INSTALLATION INSTRUCTIONS - Lennox

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Page 103/06*2P0306*505,181M*P505181M* 2006 Lennox Industries , Texas, USARETAIN THESE INSTRUCTIONS FOR FUTURE REFERENCEINSTALLATIONINSTRUCTIONSG40UH(X ) SeriesGAS FURNACE505,181M03/2006Supersedes 505,011MTable of ContentsUnit Dimensions2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G40UH(X) Parts Arrangement3. . . . . . . . . . . . . . . . . . . . . G40UH(X) Gas Furnace4. . . . . . . . . . . . . . . . . . . . . . . . . . Shipping and Packing List4. . . . . . . . . . . . . . . . . . . . . . . . Safety Information4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . General5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Combustion, Dilution & Ventilation Air5. . . . . . . . . . . . . . Setting Equipment8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Filters12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Duct System12.

NOTE − G40UH(X) series units should not be installed as a unit heater. The G40UH(X) furnace may be installed in alcoves, clos-ets, attics, basements, garages, and utility rooms in the up-flow or horizontal position. This furnace design has not been CSA International certi-fied for installation in mobile homes, recreational vehicles, or outdoors.

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