1 8 - CD1 9 D6 - 3 2

Available in French Canadian (FC)

Installer’s Guide
Upflow/ Horizontal and Downflow/ Horizontal
Gas-Fired, Direct Vent Condensing Furnaces
*UX1B040A9241A *UX1C080A9601A *DX1B040A9241A
*UX1B060A9241A *UX1C100A9361A *DX1B060A9361A
*UX1B060A9361A *UX1C100A9481A *DX1B080A9421A
*UX1B080A9241A *UX1D100A9601A *DX1C100A9481A
*UX1B080A9421A *UX1D120A9601A *DX1D120A9601A
*__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.

*UX-1 *DX-1

DOWNFLOW

UPFLOW

UPFLOW/HORIZONTAL DOWNFLOW/HORIZONTAL

A341624P06

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 Installer’s Guide
SAFETY SECTION f. The furnace return air temperature range is
between 55 and 80 degrees Fahrenheit.
The following safety practices and precautions must be
g. Clean the furnace, duct work, and components
followed during the installation, servicing, and operation
upon substantial completion of the construction
of this furnace.
process, and verify furnace operating conditions
1. Use only with the type of gas approved for this fur-
including ignition, input rate, temperature rise
nace. Refer to the furnace rating plate.
and venting, according to the manufacturer's
2. Install this furnace only in a location and position as
instructions.
specified in “Location and Clearances” (page 4), of
these instructions.
10. This product must be gas piped by a Licensed
3. Provide adequate combustion and ventilation air to
Plumber or Gas Fitter in the Commonwealth of
the furnace space as specified in “Air for Combus-
Massachusetts.
tion and Ventilation” (pages 8-9), of these instruc-
tions.
4. Combustion products must be discharged outdoors.
Connect this furnace to an approved vent system ▲
! WARNING
only, as specified in the “Venting” section (starting CARBON MONOXIDE POISONING HAZARD
on page 15), of these instructions. Failure to follow the steps outlined below for each ap-
5. Never test for gas leaks with an open flame. Use a pliance connected to the venting system being placed
commercially available soap solution made specifi- into operation could result in carbon monoxide poi-
cally for the detection of leaks to check all connec- soning or death.
tions, as specified in “Gas Piping” (pages 31-33), of The following steps shall be followed for each appli-
these instructions. ance connected to the venting system being placed
into operation, while all other appliances connected to
6. Always install the furnace to operate within the
the venting system are not in operation:
furnace’s intended temperature-rise range with a 1. Seal any unused openings in the venting system.
duct system which has an external static pressure 2. Inspect the venting system for proper size and
within the allowable range, as specified on the unit horizontal pitch, as required in the National Fuel
rating plate. Airflow with temperature rise for cfm Gas Code, ANSI Z223.1/NFPA 54 or the CAN/CGA
versus static is shown in the Service Facts accompa- B149 Installation Codes and these instructions.
nying this furnace. Determine that there is no blockage or restriction,
7. When a furnace is installed so that supply ducts leakage, corrosion and other deficiencies which
carry air circulated by the furnace to areas outside could cause an unsafe condition.
3. As far as practical, close all building doors and
the space containing the furnace, the return air
windows and all doors between the space in which
shall also be handled by a duct(s) sealed to the fur- the appliance(s) connected to the venting system
nace casing and terminating outside the space con- are located and other deficiencies which could
taining the furnace. cause an unsafe condition.
8. A gas-fired furnace for installation in a residential 4. Close fireplace dampers.
garage must be installed as specified in “Location 5. Turn on clothes dryers and any appliance not con-
and Clearances” section (page 4), of these instruc- nected to the venting system. Turn on any exhaust
tions. fans, such as range hoods and bathroom exhausts,
so they are operating at maximum speed. Do not
9. The furnace may be used for temporary heating of
operate a summer exhaust fan.
buildings or structures under construction only 6. Follow the lighting instructions. Place the appli-
when the following conditions have been met: ance being inspected into operation. Adjust the
a. The furnace venting system must be complete thermostat so appliance is operating continuously.
and installed per manufacturers instructions. 7. If improper venting is observed during any of the
b. The furnace is controlled only by a room ther- above tests, the venting system must be corrected
mostat (no field jumpers). in accordance with the National Fuel Gas Code,
c. The furnace return air duct must be complete ANSI Z221.1/NFPA 54 and/or CAN/CGA B149.1 In-
and sealed to the furnace and clean air filters stallation Codes.
8. After it has been determined that each appliance
are in place.
connected to the venting system properly vents
d. The furnace input rate and temperature rise where tested as outlined above, return doors, win-
must be verified to be within nameplate mark- dows, exhaust fans, fireplace dampers and any
ing. other gas-fired burning appliance to their previous
e. 100% of the furnace combustion air require- conditions of use.
ment must come from outside the structure.

© 2008 Trane All Rights Reserved 18-CD19D6-32

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 Installer’s Guide
Safety signal words are used to designate a degree or
level of seriousness associated with a particular hazard.
Contents
The signal words for safety markings are WARNING and
CAUTION.
INSTALLATION INSTRUCTIONS
a. WARNING indicates a potentially hazardous situa- General Installation Instructions 3
tion which, if not avoided, could result in death or Location and Clearances 4
serious injury. Outline Drawings 5
b. CAUTION indicates a potentially hazardous situation Upflow Installation 7
which, if not avoided, may result in minor or mod- Downflow Installation 7
erate injury. It is also used to alert against unsafe Horizontal Installation 7
practices and hazards involving only property dam- Air For Combustion and Ventilation 8
age. Duct Connections 10
Return Air Filters 11
▲
! WARNING General Venting Instructions 15
Venting Material 16
FIRE OR EXPLOSION HAZARD
Failure to follow the safety warnings exactly could re- Venting Tables 17-19
sult in serious injury, death or property damage. Horizontal Venting 20
Improper servicing could result in dangerous opera- Venting Through The Wall 20
tion, serious injury, death, or property damage. Venting Through The Roof 23
Downward Venting 23
GENERAL INSTALLATION INSTRUCTIONS Venting Through a Masonry Chimney 23
The manufacturer assumes no responsibility for equip- Condensate Drain Instructions 26
ment installed in violation of any code or regulation. Electrical Connections 29
It is recommended that Manual J of the Air Condition- Field Wiring Diagrams 28-30
ing Contractors Association (ACCA) or A.R.I. 230 be fol- Gas Piping 31
lowed in estimating heating requirements. When esti- Combustion Input Checks 32
mating heating requirements for installation at alti-
tudes above 2000 ft., remember the gas input may need Start Up and Adjustment 35
to be reduced (See High Altitude Installation). Preliminary Inspections 35
Material in this shipment has been inspected at Lighting Instructions 35
the factory and released to the transportation Sequence Of Operation 36
agency without known damage. Inspect exterior Control And Safety Switch Adjustments 36
of carton for evidence of rough handling in ship- Airflow Adjustment 36
ment. Unpack carefully after moving equipment
to approximate location. If damage to contents is Abnormal Conditions 37
found, report the damage immediately to the de- IFC Error Flash Code 39
livering agency.
Codes and local utility requirements governing the Category IV furnaces operate with positive vent static
installation of gas fired equipment, wiring, plumbing, pressure and with a flue loss less than 17 percent.
and flue connections must be adhered to. In the ab- These conditions require special venting systems, which
sence of local codes, the installation must conform with must be gas tight and water tight. These Category IV
latest edition of the National Fuel Gas Code ANSI Direct Vent furnaces are approved for installation in
Z223.1 • National Installation Code, CAN/CGA B149.1. Manufactured/ Mobile housing when used with
The latest code may be obtained from the American Gas BAYMFGH100A.
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.

18-CD19D6-32 3

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 Installer’s Guide
▲
! CAUTION LOCATION AND CLEARANCES
To prevent shortening its service life, the furnace The location of the furnace is normally selected by the
should not be used as a “Construction Heater” during architect, the builder, or the installer. However, before
the finishing phases of construction until the require- the furnace is moved into place, be sure to consider the
ments listed in item 9, a-g of the safety section of this following requirements:
publication have been met. Condensate in the pres- 1. Is the location selected as near the vent and as cen-
ence of chlorides and fluorides from paint, varnish, tralized for heat distribution as practical?
stains, adhesives, cleaning compounds, and cement 2. Do all clearances between the furnace and enclo-
create a corrosive condition which may cause rapid de-
sure equal or exceed the minimums shown in the
terioration of the heat exchanger.
Table 1.
▲
! CAUTION
3. Is there sufficient space for servicing the furnace
and other equipment? A minimum of 24 inches
Do NOT install the furnace in a corrosive or contami- front accessibility to the furnace must be provided.
nated atmosphere. Any access door or panel must permit removal of
the largest component.
▲
! WARNING 4. Are there at least 3 inches of clearance between the
EXPLOSION HAZARD! furnace front panel and any closed panel or door
PROPANE GAS IS HEAVIER THAN AIR AND MAY provided?
COLLECT IN ANY LOW AREAS OR CONFINED 5. Are the vent pipe and combustion air inlet pipe
SPACES. IN ADDITION, ODORANT FADE MAY MAKE within vent table lengths? Will the pipes remain un-
THE GAS UNDETECTABLE EXCEPT WITH A WARN- obstructed?
ING DEVICE. IF THE GAS FURNACE IS INSTALLED 6. Allow sufficient height in supply plenum above or
IN A BASEMENT, AN EXCAVATED AREA OR A below the furnace to provide for cooling coil installa-
CONFINED SPACE, IT IS STRONGLY RECOM- tion if the cooling coil is not installed at the time of
MENDED TO CONTACT A GAS SUPPLIER TO IN- this furnace installation.
STALL A GAS DETECTING WARNING DEVICE IN 7. A furnace shall be installed so electrical components
CASE OF A GAS LEAK. are protected from water.
NOTE: The manufacturer of your furnace does NOT test 8. If the furnace is installed in a residential garage,
any detectors and makes no representations regarding it must be installed so that the burners and the ig-
any brand or type of detector. nition 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 ve-
hicles.

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 drain-
age.

