Bryant 311AAV Series 100 Guide

USER’S INFORMATION MANUAL
MODEL 311AAV and 312AAV
DOWNFLOW/HORIZONTAL/
UPFLOW GAS FURNACE
NOTE TO INSTALLER:
Th s manual must be left w th the
equ pment user.
Multipoise
USER’S INFORMATION MANUAL
— Do not store or use gasol ne or other flammable
vapors and l qu ds n the v c n ty of th s or any
other appl ance.
— WHAT TO DO IF YOU SMELL GAS:
• Do not try to l ght any appl ance.
• Do not touch any electr cal sw tch; do not use
any phone n your bu ld ng.
• Immed ately call your gas suppl er from a
ne ghbor’s phone. Follow the gas suppl er’s
nstruct ons.
• If you cannot reach your gas suppl er, call the
fire department.
— Installat on and serv ce must be performed by a
qual fied nstaller, serv ce agency or the gas
suppl er.
WARNING: If the nformat on n th s manual
s not followed exactly, a fire or explos on may
result caus ng property damage, personal njury
or loss of l fe.
!
Do not use th s furnace f any part has been under
water. Immed ately call a qual fied serv ce techn -
c an to nspect the furnace and to replace any part
of the control system and gas control wh ch has
been under water.

2
WELCOME TO
TODAY’S
GENERATION OF
COMFORT
Congratulations! Your new, higher 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 ex-
tremely reliable. S end just a few minutes with this booklet
to learn about the o eration of your new furnace—and the
small amount of maintenance it takes to kee it o erating at
eak efficiency. Years went into the develo ment of your new
furnace. Take a little time now to assure its most efficient
o eration for years to come.
MODEL 311AAV and 312AAV 1
FURNACE
COMPONENTS
2
OUTER DOOR
MOUNTING SCREWS
VENT ELBOW*
RATING PLATE
BLOCKED
VENT
SAFEGUARD
GAS MANIFOLD
GAS BURNER
FLAME SENSOR
BLOWER DOOR
SAFETY SWITCH
BLOWER AND
MOTOR
PRESSURE
SWITCH
FLUE
COLLECTOR
BOX
GAS VALVE
MANUAL RESET
LIMIT SWITCHES
HOT SURFACE
IGNITER
CONTROL
(Furnac shown in upflow position; may b
us d in downflow or horizontal positions also)
*Elbow may b turn d to a diff r nt position,
d p nding on typ of installation

3
IMPORTANT FACTS
Your furnace must have adequate air-
flow for efficient combustion and safe
ventilation. Do not enclose it in an
airtight room or “seal’’ it behind solid
doors. To minimize the ossibility of
serious ersonal injury, fire, damage
to your furnace, or im ro er o eration;
carefully follow these safety rules:
• Kee the area around your furnace
free of combustible materials, gasoline,
and other flammable liquids and
va ors.
3
• 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-
rine. These com ounds are resent in
many roducts around the home, such
as: water softener salts, laundry
bleaches, detergents, adhesives, aints,
varnishes, aint stri ers, waxes, and
lastics.
During remodeling be sure the com-
bustion air is fresh and uncontami-
nated. If these com ounds are burned
in your furnace, the heat exchangers
and metal vent system may deteriorate.
• A furnace installed in the attic or
other insulated s ace must be ke t free
and clear of the insulating material.
Examine the furnace area when install-
ing the furnace or adding more insula-
tion. Some materials may be
combustible.
NOTE: Do not use this furnace if any
art has been under water. Immediately
call a qualified service technician to in-
s ect the furnace and to re lace any
art of the control system and any gas
control which has been under water.
NOTE: The qualified installer or
agency must use only factory-
authorized re- lacement arts, kits,
and accessories when modifying or
re airing this roduct.
This furnace contains safety devices
which must be manually reset. If the fur-
nace is left unattended for an extended
eriod of time, have it checked eriodi-
cally for ro er o eration. This recau-
tion will revent roblems associated
with no heat, such as frozen water i es,
etc. See “Before You Request a Service
Call’’ section in this manual.
SAFETY
CONSIDERATIONS
Installing and servicing heating equi -
ment can be hazardous due to gas and
electrical com onents. Only trained
and qualified ersonnel should install,
re air, or service heating equi ment.
Untrained ersonnel can erform basic
maintenance functions such as clean-
ing and re lacing air filters. All other
o erations must be erformed by
trained service ersonnel. Observe
safety recautions in this manual, on
tags, and on labels attached to the fur-
nace and other safety recautions that
may a ly.
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
otential for ersonal injury.
Understand the signal words—DAN-
GER, WARNING, and CAUTION.
These words are used with the
safety-alert symbol. DANGER identi-
fies the most serious hazards which
w ll
result in severe ersonal injury or
death. WARNING signifies hazards
which
could result in ersonal injury or
death. CAUTION is used to identify
unsafe ractices which
would result in
minor ersonal injury or roduct and
ro erty damage. NOTE is used to
highlight suggestions which will result
in enhanced installation, reliability or
o eration.
STARTING YOUR
FURNACE
Your furnace uses an automatic hot sur-
face ignition system to light the burners
each time the thermostat signals the
furnace to start.
Follow these mpor-
tant safeguards:
• Never attem t to manually light the
burners with a match or other source of
flame.
4
• Read and follow the o erating in-
structions on the furnace, es ecially 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 label. If you don’t smell gas, go to
the next ste .”
• If a sus ected malfunction occurs
with your gas control system, such as
the burners do not light when they
should, refer to the shutdown roce-
dures on the furnace, or in the next sec-
tion, to turn off your system, then call
your dealer as soon as ossible.
•
CHECK AIR FILTER: Before at-
tem ting to start your furnace, be sure
the filter is clean and in lace. (See the
maintenance section of this manual.)
Then roceed as follows:
5
!
WARNING
hould overheating occur, or
the gas valve fail to shut off the
gas supply, turn off the manual
gas valve ( ee Fig. 6) to the fur-
nace BEFORE turning off the
electrical supply. A failure to
follow this warning could re-
sult in a fire or explosion, and
personal injury or death.
!
®

