USER’S INFORMATION MANUAL
MODELS 330AAV UPFLOW and
331AAV DOWNFLOW/
HORIZONTAL GAS FURNACE
NOTE TO INSTALLER:
This manual must be left with the equipment user.
WARNING: If the information in this manual
is not followed exactly, a fire or explosion may result
causing property damage, personal injury or loss
of life.
— Do not store or use gasoline or other flammable
vapors and liquids in the vicinity of this or any
other appliance.
— WHAT TO DO IF YOU SMELL GAS:
— Do not try to light any appliance.
— Do not touch any electrical switch; do not use
any phone in your building.
• Immediately call your gas supplier from a
neighbor’s phone. Follow the gas supplier’s
instructions.
• If you cannot reach your gas supplier, call the
fire department.
— Installation and service must be performed by a
qualified installer, service agency or the gas
supplier.
Do not use this furnace if any part has been under water.
Immediately call a qualified service technician to inspect
the furnace and to replace any part of the control system
and gas control which has been under water.
WELCOME TO
GENERATION OF
COMFORT
Congratulations! Your new, high
efficiency gas furnace is a sound
investment which will reward you
and your family with years of warm
memories winter after winter.
Not only is your new furnace energy
efficient, it is also extremely reliable
and supplies superior home comfort.
Spend just a few minutes with this
booklet to learn about the operation
of your new furnace and the small
amount of maintenance it takes to
keep it operating at peak efficiency.
Years went into the development of
your new furnace. Take a little time
now to assure its most efficient
operation for years to come.
1
MODEL 330AAV Upflow
Furnace
UPFLOW FURNACE
COMPONENTS
1
Relief Box
2
Gas Valve Control Knob or Electric Switch (On/Off)
3
2-Stage Gas Valve
4
Manual Reset Flame Rollout Switch (2)
5
Gas Burner
6
Flame Sensor
7
Hot Surface Ignitor
8
Rating Plate
9
Status LED Light
10
Blower and Blower Motor
11
Draft Safeguard Tube and Switch
12
Gas Manifold
13
Blower Door Safety Switch
14
Filter Retainer
15
Air Filter
2
MODEL 331AAV
Downflow/Horizontal
Furnace
1
11
2
3
4
5
12
6
7
8
9
10
13
14
15
3
2
DOWNFLOW/HORIZONTAL
FURNACE COMPONENTS
1
1
Manual Reset Auxiliary Limit Switch
2
Blower and Blower Motor
3
Relief Box
4
Gas Valve Control Knob or Electric Switch (On/Off)
5
2-Stage Gas Valve
6
Gas Burner
7
Rating Plate
8
Status LED Light
9
Blower Door Safety Switch
10
Draft Safeguard Tube and Switch
11
Manual Reset Flame Rollout Switch (2)
12
Gas Manifold
13
Hot Surface Ignitor
14
Flame Sensor
2
8
3
9
10
4
5
11
6
12
7
13
14
4
IMPORTANT FACTS
Your furnace must have adequate
airflow for efficient combustion and
safe ventilation. Do not enclose it in
an airtight room or “seal’’ it behind
solid doors. To minimize the possibility of serious personal injury, fire,
damage to your furnace, or improper
operation, carefully follow these
safety rules:
• Keep the area around your furnace
free of combustible materials, gasoline,
and other flammable liquids and
vapors.
rine. These compounds are present
in many products around the home,
such as water softener salts, laundry
bleaches, detergents, adhesives,
paints, varnishes, paint strippers,
waxes, and plastics.
Make sure the combustion air for
your furnace does not contain any of
these compounds. During remodeling
be sure the combustion air is fresh
and uncontaminated. If air with vapors
of these compounds is burned in your
furnace, the heat exchangers and
metal vent system may deteriorate.
• A furnace installed in an attic or
other insulated space must be kept
free and clear of insulating material.
Examine the furnace area when installing the furnace or adding more
insulation. Some materials may be
combustible.
5
• Do not cover the furnace, store
trash or debris near it, or in any
way block the flow of fresh air to
the unit.
