American Standard AUXIB040A9241A Assembly instructions

IIIIII IIIIIIIIIIIIII IIII IIII
18- CD19D6- 27
*DX-IN-IO
Upflow /Horizontal and Downflow /Horizontal
Gas-Fired, Direct Vent Condensing Furnaces
*UXIB040A9241A *UXIC100A9481A
*UXIB060A9361A *UXID100A9601A
*UXIB080A9421A *UXID120A9601A
*UXIC080A9601A
*__First letter may be "A" or "T"
ALL phases of this installation must comply with NATIONAL, STATE AND LOCAL CODES
*DXIB040A9241A
*DXIB060A9361A
*DXIB080A9421A
*DXIC100A9481A
*DXID120A9601A
IMPORTANT -- This Document is customer property and is to remain with this unit.
Please return to service information pack upon completion of work.
*UX-1 *DX-1
A/R
FLOW
UPFLOW
DOWNFLOW
AIR
FLOW
AIR
FLOW
/
UPFLOW/HORIZONTAL\DOWN FLOW/HORIZONTAL FLOW
o
A341624P06

Installer's Guide
SAFETY SECTION
The fl)llowing safety practices and precautions must be
fl)llowed during the installation, servicing, an(] operation of
this fllrnace.
1. Use only with the type of gas approved fl)r this fllrnace.
Reler to the fllrnace rating plate.
2. Install this fllrnace only in a location and position as
specified in "Location and Clearances" (page 3), of these
instructions.
3. Provide adequate combustion and ventilation air to the
fllrnace space as specified in "Air lot Combustion and
Ventilation" (pages 8-9), of these instructions.
4. Combustion products must be discharged outdoors.
Connect this fllrnace to an approved vent system only, as
specified in the "Venting" section (pages 11-18), of these
instructions.
5. Never test fl)r gas leaks with an open flame. Use a
commercially available soap solution made specifically
fl)r the detection of leaks to check all connections, as
specified in "Gas Piping" (pages 22-23), of these
instructions.
6. Always install the fllrnace to operate within the fllrnace's
intended temperature-rise range with a duct system
which has an external static pressure within the allow-
able range, as specified on the unit rating plate. Airfow
with temperature rise lot cfln versus static is shown in
the Service Facts accompanying this fllrnace.
7. When a fllrnace is installed so that supply ducts carry air
circulated by the fllrnace to areas outside the space
containing the fllrnace, the return air shall also be
handled by a duct(s) sealed to the fllrnace casing and
terminating outside the space containing the fllrnace.
8. A gas-fired fllrnace lbr installation in a residential garage
must be installed as specified in "Location and Clear-
ances" section (page 3), of these instructions.
9. The fllrnace may be tlsed :[or temporary heating of
buildings or structures under construction only when the
fl)llowing conditions have been met:
a. The fllrnace venting system must be complete and
installed per manufacturers instructions.
b. The fllrnace is controlled only by a room thermostat
(no field jumpers).
c. The fllrnace return air duct must be complete and
sealed to the fllrnace and clean air filters are in place.
d. The fllrnace input rate and temperature rise must be
verified to be within nameplate marking.
e. 100% of the fllrnace combustion air requirement
must come from outside the structure.
f. The fllrnace return air temperature range is between
55 and 80 degrees Farenhiet.
g. Clean the fllrnace, duct work, and components upon
substantial completion of the construction process, and
verily/fllrnace operating conditions including ignition,
input rate, temperature rise and venting, according to the
manufacturer's instructions.
Safety signal words are used to designate a degree or level of
seriousness associated with a particular hazard. The signal
words lbr salety markings are DANGER, WARNING, and
CAUTION.
a. DANGER indicates an imminently hazardous situation
which, if not avoided, will result in death or serious injury.
This signal word is limited to the most extreme situa-
tions.
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 opera-
tion, 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 horizon-
tal 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.
5.
Close fireplace dampers.
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 sum-
mer 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 accor-
dance with the National Fuel Gas Code, ANSI Z221.1/
NFPA 54 and/or CAN/CGA B149 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.
b.
c.
WARNING indicates a potentially hazardous situation
which, if not aw_ided, could result in death or serious
injury.
CAUTION indicates a potentially hazardous situation
which, if not aw_ided, may result in minor or moderate
injury. It is also used to alert against unsafe practices
and hazards inw_lving only property damage.
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.
© 2006 American Standard Inc. All Rights Reserved 18-CD19D6-27

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 fl)llowed in
estimating heating requirements. When estimating heating
requirements _br 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 installa-
tion of gas fired equipment, wiring, plumbing, and flue
connections must be adhered to. In the absence of local codes,
the installation must confl)rm with latest edition of the
National Fuel Gas Code ANSI Z223.1 • National Installation
Code, CAN/CGA B 149.1. The latest code may be obtained
fl'om the American Gas Association Laboratories,
8501 E. Pleasant Valley Rd., Cleveland, Ohio 44131.
These flwnaces have been classified as CATEGORY IV
flwnaces in accordance with latest edition of ANSI Z21.47 •
CAN/CGA 2.3 standards.
Category IV flwnaces 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
flwnaces are approved for installation in Manutactured/
Mobile housing when used with BAYMFGH 100A.
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.
Do not install the furnace in a corrosive or contaminated
atmosphere.
Installer's Guide
Contents
INSTALLATION INSTRUCTIONS
General Installation Instructions
Location and Clearances
Outline Drawings
Upflow Installation
Downflow Installation
Horizontal Installation
Air For Combustion and Ventilation
Duct Connections
Return Air Filters
General Venting Instructions
Venting Material
Venting Tables
Horizontal Venting
Venting Through The Wall
Venting Throught The Roof
Downward Venting
Venting Through a Masonry Chimney
Condensate Drain Instructions
Electrical Connections
Field Wiring Diagrams
Gas Piping
Combustion Input Checks
Start Up and Adjustment
Preliminary Inspections
Lighting Instructions
Sequence Of Operation
Control And Safety Switch Adjustments
Airflow Adjustment
Abnormal Conditions
IFC Error Flash Code
LOCATION AND CLEARANCES
The location of the furnace is normally selected by the
architect, the builder, or the installer. However, beibre the
fllrnace is moved into place, be sure to consider the fl_llowing
requirements:
1. Is the location selected as near the vent and as central-
ized fl_r heat distribution as practical?
2. Do all clearances between the flwnace and enclosure
equal or exceed the minimums shown in the Table 1.
3. Is there sufficient space lbr servicing the flwnace and
other equipment? A minimum of 24 inches front accessi-
bility to the flwnace 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 fllrnace
front panel and any closed panel or door provided?
5.
6.
7.
8.
Are the vent pipe and combustion air inlet pipe within
vent table lengths? Will the pipes remain unobstructed?
Allow sufficient height in supply plenum above or below
the flwnace to provide lbr cooling coil installation if the
cooling coil is not installed at the time of this flwnace
installation.
A flwnace shall be installed so electrical components are
protected from water.
If the flwnace 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 flwnace must be located or protected to
aw_id physical damage from vehicles.
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 installa-
tions. This is necessary for proper condensate drainage.
18-CD19D6-27 3

