The following safety practices and precautions must be
followed during the installation, servicing, and operation
of this furnace.
1. Use only with the type of gas approved for this
furnace. Refer to the furnace rating plate.
2. Install this furnace only in a location and position as
specified in “Location and Clearances” (page 4), of
these instructions.
3. Provide adequate combustion and ventilation air to
the furnace space as specified in “Air for Combustion
and Ventilation” (pages 8-9), of these instructions.
4. Combustion products must be discharged outdoors.
Connect this furnace to an approved vent system
only, as specified in the “Venting” section (pages 13-
22), of these instructions.
5. Never test for gas leaks with an open flame. Use
a commercially available soap solution made
specifically for the detection of leaks to check all
connections, as specified in “Gas Piping” (pages 29-
30), of these instructions.
6. Always install the furnace to operate within the
furnace’s intended temperature-rise range with a duct
system which has an external static pressure within
the allowable range, as specified on the unit rating
plate. Airflow with temperature rise for cfm versus
static is shown in the Service Facts accompanying
this furnace.
7. When a furnace is installed so that supply ducts carry
air circulated by the furnace to areas outside the
space containing the furnace, the return air shall also
be handled by a duct(s) sealed to the furnace casing
and terminating outside the space containing the
furnace.
8. A gas-fired furnace for installation in a residential
garage must be installed as specified in “Location
and Clearances” section (page 4), of these
instructions.
9. The furnace may be used for temporary heating of
buildings or structures under construction only when
the following conditions have been met:
a. The furnace venting system must be complete
and installed per manufacturers instructions.
b. The furnace is controlled only by a room
thermostat (no field jumpers).
c. The furnace return air duct must be complete and
sealed to the furnace and clean air filters are in
place.
d. The furnace input rate and temperature rise must
be verified to be within nameplate marking.
e. 100% of the furnace combustion air requirement
must come from outside the structure.
f. The furnace return air temperature range is
between 55 and 80 degrees Fahrenheit.
g. Clean the furnace, duct work, and components
upon substantial completion of the construction
process, and verify furnace operating conditions
including ignition, input rate, temperature rise
and venting, according to the manufacturer's
instructions.
10. This product must be gas piped by a Licensed
Plumber or Gas Fitter in the Commonwealth of
Massachusetts.
CARBON MONOXIDE POISONING HAZARD
Failure to follow the steps outlined below for each appliance connected to the venting system being placed
into operation could result in carbon monoxide poisoning or death.
The following steps shall be followed for each appliance connected to the venting system being placed
into operation, while all other appliances connected to
the venting system are not in operation:
1. Seal any unused openings in the venting system.
2. Inspect the venting system for proper size and horizontal pitch, as required in the National Fuel Gas
Code, ANSI Z223.1/NFPA 54 or the CAN/CGA B149
Installation Codes and these instructions. Determine that there is no blockage or restriction, leakage, corrosion and other deficiencies which could
cause an unsafe condition.
3. As far as practical, close all building doors and
windows and all doors between the space in which
the appliance(s) connected to the venting system
are located and other deficiencies which could
cause an unsafe condition.
4. Close fireplace dampers.
5. Turn on clothes dryers and any appliance not connected to the venting system. Turn on any exhaust fans, such as range hoods and bathroom exhausts, so they are operating at maximum speed.
Do not operate a summer exhaust fan.
6. Follow the lighting instructions. Place the appliance being inspected into operation. Adjust the
thermostat so appliance is operating continuously.
7. If improper venting is observed during any of the
above tests, the venting system must be corrected
in accordance with the National Fuel Gas Code,
ANSI Z221.1/NFPA 54 and/or CAN/CGA B149.1 Installation Codes.
8. After it has been determined that each appliance
connected to the venting system properly vents
where tested as outlined above, return doors, windows, exhaust fans, fireplace dampers and any
other gas-fired burning appliance to their previous
conditions of use.
Safety signal words are used to designate a degree or
level of seriousness associated with a particular hazard.
The signal words for safety markings are WARNING and
CAUTION.
a. WARNING indicates a potentially hazardous situation
which, if not avoided, could result in death or serious
injury.
b. CAUTION indicates a potentially hazardous situation
which, if not avoided, may result in minor or moderate
injury. It is also used to alert against unsafe practices
and hazards involving only property damage.
FIRE OR EXPLOSION HAZARD
Failure to follow the safety warnings exactly could result in serious injury, death or property damage.
Improper servicing could result in dangerous operation, serious injury, death, or property damage.
GENERAL INSTALLATION INSTRUCTIONS
The manufacturer assumes no responsibility for equipment installed in violation of any code or regulation.
It is recommended that Manual J of the Air Conditioning
Contractors Association (ACCA) or A.R.I. 230 be followed
in estimating heating requirements. When estimating
heating requirements for installation at altitudes above
2000 ft., remember the gas input may need to be reduced
(See High Altitude Installation).
Material in this shipment has been inspected at the
factory and released to the transportation agency
without known damage. Inspect exterior of carton
for evidence of rough handling in shipment. Unpack
carefully after moving equipment to approximate location. If damage to contents is found, report the
damage immediately to the delivering agency.
Codes and local utility requirements governing the installation of gas fired equipment, wiring, plumbing, and flue
connections must be adhered to. In the absence of local
codes, the installation must conform with latest edition of
the National Fuel Gas Code ANSI Z223.1 • National Installation Code, CAN/CGA B149.1. The latest code may
be obtained from the American Gas Association Laboratories, 400 N. Capitol St. NW, Washington D.C. 20001.
1-800-699-9277 or www.aga.org
These furnaces have been classified as CATEGORY IV
furnaces in accordance with latest edition of ANSI Z21.47
• CAN/ CGA 2.3 standards.
Contents
INSTALLATION INSTRUCTIONS
General Installation Instructions 3
Location and Clearances 4
Outline Drawings 5
Upflow Installation 7
Downflow Installation 7
Horizontal Installation 7
Air For Combustion and Ventilation 8
Duct Connections 10
Return Air Filters 11
General Venting Instructions 14
Venting Material 15
Venting Tables 15
Horizontal Venting 16
Venting Through The Wall 20
Venting Through The Roof 20
Downward Venting 22
Venting Through a Masonry Chimney 22
Condensate Drain Instructions 25
Electrical Connections 27
Field Wiring Diagrams 27
Gas Piping 29
Combustion Input Checks 31
Start Up and Adjustment 33
Preliminary Inspections 33
Lighting Instructions 34
Sequence Of Operation 34
Control And Safety Switch Adjustments 34
Airflow Adjustment 35
Conditions Affecting Operation 35
IFC Error Flash Code 37
Category IV furnaces operate with positive vent static
pressure and with a flue loss less than 17 percent. These
conditions require special venting systems, which must
be gas tight and water tight. These Category IV Direct
Vent furnaces are approved for installation in Manufactured/Mobile housing when used with BAYMFGH100A.
18-CD33D1-4 3
Page 4
Installer’s Guide
▲
CAUTION
!
▲
CAUTION
!
▲
WARNING
!
To prevent shortening its service life, the furnace
should not be used as a “Construction Heater” during
the finishing phases of construction until the requirements listed in item 9, a-g of the safety section of this
publication have been met. Condensate in the presence of chlorides and fluorides from paint, varnish,
stains, adhesives, cleaning compounds, and cement
create a corrosive condition which may cause rapid
deterioration of the heat exchanger.
Do NOT install the furnace in a corrosive or contaminated atmosphere.
EXPLOSION HAZARD!
PROPANE GAS IS HEAVIER THAN AIR AND MAY
COLLECT IN ANY LOW AREAS OR CONFINED SPACES. IN ADDITION, ODORANT FADE MAY MAKE THE
GAS UNDETECTABLE EXCEPT WITH A WARNING
DEVICE. IF THE GAS FURNACE IS INSTALLED IN A
BASEMENT, AN EXCAVATED AREA OR A CONFINED
SPACE, IT IS STRONGLY RECOMMENDED TO CONTACT A GAS SUPPLIER TO INSTALL A GAS DETECTING WARNING DEVICE IN CASE OF A GAS LEAK.
NOTE: The manufacturer of your furnace does NOT test
any detectors and makes no representations regarding
any brand or type of detector.
LOCATION AND CLEARANCES
The location of the furnace is normally selected by the architect, the builder, or the installer. However, before the
furnace is moved into place, be sure to consider the following requirements:
1. Is the location selected as near the vent and as centralized for heat distribution as practical?
2. Do all clearances between the furnace and enclosure
equal or exceed the minimums shown in the Table 1.
3. Is there sufficient space for servicing the furnace and
other equipment? A minimum of 24 inches front accessibility to the furnace must be provided. Any access door or panel must permit removal of the largest
component.
4. Are there at least 3 inches of clearance between the
furnace front panel and any closed panel or door
provided?
5. Are the ventilation and combustion air openings large
enough and will they remain unobstructed? If outside air is used, are the openings set 12" minimum
above the highest snow accumulation level (18" in
Canadian applications)?
6. Allow sufficient height in supply plenum above or below the furnace to provide for cooling coil installation
if the cooling coil is not installed at the time of this
furnace installation.
7. A furnace shall be installed so electrical components
are protected from water.
8. If the furnace is installed in a residential garage, it
must be installed so that the burners and the ignition
source are located not less than 18 inches above the
floor and the furnace must be located or protected to
avoid physical damage from vehicles.
IMPORTANT:
The furnace must be installed level. The only allowable
variation would be slightly to the left and/or forward in
upflow installations or slightly toward the front in horizontal
installations. This is necessary for proper condensate
drainage.
4 18-CD33D1-4
Page 5
Installer’s Guide
From Dwg. 21C341884
APPLICATION.
REFER TO THE VENT LENGTH TABLE FOR PROPER
OR 3” ON SOME MODELS AT DIFFERENT ALTITUDES.
NOTES:
1. *UH1C100A9H41, & *UH1D120A9H51
REQUIRE 3” DIAMETER VENT PIPE.
2. DIAMETER OF VENT PIPE MAY BE LIMITED TO 2-1/2”
(ALL DIMENSIONS ARE IN INCHES)
*UH1-H OUTLINE DRAWING
18-CD33D1-4 5
Page 6
Installer’s Guide
From Dwg. 21C341885
(ALL DIMENSIONS ARE IN INCHES)
*DH1-H DOWNFLOW/ HORIZONTAL OUTLINE DRAWING
6 18-CD33D1-4
Page 7
UPFLOW INSTALLATION
▲
WARNING
!
