Trane AUH1D100A9601A, AUH1C080A9601A, AUH1D120A9601A, AUH1C100A9481A, ADH1B065A9421A Installer's Manual
...
18-CD29D1-11
Installer’s Guide
Upflow/ Horizontal, Downflow/ Horizontal,
Gas-Fired, Direct Vent Condensing
Furnaces
*UH1B040A9241A
*UH1B060A9361A
*UH1B080A9421B
*UH1C080A9601A
*__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.
*UH1
UPFLOW
*UH1C100A9481A
*UH1D100A9601A
*UH1D120A9601A
*DH1B040A9241A
*DH1B065A9421A
*DH1C085A9481A
*DH1D110A9601A
*DH1
DOWNFLOW
*UH1
UPFLOW/HORIZONTAL
*DH1
DOWNFLOW/HORIZONTAL
A341624P13
Installer’s Guide
▲
WARNING
!
SAFETY SECTION
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 WARN-
ING and CAUTION.
a. WARNING indicates a potentially hazardous situa-
tion which, if not avoided, could result in death or
serious injury.
b. CAUTION indicates a potentially hazardous situa-
tion 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.
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 4), of these
instructions.
3. Provide adequate combustion and ventilation air to the
furnace space as specified in “Air for Combustion and
Ventilation” (pages 8-9), 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 (starting on 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 “Gas Piping” (pages 31-32), of these instructions.
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 4), of these instructions.
9. The furnace may be used for temporary heating of buildings or structures under construction only when the
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 ther-
mostat (no field jumpers).
c. The furnace return air duct must be complete
and sealed to the furnace and clean air filters
are in place.
d. The furnace input rate and temperature rise
must be verified to be within nameplate marking.
e. 100% of the furnace combustion air require-
ment must come from outside the structure.
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 CAN/CGA B149
Installation Codes 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. 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 CAN/CGA B149.1 Installation Codes.
8. After it has been determined that each appliance
connected to the venting system properly vents
where tested as outlined above, return doors, windows, exhaust fans, fireplace dampers and any
other gas-fired burning appliance to their previous
conditions of use.
© 2014 Trane All Rights Reserved 18-CD29D1-11
Installer’s Guide
▲
WARNING
!
▲
CAUTION
!
f. The furnace return air temperature range is
between 55 and 80 degrees 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.
FIRE OR EXPLOSION HAZARD
Failure to follow the safety warnings exactly could
result in serious injury, death or property damage.
Improper servicing could result in dangerous operation, serious injury, death, or property damage.
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 may
need to be reduced (See High Altitude Installation).
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 • CAN/ CGA 2.3 standards.
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 installa-
tion in Manufactured/ Mobile housing when used with
BAYMFGH100A.
Contents
INSTALLATION INSTRUCTIONS
General Installation Instructions 3
Location and Clearances 4
Outline Drawings 5
Upflow Installation 7
Downflow Installation 7
Horizontal Installation 7
Air For Combustion and Ventilation 8
Duct Connections 10
Return Air Filters 11
General Venting Instructions 15
Venting Material 17
Venting Tables 18
Horizontal Venting 21
Venting Through The Wall 21
Venting Through The Roof 22
Downward Venting 24
Venting Through a Masonry Chimney 24
Condensate Drain Instructions 27
Electrical Connections 30
Field Wiring Diagrams 29
Gas Piping 32
Combustion Input Checks 33
Start Up and Adjustment 36
Preliminary Inspections 36
Lighting Instructions 36
Sequence Of Operation 37
Control And Safety Switch Adjustments 37
Airflow Adjustment 37
Abnormal Conditions 38
IFC Error Flash Code 40
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.
18-CD29D1-11 3
Installer’s Guide
▲
CAUTION
!
▲
WARNING
!
UPFLOW
FURNACE
CASED
COIL
SCREWS
(BOTH SIDES)
STANDOFFS
(BOTH SIDES)
STANDOFFS (4)
DRILL SCREWS (4)
▲
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.
