Trane TUH2B060A9V3VA, TUH2B080A9V3VA, TUH2B080A9V4VA, TUH2C100A9V4VA, TUH2C100A9V5VA Installer's Manual
...
18- CD26D1- 1
0
Available in French Canadian (FC)
Installer’s Guide
Upflow / Horizontal and Downflow / Horizontal,
Gas-Fired, Direct Vent, 2-Stage Condensing
Furnaces with Variable Speed Inducer
*UH2B060A9V3VA
*UH2B080A9V3VA
*UH2B080A9V4VA
*UH2C100A9V4VA
*__First letter may be “A” or “T”
ALL phases of this installation must comply with NATIONAL, STATE AND LOCAL CODES
IMPORTANT — This Document is customer property and is to remain with this unit.
Please return to service information pack upon completion of work.
*UH2
UPFLOW
*UH2C100A9V5VA
*UH2D120A9V5VA
*DH2B060A9V3VA
*DH2B080A9V3VA
*DH2
*DH2B080A9V4VA
*DH2C100A9V4VA
*DH2D120A9V5VA
DOWNFLOW
UPFLOW/HORIZONTAL
© 2010 Trane All Rights Reserved
DOWNFLOW/HORIZONTAL
Figure 1
A341624P11
Installer’s Guide
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WARNING
CARBON MONOXIDE POISONING HAZARD
Failure to follow the steps outlined below for each
appliance connected to the venting system being
placed into operation could result in carbon monoxide
poisoning or death.
The following steps shall be followed for each appliance
connected to the venting system being placed into
operation, while all other appliances connected to the
venting system are not in operation:
1. Seal any unused openings in the venting system.
2. Inspect the venting system for proper size and
horizontal pitch, as required in the National Fuel Gas
Code, ANSI Z223.1/NFPA 54 or the CSA B149.1
Natural Gas and Propane Installation Code and these
instructions. Determine that there is no blockage or
restriction, leakage, corrosion and other deficiencies
which could cause an unsafe condition.
3. As far as practical, close all building doors and
windows and all doors between the space in which the
appliance(s) connected to the venting system are
located and other deficiencies which could cause an
unsafe condition.
4. Close fireplace dampers.
5. Turn on clothes dryers and any appliance not
connected to the venting system. Turn on any exhaust
fans, such as range hoods and bathroom exhausts, so
they are operating at maximum speed. Do not operate
a summer exhaust fan.
6. Follow the lighting instructions. Place the appliance
being inspected into operation. Adjust the thermostat
so appliance is operating continuously.
7. Test for spillage from draft hood equipped appliances
at the draft hood relief opening after 5 minutes of main
burner operation. Use the flame of a match or candle.
8. If improper venting is observed during any of the above
tests, the venting system must be corrected in
accordance with the National Fuel Gas Code,
ANSI Z221.1/NFPA 54 and/or CSA B149.1 Natural
Gas and Propane Installation Code.
9. After it has been determined that each appliance
connected to the venting system properly vents where
when tested as outlined above, return doors, windows,
exhaust fans, fireplace dampers and any other gas-fired
burning appliance to their previous condition of use.
!
CAUTION
To prevent shortening its service life, the Furnace should not
be used as a “Construction Heater” during the finishing
phases of construction until the requirements listed in item
9, a-g of the safety section of this publication have been met.
Condensate in the presence of chlorides and fluorides from
paint, varnish, stains, adhesives, cleaning compounds, and
cement create a corrosive condition which may cause rapid
deterioration of the heat exchanger.
!
WARNING
FIRE & EXPLOSIVE HAZARD. DO NOT USE SEMI-RIGID
METALLIC GAS CONNECTORS (FLEXIBLE GAS LINES)
WITHIN THE FURNACE CABINET.
FAILURE TO FOLLOW THIS WARNING COULD RESULT IN
PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.
2 18-CD26D1-10
SAFETY SECTION
!
WARNING
Failure to follow safety warnings exactly, could result
in a fire or explosion causing property damage,
personal injury or loss of life.
— Do not store or use gasoline or other flammable
vapors and liquids 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.
— Installation and service must be performed by
a qualified installer, service agency or the gas
supplier.
!
WARNING
FIRE OR EXPLOSION HAZARD
FAILURE TO FOLLOW THE SAFETY WARNINGS EXACT LY
COULD RESULT IN SERIOUS INJURY, DEATH OR PROPERTY DAMAGE.
IMPROPER SERVICING COULD RESULT IN DANGEROUS
OPERATION, SERIOUS INJURY, DEATH, OR PROPERTY
DAMAGE.
!
WARNING
▲
AZARD OF EXPLOSION!
EVER USE AN OPEN FLAME TO DETECT GAS LEAKS.