4
STEPS FOR STARTING
YOUR FURNACE
1.Set your room thermostat to the
lowest tem erature setting. (See
Fig. 5.)
2.Close the external manual gas
valve. (See Fig. 6.)
3.Turn OFF the electrical su ly to
your furnace. (See Fig. 7.)
6
7
8
4.Remove the outer door by remov-
ing two screws. (See Fig. 8.)
5.The gas valve will have a control
switch to turn off and on. Turn the
control switch on the gas valve to
the OFF osition and wait 5 min-
utes. (See Fig. 9.)
6.After waiting 5 minutes, turn the
control switch on the gas valve to
the ON osition. (See Fig. 10.)
7.Re lace the outer door using two
screws. (See Fig. 11.)
8.Turn ON the electrical su ly to
the furnace. (See Fig. 12.)
9.O en the external manual gas
valve. (See Fig. 13.)
10.Set the room thermostat to a tem-
erature slightly above the room
tem erature. This will automati-
cally signal the furnace to start. The
inducer motor will start, and the hot
surface igniter will energize. When
hot, the igniter will have an orange
glow.
9
10
C
L
O
E
1
2
3
O
F
F
2
3
1
M
P
ON
O
F
F
C
OR
ON
OFF
O
F
F
2
3
1
M
P
ON
O
F
F
C
OR
ON
OFF
11
12
13
11. After 32 to 70 sec, the gas valve
ermits 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 a roximately 25 (45 sec low-
stage for 2-stage furnaces) sec, the
furnace blower is switched on.
NOTE: If the main burners fail to ig-
nite, the furnace control system will go
through 3 more ignition cycles. Then,
if burners fail to ignite, the system will
3
1
2
O
P
E
N