o
I:D
r.D
E:I
Ob
go
/5" KNOCKOUr
DRAN
(AL_ iNAT[)
MINIMUMCLEARANCETO
COMBUSTIBLEMATERIALS
LPFLOW
SIDES O iN
_EAN O i_
FIONT 3 _
TOP i i_,
L, O N
HORIZONTAL (FLUE
DISCHARGE ON THE LEFTI
SIDES
RI@H[ 0 N
LEFT O N
NE/,R 6 iN
FRONT i8 iN
TOP N
L,,E N
CLOSET
SDES
NIGHT iN
LEFT iN
REAR iN
FRONT iN
OP N
FLUE N
Y
DIM "D-
_L_ INLETAIR ' _i
24 1/32" 37/32
NOTES:
I * X _10 960 REOUiR 5 3" DIAMETER V[I_Y PiPE
_XiO0 948 ?_ _UXi00¢960 RFOUIR_S 2¸i/2" OR 3"
D[AM[TRR VENT PIPE
2 DIAMETER OF VENT PiP_ MAY BE Li_fT[D TO 2 I/2" OR 3"
ON SOME MODELS AT Di_LRENT ALTii_D[S REFER _0 T_[
VENT LF/GTH TA@LE _OR PROPER APPLICA_iON
(SEE NoTEMODELI&2) DIM "A" DIM "B" DIM "C" DIM "[3" DIM "E" DIM "F
_UX iBO4OAgP/I i A*
_,UXi5060A936i ^*
_UX iBO80A942i ^"
_'UXO60R936*_'
_UX080'!942_ _
_UYOGQRgVS_
_UYO8OR9V3_
_UX 5040A9 21""
_UX BO60A963 *"
_,UX BOSOAgN3 "*
i7 i/2" 2 i/4" i6 i/4 16 7 1/2"
_'UXiG i 00A948i"_
÷UX iC080A960 i ^"
_UX i00R948÷÷
_,UY OORf,V4_'_
_UX ', i 00,'/9H4 i _
_UX biOOA960i'_
_UX D120A960 i ^"
_UX POR960_
*UY 20R9VD_,
_UX Di2OA9Hbi_"
2i 2 i/2" i9 3/4 i9 i/2 9
24 i/2" ? i5/i6" 23 i/4 2 " I0
3 _
3"
PREFIX MAY BE A OR "Y"
_ SUFF X LL}TER VAY isE "D" 0 THRU 9
_ SUFFIX LLTTEN MAY iE "W" 0 THRU 9
^ SUFFIX LLYTER MAY _[ A /_
From Dwg. 21C341884 Rev. 4
m
m
0
E,

o
Ob
K_
o"t
/_?CONNKC Tu
/
//' S NO T
/_B
/6
OR iO_'_TAL{/)"d} I,,S:'T_
[}Ri_ I N \
I 7/8' x 7/8' /2
SLOT v_,,OC KOU T \,
_/8" -_
ECTRiCAL
SUPP Y
OA$ CONNKC I0
(ALTEi_ AT: ) K OCKOUT
*DX-C DOWNFLOW /HORIZONTAL OUTLINE DRAWING
(ALL DIMENSIONS ARE IN INCHES)
7 3/8 _
/--CONNECT_7/8 @LKC RCALoN(AL}EB!,_AT }
/
7314
PR X MAv B A 0 T
_ SUF X TIER S,IA7 BL D 0 _P 9
_ SUFFIX L(ITER MAV BE 'W" 0 T_NU 9
A SUPri× L_TTER MM' @_ A Z
NOTS:
I I}}A!/ET R OF VFN PIPE ray BF _<qlFD
0 2 i/:_" OR 3' ON S@{E MOO LS AT DIRR R f';
,_L TUOES REFER TO THE V S,T L fsq}TH T,_!_LE
FOr7 _70PER APPLfCATiON
MODEL A B CD
*DX1 B040A9241A
*DX1B060A9361A 17-1!2" 2-1/4" 16-1/4" 16"
*DX1 B080A9421A
*DX1C100A9481A 21" 2-1/2"" 19-3/4" 19-1/2"
*DX1D120A9601A 24-1/2" 2-15/16" 23-1/4" 23"
- First letter may be "A" or "T"
MINIMUMCLEARANCETO
COMBUSTIBLEMATERIALS
DOWNFLOW
SIDES O
_EAR O
RONT 3 N
'OP
U O
.....................................HORIZONTAL IFLUE
DISCHARGE ON THE LEFT}
ALCOVE
S_DES
RIOF C N
LEFT O iN
REAR 6 N
FRONT 8 IN
CLOSET
SIDES
RIGH T iN
LEFT N
REAR iN
FRONT iN
TOP i N
FLUE IN
From Dwg. 21C341885 Rev. 4
m
m
m
=__,

iiiiiiiiiiii
Installer's Guide
UPFLOW INSTALLATION
Standofl_s and screws (See Figure 1) are included with the
cased coils Ior 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
standofl' is inserted into the cabinet alignment hole. The drill
screws are inserted through the standofl's then screwed into
the furnace flange.
The coil is always placed downstream of the furnace airflow.
(_ STANDOFFS (4) DRILL SCREWS (4)
,g
FOR VERTICAL
INSTALLATIONS:
SCREWS
STANDOFFS
(BOTH SIDES)
DOWNFLOW INSTALLATIONS
Do not install the furnace directly on carpeting, tile or other
combustible material other than wood flooring. For vertical
downflow application, subbase (BAYBASE205) must be
used between the furnace and combustible flooring. When
the downflow furnace is installed vertically with a cased coil,
asubbase is not required.
Required floor opening:
CABINET SIDE _CABINET SIDE
SUB-BASE _SUB-BASE
FLANGE -- /FLANGE
(BENT UP) -- (BENT UP)
SUB-BASE _ _ SUB-BASE
SUBBASE CROSS SECTION
TABLE 1
CABINET RETURN FLOOR OPENING PLENUM OPENING
WIDTH DUCT WIDTH "A .... B.... A.... B"
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"
HORIZONTALINSTALLATION
The coil and filrnace must be fidly supported when used in the
horizontal position. It is always recommended that an
auxiliary drain pan be installed under a horizontally in-
stalled evaporator coil or 90% gas lurnace. 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.
The coil is placed downstream of the furnace, with the apex of
the coilpointing in the direction ofthe airflow lor horizontal
installation. The cased coil is secured to the furnace and both
the furnace and the cased coilmust 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 (lor downflow/horizonml fllrnace). Use tour 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.
_) CASED COIL CONNECTION
BRACKET FOR DOWNFLOW
FURNACE IN HORIZONTAL
DOWNFLOW ONL Y
The fllrnace 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 plat-
lorm large enough to allow tot proper clearances on all sides
and service access to the front of the furnace (See Figure 4 &
Clearance Table). Line contact is only permissible between
lines Iormed by intersections of the top and two sides ofthe
furnace casing and buildingjoists, 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 tot sufficient protection from moisture. The furnace
must be supported at both ends and the middle when
installed horizontally.
6 18-CD19D6-27

