Nordyne E3EB-017H, E3EB-010H, E3EB-020H, E3EB-023H, E3EX-010 Owner's Manual & Installation Instructions
...
Downfl ow, Upfl ow Electric Furnaces
Owners Manual & Installation Instructions
E3 Series (Air Conditioner / Heat Pump Air Handler)
User, please read this information thoroughly and become familiar with the capabilities and
use of your appliance before attempting to operate or maintain this unit. Keep this literature
where you have easy access to it in the future. If a problem occurs, check the instructions and
follow recommendations given. If these suggestions don’t eliminate your problem, call your
servicing contractor.
The Installation Instructions are primarily intended to assist qualifi ed individuals experienced
in the proper installation of this appliance. Some local codes require licensed installation/
service personnel for this type of equipment. Please read all instructions carefully before
starting the installation.
DO NOT DESTROY. PLEASE READ CAREFULLY AND
KEEP IN A SAFE PLACE FOR FUTURE REFERENCE.
IMPORTANT
TABLE OF CONTENTS
USER INFORMATION
IMPORTANT SAFETY INFORMATION .......................3
OPERATING INSTRUCTIONS .....................................3
Cooling Operation ................................................... 3
Heating Operation ...................................................3
Operating the Blower Continuously .........................3
Turning the Heater OFF ..........................................4
INSTALLER INFORMATION
IMPORTANT SAFETY INFORMATION .......................5
REQUIREMENTS & CODES .......................................5
Minimum Installation Clearance .............................. 5
Clearances to Combustible Materials .....................5
CIRCULATING AIR REQUIREMENTS ........................ 6
Plenums & Air Ducts ...............................................6
Return Air Connections ........................................6
Supply Air Connections........................................6
Acoustical Ducts ..................................................6
Unconditioned Spaces.............................................7
Closed-Off Spaces ..................................................7
Filtering Methods - Downfl ow Furnaces .................. 7
Non-Ducted Return Air ........................................7
Without AC or HP Uncased Coil ......................7
With AC or HP Uncased Coil ...........................7
With Optional Coil Housing ..............................7
Ducted Return Air ................................................7
Without Optional Coil Housing .........................7
With Optional Coil Housing ..............................7
Filtering Methods - Upfl ow Furnaces .......................7
Non-Ducted Return Air ........................................7
Without Optional Upfl ow Stand ........................7
With Optional Upfl ow Stand .............................7
Ducted Return Air ................................................7
FURNACE INSTALLATION .........................................8
General nformation .................................................8
Before You Install this Furnace ................................8
Locating the Unit .....................................................8
Optional Equipment .................................................8
Return Air Grille ...................................................8
Automatic Furnace Damper ................................. 8
Duct Connectors for Downfl ow Systems .............. 8
Locating & Cutting Floor Openings .........................9
UNIT MAINTENANCE ..................................................4
Furnace Filter ..........................................................4
Coil Filter .................................................................4
Blower Compartment ..............................................4
TROUBLESHOOTING .................................................4
Standard Duct Connector Installation ...................10
Narrow Duct Connector Installation ......................10
Round Duct Connector Installation .......................11
Alcove Installations ...............................................11
Closet Installations ................................................11
Downfl ow Furnaces ...............................................11
Upfl ow Furnaces ...................................................12
Over the Floor Return Air (Non-Ducted) ............12
Through the Floor Return Air (Ducted) ..............13
ELECTRICAL WIRING ...............................................13
Line Voltage Wiring ................................................13
Connecting Supply Service Wires .........................14
Grounding ..............................................................14
Thermostat / Low Voltage Connections .................14
Selecting Blower Speed ........................................14
Changing Blower Speed ........................................15
Blower Installation .................................................15
Installing Control Circuit Wiring .............................15
START-UP & ADJUSTMENTS ...................................16
Pre-Start Checklist ................................................16
Start-Up Procedures ..............................................16
FIGURES & TABLES .................................................17
Figure 20. Furnace Components ..........................17
Figure 21. Furnace Physical Dimensions ..............18
Figure 22. Upfl ow Stand Dimensions ....................18
Table 6. Unit Specifi cations ...................................19
Table 7. Electrical Specifi cations ...........................20
Figure 23. E3EB-010H Wiring Diagram .................21
Figure 24. E3EB-012H Wiring Diagram .................22
Figure 25. E3EB-015H & 017H W.D. .....................23
Figure 26. E3EB-020H, 023H, & 5 Ton W.D. .........24
INSTALLATION PERFORMANCE CHECKLIST .......28
2
USER INFORMATION
IMPORTANT SAFETY INFORMATION
Safety markings are used to designate a degree or level
of seriousness and should not be ignored. WARNING
indicates a potentially hazardous situation that if not
avoided, could result in personal injury or death. CAUTION
indicates a potentially hazardous situation that if not
avoided, may result in minor or moderate injury or proper ty
damage.
