Rheem GRC Series User manual

92-24161-88-00
INSTALLATION INSTRUCTIONS
FOR UPFLOW & DOWNFLOW/HORIZONTAL HIGH
EFFICIENCY CONDENSING GAS FURNACES
(-)GRC/(-)GTC SERIES
U.L. recognized fuel gas and CO (carbon monoxide) detectors are recommended in all
applications, and their installation should be in accordance with the manufacturer’s
recommendations and/or local laws, rules, regulations, or customs.

INSTALLATION CHECK LIST
RE ER TO INSTALLATION INSTRUCTIONS
GAS SUPPLY
Adequate pipe size
Correct supply pressure (during furnace operation)
Manifold pressure
No gas leaks
L.P. Kit Number (if applicable)
ELECTRICAL
115 V.A.C. supply (Single Circuit)
Polarity observed
urnace properly grounded
Adequate wire size
FURNACE INSTALLATION
Adequate clearance to combustibles
Adequate clearance for service (at front)
DUCT STATIC PRESSURE
in. w.c. on heating speed
in. w.c. on cooling speed
Air temperature rise
CONDENSATE LINE
Trap filled with water
Vented
Sloped toward drain
Condensate drain line hoses connected
and clamped
reeze protection (if necessary)
VENTING – DIRECT VENT
in. diameter – intake pipe
in. diameter – exhaust pipe
ft. of pipe – intake air
no. of elbows – intake air
ft. of pipe – exhaust pipe
no. of elbows – exhaust pipe
Exhaust vent temp.
TERMINATIONS – DIRECT VENT
VERTICAL
Intake – 12" min. above roof/snow level
Correct relationship – exhaust to intake
HORIZONTAL/VERTICAL – CONCENTRIC (RXGY-E03A)
Intake – 12" min. above roof/snow level
Intake “Y” rotated above center
Exhaust sloped toward furnace
HORIZONTAL – STANDARD (RXGY-D02, -D02A, -D03,
D03A)
Correct relationship – exhaust to intake
12" min. above grade/snow level
HORIZONTAL – ALTERNATE (RXGY-D02, -D02A, -D03, -
D03A)
Correct relationship – exhaust to intake
Above anticipated snow level
VENTING – NON-DIRECT VENT
in. diameter – exhaust pipe
ft. of pipe – exhaust
no. of elbows
TERMINATION – NON-DIRECT VENT
VERTICAL
12" min. above roof/snow level
HORIZONTAL – STANDARD
12" min. above grade/snow level
HORIZONTAL – ALTERNATE
Above anticipated snow level
Model Number
Serial #
Date of Installation
2

3
SAFETY INFORMATION
NEVER TEST FOR GAS LEAKS
WITH AN OPEN FLAME. USE A
COMMERCIALLY AVAILABLE
SOAP SOLUTION MADE
SPECIFICALLY FOR THE
DETECTION OF LEAKS TO CHECK
ALL CONNECTIONS, AS
SPECIFIED IN GAS SUPPLY AND
PIPING SECTION OF THESE
INSTRUCTIONS.
ALWAYS INSTALL FURNACE TO
OPERATE WITHIN THE
FURNACE'S INTENDED
TEMPERATURE-RISE RANGE
WITH A DUCT SYSTEM WHICH
HAS AN EXTERNAL STATIC
PRESSURE WITHIN THE
ALLOWABLE RANGE, AS
SPECIFIED IN DUCTING SECTION
OF THESE INSTRUCTIONS. SEE
ALSO FURNACE RATING PLATE.
WHEN A FURNACE IS INSTALLED
SO THAT SUPPLY DUCTS CARRY
AIR CIRCULATED BY THE
FURNACE TO AREAS OUTSIDE
THE SPACE CONTAINING THE
FURNACE, THE RETURN AIR
SHALL ALSO BE HANDLED BY
DUCT(S) SEALED TO THE
FURNACE CASING AND
TERMINATING OUTSIDE THE
SPACE CONTAINING THE
FURNACE.