5
lockout. If lockout occurs, or the
blower doesn’t come on—shut down
your furnace and call your dealer for
service.
12. Set your thermostat to the tem era-
ture that satisfies your comfort re-
quirements. SUGGESTION:
Setting the thermostat back a few
degrees—and com ensating for the
difference with warmer clothing—
can make a big difference in your
fuel consum tion on extremely
cold days. The few degrees at the
to of your thermostat “comfort
level’’ are the most costly degrees
to obtain.
When the room tem erature dro s
below the tem erature selected on
the thermostat, the furnace will be
switched on automatically. When the
room tem erature reaches the degree
selected on the thermostat, the furnace
will be switched off automatically.
Some thermostats have a “fan’’ mode
with 2 selections: AUTO or ON. When
set on AUTO, the furnace blower cy-
cles on and off, controlled by the ther-
mostat. In the ON osition, the furnace
blower runs continuously exce t for a
42-sec (62 sec low-stage for 2-stage
furnaces) delay at the “call for heat.’’
This kee s the tem erature level in
your home more evenly balanced. It
also continuously filters the indoor air.
SHUTTING DOWN
YOUR FURNACE
Should you ever sus ect a malfunction
in your furnace, you will need to turn
the furnace off. The following roce-
dures must be followed:
1. Set your room thermostat to
the lowest tem erature setting.
(See Fig. 14.)
2. Close the external manual gas
valve. (See Fig. 6 on age 4.)
3. Turn OFF the electrical su ly to
your furnace. (See Fig. 15.)
4. Remove the outer door on your fur-
nace. (See Fig. 8.)
5. Turn the control switch on the gas
valve to the OFF osition. (See
Fig. 9.
14
15
16
6. Re lace the outer door. (See Fig.
11.)
7. If the furnace is being shut down
because of a malfunction, call your
dealer as soon as ossible.
PERFORMING
ROUTINE
MAINTENANCE
With the ro er maintenance and care,
your furnace will o erate economically
and de endably. Basic maintenance,
which can easily be accom lished by
someone who follows the directions, is
found on this and the following ages.
However, before beginning mainte-
nance, follow these safety recautions:
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 s ecified dis-
osable media filter, check or re lace
filter before each heating and cooling
season. Re lace dis osable media filter
at least once a year.
If your furnace filter needs re lacing, be
sure to use the same size and ty e of fil-
ter that was originally su lied.
The air filter is located in the factory-
su lied filter cabinet attached to the
side or bottom of the blower cabinet.
If air filter has been installed in another
location, contact your dealer for instruc-
tions. To ins ect, clean, and/or re lace
the air filter(s), follow these ste s:
1. Turn off electrical su ly to fur-
nace (See Fig. 7.)
®
O
F
F
2
3
1
M
P
ON
O
F
F
C
OR
ON
OFF
WARNING
Turn off electrical power sup-
ply to your furnace before re-
moving the access doors to
service or perform mainte-
nance. A failure to follow this
warning could result in per-
sonal injury or death.
CAUTION
Although special care has
been taken to minimize sharp
edges, be extremely careful
when handling parts or reach-
ing into the furnace.
CAUTION
Never operate your furnace
without a filter in place. Doing
so may damage the furnace
blower motor. An accumula-
tion of dust and lint on internal
parts of your furnace can
cause a loss of efficiency.
!
!
!

6
2. Remove filter cabinet door (See
Fig. 18 and 19.)
NOTE: It will be necessary to re-
move 1 thumbscrew
3. Slide air filter out of filter cabinet.
Kee dirty side u (if dirty) to avoid
s illing dirt. See Fig. 20 and 21.)
4. Ins ect the filter. If torn, re lace it.
NOTE: If washable filter that was
shi ed with the furnace has been re-
laced by:
a) Factory s ecified dis osable media
filter – Do not clean. If dirty, re lace only
with media filter having the same art
number and size. Install with airflow di-
rection arrow ointing towards blower.
b) Electronic air cleaner (EAC) – Re-
fer to EAC owner’s Manual for mainte-
nance information.
5. Wash filter (if dirty) in sink, bath-
tub, or outside with a garden hose.
Always use cold ta water. A mild
liquid detergent may be used if nec-
essary. S ray water through filter in
the o osite direction of airflow.
Allow filter to dry.
6. Reinstall clean air filter.
7. Re lace filter cabinet door. (See
Fig. 22 and 23.)
8. Turn on electrical su ly to furnace
(see Fig. 12.)
* Factory provid d with th furnac .
Filt rs may b fi ld modifi d by cutting
filt r mat rial and support rods (3) in fil-
t rs. Alt rnat siz s and additional fil-
t rs may b ord r d from your d al r.
AIR FILTER LOCATED IN FILTER CABINET:
FILTER
CABINET
HEIGHT (IN.) FILTER IZE (IN.) FILTER TYPE
16 (1)16x25x1*
or (1)16x25x4-5/16 Cleanable Dis osable
CAUTION
Use care when cutting support
rods in filters to protect
against flying pieces and
sharp rod ends. Wear safety
glasses, gloves, and appropri-
ate protective clothing. Failure
to follow this caution could re-
sult in personal injury.
!
COMBUSTION AREA
AND VENT SYSTEM
Ins ect the combustion area and vent
system before each heating season. An
accumulation of dirt, soot, or rust can
mean a loss of efficiency and im ro er
erformance. Buildu s on the main
burners can cause faulty firing. This
“delayed ignition’’ is characterized by
an alarmingly loud sound. If your fur-
nace makes a loud noise when the main
burners are ignited, shut down the fur-
nace—call your servicing dealer.
Use your flashlight and follow these
ste s for ins ecting the combustion
area and vent system of your furnace:
1. Turn off the electrical su ly to the
furnace and remove the access
door. (See Fig. 7 and 8.)
2. Carefully ins ect the gas burner
(see Fig. 17) for dirt, rust, or scale.
Then ins ect the elbow, flue con-
nection area, and the vent i e for
rust.
17
NOTE: If dirt, rust, soot, or scale accu-
mulations are found, call your servic-
ing dealer. DO NOT OPERATE THE
FURNACE.
3. Ins ect the vent i e for a sag,
holes, or a disconnection. A hori-
zontal vent i e must slo e u ward
away from furnace. If rusty joints
or seams, or signs of water leakages
are found call your dealer for ser-
vice.
4. Re lace the access door and restore
electrical ower to the furnace.
(See Fig. 12.)
5. Start the furnace and observe its
o eration. If ossible, watch the
burner flames. Are they burning
bright blue? If not (or if you sus ect
some other malfunction), call your
servicing dealer.
18
19
20
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 FUR-
NACE. Call your dealer for ser-
vice. A failure to follow this
warning could result in per-
sonal injury or death.
!