UPFLOW
FURNACE
CASED
COIL
SCREWS
(BOTH SIDES)
STANDOFFS
(BOTH SIDES)
STANDOFFS (4)
DRILL SCREWS (4)
Standoffs and screws (See Figure 1) are included with
the cased coils for attachment to the furnace. There are
clearance alignment holes near the bottom of the coil
wrapper. Drill screws are used to engage the furnace top
flanges. The standoff is inserted into the cabinet alignment hole. The drill screws are inserted through the
standoffs then screwed into the furnace flange.
The coil is always placed downstream of the furnace airflow.
1
FOR VERTICAL
INSTALLATIONS:
DOWNFLOW INSTALLATIONS
FIRE HAZARD
Do NOT install the furnace directly on carpeting, tile
or other combustible material other than wood flooring. For vertical downflow application, subbase (BAYBASE205) must be used between the furnace and
combustible flooring. When the downflow furnace is
installed vertically with a cased coil, a subbase is not
required.
Required floor opening:
Installer’s Guide
2
FURNACE
FRONT
HORIZONTAL INSTALLATION
The coil and furnace must be fully supported when used
in the horizontal position. It is always recommended that
an auxiliary drain pan be installed under a horizontally
installed evaporator coil or 90% gas furnace. Connect
the auxiliary drain line to a separate drain line (no trap is
needed in this line).
Three brackets (with screws) are included with downflow
furnaces for installation to stabilize and secure the furnace and TXC cased coil in the horizontal position. See
Figure 3.
IMPORTANT:
The 2/4TXC cased coil must be placed downstream of the
furnace. In horizontal installations, the apex of the coil
may point either toward or away from the furnace. See the
2/4TXC coil Installer's Guide for more details.
The cased coil is secured to the furnace and both the furnace and the cased coil must be properly supported. The
brackets mount using the rear screws on the coil case
and use the screws provided to secure the bracket to the
furnace. The remaining bracket is placed as close to center as possible (horizontally) between the coil case front
and the furnace bottom channel (for downflow/horizontal furnace). Use four of the screws provided to secure
the bracket. The upflow furnace, converted to horizontal,
aligns and attaches the TXC coil as in Figure 1. However,
the coil requires additional support.
3
CASED COIL CONNECTION
BRACKET FOR DOWNFLOW FUR-
NACE IN HORIZONTAL
A (width)
B (depth)
D
C
CABINET
WIDTH
17-1/2"16-1/4"16-5/8"20-1/8"15-5/8"19-3/8"
21"19-3/4"20-1/8"20-1/8"19-1/8"19-3/8"
24-1/2"23-1/4"23-5/8"20-1/8"22-5/8"19-3/8"
18-CD33D1-4 7
SUBBASE CROSS SECTION
TABLE 1
RETURN
DUCT WIDTH
FLOOR OPENING PLENUM OPENING
"A" "B""C""D"
DOWNFLOW ONLY
The furnace may be installed in an attic or crawl space
in the horizontal position by placing the furnace on the left side (as viewed from the front in the vertical position).
The horizontal furnace installation in an attic should be
on a service platform large enough to allow for proper
clearances on all sides and service access to the front of
the furnace (See Figure 4 & Clearance Table). Line contact is only permissible between lines formed by intersections of the top and two sides of the furnace casing and
building joists, studs, or framing.
Page 8
Installer’s Guide
The furnace may be placed horizontally in a crawl space
on a pad or other noncombustible material which will
raise the unit for sufficient protection from moisture. The
furnace must be supported at both ends and the middle when installed horizontally.
4
UPFLOW/
HORIZONTAL
SHOWN
The furnace must also be elevated a minimum of 6
inches to allow clearance for the condensate drain to
exit the cabinet in the horizontal position.
The horizontal furnace may also be suspended from
the joists using 3/8" all-thread rods with pieces of angle
iron underneath the furnace to form a hanging rack at
both ends and the midpoint. The rods need to be of sufficient length to allow for proper clearances from combustible materials. The angle iron needs to be at least 32" in
length to allow for access to service panels.
5
50 CU. FT. OR MORE
PER 1000 BTU/HR. INPUT
ALL EQUIP. INSTALLED
made in accordance with latest edition of Section 5.3, Air
for Combustion and Ventilation, of the National Fuel Gas
Code, ANSI Z223.1 — CAN/CGA B149.1 or applicable
provisions of the local building codes. Special conditions
created by mechanical exhausting of air and fireplaces
must be con sidered to avoid unsatisfactory furnace operation.
OUTSIDE AIR IS RECOMMENDED
The use of indoor air for most applications is acceptable,
unless there is the presence of corrosive chemicals
or contamination. Certain types of installation will require the use of outside air for combustion.
The following types of installations will require use of
OUTDOOR AIR for combustion, due to chemical exposures:
* Commercial buildings
* Buildings with indoor pools
* Furnaces installed in “confined” laundry rooms
* Furnaces installed in “confined” hobby or craft rooms
* Furnaces installed near chemical storage areas.
Exposure to the following substances in the combustion
air supply will also require OUTDOOR AIR for combustion:
* Permanent wave solutions
* Chlorinated waxes and cleaners
* Chlorine based swimming pool chemicals
* Water softening chemicals
* Deicing salts or chemicals
* Carbon Tetrachloride
* Halogen type refrigerants
* Cleaning solvents (such as perchloroethylene)
* Printing inks, paint removers, varnish, etc.
* Hydrochloric acid
* Cements and glues
* Antistatic fabric softeners for clothes dryers
* Masonry acid washing materials
UNCONFINED
AIR FOR COMBUSTION AND VENTILATION
If these furnaces are installed in a nondirect vent capacity then the adequate flow of combustion and ventilating
air must not be obstructed from reaching the furnace. Air
openings provided for combustion air must be kept free of
obstructions which restrict the flow of air. Airflow restrictions affect the efficiency and safe operation of the furnace. Keep this in mind should you choose to remodel or
change the area which contains your furnace. Furnaces
must have a free flow of air for proper performance.
Provisions for combustion and ventilation air shall be
8 18-CD33D1-4
Furnace locations may be in a “confined space” or an
“unconfined space”.
Unconfined space is defined in Figure 5. These spaces may have adequate air by infiltration to provide air
for combustion and ventilation. Buildings with tight
construction (for example, weather stripping, heavily
insulated, caulked, vapor barrier, etc.), may need additional air to be provided as described for confined space.
Confined spaces are installations with less than 50 cu. ft.
of space per 1000 BTU/ hr input from all equipment installed. Air for combustion and ventilation requirements
can be supplied from inside the building as in Figure 8 or
from the outdoors, as in Figure 9.
Page 9
Installer’s Guide
6
MINIMUM AREA IN SQUARE FEET
FOR UNCONFINED SPACE INSTALLATIONS
FURNACE MAXI-
MUM BTUH INPUT
RATING
60,000
80,000
100,000
120,000
1. All air from inside the building as in Figure 8: The
confined space shall be provided with two permanent openings communicating directly with an additional room(s) of sufficient volume so that the combined volume of all spaces meets the criteria for an
unconfined space. The total input of all gas utilization
equipment installed in the combined space shall be
considered in making this determination. Refer to Table 2 for minimum open areas requirements.
WITH 8 FT. CEILING
MINIMUM AREA IN SQUARE FEET
OF UNCONFINED SPACE
375
500
625
875
8
9
7
CONFINED
SPACE
2. All air from outdoors as in Figure 9: The confined
space shall be provided with two permanent openings, one commencing within 12 inches of the top
and one commencing within 12 inches of the bottom
of the enclosure. The openings shall communicate directly, or by ducts, with the outdoors or spaces (crawl
or attic) that freely communicate with the outdoors.
Refer to Table 2, for minimum open areas requirements.
TABLE 2
MINIMUM FREE AREA IN SQUARE INCHES
EACH OPENING (FURNACE ONLY)
Furnace
Maximum
BTUH/INPUT
Rating
40,000
60,000
80,000
97,000
110,000
Air
From
Inside
100
100
100
100
110
Air From Outside
Vertical
Duct
10
15
20
25
28
Horizontal
Duct
20
30
40
50
55
18-CD33D1-4 9
Page 10
Installer’s Guide
DUCT CONNECTIONS
Air duct systems should be installed in accordance with
standards for air conditioning systems, National Fire
Protection Association Pamphlet No. 90. They should be
sized in accordance with ACCA Manual D or whichever is
applicable.
Central furnaces, when used in connection with cooling
units, shall be installed in parallel or on the upstream side
of the cooling coil to avoid condensation in the heat exchanger. With a parallel flow arrangement, the dampers
or other means used to control flow of air shall be adequate to prevent chilled air from entering the furnace, and
if manually operated, must be equipped with means to
prevent operation of either unit unless the damper is in
full heat or cool position.
On any job, flexible connections of nonflammable material may be used for return air and discharge connections
to pre vent transmission of vibration. Though these units
have been specifically designed for quiet, vibration free operation, air ducts can act as sounding boards and could,
if poorly installed, amplify the slightest vibration to the annoyance level.
When the furnace is located in a utility room adjacent to
the living area, the system should be carefully designed
with returns to minimize noise transmission through the
return air grille. Although these furnaces are designed
with large blowers operating at moderate speeds, any
blower moving a high volume of air will produce audible
noise which could be objectionable when the unit is located very close to a living area. It is often advisable to route
the return air ducts under the floor or through the attic.
Such design permits the installation of air return remote
from the living area (i.e. central hall).
When the furnace is installed so that the supply ducts
carry air circulated by the furnace to areas outside the
space containing the furnace, the return air shall also be
handled by a duct(s) sealed to the furnace and terminating outside the space containing the furnace.
RETURN AIR DUCT SYSTEMS
Where there is no complete return duct system, the
return connection must be run full size from the furnace to a location outside the utility room, basement,
attic, or crawl space.
Do Not install return air through the back of the furnace
cabinet
Do Not install return air through the side of the furnace
cabinet on horizontal applications.
PREPARATION FOR UPFLOW BOTTOM AND SIDE
RETURN AIR FILTER INSTALLATION
All return air duct systems should provide for installation
of return air filters.
1. Determine the appropriate position to set the furnace
in order to existing supply and return ductwork.
