Bryant Furnace 374RAN User Manual

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.  
 
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.  
9
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.  
11  
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
 
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  
4
4
 
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.  
6
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.  
7
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.)  
®
5
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.  
8
5
 
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.  
9
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
 
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.  
7
 
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  
8
 

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