The furnace must also be elevated a minimum o['6
inches to allow clearance for the condensate drain to
exit the cabinet in the horizontal position.
The horizontal fllrnace may also be suspended from the joists
using 3/8" all-thread rods with pieces of angle iron under-
neath the furnace to lbrm a hanging rack at both ends anti the
midpoint. The rods need to be of sufficient length to allow liar
proper clearances from combustible materials. The angle iron
needs to be at least 32" in length to allow for access to service
panels.
@
50 CU. FT. OR MORE
PER 1000 BTU/HR. INPUT
ALL EQUIP. INSTALLED W'T'"]OLO,..S
"i;""O"Y'"
UNCONFINED
AIR FOR COMBUSTION AND VENTILATION
If these furnaces are installed in a nondirect vent capacity
then the adequate flow of combustion anti ventilating air
must not be obstructed from reaching the furnace. Air open-
ings provided lbr combustion air must be kept free of obstruc-
tions which restrict the flow of air. Airflow restrictions aflect
the efficiency anti sale operation of the furnace. Keep this in
mind should you choose m remodel or change the area which
contains your furnace. Furnaces must have a free flow of air
lbr proper performance.
Provisions lbr combustion anti ventilation air shall be made
in accordance with latest edition of Section 5.3, Air lbr
Combustion anti Ventilation, of the National Fuel Gas Code,
ANSI Z223.1 -- CAN/CGA B149.1 or applicable provisions of
the local btdlding codes. Special conditions created by
mechanical exhausting of air anti fireplaces must be con-
sidered to aw_id unsatisfactory l_lrnace operation.
OUTSIDE AIR IS RECOMMENDED
The use of indoor air lbr 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 lot combustion.
The fl)llowing types ofinstallations will require use of
OUTDOOR AIR lbr 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 lbllowing 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 sol_ening chemicals
*Deicing salts or chemicals
* Carbon Tetrachloride
*Halogen type reli'igerants
* Cleaning solvents (such as perchloroethylene)
*Printing inks, paint removers, varnish, etc.
*Hydrochloric acid
* Cements and glues
*Antistatic fabric softeners for clothes dryers
Installer's Guide
* Masonry acid washing materials
Furnace locations may be in a "confined space" or an
"unconfined space".
Unc'mlfined space is defined in Figure 5. These spaces may
have adequate air by infiltration to provide air lbr combustion
anti ventilation. Buildings with tight construction (lbr
example, weather stripping, heavily insulated, caulked, vapor
barrier, etc.), may need additional air to be provided as
described lbr confinect space.
C'onf_ned spaces are installations with less than 50 cu. ft. of
space per 1000 BTU/hr input from all equipment installed.
Air Áor combustion and ventilation requirements can be
supplied from inside the building as in Figure 8 or from the
outdoors, as in Figure 9.
MINIMUM AREA IN SQUARE FEET
(_FOR UNCONFINED SPACE INSTALLATIONS
FURNACE WITH 8 FT. CEILING
MAXIMUM BTUH MINIMUM AREA IN SQUARE FEET
INPUT RATING OF UNCONFINED SPACE
60,000 375
80,000 500
100,000 625
120,000 875
Q I FURNACE _'_1
m
CONFINED
SPACE LESS THAN 50 CU. FT.
PER 1000 BTU/HR. INPUT
ALL EQUIP. INSTALLED
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 lbr an unconfined space.
The total input of all gas utilization equipment installed
in the combined space shall be considered in making this
determination. Reler 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 anti one com-
mencing 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. Reler to Table 2, for
minimum open areas requirements.
TABLE 2
MINIMUM FREE AREA IN SQUARE INCHES
EACH OPENING FURNACE ONLY)
Furnace
Maximum
BTUH/INPUT
Rating
60,000
80,000
100,000
120,000
Air
From
Inside
100
100
100
120
Air From Outside
Vertical
Duct
15
20
25
30
Horizontal
Duct
30
40
50
60
18-CD19D6-27 7

iiiiiiiiiiii
Installer's Guide
®
CONFINED SPACE
AIR FROM INSIDE BUILDING
CONFINED
SPACE
PERMANENT
OPENINGS
_J
®
CONFINED SPACE
AIR FROM OUTDOORS
L
CONFINED-
SPACE
CONFINED SPACE k
AIR FROM VENTILATED ATTIC/CRAWL SPACE
_ATTIC LOUVERS
DOORS
,UTLET
CONFINED -AIR
SPACE
ALTERNATE INLET
INLET A_R _AIR DUCT
CONFINED SPACE
AIR FROM VENTILATED ATTIC
:LOUVERS
TO OUTDOORS
CONFINED-
SPACE
INLET
AIR DUCT
DUCT CONNECTIONS
Air duct systems should be installed in accordance with
standards for air conditioning systems, National Fire
Protection Association Pamphlet No. 90. They shouM be sized
in accordance with ACCA Manual D or whichever is appli-
cable.
Central filrnaces, 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 fllrnace, and if manually operated, must
be equipped with means to prevent operation of either unit
unless the damper is in fifll heat or cool position.
On any job, flexible connections of nonflammable material may
be used Ibr return air and discharge connections to prevent
transmission of vibration. Though these units have t_en spe-
cifically designed _br quiet, vibration free operation, air ducts
can act as sounding boards and could, if poorly installed, am-
plil_¢ the slightest vibration to the annoyance level.
When the filrnace is located in a utility room adjacent to the
living area, the system should be carefiflly designed with
returns to minimize noise transmission through the return
air grille. Although these filrnaces are designed with large
blowers operating at moderate speeds, any blower moving a
high w)lume 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 fllrnace is installed so that the supply ducts carry
air circulated by the furnace to areas outside the space
containing the fllrnace, 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 SYSTEMS
Where there is no complete return duct system, the
return connection must be run full size from the fur-
nace to a location outside the utility room, basement,
attic, or crawl space.
Do Not install return air through the back of the Iumace
cabinet
Do Not install return air through the side of the filrnace
cabinet on horizontal applications.
NOTE:
Minimum return air temperature is 50 ° F.
All return air duct systems should provide fl)r installation of
return air filters.
1. Set the fllrnace in place.
2. For upflow side return installations, remove the insulation
around the opening in the blower compartment.
3. The side panels of the upflow furnace include locating
notches that are used as guides for cutting an opening Ior
return air, refer m Figure 10 and the outline drawing on
page 4 lbr duct connection dimensions for various
furnaces.
NOTE:
On upflow 5 ton airflow models, if the airflow requirement
exceeds 1800 CFM, these models will require return air
openings and filters on both sides; OR I side and the
bottom; OR just the bottom.
8 18-CD19D6-27