WARNING:
Improper service, adjustment or maintenance
of unit may cause fi re, electrical shock, or
hazardous conditions which may result in
personal injury, property damage, or death.
Installation or servicing should only be
performed by qualified trained personnel
thoroughly familiar with this type equipment
WARNING:
Do not use this furnace if any part has been under
water. A fl ood damaged furnace is extremely
dangerous. Attempts to use the furnace can
result in fi re or explosion. A qualifi ed service
agency should be contacted to inspect the
furnace and to replace any electrical or control
system parts that have been wet or under water.
OPERATING INSTRUCTIONS
NOTE: Thermostat styles vary. Some models may not
include the AUTO mode and others will have the AUTO
in place of the HEAT and COOL. Others may include all
three. Please refer to the thermostat manufacturer’s User
manual for detailed programming instructions.
WARNING:
Do not store or place fl ammable or vaporous
materials (paint thinners, etc.) in the vicinity
of this appliance. Failure to comply may cause
fi re, explosion, or other hazardous conditions
which may result in serious injury, death or
property damage.
The following list of chemicals should not be used or
stored near the furnace:
• Chlorinated cleaners
• Water softening chemicals
• De-icing salts or chemicals
• Household Cleaning Solutions
• Printing inks, paint removers, varnishes, etc.
• Cements and glues
• Antistatic fabric softeners
NOTE: Allow at least one hour for the room temperature
to stabilize before you make a second adjustment to
the thermostat setting. After the desired comfort level is
established, make only small adjustments to the thermostat
setting to meet changing temperature conditions.
Cooling Operation
1. Set the thermostat’s system mode to COOL or AUTO
and change the fan mode to AUTO. See Figure 1.
2. Set the temperature selector to the desired temperature
level. The outdoor fan, compressor, and blower
motor will all cycle on and off to maintain the indoor
temperature at the desired cooling level.
Heating Operation
1. Set the thermostat’s system mode to HEAT or AUTO
and change the fan mode to AUTO. See Figure 1.
2. Set the temperature selector to the desired temperature
level. The compressor, outdoor fan, and blower motor
will cycle on and off to maintain the indoor temperature
at the desired heating level.
Operating the Indoor Blower Continuously
The continuous indoor blower operation is typically used to
circulate the indoor air to equalize a temperature unbalance
due to a sun load, cooking, or fi replace operation.
Fan
Mode
Figure 1. Digital Thermostat
System
Mode
Temperature
Selector
Set the thermostat fan mode to ON (Figure 1). The indoor
blower starts immediately, and will run continually until the
fan mode is reset to AUTO.
The continuous indoor blower operation can be obtained
with the thermostat system mode set in any position,
including OFF.
3
USER INFORMATION
Turning the Heater OFF
Change the thermostat’s system mode to OFF and the fan
mode to AUTO (See Figure 1). NOTE: The system will not
operate, regardless of the temperature selector setting.
CAUTION:
For optional A/C or H/P systems, always wait
at least fi ve minutes after the system shuts off
before restarting the system.
UNIT MAINTENANCE
WARNING:
Shut off all electrical power to the unit before
performing any maintenance or service on the
system. Failure to comply may result in personal
injury or death.
CAUTION:
There are No user serviceable parts inside the
control panel. DO NOT OPEN.
NOTE: All servicing of this heating appliance other than
the normal maintenance described in this section must
be done by authorized trained service personnel. Do
not attempt any servicing which requires opening of the
control panels.