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 Installer’s Guide

From Dwg. 21C341884 Rev. 6

*UX-C OUTLINE DRAWING
(ALL DIMENSIONS ARE IN INCHES)

18-CD19D6-32 5

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 6
*DX-C DOWNFLOW / HORIZONTAL OUTLINE DRAWING
(ALL DIMENSIONS ARE IN INCHES)

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Installer’s Guide

From Dwg. 21C341885 Rev. 6

18-CD19D6-32
 Installer’s Guide
123456789012345678901234567890121234567890123456
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UPFLOW INSTALLATION 123456789012345678901234567890121234567890123456
Standoffs and screws (See Figure 1) are included with 3
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the cased coils for attachment to the furnace. There are 123456789012345678901234567890121234567890123456
A (width)
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clearance alignment holes near the bottom of the coil 123456789012345678901234567890121234567890123456
B (depth)
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FURNACE
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wrapper. Drill screws are used to engage the furnace 123456789012345678901234567890121234567890123456
FRONT
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D
top flanges. The standoff is inserted into the cabinet 123456789012345678901234567890121234567890123456
123456789012345678901234567890121234567890123456
C
123456789012345678901234567890121234567890123456
alignment hole. The drill screws are inserted through 123456789012345678901234567890121234567890123456
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the standoffs then screwed into the furnace flange. 123456789012345678901234567890121234567890123456
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The coil is always placed downstream of the furnace air-
flow. HORIZONTAL INSTALLATION
The coil and furnace must be fully supported when used
1 STANDOFFS (4) DRILL SCREWS (4) in the horizontal position. It is always recommended
that an auxiliary drain pan be installed under a horizon-
tally installed evaporator coil or 90% gas furnace. Con-
nect the auxiliary drain line to a separate drain line (no
trap is needed in this line).
Three brackets (with screws) are included with down-
flow furnaces for installation to stabilize and secure the
CA
SE FOR VERTICAL furnace and TXC cased coil in the horizontal posi-
CO D
IL INSTALLATIONS: tion. 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.
SCREWS The cased coil is secured to the furnace and both the
UP (BOTH SIDES)
FU FLO furnace and the cased coil must be properly supported.
RN W
AC
E STANDOFFS The brackets mount using the rear screws on the coil
(BOTH SIDES)
case and use the screws provided to secure the bracket
to the furnace. The remaining bracket is placed as close
DOWNFLOW INSTALLATIONS to center as possible (horizontally) between the coil case
front and the furnace bottom channel (for downflow/
▲
! WARNING horizontal furnace). Use four of the screws provided to
Do NOT install the furnace directly on carpeting, tile or secure the bracket. The upflow furnace, converted to
other combustible material other than wood flooring. horizontal, aligns and attaches the TXC coil as in Fig-
For vertical downflow application, subbase (BAYBASE- ure 1. However, the coil requires additional support.
205) must be used between the furnace and combus-
tible flooring. When the downflow furnace is installed
vertically with a cased coil, a subbase is not required.
4 CASED COIL CONNECTION
Required floor opening: 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 posi-

2 SUBBASE CROSS SECTION

tion). 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
TABLE 1 the front of the furnace (See Figure 5 & Clearance
CABINET RETURN FLOOR OPENING PLENUM OPENING Table). Line contact is only permissible between lines
WIDTH DUCT WIDTH "A" "B" "C" "D" formed by intersections of the top and two sides of the
17-1/2" 16-1/4" 16-5/8" 20-1/8" 15-5/8" 19-3/8" furnace casing and building joists, studs, or framing.
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"

18-CD19D6-32 7

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 Installer’s Guide
Provisions for combustion and ventilation air shall be
5 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 ap-
plicable provisions of the local building codes. Special
conditions created by mechanical exhausting of air and
fireplaces must be considered to avoid unsatisfactory
furnace operation.
OUTSIDE AIR IS RECOMMENDED
UPFLOW/ The use of indoor air for most applications is acceptable,
HORIZONTAL unless there is the presence of corrosive chemicals
SHOWN or contamination. Certain types of installation will
require the use of outside air for combustion.
The furnace may be placed horizontally in a crawl space The following types of installations will require use of
on a pad or other noncombustible material which will OUTDOOR AIR for combustion, due to chemical expo-
raise the unit for sufficient protection from moisture. sures:
The furnace must be supported at both ends and * Commercial buildings
the middle when installed horizontally. * Buildings with indoor pools
The furnace must also be elevated a minimum of 6 * Furnaces installed in “confined” laundry rooms
inches to allow clearance for the condensate drain * Furnaces installed in “confined” hobby or craft rooms
to exit the cabinet in the horizontal position. * Furnaces installed near chemical storage areas.
The horizontal furnace may also be suspended from the Exposure to the following substances in the combustion
joists using 3/8" all-thread rods with pieces of angle iron air supply will also require OUTDOOR AIR for combus-
underneath the furnace to form a hanging rack at both tion:
ends and the midpoint. The rods need to be of sufficient * Permanent wave solutions
length to allow for proper clearances from combustible * Chlorinated waxes and cleaners
materials. The angle iron needs to be at least 32" in * Chlorine based swimming pool chemicals
length to allow for access to service panels. * Water softening chemicals
* Deicing salts or chemicals
* Carbon Tetrachloride
6 * Halogen type refrigerants
* Cleaning solvents (such as perchloroethylene)
50 CU. FT. OR MORE * Printing inks, paint removers, varnish, etc.
PER 1000 BTU/HR. INPUT * Hydrochloric acid
ALL EQUIP. INSTALLED
* Cements and glues
* Antistatic fabric softeners for clothes dryers
* Masonry acid washing materials
UNCONFINED Furnace locations may be in a “confined space” or an
“unconfined space”.
AIR FOR COMBUSTION AND VENTILATION Unconfined space is defined in Figure 6. These spaces
If these furnaces are installed in a nondirect vent capac- may have adequate air by infiltration to provide air for
ity then the adequate flow of combustion and ventilat- combustion and ventilation. Buildings with tight
ing air must not be obstructed from reaching the fur- construction (for example, weather stripping, heavily
nace. Air openings provided for combustion air must be insulated, caulked, vapor barrier, etc.), may need addi-
kept free of obstructions which restrict the flow of air. tional air to be provided as described for confined space.
Airflow restrictions affect the efficiency and safe opera- Confined spaces are installations with less than 50 cu.
tion of the furnace. Keep this in mind should you ft. of space per 1000 BTU/hr input from all equipment
choose to remodel or change the area which contains installed. Air for combustion and ventilation require-
your furnace. Furnaces must have a free flow of air for ments can be supplied from inside the building as in
proper performance. Figure 8 or from the outdoors, as in Figure 9.

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 Installer’s Guide
MINIMUM AREA IN SQUARE FEET 8
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

7
CONFINED 9
SPACE

1. All air from inside the building as in Figure 8: The

confined space shall be provided with two perma-
nent openings communicating directly with an addi-
tional room(s) of sufficient volume so that the com-
bined volume of all spaces meets the criteria for an
unconfined space. The total input of all gas utiliza-
tion equipment installed in the combined space
shall be considered in making this determination.
Refer to Table 2 for minimum open areas require-
ments.
2. All air from outdoors as in Figure 9: The confined
space shall be provided with two permanent open-
ings, one commencing within 12 inches of the top
and one commencing within 12 inches of the bot-
tom of the enclosure. The openings shall communi-
cate 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 2
MINIMUM FREE AREA IN SQUARE INCHES
EACH OPENING (FURNACE ONLY)

Furnace Air From Outside

Air
Maximum
From
BTUH/INPUT
Inside Vertical Horizontal
Rating
Duct Duct
60,000 100 15 30
80,000 100 20 40
100,000 100 25 50
120,000 120 30 60

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 Installer’s Guide
DUCT CONNECTIONS NOTE:
Minimum return air temperature is 55° F.
Air duct systems should be installed in accordance with
standards for air conditioning systems, National Fire 3. The side panels on upflow furnaces include locating
Protection Association Pamphlet No. 90. They should notches which may be used as guides for cutting an
be sized in accordance with ACCA Manual D or which- opening for return air. Refer to Figure 12 and the
ever is applicable. outline drawing on page 5 for duct connection
Central furnaces, when used in connection with cooling dimensions for various furnaces.
units, shall be installed in parallel or on the upstream
side of the cooling coil to avoid condensation in the heat 4. If a 3/4" flange is to be used for attaching the air
exchanger. With a parallel flow arrangement, the damp- inlet duct, add to cut where indicated by dashed
ers or other means used to control flow of air shall be lines in Figure 12. Cut corners diagonally and bend
adequate to prevent chilled air from entering the fur- outward to form flange.
nace, and if manually operated, must be equipped with 5. If flanges are not required, and a filter frame is
means to prevent operation of either unit unless the installed, cut along knockout guidelines.
damper is in full heat or cool position. 6. Upflow Furnaces: Use the optional filter rack on
On any job, flexible connections of nonflammable mate- either side or on the bottom if the filter is to be
rial may be used for return air and discharge connections used within the furnace cabinet.
to prevent transmission of vibration. Though these units
have been specifically designed for quiet, vibration free When the upflow furnace is installed in the horizon-
operation, air ducts can act as sounding boards and could, tal right or left application and a return duct is
if poorly installed, amplify the slightest vibration to the attached to the top side as shown in Figure 11,
annoyance level. install the filter in a remote location.
When the furnace is located in a utility room adjacent Do not install the filter in the return duct directly
to the living area, the system should be carefully de- above the furnace in horizontal applications.
signed with returns to minimize noise transmission
through the return air grille. Although these furnaces
are designed with large blowers operating at moderate ▲
! WARNING
speeds, any blower moving a high volume of air will Do not install the filter in the return duct directly above the
produce audible noise which could be objectionable furnace in horizontal applications. Install the filter remotely.
when the unit is located very close to a living area. It is Installing the filter directly above the furnace in horizontal
often advisable to route the return air ducts under the applications may cause property damage, serious injury or
floor or through the attic. Such design permits the in- death.
stallation of air return remote from the living area
(i.e. central hall). ▲
! WARNING
When the furnace is installed so that the supply ducts TO PREVENT INJURY OR DEATH DUE TO CONTACT
carry air circulated by the furnace to areas outside the WITH MOVING PARTS, TURN THE POWER TO THE
space containing the furnace, the return air shall also FURNACE OFF BEFORE SERVICING FILTERS.
be handled by a duct(s) sealed to the furnace and termi-
nating outside the space containing the furnace. When the upflow furnace is installed in the horizon-
RETURN AIR DUCT CONNECTION tal right or left application and a close coupled (less
than 36") return duct is attached to the bottom side
NOTE:
of the furnace as shown in Figure 11, securely
On upflow 5 or 6 ton airflow models where the
airflow requirement exceeds 1800 CFM - Models will attach a 1/2" mesh metal hardware cloth protective
require return air openings and filters on: (1) both screen to the inside bottom of the filter grill to
sides; or (2) one side and the bottom; or (3) just the prevent personal injury from contacting
bottom. moving parts when reaching into the return
opening to replace the filter.
All return air duct systems should provide for installa-
Close coupled (less than 36") return (filter directly
tion of return air filters.
beneath bottom side return) is not recommended
1. Determine the appropriate position to set the due to noise considerations.
furnace in order to connect to the existing supply
Downflow Furnaces: Brackets are factory
and return ductwork.
supplied to mount filters in the return air duct
2. For side return installations on upflow models, work.
remove the insulation around the opening in the
blower compartment.

