Bryant 350Mav Users Manual

355MAV to the manual 62a694f6-aaf7-4bc6-ae66-8edb9cef1582

2015-02-02

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USER’S INFORMATION MANUAL

MODEL 340MAV, 350MAV, 352MAV,
355MAV CONDENSING GAS
FURNACE
USER: Please read all instructions in
the manual and retain all manuals for
future reference.

NOTE TO INSTALLER:
This manual must be left with the equipment user.

! WARNING:
FIRE OR EXPLOSION HAZARD
Failure to follow safety warnings exactly could
result in serious injury, death, or property damage.
— 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.
• Leave the building immediately.
• 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. A flood-damaged furnace is
extremely dangerous. Attempts to use the
furnace can result in fire or explosion. A
qualified service agency should be contacted
to inspect the furnace and to replace all gas
controls, control system parts, electrical
parts that have been wet or the furnace if
deemed necessary.

! WARNING:
Carbon Monoxide is invisible, odorless, and toxic!
Bryant Heating and Cooling Systems recommends
a carbon monoxide alarm in your home, even if
you do not own a gas appliance. Locate the carbon
monoxide alarm in the living area of your home
and away from gas appliances and doorways to attached garages. Follow the alarm manufacturer’s
instruction included with the alarm.

TABLE OF CONTENTS

Shutting Down Your Furnace. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
PERFORMING ROUTINE MAINTENANCE. . . . . . . . . . . . . . . . . . . . 6

WELCOME TO A NEW GENERATION OF COMFORT. . . . . . . . .2

Filtering Out Trouble. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

GENERAL FURNACE SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
FURNACE COMPONENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

COMBUSTION AREA AND VENT SYSTEM . . . . . . . . . . . . . . . 8

SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Heading South For the Winter . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

BEFORE STARTING YOUR FURNACE . . . . . . . . . . . . . . . . . . . . . . . .4

A CHECK-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9,10

STARTING AND SHUTTING DOWN YOUR FURNACE. . . . . . . . .4

BEFORE YOU REQUEST A SERVICE CALL . . . . . . . . . . . . . . . . . .10

Steps for Starting Your Furnace . . . . . . . . . . . . . . . . . . . . . . . . . . 4,5

INSTALLATION DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

WELCOME TO A NEW
GENERATION OF
COMFORT
Congratulations! In light of rising
energy costs, the Plus 90TM, 340MAV,
Plus90t™ and Plus 90iTM Multipoise,
Gas-Fired, Condensing Furnaces are
among the soundest investments
today’s homeowner can make.
Your new furnace is truly a triumph
of technology in home heating. A
revolutionary design employs 2 heat
exchangers to “squeeze” out the maximum amount of heat from the fuel consumed. In fact, your new furnace is so
efficient, over 90%* of the heat generated during combustion is captured and
delivered inside your home. That is
more than a 33%* increase in heating
efficiency over conventional furnaces.
These are among the most energy-efficient furnaces you can buy today. They
also are among the safest and most
dependable. We are proud of the technological advances incorporated into
the design of these furnaces. With only
minimal care, your new furnace will
deliver many years of money-saving
home comfort and enjoyment. Spend
just a few minutes with this manual to
learn the operation of your new furnace and the small amount of maintenance it takes to help keep it operating
at peak efficiency year after year.
* The output capacity and any representations of efficiency
for this furnace are based on standard U.S. Department of
Energy test procedures.

CERTIFIED

As an ENERGY STAR®
Partner, Bryant Heating &
Cooling Systems has
determined that this product
meets the ENERGY STAR®
guidelines for energy
efficiency.

