Lennox R-LHF, R-LBF, R-LBR, R-LUF, R-LHR User Manual
USER’S INFORMATION MANUAL
Models: R/LUF, R/LHF, R/LBF, R/LBR, & R/LHR
Oil-Fired Furnaces
If the information in this manual is not follow ed e xactly, a fire or explosion may result causing property
damage, personal injury , or loss of lif e . For assistance or additional information, consult a qualified
installer or service agency .
WARNING
Do not store combustible materials, including gasoline
and other flammable vapors and liquids, near the furnace, vent pipe, or w arm air ducts. The furnace area
must not be used as a broom closet or for any other
storage purposes. Such uses ma y result in actions that
could cause property damage, personal injury, or death.
CAUTION
Never b urn garbage or paper in the heating system and
never lea v e rags, paper, or any flammable items around
the unit.
CAUTION
Installation and service must be performed by a qualified installer or service agency.
WARNING
Congratulations...
...you have one of the most modern oil furnaces made. Your unit
has been carefully selected to keep you warm and comfortable
during the winter months. It will deliver superb performance with
only minimal help from you.
To keep your operating costs low and to eliminate unnecessary
service calls, we have provided a few guidelines to help you
with your furnace. These guidelines will help you understand
how your furnace operates and how to maintain it so you can
get years of safe and dependable ser vice.
For your safety – read before operating
This appliance is equipped with an ignition device which
automatically lights the burner. Do not try to light the burner
by hand.
Do not use this appliance if any part has been under water.
Immediately call a qualified service technician to inspect the
appliance and to replace any part of the control system and oil
control which has been under water.
Periodic Inspections
Your oil furnace is designed to give many years of efficient,
TABLE OF CONTENTS
PERIODIC INSPECTIONS ........................................... 1
OPERA TING Y OUR FURNACE .................................... 2
Lighting Instructions ....................................... 2
Temperature Control....................................... 2
Fan Operation................................................. 2
MAINTENANCE OF YOUR FURNACE......................... 2
Cleaning/Replacing Filters ............................. 2
Combustion/Ventilation Air ............................. 3
Venting and Fur nace Suppor t ........................ 3
WARRANTY.................................................................. 4
# 44886B001 Page 1
Save these instructions for future reference
satisfactory service. However, the varied air pollutants commonly found in most areas can affect longevity and safety.
Chemicals contained in everyday household items such as
laundry detergents, cleaning sprays, hair sprays, deodorizers,
and other products which produce airborne residuals may have
an adverse affect upon the metals used to construct your
furnace.
It is important that you visually inspect the conditions of the
burner and vent from the furnace. A flashlight will be useful for
these inspections. Make one inspection prior to the beginning of
the heating season and another during the middle. Should you
observe unusual amounts of rust, flakes or other deposits,
coatings, or corrosion, it is important that you call your authorized dealer at once to obtain a qualified service inspection.
Even if no unusual rust or other deposits are observed, it is
recommended that the furnace be inspected and serviced
at least once per year by a qualified service technician.
Manufactured By
A.A.C.
A Lennox International Company
421 Monroe Street
Bellevue, OH 44811
Operating Y our Furnace
Lighting Instructions
1. STOP! Read the previous safety information.
2. Set the thermostat to the lowest setting. Turn off electr ic
power to the appliance.
3. This appliance is equipped with an ignition device. Do not
try to light the burner by hand.
4. Check the oil supply valve.
5. Turn on electric power to the appliance.
6. Set the thermostat to the desired setting.
7. The burner should light and the system should be controlled by the thermostat. If the appliance will not operate,
call your service technician.
What to do if your unit is not heating properly
If your unit is operating but fails to provide complete comfort,
check the following before calling for service:
1. Be sure the thermostat setting is correct.
2. Check to see if the filter is clean.
3. Be sure air can circulate freely throughout your home. Do
not block supply registers or return grilles with furniture or
rugs.
And if you also have cooling...
4. Keep surface of the outdoor coil free from dirt, lint, paper,
or leaves.
5. Check and clean indoor coil if necessary. (This check
should be made at the start of each cooling season by your
service technician.)
What to do if your unit fails to operate
1. Be sure the main switch that supplies power to the unit is in
the “ON” position.
2. Replace any burned-out fuses or reset circuit breakers.
3. Be sure the thermostat is properly set.
4. If the unit still does not start, call your service technician.
Temperature Control
There are many types and styles of thermostats. Yours may look
different from the one pictured in Figure 1, depending on the
type of thermostat and whether cooling was installed with the
system. However, almost all thermostats perform the same
basic functions described in the following section.
Thermostat Operation (when you have heating only)
The thermostat is the only control you’ll need to set, as the
furnace is completely automatic. Just set the temperature to the
desired comfort level.
Thermostat Operation (when you have heating and cooling)
There are two switches located on the thermostat. One switch
controls the heating and cooling functions. The other switch is
for “FAN” operation, either continuous or automatic. On the
thermostat is the temperature range for the heating temperature
and the cooling temperature desired.
To put the system into operation, push the switch to either
“HEAT” or “COOL” position.
After you have chosen the type of operation you desire, move
the thermostat dial or lever to select the temperature you would
like the system to maintain
.
Fan Operation
You may wish to increase your comfort by setting your system
for continuous air circulation of the indoor air. The fan switch on
the thermostat permits you to do this (see Figure 1).
With the switch in the “ON” position the fan will operate continuously. “AUTO” position gives fan operation only when the unit is
in either heating or cooling.
Maintenance Of Your Furnace
There are routine maintenance steps you should take to keep
your unit operating efficiently. This will assure longer life, lower
operating costs, and fewer ser vice calls. The steps given in this
publication are easy to follow and are not time consuming.
Certain service and maintenance procedures require the skill of
a trained service person who has specialized tools and training
for their use. Please call your dealer for service. Personal
injury can result if you are not qualified to do this work.
Cleaning/Replacing the Filter
WARNING
Always turn off the power to y our furnace before remo ving the doors or filters. Failure to turn the power off could
result in property damage, personal injury, or death.
Thermostat
F
A
70
60
50
80
Fan SwitchSelector Switch
N
O
N
A
U
T
O
It is very important to clean or replace the air filter regularly. A
dirty air filter can sharply increase the operational costs of your
unit...in some cases it can double the cost. The air filter should
be inspected at least every 6 weeks and cleaned or replaced as required.
The unit may contain either a disposable filter or a permanent
filter. The type of filter may be indicated on a label attached to
the filter. If a disposable filter is provided, replace with the same
type and size as the original filter. If a permanent filter is
Room
Temperature
50
60
80
70
Cooling
(if applicable)
&
Heating
Temperature
Setting
provided, clean filter and place back in furnace. To clean a
permanent filter, shake filter to remove excess dirt and/or use a
vacuum cleaner. Wash filter in soap or detergent water and
replace after filter is dry.
If your air distribution system has a central return air filter-grille,
you do not need a filter in your furnace. Be sure to clean the
filter-grille as recommended above.
Figure 1
Dirty filters are the most common cause of inadequate heating
or cooling performance. A clogged filter will not permit adequate
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