WHEN THIS FURNACE IS
INSTALLED IN A RESIDENTIAL
GARAGE, IT MUST BE INSTALLED
SO THE BURNERS AND IGNITION
SOURCE ARE LOCATED NO LESS
THAN 18 INCHES ABOVE THE
FLOOR. THIS IS TO REDUCE THE
RISK OF IGNITING FLAMMABLE
VAPORS WHICH MAY
BE PRESENT IN A GARAGE.
ALSO, THE FURNACE MUST BE
LOCATED OR PROTECTED TO
AVOID PHYSICAL DAMAGE BY
VEHICLES. FAILURE TO FOLLOW
THESE WARNINGS CAN CAUSE A
FIRE OR EXPLOSION, RESULTING
IN PROPERTY DAMAGE,
PERSONAL INJURY OR DEATH.
INSTALLATION MUST COMPLY
WITH ALL INSTALLATION
INSTRUCTIONS INCLUDING:
• PROPER VENT INSTALLATION;
• FURNACE OPERATING UNDER
THERMOSTATIC CONTROL;
• RETURN AIR DUCT SEALED TO
THE FURNACE;
• AIR FILTERS IN PLACE;
• SET FURNACE INPUT RATE
AND TEMPERATURE RISE PER
RATING PLATE MARKING;
• MEANS FOR PROVIDING
OUTDOOR AIR REQUIRED FOR
COMBUSTION;
• RETURN AIR TEMPERATURE
MAINTAINED BETWEEN 55°F
(13°C) AND 80°F (27°C); AND
• CLEAN FURNACE, DUCT WORK
AND COMPONENTS UPON
SUBSTANTIAL COMPLETION OF
THE CONSTRUCTION
PROCESS, AND VERIFY
FURNACE OPERATING
CONDITIONS INCLUDING
IGNITION, INPUT RATE,
TEMPERATURE RISE AND
VENTING, ACCORDING TO THE
INSTRUCTIONS.
!WARNING
!WARNING
!WARNING
!WARNING
!WARNING
!WARN NG
!WARN NG
!WARN NG
!WARN NG
!WARN NG
DO NOT OPERATE THE SYSTEM
FOR EXTENDED PER ODS
W THOUT F LTERS. A PORT ON
OF THE DUST ENTRA NED N THE
A R MAY TEMPORAR LY LODGE
N THE A R DUCT RUNS AND AT
THE SUPPLY REG STERS. ANY
C RCULATED DUST PART CLES
W LL BE HEATED AND CHARRED
BY CONTACT W TH THE
FURNACE HEAT EXCHANGER.
TH S SOOTY RES DUE W LL SO L
CE L NGS, WALLS, DRAPES,
CARPETS AND OTHER
HOUSEHOLD ART CLES. SOOT
DAMAGE MAY ALSO RESULT
W TH, OR W THOUT, F LTERS N
PLACE, WHEN CERTA N TYPES
OF CANDLES ARE BURNED, OR
CANDLEW CKS ARE LEFT
UNTR MMED.
COMBUST ON PRODUCTS MUST
BE D SCHARGED OUTDOORS.
CONNECT TH S FURNACE TO AN
APPROVED VENT SYSTEM ONLY,
AS SPEC F ED N VENT P PE
NSTALLAT ON SECT ON OF
THESE NSTRUCT ONS.
!WARN NG
DO NOT NSTALL TH S FURNACE
N A MOB LE HOME!! TH S
FURNACE S NOT APPROVED
FOR NSTALLAT ON N A MOB LE
HOME. DO NG SO COULD CAUSE
F RE, PROPERTY DAMAGE,
PERSONAL NJURY OR DEATH.
PROV DE ADEQUATE
COMBUST ON AND VENT LAT ON
A R TO THE FURNACE SPACE AS
SPEC F ED N THE COMBUST ON
AND VENT LAT ON A R SECT ON
OF THESE NSTRUCT ONS.
NSTALL TH S FURNACE ONLY N
A LOCAT ON AND POS T ON AS
SPEC F ED N THE LOCAT ON
REQU REMENTS AND
CONS DERAT ONS SECT ON OF
THESE NSTRUCT ONS. PROV DE
ADEQUATE COMBUST ON AND
VENT LAT ON A R TO THE
FURNACE SPACE AS SPEC F ED
N THE VENT NG SECT ON OF
THESE NSTRUCT ONS.
