______ Correct distances (horizontal and vertical) –
exhaust to intake
______ 12" [305mm] min. above grade/snow level (record
height above anticipated snow level) or, in
Canada, intake and exhaust vents conform
with CSA 149.1; Canadian Natural Gas and
Propane Installation Code
______ Above anticipated snow level (record maximum
______ anticipated snow level)
VENTING – NON-DIRECT VENT (Ve tical Venting
Only)
______ in. diameter – exhaust pipe (record diameter)
______ ft. of pipe – exhaust (record length)
______ no. of elbows (record number of elbows)
TERMINATION – NON-DIRECT VENT
VERTICAL
______ 12" [305mm] min. above roof/snow level (record
height above anticipated snow level) or, in
Canada, intake and exhaust vents conform
with CSA 149.1; Canadian Natural Gas and
Propane Installation Code
General Informa ion
Installation Instructions remain with the furnace as a reference guide to the servicing contractor. We recommend
that performance and installation data be recorded for future reference on this sheet to meet service and warranty
obligations so that job site information is available when required.

6
Safe y Informa ion
!WARNING
DO NOT INSTALL THIS URNACE IN A MOBILE HOME!!
THIS URNACE IS NOT APPROVED OR INSTALLATION
IN A MOBILE HOME. DOING SO COULD CAUSE IRE,
PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.
!WARNING
INSTALL THIS URNACE ONLY IN A LOCATION AND PO-
SITION AS SPECI IED IN THE LOCATION REQUIRE-
MENTS AND CONSIDERATIONS SECTION O THESE
INSTRUCTIONS.
!WARNING
IMPROPER INSTALLATION, OR INSTALLATION NOT
MADE IN ACCORDANCE WITH THE CSA INTERNATIONAL
(CSA) CERTI ICATION OR THESE INSTRUCTIONS, CAN
RESULT IN UNSATIS ACTORY OPERATION AND/OR
DANGEROUS CONDITIONS AND ARE NOT COVERED BY
THE MANU ACTURER’S WARRANTY.
SA ETY IN ORMATION
!WARNING
DO NOT BYPASS, JUMPER, OR REMOVE ANY SA ETY
SWITCH ROM THE URNACE CONTROL CIRCUIT. I A
SA ETY SWITCH CAUSES THE URNACE TO SHUT
DOWN OR OPERATE INTERMITTENTLY, IT IS AN INDICA-
TION O A POTENTIAL SA ETY HAZARD THAT MUST
BE ADDRESSED BY A QUALI IED TECHNICIAN, SERV-
ICE AGENCY OR THE GAS SUPPLIER. DO NOT RESET
SA ETY CONTROLS WITHOUT CORRECTIVE ACTION
AND/OR VERI ICATION O PROPER SA E OPERATION
BY A QUALI IED INSTALLER, SERVICE AGENCY OR
THE GAS SUPPLIER.
REPLACE ANY SA ETY CONTROL COMPONENT ONLY
WITH IDENTICAL OEM REPLACEMENT PARTS. WHEN A
NEW SA ETY SWITCH IS INSTALLED, IT MUST BE
TESTED OR A MINIMUM O 15 MINUTES WITH THE
URNACE OPERATING AT MAXIMUM INPUT RATE AND
WITH BOTH BLOWER AND BURNER DOOR INSTALLED.
I THE URNACE IS INSTALLED IN A CLOSET, THE