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 Installer’s Guide
REMOVE FILTER FROM UPFLOW
FURNACE WHEN RETURN DUCT IS q w * CUT OUT
ATTACHED TO FURNACE TOP SIDE FOR
(HORIZONTAL LEFT OR RIGHT SIDE
APPLICATIONS) AS SHOWN. LOCATING FILTER
FILTER NOTCHES *
PROVIDED
FOR SIDE
RETURN
CUTOUT
* FRONT
* of Furnace
Close coupled (less than 36") *SEE OUTLINE DRAWING
return (filter directly beneath bottom
side return) not recommended due to
noise considerations. If used, securely
RETURN AIR FILTERS
attach 1/2" mesh metal hardware cloth (Filter and filter rack are not supplied with unit)
protective screen to the inside bottom of TYPICAL UPFLOW RETURN AIR FILTER INSTALLA-
filter grill.
TIONS
These furnaces require high velocity type air filters.
7. Connect the duct work to the furnace. See Outline The optional filters may be located within the furnace
Drawing (pages 4&5) for supply and return duct size blower compartment for UPFLOW furnaces in either a
and location. Flexible duct connectors are recom- BOTTOM or SIDE (left side or right side) return air
mended to connect both supply and return air ducts inlet. Some optional filters may need to be trimmed for
to the furnace. side or bottom filter use.
If only the front of the furnace is accessible, it is NOTE:
recommended that both supply and return air
plenums are removable. On upflow 5 or 6 ton airflow models where the
airflow requirement exceeds 1800 CFM - Models will
8. When replacing a furnace, old duct work should be
require return air openings and filters on: (1) both
cleaned out. Thin cloths should be placed over the
sides; or (2) one side and the bottom; or (3) just the
registers and the furnace fan should be run for
bottom.
10 minutes. Don’t forget to remove the cloths
before you start the furnace. The furnace and the blower filter rack installation can
be seen in Figure 13.
The optional furnace filter in the bottom or side con-
figuration 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 adjust-
ment to allow standard size, locally obtainable replace-
ment filters. The filter rack itself slides to adjust to the
required width needed for bottom or side return.

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"

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 Installer’s Guide
TABLE 4 NOTE: The narrow 14.5" width furnace cabinet prevents use
UPFLOW FURNACE RETURN AIR FILTERS of the filter rack for right side return. Pre-drill clearance
holes and then attach filter clips with the screws provided.
CABINET CABINET CABINET The filter clip with the leaf spring mounts in the rear of the
QTY*
WIDTH BOTTOM FILTER SIDE FILTER
cabinet
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" OPTIONAL FILTER RACK INSTALLATION FOR BOTTOM
RETURN
21" 1 20" X 25" X 1" 17-1/2" X 25" X 1"
With the filter removed, the filter rack is compressed and
24-1/2" 1 24" X 25" X 1" 17-1/2" X 25" X 1" then inserted into the bottom of the furnace. The retaining
**NOTE: For upflow 5 ton airflow models where the airflow screw/pin on each side inserts into engagement holes at the
requirement exceeds 1800 CFM - Models will require return air bottom of the furnace cabinet side. See Figures 13, 14 & 16.
openings and filters on: (1) both sides, or (2) one side and the
bottom, or (3) just on the bottom
NOTE: Remove the bottom front channel to install the filter
rack in the 14-1/2" width cabinet furnaces.

Airf low t

Blower Deck
Engagement
Hole

e
V
IE
W
ENGAGEMENT
HOLE DETAIL
(Typical both sides
and blower deck)

Airf low y Furnace

Filter
Rack
Cabinet
Side
BOTTOM FILTER RACK INSTALLATION

r Filter Rack
Retaining
Screw/Pin
Engagement Hole
For Filter Rack
Installation With
Bottom Return

Optional Filter Rack Accessory Kit

BAYRACK960A
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 Installer’s Guide
TABLE 5
Cabinet Width Left Side Bottom Right Side o SIDE
CUTOUT
1 2
14.5 X X Use Alternate Filter Clips Only
17.5 X X X Airfl
ow
21 X X X
RETAINING
24.5 X X X
PIN
1. UD060C/R936K0 has 10x7 blower which requires use of alternate (Both Sides)
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
SPRINGS
RETURN AIR ON UPFLOW FURNACES (Left or Right)
If side air return is desired, the following instructions should
be used:
FILTER BOTTOM
a. Open or remove the blower door. PANEL
RACK
b. Leave the bottom panel in place. (Some models RAILS INSTALLED
require field supplied bottom panels.)
c. After the side cutout is made following the directions
in the “Return Air Duct Connections” section on
pages 8 and 9; compress the filter rack and reinstall in Typical Upflow Left Side Return Filter Rack Installation
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, 15, &
p SIDE
CUTOUT
17-20.
d. Install the furnace filter on the side. See Figures 14, low
Airf
15, & 17-20. RETAINING
PIN
u BOTTOM ENGAGEMENT
Filter Rack
(Both Sides)

Retaining
Furnace Screw/Pin Filter
Cabinet Rack
Side
SPRINGS

BOTTOM
FILTER
Engagement Hole PANEL
For Filter Rack RACK
Installation With INSTALLED
Bottom Return RAILS

Bottom Panel
Typical Upflow Right Side Return Filter Rack Installation

i
BLOWER
Engagement Hole
For Filter Rack
Furnace
Blower
a
Installation With
Deck
DECK Side Return

Furnace Airflo
Cabinet
w
Side

Filter Rack Filter

Retaining Rack
Screw/Pin Assembly

Optional door kit

BAYFLTR206
Typical Horizontal Filter Installation

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 Installer’s Guide
RETURN AIR FILTERS FOR UPFLOW FURNACE TYPICAL DOWNFLOW FURNACE
IN HORIZONTAL CONFIGURATION RETURN AIR FILTER INSTALLATIONS
When the Upflow Furnace is installed in a horizontal configu-
ration, the filter must never be installed inside or outside the i
cabinet directly above the blower assembly. See Figure 11
(page 9). Remote filter grilles may be used for homeowner
d
convenience or the filters may be installed in the duct work
upstream of the furnace. See Figures 11 (page 9) and 21 (page
11).
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 w
Airflo
using the screws provided. The filter clip with the leaf
spring mounts in the rear of the cabinet. See Figure 22.

s
REAR

f
DE
SI OUT
-
C UT

ALTERNATE FILTER
ow
CLIPS LOCATION Airfl

Optional door kit

BAYFLTR206

Optional horizontal filter conversion kits are BAYFLTR203

for 17 1/2" width cabinets, BAYFLTR204 for 21" width Two high velocity type air filters are required for each down-
cabinets, and BAYFLTR205 for 24" width cabinets. These flow furnace. Downflow furnace filters must be located
include filters and brackets necessary for horizontal filters. outside the furnace cabinet. Typical installations are shown
In addition, optional door kit BAYFLTR206 is also available. in Figures 23 and 24. Tables 7 and 8 (page 13) provide
See Figures 21 and 24. information for installation of the filter retaining brackets
shipped with downflow furnaces.
INSTALLING THE OPTIONAL FILTER
The filter may need to be cut to fit the unit depending on the
TABLE 7
location of the return air filter.
CABINET FILTER FILTER BRACKET
A score line and the words “CUT HERE” are located on the WIDTH SIZE LOCATION *
end of the filter. If your application requires cutting the filter,
do so as indicted by the score mark. 14-1/2" 2 - 14X20X1 12-7/8"
17-1/2" 2 - 16X20X1 14-3/8"
TABLE 6 21" 2 - 16X20X1 13-1/8"
UNIT RETURN AIR 24-1/2" 2 - 16X20X1 11-5/8"
* Location dimension is from end of duct to the screw holes for the bracket.
SIZE BOTTOM SIDE
14-1/2" CUT ON LINE DO NOT CUT TABLE 8

CABINET RETURN FILTER ACCESS FILTER ACCESS

17-1/2" DO NOT CUT DO NOT CUT DUCT OPENING - OPENING -
WIDTH WIDTH DIMENSION "A" DIMENSION "B"
21" DO NOT CUT CUT ON LINE
14-1/2" 13-1/4" 12" 14"
24-1/2" DO NOT CUT CUT ON LINE 17-1/2" 16-1/4" 15" 14"
21" 19-3/4" 19-1/2" 14"
24-1/2" 23-1/4" 22" 14"

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 Installer’s Guide
GENERAL VENTING The following steps shall be followed with each appli-
ance remaining connected to the common venting sys-
IMPORTANT:
tem placed in operation, while the other appliances re-
These furnaces may be installed as Direct Vent (sealed
combustion) or as Nondirect vent (single pipe). The fur- maining connected to the common venting system are
naces are shipped DIRECT VENT with sealed combus- not in operation.
tion. 1. Seal any unused openings in the common venting
For DIRECT VENT APPLICATION: The furnaces must be system.
vented to the exterior of the house and combustion air 2. Visually inspect the venting system for proper size
MUST come through the inlet air pipe FROM OUTSIDE and horizontal pitch and determine there is no
AIR. blockage or restriction, leakage, corrosion or other
For NONDIRECT VENT APPLICATION: The furnace shall deficiencies which could cause an unsafe condition.
be vented to the exterior of the house, but combustion air 3. Insofar as is practical, close all building doors and
may enter from the surrounding area as long as combus- windows and all doors between the space in which
tion air requirements are met. (See AIR FOR COMBUS- the appliances remaining connected to the common
TION AND VENTILATION) venting system are located and other spaces of the
building. Turn on clothes dryers and any appliances
THIS FURNACE MUST BE VENTED TO THE OUT- not connected to the common venting system. Turn
DOORS. on any exhaust fans, such as range hoods and bath-
THESE FURNACES ARE INDUCED DRAFT VENTED room exhausts, so they will operate at maximum
AND MUST NOT BE CONNECTED TO ANY VENT speed. Do not operate a summer exhaust fan, close
SERVING ANOTHER APPLIANCE. PLEASE NOTE fireplace dampers.
THAT THESE FURNACES USE POSITIVE- 4. Follow the lighting instructions. Place the appliance
PRESSURE VENT SYSTEMS. being inspected in operation. Adjust thermostat so
Proper venting is essential to obtain maximum effi- appliance will operate continuously.
ciency from a condensing furnace. Proper installation 5. Test for spillage at the draft hood relief opening af-
of the vent system is necessary to assure drainage of ter 5 minutes of main burner operation. Use the
the condensate and prevent deterioration of the vent flame of a match or candle, or smoke from a ciga-
system. rette, cigar, or pipe.
American Gas Association has certified the design of 6. After it has been determined that each appliance re-
condensing furnaces for a minimum of 0" clearance maining connected to the common venting system
from combustible materials with a single wall plastic properly vents when tested as outlined above, re-
vent pipe. turn door, windows, exhaust fans, fireplace dampers
The recommended system is assembled from 2", 2-1/2", and any other gas-burning appliance to their previ-
or 3" plastic pipe and fittings (See Table 9, page 17). ous conditions of use.
Where the system is routed to the outdoors through an If improper venting is observed during any of the above
existing masonry chimney containing flue products tests, the remaining common venting system must be
from another gas appliance, or where required by local corrected. Correction of the remaining common vent
codes, then 3" venting of Type 29-4C stainless steel system should be done by referring to the latest edition
must be used in place of PVC material. of the National Fuel Gas Code (ANSI Z223.1) • CAN/
These furnaces have been classified as CATEGORY IV CGA B149.1 Installation Codes or “Exhibit J” of
furnaces in accordance with the latest edition of ANSI Z21.47 • CAN/ CGA-2.3 Standards. The following
ANSI Z21.47 • CAN/ CGA-2.3 Standards. Category IV are general steps to be used to correct or resize a re-
furnaces operate with positive vent pressure and with a maining vent system when a furnace which may not be
vent gas temperature less than 140°F above the common vented is removed from the system:
dewpoint. These conditions require special venting sys- a. Determine the Btu per hour input of all remain-
tems, which must be gas tight and water tight. ing appliances attached to the venting system.
b. Determine the diameter, rise, and lateral of the
NOTE:
When an existing furnace is removed from a venting existing venting system, as well as quantity and
system serving other gas appliances, the venting sys- type of bends.
tem is likely to be too large to properly vent the re- c. Use the appropriate tables in the latest edition of
maining attached appliances. the National Fuel Gas Code (ANSI Z223.1 •
CAN/ CGA B149.1 Installation Codes or “Exhibit
J” of ANSI Z21.47 • CAN/ CGA-2.3 Standards.
“Exhibit J” includes examples and drawings of
typical venting systems.