MODELS 340MAV
(SHOWN) AND 350MAV
FIXED-CAPACITY
FURNACES

GENERAL FURNACE SAFETY

MODEL 355MAV
VARIABLE-CAPACITY
AND MODEL 352MAV
TWO-STAGE
FURNACES

7. Fire or Explosion Hazard Warning. . . . . . . . . . . . . . . . . . . . . . . . . . 1

1. Combustible Materials, Gasoline Warning . . . . . . . . . . . . . . . . . 1,4

8. Carbon Monoxide Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

2. Furnace Must be Kept Free and Clear of Insulating
Material Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

9. Service and Maintenance Electrical Hazard Warning . . . . . . . . . 6
10. Improper Vent Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3. Furnace Needs Air for Combustion and Ventilation Warning . . .4

11. Sharp Edges Caution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

4. Starting (Lighting) and Shutting Down the Furnace Warning. . .7

12. No Filter Caution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

5. Proper Furnace Shutdown Procedures. . . . . . . . . . . . . . . . . . . . . . .5

13. Filter Rod Modification Caution . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

6. Flood Damage Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

14. Dirt, Rust, or Accumulation Caution . . . . . . . . . . . . . . . . . . . . . . . . 7

FURNACE COMPONENTS
1
2

Burner sight glass for viewing burner flame.

Burner assembly (inside). Operates with energysaving inshot burners and hot surface igniter for safe,
dependable heating.

Redundant gas valve. Safe and efficient. Features 1 gas
control with 2 internal shutoff valves. Valve appearance
varies with furnace model.

Vent outlet. Uses PVC pipe to carry flue gas from
the furnace’s combustion system (right or left side).

Inducer motor. Pulls hot flue gases through the heat
exchangers, maintaining negative pressure for added
safety.

Blower access panel safety interlock switch.

Air filter and retainer.

Condensate drain connection. Collects moisture
condensed from burned gases for disposal into home
drain system. (Location in furnace varies.)

Heavy-duty blower. Circulates air across the heat
exchangers to transfer heat into the home.

Secondary condensing heat exchanger (inside).
Wrings out more heat through condensation.
Constructed with polypropylene-laminated steel to
ensure durability.

Furnace control board.

3-amp fuse provides electrical and component
protection.

12
18
5

4
5
11
16
6
9

14
15
13
7
19

10
8

MODELS 340MAV, 350MAV,
AND 352MAV FURNACES
(UPFLOW POSITION)

12
1
5

Pressure switch(es) ensure adequate flow of flue
gas through furnace and out vent system.

Rollout switch (manual reset) to prevent
overtemperature.

Junction box for 115-v electrical power supply. (May be
located on right or left side)

Transformer (24v) behind furnace control board provides low-voltage power to furnace control board and
thermostat.

4
18
6
5

Light emitting diode (LED) on furnace control board.
Code light is for diagnosing furnace operation and
service requirements.

Primary serpentine heat exchanger (inside).
Stretches fuel dollars with the S-shaped heat-flow
design. Solid construction of corrosion-resistant
aluminized steel means reliability.

Combustion-air intake connection to ensure
contaminant-free air (right or left side).

16
9
8

MODEL 355MAV
FURNACE (UPFLOW POSITION)
3

14
13
7
19
10

SAFETY
CONSIDERATIONS

BEFORE STARTING
YOUR FURNACE

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, CAUTION and NOTE.
DANGER, WARNING and CAUTION
are used with the safety-alert 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. NOTE is
used to highlight suggestions which will
result in enhanced installation, reliability,
or operation.
To minimize the possibility of serious
personal injury, fire, damage to
your furnace, or improper operation,
carefully follow these safety rules:
Your gas furnace uses air from
outside the home for combustion
and vents flue gas to the outdoors. It is
not to be installed using in-house air.
The vent and air-intake pipes must terminate outside the structure and must
not be obstructed in any way. Do not
block or obstruct air openings on furnace or spaces around the furnace.

Examine the furnace installation to
determine that:
1. All flue gas carrying areas external
to the furnace (i.e. chimney, vent
connector) are clear and free of
obstructions.
2. The vent connector is in place,
slopes upward and is physically
sound without holes or excessive
corrosion.
3. The return-air duct connection(s)
is physically sound, is sealed to the
furnace casing, and terminates
outside the space containing the
furnace.
4. The physical support of the furnace
is sound without sagging cracks,
gaps, etc. around the base.
5. There are no obvious signs of deterioration of the furnace.
6. The pilot and burner flames are in
good adjustment (by comparison
with pictorial sketches or drawings
of the main burner flame and, if
applicable, the pilot burner flame).