USE ONLY W TH TYPE OF GAS
APPROVED FOR TH S FURNACE.
REFER TO THE FURNACE RAT NG
PLATE.
SAFETY INFORMATION

4
DUCT LEAKS CAN CREATE AN
UNBALANCED SYSTEM AND
DRAW POLLUTANTS SUCH AS
D RT, DUST, FUMES AND ODORS
NTO THE HOME CAUS NG
PROPERTY DAMAGE. FUMES AND
ODORS FROM TOX C, VOLAT LE
OR FLAMMABLE CHEM CALS, AS
WELL AS AUTOMOB LE EXHAUST
AND CARBON MONOX DE (CO),
CAN BE DRAWN NTO THE L V NG
SPACE THROUGH LEAK NG
DUCTS AND UNBALANCED DUCT
SYSTEMS CAUS NG PERSONAL
NJURY OR DEATH (SEE F GURE
3).
• F A R-MOV NG EQU PMENT OR
DUCTWORK S LOCATED N
GARAGES OR OFF-GARAGE
STORAGE AREAS - ALL JO NTS,
SEAMS, AND OPEN NGS N THE
EQU PMENT AND DUCT MUST
BE SEALED TO L M T THE
M GRAT ON OF TOX C FUMES
AND ODORS NCLUD NG
CARBON MONOX DE FROM
M GRAT NG NTO THE L V NG
SPACE.
• F A R-MOV NG EQU PMENT OR
DUCTWORK S LOCATED N
SPACES CONTA N NG FUEL
BURN NG APPL ANCES SUCH
AS WATER HEATERS OR
BO LERS - ALL JO NTS, SEAMS,
AND OPEN NGS N THE
EQU PMENT AND DUCT MUST
ALSO BE SEALED TO PREVENT
DEPRESSUR ZAT ON OF THE
SPACE AND POSS BLE
M GRAT ON OF COMBUST ON
BYPRODUCTS NCLUD NG
CARBON MONOX DE NTO THE
L V NG SPACE.
MPROPER NSTALLAT ON, OR
NSTALLAT ON NOT MADE N
ACCORDANCE W TH THE CSA
NTERNAT ONAL (CSA)
CERT F CAT ON OR THESE
NSTRUCT ONS, CAN RESULT N
UNSAT SFACTORY OPERAT ON
AND/OR DANGEROUS COND -
T ONS AND ARE NOT COVERED
BY THE UN T WARRANTY.
N COMPL ANCE W TH
RECOGN ZED CODES, T S
RECOMMENDED THAT AN
AUX L ARY DRA N PAN BE
NSTALLED UNDER ALL
EVAPORATOR CO LS OR UN TS
CONTA N NG EVAPORATOR
CO LS OR GAS FURNACES USED
W TH EVAPORATOR CO LS THAT
ARE LOCATED N ANY AREA OF A
STRUCTURE WHERE DAMAGE TO
THE BU LD NG OR BU LD NG
CONTENTS MAY OCCUR AS A
RESULT OF AN OVERFLOW OF
THE CO L DRA N PAN OR A
STOPPAGE N THE PR MARY
CONDENSATE DRA N P P NG.
4. NSPECT ON. The state or local
gas inspector of the side wall
horizontally vented gas fueled
equipment shall not approve the
installation unless, upon inspection,
the inspector observes carbon
monoxide detectors and signage
installed in accordance with the
provisions of 248 CMR 5.08(2)(a) 1
through 4.
(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
Be Vented” in the most current edition
of N PA 54 as adopted by the Board;
and
2. Product Approved side wall hori-
zontally vented gas fueled equipment
installed in a room or structure sepa-
rate from the dwelling, building or
structure used in whole or in part for
residential purposes.