• Proper maintenance is most important to achieve the
best performance from the appliance and should be
performed frequently at the beginning of each heating
season.
• Keep the area surounding the unit clean. Keep the unit
clear of obstructions.
renovated homes may require more frequent changing
until the construction dust has minimized. Filter sizes
shown in Table 6 (page 19) are available at most local
retailers.
necessary with fi lter of same dimensional size
•
Filters designed to remove smaller particles such as
pollen, may require additional maintenance.
Coil Filters
If a cooling coil is installed on your unit, the furnace fi lter
is not used. Remove coil fi lters, wash, and allow to dry.
Re-install coil fi lters to their original positions.
Blower Compartment
Dirt and lint can create excessive loads on the motor
resulting in higher than normal operating temperatures and
shortened service life. Vacuum or wipe clean the interior
of furnace cabinet. Clean all lint and dust from around the
furnace. It is recommended that the blower compartment
be cleaned of dirt or lint that may have accumulated in
the compartment or on the blower and motor as part of
regular maintenance.
Inspect fi lters frequently and replace when
TROUBLESHOOTING
If the unit fails to operate, check the following:
• Check the thermostat setting. Make sure the system
mode and temperature settings are correct.
• Check the electrical panel for tripped circuit breakers.
• Check the fi lters for dust accumulation.
• Check the unit and make sure it is clean and not covered
with grass or leaves.
• If the items above don’t resolve your problems, then
call your nearest service technician. Please specify
the complete model and serial numbers shown on the
furnace data label for all warranty service and when
ordering replacement parts or optional equipment. Refer
to the replacement parts list provided with the furnace
for part numbers.
Furnace Filter
WARNING:
Never operate the furnace without a fi lter in
place. Accumulating dust in the return air can
build up on internal components, resulting
in loss of effi ciency, equipment damage, and
possible fi re.
• E3 Furnaces are supplied with a single air fi lter when
shipped from the factory. It is recommended that the fi lter
be cleaned or replaced monthly. Newly built or recently
4
INSTALLER INFORMATION
IMPORTANT SAFETY INFORMATION
INSTALLER: Please read all instructions before servicing
this equipment. Pay attention to all safety warnings and
any other special notes highlighted in the manual. Safety
markings are used frequently throughout this manual to
designate a degree or level of seriousness and should not
be ignored. WARNING indicates a potentially hazardous
situation that if not avoided, could result in personal injury
or death. CAUTION indicates a potentially hazardous
situation that if not avoided, may result in minor or moderate
injury or property damage.
REQUIREMENTS & CODES
WARNING:
This unit must be installed in accordance
with instructions outlined in this manual
during the installation, service, and operation
of this unit. Unqualifi ed individuals should
not attempt to interpret these instructions or
install this equipment. Failure to follow safety
recommendations could result in possible
damage to the equipment, serious personal
injury or death.
• The installer must comply with all local codes and
regulations which govern the installation of this type
of equipment. Local codes and regulations take
precedence over any recommendations contained in
these instructions. Consult local building codes and the
National Electrical Code (NEC) for special installation
requirements.
• All electrical wiring must be completed in accordance
with local, state and national codes and regulations and
with the National Electric Code (ANSI/NFPA 70) or in
Canada the Canadian Electric Code (CSA Z240.6.1, &
Z240.9.1).
• Design and construction of the home duct system,
must be in accordance with: HUD Manufactured Home
Construction & Safety Standard (Title 24, Part 3280)
and American National Standards (ANSI) A119.11,
C1-NFPA 7
• Follow all precautions in the literature, on tags, and
on labels provided with the equipment. Read and
thoroughly understand the instructions provided with
the equipment prior to performing the installation and
operational checkout of the equipment.
• This air handler may not be used for temporary heating
of buildings or structures under construction.
Minimum Installation Clearances
• Access for positioning and servicing the unit must be
considered when locating unit. The need to provide
clearance for access to panels or doors may require
clearance distances over and above the requirements.
For alcove installations allow 18 (46cm) inches
minimum clearance from the front of the unit for
future servicing. Closet installations require 36
inches minimum.
