Bryant 349HAV Series Guide

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USER’S INFORMATION MANUAL
MODEL 349HAV
HORIZONTAL GAS FURNACE
NOTE TO INSTALLER:
This manual must be left with the
equipment user.
a
— Do not store or use gasoline or other flam-
mable 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.
WARNING: If the information in this manual
is not followed exactly, a fire or explosion may
result causing property damage, personal in-
jury or loss of life.

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WELCOMETO A NEW
GENERATION OF COMFORT
Congratulations!Your new, 80%* efficient 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 one of
the most reliable. 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 effi-
ciency.Years went into the development of your new furnace.
Take a little time now to assure its most efficient operation for
years to come.
* The output capacity and any representations of efficiency for this furnace are
based on standard Department of Energy test procedures.
INSTALLATION DATA
Date Installed
Dealer Name
Address
City
State Zip
Telephone
FURNACE
Product No.
Model No.
Serial No.
SPLIT-SYSTEM
OUTDOOR UNIT:
Product No.
Model No.
Serial No.
INDOOR COIL:
Product No.
Model No.
Serial No.
1
MODEL 349HAV
HORIZONTAL FURNACE

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HORIZONTAL FURNACE COMPONENTS
Primary serpentine heat exchanger. Stretches fuel dollars
with the S-shaped heat flow design. Solid construction of
corrosion-resistant aluminized steel means reliability.
Burner assembly (inside). Operates with energy-saving
pilot, inshot burners, and hot surface igniter for safe,
dependable heating.
Gas valve—ignition module assembly. Safe, efficient.
Features 2 separate gas shutoff valves.
Heavy-duty blower. Circulates air, scrubbing the heat ex-
changers to transfer heat into the home.
Air filter, and wire filter retainer (optional).
Inducer motor. Pulls hot flue gases through the heat ex-
changers, maintaining negative pressure for added safety.
Vent outlet. Carries vent gases from the home.
Limit switch. Shuts furnace down in the event of an over-
heating condition.
Pressure switch. Ensures adequate flow of flue products
through furnace and out vent system.
Control center.
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2
3
4
5
6
7
8
9
10
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MODEL 349HAV
HORIZONTAL FURNACE
(Unit Shown In Horizontal Left Configuration)
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2
8
1
7
35
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6
9
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IMPORTANT FACTS
Your furnace musthaveadequate airflow
for efficient combustion and safe ventila-
tion.Donotenclose it in anairtightroom
or “seal” it behind solid doors.
3
To minimize the possibility of serious
personal injury, fire, damage to your fur-
nace, 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.
• Do not cover the furnace, store trash or
debrisnearit,orinanywayblockthe flow
of fresh air to the unit.
• 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 materi-
als may be combustible.
NOTE:
Donotusethisfurnaceifanypart
has been under water. Immediately call a
qualifiedservicetechniciantoinspectthe
furnaceandtoreplaceanypartofthecon-
trolsystemandanygascontrolwhichhas
been under water.
4
NOTE:
The qualified installer or agency
must use only factory-authorized replace-
ment parts, kits, and accessories when
modifying this product.
If the furnace is left unattended for an
extended period of time, have it checked
periodically for proper operation. This
precaution will prevent problems associ-
atedwithNOHEAT,suchasfrozenwater
pipes, etc. See “BeforeYou Request a
Service Call” section in this manual.
SAFETY
CONSIDERATIONS
Installing and servicing heating equip-
ment 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 opera-
tions must be performed by trained
service personnel. Observe safety pre-
cautions in this manual, on tags, and on
labels attached to the furnace and other
safety precautions that may apply.
Recognizesafety information.Thisisthe
safety-alert symbol . When you see
this symbol on the furnace and in instruc-
tions or manuals, be alert to the potential
for personal injury.
Understand the signal words DANGER,
WARNING, and CAUTION. These
words are used with the safety-alert
symbol. DANGER identifies the most
serious hazards which
will
result in
severe personal injury or death. WARN-
ING signifies hazards which
could
re-
sult in personal injury or death.
CAUTION is used to identify unsafe
practices which
would
result in minor
personal injury or product and property
damage.
STARTINGYOUR
FURNACE
Instead of a continuously burning pilot
flame which wastes valuable energy,
your furnace uses an automatic, hot sur-
faceignitionsystemtolightthepiloteach
time the thermostat starts your furnace.
Follow these important safeguards:
• Never attempt to light the pilot manu-
ally with a match or other source of
flame.
5
• Read and follow the operating instruc-
tions 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 safety information above on
this furnace label. If you don’t smell
gas, go to the next step.
• If a suspected malfunction occurs with
your gas control system, such as the burn-
ers not lighting when they should, refer
totheshutdownproceduresonthefurnace
or in the next section to turn off your
system, 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:
STEPS FOR STARTING
YOUR FURNACE
1. Set your room thermostat to the low-
est temperature setting.
(See Fig. 6.)
2. Closetheexternalmanualgasvalve.
(See Fig. 7.)
3. Turn off the electrical supply to the
furnace. (See Fig. 8.)