CLOSET DOOR MUST ALSO BE CLOSED OR THIS
TEST. REPEAT THE TEST AT THE MINIMUM INPUT RATE
I THE URNACE IS A MULTI-STAGE URNACE.
!WARNING
USE ONLY WITH THE TYPE O GAS APPROVED OR
THIS URNACE. RE ER TO THE URNACE RATING
PLATE.
!WARNING
NEVER TEST OR GAS LEAKS WITH AN OPEN LAME.
USE A COMMERCIALLY AVAILABLE SOAP SOLUTION
MADE SPECI ICALLY OR THE DETECTION O LEAKS
TO CHECK ALL CONNECTIONS, AS SPECI IED IN GAS
SUPPLY AND PIPING SECTION O THESE INSTRUC-
TIONS.
!WARNING
COMBUSTION AND VENTILATION AIR MUST BE PRO-
VIDED TO THE URNACE AS REQUIRED BY THE NA-
TIONAL UEL-GAS CODE (U.S.) AND CSA B149.1
(CANADA) AND THE COMBUSTION AND VENTILATION
AIR SECTION O THESE INSTRUCTIONS.
!WARNING
COMBUSTION PRODUCTS MUST BE DISCHARGED OUT-
DOORS. CONNECT THIS URNACE TO AN APPROVED
VENT SYSTEM ONLY, AS SPECI IED IN THE VENT PIPE
INSTALLATION SECTION O THESE INSTRUCTIONS.
!WARNING
WHEN A URNACE IS INSTALLED SO THAT SUPPLY
DUCTS CARRY AIR CIRCULATED BY THE URNACE TO
AREAS OUTSIDE THE SPACE CONTAINING THE UR-
NACE, THE RETURN AIR SHALL ALSO BE HANDLED BY
DUCT(S) SEALED TO THE URNACE CASING AND TER-
MINATING OUTSIDE THE SPACE CONTAINING THE UR-
NACE.
!WARNING
WHENEVER THE ACTORY RETURN-AIR CONNECTION
IS NOT USED IT MUST BE SEALED. A SOLID METAL
BASE PLATE MUST BE INSTALLED AND SEALED. AC-
TORY BASE PLATES ARE AVAILABLE AS ACCESSORY
ITEMS. (PART NUMBERS ARE LISTED IN THE SPEC
SHEET OR THE URNACE.) AILURE TO INSTALL AND
SEAL THE BASE PLATE AND RETURN AIR DUCT CON-
NECTIONS MAY ALLOW CARBON MONOXIDE AND
OTHER CONTAMINANTS TO BE DRAWN INTO THE CON-
DITIONED AIR SPACE AND DISTRIBUTED THROUGHOUT
THE HEATED SPACE.
!WARNING
DO NOT OPERATE THE SYSTEM WITHOUT ILTERS. A
PORTION O THE DUST ENTRAINED IN THE AIR MAY
TEMPORARILY LODGE IN THE AIR DUCT RUNS AND AT
THE SUPPLY REGISTERS. ANY CIRCULATED DUST PAR-
TICLES WILL BE HEATED AND CHARRED BY CONTACT
WITH THE URNACE HEAT EXCHANGER. THIS SOOTY
RESIDUE WILL SOIL CEILINGS, WALLS, DRAPES, CAR-
PETS AND OTHER HOUSEHOLD ARTICLES. SOOT DAM-
AGE MAY ALSO RESULT WITH, OR WITHOUT, ILTERS IN
PLACE, WHEN CERTAIN TYPES O CANDLES ARE
BURNED, OR CANDLEWICKS ARE LE T UNTRIMMED.
!WARNING
IN COMPLIANCE WITH RECOGNIZED CODES, IT IS REC-
OMMENDED THAT AN AUXILIARY DRAIN PAN BE IN-
STALLED UNDER THIS URNACE AND ANY INSTALLED
EVAPORATOR COIL THAT IS LOCATED IN ANY AREA O
A STRUCTURE WHERE DAMAGE TO THE BUILDING OR
BUILDING CONTENTS MAY OCCUR AS A RESULT O AN
OVER LOW O THE URNACE CONDENSATE DIS-
POSAL SYSTEM OR THE COIL DRAIN PAN OR A STOP-
PAGE IN THE PRIMARY CONDENSATE DRAIN PIPING.