• This appliance must be installed in accordance with
clearances listed in Table 1. The furnace must be installed
with ample clearance for easy access to the air fi lter,
blower assembly, burner assembly, controls, and vent
connections.
• Locate and install this unit in position as specifi ed on
page 8. This unit is designed only for Indoor installations
and should be located with consideration of minimizing
the length of the supply and return ducts. See Table 4
(page 15) or the rating plate for circulating airfl ow data.
• Suffi cient clearance for unobstructed airfl ow through a
louvered door must be maintained in order to achieve
rated performance. Air return to the furnace must have
the minimum required total free area:
200 in
2
(1290 cm2 ) for furnace only. May also include
return air grille and frame assembly P/N 902989 or wall
mount grille P/N 902999).
235 in
2
(1516 cm2 ) with 4 ton A.C. or H.P. installed.
250 in2. (1613 cm2 ) with 4 ton A.C. or H.P. installed &
1” special clearance.
390 in2 (2516 cm2 ) with up to 5 ton A.C. or H.P. installed.
Clearances to Combustible Materials
•
This furnace is Design Certifi ed in the U.S. and Canada
by CSA International for the minimum clearances to
combustible materials. NOTE: The furnace is listed for
installation on combustible or non-combustible fl ooring.
To obtain specifi c clearance information, refer to the
furnace rating plate, located inside of the furnace cabinet.
• 0” from all surfaces of furnace cabinet, ducts, optional
coil housing and plenum connector. No separate subbase
required for installations on combustible fl ooring.
ALL MODELS CLOSET ALCOVE
Front ** 6" 18"
Back 0" 0"
Sides* 0" 0"
To p 0 " 0 "
Top & Sides of Duct 0" 0"
Bottom of Duct 0" 0"
** Service Clearance
* For upfl ow application using upfl ow stand, 1” minimum per side.
Table 1. Minimum Clearance Requirements
5
CIRCULATING AIR REQUIREMENTS
WARNING:
All return ducts must be secured to the furnace
with sheet metal screws. All return ducts must be
adequately sealed. When return air is provided
through the bottom of the unit, the joint between
the furnace and the return air plenum must be
air tight.
Return air and circulating air ducts must not be
connected to any other heat producing device
such as a fi replace insert, stove, etc. This may
result in fi re, explosion, carbon monoxide
poisoning, personal injury, or property damage.
Plenums & Air Ducts
This unit is designed only for use with a supply and return
duct. Air ducts should be installed in accordance with the
standards of the National Fire Protection Association
Standard for Installation of Air Conditioning Systems
(NFPA 90A), Standard for Installation of Residence Type
Warm Air Heating and Air Conditioning Systems (NFPA
90B), and all applicable local codes. NFPA publications
are available by writing to: National Fire Protection
Association, Batterymarch Park, Quincy, ME 02269 or visit
www.NFPA.org on the web.
• Plenums and air ducts must be installed in accordance
with the Standard for the Installation of Air Conditioning
and Ventilating Systems (NFPA No. 90A) or the
Standard for the Installation of Warm Air Heating and
Air Conditioning Systems (NFPA No. 90B).
• Design the air ducts according to methods described
by the Air Conditioning Contractors of America (ACCA).
• Air ducts must be aluminum, tin plate, galvanized sheet
steel, or other approved materials for outlet or return air
ducts.
• Snap-Lock or Pittsburgh-Lock seams are preferred. All
other types of seams must be made tight to prevent
leakage.
• It is good practice to seal all connections and joints
with industrial grade sealing tape or liquid sealant.
Requirements for sealing ducts vary from region to
region. Consult with local codes for requirements specifi c
to your area.
• Gas piping must not run in or through any of the air duct
system.
• Applicable installation codes may limit the furnace to
installation in a single-story residence only. Furnace
installations other than closet or alcove require ducted
return air systems.
Return Air Connections
Air return to the furnace must have a minimum free area
opening (see Table 1). A return air grille for closet or alcove
installations is available. Acceptable closet installations
with return air entering through an opening in the fl oor
or ceiling of a closet, must meet all of the following
requirements:
• The return air opening, regardless of its location in the
closet, must not be smaller than size specifi ed on unit
data label. If located in the fl oor, the opening must be
provided with a means of preventing its inadvertent
closure by fl at object(s) placed over the opening.