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7
ON
OFF
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WARNING
If overheating occurs, or the gas
valve fails to shut off the gas
supply, turn off the manual gas
valve (see Fig. 7) to the furnace
BEFORE turning off the electri-
cal supply. Failure to follow this
warning could result in a fire or
explosion, and personal injury
or death.
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8
4. Turn the switch on the gas valve to
the OFF position and wait
5 minutes. (See Fig. 9.)
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5. After waiting 5 minutes, turn the
switch on the gas valve to the ON
position. (See Fig. 10.)
10
6. Turn on the electrical supply to the
furnace. (See Fig. 11.)
7. Open the external manual gas valve.
(See Fig. 12.)
8. Set the room thermostat to a temper-
ature slightly above room tempera-
ture. This will automatically signal
the furnace to start. The inducer
motor will start, the pressure switch
willclose, andthehotsurfaceigniter
will be energized.
9. The hot surface igniter will light the
pilot flame. Once the pilot flame is
sensed, the gas valve permits gas to
flow to the main burners where it is
ignited.Hot flames beginto warmthe
furnace’s heat exchanger.Afteratime
delay of approximately 30 sec, the
furnace blower is switched on.
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12
If the pilot fails to light, igniter remains
energized, and pilot gas valve remains
open. If this is due to a gas interruption,
the system continues its attempt to light
pilot until gas is restored and unit lights
or system is turned off.
10. Set your thermostat to the tempera-
ture that satisfies your comfort
requirements. SUGGESTION: Set-
ting the thermostat back a few
degrees and compensating for the
difference with warmer clothing
can make a big difference in your
fuel consumption on extremely
colddays.The fewdegreesat the top
of your thermostat “comfort level”
are the most costly degrees to
obtain.
When room temperature drops be-
low the temperature selected on the
thermostat, the furnace will be
switched on automatically. When
room temperature reaches the
degree selected on the thermostat,
the furnace will be switched off
automatically.
Some thermostats have a fan mode
with 2 selections:AUTO and ON.
When set toAUTO, the furnace
blower cycles on and off, controlled
by the thermostat. In ON mode, the
furnace blower runs continuously
except for a 30-sec delay at the call
for heat. This keeps the temperature
level in your home more evenly bal-
anced.Italsocontinuouslyfiltersthe
indoor air.
SHUTTING DOWN
YOUR FURNACE
Shouldyoueversuspectamalfunctionin
your furnace, you will need to turn your
furnace off. The following procedures
must be followed:
1. Set your room thermostat to the
lowest temperature setting.
(See Fig. 13.)
13
14
2. Closethe externalmanualgasvalve.
(See Fig. 7.)
3. Turn off the electrical power to your
furnace. (See Fig. 14.)
4. Turn the switch on the gas valve
to the OFF position. (See Fig. 15.)
15
5. If the furnace is being shut down
because of a malfunction, call your
dealer as soon as possible.
PERFORMING ROUTINE
MAINTENANCE
With proper maintenance and care, your
furnace will operate economically and
dependably. Instructions for basic
maintenance are found on this and the
following pages. However, before begin-
ning maintenance, follow these safety
precautions:
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FILTERING OUTTROUBLE
(Optional Accessory)
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.
The air filter is normally located in the
blower compartment before the blower.
(See Fig. 17.) If the filter(s) has been
installedinanotherlocation,contactyour
dealer for instructions.To inspect, clean,
and/or replace the air filter(s), follow
these steps:
Ifyourfurnacefilterneedstobereplaced,
be sure to use the same size and type of
filterthatwasoriginallysupplied.Usethe
furnace filter table and compare your fur-
nace size with the proper filter size.
HORIZONTAL FURNACE
FILTERTABLE
• REMOVE THE FILTER FOR
CLEANINGAS FOLLOWS:
1. Turn off electrical supply to the
furnace. (See Fig. 14.)
2. Remove blower access door located
at the inlet (return-air) end of the
furnace(4screwsmustberemoved).
(See Fig. 16.)
16
3. Bend the formed wire filter retainer
to clear the furnace flange at
1 side.
4. Pivot the filter retainer toward the
blower. (See Fig. 17.)
5. Remove the filter from the
furnace.
6. Inspect the filter. If torn, replace it.
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 the opposite direction of air-
flowthroughthecross-meshbinding
side.Allow filter to dry.
8. Reinstall the clean filter with the
cross-mesh binding side facing the
furnace blower.
9. Replace blower door, reinstall
4 screws (see Fig. 18), and turn on
electrical power to your furnace.
COMBUSTION AREA
AND VENT SYSTEM
Visually inspectthe combustion area and
vent system before each heating season.
Make sure that the pipe leading into the
vent is free from any cracks and sags.
Also check the vent pipe on the outside
of your home for blockage.
Whendirt,soot,orrustisallowedtobuild
up, your furnace can suffer a loss of effi-
ciency and perform improperly.
Accumulations on the main burners can
result in their firing out of normal
sequence. This delayed ignition will
create an alarmingly loud sound.
17
18
To inspect the combustion area and vent
system, you will need a flashlight.
Refer to Fig. 2, and proceed as
follows:
1. Turn off the electrical supply to your
furnace. (See Fig. 14.)