4. If a 3/4" flange is to be used lot attaching the air inlet
duct, add to cut where indicated by dotted lines in
Figure 10. Cut corners diagonally anti bend outward to
form flange.
5. If flanges are not required, and a filter frame is installed,
cut between locating notches (See Figure 10).
6. The bottom panel of the upflow fllrnace must be removed
lot bottom return air. Lay the fllrnace on its back.
Remove the two 1/4" hex screws securing the bottom front
channel to the cabinet. Lower the front edge of the bottom
front channel and pull lbrward to remove the channel.
The bottom return air panel will now easily slide out of
the cabinet. Reinstall the bottom front channel fl)r upflow
bottom return installations.
7. Use the filter retainer on side or bottom if filter is to be
used within the fllrnace cabinet on upflow only installa-
tions.
8. The horizontal installation of the uptlow furnace
requires an external filter section. Filter kits are
available for horizontal applications.
9. Connect duct work to fllrnace. See Outline Drawing lor
supply and return duct size and location. Flexible duct
connectors are recommended to connect both supply and
return air ducts to the fllrnace. If only the front of the
fllrnace is accessible, it is recommended that both supply
and return air plenums are removable.
RETURN AIR FILTERS
(Filters not supplied with unit)
TYPICAL UPFLOW RETURN AIR FILTER INSTALLATIONS
These furnaces require high velocity type air filters. The
filters may be located within the furnace blower compartment
lbr UPFLOW furnaces in either a BOTTOM or SIDE (left side
or right side) return air inlet.
TABLE 3
MODELS CABINET RLTER
NUMBERS WIDTH QTY&SIZE
*UX1B040A9241A
*UX1B060A9361A 17-1/2" 1- 17"X 25" X 1"
*UX1B080A9421A
*UX1C080A9601A 21" 1-20" X25" X 1"
*UX1C100A9481A
*UX1D100A9601A 24-1/2" 1-24" X25" X 1"
*UX1D120A9601A
*Firstlettermaybe"A"or"T"
***NOTE-On5tonairflowmodels,iftheairflowrequirement
exceeds1800CFM,thesemodelswillrequirefiltersonbothsides;
OR1sideandthebottom;ORjustthebottom.
NOTE:
On upflow 5 ton airflow models, if the airflow requirement
exceeds 1800 CFM, these models will require return air
openings and filters on both sides; OR I side and the
bottom; OR just the bottom.
The upflow fllrnace blower door has a hinge at the bottom
which allows the door to tilt lorward fl)r filter replacement
without the door being removed (See Figure 11). The optional
fllrnace filter in the bottom or side configuration can be
removed by simply turning the two latches on the blower door
ant] tilting the door lbrward.
The filter rails are spring loaded fl)r automatic adjustment to
allow standard size, locally obtainable replacement filters.
Installer's Guide
UPFLOW FURNACE ONLY
LOCATING *'_ ",.. I
NOTCHES PRO- _ I/
VlDED FOR SIDE I _"
RETURN CUTOUT; _ _"'/1
i//"_
_,"_-.._"_. I
*SEE OUTLINE DRAWING
I
CUT OUT
/FOR SIDE
/FRONT
of Furnace
The filter rack itself slides to adjust to the required width
needed lot bottom or side return (See Figure 12).
OPTIONAL BOTTOM FILTER RACK INSTALLATION
With the filter removed, the filter rack is compressed ant]
then inserted into the bottom of the furnace. The retaining
screw/pin on each sitie inserts into engagement holes at the
bottom of the furnace cabinet sitie.
Blower Door Hinge and Bottom Filter Rack Installation
@FILTER
RACK -_
RAILS
AUTOMATIC
ADJUSTMENT RETAINING
PIN
(Both Sides)
Optional Filter Rack Accessory Kit
BA YRACK960A
18-CD19D6-27 9

iiiiiiiiiiii
Installer's Guide
®
ENGAGEMENT
HOLE DETAIL
(Typical both sides
and blower deck)
OPTIONAL FILTER RACK INSTALLATION FOR
SIDE RETURN AIR ON UPFLOW FURNACES (Left or Right)
NOTE:
The optional filter rack installation is not allowed for right
side return on the following model: *UXI COSOA9601.
If side air return is desired, the following instructions should
be used:
a.
b.
C.
Open or remove the blower door.
Leave the bottom panel in place.
Alter the side cutout is made lbllowing the directions
in the "Return Air Duct Connections" section on
pages 8 and 9, compress the optional filter rack and
reinstall in the side of 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.
d. Install the optional fllrnace filter on the side inserting
the chamler end first.
®Filter
Furnace /Rack
Cabinet
Side
Engagement Hole
For Filter Rack
Installation With
Bottom Return
Filter Rack
Retaining
Screw/Pin
®BOTTOM ENGAGEMENT
Furnace
Cabinet
Side
Filter Rack
Retaining
Screw/Pin
Engagement Hole
For Filter Rack
Installation With
Bottom Return
Filter
Rack
t
Bottom Panel
®
BLOWER
DECK
Furnace
Cabinet =,,,_
Side
Engagement Hole Furnace
For Filter Rack Blower
Installation With
Side Return Deck
NFilter
Retain ing Rack
Screw/Pin Assembly
SIDE
CUTOUT \
RETAINING
(B°PIN "_
Iti /// FILTER BOTTOM
PANEL
INSTALLED
Typical Upflow Left Side Return Filter Rack Installation
10 18-CD19D6-27

Typical Upflow Right Side Return Filter Rack Installation
®
CHAMFER
END OF
FILTER GOES
INTO FILTER
RACK FIRST
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 cabinet. Remote filter grilles may be used lot home-
owner convenience or the filters may be installed in the duct
work upstream of the furnace. See Figure 20.
f_
TYPICAL RETURN AIR FILTER INSTALLATION IN
UPFLOW MODEL IN HORIZONTAL POSITION
Installer's Guide
BLOWER DOOR/HINGE REMOVAL
If clearance or other problems create a problem in using the
tilting door, the blower door hinge may be removed without
creating any problems with the seal of the furnace. To remove
the blower door, tilt the door Iorward 2 to 3 inches anti pull up.
To remove the tilt feature, simply remove the lower hinge as
shown in Figure 21. The bottom of the blower door will catch
in the bottom of the l_lrnace front channel for door replace-
ment.
Door Hinge Removed
ALTERNATE UPFLOW FILTER CLIP /BRACKET
INSTALLATION
1. Determine the location to be used. The furnace cabinet
has dimples lot 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 anti rear of the desired location
using the screws provided. The filter clip with the leaf
spring mounts in the rear of the cabinet.
@
ALTERNATE FILTER
CLIPS LOCATION
18-CD19D6-27 11

iiiiiiiiiiii
Installer's Guide
INSTALLING THE FILTER
The optional filter may need to be cut to fit the unit depend-
ing 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.
UNIT
SIZE
17-1/2"
21"
24-1/2"
RETURN AIR
BOTTOM SIDE
DO NOT CUT DO NOT CUT
DO NOT CUT CUT ON LINE
DO NOT CUT CUT ON LINE
TYPICALDOWNFLOWFURNACE
RETURNAIR FILTERINSTALLATIONS
Two high velocity type air filters are required lot for each
downflow furnace. Downflow furnace filters must be located
outside the furnace cabinet. Typical installations are shown
in Figure 23. Tables 5 and 6 provide inlormation lot installa-
tion of the filter retaining brackets shipped with downflow
furnaces.
TABLE 4
MODELS CABINET FILTER
NUMBERS WIDTH QTY & SIZE
*DX1B040A9241A
*DX1B060A9361A 17-1/2" 2- 14"X20"X 1"
*DX1B080A9421A
*DX1C100A9481A 21" 2 - 16" X 20" X 1"
*DX1D120A9601A 24-1/2" 2- 16"X20"X 1"
*First letter may be "A" or "T"
TABLE 5
LOCATING FILTER RETAINER BRACKETS IN DUCTWORK
CABINET RETURN DIMENSION DIMENSION FILTER
DUCT BRACKET
WIDTH WIDTH "A .... B" LOCATION*
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.
O
DOWNFLOW
Airflow
f_P"
HORIZONTAL
TABLE 6
MINIMUM CLEARANCE FROM COMBUSTIBLE MATERIALS FOR
UPFLOW/HORIZONTAL AND DOWNFLOW/HORIZONTAL FURNACES
UNIT LOCATION
VERTICAL HORIZONTAL HORIZONTAL
FURNACE SURFACE CLOSET CLOSET ALCOVE /ATTIC
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"
12 18-CD19D6-27