2. The return air filter is shipped in either the bottom or
side location. Remove the filter by first turning the
two latches on the blower door and tilting the door
forward to remove. Remove the filter by sliding it out.
3. For upflow side return installations, remove the
insulation around the opening in the blower compartment.
4. The side panels of the upflow furnace include locating notches that are used as guides for cutting an
opening for return air, refer to Figure 10 and the
outline drawing on page 5 for duct connection dimensions for various furnaces.
5. If a 3/4" flange is to be used for attaching the air inlet
duct, add to cut where indicated by dotted lines in
Figure 10. Cut corners diagonally and bend outward
to form flange.
6. If flanges are not required, and a filter frame is
installed, cut between locating notches (See Figure
10).
7. The bottom panel of the upflow furnace must be removed for bottom return air. After removing the filter,
lay the furnace on its back. Remove the two 5/16"
hex screws securing the front of the bottom channel to the cabinet. Rotate the channel downward (or
remove by lowering the front edge of the channel and
pulling forward). Slide the bottom return air panel out
of the cabinet. Rotate the front channel to its original
position and reinstall the two 5/16” screws.
8. The filter retainer is factory supplied for upflow bottom return. Use the filter retainer on side or bottom if
filter is to be used within the furnace cabinet on upflow only installations.
NOTE:
Minimum return air temperature is 55° F.
All return air duct systems should provide for installation
of return air filters.
10 18-CD33D1-4
Page 11
Installer’s Guide
Filter
Rack
Furnace
Cabinet
Side
Filter Rack
Retaining
Screw/Pin
Engagement Hole
For
Bottom Return
Filter Rack
Installation With
9. The horizontal installation of the upflow furnace
requires an external filter section. Do NOT use
the bottom return filter within the furnace. Filter
kits are available for horizontal applications.
10. Connect duct work to furnace. See Outline Drawing
for supply and return duct size and location. Flexible
duct con nectors are recommended to connect both
supply and return air ducts to the furnace. If only the
front of the furnace is accessible, it is recommended
that both supply and return air plenums are
removable.
RETURN AIR FILTERS
TYPICAL UPFLOW RETURN
AIR FILTER INSTALLATIONS
furnaces require high velocity type air filters. The filters
may be installed within the furnace blower compartment
for UPFLOW furnaces in either a BOTTOM or SIDE (left
side or right side) return air inlet. Some filters may need
to be trimmed for side or bottom filter use.
UPFLOW FURNACE ONLY
0
LOCATING NOTCHES PROVIDED FOR
SIDE RETURN
CUTOUT
CUT OUT FOR
SIDE FILTER
TABLE 3
UPFLOW FURNACE RETURN AIR FILTERS
CABINET
WIDTH
14-1/2"114" X 25" X 1"17-1/2" X 25" X 1"
17-1/2"117" X 25" X 1"17-1/2" X 25" X 1"
21"120" X 25" X 1"17-1/2" X 25" X 1"
24-1/2"124" X 25" X 1"17-1/2" X 25" X 1"
**NOTE: For upflow 5 ton airflow models where the airflow
requirement exceeds 1800 CFM - Models will require return air
openings and filters on: (1) both sides, or (2) one side and the
bottom, or (3) just on the bottom
NOTE: For upflow 5 ton airflow models where the airflow requirement exceeds 1800 CFM - Models will require return air openings and filters on: (1) both sides,
or (2)1 side and the bottom, or (3) just the bottom.
QTY*
CABINET
BOTTOM FIL-
TER
CABINET
SIDE FILTER
The furnace and the bottom filter rack, BAYRACK960, installation can be seen in Figure 11.
The furnace filter in the bottom or side configuration can
be removed by simply turning the two latches on the
blower door and tilting the door forward.
ALTERNATE FILTER RACK INSTALLATION FOR
BOTTOM RETURN - BAYRACK960
*SEE OUTLINE DRAWING
q
BOTTOM FILTER RACK INSTALLATION
Airflow
FRONT
of Furnace
The following checklist should be used when installing a
bottom return filter on an upflow furnace:
a. Remove the filter.
b. Remove the bottom panel.
c. With the filter removed, the filter rack is com-
pressed and then inserted into the bottom of the
furnace. The retaining screw/pin on each side
inserts into engagement holes at the bottom of the
furnace cabinet side. See Figure 12.
d. Reinstall the furnace filter in the bottom position
by inserting the chamfer end first into the filter rack.
w
18-CD33D1-4 11
Page 12
Installer’s Guide
RETAINING
PIN
(Both Sides)
SPRINGS
SIDE
CUTOUT
FILTER
RACK
RAILS
BOTTOM
PANEL
INSTALLED
Airflow
RETAINING
PIN
(Both Sides)
SPRINGS
SIDE
CUTOUT
FILTER
RACK
RAILS
BOTTOM
PANEL
INSTALLED
Airflow
Filter
Rack
Assembly
Furnace
Blower
Deck
Filter Rack
Retaining
Screw/Pin
Engagement Hole
For
Return
Filter Rack
Installation With
Side
Furnace
Cabinet
Side
Bottom Panel
Filter
Rack
Furnace
Cabinet
Side
Filter Rack
Retaining
Screw/Pin
Engagement Hole
For
Bottom Return
Filter Rack
Installation With
ALTERNATE FILTER RACK INSTALLATION FOR SIDE
RETURN AIR ON UPFLOW FURNACES (Left or Right)
BAYRACK960
The following checklist should be used when installing a
right or left side return filter on an upflow furnace:
a. Remove the filter.
b. Leave the bottom panel in place.
c. Make side cutout by following the directions in the
“Return Air Duct Connections” section on page 10.
d. Compress the filter rack and reinstall in the side
position on the furnace. Confirm that the upper
retaining pin/screw locks into the engagement
hole in the blower deck and the lower pin/screw
rests against the side of the bottom panel. See
Figures 13-16.
e. Reinstall the furnace filter in the side position by
inserting the chamfer end first into the filter rack.
t
BLOWER
DECK
y
e
Typical Upflow Left Side Return Filter Rack Installation
r
Typical Upflow Right Side Return Filter Rack Installation
12 18-CD33D1-4
Conversion kits for horizontal filters are BAYFLTR203 for
17 1/2" width cabinets, BAYFLTR204 for 21" width cabinets, and BAYFLTR205 for 24" width cabinets. These include filters and brackets necessary for horizontal filters.
See Figure 19, Downflow/Horizontal.
RETURN AIR FILTERS FOR UPFLOW FURNACE IN
HORIZONTAL CONFIGURATION
When the Upflow Furnace is installed in the horizontal
configuration, the return air filters must be installed exterior to the furnace cabinet. Remote filter grilles may be
used for homeowner convenience or the filters may be
installed in the duct work upstream of the furnace. See
Figure 17.
u
Airflow
Accessory filter kit
BAYFLTR203, 204, or
205 used for Upflow
Horizontal furnaces
Typical Horizontal Filter Installation
Page 13
Installer’s Guide
SIDE
CUT-OUT
ALTERNATE SIDE
FILTER CLIPS
LOCATIONS
ALTERNATE BOTTOM
FILTER CLIPS LOCATIONS
UPFLOW FILTER CLIP/BRACKET INSTALLATION
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. See
Figure 18. Attach clip to bottom channel and rear of
unit with screws provided for bottom return.
2. Install the clips in front and rear of the desired location using the screws provided. The filter clip with the
leaf spring mounts in the rear of the cabinet.
i
TYPICAL DOWNFLOW FURNACE RETURN AIR
FILTER INSTALLATIONS
These furnaces require high velocity type air filters.
Downflow furnace filters must be located outside the
furnace cabinet. Typical installations are shown in Figure
19. Tables 4, 5 and 6 provide information for installation
of the filter retaining brackets shipped with downflow
furnaces.
* Location dimension is from end of duct to the screw holes for the bracket.
CABINET
WIDTH
14-1/2"13-1/4"12"14"
17-1/2"16-1/4"15"14"
21"19-3/4"19-1/2"14"
24-1/2"23-1/4"22"14"
RETURN
DUCT
WIDTH
FILTER
SIZE
TABLE 5
FILTER ACCESS
OPENING - DI-
MENSION "A"
FILTER BRACKET
LOCATION *
FILTER ACCESS
OPENING -
DIMENSION "B"
DOWNFLOW
o
MINIMUM CLEARANCE FROM COMBUSTIBLE MATERIALS FOR
UPFLOW/HORIZONTAL AND DOWNFLOW/ HORIZONTAL FURNACES
UNIT LOCATION
FURNACE SURFACE
SIDES0"1"0"
BACK0"3"6"
TOP1"1"1"
FRONT3"3"18"
VENT0"0"0"
NOTE: CLEARANCE REQUIRED AT TOP OF PLENUM IS 1"
18-CD33D1-4 13
Airflow
VERTICAL
CLOSET
Optional accessory door kit BAYFLTR206 is also available with
narrow door to avoid flue piping in downflow furnaces.
DOWNFLOW/
HORIZONTAL
Airflow
TABLE 6
HORIZONTAL
CLOSET
HORIZONTAL
ALCOVE / ATTIC
Page 14
Installer’s Guide
GENERAL VENTING
THIS FURNACE MUST BE VENTED TO THE OUTDOORS. THESE FURNACES ARE INDUCED DRAFT
VENTED AND MUST NOT BE CONNECTED TO ANY
VENT SERVING ANOTHER APPLIANCE. PLEASE
NOTE THAT THESE FURNACES USE POSITIVE-PRES-SURE VENT SYSTEMS.
Proper venting is essential to obtain maximum efficiency
from a condensing furnace. Proper installation of the vent
system is necessary to assure drainage of the condensate and prevent deterioration of the vent system.
American Gas Association has certified the design of
condensing furnaces for a minimum of 0" clearance from
combustible materials with a single wall plastic vent pipe.
The recommended system is assembled from 2", 2-1/2",
or 3" plastic pipe and fittings (See Table 7, page 12).
Where the system is routed to the outdoors through an
existing masonry chimney containing flue products from
another gas appliance, or where required by local codes,
then 3" venting of Type 29-4C stainless steel must be
used in place of PVC material.
These furnaces have been classified as CATEGORY
IV furnaces in accordance with the latest edition of
ANSI Z21.47 • CAN/CGA-2.3 Standards. Category IV furnaces operate with positive vent pressure and with a vent
gas temperature less than 140° F above the dewpoint.
