USER’S INFORMATION MANUAL
MODEL 374RAN
OIL FURNACE
NOTE TO INSTALLER:
This manual must be left with the equipment user.
!
WARNING: If the information in this manual
is not followed exactly, a fire or explosion could
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 OIL:
— Do not try to light any appliance.
— Do not touch any electrical switch; do not use
any phone in your building.
• Immediately call your fuel supplier from a
neighbor’s phone. Follow the fuel supplier’s
instructions.
• If you cannot reach your fuel supplier, call the
fire department.
— Installation and service must be performed by a
qualified installer, service agency or the fuel
supplier.
Do not use this furnace if any part has been under
water. Immediately call a qualified service techni-
cian to inspect the furnace and to replace any part
of the control system and any oil control which
has been under water.
!
WARNING: CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in personal injury or death.
Carbon Monoxide is invisible, odorless, and toxic! Bryant 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.
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FURNACE COMPONENTS
6
7
8
9
5
4
3
2
1
10
11
12
SEE NOTES: 13, 14
Left side, right side, or bottom.
2
1
2
3
4
5
Variable Speed blower circulates air across the
heat exchanger to transfer heat into the home.
8
Reversible door provides easy access to burner
and controls.
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Stainless steel combustion chamber/primary
heat exchanger.
High-performance oil burner.
10
Adjustable electronic fan control (inside) with
low-voltage electrical terminal strip for easy
connection of thermostat, cooling control, elec-
tronic air cleaner, and humidifier.
Unique silencer system reduces combustion
noise.
Heat exchanger designed and shaped to effi-
ciently transfer heat from furnace into the home.
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12
13
Access door to air filters and blower.
Air filter (field-supplied).
Return-air plenum.
Fully insulated internal walls to minimize heat
loss.
6
7
Supply-air plenum.
High limit control to prevent overtemperature
operation.
3
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Immediately call a qualified ser- minor personal injury or product
vice technician to inspect the fur- and property damage. NOTE is
nace and to replace any part of the used to highlight suggestions which
control system, electrical compo- will result in enhanced installation,
nents, and any oil control which reliability or operation.
has been under water.
IMPORTANT FACTS
Your furnace must have adequate
airflow for efficient combustion
and safe ventilation. Do not
enclose it in an airtight room or
“seal” it behind solid doors.
!
WARNING
NOTE: The qualified installer or
agency must use only factory-
authorized replacement parts, kits,
and accessories when servicing
this product.
To minimize the possibility of
serious personal injury, fire, fur-
nace damage, or improper opera-
tion, carefully follow
safety rules:
FIRE, EXPLOSION, CARBON
MONOXIDE POISONING
HAZARD
Failure to follow this warning
could lead to sooting, fire, ex-
plosion, and/or severe bodily
harm.
these
The furnace burner control has a
safety device which must be man-
ually reset. If the furnace is left
unattended for an extended period
of time, have it checked periodi-
cally for proper operation. This
precaution will prevent problems
associated with no heat, such as
frozen water pipes, etc.
For use with grade 2 Fuel Oil
maximum. Do not use Gaso-
line, Crankcase Oil, or any Oil
containing Gasoline!
FORYOUR SAFETY
Do not store or use gaso-
line or other flammable
vapors and liquids in the
vicinity of this or any oth-
er appliance.
!
CAUTION
FIRE AND UNIT OVERHEAT
HAZARD
Failure to follow this caution
may result in unit damage.
Never burn garbage or paper
in the heating system and
never leave rags, paper, or
any flammable items around
the unit.
SAFETY
CONSIDERATIONS
Installing and servicing of heating
equipment can be hazardous due to
oil and electrical components.
Only trained and qualified person-
nel should install, repair, or service
heating equipment.
STARTING YOUR
FURNACE
This appliance is equipped with an
ignition device which automatical-
ly lights the burner each time the
thermostat starts your furnace. Fol-
low these important safe-
guards:
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
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.
!
WARNING
• Combustion air must be clean and attached to the furnace and other
not contaminated with chlorine or safety precautions that may apply.
EXPLOSION HAZARD
Failure to follow this warning
could result in property dam-
age or personal injury or
death.
This furnace is equipped with
a constant type primary igni-
tion system. DO NOT AT-
TEMPT TO LIGHT WITH A
MATCH.
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.
Recognize safety information.
!
This is the safety-alert symbol
.