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 Installer’s Guide
PVC VENT FITTING MATERIAL 2. After checking pipe and socket for proper fit, wipe
These fittings are available from your Gas Furnace socket and pipe with cleaner-primer. Apply a liberal
Distributors. coat of primer to inside surface of socket and out-
Straight Pipe Sections, Couplings, 45° Elbows, 60° El- side of pipe.
bows, 90° Elbows, Vent or Sanitary Tee, or other neces- DO NOT ALLOW PRIMER TO DRY BEFORE AP-
sary fittings may be 2", 2½", 3", or 4" diameter. The al- PLYING CEMENT.
lowable materials are shown in Table 8. 3. Apply a thin coat of cement evenly in the socket.
VENT FITTING MATERIAL – PLASTIC Quickly apply a heavy coat of cement to the pipe
Gas and liquid tight single wall vent fittings, designed end and insert pipe into fitting with a slight twisting
for resistance to corrosive flue condensate, MUST be movement until it bottoms out.
used throughout. 4. Hold the pipe in the fitting for 30 seconds to pre-
Listed in Table 10 & 11 are 2", 2½", 3", and 4" size fittings vent tapered socket from pushing the pipe out of
that meet these requirements. The materials listed are the fitting.
various grades of PVC and ABS plastic. 5. Wipe all excess cement from the joint with a rag.
PIPE JOINTS: All joints must be fastened and sealed to Allow 15 minutes before handling. Cure time varies
prevent escape of combustion products into the build- according to fit, temperature and humidity.
ing.
NOTE:
NOTE: Follow venting instructions carefully when using PVC
It is recommended that the first joints from the furnace cement.
be connected and sealed with high temperature RTV.
This will enable the pipes to be removed later without IMPORTANT:
cutting. All joints must be water tight. Flue condensate is some-
Be sure to properly support these joints. what acidic, and leaks can cause equipment damage.
BONDING OF PVC Connection of the pipe and collar of the combustion
Commercially available solvent cement must be used to air inlet should just be a friction fit. It is recommended
join the pipe and fittings. Follow instructions on the that the inlet air joint be sealed with RTV type sealant
container carefully. to allow the joint to be separated for possible future ser-
Procedure for Cementing Joints: vice. The inlet and vent pipes must be properly sup-
1. Cut pipe square, remove ragged edges and burrs. ported throughout the entire length.
Chamfer end of pipe, then clean fitting socket and
pipe joint area of all dirt, grease, moisture or chips.

TABLE 9
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)]

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 Installer’s Guide
Connection of the vent pipe to the vent collar should
also be accomplished using RTV type sealant. This type g VENT AND INLET AIR CONNECTIONS
Seal VENT PIPE
sealant provides a connection which remains flexible with RTV sealant
and can be separated in the future if service needs re-
quire the removal of the vent pipe for service or clear-
ance.

NOTE:
To ensure proper operation at the vent lengths indi-
cated, the combustion air inlet and vent terminals
should be in the same pressure zone. Terminating the Front of Furnace

vent and inlet in different pressure zones will change

the maximum vent lengths and may cause nuisance Seal INLET AIR PIPE
tripping of the pressure switch(es). The amount of with RTV sealant
change can not be predicted. The selection of the inlet
and outlet terminal locations are the responsibility of IMPORTANT:
the designer/installer. If the installer chooses separate
pressure zones for the terminals, the combustion air Products installed in Canada must use vent systems
inlet termination must be in the higher (more positive) that are certified to the Standard for Type BH Gas Vent-
pressure zone. ing Systems (ULC S636) for Class II-A venting systems
(up to 65°C). Components of the vent system must not
be interchanged with other vent systems or unlisted
pipe or fittings. Plastic components, specified prim-
ers, and glues must be from a single system manufac-
turer and not intermixed with other system
manufacturer's vent system parts. In addition, the first
three feet of the vent pipe must be visible for inspec-
tion.

UPFLOW/ HORIZONTAL VENTING TABLE

TABLE 10
MAXIMUM VENT LENGTH:
DIRECT VENT (2 PIPE SYSTEM) - NONDIRECT 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
*UX1B040A9241A 60 80 100 130 50 80 80 130
*UX1B060A9241A 60 80 100 130 50 80 80 130
*UX1B060A9361A 60 80 100 130 50 80 80 130
*UX1B080A9241A 50 80 100 130 40 80 80 130
*UX1B080A9421A 50 80 100 130 40 80 80 130
*UX1C080A9601A NOT ALLOWED 60 100 130 NOT ALLOWED 60 80 130
*UX1C100A9361A NOT ALLOWED 40 100 130 NOT ALLOWED 40 80 130
*UX1C100A9481A NOT ALLOWED 40 100 130 NOT ALLOWED 40 80 130
*UX1D100A9601A NOT ALLOWED 40 100 130 NOT ALLOWED 40 80 130
*UX1D120A9601A 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 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 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.

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 Installer’s Guide
DOWNFLOW/ HORIZONTAL VENTING TABLE
TABLE 11
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
*DX1B040A9241A 60 80 100 130 50 80 80 130
*DX1B060A9361A 50 80 100 130 50 80 80 130
*DX1B080A9421A 45 80 100 130 40 80 80 130
*DX1C100A9481A 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 DOWNFLOW

UPFLOW FURNACE Air Inlet
A (0-2') or greater
FURNACE
B
B (0-2') or greater
A+B = 2' minimum
Vent only
Air Inlet to outside
A
A
Vent only A = 2' minimum
to outside
h

INSIDE
CORNER DETAIL

H
D

E
V
B
C
V B FIXED
I
L
V CLOSED
B FIXED V
OPERABLE CLOSED
V
OPERABLE M
F V B X
V X
V
B J
B A K

j V VENT TERMINAL X AIR SUPPLY INLET AREA WHERE TERMINAL IS NOT PERMITTED

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 Installer’s Guide
Table 12 - See Figure 27

Direct Vent Terminal Clearances

Canadian Installations US Installations

Clearance above grade, veranda, porch, deck, or

A= 12 inches (30 cm) 12 inches (30 cm)
balcony

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 * *

F= 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
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 =/<
J=
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

L= 7 feet (2.13 m) † *
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/NFPA 54 National Fuel Gas Code.
†. 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.

Table 12A - See Figure 27

Non-Direct Vent Terminal Clearances

Canadian Installations US Installations

Clearance above grade, veranda, porch, deck, or

A= 12 inches (30 cm) 12 inches (30 cm)
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 * *

F= 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

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
J=
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

L= 7 feet (2.13 m) † 7 feet (2.13 m)
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/NFPA 54 National Fuel Gas Code.
†. 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.

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 Installer’s Guide
k

ELBOW AND TEE MUST

BE AS CLOSE TO-
GETHER
AS POSSIBLE

POSSIBLE CONFIGURATIONS FOR TWO PIPE VENTING SYSTEMS

HORIZONTAL VENTING
NOTE:
l
ANCHORS
Vent termination kit BAYAIR30AVENTA or (4 req.)
"
BAYVENT200B may be used instead of the horizontal 7.2
VENT
and vertical termination options shown in the follow- PLATE
VENT
ing figures. 3.2" 12" MINIMUM
TO OVERHANG

▲! CAUTION COMBUSTION
AIR
SCREWS
When the vent pipe is exposed to temperatures below (4 req.)

freezing, i.e., when it passes through unheated spaces,

etc., the pipe must be insulated with 1/2 inch (22.7 mm) VENT
thick Armaflex-type insulation or equal. If the space is VENT
heated sufficiently to prevent freezing, then the insula- CAP
MAINTAIN 12" (18" FOR CANADA) MINIMUM
tion would not be required. If domestic water pipes are CLEARANCE ABOVE HIGHEST ANTICIPATED
SNOW LEVEL OR GRADE WHICHEVER IS GREATER
not protected from freezing then it is assumed the
space meets the condition of a heated space.
BAYVENT200B
HORIZONTAL VENTING THROUGH WALL
These furnaces may be installed as direct vent (as The vent & inlet terminals must be located at least 12"
shipped) or as nondirect vent. Installation must minimum above normally expected snow accumulation
conform to national, state, and local codes. level.
Avoid areas where staining or condensate drippage may
be a problem.
Location of the vent/ wind terminal should be chosen to
meet the requirements of Figure 27 for either direct or
non-direct vent applications.

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 Installer’s Guide
PITCH – Venting through the wall must maintain 1/4"
per foot pitched upward to insure that condensate z
drains back to the furnace.
FLUE GAS DEGRADATION – The moisture content
of the flue gas may have a detrimental effect on some
building materials. This can be avoided by using the
roof or chimney venting option. When wall venting is
used on any surface that can be affected by this mois-
ture, it is recommended that a corrosion resistant
shield (24 inches square) be used behind the vent termi-
nal. This shield 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 31.