These conditions require special venting systems, which
must be gas tight and water tight.
NOTE:
When an existing furnace is removed from a venting
system serving other gas appliances, the venting system is likely to be too large to properly vent the remaining attached appliances.
The following steps shall be followed with each appliance
remaining connected to the common venting system
placed in operation, while the other appliances remaining
connected to the common venting system are not in operation.
1. Seal any unused openings in the common venting
system.
2. Visually inspect the venting system for proper size
and horizontal pitch and determine there is no blockage or restriction, leakage, corrosion or other deficiencies which could cause an unsafe condition.
3. Insofar as is practical, close all building doors and
windows and all doors between the space in which
the appliances remaining connected to the common
venting system are located and other spaces of the
building. Turn on clothes dryers and any appliances
not connected to the common venting system. Turn
on any exhaust fans, such as range hoods and bathroom exhausts, so they will operate at maximum
speed. Do not operate a summer exhaust fan, close
fireplace dampers.
4. Follow the lighting instructions. Place the appliance
being inspected in operation. Adjust thermostat so
appliance will operate continuously.
5. Test for spillage at the draft hood relief opening after
5 minutes of main burner operation. Use the flame of
a match or candle, or smoke from a cigarette, cigar,
or pipe.
6. After it has been determined that each appliance remaining connected to the common venting system
properly vents when tested as outlined above, return
door, windows, exhaust fans, fireplace dampers and
any other gas-burning appliance to their previous
conditions of use.
If improper venting is observed during any of the above
tests, the remaining common venting system must be
corrected. Correction of the remaining common vent
system should be done by referring to the latest edition
of 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. The following are
general steps to be used to correct or resize a remaining
vent system when a furnace which may not be common
vented is removed from the system:
a. Determine the Btu per hour input of all remaining
appliances attached to the venting system.
b. Determine the diameter, rise, and lateral of the ex-
isting venting system, as well as quantity and type
of bends.
c. Use the appropriate tables in the latest edition of
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.
IMPORTANT:
These furnaces may be installed as Direct Vent (sealed combustion) or as Nondirect vent (single pipe). The furnaces are
shipped DIRECT VENT with sealed combustion. For DIRECT VENT APPLICATION: The furnaces must be vented to the
exterior of the house and combustion air MUST come through the inlet air pipe FROM OUTSIDE AIR. For NONDIRECT VENT APPLICATION: The furnace shall be vented to the exterior of the house, but combustion air may enter from the
surrounding area as long as combustion air requirements are met. (See AIR FOR COMBUSTION AND VENTILATION)
14 18-CD33D1-4
Page 15
Installer’s Guide
PVC VENT FITTING MATERIAL
These fittings are available from your Gas Furnace
Distributors.
Straight Pipe Sections, Couplings, 45° Elbows, 60° Elbows, 90° Elbows, Vent or Sanitary Tee, or other necessary fittings may be 2", 2½", 3", or 4" diameter. The allowable materials are shown in Table 7.
VENT FITTING MATERIAL – PLASTIC
Gas and liquid tight single wall vent fittings, designed for
resistance to corrosive flue condensate, MUST be used
throughout.
Listed in Table 8 & 9 are 2", 2½", 3", and 4" size fittings
that meet these requirements. The materials listed are
various grades of PVC and ABS plastic.
socket and pipe with cleaner-primer. Apply a liberal
coat of primer to inside surface of socket and outside
of pipe.
DO NOT ALLOW PRIMER TO DRY BEFORE AP-
PLYING CEMENT.
3. Apply a thin coat of cement evenly in the socket.
Quickly apply a heavy coat of cement to the pipe end
and insert pipe into fitting with a slight twisting movement until it bottoms out.
4. Hold the pipe in the fitting for 30 seconds to prevent
tapered socket from pushing the pipe out of the fitting.
5. Wipe all excess cement from the joint with a rag. Allow 15 minutes before handling. Cure time varies according to fit, temperature and humidity.
PIPE JOINTS: All joints must be fastened and sealed to
prevent escape of combustion products into the building.
TABLE 7
PLASTIC PIPE DESIGNATIONS
PVC
ASTM STANDARD PIPE TYPEALLOWABLE TEMPERATUREMARKING
F891CELLULAR CORE*158ASTM F891
D2665DWV PIPE**158ASTM D2665
D1785SCH 40, 80, 120**158ASTM D1785
D2241SDR SERIES**158ASTM D2241
CPVC
ASTM STANDARDPIPE TYPEALLOWABLE TEMPERATURE MARKING
D2846CPVC 41**212ASTM D2846
F441SCH 40, 80**212ASTM F441
F442SDR SERIES**212ASTM F442
ABS
ASTM STANDARD PIPE TYPEALLOWABLE TEMPERATUREMARKING
D2661SCH 40 DWV***180ASTM D2661
F628SCH 40 DWV CELLULAR CORE***180ASTM F628
* - Allowable temperatures based on classifications covered in ASTM D4396 [Deflection Temps Under Load (264 PSI)]
** - Allowable temperatures based on classifications covered in ASTM D1784 [Deflection Temps Under Load (264 PSI)]
*** - Allowable temperatures based on classifications covered in ASTM D3965 [Deflection Temps Under Load (264 PSI)]
NOTE:
It is recommended that the first joints from the furnace
be connected and sealed with high temperature RTV.
This will enable the pipes to be removed later without
cutting.
Be sure to properly support these joints.
BONDING OF PVC
Commercially available solvent cement must be used to
join the pipe and fittings. Follow instructions on the container carefully.
Procedure for Cementing Joints:
1. Cut pipe square, remove ragged edges and burrs.
Chamfer end of pipe, then clean fitting socket and
pipe joint area of all dirt, grease, moisture or chips.
2. After checking pipe and socket for proper fit, wipe
18-CD33D1-4 15
IMPORTANT:
Products installed in Canada must use vent systems that are certified to the Standard for Type BH
Gas Venting 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 primers, and glues must be from a
single system manufacturer 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 inspection.
Page 16
Installer’s Guide
Seal VENT PIPE
with RTV sealant
Seal INLET AIR PIPE
with RTV sealant
Front of Furnace
LABEL
SAYS
"TOP"
STRAIGHT SIDE MUST BE
ON BOTTOM FOR PROPER
CONDENSATE DRAINAGE.
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.
2" TO 3" COUPLING
FURNACE
VENT
OUTLET
FACTORY SUPPLIED ONLY
WITH THE FOLLOWING
MODELS: *UH1C100A9H41B,
*UH1D120A9H51B, AND ALL
*DH1 DOWNFLOW MODELS
#CPL00938
VENT AND INLET AIR CONNECTIONS
p
NOTE:
Follow venting instructions carefully when using PVC
cement.
IMPORTANT:
All joints must be water tight. Flue condensate is somewhat
acidic, and leaks can cause equipment damage.
Connection of the pipe and collar of the combustion air
inlet should just be a friction fit. It is recommended that
the inlet air joint be sealed with RTV type sealant to allow
the joint to be separated for possible future service. The
inlet and vent pipes must be properly supported throughout the entire length.
Connection of the vent pipe to the vent collar should also
be accomplished using RTV type sealant. This type sealant provides a connection which remains flexible and can
be separated in the future if service needs require the removal of the vent pipe for service or clearance.
a
s
NOTE:
To ensure proper operation at the vent lengths indicated, the combustion air inlet and vent terminals should
be in the same pressure zone. Terminating the vent and
inlet in different pressure zones will change the maximum vent lengths and may cause nuisance tripping of
the pressure switch(es). The amount of change can not
be predicted. The selection of the inlet and outlet terminal locations are the responsibility of the designer/installer. If the installer chooses separate pressure zones
for the terminals, the combustion air inlet termination
must be in the higher (more positive) pressure zone.
HORIZONTAL VENTING
NOTE:
Vent termination kit BAYAIR30AVENTA or BAYVENT200B may be used in addition to the horizontal
and vertical termination options shown in Figure 26.
See Figure 31.
For Canadian applications ONLY: IPEX 196006 may
be used for horizontal and vertical terminations. IPEX
081216, IPEX 081218, and IPEX 081219 may only be
used for horizontal vent terminations.
HORIZONTAL INSTALLATION
Upflow/ Horizontal
NOTE:
In horizontal venting when the factory supplied “offset” (2X3 reducing coupling) is used for 3” vent pipe
installation, make sure the marking “Top” is located on
the top side of the pipe. The straight side must be on
bottom for proper condensate drainage. This coupling
is only factory supplied with *UH1C100A9H41B, *UH1D120A9H51B, and all downflow models.
16 18-CD33D1-4
Page 17
Installer’s Guide
Vent only
to outside
Air Inlet
A
A = 2' minimum
DOWNFLOW
FURNACE
Vent only
to outside
Air Inlet
B
A
A (0-2') or greater
B (0-2') or greater
A+B = 2' minimum
UPFLOW FURNACE
TABLE 8 - UPFLOW/ HORIZONTAL VENTING TABLE
MAXIMUM VENT LENGTH:
DIRECT VENT (2 PIPE SYSTEM) -
MAXIMUM TOTAL EQUIVALENT FEET FOR
MODEL
*UH1B040A9H21B
*UH1B060A9H31B
*UH1B080A9H31C
*UH1C100A9H41B
*UH1D120A9H51B
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 BAYAIR30AVENTA 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.
8. For Canadian applications ONLY, IPEX 196006 may be used for horizontal and vertical terminations. IPEX 081216, IPEX 081218, and IPEX 081219 may only be used for
NOT ALLOWEDNOT ALLOWED90130NOT ALLOWED NOT ALLOWED70130
NOT ALLOWED NOT ALLOWED50130NOT ALLOWED NOT ALLOWED30130
VENT AND INLET AIR PIPES (See Notes)
2" PIPE
& FITTINGS
6080100130508080130
6080100130508080130
4080100130308080130
2-1/2" PIPE
& FITTINGS
3" PIPE
& FITTINGS
4" PIPE
& FITTINGS
NONDIRECT VENT (1 PIPE SYSTEM) -MAXIMUM TOTAL
EQUIVALENT FEET FOR VENT PIPES ONLY (See Notes)
2" PIPE
& FITTINGS
2-1/2" PIPE
& FITTINGS
3" PIPE
& FITTINGS
& FITTINGS
4" PIPE
TABLE 9 - DOWNFLOW/ HORIZONTAL VENTING TABLE
MAXIMUM VENT LENGTH:
DIRECT VENT (2 PIPE SYSTEM) -
MAXIMUM TOTAL EQUIVALENT FEET FOR
MODEL
& FITTINGS
*DH1B040A9H21B
*DH1B065A9H31B
*DH1C085A9H41B
*DH1D110A9H51B
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 BAYAIR30AVENTA 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.