NOTE: The manufacturer of your furnace does NOT test
any detectors and makes no representations regarding
any brand or type of detector.
Do NOT install the furnace in a corrosive or contaminated
atmosphere.
LOCATION AND CLEARANCES
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 vent and as centralized for heat distribution as practical?
2. Do all clearances between the furnace and enclosure
equal or exceed the minimums shown in the Table 1.
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.
4. Are there at least 3 inches of clearance between the furnace 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" minimum above
the highest snow accumulation level?
6. Allow sufficient height in supply plenum above or below
the furnace to provide for cooling coil installation if the
cooling coil is not installed at the time of this furnace
installation.
7. A furnace shall be installed so electrical components are
protected from water.
8. If the furnace is installed in a residential garage, it
must be installed so that the burners and the ignition
source are located not less than 18 inches (46 cm) above
the floor and the furnace must be located or protected
to avoid physical damage from vehicles.
UPFLOW INSTALLATION
Standoffs and screws (See Figure 1) 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.
1
FOR VERTICAL
INSTALLATIONS:
DOWNFLOW INSTALLATIONS
FIRE HAZARD
Do NOT install the furnace directly on carpeting, tile
or other combustible material other than wood flooring. For vertical downflow application, subbase (BAYBASE-205) 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.
Required floor opening:
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.
NOTE:
On upflow 5 or 6 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.
4 18-CD29D1-11
2
CABINET
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"
SUBBASE CROSS SECTION
TABLE 1
RETURN
DUCT WIDTH
FLOOR OPENING PLENUM OPENING
"A" "B" "C" "D"
1. *UH1D120A9601, *UH1C080A9601, *UH1C100A9481, AND
UH1D100A9601 REQUIRE 3” DIAMETER VENT PIPE.
2. DIAMETER OF VENT PIPE MAY BE LIMITED TO 2-1/2” OR 3”
ON SOME MODELS AT DIFFERENT ALTITUDES. REFER TO THE
VENT LENGTH TABLE FOR PROPER APPLICATION.
Installer’s Guide
From Dwg. C341884 Rev. 9
(ALL DIMENSIONS ARE IN INCHES)
*UH1 OUTLINE DRAWING, UPFLOW / HORIZONTAL
18-CD29D1-11 5
Installer’s Guide
From Dwg. C341885 Rev. 7
(ALL DIMENSIONS ARE IN INCHES)
*DH1 OUTLINE DRAWING, DOWNFLOW / HORIZONTAL
17-1/2" 2-1/4" 16-1/4" 16"
MODEL DIM "A" DIM"B" DIM "C" DIM "D"
*DH1B040A9241
*DH1B065A9421
*DH1C085A9481 21" 2-1/2" 19-3/4" 19-1/2"
*DH1D110A9601 24-1/2" 2-15/16" 23-1/4" 23"
* May be "A" or "T"
Part numbers can end in A-Z
6 18-CD29D1-11
Installer’s Guide
3
A (width)
FURNACE
FRONT
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 95% 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 installation to stabilize and secure the furnace and TXC cased coil in the horizontal position. See
Figure 4.
IMPORTANT:
The 2/4TXC cased coil must 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 cased coil is secured to the furnace and both the furnace and the cased coil must be properly supported. The
brackets mount using the rear screws on the coil case and
use the screws provided to secure the bracket to the furnace. The remaining bracket is placed as close to center as
possible (horizontally) between the coil case front and the
furnace bottom channel (for downow/horizontal furnace).
Use four of the screws provided to secure the bracket. The
upflow furnace, converted to horizontal, aligns and attaches
the TXC coil as in Figure 1. However, the coil requires additional support.
B (depth)
D
C
5
UPFLOW/
HORIZONTAL
SHOWN
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 a minimum of 6
inches to allow clearance for the condensate drain to
exit the cabinet in the horizontal position.