(c) MANU ACTURER REQUIRE-
MENTS – GAS EQUIPMENT VENT-
ING SYSTEM PROVIDED. When the
manufacturer of Product Approved
side wall horizontally vented gas
equipment provides a venting system
design or venting system components
with the equipment, the instructions
provided by the manufacturer for
installation of the equipment and the
venting system shall include:
1. Detailed instructions for the instal-
lation 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) MANU ACTURER REQUIRE-
MENTS – GAS EQUIPMENT VENT-
ING 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 identified “special
venting systems”, the following
requirements shall be satisfied by the
manufacturer:
1. The referenced “special venting
system” instructions shall be included
with the appliance or equipment
installation instructions; and
2. The “special venting systems” shall
be Product Approved by the Board,
and the instructions for that system
shall include a parts list and detailed
installation instructions.
(e) A copy of installation instructions
for all Product Approved side wall
horizontally vented gas fueled equip-
ment, all venting instructions, all parts
lists for venting instructions, and/or all
venting design instructions shall
remain with the appliance or
equipment at the completion of the
installation.
!WARN NG
NOT CE
NOT CE
MPORTANT!
THE COMMONWEALTH OF
MASSACHUSETTS REQU RES
COMPL ANCE W TH REGULAT ON
248 CMR 4.00 AND 5.00 FOR
NSTALLAT ON OF THROUGH-THE-
WALL VENTED GAS APPL ANCES AS
FOLLOWS:
(a) or all side wall horizontally vented
gas fueled equipment installed in every
dwelling, building or structure used in
whole or in part for residential purposes,
including those owned or operated by the
Commonwealth and where the side wall
exhaust vent termination is less than
seven (7) feet above finished grade in
the area of the venting, including but not
limited to decks and porches, the
following requirements shall be satisfied:
1. NSTALLAT ON OF CARBON
MONOX DE DETECTORS. At the time
of installation of the side wall horizontal
vented gas fueled equipment, the instal-
ling plumber or gasfitter shall observe that
a hard wired carbon monoxide detector
with an alarm and battery back-up is
installed on the floor level where the gas
equipment is to be installed. In addition,
the installing plumber or gasfitter shall
observe that a battery operated or hard
wired carbon monoxide detector with an
alarm is installed on each additional level
of the dwelling, building or structure
served by the side wall horizontal vented
gas fueled equipment. It shall be the
responsibility of the property owner to
secure the services of qualified licensed
professionals for the installation of hard
wired carbon monoxide detectors.
a. In the event that the side wall horizon-
tally vented gas fueled equipment is in-
stalled 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 require-
ments; provided, however, that during
said thirty (30) day period, a battery
operated carbon monoxide detector with
an alarm shall be installed.
2. APPROVED CARBON MONOX DE
DETECTORS. Each carbon monoxide
detector is required in accordance with
the above provisions shall comply with
N PA 720 and be ANSI/UL 2034 listed
and IAS certified.
3.S GNAGE. A metal or plastic identifica-
tion plate shall be permanently mounted
to the exterior of the building at a mini-
mum 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 D RECTLY BELOW. KEEP
CLEAR OF ALL OBSTRUCT ONS”.
SAFETY INFORMATION

5
IMPORTANT: TO INSURE PROPER INSTALLATION AND OPERATION O
THIS PRODUCT, COMPLETELY READ ALL INSTRUCTIONS PRIOR TO
ATTEMPTING TO ASSEMBLE, INSTALL, OPERATE, MAINTAIN OR REPAIR
THIS PRODUCT. UPON UNPACKING O THE URNACE, INSPECT ALL
PARTS OR DAMAGE PRIOR TO INSTALLATION AND START-UP.
CONTENTS
Safety Precautions...................................................................................................1
Installation Check List ..............................................................................................2
Safety Information....................................................................................................3
General Information..................................................................................................6
Location Requirements and Considerations............................................................8
Ducting ...................................................................................................................13
Venting and Combustion Air Piping .......................................................................14
Combustion and Ventilation Air..............................................................................16
Vent Pipe Installation..............................................................................................19
Condensate Drain/Neutralizer................................................................................32
Converting Downflow to Horizontal........................................................................34
Gas Supply and Piping...........................................................................................36
High Altitude Instructions........................................................................................38
Electrical Wiring......................................................................................................41
Accessories............................................................................................................42
urnace Twinning...................................................................................................42
Start-Up Procedures...............................................................................................46
Air low...................................................................................................................48
Maintenance...........................................................................................................51
Troubleshooting......................................................................................................54
Wiring Diagrams................................................................................................55-56
IMPORTANT: All manufacturer
products meet current ederal 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 chemicals 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 equipment in
our industry and other manufacturers.