E ICIENCY TESTING NOTICE
For purposes of verifying or testing efficiency ratings, the
test procedure in Title 10 APPENDIX N to Subpart of
Part 430 (Uniform Test Method for Measuring the Energy
Consumption of Furnaces and oilers) and the clarifying
provisions provided in the AHRI Operations Manual for
Residential Furnaces that were applicable at the date of
manufacture should be used for test set up and perform-
ance.
IMPORTANT IN ORMATION
ABOUT E ICIENCY AND
INDOOR AIR QUALITY
Central cooling and heating equipment is only as efficient
as the duct system that carries the cooled or heated air.
To maintain efficiency, comfort and good indoor air qual-
ity, it is important to have the proper balance between the
air supplied to each room and the air returning to the
cooling and heating equipment.
Proper balance and sealing of the duct system improves
the efficiency of the heating and air conditioning system
and improves the indoor air quality of the home by reduc-
ing the amount of airborne pollutants that enter homes
from spaces where the ductwork and / or equipment is
located. The manufacturer and the U.S. Environmental
Protection Agency’s Energy Star Program recommend
that central duct systems be checked by a qualified con-
tractor for proper balance and sealing.
Safe y Informa ion
SA ETY
!WARNING
ALWAYS INSTALL THE URNACE TO OPERATE WITHIN
THE URNACE’S INTENDED TEMPERATURE-RISE
RANGE WITH A DUCT SYSTEM WHICH HAS AN EXTER-
NAL STATIC PRESSURE WITHIN THE ALLOWABLE
RANGE, AS SPECI IED IN THE DUCTING SECTION O
THESE INSTRUCTIONS. SEE ALSO URNACE RATING
PLATE.
THE URNACE MAY BE USED OR HEATING O BUILD-
INGS OR STRUCTURES UNDER CONSTRUCTION.
INSTALLATION MUST COMPLY WITH ALL INSTALLATION
INSTRUCTIONS INCLUDING:
PROPER VENT INSTALLATION;-
URNACE OPERATING UNDER THERMOSTAT-
CONTROL;
RETURN AIR DUCT SEALED TO THE URNACE;-
AIR ILTERS IN PLACE;-
SET URNACE INPUT RATE AND TEMPERA--
TURE RISE PER RATING PLATE MARKINGS;
MEANS OR PROVIDING OUTDOOR AIR RE--
QUIRED OR COMBUSTION;
RETURN AIR TEMPERATURE MAINTAINED BE--
TWEEN 55° (13°C) AND 80° (27°C); AND
CLEAN URNACE, DUCT WORK AND COMPO--
NENTS UPON SUBSTANTIAL COMPLETION O
THE CONSTRUCTION PROCESS, AND VERI Y
THAT THE URNACE OPERATING CONDITIONS
INCLUDING IGNITION, INPUT RATE, TEMPERA-
TURE RISE AND VENTING, ACCORDING TO THE
INSTRUCTIONS AND CODES.
!WARNING
DUCT LEAKS CAN CREATE AN UNBALANCED SYSTEM
AND DRAW POLLUTANTS SUCH AS DIRT, DUST, UMES
AND ODORS INTO THE HOME CAUSING PROPERTY
DAMAGE. UMES AND ODORS ROM TOXIC, VOLATILE
OR LAMMABLE CHEMICALS, AS WELL AS AUTOMO-
BILE EXHAUST AND CARBON MONOXIDE (CO), CAN BE
DRAWN INTO THE LIVING SPACE THROUGH LEAKING
DUCTS AND UNBALANCED DUCT SYSTEMS CAUSING
PERSONAL INJURY OR DEATH (SEE IGURE 2).
• I AIR-MOVING EQUIPMENT OR DUCTWORK IS LO-
CATED IN GARAGES OR O -GARAGE STORAGE
AREAS - ALL JOINTS, SEAMS, AND OPENINGS IN THE
EQUIPMENT AND DUCT MUST BE SEALED TO LIMIT
THE MIGRATION O TOXIC UMES AND ODORS IN-
CLUDING CARBON MONOXIDE ROM MIGRATING
INTO THE LIVING SPACE.
• I AIR-MOVING EQUIPMENT OR DUCTWORK IS LO-
CATED IN SPACES CONTAINING UEL BURNING AP-
PLIANCES SUCH AS WATER HEATERS OR BOILERS -
ALL JOINTS, SEAMS, AND OPENINGS IN THE EQUIP-
MENT AND DUCT MUST ALSO BE SEALED TO PRE-
VENT DEPRESSURIZATION O THE SPACE AND
POSSIBLE MIGRATION O COMBUSTION BYPROD-
UCTS INCLUDING CARBON MONOXIDE INTO THE LIV-
ING SPACE.
IGURE 2
MIGRATION O DANGEROUS SUBSTANCES, UMES, AND ODORS INTO
LIVING SPACES
Adapted from Residenti l Duct Di gnostics nd Rep ir, with permission of Air Conditioning
Contractors of America (ACCA).
!WARNING
BLOWER AND BURNERS MUST NEVER BE OPERATED
WITHOUT THE BLOWER DOOR IN PLACE. THIS IS TO
PREVENT DRAWING GAS UMES (WHICH COULD CON-
TAIN HAZARDOUS CARBON MONOXIDE) INTO THE
HOME THAT COULD RESULT IN PERSONAL INJURY OR
DEATH.
7