The horizontal furnace may also be suspended from the
joists using 3/8" all-thread rods with pieces of angle iron
underneath the furnace to form a hanging rack at both
ends and the midpoint. The rods need to be of sufficient
length to allow for proper clearances from combustible
materials. The angle iron needs to be at least 32" in length
to allow for access to service panels.
6
50 CU. FT. OR MORE
PER 1000 BTU/HR. INPUT
ALL EQUIP. INSTALLED
4
CASED COIL CONNECTION
BRACKET FOR DOWNFLOW
FURNACE IN HORIZONTAL
DOWNFLOW ONLY
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 3 & Clearance 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.
UNCONFINED
AIR FOR COMBUSTION AND VENTILATION
If these furnaces are installed in a nondirect vent capacity then the adequate flow of combustion and ventilating
air must not be obstructed from reaching the furnace. Air
openings provided for combustion air 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 — CAN/CGA B149.1 or 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.
18-CD29D1-11 7
Installer’s Guide
OUTSIDE AIR IS RECOMMENDED
The use of indoor air for most applications is acceptable,
unless there is the presence of corrosive chemicals or
contamination. Certain types of installation will require
the use of outside air for combustion.
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 “confined” laundry rooms
* Furnaces installed in “confined” hobby or craft rooms
* Furnaces installed near chemical storage areas.
Exposure to the following substances in the combustion 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
Furnace locations may be in a “confined space” or an “un-
confined space”.
Unconfined space is defined in Figure 6. These spaces may
have adequate air by infiltration to provide air for combus-
tion and ventilation. Buildings with tight construction (for
example, weather stripping, heavily insulated, caulked, vapor barrier, etc.), may need additional air to be provided as
described for confined space.
1. All air from inside the building as in Figure 8: The confined 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 2 for minimum open areas requirements.
2. All air from outdoors as in Figure 9: 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 2,
for minimum open areas requirements.
TABLE 3
MINIMUM FREE AREA IN SQUARE INCHES
EACH OPENING (FURNACE ONLY)
Furnace
Maximum
BTUH/INPUT
Rating
40,000
60,000
80,000
97,000
110,000
Air
From
Inside
100
100
100
100
110
Air From Outside
Vertical
Duct
10
15
20
25
28
Horizontal
Duct
20
30
40
50
55
8
Confined spaces are installations with less than 50 cu. ft. of
space per 1000 BTU/hr input from all equipment installed,
as in Figure 7. Air for combustion and ventilation requirements can be supplied from inside the building as in Figure
8 or from the outdoors, as in Figure 9.
Table 2
MINIMUM AREA IN SQUARE FEET
FOR UNCONFINED SPACE INSTALLATIONS
FURNACE MAXI-
MUM BTUH INPUT
RATING
40,000
60,000
80,000
97,000
110,000
WITH 8 FT. CEILING
MINIMUM AREA IN SQUARE FEET
OF UNCONFINED SPACE
250
375
500
625
688
7
CONFINED
SPACE
8 18-CD29D1-11
9
Installer’s Guide
On any job, flexible connections of nonflammable material may be used for return air and discharge connections to
pre vent 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, amplify the slightest 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.
RETURN AIR DUCT CONNECTION
NOTE:
On upflow 5 or 6 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.
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 connect to the existing supply and return
ductwork.
2. For side return installations on upflow models, remove
the insulation around the opening in the blower compartment.
DUCT CONNECTIONS
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 or whichever is applicable.
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.
NOTE:
Minimum return air temperature is 55° F.
3. The side panels on upflow furnaces include locating
notches which may be used as guides for cutting an
opening for return air. Refer to Figure 11 and the outline drawing on pages 5-6 for duct connection dimensions for various furnaces.
4. If a 3/4" ange is to be used for attaching the air inlet
duct, add to cut where indicated by dashed lines in
Figure 11. Cut corners diagonally and bend outward to
form flange.