• Glass Wool ( iberglass) Insulation
• Carbon Monoxide (CO)
• ormaldehyde
• Benzene
More details are available at the
Websites for OSHA (Occupational
Safety and Health Administration), at
www.osha.gov and the State of
California's OEHHA (Office 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
present safety and health risks, when
improperly used, handled and
maintained.

The (-)GRC and (-)GTC 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 combustion air
supplied directly to the furnace
burners through a special air
intake system outlined in these
instructions.
6
Install this furnace in accordance with
the American National Standard
Z223.1 – latest edition entitled
“National uel Gas Code” (N PA54)
and requirements or codes of the
local utilities or other authorities
having jurisdiction. This is available
from the following:
National ire Protection
Association, Inc.
Batterymarch Park
Quincy, MA 02269
CSA-INTERNATIONAL
8501 East Pleasant Valley Road
Cleveland, Ohio 44131-5575
Install units in Canada in accordance
with CSA-B149, local installation
codes and authorities having
jurisdiction. CSA-B149 is available
from:
CSA-INTERNATIONAL
178 Rexdale Blvd.
Toronto, Ontario
Canada M9W, 1R3
GENERAL INFORMATION
FIGURE 1
UPFLOW FURNACE
FIGURE 2
DOWNFLOW/HORIZONTAL FURNACE
ITEM ITEM
NO. PART NAME NO. PART NAME
1 INDUCED DRAFT BLOWER 14 LOW VOLTAGE TERMINAL (THERMOSTAT)
2 CAPACITOR 15 TRANSFORMER
3 INLET AIR CHASE 16 PRESSURE SWITCH
4 DOOR SWITCH 17 OUTLET AIR PIPE
5 JUNCTION BOX 18 GAS VALVE
6 INLET PIPE CONNECTOR 19 CONNECTOR
7 TOP PLATE 20 EXHAUST TRANSITION
8 CONTROL MOUNTING PLATE 21 CONDENSATE TRAP
9 AUXILIARY LIMIT 22 IGNITER (HSI)
10 SHIPPING PLUG 23 MANIFOLD
11 EXHAUST CONNECTION 24 OVERTEMPERATURE SWITCH
12 BLOWER 25 ROLLOUT SWITCH
13 EXHAUST PIPE EXTENSION 26 FLAME SENSOR
27 BURNER
ITEM ITEM
NO. PART NAME NO. PART NAME
1 CONDENSATE TRAP 13 TOP PLATE
2 DOOR SWITCH 14 BURNER
3 JUNCTION BOX 15 IGNITER (HSI ONLY)
4 TRANSFORMER 16 COMBUSTION AIR INLET
5 BLOCKED DRAIN PRESSURE SWITCH 17 GAS VALVE
6 MAIN PRESSURE SWITCH 18 INDUCED DRAFT BLOWER
7 EXHAUST TRANSITION 19 CAPACITOR
8 CONNECTOR 20 LOW VOLTAGE (THERMOSTAT)
9 OUTLET AIR PIPE TERMINAL
10 SHIPPING PLUG 21 CONTROL MOUNTING PLATE
11 FLAME SENSOR 22 BLOWER
12 OVERTEMPERATURE SWITCH
I409 I409

7
“National ire Protection
Association, Inc., Batterymarch
Park, Quincy, MA 02269.” These
publications are:
• ANSI/N PA No. 70-(Latest Edition)
National Electrical Code.
• N PA90A Installation of Air
Conditioning and Ventilating
Systems.
• N PA90B Installation of warm air
heating and air conditioning
systems.
• The equipment has been
evaluated in accordance with the
Code of ederal Regulations,
Chapter XX, Part 3280.
IMPORTANT
INFORMATION ABOUT
EFFICIENCY 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 quality, it
is important to have the proper
balance between the air being
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 reducing 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 contractor
for proper balance and sealing.