6
• Do not cover the furnace, store trash
or debris near it, or in any way block
the 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 the
furnace is installed or when insulation
is added. Some insulation materials
may be combustible.
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.

! WARNING
Fire Hazard! Failure to keep insulation clear of furnace could
result in fire, personal injury/
death or property damage.

! WARNING
Do not keep combustible materials, gasoline, and other
flammable liquids or vapors
around your furnace. Failure
to follow this warning could result in fire, personal injury/
death or property damage.

STARTING AND
SHUTTING DOWN
YOUR FURNACE
Instead of a continuously burning pilot
flame which wastes valuable energy,
your furnace uses an automatic, hot
surface ignition system to light the
burners each time the thermostat
starts your furnace. Follow these
important safeguards:

! WARNING

5
• Keep the area around your furnace
clear and free of combustible materials, gasoline, and other flammable liquids and vapors.

For proper and safe operation
the furnace needs air for combustion and ventilation. Do not
block or obstruct the openings
on the furnace, air openings to
the area in which the furnace is
installed, and the space
around the furnace. Failure to
follow this warning could result in fire, personal injury/
death or property damage.

7
• Never attempt to manually light the
burners with a match or other source of
flame.
• Read and follow the operating
instructions on inside of main furnace
door, especially the item that reads as
follows:
Wait 5 minutes to clear out any gas.
Then smell for gas, including near

OFF

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 burners not lighting when they
should, refer to the shutdown procedures on inside of main furnace door,
or in the “Shutting Down Your Furnace” section and call your dealer as
soon as possible.

For 340MAV and 350MAV

! WARNING

If overheating occurs or the
gas valve fails to shut off the
gas supply, turn off the external manual gas valve to the
furnace BEFORE turning off
the electrical supply. (See Fig.
9.) Failure to follow this warning could result in a fire or explosion, and personal injury/
death or property damage.

1. Set your room thermostat to the
lowest temperature setting.
(See Fig. 8.)

STEPS FOR STARTING
YOUR FURNACE

For 352MAV and 355MAV

OFF

CHECK AIR FILTER: Before
attempting to start your furnace, be
sure the furnace air filter is clean and in
place. See “Performing Routine Maintenance” section in this manual.
Then proceed as follows:

2. Close the external manual gas
valve. (See Fig. 9.)
3. Turn OFF electrical supply to the
furnace. (See Fig. 10.)
4. Remove main furnace door. (See
Fig. 11.)
5. The gas valve will have a control
switch to turn OFF or ON. Turn
control switch on the gas control to
the OFF position and wait 5 minutes. (See Fig. 12 or 13.) Then
smell for gas, including near the
floor. If you smell gas, STOP! Follow “B” on furnace label. If you
don’t smell gas, go to next step.
6. After waiting 5 minutes, turn control switch on the gas valve to the
ON position. (See Fig. 14 or 15.)
7. Replace main furnace door.
(See Fig. 16.)

For 340MAV and 350MAV

11
8

CL
SE
O

For 352MAV and 355MAV

12
9
5

8. Turn ON electrical supply to the
furnace and wait 1 minute.
(See Fig. 17.)
9. Open the external manual gas
valve. (See Fig. 18.)
10. Set room thermostat to a temperature slightly above room temperature. This will automatically
signal the furnace to start.
11. When the furnace receives the
start signal, the inducer is started.
When the pressure switch senses
that there is sufficient combustion
air, the hot surface igniter is energized. After the hot surface igniter
is heated for 17 seconds, the gas
valve permits gas to flow to the
main burners. After ignition and a
time delay of about 60 sec, the furnace blower will start. Variablecapacity furnaces start at low
speed until the control makes the

necessary adjustments to operate
the blower at either the low- or
high-heat speed.

4 attempts, the furnace control system
will lock out. If lockout occurs, main
burners fail to light, or blower does not
come on, shut down the furnace and
call your dealer for service.
12. Set your thermostat to the temperature that satisfies your comfort
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.

22
6. Replace main furnace door.
(See Fig. 16.)
7. If the furnace is being shut down
because of a malfunction, call
your dealer as soon as possible.