Installer's Guide
GENERAL VENTING
THIS FURNACE MUST BE VENTED TO THE OUTDOORS.
THESE FURNACES ARE INDUCED DRAFT VENTED
AND MUST NOT BE CONNECTED TO ANY VENT
SERVING ANOTHER APPLIANCE. PLEASE NOTE THAT
THESE FURNACES USE POSITIVE-PRESSURE VENT
SYSTEMS.
Proper venting is essential to obtain maximum efficiency
from a condensing fllrnace. Proper installation of the vent
system is necessary to assure drainage of the condensate and
prevent deterioration of the vent system.
American Gas Association has certified the design of condens-
ing fllrnaces fl)r a minimum of 0" clearance from combustible
materials with a single wall plastic vent pipe.
The recommended system is assembled from 2", 2-1/2", or
3" plastic pipe and fittings (See Table 7, page 14). Where the
system is routed to the outdoors through an existing masonry
chimney containing title products from another gas appliance,
or where required by local codes, then 3" venting of Type 29-
4C stainless steel must be used in place of PVC material.
These fllrnaces have been classified as CATEGORY IV
fllrnaces in accordance with the latest edition of
ANSI Z21.47 • CAN/CGA-2.3 Standards. Category IV
fllrnaces operate with positive vent pressure and with a vent
gas temperature less than 140 ° F above the dewpoint. These
conditions require special venting systems, which must be
gas tight and water tight.
NOTE:
When an existing furnace is removed from a venting system
serving other gas appliances, the venting system is likely to
be too large toproperly vent the remaining
attached appliances.
The lollowing steps shall be lollowed with each appliance
remaining connected to the common venting system placed in
operation, while the other appliances remaining connected to
the common venting system are not in operation.
1. Seal any unused openings in the common venting system.
2. Visually inspect the venting system lbr proper size and
horizontal pitch and determine there is no blockage or
restriction, leakage, corrosion or other deficiencies which
could cause an unsale condition.
3. Insofar as is practical, close all building doors and
windows and all doors between the space in which the
appliances remaining connected to the common venting
system are located and other spaces of the building. Turn
on clothes dryers and any appliances not connected to the
common venting system. Turn on any exhaust lens, such
as range hoods and bathroom exhausts, so they will
operate at maximum speed. Do not operate a summer
exhaust fan, close fireplace dampers.
4. Follow the lighting instructions. Place the appliance
being inspected in operation. Adjust thermostat so
appliance will operate continuously.
5. Test lbr spillage at the draR hood relief opening alter
5 minutes of main burner operation. Use the flame of a
match or candle, or smoke from a cigarette, cigar, or pipe.
6. Alter it has been determined that each appliance
remaining connected to the common venting system
properly vents when tested as outlined above, return
door, windows, exhaust lens, fireplace dampers and any
other gas-burning appliance to their previous conditions
of tlse.
If improper venting is observed during any of the above tests,
the remaining common venting system must be corrected.
Correction of the remaining common vent system shouM be
(tone by referring to the latest edition of the National Fuel
Gas Code (ANSI Z223.1) • CAN/CGA B 149.1 Installation
Codes or "Exhibit J" of ANSI Z21.47 • CAN/CGA-2.3 Stan-
dards. The lollowing are general steps to be used to correct or
resize a remaining vent system when a furnace which may not
be common vented is removed from the system:
a. Determine the Btu per hour input of all remaining
appliances attached to the venting system.
b. Determine the diameter, rise, and lateral of the
existing venting system, as well as quantity and type
of bends.
Use the appropriate tables in the latest edition of
the National Fuel Gas Code (ANSI Z223.1 °
CAN/CGA B 149.1 Installation Codes or "Exhibit J" of
ANSI Z21.47 • CAN/CGA-2.3 Standards. "Exhibit J"
inchldes examples and drawings of typical venting
systems.
IMPORTANT:
These furnaces may be installed as Direct Vent (sealed combustion) or as Nondirect vent (single pipe). The furnaces are shipped
DIRECT VENT with sealed combustion.
For DIRECT VENT APPLICATION: The furnaces must be vented to the exterior of the house and combustion air MUST come
through the inlet air pipe FROM OUTSIDE AIR.
For NONDIRECT VENT APPLICATION: The furnace shaft be vented to the exterior of the house, but combustion air may enter from
the surrounding area as long as combustion air requirements are met. (See AIR FOR COMBUSTION AND VENTILATION)
PVC VENT FITTING MATERIAL
These fittings are available from your Gas Furnace
Distributors.
Straight Pipe Sections, Couplings, 45 ° Elbows, 60 ° Elbows,
90 ° Elbows, Vent or Sanitary Tee, or other necessary fittings
may be 2", 2V2", 3", or 4" diameter. The allowable materials are
shown in Table 7.
VENT FITTING MATERIAL -PLASTIC
Gas and liquid tight single wall vent fittings, designed for
resistance to corrosive title condensate, MUST be used
throughout.
Listed in Table 8 & 9 are 2", 2V2",3", and 4" size fittings that
meet these requirements. The materials listed are various
grades of PVC and ABS plastic.
PIPE JOINTS: All joints must be fastened and sealed to
prevent escape of combustion products into the buiMing.
18-CD19D6-27 13

Installer's Guide
TABLE 7
PLASTIC PIPE DESIGNATIONS
PVC
ASTM STANDARD PIPE TYPE ALLOWABLE TEMPERATURE MARKING
F891 CELLULAR CORE "158 ASTM F891
D2665 DWV PIPE *'158 ASTM D2665
D1785 SCH 40, 80, 120 *'158 ASTM D1785
D2241 SDR SERIES *'158 ASTM D2241
CPVC
ASTM STANDARD PIPE TYPE ALLOWABLE TEMPERATURE MARKING
D2846 CPVC 41 **212 ASTM D2846
F441 SCH 40, 80 *'212 ASTM F441
F442 SDR SERIES *'212 ASTM F442
ABS
ASTM STANDARD PIPE TYPE ALLOWABLE TEMPERATURE MARKING
D2661 SCH 40 DWV **'180 ASTM D2661
F628 SCH 40 DWV CELLULAR CORE **'180 ASTM F628
* - Allowable temperatures based on classifications covered in ASTM D4396 [Deflection Temps Under Load (264 PSI)]
** - Allowable temperatures based on classifications covered in ASTM D1784 [Deflection Temps Under Load (264 PSI)]
*** - Allowable temperatures based on classifications covered in ASTM D3965 [Deflection Temps Under Load (264 PSI)]
NOTE:
It is recommended that the first joints from the furnace be
connected and sealed with high temperature RTV. This will
enable the pipes to be removed later without cutting.
Be sure to properly support these joints.
BONDING OF PVC
Commercially available solvent cement must be used to join
the pipe and fittings. Follow instructions on the container
careflflly.
Procedure fl)r Cementing Joints:
1. Cut pipe square, remove ragged edges and burrs. Chain-
Ier end of pipe, then clean fitting socket and pipe joint
area of all dirt, grease, moisture or chips.
2. After checking pipe and socket fl)r proper fit, wipe socket
and pipe with cleaner-primer. Apply a liberal coat of
primer to inside surface of socket and outside of pipe.
DO NOT ALLOW PRIMER TO DRY BEFORE APPLY-
ING CEMENT.
3. Apply a thin coat of cement evenly in the socket. Quickly
apply a heavy coat of cement to the pipe end and insert
pipe into fitting with a slight twisting movement until it
bottoms out.
4. Hold the pipe in the fitting lot 30 seconds to prevent
tapered socket from pushing the pipe out of the fitting.
5. Wipe all excess cement from the joint with a rag. Allow
15 minutes belore handling. Cure time varies according
to fit, temperature and humidity.
NOTE:
Follow venting instructions carefully when using PVC
cement.
IMPORTANT:
All joints must be water tight. Flue condensate is somewhat
acidic, and leaks can cause equipment damage.
(_ VENT AND INLET AIR CONNECTIONS
Seal VENT PIPE
with RTV sealant
Front of Furnace
Seal INLET AIR PIPE
with RTV sealant
Connection of the pipe and collar of the combustion air inlet
shouM just be a friction fit. It is recommended that the inlet
air joint be sealed with RTV type sealant to allow the joint to
be separated Ior possible fllture service. The inlet and vent
pipes must be properly supported throughout the entire
length.
Connection of the vent pipe to the vent collar shouM also be
accomplished using RTV type sealant. This type sealant
provides a connection which remains flexible and can be
separated in the fllture if service needs require the removal of
the vent pipe fl)r service or clearance.
NOTE:
To ensure proper operation at the vent lengths indicated, the
combustion air inlet and vent terminals should be in the
same pressure zone. Terminating the vent and inlet in
different pressure zones will change the maximum vent
lengths and may cause nuisance tripping of the pressure
switch(es). The amount of change can not be predicted. The
selection of the inlet and outlet terminal locations are the
responsibility of the designer/installer. If the installer
chooses separate pressure zones for the terminals, the
combustion air inlet termination must be in the higher (more
positive) pressure zone.
14 18-CD19D6-27