DUCT LEAKS CAN CREATE AN
UNBALANCED SYSTEM AND
DRAW POLLUTANTS SUCH AS
D RT, DUST, FUMES AND ODORS
NTO THE HOME CAUS NG
PROPERTY DAMAGE. FUMES
AND ODORS FROM TOX C,
VOLAT LE OR FLAMMABLE
CHEM CALS, AS WELL AS
AUTOMOB LE EXHAUST AND
CARBON MONOX DE (CO), CAN
BE DRAWN NTO THE L V NG
SPACE THROUGH LEAK NG
DUCTS AND UNBALANCED DUCT
SYSTEMS CAUS NG PERSONAL
NJURY OR DEATH (SEE F GURE
3).
• F A R-MOV NG EQU PMENT OR
DUCTWORK S LOCATED N
GARAGES OR OFF-GARAGE
STORAGE AREAS - ALL JO NTS,
SEAMS, AND OPEN NGS N THE
EQU PMENT AND DUCT MUST
BE SEALED TO L M T THE
M GRAT ON OF TOX C FUMES
AND ODORS NCLUD NG
CARBON MONOX DE FROM
M GRAT NG NTO THE L V NG
SPACE.
• F A R-MOV NG EQU PMENT OR
DUCTWORK S LOCATED N
SPACES CONTA N NG FUEL
BURN NG APPL ANCES SUCH
AS WATER HEATERS OR
BO LERS - ALL JO NTS, SEAMS,
AND OPEN NGS N THE
EQU PMENT AND DUCT MUST
ALSO BE SEALED TO PREVENT
DEPRESSUR ZAT ON OF THE
SPACE AND POSS BLE
M GRAT ON OF COMBUST ON
BYPRODUCTS NCLUD NG
CARBON MONOX DE NTO THE
L V NG SPACE.
MPROPER NSTALLAT ON, OR
NSTALLAT ON NOT MADE N
ACCORDANCE W TH THE CSA
NTERNAT ONAL (CSA)
CERT F CAT ON OR THESE
NSTRUCT ONS, CAN RESULT N
UNSAT SFACTORY OPERAT ON
AND/OR DANGEROUS COND -
T ONS AND ARE NOT COVERED BY
THE UN T WARRANTY.
N COMPL ANCE W TH
RECOGN ZED CODES, T S
RECOMMENDED THAT AN
AUX L ARY DRA N PAN BE
NSTALLED UNDER ALL
EVAPORATOR CO LS OR UN TS
CONTA N NG EVAPORATOR CO LS
OR GAS FURNACES USED W TH
EVAPORATOR CO LS THAT ARE
LOCATED N ANY AREA OF A
STRUCTURE WHERE DAMAGE TO
THE BU LD NG OR BU LD NG
CONTENTS MAY OCCUR AS A
RESULT OF AN OVERFLOW OF THE
CO L DRA N PAN OR A STOPPAGE
N THE PR MARY CONDENSATE
DRA N P P NG.
matches what is required for the
job specification.
• Read the entire instructions before
starting the installation.
• Some building codes require extra
cabinet insulation and gasketing
when unit is installed in attic
applications.
• If installed in an unconditioned
space, apply caulking around the
power wires, control wires,
refrigerant tubing and condensate
line where they enter the cabinet.
Seal the power wires on the inside
where they exit conduit opening.
Caulking is required to prevent air
leakage into and condensate from
forming inside the unit, control box,
and on electrical controls.
• Install the unit in such a way as to
allow necessary access to the
coil/filter rack and blower/control
compartment.
• Install the unit in a level position to
ensure proper condensate
drainage. Make sure unit is level in
both directions within 1/8”.