8
COMMONWEALTH O MASSACHUSETTS NOTE
IMPORTANT! THE COMMONWEALTH O MASSACHU-
SETTS REQUIRES COMPLIANCE WITH REGULATION
248 CMR 4.00 AND 5.00 OR INSTALLATION O
THROUGH-THE-WALL VENTED GAS APPLIANCES AS
OLLOWS:
(a) For all side wall horizontally vented gas fueled equip-
ment 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 O CARBON MONOXIDE DETEC-
TORS. At the time of installation of the side wall horizon-
tal 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 ob-
serve that a battery operated or hard wired carbon
monoxide detector with an alarm is installed on each ad-
ditional 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 se-
cure 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 dur-
ing 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 accor-
dance 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 O 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 sig-
nage installed in accordance with the provisions of 248
CMR 5.08(2)(a) 1 through 4.
(b) 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 e Vented” in the most current edition of
NFPA 54 as adopted by the oard; and
2. Product Approved side wall horizontally vented gas fu-
eled 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 EQUIP-
MENT VENTING SYSTEM PROVIDED. When the manu-
facturer of Product Approved side wall horizontally vented
gas equipment provides a venting system design or vent-
ing system components with the equipment, the instruc-
tions 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 EQUIP-
MENT 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 installa-
tion instructions; and
2. The “special venting systems” shall be Product Ap-
proved by the oard, and the instructions for that system
shall include a parts list and detailed installation instruc-
tions.
(e) A copy of all installation instructions for all Product Ap-
proved side wall horizontally vented gas fueled equip-
ment, all venting instructions, all parts lists for venting
instructions, and/or all venting design instructions shall re-
main with the appliance or equipment at the completion of
the installation.
Safe y Informa ion