Installer's Guide
UPFLOW /HORIZONTAL VENTING TABLE
TABLE 8
MAXIMUM VENT LENGTH:
DIRECT VENT (2 PIPE SYSTEM) - klONDIRECT VENT (1 PIPE SYSTEM) -MAXIMUM TOTAL
MAXIMUM TOTAL EQUIVALENT FEET FOR EQUIVALENT FEET FOR
VENT AND INLET AIR PIPES (See Notes) VENT PIPE ONLY (See Notes)
2" PIPE 2-1/2" PIPE 3" PIPE 4" PIPE 2" PIPE 2-1/2" PIPE 3" PIPE 4" PIPE
MODEL & FITTINGS & FITTINGS & FITTINGS & FITTINGS & FITTINGS & FITTINGS & FITTINGS & FITTINGS
*UXI B040A9241A 60 80 100 130 50 80 80 130
*UXl B060A9361 A 60 80 100 130 50 80 80 130
*UXl B080A9421 A 50 80 100 130 40 80 80 130
*UXlC080A9601A 50 80 100 130 40 80 80 130
*UXl O100A9481A NOT ALLOWED 40 100 130 NOT ALLOWED 40 80 130
*UXl D100A9601A NOT ALLOWED 40 100 130 NOT ALLOWED 40 80 130
*UXl D120A9601A NOT ALLOWED 15 60 130 NOT ALLOWED 25 70 130
NOTES: * - First letter may be "A" or "T"
1. The INLET AIR of one pipe systems require the installation of a 90° elbow (to prevent dust and debris from failing straight into thefurnace) and a 2 foot
horizontal or vertical straight pipe section connected before or after the elbow.
2. DO NOT MIX PIPE DIAMETERS IN THE SAME LENGTH OF PiPE OUTSIDE THE FURNACE CABINET (Except adapters at the top of the furnace).
If different inlet and vent pipe sizes are used, the vent pipe must adhere to the maximum length limit shown in the table above (See Note 7 below for exception).
The inlet pipe can be of a larger diameter, but never smaller than the vent pipe.
3. MAXIMUM PiPE LENGTHS MUST NOT BE EXCEEDED! THE LENGTH SHOWN IS NOT A COMBINED TOTAL, IT IS THE MAXIMUM LENGTH OF EACH
(Vent or Inlet air pipes in two pipe systems).
4. One standard radius 90 ° elbow is equivalent to 12' of 4" pipe; one SHORT radius 90 ° elbow is equivalent to 10' of 3" pipe and one LONG radius elbow is
equivalent to 6' of 3" pipe. One SHORT/LONG radius 90 ° elbow is equivalent to 7½' of 2½" pipe, & 5' of 2" pipe. Two 45 ° elbows equal one 90°elbow.
5. The termination tee or bend must be included in the total number of elbows. If the BAWENT100 termination kit is used, the equivalent length of pipe is 5 feet.
There is zero equivalent length for the BAYVENT200.
6. Pipe adapters are field supplied.
7.4" pipe may be reduced to 3" for termination with BAYAIR30AVENTA or BAYVENT200 without additional length restriction.
DOWNFLOW/HORIZONTAL VENTING TABLE
TABLE 9
MAXIMUM VENT LENGTH:
DIRECT VENT (2 PIPE SYSTEM) - NONDIRECT VENT (1 PIPE SYSTEM) -
MAXIMUM TOTAL EQUIVALENT FEET FOR MAXIMUM TOTAL EQUIVALENT FEET FOR
VENT AND INLET AIR PIPES (See Notes) VENT PIPE ONLY (See Notes)
2" PIPE 2-1/2" PIPE 3" PIPE 4" PIPE 2" PIPE 2-1/2" PIPE 3" PIPE 4" PIPE
MODEL & FITTINGS & FITTINGS & FITTINGS & FITTINGS & FITTINGS & FITTINGS & FITTINGS & FITTINGS
*DX1 B040A9241A 60 80 100 130 50 80 80 130
*DXl B060A9361A 50 80 100 130 50 80 80 130
*DXl B080A9421A 45 80 100 130 40 80 80 130
*DXlC100A9481A NOT ALLOWED 80 100 130 NOT ALLOWED 80 80 130
*DX1D120A9601A NOT ALLOWED 15 60 130 NOT ALLOWED 25 70 130
NOTES: * - First letter may be "A" or "T"
1. The INLET AIR of one pipe systems require the installation of a 90 ° elbow (to prevent dust and debris from falling straight into the furnace) and a 2 foot
horizontal or vertical straight pipe section connected before or after the elbow.
2. DO NOT MIX PiPE DIAMETERS IN THE SAME LENGTH OF PIPE OUTSIDE THE FURNACE CABINET (Except adapters at the top of the furnace).
If different inlet and vent pipe sizes are used, the vent pipe must adhere to the maximum length limit shown in the table above (See Note 7 below for exception).
The inlet pipe can be of a larger diameter, but never smaller than the vent pipe.
3. MAXIMUM PiPE LENGTHS MUST NOT BE EXCEEDED! THE LENGTH SHOWN IS NOT A COMBINED TOTAL, IT IS THE MAXIMUM LENGTH OF EACH
(Vent or Inlet air pipes in two pipe systems).
4. One standard radius 90° elbow is equivalent to 12' of 4" pipe; one SHORT radius 90 ° elbow is equivalent to 10' of 3" pipe and one LONG radius elbow is
equivalent to 6' of 3" pipe. One SHORT/LONG radius 90 ° elbow is equivalent to 7½' of 2½" pipe, & 5' of 2" pipe. Two 45 ° elbows equal one 90°elbow.
5. The termination tee or bend must be included in the total number of elbows. If the BAYVENT100 termination kit is used, the equivalent length of pipe is 5 feet.
There is zero equivalent length for the BAYVENT200.
6. Pipe adapters are field supplied.
7.4" pipe may be reduced to 3" for termination with BAYAIR30AVENTA or BAYVENT200 without additional length restriction.
®SINGLE PIPE VENTING
UPFLOW FURNACE
'_ B--' A (0-2') or greater
_. _% a (0-2') or greater
E-_L L \ _:_ A+B = 2' minimum
Air ln/e/ _
..... / Ventutsnly
Air Inlet
\DOWNFLOW
FURNACE
_Vent only
to outside
A : 2' minimum
18-CD19D6-27 15