XPLOSIVE CONDITIONS MAY OCCUR. USE A LEAK TEST
OLUTION OR OTHER APPROVED METHODS FOR LEAK
ESTING. FAILURE TO FOLLOW RECOMMENDED SAFE LEA
EST PROCEDURES COULD RESULT IN DEATH OR SERIOU
NJURY OR EQUIPMENT OR PROPERTY-ONLY-DAMAGE.
!
WARNING
SAFETY HAZARD
THIS INFORMA TION IS INTENDED FOR USE BY INDIVIDUALS POSSESSING ADEQUATE BACKGROUNDS OF
ELECTRICAL AND MECHANICAL EXPERIENCE. ANY
ATTEMPT TO REPAIR A CENTRAL AIR CONDITIONING
PRODUCT MAY RESULT IN PERSONAL INJURY AND OR
PROPERTY DAMAGE. THE MANUFACTURER OR SELLER
CANNOT BE RESPONSIBLE FOR THE INTERPRET ATION OF
THIS INFORMATION, NOR CAN IT ASSUME ANY LIABILITY
IN CONNECTION WITH ITS USE.
!
CAUTION
Sharp Edge Hazard. Be careful of sharp edges on equipment or any cuts made on sheet metal while installing or
servicing. Personal injury may result.
Installer’s Guide
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The following warning complies with State of California law, Proposition 65
!
WARNING
This product contains fiberglass wool insulation!
Fiberglass dust and ceramic fibers are believed by the
State of California to cause cancer through inhalation.
Glasswool fibers may also cause respiratory, skin, or
eye irritation.
PRECAUTIONARY MEASURES
●
Avoid breathing fiberglass dust.
●
Use a NIOSH approved dust/mist respirator.
●
Avoid contact with the skin or eyes. Wear long-sleeved,
loose-fitting clothing, gloves, and eye protection.
●
Wash clothes separately from other clothing: rinse
washer thoroughly.
●
Operations such as sawing, blowing, tear-out, and
spraying may generate fiber concentrations requiring
additional respiratory protection. Use the appropriate
NIOSH approved respirator in these situations.
FIRST AID MEASURES
Eye Contact – Flush eyes with water to remove dust.
Skin Contact – Wash affected areas gently with soap
If symptoms persist, seek medical
attention.
and warm water after handling.
Careful consideration must be taken in the installation
process to avoid personal injury, property damage or equipment damage. These instructions do not cover all variations
in systems or provide for every possible contingency. Should
further information be desired or particular problems arise
which are not covered sufficiently by this manual, contact your
local distributor or the manufacturer as listed on the Furnace
nameplate.
In addition, these Furnaces are suitable for installation in an
attic, garage or crawl space with ducted supply and return air.
Safety signal words are used to designate a degree or level of
seriousness associated with a particular hazard. The signal
words for safety markings are WARNING, and CAUTION.
a. WARNING indicates a potentially hazardous situation
which, if not avoided, could result in death or serious
injury.
b. CAUTION indicates a potentially hazardous situation
which, if not avoided, may result in minor or moderate
injury. It is also used to alert against unsafe practices
and hazards involving only property damage.
!
WARNING
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WARNING EXPLOSION HAZARD
PROPANE GAS IS HEAVIER THAN AIR AND MAY
COLLECT IN ANY LOW AREAS OR CONFINED SPACES.
IN ADDITION, ODORANT FADE MAY MAKE THE GAS
UNDETECTABLE EXCEPT WITH A WARNING DEVICE. IF
THE GAS FURNACE IS INSTALLED IN A BASEMENT, AN
EXCAVATED AREA OR A CONFINED SPACE, IT IS
STRONGLY RECOMMENDED TO CONTACT A GAS
SUPPLIER TO INSTALL A GAS DETECTING WARNING
DEVICE IN CASE OF A GAS LEAK. THE
MANUFACTURER OF YOUR FURNACE DOES NOT TEST
ANY DETECTORS AND MAKES NO REPRESENTATIONS
REGARDING ANY BRAND OR TYPE OF DETECTOR.
18-CD26D1-10 3
Installer’s Guide
The following safety practices and precautions must be
followed during the installation, servicing, and operation of
this Furnace.
1. Use only with the type of gas approved for this Furnace.
Refer to the Furnace rating plate.
2. Install this Furnace only in a location and position as
specified in “Location and Clearances” (page 5) of these
instructions.
3. Provide adequate combustion and ventilation air to the
Furnace space as specified in “Air for Combustion and
Ventilation” (page 9), of these instructions.
4. Combustion products must be discharged outdoors.
Connect this Furnace to an approved vent system only, as
specified in the “Venting” section (page 15), of these
instructions.
5. 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 the “Gas Piping” section of these instructions
on page 31.
6. Always install the 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 on the unit rating plate.
Airflow with temperature rise for cfm versus static is
shown in the Service Facts accompanying this Furnace.
7. 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 a duct(s) sealed to the Furnace casing and
terminating outside the space containing the Furnace.