9
1. IMPORTANT: If installing the unit over a finished ceil-
ing or living area, be certain to install an auxiliary con-
densate drain pan under the entire unit. This auxiliary
drain pan should extend under any evaporator coil in-
stalled with the furnace and the open portion of the
condensate drain assembly. See “Condensate
Drain/Neutralizer” section for more details.
2. IMPORTANT: If using a cooling evaporator coil with
this furnace, be sure the air passes over the heat ex-
changer before passing over the cooling coil. The
cooled air passing over the warm ambient air inside
the heat exchanger tubes can cause condensation in-
side the tubes resulting in corrosion and eventual fail-
ure.
If these are manual dampers, they must be equipped to
prevent heating or cooling operation unless the damper is
in the full heat or cool position.
3. IMPORTANT: Furnace must be installed level from
front-to-back or with a slight tilt such that the back of
the furnace is up to 1/2” higher than the front of the
furnace as shown in Figure 3.
NOTE: These furnaces are approved for installation in at-
tics, as well as alcoves, utility rooms, closets and crawl-
spaces. Provisions must be made to prevent freezing of
condensate.
REEZE PROTECTION
For installations where the furnace may reach tempera-
tures below 32°F (0°C) (such as an alcove or attic installa-
tion), the installer must take precautions to ensure that the
drain trap and connected drain pipe do not freeze. Local
codes and practices should be followed in order to prevent
freezing.
If the drain trap is installed within the furnace cabinet, no
freeze protection is required. When the trap is mounted
outside or partially outside the cabinet, it must be pro-
tected from freezing. Regardless of the location of the
drain trap, any exposed drain piping must be protected
from freezing as required by local practices or codes. A UL
or CSA listed heat tape or UL or CSA approved heating
cable with a rating of 3-6 watts per foot is acceptable pro-
tection when installed and maintained in accordance with
the manufacturer’s instructions. Good installation practices
necessitate that the installer verify heat tape operation in
accordance with the manufacturer’s instructions at the
time of installation.
IMPORTANT: Support this unit when installed. Since this
furnace is suitable for attic or crawl space installation, it
may be installed on combustible wood flooring or by using
support brackets as required.
SITE SELECTION
1. Select a site in the building near the center of the pro-
posed, or existing, duct system.
2. Give consideration to the vent system piping when se-
lecting the furnace location. e sure the venting sys-
tem can get from the furnace to the termination with
minimal length and elbows.
3. Locate the furnace near the existing gas piping. Or, if
running a new gas line, locate the furnace to minimize
the length and elbows in the gas piping.
4. Locate the furnace to maintain proper clearance to
combustibles as shown in following Figure 5.
IGURE 3
1/4" MIN. TO 1/2" MAX. TILT
TOWARD THE FRONT
OF THE CABINET IN ALL
INSTALLATIONS AND
ORIENTATIONS
UPFLOW / DOWNFLOW
ST-A1194-13-X0
LOCATION REQUIREMENTS
GENERAL IN ORMATION
Loca ion
!WARNING
WHEN THIS URNACE IS INSTALLED IN A RESI-
DENTIAL GARAGE, IT MUST BE INSTALLED SO
THE BURNERS AND IGNITION SOURCE ARE LO-
CATED NO LESS THAN 18 INCHES [450MM] ABOVE
THE LOOR. THIS IS TO PREVENT THE RISK O IG-
NITING LAMMABLE VAPORS WHICH MAY BE
PRESENT IN A GARAGE. ALSO, THE URNACE
MUST BE LOCATED OR PROTECTED TO AVOID
PHYSICAL DAMAGE BY VEHICLES. AILURE TO
OLLOW THESE WARNINGS CAN CAUSE A IRE
OR EXPLOSION, RESULTING IN PROPERTY DAM-
AGE, PERSONAL INJURY OR DEATH.
0-1/2(HIGHER
THAN FRONT
OF FURNACE
ACK FRONT
UPFLOW
!WARNING
THIS URNACE IS NOT APPROVED OR RECOM-
MENDED OR INSTALLATION ON ITS BACK, WITH
ACCESS DOORS ACING UPWARDS.

!WARNING
UP LOW URNACES ARE DESIGN- CERTI IED
OR INSTALLATION ON COMBUSTIBLE LOORS.
NOTE, HOWEVER, THAT URNACES MUST NOT
BE INSTALLED DIRECTLY ON CARPETING, TILE
OR OTHER COMBUSTIBLE MATERIAL OTHER
THAN WOOD LOORING. INSTALLATION ON A
COMBUSTIBLE MATERIAL CAN RESULT IN IRE,
CAUSING PROPERTY DAMAGE, PERSONAL IN-
JURY OR DEATH.
10
Loca ion
CLEARANCE – ACCESSIBILITY
The design of forced air furnaces with input ratings as
listed in the tables under Figure 5 are certified by CSA-In-
ternational for the clearances to combustible materials
shown in inches.
See name/rating plate and clearance label for specific
model number and clearance information.
Service clearance of at least 11” (27.9 cm) is recom-
mended in front of all furnaces.
NOTE: Use recommended 11” (27.9 cm) clearance if ac-
cessibility clearances are greater than fire protection clear-
ances.
GENERAL IN ORMATION (cont.)
IGURE 4
6” 8”
OPTION - A
2” PIPE
OPTION - B
2”-3” PIPE
C
ST-A1194-86-00
CLEARANCE FLUE VENT TO WALL
!WARNING
DO NOT LI T THE UNIT BY THE HEAT EX-
CHANGER TUBES. DOING SO CAN DAMAGE THE
HEAT EXCHANGER ASSEMBLY.
!WARNING
COMBUSTIBLE MATERIAL MUST NOT BE
PLACED ON OR AGAINST THE URNACE
JACKET. THE AREA AROUND THE URNACE
MUST BE KEPT CLEAR AND REE O ALL COM-
BUSTIBLE MATERIALS INCLUDING GASOLINE
AND OTHER LAMMABLE VAPORS AND LIQ-
UIDS. PLACEMENT O COMBUSTIBLE MATERI-
ALS ON, AGAINST OR AROUND THE URNACE
JACKET CAN CAUSE AN EXPLOSION OR IRE
RESULTING IN PROPERTY DAMAGE, PERSONAL
INJURY OR DEATH. THE HOMEOWNER SHOULD
BE CAUTIONED THAT THE URNACE AREA
MUST NOT BE USED AS A BROOM CLOSET OR
OR ANY OTHER STORAGE PURPOSES.
LOCATION REQUIREMENTS
NOTE: THESE
DIMENSIONS
REFER TO
FURNACE
CLEARANCE
ONLY. FOR RE-
QUIRED VENT
CLEARANCES
AND SUP-
PORTS, REFER
TO VENT MAN-
UFACTURER’S
INSTRUC-
TIONS.
NOTE: THESE I USTRATIONS ARE INTENTIONA Y GENERIC.
NOTE: SOME PARTS OF YOUR FURNACE MAY APPEAR DIFFERENT.