;
x
12" MIN TO
OVERHANG

1" 1 "
2

COMBUSTION
AIR VENT

MAINTAIN 12 IN
(18 IN. FOR CANADA)
MINIMUM CLEARANCE
ABOVE HIGHEST
ANTICIPATED SNOW
BAYAIR30AVENTA LEVEL OR GRADE
(Sidewall) WHICHEVER IS GREATER

Shield material to be a minimum of 24 gauge stainless

or aluminized sheet metal. Minimum dimensions are
12"x12". Shield must be fastened to both inside and out-
side of wall. Use screws or anchor type fasteners suited c SUPPORT HORIZONTAL PIPE EVERY 3'
0" WITH THE FIRST SUPPORT AS
to the outside or inside wall surfaces. CLOSE TO THE FURNACE AS POSSIBLE.
INDUCED DRAFT BLOWER, HOUSING,
NONCOMBUSTIBLE MATERIAL WALL AND FURNACE MUST NOT SUPPORT
The hole through the wall must be large enough to THE WEIGHT OF THE FLUE PIPE.
maintain pitch of vent and properly seal.
Use cement mortar seal on inside and outside of wall.
See Figure 32.
VENTING THROUGH THE ROOF
When penetrating roof with a 2" PVC vent pipe, a 2"
electrical conduit flashing may be used for a weather
tight seal. Lubricate flexible seal on flashing before PVC
pipe is pushed through the seal. (Field Supplied)

NOTE:
No vent cap as shown in Figure 36 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.

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 Installer’s Guide
v SEE VENTING TABLE
NOTE: VENT AND INLET MUST BE SUPPORTED
AT A MAXIMUM OF 3' INTERVALS
STRAPS OR OTHER SUITABLE SUPPORTS
USE ONLY
AT MAXIMUM OF 3'-0" INTERVALS APPROVED
TERMINATION

COMBUSTION
AIR INLET
UPWARD PITCH -- 1/4" PER FOOT

FIRST SUPPORT SHOULD BE AS

CLOSE TO FURNACE CONNECTION
AS POSSIBLE. OUTSIDE
WALL

40" UPFLOW OR NOTE: ANY FITTINGS PASSING

DOWNFLOW MODELS THROUGH AN UNHEATED SPACE
MUST BE INSULATED.

TEE

COMBUSTION REDUCING
AIR
STRAP COUPLING,
(FIELD SUPPLIED) FIELD SUPPLIED
RAIN CAP
IF NEEDED
VENT

VENT
2", 2-1/2"
or 3" PIPING
1" + 1/2"

ELBOW
COMBUSTION AIR
(FIELD
SUPPLIED)
3" PIPING

BAYAIR30AVENTA SEAL ALL

BAYVENT200B WALL CAVITIES

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 Installer’s Guide
NOTE:
DOWNWARD VENTING
Furnace may be in vertical or horizontal configuration.
b Both venting methods shown in Figure 40 & 42 must
also have the combustion air inlet installed - meeting
dimension requirements of Figure 36.
DOWNWARD VENT
LENGTH IS LIMITED
TO A MAXIMUM OF 15
EQUIVALENT FEET.

40 Inch n
Upflow or
Downflow
Furnace
Slope 1/4" per ft.

Slope 1/4" per ft.

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 per- m VENT
missible if allowed by local codes. Caution should
be taken to prevent drains from freezing or causing
slippery conditions that could lead to personal in-
jury. Excessive draining of condensate may cause
saturated ground conditions that may result in
damage to plants.
MAINTAIN 12 IN. COMBUSTION
C) The condensate trap should be primed at initial (18 IN. FOR CANADA) AIR
MINIMUM CLEARANCE
start up prior to heating season operation. ABOVE HIGHEST
ANTICIPATED SNOW
LEVEL. MAXIMUM OF
VENTING ROUTED THROUGH A MASONRY CHIMNEY 24 IN. ABOVE ROOF.

VENT FITTING MATERIAL – STAINLESS STEEL

Gas and liquid tight single wall metal vent fitting, de-
signed for resistance to corrosive flue condensate such BAYAIR30AVENTA
as Type 29-4C MUST be used throughout.
These fittings and fitting accessories are to be supplied
,
MAINTAIN 12 IN.
VENT
locally. (18 IN. FOR CANADA)
REMOVE RIBS MINIMUM CLEARANCE
DIRECTION OF STAINLESS STEEL FITTING FROM CAP ABOVE HIGHEST
ANTICIPATED SNOW
All stainless steel fitting must be installed with male LEVEL. MAXIMUM OF
COMBUSTION
end towards the furnace. 24 IN. ABOVE ROOF
AIR
All horizontal stainless steel sections must be posi- ROOF FLASHING BOOT
tioned with the seam on top. (FIELD SUPPLIED)

All long horizontal sections must be supported to pre-

vent sagging. SUPPORT
(FIELD SUPPLIED)
All pipe joints must be fastened and sealed to prevent
escape of combustion products into the building. ELBOW
(FIELD SUPPLIED)

VENT COMBUSTION
AIR

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 Installer’s Guide
. !
SEAL BETWEEN FLANGE, PIPE,
COUPLING AND METAL PANEL
WITH HI TEMP RTV SILICONE SEALANT

FLUE PIPE

COUPLING

SUPPORT
FLANGE

CEILING
GALVANIZED FIRESTOP SHOULD
BE FABRICATED WITH 3-7/8" DIA.
HOLE FOR SUPPORT FLANGE
(12" x 12" PANEL OR 12" DIA MIN.)

CLEARANCE ( 0" ACCEPTABLE FOR PVC VENT PIPE )

( 1" ACCEPTABLE FOR TYPE 29-4C STAINLESS STEEL VENT PIPE )
TYPE 29-4C STAINLESS STEEL VENTING -
/ USED THROUGH CHIMNEY THAT VENTS VENTING THROUGH CEILING
ANOTHER GAS APPLIANCE
STAINLESS STEEL
STAINLESS
PVC PLASTIC VENTING - ONLY
STEEL
VENT CAP
VENT CAP
(OPTIONAL) @ THROUGH UNUSED CHIMNEY
SEE CAUTION 6 IN. MIN. STAINLESS STEEL
STAINLESS
VENT CAP
STEEL
(OPTIONAL)
VENT CAP
SEE CAUTION
6 IN. MIN.
SUPPORT THE SINGLE WAL
FLUE PIPE
STAINLESS STEEL GAS
VENTING AND CENTER IT IN
THE CHIMNEY OPENING WIT
SUPPORT THE SINGLE
ANGLES AS SHOWN OR OUPLING TO SUPPORT WALL FLUE PIPE AND
ANOTHER EQUIVALENT PE FROM ANGLES CENTER IT IN THE
MANNER. R OTHER SUITABLE CHIMNEY OPENING WI
UPPORT METHOD ANGLES AS SHOWN O
ANOTHER EQUIVALEN
MANNER.

COUPLING
AS REQUIRED

FLUE PIPE

NOTE:
HORIZONTAL VENTING
TO VERTICAL VENTING

NOTE:

▲
HORIZONTAL VENTING
! CAUTION TO VERTICAL VENTING

Do NOT run vent through chimney for wood burn-

ing or oil furnaces or incinerators.
If remaining free area between single wall flue pipe
▲
! CAUTION
Do NOT run vent through chimney for wood burning or
and masonry chimney is to be used for another gas
oil furnaces or incinerators or any other gas appliance.
appliance venting area must be sufficient to vent
that appliance and that appliance must be con-
IMPORTANT –
nected to chimney with separate entry openings.
The single wall flue pipe joints must be sealed.
The 90° elbow connection to vertical pipe must be sealed to
IMPORTANT –
prevent condensate leakage to base of masonry chimney.
The single wall flue pipe joints must be sealed.
The 90° elbow connection to vertical pipe must be
sealed to prevent condensate leakage to base of ma-
sonry chimney.

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 Installer’s Guide
IMPORTANT: 4. INSPECTION. The state or local gas inspector of
the side wall horizontally vented gas fueled equipment
The Commonwealth of Massachusetts requires compliance shall not approve the installation unless, upon inspection,
with regulation 248 CMR 4.00 and 5.00 for installation of the inspector observes carbon monoxide detectors and
through – the – wall vented gas appliances as follows: signage installed in accordance with the provisions of 248
CMR 5.08(2)(a)1 through 4.
For all side wall horizontally vented gas fueled equipment This appliance requires a special venting system. If
installed in every dwelling, building or structure used in BAYAIR30AVENTA or BAYVENT200B are used, a copy of
whole or in part for residential purposes, including those the installation instructions for the kit shall remain with
owned or operated by the Commonwealth and where the the appliance or equipment at the completion of
side wall exhaust vent termination is less than seven (7) installation. The venting system installation instructions
feet above finished grade in the area of the venting, can be obtained from the manufacturer by writing to the
including but not limited to decks and porches, the following address:
following requirements shall be satisfied:
1. INSTALLATION OF CARBON MONOXIDE American Standard, Inc.
DETECTORS. At the time of installation of the side wall 6200 Troup Highway
horizontal vented gas fueled equipment, the installing Tyler, TX 75707
plumber or gasfitter shall observe that a hard wired Attention: Manager of Field Operations Excellence
carbon monoxide detector with an alarm and battery back-
up is installed on the floor level where the gas equipment
is to be installed. In addition, the installing plumber or
gasfitter shall observe that a battery operated or hard
wired carbon monoxide detector with an alarm is installed
on each additional level of the dwelling, building or
structure served by the side wall horizontal vented gas
fueled equipment. It shall be the responsibility of the
property owner to secure the services of qualified licensed
professionals for the installation of hard wired carbon
monoxide detectors
a. In the event that the side wall horizontally vented
gas fueled equipment is installed in a crawl space or an
attic, the hard wired carbon monoxide detector with alarm
and battery back-up may be installed on the next adjacent
floor level.
b. In the event that the requirements of this
subdivision can not be met at the time of completion of
installation, the owner shall have a period of thirty (30)
days to comply with the above requirements; provided,
however, that during said thirty (30) day period, a battery
operated carbon monoxide detector with an alarm shall be
installed.
2. APPROVED CARBON MONOXIDE
DETECTORS. Each carbon monoxide detector as required
in accordance with the above provisions shall comply with
NFPA 720 and be ANSI/UL 2034 listed and IAS certified.
3. SIGNAGE. A metal or plastic identification plate
shall be permanently mounted to the exterior of the
building at a minimum height of eight (8) feet above grade
directly in line with the exhaust vent terminal for the
horizontally vented gas fueled heating appliance or
equipment. The sign shall read, in print size no less than
one-half (1/2) inch in size, “GAS VENT DIRECTLY
BELOW. KEEP CLEAR OF ALL OBSTRUCTIONS”.