8. A gas-fired Furnace for installation in a residential
garage must be installed as specified in “Location and
Clearances” section (page 5) , of these instructions.
9. The Furnace may be used for temporary heating of
buildings or structures under construction
following conditions have been met:
a. The Furnace venting system must be complete and
installed per manufacturers instructions.
b. The Furnace is controlled only by a room Comfort
Control (no field jumpers).
c. The Furnace return air duct must be complete and
sealed to the Furnace.
d. The Furnace input rate and temperature rise must
be verified to be within nameplate marking.
e. 100% of the Furnace combustion air requirement
must come from outside the structure.
f. The Furnace return air temperature range is between 550 and 800 Fahrenheit.
g. Clean the 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
manufacturer's instructions.
10. This product must be gas piped by a Licensed Plumber or
Gas Fitter in the Commonwealth of Massachusetts.
only when the
Contents
Safety Section 2
Installation Instructions 5
General 5
Location and Clearances 5
Outline Drawings 6
Upflow Installation 8
Downflow Installation 8
Horizontal Installation 8
Air For Combustion and Ventilation 9
Duct Connections 10
Return Air Filters 11
General Venting 15
Vent Tables 19
Horizontal Venting 20
Horizontal Venting Through a Wall 21
Venting Through The Roof 23
Venting Routed Through a Masonry Chimney 24
Downward Venting 26
Condensate Drain Instructions 27
Gas Piping 32
Combustion and Input Check 32
High Altitude Derate 35
Electrical Connections 36
Field Wiring Diagrams 36
Start-up and Adjustment 41
Preliminary Inspections 41
Lighting Instructions 41
Sequence of Operation 41
Control and Safety Switch Adjustments 42
Conditions Affecting System Operation 43
IFC Error Flash Codes 44
4 18-CD26D1-10
Installer’s Guide
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GENERAL INSTALLATION INSTRUCTIONS
The manufacturer assumes no responsibility for equipment
installed in violation of any code or regulation.
It is recommended that Manual J of the Air Conditioning
Contractors Association (ACCA) or A.R.I. 230 be followed in
estimating heating requirements. When estimating heating
requirements for installation at Altitudes above 2000 ft.,
remember the gas input must be reduced (See combustion
and input check page 31).
Material in this shipment has been inspected at the
factory and released to the transportation agency
without known damage. Inspect exterior of carton for
evidence of rough handling in shipment. Unpack
carefully after moving equipment to approximate
location. If damage to contents is found, report the
damage immediately to the delivering agency.
Codes and local utility requirements governing the installation of gas fired equipment, wiring, plumbing, and flue
connections must be adhered to. In the absence of local codes,
the installation must conform with latest edition of the
National Fuel Gas Code ANSI Z223.1• National Installation
Code, CAN/CGA B149.1. The latest code may be obtained
from the American Gas Association Laboratories, 400 N.
Capitol St. NW, Washington D.C. 20001.
1-800-699-9277 or www.aga.org.
These Furnaces have been classified as CATEGORY IV
furnaces in accordance with latest edition of ANSI Z21.47
standards • CSA 2.3. Category IV furnaces operate with
positive vent static pressure and with a flue loss less than 17
percent. These conditions require special venting systems,
which must be gas tight and water tight. These Category IV
Direct Vent Furnaces are approved for installation in Manufactured/ Mobile housing when used with BAYMFGH001A.
LOCATION AND CLEARANCES
4. Are there at least 3 inches of clearance between the
Furnace combustion air openings in the front panel and
any closed panel or door provided?
5. Are the ventilation and combustion air openings large
enough and will they remain unobstructed? If outside air
is used, are the openings set 12" above the highest snow
accumulation level (18" minimum in Canadian applications)?
6. Allow sufficient height in supply plenum above the
Furnace to provide for cooling coil installation, if the
cooling coil is not installed at the time of this Furnace
installation.
IMPORTANT: The Furnace must be installed level.
The only allowable variation would be slightly to
the left and/ or forward in upflow installations or
slightly toward the front in horizontal installations.
This is necessary for proper condensate drainage.
7. A Furnace shall be installed so electrical components are
protected from water.
8. If the Furnace is installed in a garage, it must be
installed so that the burners, and the ignition source are
located not less than 18 inches above the floor and the
Furnace must be located or protected to avoid physical
damage from vehicles.
!
WARNING
FIRE HAZARD. DO NOT INST ALL THE FURNACE DIRECTLY
ON CARPETING, TILE OR OTHER COMBUSTIBLE MA TERIAL OTHER THAN WOOD FLOORING.
!
CAUTION
Do NOT install the Furnace in a corrosive or contaminated
atmosphere.
Failure to follow this caution could result in early equipment
failure.
The location of the Furnace is normally selected by the
architect, the builder, or the installer. However, before the
Furnace is moved into place, be sure to consider the following
requirements:
1. Is the location selected as near the chimney or vent and
as centralized for heat distribution as practical?