! CAUTION
Furnace is not to be installed,
operated, and then turned off
and left turned off in an unoccupied structure during winter.
(See “Heading South for the
Winter?” procedures in maintenance section on page 9.)
Freeze damage to furnace
would occur.

18
NOTE: If the burners fail to ignite after

For 340MAV and 350MAV

Should you need to shut down your
furnace for service or maintenance,
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. 19.)

For 352MAV and 355MAV

SHUTTING DOWN
YOUR FURNACE

20
2. Close the external manual gas
valve. (See Fig. 9.)
3. Turn off electrical supply to the
furnace. (See Fig. 20.)
4. Remove main furnace door.
(See Fig. 11.)
5. Turn switch on the gas valve to
OFF position.
(See Fig. 21 or 22.)

OFF

When room temperature drops
below the temperature selected
on the thermostat, the furnace
will be switched on automatically.
When room temperature reaches
the temperature selected on the
thermostat, the furnace will be
switched off automatically.
Some thermostats have a FAN
mode with 2 selections, AUTO
and ON. When thermostat is set
to AUTO, the furnace blower
cycles on and off. In ON mode, the
furnace blower runs continuously. Continuous fan keeps the
temperature level in your home
more evenly balanced. It also permits the indoor air to be continuously filtered. Fan On Plus™ –On
all but the 340MAV, the blower
speed can be increased or
decreased if desired due to change
of seasons, large gatherings in
your home, etc. Simply change
your FAN from ON to OFF (or
AUTO depending on your thermostat), and then return to ON. The
blower will switch to the next
highest speed. There are at least 3
speeds to choose from. If the
blower is running on its highest
speed, a request to change will
direct the blower to return to its
lowest speed.

PERFORMING
ROUTINE
MAINTENANCE
NOTE: The qualified installer or
agency must use only factoryauthorized replacement parts, kits,
and accessories when modifying this
product.

Installing and servicing of 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 and qualified service agency
personnel. Observe safety precautions
in this manual, on tags, and on labels
attached to the furnace and other safety
precautions that may apply.
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 beginning
maintenance, follow these safety precautions:

! WARNING
Turn off electrical power supply to your furnace before removing the main furnace door
to service or perform maintenance. Failure to follow this
warning could result in personal injury/death or property
damage.

! CAUTION
Although special care has
been taken to minimize sharp
edges, be extremely careful
when handling parts or reaching into the furnace. Failure to
follow this caution woud result
in minor personal injury.

FILTERING OUT TROUBLE
! CAUTION
Never operate your furnace
without the air 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
and would cause minor property or product damage.

A dirty air filter will cause a loss of airflow
in your duct system. When excessive loss

of airflow occurs, the furnace may cycle
on its safety controls. If this condition is
left unattended, the furnace will eventually lock out. It is recommended that the
furnace air filter 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 media filter at least
once a year.
The air filter is normally located in the
blower compartment (See Fig. 3 or 4.)
or in the factory-supplied filter cabinet
attached to the side or bottom of the
furnace casing. 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:
1. Turn off electrical supply to furnace. (See Fig. 20.)
2. Remove door/access panel
• AIR FILTER(S) LOCATED IN
BLOWER COMPARTMENT
a. Remove main furnace door.
(See Fig. 23.)
b. Remove blower access panel.
(See Fig. 24.)
NOTE: It will be necessary to
remove 2 screws
• AIR FILTER LOCATED IN FILTER CABINET
a. Remove filter cabinet door (See
Fig. 25 and 26.)
NOTE: It will be necessary to
remove 1 thumbscrew
3. Remove air filter from furnace.
• AIR FILTER LOCATED IN
BLOWER COMPARTMENT
BOTTOM:
a. Slide filter retainer sideways
until it is free of latch. (See
Fig. 27.)
b. Slide air filter out of furnace.
(See Fig. 28.)
• AIR FILTER(S) LOCATED IN
BLOWER COMPARTMENT
SIDE:
a. Remove filter retainer from
latch. (See Fig. 29.)
b. Gently remove air filter and
carefully turn the dirty side up
(if dirty) to avoid spilling dirt
from the filter. (See Fig. 30.)
• 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.)