8. For Canadian applications ONLY, IPEX 196006 may be used for horizontal and vertical terminations. IPEX 081216, IPEX 081218, and IPEX 081219 may only be used for
6 inches (15 cm) for appliances =/< 10,000 Btuh (3
B=Clearance to window or door that may be opened
C=Clearance to permanently closed window**
Vertical clearance to ventilated soffit located above
D=
the 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
H=
above meter/regulator assembly
I=Clearance to service regulator vent outlet3 feet (91 cm)*
Clearance to nonmechanical air supply inlet to
J=
building or the combustion air inlet to any other
appliance
K=Clearance to a mechanical air supply inlet6 feet (1.83m)3 feet (91 cm) above if within 10 feet (3m) horizontally
Clearance above a paved sidewalk or paved drive-
L=
way 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.
kw), 12 inches (30 cm) for appliances > 10,000 Btuh
(3 kw) and =/< 100,000 Btuh (30 kw), 36 inches (91
cm) for appliances > 100,000 Btuh (30 kw)
3 feet (91 cm) with a height 15 feet (4.5 m) above the
6 inches (15 cm) for appliances =/< 10,000 Btuh (3
kw), 12 inches (30 cm) for appliances > 10,000 Btuh
(3 kw) and =/< 100,000 Btuh (30 kw), 36 inches (91
cm) for appliances > 100,000 Btuh (30 kw)
12 inches (30 cm)12 inches (30 cm)
6 inches (15 cm) for appliances =/< 10,000 Btuh (3 kw),
9 inches (23 cm) for appliances > 10,000 Btuh (3 kw)
and =/< 50,000 Btuh (15 kw), 12 inches (30 cm) for appliances > 50,000 Btuh (15 kw)
**
meter/regulator assembly
6 inches (15 cm) for appliances =/< 10,000 Btuh (3 kw),
9 inches (23 cm) for appliances > 10,000 Btuh (3 kw)
and =/< 50,000 Btuh (15 kw), 12 inches (30 cm) for appliances > 50,000 Btuh (15 kw)
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
H=
meter/regulator assembly
I=Clearance to service regulator vent outlet3 feet (91 cm)*
Clearance to nonmechanical air supply inlet to building
J=
or the combustion air inlet to any other appliance
K=Clearance to a mechanical air supply inlet6 feet (1.83m)
Clearance above a paved sidewalk or paved driveway
L=
located on public property
M=Clearance under veranda, porch, deck, or balcony`12 inches (30 cm) ‡*
Notes:
1. In accordance with the current CSA B149.1 Natural Gas and Propane Installation Code.
2. In accordance with the current ANSI Z223.1/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.
inches (30 cm) for appliances > 10,000 Btuh (3 kw) and =/<
100,000 Btuh (30 kw), 36 inches (91 cm) for appliances >
100,000 Btuh (30 kw)
3 feet (91 cm) with a height 15 feet (4.5 m) above the meter/
6 inches (15 cm) for appliances =/< 10,000 Btuh (3 kw), 12
inches (30 cm) for appliances > 10,000 Btuh (3 kw) and =/<
100,000 Btuh (30 kw), 36 inches (91 cm) for appliances >
100,000 Btuh (30 kw)
12 inches (30 cm)12 inches (30 cm)
4 feet (1.2m) below or to the side
of opening; 1 foot (0.3m) above
opening.
**
regulator assembly
4 feet (1.2 m) below or to side of
opening; 1 foot (300 m) above
opening
3 feet (91 cm) above if within 10 feet
(3m) horizontally
7 feet (2.13 m) †7 feet (2.13 m)
*
g
POSSIBLE CONFIGURATIONS FOR TWO PIPE VENTING SYSTEMS
ELBOW AND TEE MUST BE
AS CLOSE TOGETHER
AS POSSIBLE
18-CD33D1-4 19
Page 20
Installer’s Guide
▲
CAUTION
!
VENT
COMBUSTION
AIR
VENT
VENT
PLATE
VENT
CAP
12" MINIMUM
TO OVERHANG
MAINTAIN 12" MINIMUM CLEARANCE
ABOVE HIGHEST ANTICIPATED SNOW
LEVEL OR GRADE WHICHEVER IS GREATER
SCREWS
(4 req.)
ANCHORS
(4 req.)
7.2"
3.2"
COUPLING
(PLASTIC
VENTING)
STUD
PVC WALL
MOUNT FLANGE
(OPTIONAL)
APPROVED
TERMINATION
1” CLEARANCE
(AIR SPACE)
VENTING THROUGH COMBUSTIBLE WALLS
Pitch - 1/4 Inch Per Foot
CLEARANCE (0” ACCEPTABLE FOR PVC VENT PIPE)
(1” ACCEPTABLE FOR TYPE 29-4C STAINLESS STEEL VENT PIPE)
When the vent pipe is exposed to temperatures below
freezing, i.e., when it passes through unheated spaces,
etc., the pipe must be insulated with 1/2 inch (22.7 mm)
thick Armaflex-type insulation or equal. If the space
is heated sufficiently to prevent freezing, then the insulation would not be required. If domestic water pipes
are not protected from freezing then it is assumed the
space meets the condition of a heated space.
HORIZONTAL VENTING THROUGH WALL
These furnaces may be installed as direct vent (as
shipped) or as nondirect vent. Installation must conform to national, state, and local codes.
The vent & inlet terminals must be located at least 12"
minimum above normally expected snow accumulation
level (18" minimum in Canadian applications).
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 24 for either direct or
non-direct vent applications.
PITCH – Venting through the wall must maintain 1/4"
per foot pitched upward to insure that condensate 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 moisture, it is recommended that a corrosion resistant shield (24 inches
square) be used behind the vent terminal. This shield can
be wood, plastic, sheet metal, etc. Also, silicone caulk all
cracks, seams and joints within 3 feet of the vent terminal.
h
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 outside of wall. Use screws or anchor type fasteners suited
to the outside or inside wall surfaces.
NONCOMBUSTIBLE MATERIAL WALL
The hole through the wall must be large enough to maintain pitch of vent and properly seal.
Use cement mortar seal on inside and outside of wall.
See Figure 29.
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)
j
BAYAIR30AVENTA
(Sidewall)
For Canadian applications only, IPEX 196006, IPEX 081216, IPEX
081218, and IPEX 081219 may be used for horizontal vent terminations.
NOTE:
No vent cap as shown in Figure 33 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.
For Canadian applications only, IPEX 196006, IPEX 081216, IPEX
081218, and IPEX 081219 may be used for horizontal vent terminations.
COMBUSTIBLE MATERIAL WALL
BAYVENT200B
A minimum clearance of 1" to combustible materials must
be maintained when using single wall stainless steel
venting. See Figure 28.
20 18-CD33D1-4
k
Page 21
Installer’s Guide
40" UPFLOW OR
DOWNFLOW MODELS
SEE VENTING TABLE
OUTSIDE
WALL
NOTE: ANY FITTINGS PASSING
THROUGH AN UNHEATED SPACE
MUST BE INSULATED.
FIRST SUPPORT SHOULD BE AS
CLOSE TO FURNACE CONNECTION
AS POSSIBLE.
UPWARD PITCH -- 1/4" PER FOOT
STRAPS OR OTHER SUITABLE SUPPORTS
AT MAXIMUM OF 3'-0" INTERVALS
COMBUSTION
AIR INLET
USE ONLY
APPROVED
TERMINATION
3" PIPING
2", 2-1/2"
or 3" PIPING
REDUCING
COUPLING,
FIELD SUPPLIED
IF NEEDED
SEAL ALL
WALL CAVITIES
RAIN CAP
COMBUSTION AIR
STRAP
(FIELD SUPPLIED)
COMBUSTION
AIR
VENT
ELBOW
(FIELD
SUPPLIED)
VENT
1" + 1/2"
COUPLING
(PLASTIC
VENTING)
PVC WALL
MOUNT FLANGE
(OPTIONAL)
APPROVED
TERMINATION
CEMENT
MORTAR SEAL
INSIDE &
OUTSIDE
VENTING THROUGH NON-COMBUSTIBLE WALLS
Pitch - 1/4 Inch Per Foot
SUPPORT HORIZONTAL PIPE EVERY
3' 0" WITH THE FIRST SUPPORT AS
CLOSE TO THE FURNACE AS POSSIBLE.
INDUCED DRAFT BLOWER, HOUSING,
AND FURNACE MUST NOT SUPPORT
THE WEIGHT OF THE FLUE PIPE.
NOTE: VENT AND INLET MUST BE SUPPORT-
ED AT A MAXIMUM OF 3' INTERVALS
BAYAIR30AVENTA
18-CD33D1-4 21
For Canadian applications only, IPEX 196006,
IPEX 081216, IPEX 081218, and IPEX 081219
may be used for horizontal vent terminations.
TEE
BAYVENT200B
Page 22
Installer’s Guide
6" Min.
40 Inch
Upflow or
Downflow
Furnace
Slope 1/4" per ft.
Slope 1/4" per ft.
MAINTAIN 12 IN.
(18 IN. FOR CANADA)
MINIMUM CLEARANCE
ABOVE HIGHEST
ANTICIPATED SNOW
LEVEL. MAXIMUM OF
24 IN. ABOVE ROOF.
VENT
COMBUSTION
AIR
REMOVE RIBS
FROM CAP
COMBUSTION
AIR
ROOF BOOT
(FIELD SUPPLIED)
COMBUSTION
AIR
VENT
ELBOW
(FIELD SUPPLIED)
MAINTAIN 12 IN.
(18 IN. FOR CANADA)
MINIMUM CLEARANCE
ABOVE HIGHEST
ANTICIPATED SNOW
LEVEL. MAXIMUM OF
24 IN. ABOVE ROOF
SUPPORT
(FIELD SUPPLIED)
VENT
12 INCHES MIN. CLEARANCE MUST BE
MAINTAINED ABOVE HIGHEST
ANTICIPATED SNOW LEVEL.