• Combustion air must be clean and
uncontaminated with chlorine or fluo-
NOTE: Do not use this furnace if any
part has been under water. Immediately call a qualified service technician
to inspect the furnace and to replace
any part of the control system, electrical components and any gas control
which has been under water.
NOTE: The qualified installer or
agency must use only factoryauthorized replacement parts, kits,
and accessories when servicing this
product.
3
This furnace contains safety devices
which must be manually reset. If the
furnace is left unattended for an extended period of time, have it
checked periodically for proper operation. This precaution will prevent
problems associated with no heat, such
as frozen water pipes, etc. See
“Before You Request a Service Call’’
section in this manual.
SAFETY
CONSIDERATIONS
Installing and servicing heating
equipment can be hazardous due
to gas and electrical components.Only
trained and qualified personnel
should install, repair, or service heating
equipment.
Untrained personnel can perform
basic maintenance functions such
as cleaning and replacing air filters.
All other operations must be performed by trained service personnel.
Observe safety precautions in this
manual, on tags and labels attached
to the furnace, and other safety precautions that may apply.
Recognize safety information. This is
the safety-alert symbol ! . When
you see this symbol on the furnace
and in instructions or manuals, be
alert to the potential for personal
injury.
Understand the signal words DANGER, WARNING, and CAUTION.
These words are used with the safetyalert symbol. DANGER identifies the
most serious hazards which will
result in severe personal injury or
death. WARNING signifies hazards
which could result in personal injury
or death. CAUTION is used to identify
unsafe practices which would result
in minor personal injury or product
and property damage.
dures on the furnace or see “Shutting
Down your Furnace” section in this
manual, then call your dealer as soon
as possible.
• Check Air Filter: Before attempting to start your furnace, be sure
the furnace filter is clean and in place.
(See the maintenance section of
this manual.) Then proceed as
follows:
®
10
STARTING YOUR
FURNACE
Instead of a continuously burning pilot
flame, your furnace uses an automatic
hot surface ignition system to light
the burners each time the thermostat
turns your furnace on. Follow these
important safeguards:
• Never attempt to manually light the
burners with a match or other source
of flame.
7
STEPS FOR
STARTING YOUR
FURNACE
1. Set your room thermostat to
the lowest temperature setting.
(See Fig. 7.)
2. Close the external manual gas
valve. (See Fig. 8.)
3. Turn off electrical supply to the
furnace. (See Fig. 9.)
CL
SE
O
6
• Read and follow the operating
instructions on the furnace, especially
the item that reads as follows:
“Wait 5 minutes to clear out any gas.
Then smell for gas, including near
the floor. If you smell gas, STOP!
Follow “B’’ in the above safety information on this label. If you don’t
smell gas, go to the next step.”
! WARNING
8
Should overheating occur or
the gas valves fail to shut off
the gas supply, turn off the
manual gas valve to the furnace BEFORE turning off the
electrical supply. (See Fig. 8.)
A failure to follow this warning
could result in a fire or explosion, and personal injury or
death.
• If a suspected malfunction occurs
with your gas control system, such as
the burners do not light when they
should, refer to the shutdown proce-
9
4
11
4. Remove the furnace access
door(s).
a. Downflow/Horizontal—Remove blower door after removing 2 screws first, then
remove the control door.
(See Fig. 10.)
b. Upflow—Remove control
door. (See Fig. 11.)
5. The gas valve will have EITHER
a control knob or control switch to
turn off and on. Turn the control
knob or switch on the gas valve
to the OFF position and wait
5 minutes. (See Fig. 12 or 13.)
6. After waiting 5 minutes, turn
the control knob or switch on the
gas valve to the ON position.
(See Fig. 14 or 15.)
7. Replace the access door(s). See
Fig. 16 for upflow and Fig. 17
for downflow. Replace control
door first on downflow furnaces.
Replace blower door and secure
with 2 screws.
8. Turn on electrical supply to the
furnace. (See Fig. 18.)
9. Open the external manual gas
valve. (See Fig. 19.)
10. Set the room thermostat to a temperature slightly above the room
temperature. This will automatically signal the furnace to start.