Installer's Guide
®
F_VENTTERMINAL (_ AIR SUPPLY INLET [] AREAWHERE TERMINAL IS NOT PERMITTED
Direct Vent Terminal Clearances
Canadian Installations US Installations
Clearance above grade, veranda, porch, deck, or
A= balcony 12 inches (30 cm) 12 inches (30 cm)
6 inches (15 cm) for appliances =/< 10,000 Btuh (3 kw), 12 6 inches (15 cm) for appliances =/< 10,000 Btuh (3 kw), 9
inches (30 cm) for appliances > 10,000 Btuh (3 kw) and =/< inches (23 cm) for appliances > 10,000 Btuh (3 kw) and =/<
B= Clearance to window or door that may be opened 100,000 Btuh (30 kw), 36 inches (91 cm) for appliances > 50,000 Btuh (15 kw), 12 inches (30 cm) for appliances > 50,000
100,000 Btuh (30 kw) Btuh (15 kw)
C= Clearance to permanently closed window
Vertical clearance to ventilated soffit located above the
D= terminal within a horizontal distance of 2 feet (61 cm)
from the center line of the terminal
E= Clearance to unventilated soffit
P= Clearance to outside corner
G- Clearance to inside corner
Clearance to each side of center line extended above 3 feet (91 cm) with a height 15 feet (4.5 m) above the
H= meter/regulator assembly meter/regulator assembly
I= Clearance to service regulator vent outlet 3 feet (91 cm)
6 inches (15 cm) for appliances =/< 10,000 Btuh (3 kw), 12 6 inches (15 cm) for appliances =/< 10,000 Btuh (3 kw), 9
j= Clearance to nonmechanical air supply inlet to building inches (30 cm) for appliances > 10,000 Btuh (3 kw) and =/< inches (23 cm) for appliances > 10,000 Btuh (3 kw) and =/<
or the combustion air inlet to any other appliance 100,000 Btuh (30 kw), 36 inches (91 cm) for appliances > 50,000 Btuh (15 kw), 12 inches (30 cm) for appliances > 50,000
100,000 Btuh (30 kw) Btuh (15 kw)
K= Clearance to a mechanical air supply inlet 6 feet (1.83m) 3 feet (91 cm) above if within 10 feet (3m) horizontally
Clearance above a paved sidewalk or paved driveway 7 feet (2.13 m) 1
L= located on public property
M- Clearance under veranda, porch, deck, or balcony "12 inches (30 cm) $
Notes:
1. In accordance with the current CSA B149.1 Natural Gas and Propane Installation Code.
2. In accordance with the current ANSI Z223.1/NPPA 54 National Puet Gas Code.
1". A vent shall not terminate directly above a sidewalk or paved driveway that is located between two singte family dwelling and serves both dwellings.
$. Pemitted only if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the floor.
* Clearance in accordance with local installation codes and the requirements of the gas supplier and the manufacturer's Installation Instructions.
16 18-CD19D6-27

Installer's Guide
Non-Direct Vent Terminal Clearances
Canadian Installations US Installations
Clearance above grade, veranda, porch, deck, or 12 inches (30 cm) 12 inches (30 cm)
A= balcony
6 inches (15 cm) for appliances =/< 10,000 Btuh (3 kw), 12
inches (30 cm) for appliances > 10,000 Btuh (3 kw) and =/< 4 feet (1.2m) below or to the side of opening; 1 foot (0.3m)
B= Clearance to window or door that may be opened 100,000 Btuh (30 kw), 36 inches (91 cm) for appliances > above opening.
100,000 Btuh (30 kw)
C= Clearance to permanently closed window
Vertical clearance to ventilated soffit located above the
D= terminal within a horizontal distance of 2 feet (61 cm)
from the center line of the terminal
E= Clearance to unventilated soffit
P= Clearance to outside corner
G= Clearance to inside corner
Clearance to each side of center line extended above 3 feet (91 cm) with a height 15 feet (4.5 m) above the
H= meter/regulator assembly meter/regulator assembly
I= Clearance to service regulator vent outlet 3 feet (91 cm)
6 inches (15 cm) for appliances =/< 10,000 Btuh (3 kw), 12
j= Clearance to nonmechanical air supply inlet to building inches (30 cm) for appliances > 10,000 Btuh (3 kw) and =/< 4 feet (1.2 m) below or to side of opening; 1 foot (300 m) above
or the combustion air inlet to any other appliance 100,000 Btuh (30 kw), 36 inches (91 cm) for appliances > opening
100,000 Btuh (30 kw)
K= Clearance to a mechanical air supply inlet 6 feet (1.83m) 3 feet (91 cm) above if within 10 feet (3m) horizontally
Clearance above a paved sidewalk or paved driveway 7 feet (2.13 m) 1 7 feet (2.13 m)
L= located on public property
M= Clearance under veranda, porch, deck, or balcony "12 inches (30 cm) $
Notes:
1. In accordance with the current CSA B149.1 Natural Gas and Propane Installation Code.
2. In accordance with the current ANSI Z223.1/NPPA 54 National Fuel Gas Code.
1". A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single family dwelling and serves both dwellings.
$. Pemitted only if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the floor.
* Clearance in accordance with local installation codes and the requirements of the gas supplier and the manufacturer's Installation Instructions.
ELBOW AND TEE MUST
BE AS CLOSE TO-
GETHER
AS POSSIBLE
POSSIBLE CONFIGURATIONS FOR TWO PIPE VENTING SYSTEMS
18-CD19D6-27 17

