This furnace design has not been CSA international certi- fied for installation in mobile homes, recreational vehicles, or outdoors.
WARNING
The blower access panel must be securely in place when the blower and burners are operating. Gas fumes, which could contain carbon monoxide, can be drawn into living space resulting in personal inju- ry or death.
General
These instructions are intended as a general guide and do not supersede local codes in any way. Consult authorities having jurisdiction before installation.
In addition to the requirements indicated previously, the fol- lowing general recommendations should be considered when installing the Lennox G24−200 furnace.
The furnace should be placed as close to the center of the air distribution system as possible. The furnace should also be located close to the chimney or vent termination point.
Do not install the furnace where drafts might blow directly into it. This could cause improper combustion and unsafe operation.
Do not block furnace combustion air openings with cloth- ing, boxes, doors, etc. Combustion air is needed for proper combustion and safe unit operation.
When the furnace is installed in an attic or other insulated space, keep insulation away from the furnace.
WARNING
Product contains fiberglass wool.
Disturbing the insulation in this product during installation, maintenance, or repair will expose you to fiberglass wool. Breathing this may cause lung cancer. (Fiberglass wool is known to the State of Cal- ifornia to cause cancer.)
Fiberglass wool may also cause respiratory, skin, and eye irritation.
To reduce exposure to this substance or for further information, consult material safety data sheets available from address shown below, or contact your supervisor.
Lennox Industries Inc.
P.O. Box 799900
Dallas, TX 75379−9900 USA
Combustion, Dilution & Ventilation Air
In the past, there was no problem in bringing in sufficient outdoor air for combustion. Infiltration provided all the air that was needed. In today’s homes, tight construction practices make it necessary to bring in air from outside for combustion. Take into account that exhaust fans, ap- pliance vents, chimneys, and fireplaces force additional air that could be used for combustion out of the house. Un- less outside air is brought into the house for combustion, negative pressure (outside pressure is greater than inside pressure) will build to the point that a downdraft can occur in the furnace vent pipe or chimney. As a result, combus- tion gases enter the living space creating a potentially dangerous situation.
In the absence of local codes concerning air for combus- tion and ventilation, use the guidelines and procedures in this section to install G24−200 furnaces to ensure efficient and safe operation. You must consider combustion air needs and requirements for exhaust vents and gas piping. A portion of this information has been reprinted with per- mission from the National Fuel Gas Code
In Canada, refer to the standard CSA B149.1 installation code.
CAUTION
Do not install furnace in a corrosive or contaminated atmosphere. Meet all combustion and ventilation air requirements, as well as all local codes.
Combustion Air Requirements
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