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 Installer’s Guide
HORIZONTAL INSTALLATION VERTICAL APPLICATIONS
(Upflow/ Horizontal or Downflow/ Horizontal) Upflow furnace - The connection tubing for left and
NOTE: right side drainage is shipped in the blower compart-
In horizontal venting when the factory supplied “off- ment. Install the connection tubing from the trap to the
set” (2X3 reducing coupling) is used for 3” vent pipe side of the unit and trim all excess tubing to avoid
installation, make sure the marking “Top” is located on kinks.
the top side of the pipe. The straight side must be on
bottom for proper condensate drainage. This coupling
is factory supplied only with the following models:
*UC120 & *DC120, *UX120 & *UY120 *UX100 & *UY100,
*UX808C960, and all *DX & *DY models. %
WHEN THE FACTORY SUPPLIED "OFF-SET" (2X3
REDUCING COUPLING) IS USED FOR 3" VENT PIPE

#
INSTALLATION, MAKE SURE THE MARKING "TOP" IS
LOCATED ON THE TOP SIDE OF THE PIPE.

LABEL
SAYS
"TOP"

Right side
STRAIGHT SIDE MUST BE
ON BOTTOM FOR PROPER
CONDENSATE DRAINAGE. UPFLOW (VERTICAL)

2" TO 3" COUPLING

$ ^

FACTORY SUPPLIED ONLY WITH

THE FOLLOWING MODELS:
UC120 & DC120
UX120 & UY120
UX100 & UY100
UX080C960
ALL DX & DY MODLES

Use Inducer Drain

hose without
extension
FURNACE UPFLOW HORIZONTAL 17" UNITS
VENT (Left side only)
OUTLET

Downflow furnace - The furnace is shipped with the

CONDENSATE DRAIN INSTRUCTIONS left side drainage setup. To change the right side drain,
remove the drain lines from the trap, rotate the trap
▲
! CAUTION
180° so it exits to the right, reconnect the lines, and run
IT IS RECOMMENDED THAT A DRAIN PAN BE INSTALLED
a 1/2" CPVC pipe from the trap out through the right
UNDER THE FURNACE TO PREVENT PROPERTY DAMAGE,
side knock-out. Use RTV silicone sealant to connect the
PERSONAL INJURY OR DEATH FROM LEAKING CONDEN-
SATE. CPVC pipe to the trap for ease of removing to clean the
trap.

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 Installer’s Guide
HORIZONTAL APPLICATIONS
Upflow and Downflow furnaces - All horizontal ap-
plications are left side only. It is always recommended (
that the auxiliary drain pan be installed under a hori-
zontally installed evaporator and/or 90% gas furnace.
Connect the auxiliary drain pan to a separate drain line
(no trap is needed in this line).

Left
& side

DOWNFLOW (VERTICAL)

Left side
UPFLOW (VERTICAL)

Right
* side

Use CPVC tubing from Trap outlet,

over burner box to cabinet exit

Use DOWNFLOW (VERTICAL)

extension
hose here

Q
UPFLOW HORIZONTAL 21" & 24" UNITS
(Left side only)

The trap must be repositioned to the exterior of the

cabinet. Remove the trap from its present location and
reposition the trap outside of the unit, through the long
circular hole, next to the secondary recuperated cell.
Remove the larger drain line (from the secondary cell)
and trim to fit between the secondary cell and the new Cut off curved end of
trap location. On upflow units, plug the hole in the Inducer drain hose
blower deck where the tube went through.
Remove the hose from the induced blower and reposi- DOWNFLOW (HORIZONTAL)
tion into the other drain tap of the inducer, which is lo-
cated 90° clockwise around the inducer. Move the cap Connections must be made to an OPEN/ VENTED
from that drain tap to the unused drain tap. On upflow DRAIN. Outdoor draining of the furnace and coil con-
units, plug the hole in the blower deck where the tube densate is permissible if allowed by local codes. Caution
went through. This tube on downflow units will need to should be taken to prevent drains from freezing or caus-
be cut to fit between the inducer and the trap. On ing slippery conditions that could lead to personal in-
upflow units, this tube may need to be extended, using jury. Excessive draining of condensate may cause satu-
the tubing shipped with the furnace. rated ground conditions that may result in damage to
plants.

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 Installer’s Guide
NOTE: Evaporator and furnace condensate drain piping may
Use 1/2" or larger PVC or CPVC pipe and fittings as re- be manifolded together as shown in Figure 52. A pri-
quired for drain connections (fittings, pipe and solvent mary drain vent stack must be installed and termi-
cement not provided).
nated below the outlet of the secondary heat exchanger
drain connection to prevent water from damaging fur-
NOTE:
A corrosion resistant condensate pump must be used nace controls if the primary drain outlet plugs up.
if a pump is required for a specific drain system. Where the furnace is installed above a finished ceiling,
the primary drain vent stack must be installed such
IMPORTANT: that overflow from the vent stack opening will flow into
The condensate drain should be installed with provi- an axillary drain pan in order to prevent water damage
sions to prevent winter freeze-up of the condensate to the finished ceiling below.
drain line. Frozen condensate will block drains, result- TWINNING FURNACES
ing in furnace shutdown. If the drain line cannot be in- These furnaces may be twinned. Twinning requires that
stalled in a conditioned space, then UL listed heat tape two furnaces with the same configuration, capacity, and
should be applied as required to prevent freezing (per
airflow must be used. They shall have common returns
manufacturer’s instructions). The heat tape should be
rated at 5 or 6 watts per foot at 120 volts. Self-regulat- with equal pressure drops or ducts with equivalent
ing (preferred) or thermostatically controlled heat tape lengths and sizes. See Field Wiring Diagrams for proper
is required. hookup.

FIELD WIRING DIAGRAM FOR 1 STAGE FURNACE

W 1 STAGE HEATING
USING A 1 STAGE HEATING THERMOSTAT
NO COOLING
FURNACE
SEE
NOTE 7
TWIN

If upflow furnace is installed

over a finished ceiling, overflow
from the primary drain vent
stack must flow into an auxillary
drain pan to prevent damage to
the finished ceiling below.

SEE
NOTE 6 TO 115 V 1 PH.,
B/C B/C
60 HZ., POWER
Primary drain vent stack
SUPPLY PER
must terminate below
LOCAL CODES
secondary heat exchanger
condensate drain outlet.

HUM SEE
NOTE 5

EAC SEE
NOTE 5
To drain opening

From drawing B341437 Rv 1

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 Installer’s Guide
FIELD WIRING DIAGRAM FOR 1 STAGE FURNACE
1 STAGE HEATING, 1 STAGE COOLING
USING A 1 STAGE HEATING, 1 STAGE COOLING THERMOSTAT
(OUTDOOR SECTION WITHOUT TRANSFORMER)

FURNACE

OUTDOOR UNIT
(NO TRANSFORMER)

SEE
NOTE 6

SEE
NOTE 8
B/C B/C

TO 115 V 1 PH.,
60 HZ., POWER
SUPPLY PER
LOCAL CODES

HUM SEE
NOTE 5

EAC SEE From drawing B340388 Rv 2

NOTE 5

ELECTRICAL CONNECTIONS The integrated furnace control is polarity sensi-

Make wiring connections to the unit as indicated on en- tive. The hot leg of the 120V power supply must be con-
closed wiring diagram. As with all gas appliances using nected to the black power lead as indicated on the wir-
electrical power, this furnace shall be connected into a ing diagram. Provision for hooking up an electronic air
permanently live electric circuit. It is recommended cleaner and or humidifier is provided on the integrated
that furnace be provided with a separate “circuit protec- control.
tion device” in the electric circuit. The furnace must be Refer to the SERVICE FACTS literature and unit wiring
electrically grounded in accordance with local codes or diagram attached to furnace diagram attached to fur-
in the absence of local codes with the National Electri- nace.
cal Code, ANSI/NFPA 70 or CSA C22.1 Electrical Code,
if an external electrical source is utilized.

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 TWINNING CONNECTION DIAGRAM
FOR TWINNING 1 STAGE FURNACES WITH
SINGLE WIRE TWINNING FEATURE
1 STAGE HEAT 1 STAGE HEATING ONLY THERMOSTAT
ONLY
THERMOSTAT
(WITH FAN SWITCH) FURNACE NO. 1 FURNACE NO. 2
BLOWER OPERATION OF
UNIT NO. 2 IS SYNCRONIZED
WITH UNIT NO. 1 VIA SIGNALS
FROM TWIN CONNECTION.

TWIN TWIN

SEE NOTE 4

ISOLATION RELAY
(FIELD SUPPLIED)
SEE NOTE 4

R1 R1

ISOLATION RELAY
SEE NOTE 4

SEE NOTE 3
B/C B/C B/C

From Dwg. 21B341422 Rev. 3

TWINNING CONNECTION DIAGRAM

FOR TWINNING 1 STAGE FURNACES WITH
SINGLE WIRE TWINNING FEATURE
1 STAGE HEAT / 1 STAGE COOL THERMOSTAT
1 STAGE
OUTDOOR UNIT HEATING / COOLING
(WITH TRANSFORMER) THERMOSTAT FURNACE NO. 1 FURNACE NO. 2
BLOWER OPERATION OF
UNIT NO. 2 IS SYNCRONIZED
WITH UNIT NO. 1 VIA SIGNALS
FROM TWIN CONNECTION.

TWIN TWIN
RC

ISOLATION RELAY
(FIELD SUPPLIED)
SEE NOTE 3

SEE NOTE 4

OUTDOOR UNIT
(NO TRANSFORMER)

R1

ISOLATION RELAY
SEE NOTE 4

R1
SEE NOTE 5
B/C B/C B/C
ISOLATION RELAY
(FIELD SUPPLIED)
SEE NOTE 4
From Dwg. 21B341423 Rev. 2

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 Installer’s Guide
GAS PIPING The furnace must be isolated from the gas supply piping
The upflow/ horizontal furnace is shipped standard for by closing its individual manual shut-off valve during
left side installation of gas piping. A knock-out is pro- any pressure testing of the gas supply piping system at
vided on the right side for an alternate gas piping ar- test pressures equal to or less than 1/2 psig (3.5 kPa).
rangement. See Figure 53.
NOTE:
The installation of piping shall be in accordance with Maximum pressure to the gas valve for natural gas is
piping codes and the regulations of the local gas com- 13.8" W.C. Minimum pressure is 5.0" W.C. Maximum
pany. Pipe joint compound must be resistant to the pressure to the gas valve for propane is 13.8" W.C.
chemical reaction with liquefied petroleum gases. Minimum pressure is 11.0" W.C.
Refer to piping Table 13, for delivery sizes. Connect gas All gas fittings must be checked for leaks using a
supply to the unit, using a ground joint union and a soapy solution before lighting the furnace. DO NOT
manual shut-off valve as shown in Figures 53-55. CHECK WITH AN OPEN FLAME!
National codes require a condensation drip leg to be in-
stalled ahead of the controls as shown in Figures 53-55.
The furnace and its individual shut-off valve must be
▲
! CAUTION
Use a backup wrench on the gas valve when installing
disconnected from the gas supply piping system during
gas piping to prevent damage to the gas valve and
any pressure testing of that system at test pressures in manifold assembly.
excess of 1/2 psig (3.5 kPa).