MAXIMUM NOT TO EXCEED
24 INCHES ABOVE ROOF.
DOWNWARD VENTING
Furnace may be in vertical
x
or horizontal configuration.
DOWNWARD VENT
LENGTH IS LIMITED
TO A MAXIMUM OF 15
EQUIVALENT FEET.
All horizontal pipes must be supported
at a maximum of 3 foot intervals
NOTES:
A) Condensate trap for vent pipe must be a minimum
of 6 inches in height.
B) Condensate trap for vent and inlet pipe must be
connected into a condensate drain pump; an open
or vented drain; or it can be connected to the outlet hose of the furnace's condensate trap. Outdoor
draining of the furnace and coil condensate is permissible if allowed by local codes. Caution should
be taken to prevent drains from freezing or causing
slippery conditions that could lead to personal injury. Excessive draining of condensate may cause
saturated ground conditions that may result in
damage to plants.
C) The condensate trap should be primed at initial
start up prior to heating season operation.
NOTE:
Both venting methods shown in Figure 30 & 31 must
also have the combustion air inlet installed - meeting
dimension requirements of Figure 21.
c
v
BAYAIR30AVENTA
CONCENTRIC VENT
ROOF TOP APPLICATION
For Canadian applications
only, IPEX 196006 may
be used for vertical vent
terminations.
VENTING ROUTED THROUGH A MASONRY CHIMNEY
VENT FITTING MATERIAL – STAINLESS STEEL
Gas and liquid tight single wall metal vent fitting, designed for resistance to corrosive flue condensate such
as Type 29-4C MUST be used throughout.
These fittings and fitting accessories are to be supplied
locally.
DIRECTION OF STAINLESS STEEL FITTING
All stainless steel fitting must be installed with male end
towards the furnace.
All horizontal stainless steel sections must be positioned
with the seam on top.
All long horizontal sections must be supported to prevent
sagging.
All pipe joints must be fastened and sealed to prevent escape of combustion products into the building.
22 18-CD33D1-4
b
CONCENTRIC VENT
ROOF INSTALLATION
For Canadian applications only, IPEX 196006 may be used for
vertical vent terminations.
Page 23
Installer’s Guide
▲
CAUTION
!
IMPORTANT:
The Commonwealth of Massachusetts requires compliance
with regulation 248 CMR 4.00 and 5.00 for installation of
through – the – wall vented gas appliances as follows:
For all side wall horizontally vented gas fueled equipment
installed in every dwelling, building or structure used in whole
or in part for residential purposes, including those owned
or operated by the Commonwealth and where the side wall
exhaust vent termination is less than seven (7) feet above
finished grade in the area of the venting, including but not
limited to decks and porches, the following requirements shall
be satisfied:
1. INSTALLATION OF CARBON MONOXIDE DETECTORS.
At the time of installation of the side wall horizontal vented
gas fueled equipment, the installing plumber or gasfitter shall
observe that a hard wired 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 backup 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”.
4. INSPECTION. The state or local gas inspector of the
side wall horizontally vented gas fueled equipment shall not
approve the installation unless, upon inspection, the inspector
observes carbon monoxide detectors and signage installed
in accordance with the provisions of 248 CMR 5.08(2)(a)1
through 4.
This appliance requires a special venting system. If
BAYAIR30AVENTA or BAYVENT200B are used, a copy of
the installation instructions for the kit shall remain with the
appliance or equipment at the completion of installation. The
venting system installation instructions can be obtained from
the manufacturer by writing to the following address:
Trane
6200 Troup Highway
Tyler, TX 75707
Attention: Manager of Field Operations Excellence
The vent for this appliance shall not terminate
(1) Over public walways; or
(2) Near sofit vents or crawl space vents or other ar-
eas where condensate or vapor could create a nuisance or hazard or cause property damage; or
(3) Where condensate vapor could cause damage or
could be detrimental to the operation of regulators,
relief valves. or other equipment.
18-CD33D1-4 23
Page 24
Installer’s Guide
SUPPORT THE SINGLE WALL
STAINLESS STEEL GAS
VENTING AND CENTER IT IN
THE CHIMNEY OPENING WITH
ANGLES AS SHOWN OR
ANOTHER EQUIVALENT
MANNER.
NOTE:
HORIZONTAL VENTING
TO VERTICAL VENTING
6 IN. MIN.
SEE CAUTION
STAINLESS
STEEL
VENT CAP
(OPTIONAL)
GALVANIZED FIRESTOP SHOULD
BE FABRICATED WITH 3-7/8" DIA.
HOLE FOR SUPPORT FLANGE
(12" x 12" PANEL OR 12" DIA MIN.)
VENTING THROUGH CEILING
CEILING
SUPPORT
FLANGE
FLUE PIPE
COUPLING
SEAL BETWEEN FLANGE, PIPE,
COUPLING AND METAL PANEL
WITH HI TEMP RTV SILICONE SEALANT
CLEARANCE ( 0" ACCEPTABLE FOR PVC VENT PIPE )
( 1" ACCEPTABLE FOR TYPE 29-4C STAINLESS STEEL VENT PIPE )
SUPPORT THE SINGLE
WALL FLUE PIPE AND
CENTER IT IN THE
CHIMNEY OPENING WITH
ANGLES AS SHOWN OR
ANOTHER EQUIVALENT
MANNER.
NOTE:
HORIZONTAL VENTING
TO VERTICAL VENTING
6 IN. MIN.
STAINLESS
STEEL
VENT CAP
(OPTIONAL)
SEE CAUTION
FLUE PIPE
COUPLING
AS REQUIRED
FLUE PIPE
COUPLING TO SUPPORT
PIPE FROM ANGLES
OR OTHER SUITABLE
SUPPORT METHOD
n
TYPE 29-4C STAINLESS STEEL VENTING
m
IMPORTANT –
Refer to Section 12.6.8 of NFPA 54 / ANSI 223.1 2012
when routing vent piping through a chimney.
THROUGH UNUSED CHIMNEY
,
.
IMPORTANT –
Refer to Section 12.6.8 of NFPA 54 / ANSI 223.1 2012
when routing vent piping through a chimney.
PVC PLASTIC VENTING
THROUGH UNUSED CHIMNEY
IMPORTANT –
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
masonry chimney.
24 18-CD33D1-4
IMPORTANT –
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 masonry chimney.
Page 25
Installer’s Guide
▲
CAUTION
!
IT IS RECOMMENDED THAT A DRAIN PAN BE INSTALLED
UNDER THE FURNACE TO PREVENT PROPERTY DAMAGE,
PERSONAL INJURY OR DEATH FROM LEAKING CONDENSATE.
CONDENSATE DRAIN INSTRUCTIONS
VERTICAL APPLICATIONS
Upflow furnace - The connection tubing for left and right
side drainage is shipped in the blower compartment. Install the connection tubing from the trap to the side of the
unit and trim all excess tubing to avoid kinks. See Figures 40 and 42.
/
Downflow furnace - Use RTV silicon sealant to connect
the fitting to the trap for ease of removal when cleaning
the trap.
For left side drain a 1/2" slip PVC fitting is needed. See
Figure 44.
To change to a right side drain, remove the drain
lines from the trap, rotate the trap 180° so it exits to
the right, then reconnect the lines. Start with a 1/2"
90° CPVC street elbow connected to the trap using RTV silicon sealant. Run 1/2" CPVC pipe to a
CPVC elbow. Run 1/2" CPVC pipe from the elbow
out through the right side knock-out. See Figure 45.
HORIZONTAL APPLICATIONS
Upflow and Downflow furnaces - All horizontal applications
are left side only. It is always recommended that the auxiliary
drain pan be installed under a horizontally installed evaporator and/or 90% gas furnace. Connect the auxiliary drain
@
UPFLOW (VERTICAL)
UPFLOW HORIZONTAL
17" UNITS
(Left side only)
18-CD33D1-4 25
Use Inducer Drain
hose without
extension
Right side
!
Left side
UPFLOW (VERTICAL)
#
Use exten-
sion hose
here
UPFLOW HORIZONTAL 21" & 24" UNITS
(Left side only)
Page 26
Installer’s Guide
pan to a separate drain line (no trap is needed in this line).
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 recuperative cell. Remove the
larger drain line (from the secondary cell) and trim to fit
between the secondary cell and the new trap location. On
upflow units, plug the hole in the blower deck where the
tube went through.
Remove the hose from the induced blower and reposition
into the other drain tap of the inducer, which is located
90° clockwise around the inducer. Move the cap from that
drain tap to the unused drain tap. On upflow units, plug
the hole in the blower deck where the tube went through.
This tube on downflow units will need to be cut to fit between the inducer and the trap. On upflow units, this tube
may need to be extended, using the tubing shipped with
the furnace.
$
^
Cut off curved end of
Inducer drain hose
DOWNFLOW (HORIZONTAL)
Connections must be made to an OPEN/ VENTED
DRAIN. Outdoor draining of the furnace and coil con-
densate is permissible if allowed by local codes. Caution
should be taken to prevent drains from freezing or causing slippery conditions that could lead to personal injury.
Excessive draining of condensate may cause saturated
ground conditions that may result in damage to plants.
Left
side
DOWNFLOW (VERTICAL)
Right
%
side
NOTE:
Use 1/2" or larger PVC or CPVC pipe and fittings as required for drain connections (fittings, pipe and solvent
cement not provided).
NOTE:
A corrosion resistant condensate pump must be used
if a pump is required for a specific drain system.
IMPORTANT:
The condensate drain should be installed with provisions to
prevent winter freeze-up of the condensate drain line. Frozen condensate will block drains, resulting in fur nace shutdown. If the drain line cannot be installed in a conditioned
space, then UL listed heat tape should be applied as required to prevent freezing (per manufacturer’s instructions).
The heat tape should be rated at 5 or 6 watts per foot at
120 volts. Self-regulating (preferred) or thermostatically
controlled heat tape is required.
Evaporator and furnace condensate drain piping may
be manifolded together. A primary drain vent stack must
be installed and terminated below the outlet of the secondary heat exchanger drain connection to prevent water
from damaging furnace controls if the primary drain outlet
plugs up. Where the furnace is installed above a finished
ceiling, the primary drain vent stack must be installed
such that overflow from the vent stack opening will flow
into an axillary drain pan in order to prevent water damage to the finished ceiling below.
