355MAV
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.
!
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.
This manual must be left with the equipment user.
NOTE TO INSTALLER:
• 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
WELCOME TO A NEW GENERATION OF COMFORT . . . . . . . . .2
GENERAL FURNACE SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
FURNACE COMPONENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
BEFORE STARTING YOUR FURNACE . . . . . . . . . . . . . . . . . . . . . . . .4
STARTING AND SHUTTING DOWN YOUR FURNACE . . . . . . . . .4
Steps for Starting Your Furnace . . . . . . . . . . . . . . . . . . . . . . . . . . 4,5
WELCOME TO A NEW
GENERATION OF
COMFORT
Congratulations! In light of rising
energy costs, the Plus 90
Plus90t™ and Plus 90i
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. Depar tment of
Energy test procedures.
TM
, 340MAV,
TM
Multipoise,
MODELS 340MAV
(SHOWN) AND 350MAV
FIXED-CAPACITY
FURNACES
Shutting Down Your Furnace. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
PERFORMING ROUTINE MAINTENANCE . . . . . . . . . . . . . . . . . . . . 6
Filtering Out Trouble. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
COMBUSTION AREA AND VENT SYSTEM . . . . . . . . . . . . . . . 8
Heading South For the Winter . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
A CHECK-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9,10
BEFORE YOU REQUEST A SERVICE CALL . . . . . . . . . . . . . . . . . . 10
INSTALLATION DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
CERTIFIED
As an ENERGY STAR®
Partner, Bryant Heating &
Cooling Systems has
determined that this product
meets the ENERGY STAR®
guidelines for energy
efficiency.
1
MODEL 355MAV
VARIABLE-CAPACITY
AND MODEL 352MAV
TWO-STAGE
FURNACES
2
GENERAL FURNACE SAFETY
1. Combustible Materials, Gasoline Warning . . . . . . . . . . . . . . . . . 1,4
2. Furnace Must be Kept Free and Clear of Insulating
Material Warning
3. Furnace Needs Air for Combustion and Ventilation Warning
4. Starting (Lighting) and Shutting Down the Furnace Warning
5. Proper Furnace Shutdown Procedures
6. Flood Damage Warning
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
. . .4
. . .7
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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
7. Fire or Explosion Hazard Warning
8. Carbon Monoxide Warning
9. Service and Maintenance Electrical Hazard Warning
10. Improper Vent Warning
11. Sharp Edges Caution
12. No Filter Caution
13. Filter Rod Modification Caution
14. Dirt, Rust, or Accumulation Caution
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
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FURNACE COMPONENTS
1
Combustion-air intake connection to ensure
contaminant-free air (right or left side).
2
Burner sight glass for viewing burner flame.
3
Burner assembly (inside). Operates with energysaving inshot burners and hot surface igniter for safe,
dependable heating.
4
Redundant gas valve. Safe and efficient. Features 1 gas
control with 2 internal shutoff valves. Valve appearance
varies with furnace model.
5
Vent outlet. Uses PVC pipe to carry flue gas from
the furnace’s combustion system (right or left side).
6
Inducer motor. Pulls hot flue gases through the heat
exchangers, maintaining negative pressure for added
safety.
7
Blower access panel safety interlock switch.
8
Air filter and retainer.
9
Condensate drain connection. Collects moisture
condensed from burned gases for disposal into home
drain system. (Location in furnace varies.)
10
Heavy-duty blower. Circulates air across the heat
exchangers to transfer heat into the home.
11
Secondary condensing heat exchanger (inside).
Wrings out more heat through condensation.
Constructed with polypropylene-laminated steel to
ensure durability.
12
Primary serpentine heat exchanger (inside).
Stretches fuel dollars with the S-shaped heat-flow
design. Solid construction of corrosion-resistant
aluminized steel means reliability.
13
Furnace control board.
14
3-amp fuse provides electrical and component
protection.
15
Light emitting diode (LED) on furnace control board.
Code light is for diagnosing furnace operation and
service requirements.
16
Pressure switch(es) ensure adequate flow of flue
gas through furnace and out vent system.
17
Rollout switch (manual reset) to prevent
overtemperature.
18
Junction box for 115-v electrical power supply. (May be
located on right or left side)
19
Transformer (24v) behind furnace control board provides low-voltage power to furnace control board and
thermostat.
MODELS 340MAV, 350MAV,
AND 352MAV FURNACES
(UPFLOW POSITION)
MODEL 355MAV
FURNACE (UPFLOW POSITION)
3
3
4
SAFETY
CONSIDERATIONS
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
sonal injury or death. WARNING signifies hazards which
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
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.
will result in severe per-
!
could result in
will
• 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.
BEFORE STARTING
YOUR 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,
6
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).
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.
important safeguards:
Follow these
• Keep the area around your furnace
clear and free of combustible materials, gasoline, and other flammable liq-
uids and vapors.
!
WARNING
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
5
around the furnace. Failure to
follow this warning could result in fire, personal injury/
death or property damage.
4
• 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
7
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