The inducer motor will start, and
the hot surface ignitor will energize. When hot, the ignitor will
have an orange glow.
11. After 15 to 70 sec, the gas valve
permits gas to flow to the main
burners where it is ignited. Hot
flames begin to warm the
furnace’s heat exchanger. After
a time delay of approximately
45 sec, the furnace blower is
switched on.
16
OFF
12
1
3
P
2
C
ON
17
ON
OFF
M
O
F
F
OR
13
18
ON
OP
EN
14
C
1
3
2
ON
19
ON
P
OFF
M
O
F
F
NOTE: If the main burners fail to
OR
ignite, the furnace control system will
go through 3 more ignition cycles. If
burners still fail to ignite, the system
will lockout. (Under some circumstances the furnace may reset from
lockout and attempt to ignite if a call
for heat still exists.) If lockout occurs
or the blower does not come on, refer
15
5
to the shutdown procedures on the
furnace or see “Shutting Down Your
Furnace” section in this manual, and
call your dealer for service.
12. Set your thermostat to the tem-perature that satisfies your com-fort
requirements.
SUGGESTION: Setting the thermostat back a few degrees and
compensating for the difference
with warmer clothing can make a
big difference in your fuel consumption. The few degrees at the
top of your thermostat “comfort
level’’ are the most costly degrees
to obtain.
When the room temperature drops
below the temperature selected on the
thermostat, the furnace will switch on
automatically. When the room temperature reaches the setting selected on
the thermostat, the furnace will automatically switch off.
Some thermostats have a “FAN’’
switch with 2 selections, AUTO and
ON. When thermostat is set to AUTO,
the furnace blower cycles on and off,
controlled by the thermostat. In ON
position, the furnace blower runs
continuously except for a 77-sec delay
at the “call for heat.’’ This keeps the
temperature level in your home more
evenly balanced. It also continuously
filters the indoor air. When FAN
switch is moved from ON to AUTO, the
furnace blower will continue running
for 90 sec before stopping.
PERFORMING
ROUTINE
MAINTENANCE
7. If the furnace is being shut down
because of a malfunction, call
your dealer as soon as possible.
With proper maintenance and care,
your furnace will operate economically and dependably. Basic
maintenance, which can easily be
accomplished by someone who
follows the directions, is found on
this and the following pages. However,
before beginning maintenance, follow
these safety precautions:
®
! WARNING
20
Turn off electrical power supply to your furnace before removing the access doors to
service or perform maintenance. A failure to follow this
warning could result in personal injury or death.
! CAUTION
Although special care has
been taken to minimize sharp
edges, be extremely careful
when handling parts or reaching into the furnace.
21
FILTERING OUT
TROUBLE
A dirty filter will cause excessive
stress on the furnace blower motor
and can cause it to overheat and automatically shut down. The furnace
filter should be checked every 3 or 4
weeks and cleaned if necessary.
If installed with factory specified disposable media filter, check or replace
filter before each heating and cooling
season. Replace disposable media filter
at least once a year.
OFF
SHUTTING DOWN
YOUR FURNACE
22
P
C
OFF
M
O
F
F
1
3
2
ON
23
6
OR
ON
Should you ever suspect a malfunction
in your furnace, you will need to turn
the furnace off. The following procedures must be followed:
1. Set your room thermostat to the
lowest temperature setting.
(See Fig. 20.)
2. Close the manual gas valve that is
located outside of the furnace cabinet. (See Fig. 8.)
3. Turn off electrical power to your
furnace. (See Fig. 21.)
4. Remove the control access door on
your furnace. (See Fig. 10 or 11.)
On upflow furnaces, removing the
blower access door is not
required.
5. Turn the control knob or electric
switch on the gas valve to the OFF
position. (See Fig. 22 or 23.)
6. Replace the control access door.
(See Fig. 16 or 17.)
If your furnace filter needs replacing,
be sure to use the same size and type
of filter that was originally supplied.
Use the Furnace Filter Table and
match your furnace size with the
proper filter size.
! CAUTION
Never operate your furnace
without a filter in place. Doing
so may damage the furnace
blower motor. An accumulation of dust and lint on internal
parts of your furnace can
cause a loss of efficiency.