11
IGURE 5
UNIT DIMENSIONS (CLEARANCE TO COMBUSTIBLES – SOME MEASUREMENTS DO NOT APPLY TO UP LOWS)
TOPBOTTOM
FRONTLEFT SIDE RIGHT SIDE
RIGHT BACK TOP FRONT VENT
(-)98VA060 (-)98VA070 (-)98VA085 (-)98VA100 (-)98VA115
0 0 0 1 2 0 0 0 0 1 2 0 0 0 0 1 2 0
SHIPPING
WEIGHTS
MINIMUM CLEARANCE (IN.)
MODEL LEFT
SIDE
UNIT DIMENSIONS
(CLEARANCE TO COMBUSTIBLES)
A
I
R
F
L
O
W
A B
.62 .62
34.00
23.33
25.44
26.19
22.63
25.81
26.31
8.00
11.03
17.50 18.13
26.11
29.05
32.65
24.19
22.31
OPTIONAL TRAP
LOCATION
(HORIZONTAL)
OPTIONAL CONDENSATE
DRAIN (DOWNFLOW)
GAS
CONNECTION
OPTIONAL COMBUSTION
VENT LOCATION
OPTIONAL TRAP
LOCATION
(HORIZONTAL)
OPTIONAL VENT
AIR INLET
CONDENSATE DRAIN
(UPFLOW)
ELECTRICAL CONNECTION
LINE VOLTAGE
ELECTRICAL CONNECTION
LOW VOLTAGE
22.96
23.80
8.00
11.00
17.44
29.05
26.17
32.88
23.00
14.00
28.06
1.12
29.62
.62
19.83
OPTIONAL LINE VOLTAGE
WIRING
OPTIONAL LOW VOLTAGE
WIRING
OPTIONAL CONDENSATE
DRAIN (UPFLOW)
TRAP LOCATION
(HORIZONTAL)
OPTIONAL GAS CONNECTION
OPTIONAL
CONDENSATE DRAIN
(DOWNFLOW)
1.76 1.66
24.86 26.26
B
19.83 SUPPLY
AIR
23.21
1.62
1.67
24.91
.30
C
19.77
A
.65
RETURN
AIR
OPTIONAL
VENT OUTLET
KNOCKOUT OPTIONAL COMBUSTION
AIR INLET KNOCKOUT
SUPPLY AND RETURN DEPICTED AS UPFLOW CONFIGURATION.
FLANGE CONFIGURATION WILL VARY DEPENDING ON INSTALLATION ORIENTATION.
A B C
17 1/2 16 17/64 16 13/64
21 19 49/64 19 45/64
24 1/2 23 17/64 23 13/64
FLANGE DIMENSIONS
*A SERVICE CLEARANCE OF AT LEAST 24” IS RECOMMENDED IN FRONT OF ALL FURNACES
0 0 0 1 2 0 0 0 0 1 2 0
ST-A1194-01-X0
Loca ion