E AUTOMATIC GAS VALVE AUTOMATIC GAS VALVE

WITH MANUAL SHUTOFF WITH MANUAL SHUTOFF
MAIN MANUAL
SHUTOFF VALVE

MAIN MANUAL
SHUTOFF VALVE
GROUND
UNION
JOINT
GROUND
UNION
JOINT
DRIP
LEG

DRIP
LEG

UPFLOW – LEFT HAND GAS PIPING UPFLOW – RIGHT HAND GAS PIPING

THE DOWNFLOW (VERTICAL) MAY BE INSTALLED LEFT OR RIGHT SIDE GAS PIPING

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 Installer’s Guide
T AUTOMATIC GAS VALVE
MAIN MANUAL
SHUTOFF VALVE GROUND UNION JOINT
WITH MANUAL SHUTOFF
DRIP
LEG

MAIN MANUAL
SHUTOFF VALVE

GROUND DRIP
UNION JOINT LEG AUTOMATIC GAS VALVE
WITH MANUAL SHUTOFF

HORIZONTAL FURNACE GAS PIPING MAY BE FROM EITHER SIDE (UPFLOW SHOWN)
TABLE 13
6. Multiply the final figure by the heating value of the
NATURAL GAS ONLY
gas obtained from the utility company and compare
TABLE OF CUBIC FEET PER HOUR OF GAS
FOR VARIOUS PIPE SIZES AND LENGTHS to the nameplate rating. This must not exceed the
LENGTH OF PIPE nameplate rating.
PIPE
SIZE 10 20 30 40 50 60 70
7. Changes can be made by adjusting the manifold
pressure or changing orifices (orifice change may
1/2 132 92 73 63 56 50 46
not always be required). To adjust the manifold
3/4 278 190 152 130 115 105 96
pressure:
1 520 350 285 245 215 195 180
a. Turn off all electrical power to the system.
1-1/4 1050 730 590 520 440 400 370 b.Attach a manifold pressure gauge to the outlet
This table is based on pressure drop of 0.3 inch W.C. and 0.6 SP.GR. gas pressure tap marked "OUT PRESS TAP" on
White-Rodgers gas valve model 36F or boss
TABLE 14
ORIFICE SIZES marked "OUT P" on White-Rodgers gas valve
model 36G. (See Figure 58 for White-Rodgers gas
INPUT NUMBER MAIN BURNER ORIFICE
DRILL SIZE valve model 36F and Figure 59 for White-Rodgers
RATING OF
BTUH BURNERS NAT. GAS LP GAS
gas valve model 36G). For the gas valve model
36F, measurement requires removal of the plug
40,000 2 45 56
60,000 3 45 56
and installation of a barbed fitting. Attach flexible
80,000 4 45 56 tubing and a manometer to the barbed fitting.
100,000 5 45 56 For the gas valve model 36G, do not remove the
120,000 6 45 56 pressure tap test screw. Using a 3/32" hex
COMBUSTION AND INPUT CHECK wrench, loosen the pressure tap test screw one
1. Make sure all gas appliances are off except the fur- turn and install 5/16" flexible tubing and a ma-
nace. nometer directly onto the outlet pressure boss.
2. Clock the gas meter with the furnace operating (de- c. Turn on system power and energize valve.
termine the dial rating of the meter) for one revolu- d.Remove the regulator adjustment screw cap on
tion. the gas valve for manifold pressure adjustment.
3. Match the “Sec” column in the gas flow (in cfh) e.Turn the adjustment nut clockwise to increase
Table 16 with the time clocked. the gas flow rate, and counterclockwise to de-
4. Read the “Flow” column opposite the number of sec- crease the gas flow rate using a 3/32" hex wench.
onds clocked. f. The final manifold pressure setting shall be as
5. Use the following factors if necessary: specified in Table 15 with an input of no more
For 1 Cu. Ft. Dial Gas Flow CFH = than nameplate rating and no less than 93% of
Chart Flow Reading ÷2 the nameplate rating, unless the unit is derated
For 1/2 Cu Ft. Dial Gas Flow CFH = for high altitude.
Chart Flow Reading ÷4 g. Replace the regulator adjustment screw cap and
For 5 Cu. Ft. Dial Gas Flow CFH = tighten securely.
10X Chart Flow Reading ÷4
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 Installer’s Guide
h. Turn off all electrical power to the system.
i. Remove the manometer and flexible tubing. Re- Table 14 lists the main burner orifices used with the
move the barbed fitting and replace the plug or furnace. If a change of orifices is required to correct the
tighten the pressure test screw. furnace input rating. Refer to Table 17.
j. Turn on electrical power to the system and ener- TABLE 15
gize valve.
k. Using a leak detection solution or soap suds, FINAL MANIFOLD PRESSURE SETTINGS
check for leaks at plug or pressure boss screw. FUEL PRESSURE

▲
NATURAL GAS 3.5" W.C.
! WARNING
Replace and/ or tighten all plugs removed or loosened LP GAS 11.0" W.C.
when adjusting gas pressure. Leak check the fittings
before placing the furnace into regular service.
Failure to follow this warning could result in fire, ex-
plosion, or property damage.

NOTE:
The manifold pressure must be referenced to the
burner box. The burner box pressure tap equalizes the
gas valve pressure regulator. Manifold pressure is
checked by installing a tee (field supplied) in the tub-
ing, between the tee coming from the burner box tube
and the gas valve, in addition to the regular gas valve
pressure tap on the outlet side of the gas valve. See
Figure 53.
▲
! CAUTION
Replace manifold pressure tap threaded plug and leak
check after checking/ adjusting manifold gas pressure.

18-CD19D6-32 33

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 Installer’s Guide
HIGH ALTITUDE DERATE
Input ratings (BTUH) of these furnaces are based on U ROTATE THE FRONT
COVER AS SHOWN
sea level operation and should not be changed at eleva-
tions up to 2,000 ft. INSERT THE TOP
If the installation is 2,000 ft. or above, the furnace input FLANGE OF THE FRONT
rate (BTUH) shall be reduced 4% for each 1,000 ft. COVER UNDER THE LIP
INSIDE THE BOX
above sea level. The furnace input rate shall be checked
by clocking the gas flow rate (CFH) and multiplying by
ALL SIDE FLANGES
the heating value obtained from the local utility sup- MUST BE OUTSIDE OF
plier for the gas being delivered at the installed altitude. THE BOX
Input rate changes can be made by adjusting the mani-
fold pressure (min 3.0 - max 3.7 in. W.C. - Natural Gas) ROTATE THE FRONT
or changing orifices (orifice change may not always be COVER INWARD
MAKING SURE THAT
required). If the desired input rate can not be achieved ALL SIDE FLANGES
with a change in manifold pressure, then the orifices ARE OUTSIDE OF THE
must be changed. LP installations will require an orifice BOX.
change.
Installation of this furnace at altitudes above 2,000 ft.
(610m) shall be in accordance with the local codes, or in
the absence of local codes, the National Fuel Gas Code,
ANSI Z223.1/ NFPA 54 or National Standard of
Canada, Natural Gas and Propane Installation Code,
CSA 149.1. Installation of this furnace at altitudes
above 2,000 ft. (610m) shall be made in accordance with TABLE 16
the listed high Altitude Conversion Kit available with
GAS FLOW IN CUBIC FEET PER HOUR
this furnace.
2 CUBIC FOOT DIAL
IMPORTANT: SEC. FLOW SEC. FLOW SEC. FLOW SEC. FLOW
Re-install the propane orifices to the same depth as the 8 900 29 248 50 144 82 88
orifices supplied with the equipment. 9 800 30 240 51 141 84 86
10 720 31 232 52 138 86 84
11 655 32 225 53 136 88 82
12 600 33 218 54 133 90 80
13 555 34 212 55 131 92 78
14 514 35 206 56 129 94 76
15 480 36 200 57 126 96 75
16 450 37 195 58 124 98 73
17 424 38 189 59 122 100 72
18 400 39 185 60 120 104 69
19 379 40 180 62 116 108 67
20 360 41 176 64 112 112 64
21 343 42 172 66 109 116 62
22 327 43 167 68 106 120 60
23 313 44 164 70 103 124 58
24 300 45 160 72 100 128 56
25 288 46 157 74 97 132 54
26 277 47 153 76 95 136 53
27 267 48 150 78 92 140 51
28 257 49 147 80 90 144 50

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 Installer’s Guide
See Table 17 & 18 for help in selecting orifices if orifice DO NOT CHECK WITH AN OPEN FLAME. Allow 5
change is required. Furnace input rate and tempera- minutes for any gas that might have escaped to dissi-
ture rise should be checked again after changing ori- pate. LP Gas being heavier than air may require forced
fices to confirm the proper rate for the altitude. ventilation. Flip the switch on the gas valve in the unit
Installations above 4,000 feet may require a pressure to the “ON” position.
switch change. If required, use the BAYHALT*** Kit
(High Altitude Accessory Kit) listed in PRODUCT DATA.
I Outlet Pressure Boss Regulator
TABLE 17 Adjustment