2. Remove burner enclosure front.
Inspect the gas burners for dirt, rust, or
scale.(SeeFig.19.)Theninspectthevent
outlet area and vent pipe.
19
WARNING
Turn off electrical power supply
to your furnace before removing
the access doors to service or
perform maintenance. 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 han-
dling parts or reaching into the
furnace.
CAUTION
Never operate your furnace with-
out 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 effi-
ciency.
HORIZONTAL
FURNACE
INPUT (BTUH)
FILTER
SIZE
(IN.) FILTER TYPE
50,000 (1) 13 x 23 x 1/2 Cleanable
75,000 (1) 13 x 23 x 1/2 Cleanable
100,000
(1) 16-1/2 x 23 x 1/2
Cleanable
125,000 (1) 20 x 23 x 1/2 Cleanable
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ON
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CAUTION
If your furnace makes an espe-
cially loud noise when the main
burners light, shut down your
furnace and call your dealer.
CAUTION
If dirt, rust, soot, or scale accu-
mulations are found, call your
dealer.
Do not operate your furnace.
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3. Inspect the vent pipe for sags, holes,
cracks, or disconnections.Any hori-
zontal vent pipe must slope upward,
away from the furnace. If rusty
joints or seams, or signs of water
leakage are found, call your dealer
for service.
4. Reinstall the burner enclosure front.
5. If your furnace is free of the above
conditions, restore electrical power
to your furnace. (See Fig. 11.)
6. Start your furnace and observe its
operation. Watch the burner flames
to see if they are clear blue, almost
transparent. (See Fig. 20.) If you
observe a suspected malfunction, or
that the burner flames are not clear
blue, call your dealer.
20
A CHECKUP
CHECKLIST
Your furnace represents an important in-
vestment in your family’s comfort and
your home’s value. To keep it in tip-top
shape and as a preventative to future
problems, have a trained service
specialist give your furnace a profes-
sional check-up annually. The following
checklist can be used as a guideline to
proper service:
• Inspect all flue gas passages, burners,
heat exchangers, and inducer assembly.
• Inspect all combustion and ventilation
air passages and openings, including vent
pipe terminations outside the structure.
• Checkgaspipesleadingtoandinsideof
your furnace for leaks.
• Inspect, clean, and lubricate the blower
motor and wheel as required.
NOTE
: If oil ports are provided, refer to
the unit Service and Maintenance Instruc-
tionsforblowermotor oiling information.
The motor must be oiled by a qualified
service technician.
• Inspect and change or clean air filter(s)
if necessary.
• Inspect all supply- and return-air ducts
for obstructions, air leaks, and insulation.
Remedy any problem when necessary.
• Inspect electrical wiring, connections,
and components for loose connections.
• Perform an operational checkout to
determine whether your furnace is work-
ingproperly and if it requires adjustments.
• Examine the physical support of the
furnace;the support should be sound with
no cracks, sagging, gaps, etc. around the
base.
• Checkthefurnaceforanyobvioussigns
of deterioration.
• Your servicing dealer offers an
economical service agreement that
covers seasonal inspections; ask for
details.
BEFOREYOU REQUEST
A SERVICE CALL
Ifyour furnaceisnotoperatingornotper-
forming properly, you may save the ex-
pense of a service call by checking a
few things yourself before calling for
service.
FOR INSUFFICIENTAIRFLOW:
• Check for dirty air filter(s).
• Check for blocked return-air or supply-
air grilles throughout your home; ensure
they are open and unobstructed.
If problem still exists, call your dealer
for service.
IF FURNACE FAILS TO OPERATE:
Follow this checklist step by step,
advancing to the next 1 only if furnace
fails to start.
• Check thermostat for proper tempera-
ture (set above room temperature).
• Is the thermostat set on HEAT?
• Checkfuses and circuit breakers.Is the
electrical supply on?
• Is the manual shutoff valve in gas s
upply pipe in open position? (Follow
start-up procedures if you open gas
valve.)
NOTE:
Turn off the electrical power sup-
ply before continuing with checklist.
•Is the control knob on gas valve in ON
position? (Follow start-up procedures if
you must reset knob to ON.)
•Check the manual-reset flame rollout
switch located on the burner assembly.
(See Fig. 2.) If the furnace has experi-
enced high temperature conditions, this
switch will shut off the furnace. Reset it
by pushing the button on the switch. If it
trips again, shut down the furnace and
callforservice.See“ShuttingDownYour
Furnace” section in this manual.
•Checkfor obstructions around the vent
termination.
If your furnace still fails to operate, call
your service representative.
Foryourconvenience,recordtheproduct
and serial numbers on the form on
page 2. Should you ever require service,
you will have ready access to the
information needed by the service
representative.
DANGER
If holes are found in the vent
pipe, or if it has become discon-
nected, toxic fumes can escape
into your home. DO NOT OPER-
ATE YOUR FURNACE. Call your
dealer for service.
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—8— Cancels: OM04-26 OM04-31
© 1998 Bryant Heating & Cooling Systems, 7310 W.Morris St. Indpls., IN 46231 PRINTED IN U.S.A Catalog No. 5334-902 6-98