The air filter for upflow furnaces is normally located in the blower compartment (See Fig. 2) or in the factorysupplier filter cabinet attached to the
side or bottom of the blower cabinet.
Filters for the downflow furnaces are
normally located in the return-air plenum above the blower. If air filter has
been installed in another location, contact your dealer for instructions. To inspect, clean, and/or replace the air
filter(s), follow these steps:
• UPFLOW
FURNACES ONLY—
1. Turn off electrical supply to furnace. (See Fig. 21)
2. Remove door/access panel
• AIR FILTER(S) LOCATED IN
BLOWER COMPARTMENT
Remove control and blower access
doors. (See Fig. 11)
• AIR FILTER LOCATED IN FILTER CABINET
Remove filter cabinet door (See
Fig. 30 and 31)
NOTE: It will be necessary to
remove 1 thumbscrew
3. Remove air filter from furnace.
• AIR FILTER LOCATED IN
BLOWER COMPARTMENT:
a. Slide filter retainer sideways
until it is free of latch. (See Fig. 24)
b. Gently remove air filter and
carefully turn the dirty side up (if
dirty) to avoid spilling dirt from
the filter. (see Fig. 25)
• AIR FILTER LOCATED IN FILTER CABINET:
a. Slide air filter out of furnace.
Keep dirty side up (if dirty) to avoid
spilling dirt. (see Fig. 31 and 32)
4. Inspect the filter. If torn, replace it.
NOTE: If washable filter that was
shipped with the furnace has been
replaced by:
a. Factory specified disposable
media filter – Do not clean. If dirty,
replace only with media filter having the same part number and size.
Install with airflow direction arrow
pointing towards blower.
b. Electronic air cleaner (EAC) –
Refer to EAC owner’s Manual for
maintenance information.
5. Wash filter (if dirty) in sink, bathtub, or outside with a garden hose.
Always use cold tap water. A mild
liquid detergent may be used if
necessary. Spray water through filter in the opposite direction of airflow. Allow filter to dry.
6. Reinstall clean air filter
7. Reinstall filter retainer (for blower
compartment locations only)
8. Replace control and blower doors
(See Fig. 26 and 16) or filter cabinet door (fig. 32 and 33)
9. Turn on electrical supply to furnace (see Fig 18).
NOTE: For upflow models only—Two
filters may be required in some models if side return ducts are used. The
procedure listed above may be used to
remove side filters.
24
26
• DOWNFLOW/HORIZONTAL
FURNACES ONLY—
Two filters are located in the return-air
plenum above the blower (above lineof-sight) resting in the V-shaped channel on top of the furnace. (See Fig. 27.)
1. Turn off electrical supply to
furnace. (See Fig. 21.)
2. Remove 2 screws from blower
access door and remove door.
3. Remove the left-side filter by tipping the filter toward the center
and raising it from the V-shaped
channel in which it rests. (See
Fig. 27 and 28.)
4. Lower filter down next to the
blower and remove from furnace.
5. To remove the right-side filter,
lift from V-shaped channel and
remove through left-side the
same way as left-side filter.
6. Inspect the filter. If torn, replace
the filter.
7. Wash the filter (if dirty) in a sink,
bathtub, or outside with a garden
hose. Always use cold tap water. A
mild liquid detergent may be
used if necessary. Spray water
through the filter in opposite
direction of airflow through the
cross-mesh binding (when
present) side. Allow filter
to dry.
8. Reinstall clean filters.
25’
27
7
28
9. Replace blower access door and
secure with 2 screws. Turn on
electrical supply to the furnace.
(See Fig. 18.)
UPFLOW FURNACE
AIR FILTER TABLE (IN.)