2. Do all clearances between the Furnace and enclosure
equal or exceed the minimums stated in Clearance Table
on the Outline Drawings?
3. Is there sufficient space for servicing the Furnace and
other equipment? A minimum of 24 inches front accessibility to the Furnace must be provided. Any access door
or panel must permit removal of the largest component.
18-CD26D1-10 5
Installer’s Guide
Figure 2. Upflow Outline Drawing
6 18-CD26D1-10
Installer’s Guide
Figure 3. Downflow Outline Drawing
18-CD26D1-10 7
Installer’s Guide
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S
)
S
4)
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
INSTALLATION INSTRUCTIONS
!
WARNING
FIRE HAZARD. DO NOT INST ALL THE FURNACE DIRECTLY
ON CARPETING, TILE OR OTHER COMBUSTIBLE MA TERIAL OTHER THAN WOOD FLOORING. FOR VERTICAL
DOWNFLOW APPLICA TION, SUBBASE (BAYBASE205)
MUST BE USED BETWEEN THE FURNACE AND COMBUSTIBLE FLOORING. WHEN THE DOWNFLOW FURNACE IS
INSTALLED VERTICALLY WITH A CASED COIL, A SUBBASE IS NOT REQUIRED.
The bottom panel of the upflow furnace must be removed for
bottom return air.
Remove the filter and lay the furnace on its back. Remove the
two 5/16" hex screws securing the bottom front channel to the
cabinet. Lower the front edge of the bottom front channel and
pull forward to remove the channel. The bottom return air
panel will now easily slide out of the cabinet. Reinstall the
bottom front channel and filter for upflow bottom return
installations.
UPFLOW INSTALLATION
Standoffs and screws (See Figure 4) are included with the
cased coils for attachment to the Furnace. There are clearance alignment holes near the bottom of the coil wrapper.
Drill screws are used to engage the Furnace top flanges. The
standoff is inserted into the cabinet alignment hole. The drill
screws are inserted through the standoffs then screwed into
the Furnace flange. The coil is always placed downstream of
the Furnace airflow. The above instructions apply only if the
coil is on top of an upflow Furnace
FOR VERTICAL
CASED
UPFLOW
FURNACE
COIL
STANDOFFS
(BOTH SIDES)
TANDOFFS (4)
SCREW
(BOTH SIDES
Figure 4
DOWNFLOW INST ALLATION
Figure 5
MINIMUM CLEARANCE FROM COMBUSTIBLE MATERIALS FOR
UPFLOW/HORIZONTAL AND DOWNFLOW/ HORIZONTAL FURNACES
FURNACE SURFACE
SIDES 0" 1" 0"
BACK 0" 3" 6"
TOP 1" 1" 1"
FRONT 3" 3" 18"
VENT 0" 0" 0"
: CLEARANCE REQUIRED AT TOP OF PLENUM IS 1"
NOTE
8 18-CD26D1-10
VERTICAL
CLOSET
Table 2
DRILL SCREWS (
UNIT LOCATION
HORIZONTAL
CLOSET
Table 1 Required floor opening: (DOWNFLOW)
CABINET
WIDTH
RETURN
DUCT WIDTH
17-1/2" 16-1/4" 16-5/8" 20-1/8" 15-5/8" 19-3/8"
21" 19-3/4" 20-1/8" 20-1/8" 19-1/8" 19-3/8"
24-1/2" 23-1/4" 23-5/8" 20-1/8" 22-5/8" 19-3/8"
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FURNACE
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FRONT
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FLOOR OPENING PLENUM OPENING
"A" "B" "C" "D"
A (width)
B (depth)
D
C
Figure 6
HORIZONTAL INSTALLATION
The coil and Furnace must be fully supported when used in
the horizontal position. It is always recommended that an
auxiliary drain pan be installed under a horizontally installed evaporator coil or 90% Gas Furnace. Connect the
auxiliary drain line to a separate drain line (no trap is needed
in this line).
Three brackets (with screws) are included with downflow
furnaces for installtion to stabilize and secure the 2/4TXC
cased coil in the horizontal position. See Figure 8.
The cased coil is secured to the Furnace. The brackets mount
using the rear screws on the coil case. Use the screws provided
to secure the bracket to the Furnace. The remaining bracket
is placed as close to horizontal center as possible between the
coil and the Furnace, converted to horizontal, aligns and
attaches to the TXC coil.
The Furnace and the cased coil must be properly supported.
The Furnace may be installed in an attic or crawl space in the
horizontal position by placing the Furnace on the left side (as
viewed from the front in the vertical position). The horizontal
Furnace installation in an attic should be on a service
platform large enough to allow for proper clearances on all
sides and service access to the front of the Furnace (See
Figure 6 & Table 1). Line contact is only permissible between
lines formed by intersections of the top and two sides of the
furnace casing and building joists, studs, or framing.
