Filter
Top Products
503,613M
*P504613M*
08/05
*2P0805*
PRODUCT LITERATURE
E2005 Lennox Industries Inc.
Dallas, Texas
RETAIN THESE INSTRUCTIONS
FOR FUTURE REFERENCE
INSTALLATION
INSTRUCTIONS
G24-200
UPFLOW GAS FURNACE
Direct Spark Ignition
503,613M
8/2005
Supersedes 7/2003
Table of Contents
G24−200 Unit Dimensions 2. . . . . . . . . . . . . . . . . . . . . .
G24−200 Parts Arrangement 4. . . . . . . . . . . . . . . . . . . .
G24−200 Gas Furnace 6. . . . . . . . . . . . . . . . . . . . . . . . .
Shipping and Packing List 6. . . . . . . . . . . . . . . . . . . . . .
Safety 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Combustion, Dilution & Ventilation Air 8. . . . . . . . . . . .
Setting Equipment 11. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Return Air Plenum / Filter Box Installation 11. . . . . . . .
Duct System 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Blower Motor and Drive Installation 13. . . . . . . . . . . . .
Venting 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gas Piping 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Unit Start−up 33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Heating Sequence of Operation 34. . . . . . . . . . . . . . . .
Gas Pressure Adjustment 35. . . . . . . . . . . . . . . . . . . . .
High Altitude Information 35. . . . . . . . . . . . . . . . . . . . . .
Other Unit Adjustments and Operation 35. . . . . . . . . . .
Setting Blower CFM 37. . . . . . . . . . . . . . . . . . . . . . . . . .
Repair Parts List 39. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
G24−200 Start−up & Performance Check List 39. . . . .
Troubleshooting 40. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Do not store or use gasoline or other
flammable vapors and liquids in the
vicinity of this or any other appliance.
Installation and service must be per-
formed by a qualified installer, ser-
vice agency or the gas supplier.
WHAT TO DO IF YOU SMELL GAS:
S Do not try to light any appliance.
S Extinguish any open flame.
S Do not touch any electrical switch; do not
use any phone in your building.
S Immediately call your gas supplier from a
neighbor’s phone. Follow the gas suppli-
er’s instructions.
S If you cannot reach your gas supplier, call
the fire department.
S Leave the building immediately.
FIRE OR EXPLOSION HAZARD.
Failure to follow safety warnings exact-
ly could result in serious injury, death,
or property damage.
WARNING
Litho USA