DOWNFLOW
(VERTICAL)
26 18-CD33D1-4
Use CPVC tubing from Trap outlet,
over burner box to cabinet exit
Page 27
ELECTRICAL CONNECTIONS
SEE
NOTE 6
From Dwg. B341437 Rev. 1
FURNACE
TWIN
SEE
NOTE 7
B/C
B/C
TO 115 V 1 PH.,
60 HZ., POWER
SUPPLY PER
LOCAL CODES
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.
Make wiring connections to the unit as indicated on enclosed wiring diagram. As with all gas appliances using
electrical power, this furnace shall be connected into a
permanently live electric circuit. It is recommended that
furnace be provided with a separate “circuit protection
device” in the electric circuit. The furnace must be electrically grounded in accordance with local codes or in
the absence of local codes with the National Electrical
Code, ANSI/ NFPA 70 or CSA C22.1 Electrical Code, if
an external electrical source is utilized. The integrated furnace control is polarity sensitive. The hot leg of the
120V power supply must be connected to the black power lead as indicated on the wiring diagram. Provision for
hooking up an electronic air cleaner and or humidifier is
provided on the integrated control.
Refer to the SERVICE FACTS literature and unit wiring
diagram attached to furnace diagram attached to furnace.
TWINNING FURNACES
These furnaces may be twinned. Twinning requires that
two furnaces with the same configuration, capacity,
and airflow must be used. They shall have common returns with equal pressure drops or ducts with equivalent
lengths and sizes. See Field Wiring Diagrams for proper
hookup.
Installer’s Guide
&
18-CD33D1-4 27
Page 28
Installer’s Guide
OUTDOOR UNIT
(NO TRANSFORMER)
SEE
NOTE 6
From drawing B340388 Rv 2
SEE
NOTE 8
FURNACE
B/C
B/C
TO 115 V 1 PH.,
60 HZ., POWER
SUPPLY PER
LOCAL CODES
HUM SEE
NOTE 5
EAC SEE
NOTE 5
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)
TWIN
TWIN
R1
R1
TWINNING CONNECTION DIAGRAM
FOR TWINNING 1 STAGE FURNACES WITH
SINGLE WIRE TWINNING FEATURE
1 STAGE HEATING ONLY THERMOSTAT
1 STAGE HEAT
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.
SEE NOTE 4
SEE NOTE 3
ISOLATION RELAY
(FIELD SUPPLIED)
SEE NOTE 4
ISOLATION RELAY
SEE NOTE 4
B/C
B/C
B/C
From Dwg. 21B341422 Rev. 3
28 18-CD33D1-4
Page 29
Installer’s Guide
TWIN
TWIN
R1
R1
TWINNING CONNECTION DIAGRAM
FOR TWINNING 1 STAGE FURNACES WITH
SINGLE WIRE TWINNING FEATURE
1 STAGE HEAT / 1 STAGE COOL THERMOSTAT
1 STAGE
HEATING / COOLING
THERMOSTATFURNACE NO. 1
FURNACE NO. 2
BLOWER OPERATION OF
UNIT NO. 2 IS SYNCRONIZED
WITH UNIT NO. 1 VIA SIGNALS
FROM TWIN CONNECTION.
SEE NOTE 4
SEE NOTE 5
ISOLATION RELAY
(FIELD SUPPLIED)
SEE NOTE 4
ISOLATION RELAY
SEE NOTE 4
OUTDOOR UNIT
(NO TRANSFORMER)
OUTDOOR UNIT
(WITH TRANSFORMER)
RC
ISOLATION RELAY
(FIELD SUPPLIED)
SEE NOTE 3
B/C
B/C
B/C
From Dwg. 21B341423 Rev. 2
GAS PIPING
The upflow/ horizontal furnace is shipped standard for
left side installation of gas piping. A knockout is provided
on the right side for an alternate gas piping arrangement.
See Figure 37.
The installation of piping shall be in accordance with piping codes and the regulations of the local gas company.
Pipe joint compound must be resistant to the chemical reaction with liquefied petroleum gases.
Refer to piping Table 10, for delivery sizes. Connect gas
supply to the unit, using a ground joint union and a manual shut-off valve as shown in Figures 37-39.
National codes require a condensation drip leg to be installed ahead of the controls as shown in Figures 37-39.
The furnace and its individual shut-off valve must be disconnected from the gas supply piping system during any
pressure testing of that system at test pressures in excess of 1/2 psig (3.5 kPa).
The furnace must be isolated from the gas supply piping
by closing its individual manual shut-off valve during any
pressure testing of the gas supply piping system at test
pressures equal to or less than 1/2 psig (3.5 kPa).
NOTE:
Maximum pressure to the gas valve for natural gas is
13.8" W.C. Minimum pressure is 5.0" W.C. Maximum
pressure to the gas valve for propane is 13.8" W.C.
Minimum pressure is 11.0" W.C.
All gas fittings must be checked for leaks using a
soapy solution before lighting the furnace. DO NOT
CHECK WITH AN OPEN FLAME!
ANSI Z223.1/ NFPA 54 or National Standard of Canada,
Natural Gas and Propane Installation Code, CSA B149.1.
18-CD33D1-4 29
Page 30
Installer’s Guide
*
MAIN MANUAL
SHUTOFF VALVE
GROUND
UNION
JOINT
DRIP
LEG
UPFLOW – LEFT HAND GAS PIPING
(
AUTOMATIC GAS VALVE
WITH MANUAL SHUTOFF
AUTOMATIC GAS VALVE
WITH MANUAL SHUTOFF
MAIN MANUAL
SHUTOFF VALVE
GROUND
UNION
JOINT
DRIP
LEG
UPFLOW – RIGHT HAND GAS PIPING
THE DOWNFLOW (VERTICAL) MAY BE INSTALLED LEFT OR RIGHT SIDE GAS PIPING
)
AUTOMATIC GAS VALVE WITH
MANUAL SHUTOFF
MAIN MANUAL
SHUTOFF VALVE
GROUND
UNION JOINT
HORIZONTAL FURNACE GAS PIPING MAY BE FROM EITHER SIDE (UPFLOW SHOWN)
30 18-CD33D1-4
DRIP
LEG
MAIN MANUAL
SHUTOFF VALVE
AUTOMATIC GAS VALVE
WITH MANUAL SHUTOFF
GROUND UNION JOINT
DRIP
LEG
Page 31
▲
CAUTION
!
Use a backup wrench on the gas valve when installing gas piping to prevent damage to the gas valve and
manifold assembly.
1. Make sure all gas appliances are off except the furnace.
2. Clock the gas meter with the furnace operating (determine the dial rating of the meter) for one revolution.
3. Match the “Sec” column in the gas flow (in cfh) Table
13 with the time clocked.
4. Read the “Flow” column opposite the number of seconds clocked.
5. Use the following factors if necessary:
For 1 Cu. Ft. Dial Gas Flow CFH =
Chart Flow Reading ÷2
For 1/2 Cu Ft. Dial Gas Flow CFH =
Chart Flow Reading ÷4
For 5 Cu. Ft. Dial Gas Flow CFH =
10X Chart Flow Reading ÷4
Installer’s Guide
6. Multiply the final figure by the heating value of the
gas obtained from the utility company and compare
to the nameplate rating. This must not exceed the
nameplate rating.
Gas Valve Adjustment
Changes can be made by adjusting the manifold pres-
sure (See Table 12), or changing orifices (orifice
change may not always be required). To adjust the
manifold pressure:
1. Turn off all electrical power to the system.
2. Attach a manifold pressure gauge with flexible tub-
ing to the outlet pressure boss marked “OUT P” on
White-Rodgers gas valve model 36G or 36J. See
Figure 54 for White-Rodgers gas valve model 36J.
See Figure 53 for White-Rodgers gas valve model
36G.
3. Loosen (Do Not remove) the pressure tap test set
screw one turn with 3/32" hex wrench.
a. The pressure tap adjustment kit (KIT07611) con-
tains a 3/32" hex wrence, a 5/16" hose and a connector and can be ordered through Global Parts.
4. Turn on system power and energize valve.
5. Adjust gas heat by removing the adjustment regula-
tor cover screw.
a. To increase outlet pressure, turn the regulator
adjust screw clockwise.
b. To decrease outlet pressure, turn the regulator
adjust screw counterclockwise.
c. Adjust regulator until pressure shown on mano-
meter matches the pressure specified in Table 12.
1. The input of no more than nameplate rating and
no less than 93% of the nameplate rating, unless
the unit is derated for high altitude.
d. Replace and tighten the regulator cover screw
securely.
6. Cycle the valve several times to verify regulator setting.
a. Repeat steps 5-6 if needed.
7. Turn off all electrical power to the system.
8. Remove the manometer and flexible tubing and
tighten the pressure tap screw.
9. Using a leak detection solution or soap suds, check
for leaks at the pressure outlet boss and pressure tap
test screw.
10. Turn on system power and check operation of the
unit.
18-CD33D1-4 31
Page 32
Installer’s Guide
▲
CAUTION
!
▲
CAUTION
!
Q
Replace and/ or tighten all plugs removed or loosened
when adjusting gas pressure. Leak check the fittings
before placing the furnace into regular service.
Failure to follow this warning could result in fire, explosion, 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 tubing, 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 51.
Replace manifold pressure tap threaded plug and leak
check after checking/ adjusting manifold gas pressure.
Table 11 lists the main burner orifices used with the furnace. If a change of orifices is required to correct the furnace input rating refer to Table 14.
TABLE 12
FINAL MANIFOLD PRESSURE SETTINGS
FUELPRESSURE
NATURAL GAS3.5" W.C.
LP GAS11.0" W.C.
HIGH ALTITUDE DERATE
Input ratings (BTUH) of these furnaces are based on sea
level operation and should not be changed at elevations
up to 2,000 ft.
If the installation is 2,000 ft. or above, the furnace input
rate (BTUH) shall be reduced 4% for each 1,000 ft. above
sea level. The furnace input rate shall be checked by
clocking the gas flow rate (CFH) and multiplying by the
heating value obtained from the local utility supplier for
the gas being delivered at the installed altitude.
Input rate changes can be made by adjusting the manifold pressure (min 3.0 - max 3.7 in. W.C. - Natural Gas) or
changing orifices (orifice change may not always be required). If the desired input rate can not be achieved with
a change in manifold pressure, then the orifices must be
changed. LP installations will require an orifice change.
Installation of this furnace at altitudes above 2,000 ft.
