Lennox International Inc. R/LBR - Manual (Page 2)

Page 2 # 44886B001
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 continu-
ously. “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 service 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
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 re-
placed 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
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.
Dirty filters are the most common cause of inadequate heating
or cooling performance. A clogged filter will not permit adequate
Operating Your Furnace
Lighting Instructions
1. STOP! Read the previous safety information.
2. Set the thermostat to the lowest setting. Turn off electric
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 con-
trolled 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
Figure 1
FA
N
ON
A
U
T
O
Fan Switch Selector Switch
Cooling
(if applicable)
&
Heating
Temperature
Setting
Room
Temperature
50
60
80
70
60
50
70
80
Always turn off the power to your furnace before remov-
ing the doors or filters. Failure to turn the power off could
result in property damage, personal injury, or death.
WARNING