26
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. If washable filter, 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 blower access panel and
main furnace door (See Fig. 33
and 34) or filter cabinet door (Fig.
35 and 36.)

9. Turn on electrical supply to furnace.
If your furnace air filter needs to be
replaced, be sure to use a factory
authorized filter of the same size that
was originally supplied. Use the filter
tables and compare your furnace size
with the proper filter size.

30
33
8

FURNACE AIR FILTER
TABLE
AIR FILTER LOCATED IN BLOWER COMPARTMENT
FURNACE
CASING
WIDTH
(IN.)

FILTER SIZE
(IN.)
*Side
Return†

Bottom
Return

FILTER
TYPE

17-1/2

(1) 16 x
25 x 1*

Cleanable

(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
HEIGHT
(IN)

FILTER SIZE
(IN.)

FILTER TYPE

(1) 16 x 25 x 1*
or (1) 16 x 25 x 4-5/16

Cleanable or
Disposable

(1) 20 x 25 x 1*
or (1) 20 x 25 x 4-5/16

Cleanable or
Disposable

(1) 24 x 25 x 1*
or (1) 24 x 25 x 4-5/16

Cleanable or
Disposable

* Factory-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.
† Upflow only.

! 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.

COMBUSTION AREA
AND VENT SYSTEM
Visually inspect the combustion area
and vent system before each heating
season. Make sure that all PVC pipes
leading into the combustion area and
vent are free from any cracks and sags.

When dirt, soot, scale, or rust is
allowed to build up, your furnace can
suffer a loss of efficiency and perform
improperly. Accumulations on the
main burners can result in firing out of
normal sequence. This delayed ignition creates an alarmingly loud sound.

! CAUTION
If your furnace makes an especially loud noise when the
main burners light, shut down
your furnace and call your
dealer. Failure to follow this
caution would result in minor
property damage.

To inspect the combustion area and
vent system, you will need a flashlight.
Refer to Fig. 3 or 4, and proceed as
follows:
1. Turn off gas and electrical supplies
to the furnace and remove
the main furnace door. (See Fig. 9,
10, and 11.)
2. Remove burner enclosure front.
(See Fig. 37 or 38.)
Inspect the gas burners, igniter
area, and remainder of furnace for dirt,
rust, soot, or scale.

38
4. Reinstall burner enclosure front.
5. If your furnace is free of the above
conditions, replace main furnace
door and turn on electrical and gas
supplies to your furnace.
(See Fig. 16, 17, and 18.)
6. Start the furnace and observe its
operation. Watch the burner flames
to see if they are clear blue, almost
transparent. (See Fig. 39.) If you
observe a suspected malfunction,
or the burner flames are not clear
blue, call your dealer.

! CAUTION
If dirt, rust, soot, or scale accumulations are found, call your
dealer. Do not operate your
furnace. Failure to follow this
caution would result in minor
property or product damage.

3. Inspect the combustion-air and
vent PVC pipes for sags, holes,
cracks, or disconnections. Horizontal portions of pipes must slope
downward toward furnace.

39
HEADING SOUTH FOR THE
WINTER?
DON’T FORGET YOUR
FURNACE!

! DANGER
If holes are found in the pipes
or if any portion has become
disconnected, toxic fumes
can escape into your home.
DO NOT OPERATE YOUR
FURNACE. Call your dealer for
service. Failure to follow this
warning could result in personal injury or death.

Also check the combustion-air intake
and vent pipes on the outside of your
home for blockage.

DOWNFLOW

! CAUTION
If the furnace is installed in an
unconditioned space where
the ambient temperatures may
be 32°F or lower, freeze protection measures must be taken
to prevent minor property or
product damage.
UPFLOW

Since the furnace uses a condensing
heat exchanger, some water will accumulate in the unit as a result of the heat

• Inspect and clean the blower motor
and wheel.

transfer process. Therefore, once it
has been operated, it cannot be turned
off and left off for an extended period
of time when temperatures will reach
32°F or lower unless winterized. Follow these procedures to winterize your
furnace:
1. Obtain propylene glycol (RV/
swimming pool antifreeze or
equivalent).