When you see this symbol on the
furnace and in instructions or man-
uals, be alert to the potential for
personal injury.
Make sure the combustion air for
your furnace does not contain any
of these compounds. During re-
modeling be sure the combustion
air is fresh and uncontaminated. If
air with vapors of these com-
pounds is burned in your furnace,
the heat exchangers and metal vent
system may deteriorate.
Understand the signal words —
DANGER, WARNING, and CAU-
TION. These words are used with
the safety-alert symbol. DANGER
identifies the most serious hazards
which will result in severe personal
injury or death. WARNING signi-
fies hazards which could result in
personal injury or death. CAU-
NOTE: Do not use this furnace if TION is used to identify unsafe
any part has been under water. practices which may result in
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The control CANNOT be reset
from the room thermostat.
!
DANGER
10. Set your thermostat to the tem-
perature that satisfies your com-
fort requirements. SUGGES-
TION: Setting the thermostat
back a few degrees and compen-
sating for the difference with
warmer clothing can make a big
difference in your fuel consump-
tion on extremely cold days. The
few degrees at the top of your
thermostat “comfort level” are
the most costly degrees to obtain.
ELECTRICAL SHOCK HAZ-
ARD HIGH VOLTAGE AT
IGNITER.
Severe electrical shock, per-
sonal injury, or death could
result.
• If a suspected malfunction occurs
with your oil control system, such as
the burner not lighting when it
should, refer to the “Shutting Down
Your Furnace” section and call your
dealer as soon as possible.
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6. Open oil supply valve.
(See Fig. 7.)
When room temperature drops
below temperature selected on
the thermostat, the furnace will
be switched on automatically.
When room temperature reaches
the degree selected on the ther-
mostat, the furnace will be
switched off automatically.
CHECK AIR FILTER: Before
attempting to start your furnace, be
sure the furnace air filter is clean
and in place. See “Performing Rou-
tine Maintenance” section in this
manual. Then proceed as follows:
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, controlled by
the thermostat. In ON mode,
the furnace blower runs contin-
uously. This keeps the tempera-
ture level in your home more
evenly balanced. It also contin-
uously filters indoor air.
STEPS FOR STARTING
YOUR FURNACE
1. Open all warm air registers and
make sure that all return-air
grills are unobstructed.
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7. Check all connections to ensure
there are no leaks.
2. If a humidifier is installed with
your system, open water supply
valve.
8. Set room thermostat to a tem-
perature slightly above room
temperature. This will auto-
matically signal the furnace to
start.
3. Make sure blower access door is
secured in place.
9. When the thermostat calls for
heat, power from the trans-
former energizes the fan control
board. The fan control ener-
gizes the ignition control. The
ignition control will automati-
cally light the burner.
4. Set your room thermostat to
lowest temperature setting.
(See Fig. 5.)
SHUTTING DOWN
YOUR FURNACE
Should you need to shut down your
furnace for service or mainte-
nance, you will need to turn the
furnace off. The following proce-
dures must be followed:
®
The electronic fan control auto-
matically turns on the blower.
The air moved over the heat ex-
changer by the blower is
warmed and passes through the
ducts to the room registers.
1. Set thermostat to lowest setting.
(See Fig. 8.)
®
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5. Turn on electric power to
furnace. (See Fig. 6.)
This unit is equipped with con-
tinuous ignition control. If the
main burner does not ignite
within 30 sec from the call for
heat, the control will lock out.
The red button on top of the
control must be depressed for 3
sec in order to reset the control.
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2. Turn off all electrical power to
the furnace. (See Fig. 9.)
!
!
WARNING
CAUTION
ELECTRICAL SHOCK
HAZARD
Failure to follow this warning
could result in personal inju-
ry or death.
Turn off all electrical power to
furnace before performing
any maintenance or service
on unit.
UNIT DAMAGE HAZARD
Failure to follow this caution
may result in reduced unit
component life.
Never operate your furnace
without the air filters in place.
Doing so may damage the
furnace blower motor. An ac-
cumulation of dust and lint
on internal parts of your
furnace can cause a loss of
efficiency.
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3. Close oil supply valve.
(See Fig. 10).
The air filter is installed in an ex-
ternal filter rack which is provided as
standard equipment with furnace.
To inspect, clean, and/or replace
air filter, follow these steps:
1. Turn off electrical supply to fur-
nace. (See Fig. 11.)
2. Remove filter from external fil-
ter rack.