• A return air grille must be used when furnace is installed
in a closet or alcove:
Alcove installations: use return air grille & frame assembly
P/N 902989 or equivalent. See Figure 2, page.
Closet installations: use wall mount return air grilled
P/N 902999 or equivalent. NOTE: For 5 ton A.C. or H.P.
system, 155 in
Downfl ow alcove installations: the grille (with frame
provided) may be attached to the top of the furnace and all
paneling and trim fl ushed to it. This installation provides
an access door for future installation of NORDYNE air
conditioning or heat pump coils on top of the furnace.
• Materials located in return air duct system must have
a fl ame-spread classifi cation of 200 or less.
• Noncombustible pans having 1” upturned fl anges must
be located beneath openings in a fl oor-return duct
system.
• Wiring materials located in return duct system must
conform to NEC Article 300-22(c).
• If return air opening is located below top of furnace, a
minimum clearance must be provided between opening
and furnace. See Table 1 (page 5).
Supply Air Connections
• Supply duct system must be designed for proper air
distribution. Static pressure measured externally to
furnace shall not exceed static pressure rating listed
on furnace nameplate.
• Duct system must be designed so that no supply registers
are located in duct system directly below the furnace.
Acoustical Ducts
Certain installations may require the use of acoustical
lining inside the supply duct work.
• Acoustical insulation must be in accordance with the
current revision of the Sheet Metal and Air Conditioning
Contractors National Association (SMACNA) application
standard for duct liners.
• Duct lining must be UL classifi ed batts or blankets with
a fi re hazard classifi cation of FHC-25/50 or less.
• Fiber duct work may be used in place of internal duct
liners if the fi ber duct work is in accordance with the
current revision of the SMACNA construction standard
on fi brous glass ducts. Fibrous duct work and internal
acoustical lining must be NFPA Class 1 air ducts when
tested per UL Standard 181 for Class 1 ducts.
2
(1,000 cm2 ) must be added.
6
Unconditioned Spaces
Frame
Top of
Furnace
Fasteners (4)
Grille
Furnace Filter
(not used with
A/C or H/P)
All duct work passing through unconditioned space must
be properly insulated to minimize duct losses and prevent
condensation. Use insulation with an outer vapor barrier.
Refer to local codes for insulation material requirements
Closed-Off Spaces
Living space not served by, and closed off from the return air
ducts to the furnace (by doors, sliding partitions, and other
means) must be provided with permanent, uncloseable
openings in the doors or partitions to allow air to return to
the furnace from all parts of the home. Return air grilles,
with a minimum open area of one square inch for every
fi ve square feet of living space closed off from the furnace,
must be provided in the door or room partition.
Figure 2. Grille Support Frame & Grille Assembly
Filtering Methods - Downfl ow Furnaces
Non-Ducted Return Air
For unducted return air systems, either the optional grille
and frame assembly or the optional wall mount grille is
recommended.
Without A/C or H/P uncased coil:
• Use the fi lter supplied with the furnace; ensure that
the fi lter is installed mat side down between the fi lter
retainer and furnace top. See Figure 2.
With A/C or H/P uncased coil:
• Use the optional coil fi lters; the fi lter supplied with the
furnace is not used; REMOVE AND DISCARD THIS
FILTER.
With optional coil housing:
• See coil cabinet instructions for specifi c fi ltering methods.
Ducted Return Air
For ducted return air systems with air conditioners or heat
pumps, either providing an access panel in the duct or
using the optional coil cabinet (Figure 3) is recommended.
The duct system must be properly sized to account for
any additional external static pressure produced from the
chosen fi ltering method.
Without optional coil housing:
• Install a fi lter with a minimum unrestricted medium area
of 324 in
2
in the duct above the coil that is accessible
for monthly cleaning or replacement by homeowner.
With optional coil housing:
• Install a fi lter with a minimum unrestricted medium area
of 324 in
2
in the duct above the coil that is accessible
for monthly cleaning or replacement by homeowner.