5. If flanges are not required, and a filter frame is installed, cut along knockout guidelines.
6. Upflow Furnaces: Use the optional filter rack on
either side or on the bottom if the filter is to be used
within the furnace cabinet.
When the upflow furnace is installed in the horizontal
application and a return duct is attached to the top side
as shown in Figure 10, install the filter in a remote
location.
Do not install the filter in the return duct directly
above the furnace in horizontal applications.
18-CD29D1-11 9
Installer’s Guide
▲
WARNING
!
▲
WARNING
!
When the upflow furnace is installed in the horizontal
application and a close coupled (less than 36") return
duct is attached to the bottom side of the furnace as
shown in Figure 10, securely attach a 1/2" mesh metal
hardware cloth protective screen to the inside bottom
of the filter grill to prevent personal injury from
contacting moving parts when reaching into the
return opening to replace the filter.
Close coupled (less than 36") return (filter directly
beneath bottom side return) is not recommended due to
noise considerations.
Downflow Furnaces: Brackets are factory supplied
to mount filters in the return air duct work.
FIRE OR EXPLOSION HAZARD
Do not install the filter in the return duct directly above
the furnace in horizontal applications. Install the filter remotely. Failure to follow the safety warnings exactly could
result in serious injury, death or property damage.
SAFETY HAZARD
To prevent injury or death due to contact with moving
parts, turn the power to the furnace off before servicing
filters
Failure to follow the safety warnings exactly could result
in serious injury, death or property damage.
REMOVE FILTER FROM UPFLOW
FURNACE WHEN RETURN DUCT IS
ATTACHED TO FURNACE TOP SIDE
(HORIZONTAL APPLICATIONS) AS
SHOWN.
Close coupled (less than 36")
return (filter directly beneath bottom
side return) not recommended due to
noise considerations. If used, securely
attach 1/2" mesh metal hardware cloth
protective screen to the inside bottom
of filter grill.
FILTER
0
7. Connect the duct work to the furnace. See Outline
Drawing (pages 5-6) 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.
8. When replacing a furnace, old duct work should be
cleaned out. Thin cloths should be placed over the
registers and the furnace fan should be run for 10 minutes. Don’t forget to remove the cloths before you start
the furnace.
q
LOCATING
NOTCHES
PROVIDED
FOR SIDE
RETURN
CUTOUT
*
*
*
*
CUT OUT
FOR
SIDE
FILTER
FRONT
of Furnace
*SEE OUTLINE DRAWING
RETURN AIR FILTERS
(Filter and filter rack are not supplied with unit)
TYPICAL UPFLOW RETURN AIR FILTER INSTALLATIONS
These furnaces require high velocity type air filters. The
optional filters may be located within the furnace blower
compartment for UPFLOW furnaces in either a BOTTOM
or SIDE (left side or right side) return air inlet. Some
optional filters may need to be trimmed for side or bottom
filter use.
The furnace and the blower filter rack installation can be
seen in Figure 12.
The optional furnace filter in the bottom or side configuration can be removed by simply turning the two latches on
the blower door and tilting the door forward.
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.