11
3. Inspect filter. If torn, replace it.
NOTE: If filter has been replaced
with an electronic air cleaner
(EAC), refer to the EAC Owner’s
Manual for maintenance informa-
tion.
!
CAUTION
10
CUT HAZARD
Failure to follow this caution
may result in personal injury.
Although special care has
been taken to minimize sharp
edges, be extremely careful
when handling parts or
reaching into the furnace.
4. If applicable, turn off water sup-
ply to humidifier.
4. If filter is dirty, it must be re-
placed. If your furnace air filter
needs to be replaced, be sure to
use the same size and type of fil-
ter that was originally supplied.
Use furnace filter table for filter
size and filter rack flange dimen-
sions for return air duct.
5. If furnace blower will be neces-
sary for cooling system, remem-
ber to turn electric power back
on when needed for air condi-
tioning.
6. If furnace is being shut down be-
cause of a malfunction, call your
dealer as soon as possible.
FILTERING OUT
TROUBLE
Dirty air filters 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 even-
tually lock out. It is recommended
that furnace air filters be checked
every 3 or 4 weeks and cleaned or
replaced as necessary.
FURNACE AIR FILTERTABLE
ALWAYS KEEP MAIN OIL
VALVE TURNED OFF IF
BURNER IS SHUT DOWN FOR
AN EXTENDED PERIOD OF
TIME.
FLANGE
OPENING
SIZE
FILTER
SIZE
(IN.)
FILTER
TYPE
(IN.)
Model Size 105
16 X 24 X 1
or
16 X 25 X 1
PERFORMING
ROUTINE
MAINTENANCE
With proper maintenance and care,
your furnace will operate economi-
cally and dependably. Instructions
for basic maintenance follow. How-
ever, before beginning maintenance,
follow these safety precautions:
15 X 23
19 X 29
Disposable
Disposable
Model Size 120
18 X 30 X 1
or
20 X 30 X 1
If you have replaced a disposable
filter with a permanent washable
filter, it may be cleaned if it is dirty.
6
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Wash filter in a sink, bathtub, or • Inspect and clean the blower motor supply-air grilles throughout your
outside with a garden hose. Always and wheel.
home. Ensure they are open and
unobstructed.
If problem still exists, call your
dealer for service.
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.
• Inspect and change or clean air fil-
ter if necessary.
• Inspect all supply- and return-air
ducts for obstructions, air leaks, and IF FURNACE FAILS TO
insulation. Remedy any problem OPERATE:
5. Re-install clean air filter.
when necessary.
Follow this checklist step by step,
advancing to the next step only if
furnace fails to start.
• Check thermostat for proper tem-
perature. Is thermostat set above
room temperature?
• Is thermostat set on HEAT?
• Check fuses and circuit breakers.
Is electrical supply on?
• Is valve in oil supply pipe in open
position?
• Is the ignition control on the burn-
er not in lockout? The red button on
top of the control must be depressed
for 3 sec in order to reset the control.
• Inspect the return-air duct connec-
tions at the furnace to ensure it is
physically sound, sealed to the fur-
nace casing, and terminates outside
the space containing the furnace.
• Inspect electrical wiring, connec-
tions, and components for loose
connections.
6. Turn on electrical supply to
furnace.
A CHECK-UP
CHECKLIST
Your furnace represents an impor-
tant investment in your family’s
comfort and your home’s value. To
keep it performing properly and as
a preventative to 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:
• Examine the physical support of
the furnace. Support should be
sound with no cracks, sagging, gaps,
etc. around the base.
• Check furnace for any obvious
signs of deterioration.
• Check for obstructions around the
vent termination.
• Check flue and secondary tube
passage ways including chimney —
clean if necessary.
• Change oil filter.
• Change nozzle.
• Check and adjust combustion and
draft.
• Inspect all vent piping inside struc-
ture for deterioration and vent termi-
nations outside the structure for
blockage.
If furnace still fails to operate, call
your service representative. For
your convenience, record furnace
product and serial numbers on page
2. Should you ever require service,
you will have ready access to the
information needed by your service
representative.
BEFOREYOU 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 filters.
• Check for blocked return-air or
• Check oil pipes leading to and
inside of your furnace for leaks.
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Cancels: New
OM16-16
12-04
© 2004 Bryant Heating & Cooling Systems, 7310 W. Morris St. Indpls, IN 46231
Printed in U.S.A.
Catalog No. 5337-401
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