Filtering Methods - Upfl ow Furnaces
Non-Ducted Return Air
Furnaces may be installed with unducted or ducted return
air. For unducted systems with air conditioners or heat
pumps, the following optional equipment is recommended:
upfl ow stand, coil cabinet, upfl ow duct connector, and
wall mount grille.
20" (508 mm)
Cabinet
Insulation
29"
(737 mm)
23 3/4" (603 mm)
Figure 3. Upfl ow Coil Cabinet
Without optional upfl ow stand:
• Install a fi lter with a minimum unrestricted medium area
of 324 in
2
below the coil cabinet/furnace assembly that
is accessible for monthly cleaning or replacement by
the homeowner
With optional upfl ow stand:
• Stand (Figure 4, page 8) must use two fi lters: one is
supplied with the stand and the other MUST be removed
from the furnace and placed in the stand. See instructions
supplied with the upfl ow stand for additional details.
Ducted Return Air
For ducted systems with air conditioners or heat pumps,
the following optional equipment is recommended: coil
cabinet and upfl ow duct connector.
• Install a fi lter with a minimum unrestricted medium area
of 324 in2 below the coil cabinet/furnace assembly that
is accessible for monthly cleaning or replacement by
the homeowner
7
24 3/4” (628 mm)
20”
(508 mm)
20” (508 mm)
Upflow Stand
Figure 4. Optional Upfl ow Stand
FURNACE INSTALLATION
NOTE: Since all installations are different, the sequence of
these steps may differ from the actual installation. These
installation procedures are suggested for typical furnace
installations. Only qualifi ed HVAC technicians should
install this furnace.
General Information
The E3 Electric furnace is designed only for indoor
installations and can be readily connected to the high
static duct system of a home. Units are approved for single/
multistory residential or mobile/modular/manufactured
structures in upfl ow, downfl ow, (freestanding/closet/
alcove) confi gurations.
This appliance will provide many years of safe and
dependable comfort, providing it is properly installed
and maintained. Abuse, improper use, and/or improper
maintenance can shorten the life of the appliance and
create unsafe hazards. Please read all instructions before
installing the unit.
Approved installation, operation, and maintenance of
this appliance must be in accordance with the listed
specifi cations contained in these instructions and other
documents supplied with the furnace and/or optional air
conditioning equipment. Unless it is noted differently in this
manual, only use factory authorized kits and accessories
when modifying this appliance. Refer to local authorities
having jurisdiction for further information.
local building codes. If there is any question concerning
the power supply, contact the local power company.
Verify the air delivery of the furnace is adequate to
handle the static pressure drop of the coil, fi lter, and
duct work.
Locating the Unit
• Survey the job site to determine the best location for
installing the unit. Consideration should be given to
availability of electric power, service access, and noise.
• The dimensions of the room or alcove must be able
to accommodate the overall size of the unit and the
installation clearances in Table 1 (page 5). Physical
dimensions for this furnace are shown in Figure 21
(page 18). If an upfl ow stand will be used, see Figure
22 for component dimensions.
• The unit must be leveled at installation and attached to
a properly installed duct system.
• The surface that the furnace is mounted on must provide
sound physical support of the unit.
Optional Equipment
NOTE: Refer to the instructions supplied with any additional
accessories for further installation details.
Return Air Grille
A return air grille and frame assembly (Figure 2, page
7) is available for use in unducted return air installations.
In downfl ow alcove installations, the grille and frame
assembly may be mounted directly to the top of the furnace.
In closet installations, a wall mount grille is available for
attachment to a door or wall.
Optional Automatic Furnace Damper (901083)
Furnace may be equipped with the optional automatic
damper when a packaged air conditioner is installed and
connected to the warm air duct system. This damper (not
required) prevents cooled air from discharging through
the furnace cabinet, causing excessive cooling of the
immediate area. Refer to the instructions supplied with
the damper for details.
Duct Connectors for Downfl ow Systems
Duct connectors are recommended for heated air
distribution in under-the-fl oor duct systems. With this
system, furnaces may be installed on combustible fl ooring
without a separate sub-base. The furnace rear mounting
plate (Figure 8, page 10) supplied with the duct connectors
is recommended for use with this type of installation.