TABLE 4 - MINIMUM CLEARANCE FROM COMBUSTIBLE MATERIALS FOR
UPFLOW/HORIZONTAL LEFT AND DOWNFLOW/HORIZONTAL RIGHT FURNACES
UNIT LOCATION
FURNACE SURFACE
SIDES 0" 1" 0"
BACK 0" 3" 6"
TOP 1" 1" 1"
FRONT 3" 3" 18"
VENT 0" 0" 0"
NOTE: CLEARANCE REQUIRED AT TOP OF PLENUM IS 1"
10 18-CD29D1-11
VERTICAL
CLOSET
HORIZONTAL
CLOSET
HORIZONTAL
ALCOVE / ATTIC
Installer’s Guide
Filter
TABLE 5
UPFLOW FURNACE RETURN AIR FILTERS
CABINET
WIDTH
14-1/2" 1 14" X 25" X 1" 17-1/2" X 25" X 1"
17-1/2" 1 17" X 25" X 1" 17-1/2" X 25" X 1"
21" 1 20" X 25" X 1" 17-1/2" X 25" X 1"
24-1/2" 1 24" X 25" X 1" 17-1/2" X 25" X 1"
**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 on the bottom
QTY*
CABINET
BOTTOM FILTER
CABINET
SIDE FILTER
Airflow
NOTE: The narrow 14.5" width furnace cabinet prevents
use of the filter rack for right side return. Pre-drill clearance holes and then attach filter clips with the screws
provided. The filter clip with the leaf spring mounts in the
rear of the cabinet
OPTIONAL FILTER RACK INSTALLATION FOR BOTTOM
RETURN - BAYRACK960
The following checklist should be used when installing as a
bottom return filter on an upflow furnace:
a. Remove the filter.
b. Remove the bottom panel.
c. Pre-drill two engagement holes with 3/16" drill at
dimple locations. See Figure 14.
d. 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 15.
e. Reinstall the furnace filter in the bottom position by
inserting the chamfer end first into the filter rack.
NOTE: Remove the bottom front channel to install the
filter rack in the 14-1/2" width cabinet furnaces.
e
w
Airflow
BOTTOM FILTER RACK INSTALLATION
r
Blower Deck
Engagement
PRE-DRILL
Two clearance holes with a
3/16” drill at dimple locations
(one per side)
t
Furnace
Cabinet
Side
Hole
VIEW
Rack
Filter Rack
Retaining
Optional Filter Rack Accessory Kit
Engagement Hole
For
Filter Rack
Installation With
Bottom Return
(Pre-drill 3/16” diameter
clearance holes)
Screw/Pin
BAYRACK960A
18-CD29D1-11 11
Installer’s Guide
Filter
Rack
Assembly
Furnace
Blower
Deck
Filter Rack
Retaining
Screw/Pin
Engagement Hole
For
Return
Filter Rack
Installation With
Side
Furnace
Cabinet
Side
Filter Rack
RETAINING
PIN
(Both Sides)
SPRINGS
SIDE
CUTOUT
FILTER
RACK
RAILS
BOTTOM
PANEL
INSTALLED
Airflow
RETAINING
PIN
(Both Sides)
SPRINGS
SIDE
CUTOUT
FILTER
RACK
RAILS
BOTTOM
PANEL
INSTALLED
Airflow
TABLE 6
Cabinet Width Left Side Bottom Right Side
14.5 X
17.5 X X X
21 X X X
24.5 X X X
1. UC1B060C has 10x7 blower which requires use of alternate filter
clips for left side filter. "K1" and later use the filter rack.
2. Remove bottom front channel to install or reposition filter rack.
X - All Models
OPTIONAL FILTER RACK INSTALLATION FOR SIDE
RETURN AIR ON UPFLOW FURNACES (Left or Right) BAYRACK960
The following checklist should be used when installing a
right or left side return filter on an upflow furnace:
a. Remove the filter.
b. Leave the bottom panel in place.
c. Make side cutout by following the directions in the
“Return Air Duct Connections” section on page 9.
d. 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 14, 18-20.
e. Reinstall the furnace filter in the side position by
inserting the chamfer end first into the filter rack.
1
X2Use Alternate Filter Clips Only
i
Typical Upflow Left Side Return Filter Rack Installation
o
y
u
BLOWER
DECK
12 18-CD29D1-11
BOTTOM ENGAGEMENT
Furnace
Cabinet
Side
Retaining
Screw/Pin
Filter
Rack
Bottom Panel
Typical Upflow Right Side Return Filter Rack Installation
p
Airflow
Accessory filter kit
BAYFLTR203, 204, or
205 used for Upflow
Horizontal furnaces
Typical Horizontal Filter Installation
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