NOTE: The inducer and blower motors

! CAUTION
Do not use ethylene glycol
(Prestone II antifreeze coolant
or equivalent). Failure of plastic components will occur.

2. Turn off electrical supply to the
furnace. (See Fig. 20.)
3. Remove main furnace door.
(See Fig. 23.)
4. Remove upper inducer housing
drain connection cap.
(See Fig. 40.)
5. Connect field-supplied 1/2-in.
ID tube to upper inducer housing
drain connection.
6. Insert field-supplied funnel into
tube.

41
7. Pour 1 quart of antifreeze into
funnel/tube. Antifreeze should
run through inducer housing,
overfill condensate trap, and flow
into open field drain. (See Fig. 41.)
8. Remove funnel and tube from
inducer housing and replace drain
connection cap and clamp.
9. Replace main furnace door.
(See Fig. 34.)
10. Propylene glycol need not be
removed before restarting
furnace.

A CHECK-UP
CHECKLIST

Your furnace represents an important
investment in your family’s comfort
and your home’s value. To keep it
performing properly and to prevent
future problems, have a trained service
specialist give your furnace a professional check-up annually. The following checklist can be used as a guideline
to proper service:
• Inspect all flue gas passages, burners, heat exchangers, coupling
box(es), and inducer assembly.
• Inspect all combustion-air and vent
piping inside structure and pipe terminations outside the structure.
• Check gas pipes leading to and
inside of your furnace for leaks.

are pre-lubricated and require no additional lubrication. These motors can be
identified by the absence of oil ports on
each end of the motor.
• 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 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.
• Inspect electrical wiring, connections, and components for loose
connections.
• Perform an operational checkout to
determine whether your furnace is
working properly and if it requires
adjustments.
• Inspect all condensate drain tubes
and condensate trap assembly for
leaks. The condensate removal system
should be cleaned annually by a qualified service agency. Refer to the Service and Maintenance Instructions for
further information.
• Examine the physical support of the
furnace. The support should be sound
with no cracks, sagging, gaps, etc.
around the base.
• Check furnace for any obvious signs
of deterioration.

BEFORE YOU
REQUEST A
SERVICE CALL
If your furnace is not operating or not
performing properly, you may save
the expense of a service call by checking a few things yourself before calling
for service.
FOR INSUFFICIENT AIRFLOW:
• 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 step only if furnace fails to start.
• Check thermostat for proper temperature. Is thermostat set above room
temperature?
• Is thermostat set to HEAT?
• Check fuses and circuit breakers. Is
electrical supply on?
• Is manual shutoff valve in gas supply
pipe in open position? (Follow start-up
procedures if you open gas valve.)

NOTE: Turn off electrical supply

before continuing with checklist.
• Is control switch on gas valve in ON
position? (Follow start-up procedures
if you must reset switch to ON position.)
• Check manual reset flame rollout
switch located on the burner box in
combustion area. (See Fig. 3 or 4.) If
furnace has experienced 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 call for service. See “Shutting Down Your Furnace” section in this manual.
• Check for obstructions around the

vent termination outside the structure.
If your furnace still fails to operate, call
your service representative.
For your convenience, record the furnace product and serial numbers on
back page. Should you ever require service, you will have ready access to the
information needed by your service
representative.
This furnace has a light emitting diode
(LED) status code display to aid the
installer, service technician, or homeowner while installing or servicing the
unit. The LED code can be seen by
removing the access door and viewing
LED through the view port in the
blower access panel.

INSTALLATION DATA

AIR CONDITIONER OR HEAT PUMP

Date Installed

OUTDOOR UNIT:

Dealer Name

Product No.

Address

Model No.

City

Serial No.

State

Zip
INDOOR COIL:

Telephone

Product No.
FURNACE
Model No.
Product No.
Serial No.
Model No.
Serial No.

Printed in U.S.A.

Cancels: OM05-39
Catalog No. 5334-017

OM05-42
10-03

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