Bryant 345MAV User Manual
USER’S INFORMATION MANUAL
MODEL 345MAV
CONDENSING GAS FURNACE
NOTE TO INSTALLER:
This manual must be left with the equipment user.
As an ENERGY STAR® Partner,
Bryant Heating & Cooling
Systems has determined that
this product meets the ENERGY
STAR® guidelines for energy
efficiency.
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.
WELCOME TO A NEW
GENERATION OF
COMFORT
Congratulations! In light of rising
energy costs, the 345MAV Multipoise
Condensing Gas Furnace is 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, 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.
The furnace is among the most energyefficient furnaces you can buy today. It
is also among the safest and most
dependable. We are proud of the technological advances incorporated into
the design of this furnace. 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 Department of
Energy test procedures.
1
MODEL 345MAV FURNACE
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.
2
FURNACE COMPONENTS
1
Burner sight glass for viewing burner flame.
2
Burner assembly (inside). Operates with energysaving inshot burners and hot surface ignitor for safe,
dependable heating.
3
Combustion-air intake connection (right or left side).
4
Redundant gas valve. Safe, efficient. Features 1 gas
control with 2 internal shutoff valves.
5
Junction box for 115-v electrical power supply.
6
Vent outlet. Uses PVC pipe to carry vent gases from
the furnace’s combustion system (right or left side).
7
Secondary condensing heat exchanger (inside).
Wrings out more heat through condensation.
Constructed with polypropylene-laminated steel to
ensure durability.
8
Pressure switch ensures adequate flow of flue
products through furnace and out vent system.
9
Inducer motor. Pulls hot flue gases through the heat
exchangers, maintaining negative pressure for added
safety.
10
Condensate drain connection. Collects moisture
condensed from burned gases for disposal into home
drain system.
1
2
3
4
5
6
7
8
9
10
11
12
MODEL 345MAV FURNACE
(SHOWN IN UPFLOW POSITION)
13
14
6
15
16
17
18
19
2
11
Heavy-duty blower. Circulates air across the heat
exchangers to transfer heat into the home.
12
Air filter and retainer.
13
Rollout switch (manual reset) to prevent
overtemperature.
14
Primary serpentine heat exchanger (inside).
Stretches fuel dollars with the S-shaped heat-flow
design. Solid construction of corrosion-resistant
aluminized steel means reliability.
15
3-amp fuse provides electrical and component
protection.
16
Light emitting diode (LED) on control center. Code
lights are for diagnosing furnace operation and
service requirements.
17
Control center.
18
Blower access panel safety interlock switch.
19
Transformer (24v) behind control center provides
low-voltage power to furnace control center and
thermostat.
3
IMPORTANT FACTS
Y our gas furnace uses air adjacent to the
furnace for combustion and vents to the
outside. Do not enclose it in an airtight
room or seal it behind solid doors. It
must have adequate airflo w for efficient
combustion and safe ventilation. The
vent pipe must terminate outside the
structure and must not be obstructed in
any way.
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.
• 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 fluorine. 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 these compounds
are burned in your furnace, the heat
exchangers 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 insulation materials may be
combustible.
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 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 modifying this
product.
This furnace contains SAFETY
DEVICES which must be MANUALL Y RESET. If the furnace is left unattended for an extended period of
time, have it checked periodically for
3
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 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 service personnel. Observe
safety precautions in this manual, on
tags, and on 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 safety-alert symbol. DANGER identifies the most serious hazards which
personal 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.
!
will result in severe
could result in
ST AR TING YOUR
FURNA CE
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:
4
• Never attempt to light the burners
manually with a match or other source
of flame.
• 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!
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 the furnace, or in the “Shutting Down Your Furnace” section
and call your dealer as soon as
possible.
Follow “B” in the safety
!
If overheating occurs or the
gas valve fails to shut off the
gas supply, turn off the manual gas valve to the furnace
BEFORE turning off the electrical supply. (See Fig. 7.) Failure to follow this warning
could result in a fire or explosion, and personal injury or
death.
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:
Follow these
WARNING
5
4
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