Lennox International Inc R/LHR Operating Your Furnace, Maintenance Of Your Furnace, Thermostat

Models: R/LBF R/LHF R/LHR R/LUF R/LBR

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Operating Your Furnace

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

 

Selector Switch

 

Fan Switch

 

F

 

 

A

 

 

N

O

 

 

N

60

70

A

U

T

50

80

O

 

 

50

80

Cooling

(if applicable)

60

70

 

 

&

Room

 

Heating

 

Temperature

Temperature

 

 

Setting

 

 

Figure 1

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

Lighting InstructionsWhat to do if your unit is not heating properly WARNING

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.

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

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Lennox International Inc R/LHR Operating Your Furnace, Maintenance Of Your Furnace, Lighting Instructions, Thermostat