The Furnace may be placed horizontally in a crawl space on a
pad or other noncombustible material which will raise the
unit for sufficient protection from moisture.
The Furnace must be supported at both ends and the
middle when installed horizontally. The Furnace must
also be elevated approximately 4-6 inches to allow
clearance for the condensate drain to exit the cabinet in
the horizontal position.
IMPORTANT:
The 2/4TXC cased coil must
HORIZONTAL
ALCOVE / ATTIC
be placed downstream of the
furnace. In horizontal installations, the apex of the coil
may point either toward or
away from the furnace. See
the 2/4TXC coil Installer's
Guide for more details.
The horizontal Furnace may also be suspended from the
E
.
▲
joists using all-thread rods with a substantial metal support
frame that supports the entire length of the furnace. The
rods need to be of sufficient length to allow for proper clearances from combustible materials. The frame needs to be at
least 32" in length to allow for access to service panels.
If the Furnace is suspended using steel strap, it must be
supported at all four corners and in the middle at the front of
the Furnace.
UPFLOW/
HORIZONTAL
SHOWN WITH
DIRECT VENT
Figure 7
CASED COIL CONNECTION
BRACKET FOR DOWNFLOW
FURNACE IN HORIZONTAL
DOWNFLOW ONLY
Figure 8
AIR FOR COMBUSTION AND VENTILATION
The following warning complies with State of California law, Proposition 65
!
WARNING
HAZARDOUS GASES!
EXPOSURE TO FUEL SUBSTANCES OR BY-PRODUCTS
OF INCOMPLETE FUEL COMBUSTION IS BELIEVED BY
THE STATE OF CALIFORNIA TO CAUSE CANCER,
BIRTH DEFECTS, OR OTHER REPRODUCTIVE HARM.
Adequate flow of combustion and ventilating air must not be
obstructed from reaching the Furnace. Air openings provided
in the Furnace casing must be kept free of obstructions which
restrict the flow of air. Airflow restrictions affect the efficiency
and safe operation of the Furnace. Keep this in mind should
you choose to remodel or change the area which contains your
Furnace. Furnaces must have a free flow of air for proper
performance.
Provisions for combustion and ventilation air shall be made
in accordance with “latest edition” of Section 5.3, Air for
Combustion and Ventilation, of the National Fuel Gas Code,
ANSI Z223.1, or Sections 7.2, 7.3 or 7.4 of CSA B149.1
Installation Codes, and applicable provisions of the local
building codes. Special conditions created by mechanical
exhausting of air and fireplaces must be considered to avoid
unsatisfactory Furnace operation.
UNCONFINED
50 CU. FT. OR MORE
PER 1000 BTU/ HR. INPUT
ALL EQUIP. INSTALLED
Figure 9
Furnace locations may be in a confined space (see Figure 10)
or an unconfined space (See Figure 9).
Installer’s Guide
Table 3
MINIMUM AREA IN SQUARE FEET
FOR UNCONFINED SPACE INSTALLATIONS
FURNACE
MAXIMUM BTUH
INPUT RATING
60,000
80,000
100,000
120,000
140,000
Unconfined space is defined in Table 3 and Figure 9. These
spaces may have adequate air by infiltration to provide air
for combustion, ventilation, and dilution of flue gases.
Buildings with tight construction (for example, weather
stripping, heavily insulated, caulked, vapor barrier, etc.), may
need additional air provided as described for confined space.
1.
All air from inside the building as in Figure 11: The con-
fined space shall be provided with two permanent
openings communicating directly with an additional
room(s) of sufficient volume so that the combined volume
of all spaces meets the criteria for an unconfined space.
The total input of all gas utilization equipment installed
in the combined space shall be considered in making this
determination. Refer to Table 4, for minimum open
areas required.
2.
All air from outdoors as in Figure 12: The confined space
shall be provided with two permanent openings, one
commencing within 12 inches of the top and one commencing within 12 inches of the bottom of the enclosure.
The openings shall communicate directly, or by ducts,
with the outdoors or spaces (crawl or attic) that freely
communicate with the outdoors. Refer to Table 4, for
minimum open areas required.
CONFINED
LESS THAN 50 CU. FT.
PER 1000 BTU/HR. INPUT
ALL EQUIP INSTALLED
MINIMUM FREE AREA IN SQUARE INCHES
EACH OPENING (FURNACE ONLY)
Furnace
Maximum
BTUH/INPUT
Rating
60,000
80,000
100,000
120,000
140,000
Confined spaces are installations with less than 50 cu. ft. of
space per 1000 BTU/ hr input from all equipment installed.
Confined space is defined in Figure 10. Air for combustion
and ventilation requirements can be supplied from inside the
building as in Figure 11 or from the outdoors, as in Figure 12.