AIR FILTER LOCATED IN BLOWER
COMPARTMENT
FURFILTER SIZE
NACE
CASING
Side
Bottom FILTER
WIDTH
Return
Return TYPE
14-3/16
(1) 16 x 25 x 1* (1) 14 x 25 x 1 Cleanable
17-1/2
(1) 16 x 25 x 1* (1) 16 x 25 x 1* Cleanable
21
(1) 16 x 25 x 1 (1) 20 x 25 x 1* Cleanable
24-1/2
(1 or 2) 16 x 25 x 1 (1) 24 x 25 x 1* Cleanable
AIR FILTER LOCATED IN
FILTER CABINET
FILTER
CABINET
FILTER
FILTER
HEIGHT (IN)
SIZE (IN)
TYPE
16
(1) 16 x 25 x 1*
or (1) 16 x 25 x 4-5/16
Cleanable
Disposable
20
(1) 20 x 25 x 1*
or (1) 20 x 25 x 4-5/16
Cleanable
Disposable
24
(1) 24 x 25 x 1*
or (1) 24 x 25 x 4-5/16
Cleanable
Disposable
the main burners can cause faulty firing. This “delayed ignition’’ is characterized by an alarmingly loud sound. If
your furnace makes a loud noise when
the main burners are ignited, shut
down the furnace and call your
servicing dealer.
Use your flashlight and follow these
steps for inspecting the combustion
area and vent system of your furnace:
1. Turn off the electrical supply to
furnace and remove the access
doors. (See Fig. 9, and 10 or 11.)
2. Carefully inspect the gas burner
for dirt, rust, or scale. (See Fig.
29.) Inspect the relief box, flue
connection area, and the vent pipe
for rust.
31
NOTE: If dirt, rust, soot, or scale accu-
mulations are found, call your servicing dealer. DO NOT OPERATE THE
FURNACE.
3. Inspect the vent pipe for a sag,
holes, or a disconnection. A horizontal vent pipe must slope
upward. If rusty joints or seams,
or signs of water leakages are
found, call your dealer for service.
DOWNFLOW
FURNACE FILTER TABLE (IN.)
FURNACE
CASING
WIDTH
FILTER
SIZE
FILTER
TYPE
14-3/16
(2) 16 x 20 x 1*
Cleanable
17-1/2
(2) 16 x 20 x 1*
Cleanable
21
(2) 16 x 20 x 1*
Cleanable
32
24-1/2
(2) 16 x 20 x 1*
Cleanable
* Filter provided with the furnace. Filters may be field
modified by cutting filter material and support rods (3)
in filters. Alternate sizes and additional filters may be
ordered from your dealer.
29
! CAUTION
Use care when cutting support
rods in filters to protect
against flying pieces and
sharp rod ends. Wear safety
glasses, gloves, and appropriate protective clothing. Failure
to follow this caution could result in personal injury.
33
COMBUSTION AREA
AND VENT SYSTEM
30
Inspect the combustion area and vent
system before each heating season.
An accumulation of dirt, soot, or rust
can mean a loss of efficiency and
improper performance. Buildups on
34
8
• Is your thermostat set above room
temperature? Is the switch in the
HEAT position?
• Is the electrical power supply switch
on? Is the blower access door firmly in
place? Are any fuses blown? (There is a
fuse on the furnace control.) Has a circuit breaker tripped?
• Is the manual shutoff valve in the gas
supply pipe leading to the furnace
open? Does the lever point in the same
direction that the pipe runs (open)? Or is
it at a right angle to the pipe (closed)?
35
! WARNING
If holes are found or if the vent
pipe is obstructed or is not
connected, toxic fumes can escape into your home. DO NOT
OPERATE YOUR FURNACE.
Call your dealer for service.
A failure to follow this warning
could result in personal injury
or death.
4. Replace the access doors and
restore electrical supply to the
furnace. Be sure bottom door
flange is inside of the furnace casing. (See Fig. 16 and 17.)
5. Start the furnace and observe its
operation. If possible, watch the
burner flames. Are they burning
bright blue? If not or if you suspect some other malfunction, call
your servicing dealer.
NOTE: Before proceeding with the
next checks, turn off the electrical
power supply to the furnace. Remove
access doors.
• Is the control knob or switch on the
gas valve turned to the ON position? If
this or the preceding check shows
an interruption in the gas supply,
make sure the gas has not been shut
off for safety reasons. If nothing else
seems to be wrong, follow the startup
procedures found on pages 4 and 5
of this booklet.