• Install the unit in accordance with
any local code which may apply
and the national codes. Latest
editions are available from:
RECEIVING
Immediately upon receipt, all cartons
and contents should be inspected for
transit damage. Units with damaged
cartons 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 for unit
size, electric heat, coil, voltage,
phase, etc. to be sure equipment
NOT CE
NOT CE
!WARN NG
F GURE 3
M GRAT ON OF DANGEROUS SUBSTANCES, FUMES, AND ODORS NTO L V NG SPACES

8
8
GENERAL INFORMATION
DO NOT USE THIS FURNACE
DURING CONSTRUCTION IF AIR
LADEN CORROSIVE
COMPOUNDS ARE PRESENT
SUCH AS CHLORINE AND
FLUORINE. OTHERWISE,
PROVISIONS MUST BE TAKEN TO
PROVIDE CLEAN,
UNCONTAMINATED
COMBUSTION AND VENTILATION
AIR TO THE FURNACE. FURNACE
COMBUSTION AND VENTILATION
AIR CONTAMINATED WITH THESE
COMPOUNDS FORMS ACIDS
DURING COMBUSTION WHICH
CORRODES THE HEAT
EXCHANGER AND COMPONENT
PARTS. SOME OF THESE
CONTAMINANTS ARE FOUND IN,
BUT NOT LIMITED TO, PANELING,
DRY WALL, ADHESIVES, PAINTS,
STAINES, VARNISHES, SEALERS,
AND MASONRY CLEANING
MATERIALS.
DO NOT INSTALL THIS FURNACE
IN A MOBILE HOME!! This furnace
is not approved for installation in a
mobile home. Doing so could cause
FIRE, PROPERTY DAMAGE,
PERSONAL INJURY OR DEATH.
WHEN THIS FURNACE IS
INSTALLED IN A RESIDENTIAL
GARAGE, IT MUST BE INSTALLED
SO THE BURNERS AND IGNITION
SOURCE ARE LOCATED NO LESS
THAN 18 INCHES ABOVE THE
FLOOR. THIS IS TO PREVENT
THE RISK OF IGNITING
FLAMMABLE VAPORS WHICH
MAY BE PRESENT IN A GARAGE.
ALSO, THE FURNACE MUST BE
LOCATED OR PROTECTED TO
AVOID PHYSICAL DAMAGE BY
VEHICLES. FAILURE TO FOLLOW
THESE WARNINGS CAN CAUSE A
FIRE OR EXPLOSION, RESULTING
IN PROPERTY DAMAGE,
PERSONAL INJURY OR DEATH.
1. IMPORTANT: If installing the
unit over a finished ceiling or
living area, be certain to install an
auxiliary condensate drain pan
under the entire unit. This
auxiliary drain pan should extend
under any evaporator coil
installed 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:
a. be sure the air passes over
the heat exchanger before
passing over the cooling
coil. The cooled air passing
over the warm ambient air
inside the heat exchanger
tubes can cause
condensation inside the tubes
resulting in corrosion and
eventual failure.
b. install a parallel duct system
to divert all the air from the
furnace allowing it to pass
over the cooling coil only. Use
dampers or other means to
prevent chilled air from
passing over the heat
exchanger.
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.
!WARNING
!WARNING
3. IMPORTANT: Install the furnace
level. If it is not level, condensate
cannot drain properly, possibly
causing furnace shut down.
NOTE: These furnaces are approved
for installation in attics, as well as
alcoves, utility rooms, closets and
crawlspaces. Provisions must be
made to prevent freezing of
condensate.
4.
If this furnace is installed in a
ara e, attic and/or any
unconditioned space, install a
self-re ulatin heat tape
around the condensate trap
and alon the entire len th of
the condensate drain in the
unconditioned space. See
Fi ure 4.
hen the condensing horizontal
gas furnace is installed in an
unconditioned space where the
temperature would be capable of
reaching close to or below 32°F
(0°C). a self-regulating heat tape
is required on the condensate
drain, along with an insulation
wrap. The heat tape should meet
the following requirements:
a. The heat tape must be UL
listed.
b. The heat tape must be
installed per the
manufacturer’s instructions for
the entire length of drain pipe
in the unconditioned space.
FIGURE 4
HORIZONTAL FURNACE W/HEAT TAPE ON CONDENSATE TRAP
DRAIN
PIPE
HEAT
TAPE
TRAP
I526
WARNING
!
LOCATION REQUIREMENTS AND CONSIDERATIONS
CAUTION
!

9
SITE SELECTION
1. Select a site in the building near
the center of the proposed, or
existing, duct system.
2. Give consideration to the vent
system piping when selecting the
furnace location. Be sure the
venting system 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 the following tables.
DO NOT LIFT THE UNIT BY THE
HEAT EXCHANGER TUBES.