(610m) shall be in accordance with local codes, or in the
absence of local codes, the National Fuel Gas Code,
INSERT THE TOP
FLANGE OF THE
FRONT COVER UNDER THE LIP INSIDE
THE BOX
ALL SIDE FLANGES MUST BE OUTSIDE OF THE BOX
ROTATE THE FRONT
COVER INWARD
MAKING SURE THAT
ALL SIDE FLANGES
ARE OUTSIDE OF
THE BOX.
Installation of this furnace at altitudes above 2,000 ft.
(610m) shall be made in accordance with the listed high
Altitude Conversion Kit available with this furnace.
IMPORTANT:
Re-install the propane orifices to the same depth as
the orifices supplied with the equipment.
See Table 15 for help in selecting orifices if orifice change
is required. Furnace input rate and temperature rise
should be checked again after changing orifices to confirm the proper rate for the altitude.
Installations above 4,000 feet may require a pressure
switch change. If required, use the BAYHALT*** Kit (High
Altitude Accessory Kit) listed in PRODUCT DATA.
CARBON MONOXIDE POISONING HAZARD
Failure to follow the installation instructions for the
venting system being placed into operation could result in carbon monoxide poisoning or death.
START UP AND ADJUSTMENT
PRELIMINARY INSPECTIONS
With gas and electrical power “OFF”
1. Duct connections are properly sealed
2. Filters are in place
3. Venting is properly assembled
4. Blower door is in place
Flip the switch on main gas valve within the unit to the
“OFF” position. Turn the external gas valve to “ON”. Purge
the air from the gas lines. After purging, Check all gas
connections for leaks with a soapy solution — DO NOT CHECK WITH AN OPEN FLAME. Allow 5 minutes for
any gas that might have escaped to dissipate. LP Gas
being heavier than air may require forced ventilation.
Flip the switch on the gas valve in the unit to the “ON”
position.
E
REINSTALLATION OF THE BURNER BOX COVER
Figure 52 shows the correct way to reinstall the burner
box cover if adjustment or replacement of the flame sensor, hot surface igniter, or main burner orifices have required removal of the cover.
18-CD33D1-4 33
White-Rodgers 36G gas valve
Page 34
Installer’s Guide
▲
WARNING
!
▲
CAUTION
!
R
Outlet Pressure Boss
Inlet Pressure
Boss (opt.)
On/Off Switch
White-Rodgers 36J gas valve
LIGHTING INSTRUCTIONS
SAFETY HAZARD
DO NOT attempt to manually light the burner.
Failure to follow this warning could result in property
damage, personal injury or death.
Lighting instructions appear on each unit. Each installation must be checked out at the time of initial start up
to insure proper operation of all components. Check out
should include putting the unit through one complete cycle as outlined below.
Turn on the main electrical supply and set the thermostat
above the indicated temperature. The ignitor will automatically heat, then the gas valve is energized to permit
the flow of gas to the burners. After ignition and flame is
established, the flame control module monitors the flame
and supplies power to the gas valve until the thermostat
is satisfied.
To shut off.
For complete shut-down: Flip the switch on the main gas
valve to the “OFF” position, (See Figure 53 & 54). Disconnect the electrical supply to the unit.
If this is done during the cold weather months, provisions must be taken to prevent freeze-up of all water
pipes and water receptacles.
Failure to follow this warning could result in property
damage.
Whenever your house is to be vacant, arrange to
have someone inspect your house for proper temperature. This is very important during freezing weather.
If for any reason your furnace should fail to operate
damage could result, such as frozen water pipes.
Regulator
Adjustment
SEQUENCE OF OPERATION
Thermostat call for heat
R and W thermostat contacts close signaling the control module to run its self-check routine. After the control
module has verified that the pressure switch contacts are
open and the limit switch(es) contacts are closed, the
draft blower will be energized.
As the induced draft blower comes up to speed, the pressure switch contacts will close and the ignitor warm up
period will begin. The ignitor will heat for approximately
20 seconds, then the gas valve is energized to permit gas
flow to the burners. The flame sensor confirms that ignition has been achieved.
After the flame sensor confirms within a 4 second trial
period that ignition has been achieved, the delay to fan
ON period begins timing. After approximately 45 seconds
the indoor blower motor will be energized and continue to
run during the heating cycle.
When the thermostat is satisfied, R and W thermostat
contacts open, the gas valve will close, the flames will
extinguish, and the induced draft blower will be de-energized. The indoor blower motor will continue to run for
the fan off period (Field selectable at 60, 100, 140 or 180
seconds), then be de-energized by the control module.
CONTROL AND SAFETY SWITCH ADJUSTMENTS
LIMIT SWITCH CHECK OUT
The limit switch is a safety device designed to close the
gas valve should the furnace become overheated. Since
proper operation of this switch is important to the safety
of the unit, it must be checked out on initial start up by the installer.
To check for proper operation of the limit switches, set
the thermostat to a temperature higher than the indicated
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 furnace reaches
the maximum outlet temperature as shown on the rating
plate, the burners must shut off. If they do not shut off after a reason able time and overheating is evident, a faulty
limit switch is probable and the limit switch must be replaced. After checking the operation of the limit control,
be sure to remove the paper or cardboard from the return
air inlet. Refer to Service Facts for additional instructions.
NOTE TO INSTALLER
Review the following warnings with the owner. Review
contents of USER’S INFORMATION MANUAL with the
owner.
34 18-CD33D1-4
Page 35
Installer’s Guide
▲
WARNING
!
▲
WARNING
!
AIRFLOW ADJUSTMENT
Check inlet and outlet air temperatures to make sure
they are within the ranges specified on the furnace rating nameplate. If the airflow needs to be increased or
decreased, see the wiring diagram for information on
changing the speed of the blower motor.
Disconnect power to the unit before removing the
blower door.
Failure to follow this warning could result in property
damage, personal injury or death.
This unit is equipped with a blower door switch which cuts
power to the blower and gas valve causing shutdown
when the door is removed. Operation with the door removed or ajar can permit the escape of dangerous fumes.
All panels must be securely closed at all times for safe operation of the furnace.
INDOOR BLOWER TIMING
Heating: The integrated furnace control module controls
the indoor blower. The blower start is fixed at 45 seconds
after ignition. The FAN-OFF period is field selectable by
dip switches at 60, 100, 140, or 180 seconds. The factory
setting is 100 seconds (See wiring diagram).
Cooling: The fan delay off period is factory set at 0 seconds. The option for 80 second delay off is field selectable (See wiring diagram).
ROOM AIR THERMOSTAT
HEAT ANTICIPATOR ADJUSTMENT
Set the thermostat heat anticipator according to the current flow measured, or the settings found in the notes
on the furnace wiring diagram (found in the SERVICE
FACTS or inside the furnace casing).
INSTRUCTIONS TO THE OWNERS
EXPLOSION HAZARD
In the event that electrical, fuel, or mechanical failures occur, shut off the gas supply off at the manual
gas valve, located on the supply gas piping coming into the furnace, before turning off the electrical
power to the furnace. Contact the service agency
designated by your dealer.
BURNER BOX TEMPERATURE LIMIT DEVICE
All models are equipped with a manual reset temperature
limit located on the burner box. In case of excessive temperature, the limit will open and cause the circuit to open
which shuts off all flow of gas.
CONDITIONS AFFECTING FURNACE OPERATION
1. EXCESSIVE COMBUSTION PRESSURE (WIND IN
EXCESS OF 40 M.P.H.) VENT OR FLUE BLOCKAGE
If pressure against induced draft blower outlet be-
comes excessive, the pressure switch will open and
shut off the gas valve until acceptable combustion
pressure is again available.
2. LOSS OF FLAME
If loss of flame occurs during a heating cycle, or
flame is not present at the sensor, the flame control
module will close the gas valve. The flame control
module will then recycle the ignition sequence, then
if ignition is not achieved, it will shut off the gas valve
and lock out the system.
3. POWER FAILURE
If there is a power failure during a heating cycle, the
system will restart the ignition sequence automatically when power is restored if the thermostat still calls
for heat.
4. GAS SUPPLY FAILURE
If loss of flame occurs during a heating cycle, the
system integrated control module will recycle the ignition sequence, then if ignition is not achieved, the
integrated control module will shut off the gas valve
and lock out the system.
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 receive a signal warning of the
accumulation of condensate in the heat exchanger
assembly. The pressure switch contacts will open and
remain open, not allowing unit operation. The unit
will not operate until 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 thermostat. The system
will not reset unless the procedure off-on-off-on is
completed within 30 seconds.
18-CD33D1-4 35
Page 36
8. RESET AFTER BURNER BOX LIMIT SHUTDOWN
If the furnace shuts down, one thing that can be
checked is the burner box temperature limit switch.
It is located on the bottom of the burner box. The
vent and combustion air inlet terminations should be
checked for blockage. If blockage exists, clear the
problem and then the reset button may be depressed.
If there is no blockage of the terminations, the
limit switch must be reset by a qualified servicer.
Carbon monoxide, fire or smoke can cause serious bodily
injury, death, and/ or property damage.
A variety of potential sources of carbon monoxide can be
found in a building or dwelling such as gas-fired clothes
dryers, gas cooking stoves, water heaters, furnaces and
fireplaces. The U.S. Consumer Product Safety Commission recommends that users of gas-burning appliances install carbon monoxide detectors as well as fire
and smoke detectors per the manufacturers installation
instructions to help alert dwelling occupants of the presence of fire, smoke or unsafe levels of carbon monoxide.
These devises should be listed by Underwriters Laboratories, Inc. Standards for Single and Multiple Station Carbon Monoxide Alarms, UL 2034 or CSA International
Standard, Residential Carbon Monoxide Alarming Devic-es, CSA 6.19.
NOTE:
The manufacturer of your furnace does not test any detectors and makes no representations regarding any
brand or type of detector.
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:
3 Flashes ---
a) Venting problem
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
9 Flashes ---
Check Ignitor Circuit and Line "N" to 24VAC "Common" voltage (< 2 volts)
[possible grounding problem]
Trane
6200 Troup Highway
Tyler, TX 75707
For more information contact
your local dealer (distributor)
Literature Order Number 18-CD33D1-4
File Number 18-CD33D1-4
Supersedes 18-CD33D1-3
Date 01/13
The manufacturer has a policy of continuous product and product data improvement and reserves the right to
change design and specifications without notice.
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