Installer's Guide
HORIZONTAL VENTING
NOTE:
Vent termination kit BAYAIR3OAVENT* or BAYVENT200* may be used instead of the horizontal and vertical termination
options shown in the following figures.
When the vent pipe is exposed to temperatures below freezing, i.e., when it passes through unheated spaces, etc., the pipe
must be insulated with 1/2 inch (22.7 mm) thick Armaflex-type insulation or equal. Ifthe space is heated sufficiently to
prevent freezing, then the insulation would not be required. If domestic water pipes are not protected from freezing then it is
assumed the space meets the condition of a heated space.
HORIZONTAL VENTING THROUGH WALL
These furnaces may be installed as direct vent (as
shipped) or as nondirect vent. Installation must con-
form to national, state, and local codes.
The vent & inlet terminals must be located at least 12"
minimum above normally expected snow accumulation level.
Avoid areas where staining or condensate drippage may be a
problem.
Location of the vent/wind terminal shouM be chosen to meet
the requirements of Figure 26 fl)r either direct or non-direct
vent applications.
(4 req.)
MAINTAIN 12" (18" FOR CANADA) MINIMUM
" '-.
BAYVENT200B ""* -
PITCH - Venting through the wall must maintain 1/4" per
fl)ot pitched upward to insure that condensate drains back to
the fllrnace.
FLUE GAS DEGRADATION - The moisture content of the
title gas may have a detrimental efl'ect on some building
materials. This can be avoided by using the roof or chimney
venting option. When wall venting is used on any surlhce that
can be affected by this moisture, it is recommended that a
corrosion resistant shield (24 inches square) be used behind
the vent terminal. This shieM can be wood, plastic, sheet
metal, etc. Also, silicone caulk all cracks, seams and joints
within 3 feet of the vent terminal.
COMBUSTIBLE MATERIAL WALL
A minimum clearance of 1" to combustible materials must be
maintained when using single wall stainless steel venting.
See Figure 30 above.
ShieM material to be a minimum of 24 gauge stainless or
ahlminized sheet metal. Minimum dimensions are 12"x12".
Shield must be fastened to both inside and outside of wall.
@
BAYAIR30AVENTA
(Sidewall)
Use screws or anchor type fasteners suited to the outside or
inside wall surfaces.
NONCOMBUSTIBLE MATERIAL WALL
The hole through the wall must be large enough to maintain
pitch of vent and properly seal.
Use cement mortar seal on inside and outside of wall.
See Figure 31.
®COUPLING
(PLASTIC
VEN TING
;IN. MII
1 ( OJOIr,
/
1" CLEARANCE
(AIR SPACE )
I
PVC WALL
MOUNT FLANGE
{OPTIONAL)APPROVED
TERMINATION
12" MIN. ABOVE
NORMALLY EXPECTED
SNOW ACCUMULATION
VENTINGTHROUGH COMBUSTIBLE WALLS
Pitch-- 1/4Inch PerFt
CLEARANCE ( 0" ACCEPTABLE FOR PVC VENT PIPE )
(1" ACCEPTABLE FOR TYPE 29-4C STAINLESS STEEL VENT PIPE )
18 18-CD19D6-27

®
COUPLIN G
(PLASTIC
VENTING ) /
I-1 6IN. MIN,
1II_TO00'NT_-- .
1
M OC#T_E NTAL_ "-
INSIDE • I--
OUTSIDE _
PVC WALL
MOUNT FLANGE
(OPTIONAL)
/
f
APPROVED
TERMINATION
/
12" MIN. ABOVE
NORMALLY EXPECTED
SNOW ACCUMULATION
VENTING THROUGH NON-COMBUSTIBLE WALLS
Pitch- 1/4 Inch Per Ft.
@
Installer's Guide
SUPPORT HORIZONTAL PIPE EVERY 3'
O" WITH THE FIRST SUPPORT AS CLOSE
TO THE FURNACE AS POSSIBLE.
INDUCED DRAFT BLOWER, HOUSING,
AND FURNACE MUST NOT SUPPORT
THE WEIGHT OF THE FLUE PIPE.
IRST
lACE
OWE&
,T
JEPIPE,
coupu_
TL
40" UPFLO_ OR D(TWNFLOVff FURNACE
HORIZONTAL AND VERTICAL VERTICAL
J ..............
@NOTE: VENT AND INLET MUST BE SUPPORTED
_SEE VENTING TABLE ,_ ATA MAXIMUM OF 3"INTERVALS
STRAPS OR OTHER SUITABLE SUPPORTS _
AT MAXIMUM OF 3'-0" INTERVALS AUsEONLY
I_TERMINATIOt_
n/
COM_US?ON_ F--------9
l'_ {il _x'_UPWARD PITCH " 1/4" PER FOOT l_
I I I F'RoSTESUoPPFOuRTNASHEOUL&BEEASoN_'_
AS POSSIBLE. O UwT#_LDE
40" UPFLOW OR
DOWNFLOW MODELS
45° ELBOW
OUTSIDE
WALL
STRAP
(F_ELDSUPPLIED)
\
ELBOW
(FIELD
SUPPLIED)
STUB CUT AT
45 _"ANGLE
BA YAIR3OAVENTA
NOTE:ANYFITTINGS PASSING
THROUGH AN UNHEATED SPACE
MUST BEINSULATED.
COMBUSTION
I AtR RAiNCAP
I_ 1"±112"
REDUCING
COUPLING,
FIELD SUPPLIED
IF NEEDED \
2", 2-112" _
or 3" PIPING
3" PIPING
BAYVENT2OOB WALL CAVITIES
18-CD19D6-27 19

iii iii++iii iiiiii/iiiiiiiiiiiiii+lii+iii+iii+iii+iii+iiHii
iiiiiiiiiiii
Installer's Guide
)OWNWARD VENTING @
"urnace may be in vertical or horizontal configuration.
DOWNWARD VENT {_
LENGTH IS LIMITED | r 1"_TO A MAXIMUM OF 15 |
_ / 40 InchSEE __ Upflow or
NOTES Downflow
6" Min.
All horizontal pipes must be supported at a maximum of 3 foot
intervals
NOTES:
A) Condensate trap for vent pipe must be a minimum of 6
inches in height.
B) Condensate trap for vent and inlet pipe must be connected
into a condensate drain pump; an open or vented drain; or
it can be connected to the outlet hose of the furnace's
condensate trap. Outdoor draining of the furnace and coil
condensate is permissible if allowed by local codes.
Caution should be taken to prevent drains from freezing or
causing slippery conditions that could lead to personal
injury. Excessive draining of condensate may cause
saturated ground conditions that may result in damage to
plants.
C) The condensate trap should be primed at initial start up
prior to heating season operation.
VENTING THROUGH THE ROOF
When penetrating roof with a2" PVC vent pipe, a2" electrical
conduit flashing may be used for a weather tight seal.
Lubricate flexible seal on flashing befl)re PVC pipe is pushed
through the seal. (Field Supplied)
NOTE:
No vent cap as shown in Figure 35 is the preferred method
for vertical vent termination in extremely cold climates.
In extreme climate conditions, insulate the exposed pipe
above the roof line with Armaflex type insulation.
VENTING ROUTED THROUGH A MASONRY CHIMNEY
VENT FITTING MATERIAL- STAINLESS STEEL
Gas and liquid tight single wall metal vent fitting, designed
for resistance to corrosive flue condensate such as Type 29-4C
MUST be used throughout.
These fittings and fitting accessories are to be supplied
locally.
DIRECTION OF STAINLESS STEEL FITTING
All stainless steel fitting must be installed with male end
towards the furnace.
All horizontal stainless steel sections must be positioned
with the seam on top.
®
®VENT
MAINTAIN 12 IN.
(18 IN. FOR CANADA)
ABOVE HIGHEST
ANTICIPATED SNOW
LEVEL. MAXIMUM OF
24 IN. ABOVE ROOF.
BAYAIR30AVENTA
®MAINTAIN 12 IN,
VENT (18 IN, FOR CANADA)
REMOVE RIBS _MINIMUM CLEARANCE
FROMCAP _[ ABOVE HIGHEST
ANTICIPATED SNOW
COMBUSTION LEVEL, MAXIMUM OF
AIR 24 IN, ABOVE ROOF
ROOF BOOT
(FIELD SUPPLIED)
(FIELD SUPPLIED)
ELBOW
(FIELD SUPPLIED)
COMBUSTION
All long horizontal sections must be supported to prevent
sagging.
All pipe joints must be fastened and sealed to prevent escape
of combustion products into the building.
20 18-CD19D6-27