Field Conversions
IELD CONVERSIONS
12

IELD CONVERSIONS
Field Conversions
13
SEE NEXT PAGE OR APPLICABLE CON IGURATIONS

Field Conversions
IELD CONVERSIONS
FIELD CONVERSION TO VARIOUS CONFIGURATIONS
Furnaces can be converted to two different upflow configurations as follows. There are two different venting options, includ-
ing a zero-clearance option, to give the installer flexibility in locating the venting for this furnace.
LISTS OF MATERIALS FOR PARTS BAGS AND CONVERSION KITS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pg 12
GENERAL CONVERSION INSTRUCTIONS AND TIPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pg 13
UPFLOW WITH VERTICAL VENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pg 15-16
UPFLOW WITH LEFT SIDE VENT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pg 17-18
DOWNFLOW WITH RIGHT VENT (NON-ZERO CLEARANCE). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pg 19-22
DOWNFLOW ZERO-CLEARANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pg 23-27
HORIZONTAL RIGHT WITH RIGHT VENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pg 28-30
HORIZONTAL RIGHT WITH VERTICAL VENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pg 31-33
HORIZONTAL LEFT WITH RIGHT VENT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pg 34-38
HORIZONTAL LEFT WITH LEFT VENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pg 39-41
AIRFLOW
AIRFLOW
AIRFLOW
AIRFLOW
(REQUIRES CONVERSION
KIT RXGY-CK)
(REQUIRES CONVERSION
KIT RXGY-CK)
(REQUIRES CONVERSION
KIT RXGY-CK AND ZERO-
CLEARANCE KIT RXGY-ZK)
(REQUIRES CONVERSION
KIT RXGY-CK)
(REQUIRES CONVERSION
KIT RXGY-CK)
(REQUIRES CONVERSION
KIT RXGY-CK AND ZERO-
CLEARANCE KIT RXGY-ZK)
(REQUIRES CONVERSION
KIT RXGY-CK)
AIRFLOW
AIRFLOW
AIRFLOW
AIRFLOW
14