• If for some reason the vent is
blocked, the draft safeguard switch will
shut off the furnace. Reset the switch
by pushing the button located on top
of the switch. See page 2 or 3 for switch
location.
If the switch trips a second time, turn
off the furnace and call for service.
• DOWNFLOW HORIZONTAL
ONLY—Check the manual reset auxiliary limit switch located on the blower
housing. If the blower motor fails, this
switch will shut off the furnace. Reset it
by pushing the button on the switch. If
it trips again, turn off the furnace and
call for service.
BEFORE YOU CALL FOR
SERVICE, CHECK FOR
SEVERAL EASILY SOLVED
PROBLEMS:
• Check the manual reset flame rollout switch(es) located near the burners. If the furnace has experienced a
high-temperature condition due to
inadequate combustion air, these
switches will shut off the furnace.
Reset the switch(es) by pushing the
button on the switch. If the switch trips
a second time, turn off the furnace and
call for service.
• Check for sufficient airflow. Check
the air filter for dirt. Check for blocked
return-air or supply-air grilles. Be sure
they are open and unobstructed. If this
isn’t the cause of the problem, call your
servicing dealer.
If your furnace isn’t operating at all,
check the following list for easily
solved problems:
• If your furnace still fails to operate,
call your servicing dealer for troubleshooting and repairs. Tell your dealer
the model and serial numbers for your
furnace. (You should have them
recorded on page 12 of this booklet.)
By knowing exactly which furnace you
have, the dealer may be able to offer
suggestions over the phone or save
BEFORE YOU REQUEST
A “SERVICE CALL’’
9
valuable time through knowledgeable
preparation for the service call.
• Your furnace control board has an
LED fault code light that indicates
the furnace status. The LED will flash
short and long flashes. Look through the
sight glass on the furnace door and
determine the code (number
of short and long flashes). Give the
code and furnace model number to
your dealer when you call. By knowing
exactly which furnace you have and
the LED code being displayed, your
dealer can save valuable time through
knowledgeable preparation for the service call.
REGULAR DEALER
MAINTENANCE
In addition to the type of routine
maintenance you might be willing to
do, your furnace should be inspected
regularly by a properly trained service
technician. A semiannual inspection
(or annual inspection, at least) should
include the following:
1. Inspection of all flue product
passages including the burners,
heat exchanger, relief box, and
vent pipe.
2. Inspection of all combustion and
ventilation air passages and
openings.
3. Close check of all gas pipes leading to and inside of your furnace.
4. Inspection, cleaning, and lubrication (when required) of the
blower motor and wheel.
NOTE: Refer to the unit Service
Procedures for blower motor oiling
information. When required, the
motor must be oiled by a qualified
service technician.
5. Routine inspection and cleaning/
replacement of the air filter.
6. Inspection of all supply- and
return-air ducts for obstructions,
air leaks, and insulation. Any
problems found should be
resolved at this time.
7. Inspect the return-air duct connection(s) at the furnace to
ensure it is physically sound,
sealed to the furnace casing, and
terminates outside the space containing the furnace.
8. Inspection of furnace installation
for proper support and any obvious deterioration of the furnace.
The support must be sound and
without sags, gaps, cracks, etc.,
around the furnace base so as to
provide an air seal between the
support and furnace.
9. A check for loose connections
attaching individual components.
Inspection of all electrical wiring
and their connections.
10. Operational check of the furnace
itself to determine working condition. Repair or adjustment
should be made at this time.
10
Ask your servicing dealer for further
details about an economical service
contract that covers seasonal
inspections.
11
INSTALLATION DATA
SPLIT-SYSTEM
Date Installed
Product No.
Dealer Name
Model No.
Address
Serial No.
City
State
INDOOR COIL:
Zip
Product No.
Telephone
Model No.
FURNACE
Serial No.
Product No.
Model No.
Serial No.
© 2000 Bryant Heating & Cooling Systems, 7310 W. Morris St.
Indpls., IN 46231
12
PRINTED IN U.S.A.
Cancels OM04-29
OM04-37
Catalog No. 5333-016
10-00