Before You Install this Furnace
This equipment is securely packaged at the time of
shipment and upon arrival should be carefully inspected
for damage prior to installing the equipment at the job
site. Claims for damage (apparent or concealed) should
be fi led immediately with the carrier.
Check the electrical supply and verify the power supply
is adequate for unit operation. The system must be wired
and provided with circuit protection in accordance with
8
REAR WALL OF CLOSET OR ALCOVE
1 3/4" MIN.
REAR WALL OF CLOSET OR ALCOVE
2 3/8" MIN.
23 3/4"
OPTIONAL
REFRIGERANT LINE
3 1/8” X 5 3/4”
23 3/4"
FLOOR CUT-OUT
17 1/2” X 14”
18 5/8"
FOR UPFLOW
FURNACES WITH
STD. DUCT
CONNECTORS
C
L
3”
10"
20"
STANDARD DUCT CONNECTOR
REAR WALL OF CLOSET OR ALCOVE
1 3/4"
MIN.
FLOOR CUT-OUT
14 1/4” DIAMETER
FOR UPFLOW
18 5/8"
FURNACES WITH
ROUND DUCT
CONNECTORS
C
L
FURNACE OUTLINE
3/4"
FURNACE
DOOR
FURNACE OUTLINE
3/4"
23 3/4"
OPTIONAL
REFRIGERANT LINE
4 1/4” X 3 3/4”
23 3/4"
FLOOR CUT-OUT
14 1/2” X 14 1/2”
17"
FOR DOWNFLOW
FURNACES WITH
STD. DUCT
CONNECTORS
C
L
5”
10"
20"
3 3/8”
STANDARD DUCT CONNECTOR
REAR WALL OF CLOSET OR ALCOVE
2 3/8"
MIN.
FLOOR CUT-OUT
17"
14 1/4” DIAMETER
FOR DOWNFLOW
FURNACES WITH
ROUND DUCT
CONNECTORS
C
L
16 5/8"
FURNACE OUTLINE
OPTIONAL SUPPLY
WIRE ENTRANCE
3” X 6 1/4”
3/4"
FURNACE
DOOR
16 5/8"
FURNACE OUTLINE
OPTIONAL SUPPLY
WIRE ENTRANCE
3” X 6 1/4”
3/4"
OPTIONAL
REFRIGERANT LINE
3 1/8” X 5 3/4”
10"
3”
FURNACE
20"
DOOR
ROUND DUCT CONNECTOR
Figure 5. Cut-Out Dimensions for Upfl ow
Furnaces
Locating & Cutting Floor Openings
Floor cut-outs must be carefully located to avoid
misalignment of the furnace and air duct. Standard and
round cutouts for upfl ow furnaces are shown in Figure
5. Figure 6 displays the cutouts for downfl ow furnaces.
1. Measure and mark the centerline of the cutout. Provide
minimum clearances at rear and right side walls of
closet or alcove for installation of furnace and wiring.
2. Using the centerline as a starting point, draw the rest
of the duct cut-out to the dimensions shown in Figures
5 or 6. NOTE: Additional provisions may be necessary
for optional air conditioning or heat pump if refrigerant
lines are installed elsewhere than at the front of the
furnace. The refrigerant and entrance supply opening
dimensions may be adjusted ± 1/2”.
3. Cut out the fl oor opening 1/16” larger than the actual
cutout drawn. This will allow some clearance when
installing the duct connector.
OPTIONAL
REFRIGERANT LINE
4 1/4” X 3 3/4”
5”
10"
20"
3 3/8”
FURNACE
DOOR
ROUND DUCT CONNECTOR
Figure 6. Cut-Out Dimensions for Downfl ow
Furnaces
4. Measure from the top of the fl oor down to the top of the
supply air duct to obtain the depth of the fl oor cavity.
NOTE: The depth of the fl oor cavity shown as “X” in
Figure 7 will determine the correct duct connector.
5. Determine which duct connector to use from Table 2
(page 10).
FLOOR OPENING
“X”
SUPPLY AIR DUCT
FLOOR
CAVITY
Figure 7. Floor Cavity
9
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