3. The following types of installations will require use of
OUTDOOR AIR for combustion, due to chemical
exposures:
* Commercial buildings
* Buildings with indoor pools
* Furnaces installed in commercial laundry rooms
* Furnaces installed in hobby or craft rooms
From
Inside
WITH 8 FT. CEILING
MINIMUM AREA IN SQUARE
FEET OF UNCONFINED SPAC
375
500
625
750
875
Figure 10
Table 4
Air
100
100
100
120
140
Air From Outside
Vertical
Duct
15
20
25
30
35
Horizontal
Duct
30
40
50
60
70
18-CD26D1-10 9
Installer’s Guide
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* Furnaces installed near chemical storage areas.
Exposure to the following substances in the combus-
tion air supply will also require OUTDOOR AIR for
combustion:
* Permanent wave solutions
* Chlorinated waxes and cleaners
* Chlorine based swimming pool chemicals
* Water softening chemicals
* Deicing salts or chemicals
* Carbon Tetrachloride
* Halogen type refrigerants
* Cleaning solvents (such as perchloroethylene)
* Printing inks, paint removers, varnish, etc.
* Hydrochloric acid
* Cements and glues
* Antistatic fabric softeners for clothes dryers
* Masonry acid washing materials
NOTE: Extended warranties are not available in some
instances. Extended warranty does not cover repairs to
equipment installed in establishments with corrosive
atmospheres, including but limited to, dry cleaners, beauty
shops, and printing facilities.
DUCT CONNECTIONS
Figure 11
!
CAUTION
▲
SAFETY HAZARD
Sharp Edge Hazard. Be careful of sharp edges on equipment or any cuts made on sheet metal while installing or
servicing. Personal injury may result.
Air duct systems should be installed in accordance with
standards for air conditioning systems, National Fire
Protection Association Pamphlet No. 90. They should be
sized in accordance with ACCA Manual D.
Central Furnaces, when used in connection with cooling units,
shall be installed in parallel or on the upstream side of the
cooling coil to avoid condensation in the heat exchanger. With a
parallel flow arrangement, the dampers or other means used to
control flow of air shall be adequate to prevent chilled air from
entering the Furnace, and if manually operated, must be
equipped with means to prevent operation of either unit unless
the damper is in full heat or cool position.
Flexible connections of nonflammable material may be used for
return air and discharge connections to reduce the transmission
of vibration. Though these units have been specifically designed
for quiet, vibration free operation, air ducts can act as sounding
boards and could, if poorly installed, result in vibration to the
annoyance level.
When the Furnace is located in a utility room adjacent to the
living area, the system should be carefully designed with
returns to minimize noise transmission through the return
air grille. Although these Furnaces are designed with large
blowers operating at moderate speeds, any blower moving a
high volume of air will produce audible noise which could be
objectionable when the unit is located very close to a living
area. It is often advisable to route the return air ducts under
the floor or through the attic. Such design permits the
installation of air return remote from the living area (i.e.
central hall).
When the Furnace is installed so that the supply ducts carry
air circulated by the Furnace to areas outside the space
containing the Furnace, the return air shall also be handled
by a duct(s) sealed to the Furnace and terminating outside
the space containing the Furnace.
Figure 12
10 18-CD26D1-10
Installer’s Guide
Where there is no complete return duct system, the
return connection must be run full size from the Furnace to a location outside the utility room, basement,
attic, or crawl space.
Do Not install return air through the back of the Furnace
cabinet.
Carbon monoxide, fire or smoke can cause serious bodily
injury, death, and/or property damage.
A variety of potential sources of carbon monoxide can be found
in a building or dwelling such as gas-fired clothes dryers, gas
cooking stoves, water heaters, furnaces and fireplaces. The
U.S. Consumer Product Safety Commission recommends
that users of gas-burning appliances install carbon monoxide
detectors as well as fire and smoke detectors per the manufactures installation instructions to help alert dwelling
occupants of the presence of fire, smoke or unsafe levels of
carbon monoxide. These devices should be listed by Underwriters Laboratories, Inc. Standards for Single and Multiple
Station Carbon Monoxide Alarms, UL 2034 or CSA International Standard, Residential Carbon Monoxide Alarming
Devices, CSA 6.19.
NOTE: The manufacturer of your Furnace DOES NOT test
any detectors and makes no representations regarding any
brand or type of detector.
All return air duct systems should provide for installation of
return air filters.
PREPARATION FOR UPFLOW BO TTOM AND SIDE RETURN
AIR FILTER INST ALLATION
All return air duct systems should provide for installation of
return air filters.
1. Determine the appropriate position to set the furnace in
order to existing supply and return ductwork.
2. The return air filter and rack are shipped in either the
bottom or side location. Remove the filter and filter rack
by first turning the two latches on the blower door and
tilting the door forward to remove. Remove the filter by
sliding it out of the rack. Compress the spring loaded
filter rack to disengage the retaining pins/screws from
the furnace sides and slide the filter rack out.