Field Conversions
15

Field Conversions
ST-A1194-68-00
16

Field Conversions
17

Field Conversions
18

19
Duc ing
External filter racks are available from the distributor. Use
the following part numbers when ordering:
Proper air flow is required for the correct operation of this
furnace. Restricted air flow can cause erratic operation
and can damage the heat exchanger. The duct system
must carry the correct amount of air for heating and cool-
ing if summer air conditioning is used.
IMPORTANT: When using outside air, design and adjust
the system to maintain a return air temperature A OVE
55° F during the heating season.
NOTE:Return air grilles and warm air registers must not
be obstructed or closed.
NOTE: oth flanges on the supply and return openings
must be bent either up or down but cannot remain flat as
shipped from the factory. See Figure 8 for details.
UP LOW INSTALLATIONS
1. Position the unit to minimize long runs of duct or runs
of duct with many turns and elbows.
2. For side return: Cut an opening in the side. The open-
ing should be cut the full width and height of the
knockouts on the unit. See Figure 9.
3. If summer air conditioning is desired, position the in-
door coil on the supply-air side of the unit. Ensure
that no air can bypass the coil.
4. Connect the furnace to the supply air plenum.
5. Connect the return air ducting to the return-air open-
ing at the bottom and/or side of the unit. Make the
connections air-tight to prevent the migration of toxic
fumes and odors including carbon monoxide from mi-
grating into the living space.
RXGF-CA External Side Filter Rack Kit
RXGF-C External ottom Filter Rack Kit
DUCTING
!WARNING
SOME HEATING AIR LOW VALUES MAY BE HIGHER
THAN THOSE REQUIRED OR COOLING. BE SURE TO
SIZE DUCT OR THE MAXIMUM POSSIBLE AIR LOW
VALUE.
SIZE AIR LOW DISTRIBUTION SYSTEM TO ACCEPT-
ABLE INDUSTRY STANDARDS AND METHODS. TOTAL
STATIC PRESSURE DROP O THE AIR DISTRIBUTION
SYSTEM SHOULD NOT EXCEED 1.0 INCHES W.C. THIS
WILL INCLUDE ANY AIR CONDITIONER COIL, AIR IL-
TRATION SYSTEM, ZONING SYSTEM, DUCTWORK, ETC.
RE ER TO ADDED EQUIPMENT TECHNICAL IN ORMA-
TION TO OBTAIN PRESSURE DROP IN ORMATION
WHEN EQUIPMENT IS OPERATING AT RECOMMENDED
HEATING OR COOLING C MS.
!WARNING
THE SOLID METAL BASE PAN MUST BE REMOVED
ROM THE TOP O THE URNACE BE ORE INSTALLING
THE URNACE. AILURE TO REMOVE THIS PAN ROM
THE SHIPPING POSITION CAN RESULT TO DAMAGE TO
THE URNACE OR EQUIPMENT.
IGURE 6
REMOVE SOLID
BASE FROM TOP
OF UNIT.
2
REMOVE SOLID BASE PANEL FROM THE
TOP BEFORE INSTALLING FURNACE
R
ST-A1194-49
!WARNING
BLOWER AND BURNERS MUST NEVER BE OPERATED
WITHOUT THE BLOWER DOOR IN PLACE. THIS IS TO
PREVENT DRAWING GAS UMES (WHICH COULD CON-
TAIN HAZARDOUS CARBON MONOXIDE) INTO THE
HOME THAT COULD RESULT IN PERSONAL INJURY OR
DEATH.
!WARNING
ZONING SYSTEMS ARE NOT DIRECTLY SUPPORTED IN
THIS MANUAL. I A THIRD PARTY SYSTEM IS USED
RE ER TO THE MANU ACTURER O THAT PRODUCT
OR INSTALLATION AND OPERATION INSTRUCTIONS.
ZONING SYSTEMS USED ON THIS PRODUCT MUST
HAVE SENSORS TO PREVENT URNACES AND/OR
HEATING ELEMENTS ROM CYCLING ON INTERNAL
LIMIT CONTROLS. THE ZONING SYSTEM MUST NOT
ALLOW THE EVAPORATOR COILS AND/OR HYDRONIC
COILS ROM REEZING.

20
6. If a filter is installed near the furnace, be sure to have
adequate space for installation and removal of the
unit filter.
7. NOTE: Where the maximum airflow is 1800 CFM or
more, OTH sides or the bottom must be used for the
return air.
NOTE: DO NOT take return air from furnace rooms,
garages or cold areas. Avoid return air from utility rooms,
kitchens, laundry rooms and bathrooms.
Duc ing
DUCTING
!WARNING
UP LOW URNACE: THE SOLID METAL BASE
PLATE (SHIPPED WITH THE URNACE) MUST BE
INSTALLED IN THE URNACE BOTTOM WHEN
USING SIDE AIR RETURN. AILURE TO INSTALL A
BASE PLATE COULD CAUSE THE PRODUCTS O
COMBUSTION TO CIRCULATE INTO THE LIVING
SPACE AND CREATE POTENTIAL LY HAZARDOUS
CONDITIONS, INCLUDING CARBON MONOXIDE POI-
SONING OR DEATH. OR BOTTOM RETURN, A
SOLID METAL BASE PAN MUST NOT BE IN-
STALLED.
IGURE 7
1REMOVE BLOWER
DOOR AS SHOWN
RETAINING TAB
DETAIL
INSTALLATION OF SOLID METAL BASE FOR SIDE
RETURN APPLICATIONS
INTERNAL VIEW
OF BLOWER
COMPARTMENT
2INSERT TAB ONTO
FLANGE AND PUSH
PANEL INTO PLACE
3INSTALL SCREW IN TAB LOCATED
IN THE BLOWER COMPARTMENT
TAPE ALL EDGES OF BOTTOM
TO COVER GAPS
4AFTER
INSTALLATION
OF BOTTOM
PLATE, SEAL ALL
SEAMS TIGHT
WITH METAL
TAPE
ST-A1194-49