PART NUMBERS FOR REPLACEMENT ORIFICES

DRILL PART DRILL PART
SIZE NUMBER SIZE NUMBER
44 ORF00501 54 ORF00555
45 ORF00644 55 ORF00693
46 ORF00909 56 ORF00907
47 ORF00910 57 ORF00908
48 ORF01099 58 ORF01338
49 ORF00503 59 ORF01339
50 ORF00493
Inlet Pressure
REINSTALLATION OF THE BURNER BOX COVER Boss (opt.)
On/Off Switch
Figure 57 shows the correct way to reinstall the burner
box cover if adjustment or replacement of the flame White-Rodgers 36G gas valve
sensor, hot surface igniter, or main burner orifices have
required removal of the cover.
TABLE 18 O On/Off
ff Swi
Switch
ch
Orifice
Twist Drill ALTITUDE ABOVE SEA LEVEL
Size If
Installed and Orifice Required At Other Elevations
At Sea
Level 2000 3000 4000 5000 6000 7000 8000 9000 10000
42 42 43 43 43 44 44 45 46 47
43 44 44 44 45 45 46 47 47 48
44 45 45 45 46 47 47 48 48 50
45 46 47 47 47 48 48 49 49 50
46 47 47 47 48 48 49 49 50 51
47 48 48 49 49 49 50 50 51 52
54 54 55 55 55 55 55 56 56 56
55 55 55 55 56 56 56 56 56 57
56 56 56 57 57 57 58 59 59 60
57 58 59 59 60 60 61 62 63 63 White-Rodgers 36F gas valve
58 59 60 60 61 62 62 63 63 64
From National Fuel Gas Code - Table F-4
LIGHTING INSTRUCTIONS
▲
! WARNING
CARBON MONOXIDE POISONING HAZARD ▲
! WARNING
Failure to follow the installation instructions for the DO NOT attempt to manually light the burner.
venting system being placed into operation could re- Failure to follow this warning could result in property
sult in carbon monoxide poisoning or death. damage, personal injury or death.
Lighting instructions appear on each unit. Each instal-
START UP AND ADJUSTMENT
lation must be checked out at the time of initial start up
PRELIMINARY INSPECTIONS
to insure proper operation of all components. Check out
With gas and electrical power “OFF”
should include putting the unit through one complete
1. Duct connections are properly sealed
cycle as outlined below.
2. Filters are in place
Turn on the main electrical supply and set the thermo-
3. Venting is properly assembled
stat above the indicated temperature. The ignitor will
4. Blower door is in place
automatically heat, then the gas valve is energized to
Flip the switch on main gas valve within the unit to the
permit the flow of gas to the burners. After ignition and
“OFF” position. Turn the external gas valve to “ON”.
flame is established, the flame control module monitors
Purge the air from the gas lines. After purging, Check
the flame and supplies power to the gas valve until the
all gas connections for leaks with a soapy solution —
thermostat is satisfied.

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 Installer’s Guide
To shut off. furnace reaches the maximum outlet temperature as
For complete shut-down: Flip the switch on the main shown on the rating plate, the burners must shut off. If
gas valve to the “OFF” position, (See Figure 58 & 59). they do not shut off after a reasonable time and over-
Disconnect the electrical supply to the unit. heating is evident, a faulty limit switch is probable and
the limit switch must be replaced. After checking the
▲
! CAUTION operation of the limit control, be sure to remove the pa-
If this is done during the cold weather months, provi- per or cardboard from the return air inlet. Refer to Ser-
sions must be taken to prevent freeze-up of all water vice Facts for additional instructions.
pipes and water receptacles.
NOTE TO INSTALLER
Failure to follow this warning could result in property
damage. Review the following warnings with the owner. Review
contents of USER’S INFORMATION MANUAL with the
Whenever your house is to be vacant, arrange to owner.
have someone inspect your house for proper tem- AIRFLOW ADJUSTMENT
perature. This is very important during freezing Check inlet and outlet air temperatures to make sure
weather. If for any reason your furnace should they are within the ranges specified on the furnace rat-
fail to operate damage could result, such as fro- ing nameplate. If the airflow needs to be increased or
zen water pipes. decreased, see the wiring diagram for information on
SEQUENCE OF OPERATION changing the speed of the blower motor.
Thermostat call for heat
R and W thermostat contacts close signaling the control
▲
! WARNING
module to run its self-check routine. After the control Disconnect power to the unit before removing the
blower door.
module has verified that the pressure switch contacts
Failure to follow this warning could result in property
are open and the limit switch(es) contacts are closed, damage, personal injury or death.
the draft blower will be energized.
As the induced draft blower comes up to speed, the This unit is equipped with a blower door switch which
pressure switch contacts will close and the ignitor warm cuts power to the blower and gas valve causing shut-
up period will begin. The ignitor will heat for approxi- down when the door is removed. Operation with the
mately 20 seconds, then the gas valve is energized to door removed or ajar can permit the escape of danger-
permit gas flow to the burners. The flame sensor con- ous fumes. All panels must be securely closed at all
firms that ignition has been achieved. times for safe operation of the furnace.
After the flame sensor confirms within a 4 second trial INDOOR BLOWER TIMING
period that ignition has been achieved, the delay to fan Heating: The integrated furnace control module con-
ON period begins timing. After approximately 45 sec- trols the indoor blower. The blower start is fixed at 45
onds the indoor blower motor will be energized and con- seconds after ignition. The FAN-OFF period is field se-
tinue to run during the heating cycle. lectable by dip switches at 60, 100, 140, or 180 seconds.
When the thermostat is satisfied, R and W thermostat The factory setting is 100 seconds (See wiring diagram).
contacts open, the gas valve will close, the flames will Cooling: The fan delay off period is factory set at 0 sec-
extinguish, and the induced draft blower will be de-en- onds. The option for 80 second delay off is field select-
ergized. The indoor blower motor will continue to run able (See wiring diagram).
for the fan off period (Field selectable at 60, 100, 140 or ROOM AIR THERMOSTAT
180 seconds), then be de-energized by the control mod- HEAT ANTICIPATOR ADJUSTMENT
ule. Set the thermostat heat anticipator according to the
current flow measured, or the settings found in the
CONTROL AND SAFETY SWITCH ADJUSTMENTS notes on the furnace wiring diagram (found in the SER-
LIMIT SWITCH CHECK OUT VICE FACTS or inside the furnace casing).
The limit switch is a safety device designed to close the INSTRUCTIONS TO THE OWNERS
gas valve should the furnace become overheated. Since In the event that electrical, fuel, or mechanical
proper operation of this switch is important to the failures occur, the owner should immediately
safety of the unit, it must be checked out on initial turn the gas supply off at the manual gas valve,
start up by the installer. located in the burner compartment. Also turn off
To check for proper operation of the limit switches, set electrical power to the furnace and contact the
the thermostat to a temperature higher than the indi- service agency designated by your dealer.
cated temperature to bring on the gas valve. Restrict
the airflow by blocking the return air (disconnecting the
indoor blower may trip the inducer limit). When the

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 Installer’s Guide
BURNER BOX TEMPERATURE LIMIT DEVICE 8. RESET AFTER BURNER BOX LIMIT SHUT-
All models are equipped with a manual reset tempera- DOWN
ture limit located on the burner box. In case of exces- If the furnace shuts down, one thing that can be
sive temperature, the limit will open and cause the cir- checked is the burner box temperature limit switch.
cuit to open which shuts off all flow of gas. It is located on the bottom of the burner box. The
ABNORMAL CONDITIONS vent and combustion air inlet terminations should
1. EXCESSIVE COMBUSTION PRESSURE (WIND IN be checked for blockage. If blockage exists, clear
EXCESS OF 40 M.P.H.) VENT OR FLUE BLOCK- the problem and then the reset button may be de-
AGE pressed. If there is no blockage of the termina-
If pressure against induced draft blower outlet be- tions, the limit switch must be reset by a
comes excessive, the pressure switch will open and qualified servicer.
shut off the gas valve until acceptable combustion Carbon monoxide, fire or smoke can cause serious
pressure is again available. bodily injury, death, and/or property damage.
2. LOSS OF FLAME A variety of potential sources of carbon monoxide can be
If loss of flame occurs during a heating cycle, or found in a building or dwelling such as gas-fired clothes
flame is not present at the sensor, the flame control dryers, gas cooking stoves, water heaters, furnaces and
module will close the gas valve. The flame control fireplaces. The U.S. Consumer Product Safety Commis-
module will then recycle the ignition sequence, sion recommends that users of gas-burning appliances
then if ignition is not achieved, it will shut off the install carbon monoxide detectors as well as fire and
gas valve and lock out the system. smoke detectors per the manufacturers installation in-
3. POWER FAILURE structions to help alert dwelling occupants of the pres-
If there is a power failure during a heating cycle, ence of fire, smoke or unsafe levels of carbon monoxide.
the system will restart the ignition sequence auto- These devises should be listed by Underwriters Labo-
matically when power is restored if the thermostat ratories, Inc. Standards for Single and Multiple Station
still calls for heat. Carbon Monoxide Alarms, UL 2034 or CSA Interna-
4. GAS SUPPLY FAILURE tional Standard, Residential Carbon Monoxide Alarming
If loss of flame occurs during a heating cycle, the Devices, CSA 6.19
system integrated control module will recycle the
NOTE:
ignition sequence, then if ignition is not achieved,
The manufacturer of your furnace does not test any de-
the integrated control module will shut off the gas tectors and makes no representations regarding any
valve and lock out the system. brand or type of detector.
5. INDUCED DRAFT BLOWER FAILURE
If pressure is not sensed by the pressure switch, the
contacts will remain open and not allow the gas
valve to open, therefore the unit will not start. If
failure occurs during a running cycle, the pressure
switch contacts will open and the gas valve will
close to shut the unit down.
6. CONDENSATE DRAIN BLOCKAGE
If the condensate drain is blocked, either by debris,
improper draining, or by freezing condensate, the
pressure switch will sense the accumulation of con-
densate in the furnace drain pan. The pressure
switch contacts will open and remain open, not al-
lowing unit operation. The unit will not operate un-
til the condensate drain has been cleared, and the
condensate flows freely.
7. RESET AFTER LOCKOUT
When the integrated control module has shut the
system down and gone into lockout, the system
must be manually reset before the unit will restart.
To reset, turn the system power off, then on, then
off and then on again within 30 seconds. This may
be done at the unit’s power source or at the ther-
mostat. The system will not reset unless the proce-
dure off-on-off-on is completed within 30 seconds.
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 Installer’s Guide

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 Installer’s Guide
INTEGRATED FURNACE CONTROL ERROR FLASH CODES
Flashing Slow --- Normal - No call for Heat
Flashing Fast --- Normal - Call for Heat
Continuous ON --- Replace IFC
Continuous OFF --- Check Power
2 Flashes --- System Lockout (Retries or Recycles exceeded)
Draft Pressure Error - Possible problems:
a) Venting problem
3 Flashes ---
b) Pressure switch problem
c) Inducer problem
4 Flashes --- Open Temperature Limit Circuit
5 Flashes --- Flame sensed when no flame should be present
6 Flashes --- 115 volt AC power reversed, poor grounding or system voltage too low
7 Flashes --- Gas valve circuit error
8 Flashes --- Low flame sense signal
Check Ignitor Circuit and Line "N" to 24VAC "Common" voltage (≤ 2 volts)
9 Flashes ---
[possible grounding problem]

18-CD19D6-32 39

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 Literature Order Number 18-CD19D6-32

Trane File Number 18-CD19D6-32

6200 Troup Highway Supersedes 18-CD19D6-31
Tyler, TX 75707
Date 05/08

For more information contact Since the manufacturer has a policy of continuous product and product data improvement, it reserves the
your local dealer (distributor) right to change design and specifications without notice.

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