DOING SO CAN CRACK THE HEAT
EXCHANGER ASSEMBLY AND
CAUSE CO2 TO BE RELEASED
INTO THE ENVIRONMENT, WHICH
CAN RESULT IN PERSONAL
INJURY OR DEATH.
!WARNING
COMBUSTIBLE MATERIAL MUST
NOT BE PLACED ON OR AGAINST
THE FURNACE JACKET. THE
AREA AROUND THE FURNACE
MUST BE KEPT CLEAR AND FREE
OF ALL COMBUSTIBLE
MATERIALS INCLUDING
GASOLINE AND OTHER
FLAMMABLE VAPORS AND
LIQUIDS. PLACEMENT OF
COMBUSTIBLE MATERIALS ON,
AGAINST OR AROUND THE
FURNACE JACKET CAN CAUSE
AN EXPLOSION OR FIRE
RESULTING IN PROPERTY
DAMAGE, PERSONAL INJURY OR
DEATH. THE HOMEOWNER
SHOULD BE CAUTIONED THAT
THE FURNACE AREA MUST NOT
BE USED AS A BROOM CLOSET
OR FOR ANY OTHER STORAGE
PURPOSES.
c. The heat tape should be rated
at 5 or 6 watts per foot at
120V.
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. See
Figure 5.
5. IMPORTANT: If installing in a
utility room, be sure the door
is wide enough to:
a. allow the largest part of the
furnace to pass; or
b. allow any other appliance
(such as a water heater)
to pass.
6. IMPORTANT: This furnace is not
approved or recommended for
installation on its back, with
access doors facing upwards.
CLEARANCE -
ACCESSIBILITY
The design of forced air furnaces with
input ratings as listed in the tables
under igures 6, 7, and 8 are certified
by CSA-International 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 24
inches is recommended in front of
all furnaces.
NOTE: Use recommended 24”
clearance if accessibility clearances
are greater than fire protection
clearances.
UPFLOW AND HORIZONTAL
FURNACES ARE DESIGN-
CERTIFIED FOR INSTALLATION
ON COMBUSTIBLE FLOORS.
NOTE, HOWEVER, THAT
FURNACES MUST NOT BE
INSTALLED DIRECTLY ON
CARPETING, TILE OR OTHER
COMBUSTIBLE MATERIAL OTHER
THAN WOOD FLOORING.
INSTALLATION ON A
COMBUSTIBLE MATERIAL CAN
RESULT IN FIRE, CAUSING
PROPERTY DAMAGE, PERSONAL
INJURY OR DEATH.
FIGURE 5
HORIZONTAL FURNACE INSTALLED W/SUPPORT BRACKETS
!WARNING
Upflow furna es are shipped with a
bottom losure panel installed.
When bottom return air is used,
remove the panel by removing the
two s rews atta hing the panel to
the front base angle. See Figure 51.
GAS
PIPE
TRAP
EXHAUST
AN
ELECTRICAL
CONDUIT
INTAKE
VENT
I522
!WARNING

FIGURE 6
CLEARANCE TO COMBUSTIBLES, UPFLOW UNITS
UPFLOW MODELS MINIMUM CLEARANCE (IN.)
LEFT RIGHT SHIP
MODEL A B C D E F SIDE SIDE BACK TOP FRONT VENT
WGTS
04 171⁄21611⁄32 155⁄82 15 1325⁄32 0 0 0 1 2*0 111 06 171⁄21611⁄32 155⁄82 15 1325⁄32 0 0 0 1 2*0 117 07 171⁄21611⁄32 155⁄82 15 1325⁄32 0 0 0 1 2*0 124 07 21 1927⁄32 193⁄16 2 181⁄2173⁄80 0 0 1 2*0 137 09 21 1927⁄32 191⁄82 181⁄2179⁄32 0 0 0 1 2*0 148 10 21 1927⁄32 191⁄82 181⁄2179⁄32 0 0 0 1 2*0 152
10
I392
*A service clearance of at least 24 inches is recommen e in front of all furnaces.
SUPPLY
AIR
RETURN
AIR
AIRFLOW
2 DIA. GAS CONNECTION
273⁄8
267⁄16
2 DIA. GAS CONNECTION