7
21
22
23
BEFORE YOU REQUEST
A “SERVICE CALL”
BEFORE YOU CALL FOR
SERVICE, CHECK FOR
SEVERAL EASILY SOLVED
PROBLEMS:
• Check for sufficient airflow. Check
the air filter for dirt. Check for blocked
return-air or su ly-air grilles. Be sure
they are o en and unobstructed. If this
isn’t the cause, call your servicing
dealer.
If your furnace isn’t o erating at all,
check the following list for easily
solved roblems:
• Is your thermostat set above room
tem erature? Is the HEAT mode
selected?
• Is the electrical ower su ly switch
ON? Is the blower access door firmly
in lace? Are any fuses blown? (There
is a fuse on the furnace control board.)
Has a circuit breaker tri ed?
• Is the manual shutoff valve in the gas
su ly i e leading to the furnace
o en? Does the lever oint in the same
direction that the i e runs (o en)? Or
is it at right angles (closed)?
NOTE:
Before roceeding with the
next checks, turn OFF the electrical
ower su ly to the furnace. Remove
the access door.
• Is the switch on the gas valve turned
to the ON osition? If this or the re-
ceding check shows an interru tion in
the gas su ly, make sure the gas has
not been shut off for safety reasons. If
nothing else seems to be wrong, follow
the startu rocedures found on ages
4 and 5 of this booklet.
• If for some reason the vent is
blocked, the blocked vent safeguard
switch will shut off the furnace. (See
age 2 for switch location.) The switch
will automatically reset after the fur-
nace cools off.
• Check the manual-reset limit
switches located near the burners. If the
furnace has ex erienced a high-tem-
erature condition, due to inadequate
combustion air, these switches will
shut off the furnace. Reset the switches
by ushing the button on the switch. If
the switch tri s a second time, turn off
the furnace and call for service.
• If your furnace still fails to o erate,
call your servicing dealer for trouble-
shooting and re airs. Tell your dealer
the model and serial numbers for your
furnace. (You should have them re-
corded on age 8 of this booklet.) By
knowing exactly which furnace you
have, the dealer may be able to offer
suggestions over the hone, or save
valuable time through knowledgeable
re aration for the service call.
REGULAR DEALER
MAINTENANCE
In addition to the ty e of routine main-
tenance you might be willing to do,
your furnace should be ins ected
regularly by a ro erly trained service
technician. An annual ins ection (or
biennial ins ection, at least) should
include the following:
1. Ins ection of all flue gas as-
sages—including the burners, heat
exchanger, inducer, elbow, and vent
i e.
2. Ins ection of all combustion
and ventilation air assages and
o enings.
3. Close check of all gas i es
leading to (and inside of) your
furnace.
4. Ins ection and cleaning of the
blower motor and wheel.
5. Routine ins ection and cleaning/
re lacement of the air filter.
6. Ins ection of all su ly- and
return-air ducts for obstructions,
air leaks, and insulation. Any rob-
lems found should be resolved at
this time.
7. Ins ection of furnace installation
for ro er su ort and any obvi-
ous deterioration of the furnace.
The su ort must be sound and
without sags, ga s, cracks, etc.,
around the furnace base so as to
rovide an air seal between the
return-air duct and furnace.
8. A check for loose connections
attaching individual com onents.
Ins ection of all electrical wiring
and their connections.
9. O erational check of the furnace
itself to determine working condi-
tion. Re air or adjustment should
be made at this time.
Ask your servicing dealer for
further details about an economical
service contract that covers seasonal
ins ections.

8
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© 2000 Bryant H ating & Cooling Syst ms, 7310 W. Morris St. Indpls., IN 46231 PRINTED IN U.S.A. Catalog No. 5331-101 11-00
IN TALLATION DATA
Dat Install d
D al r Nam
Addr ss
City
Stat /Provinc Zip/Postal Cod
T l phon
FURNACE
Product No.
Mod l No.
S rial No.
AIR CONDITIONER OR HEAT PUMP
OUTDOOR UNIT:
Product No.
Mod l No.
S rial No.
INDOOR COIL:
Product No.
Mod l No.
S rial No.