The filter rails are spring loaded for automatic adjustment to allow standard size, locally obtainable replacement filters. The filter rack itself slides to adjust to the
required width needed for bottom or side return (See
Figure 15).
3. For upflow side return installations, remove the insulation
around the opening in the blower compartment.
4. The side panels of the upflow furnace include locating
notches that are used as guides for cutting an opening for
return air, refer to Figure 13 and the outline drawing on
page 6 for duct connection dimensions for various
furnaces.
5. If a 3/4" flange is to be used for attaching the air inlet
duct, add to cut where indicated by dotted lines in
Figure 13. Cut corners diagonally and bend outward to
form flange.
6. If flanges are not required, and a filter frame is installed,
cut between locating notches (See Figure 13).
7. The bottom panel of the upflow furnace must be removed
for bottom return air. After removing the filter and filter
rack, lay the furnace on its back. Remove the two 5/16"
hex screws securing the front of the bottom channel to the
cabinet. Rotate the channel downward (or remove by
lowering the front edge of the channel and pulling
forward).
Slide the bottom return air panel out of the cabinet.
Rotate the front channel to its original position and
reinstall the two 5/16” screws.
8. The horizontal installation of the upflow furnace
requires an external filter section. Do NOT use the
bottom return filter within the furnace. Filter kits
are available for horizontal applications.
9. Connect duct work to furnace. See Outline Drawing for
supply and return duct size and location. Flexible duct
connectors are recommended to connect both supply and
return air ducts to the furnace. If only the front of the
furnace is accessible, it is recommended that both supply
and return air plenums are removable.
Return Air Filters
TYPICAL UPFLOW RETURN AIR FILTER INSTALLATIONS
Filters are factory supplied for these furnaces. These furnaces require high velocity type air filters. The filters may be
installed within the furnace blower compartment for UPFLOW furnaces in either a BOTTOM or SIDE (left side or
right side) return air inlet. Some filters may need to be
trimmed for side or bottom filter use.
Table 5
MODELS
NUMBERS
*UH2B060A9V3VA
*UH2B080A9V3VA
*UH2B080A9V4VA
*UH2C100A9V4VA
*UH2C100A9V5VA
*UH2D120A9V5VA 24-1/2" 1 - 24" X 25 X 1"
*First letter may be "A" or "T"
**NOTE: For upflow 5 ton airflow models where the airflow
requirement exceeds 1800 CFM - Modles will require return air
openings and filters on: (1) both sides, or (2) one side and the
bottom, or (3) just on the bottom
NOTE: For upflow 5 ton airflow models where the airflow
requirement exceeds 1800 CFM - Models will require return
air openings and filters on: (1) both sides, or (2) one side and
the bottom, or (3) just the bottom.
UPFLOW FURNACE ONLY
LOCATING
NOTCHES
PROVIDED FOR
SIDE RETURN
CUTOUT
SEE OUTLINE DRAWING
*
CABINET
WIDTH
17-1/2" 1 - 17" X 25" X 1"
21" 1 - 20" X 25" X 1"
FILTER
QTY & SIZE
FRONT
of Furnace
Figure 13
18-CD26D1-10 11
Installer’s Guide
E
(
a
F
k
n
The furnace and the bottom filter rack installation can be
seen in Figure 14.
Airflow
Blower Door Hinge and Bottom Filter Rack Installation
Figure 14
OPTIONAL FILTER RACK INSTALLATION FOR BOTTOM
RETURN
The following checklist should be used when installing a
return filter on an upflow furnace:
a. Remove the filter.
b. Remove the filter rack.
c. Remove the bottom panel.
e. With the filter removed, the filter rack is compressed
and then inserted into the bottom of the furnace. The
retaining screw/pin on each side inserts into engagement
holes at the bottom of the furnace cabinet side. See
Figure 17.
f. Reinstall the furnace filter in the bottom position by
inserting the chamfer end first into the filter rack.
FILTER RACK INST ALLATION FOR SIDE RETURN AIR
ON UPFLOW FURNACES (Left or Right)
The following checklist should be used when installing a right
or left side return filter on an upflow furnace:
a. Remove the filter.
b. Remove the filter rack.
c. Leave the bottom panel in place.
e. Make side cutout by following the directions in the
“Return Air Duct Connections” section on page 11.
e. Compress the filter rack and reinstall in the side
position on the furnace. Confirm that the upper
retaining pin/screw locks into the engagement hole in
the blower deck and the lower pin/screw rests against
the side of the bottom panel. See Figures 16, 18-21.
f. Reinstall the furnace filter in the side position by
inserting the chamfer end first into the filter rack.
Filter Rack Assembly
Figure 15
Blower Deck
Engagement
Hole
VIEW
NGAGEMENT
HOLE DETAIL
Typical both sides
nd blower deck)
Figure 16
12 18-CD26D1-10
Filter
urnace
Rack
Cabinet
Side
Filter Rac
Retaining
Screw/Pi
Engagement Hole
For
Filter Rack
Installation With
Bottom Return
Figure 17
Conversion kits for horizontal filters are BAYFLTR203 for 17
1/2" width cabinets, BAYFLTR204 for 21" width cabinets,
and BAYFLTR205 for 24" width cabinets. These include
filters and brackets necessary for horizontal filters. In
addition, optional door kit BAYFLTR206 is also available.
See Figures 23 and 25.
Installer’s Guide
ly
F
CHAMFER
END OF
FILTER GOES
INTO FILTER
RACK FIRST
l
er
k
E
(
SIDE
Airflow
s)
Airflow
Furnace
Cabinet
Side
ngagement Hole
For
Filter Rack
Installation With
Bottom Return
BOTTOM ENGAGEMENT
BLOWER
DECK
urnace
Cabinet
Side
Filter Rack
Retaining
Screw/Pin
Figure 18
Engagement Hole
For
Filter Rack
Installation With
Return
Side
Filt
Rac
Bottom Pane
Furnace
Blower
Deck
SIDE
CUTOUT
Airflow
BOTTOM
PANEL
INSTALLED
SPRINGS
FILTER
RACK
RAILS
RETAINING
PIN
(Both Side
Figure 21
Typical Upflow Right Side Return Filter Rack Installation
Airflow
Filter Rack
Retaining
Screw/Pin
Filter
Rack
Assemb
Figure 19
Figure 22
CUTOUT
Airflow
RETAINING
PIN
Both Sides)
Typical Upflow Left Side Return Filter Rack Installation
SPRINGS
FILTER
RACK
RAILS
Figure 20
BOTTOM
PANEL
INSTALLED
RETURN AIR FILTERS FOR UPFLOW FURNACE IN
HORIZONTAL CONFIGURATION
When the Upflow Furnace is installed in the horizontal
configuration, the return air filters must be installed exterior
to the furnace cabinet. Remote filter grilles may be used for
homeowner convenience or the filters may be installed in the
duct work upstream of the furnace. See Figure 23.
Airflow
Optional door kit
BAYFLTR206
Figure 23
18-CD26D1-10 13
Typical Horizontal Filter Installation
Installer’s Guide
*
R
ALTERNATE UPFLOW FILTER
CLIP / BRACKET INSTALLATION - KIT09224
1. Determine the location to be used. The furnace cabinet
has dimples for location of the alternate furnace clips
(Side return only). Pre-drill clearance holes with a
3/16" drill. Bottom return holes are pre-drilled.
2. Install the clips in front and rear of the desired location
using the screws provided. The filter clip with the leaf
spring mounts in the rear of the cabinet. See Figure 24.
REAR
SIDE
CUT-OUT
ALTERNATE FILTE
CLIPS LOCATION
Figure 24
INSTALLING THE FILTER
The filter may need to be cut to fit the unit depending on the
location of the return air filter.
A score line and the words “CUT HERE” are located on the
end of the filter. If your application requires cutting the filter,
do so as indicted by the score mark.
Table 6
UNIT
SIZE
RETURN AIR
BOTTOM SIDE
17-1/2" DO NOT CUT DO NOT CUT
21" DO NOT CUT CUT ON LINE
24-1/2" DO NOT CUT CUT ON LINE
TYPICAL DOWNFLOW FURNACE
RETURN AIR FILTER INSTALLATIONS
Two filters are factory supplied for each downflow furnace.
These furnaces require high velocity type air filters. Downflow furnace filters must be located outside the furnace
cabinet. Typical installations are shown in Figure 25. Table
8 provides information for installation of the filter retaining
brackets shipped with downflow furnaces.
Table 7
MODELS
NUMBERS
*DH2B060A9V3VA
*DH2B080A9V3VA
*DH2B080A9V4VA
*DH2C100A9V4VA 21" 2 - 16" X 20" X 1"
*DH2D120A9V5VA 24-1/2" 2 - 16" X 20 X 1"
* First letter may be "A" or "T"
CABINET
WIDTH
17-1/2" 2 - 14" X 20" X 1"
FILTER
QTY & SIZE
Optional
BAYFLTR206
Door Kit
DOWNFLOW
Table 8
LOCATING FILTER RETAINER BRACKETS IN DUCTWORK
CABINET
WIDTH
17-1/2" 16-1/4" 15" 14" 14-3/8"
21" 19-3/4" 19-1/2" 14" 13-1/8"
24-1/2" 23-1/4" 22" 14" 13-5/8"
* LOCATION DIMENSION IS FROM END OF DUCT AGAINST THE FURNACE TO THE
SCREW HOLES FOR THE BRACKET.
RETURN
DUCT
WIDTH
DIMENSION
"A"
DIMENSION
"B"
FILTER
BRACKET
LOCATION
Optional door
kit
BAYFLTR206
Figure 25
DOWNFLOW/
HORIZONTAL
14 18-CD26D1-10
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