11/00
*2P1100*
504,228M
*P504228M*
Page 1
E 2000 Lennox Industries Inc.
Dallas, Texas, USA
INSTALLATION
INSTRUCTIONS
G26 SERIES UNITS
GAS UNITS
504,228M
11/2000
Supersedes 503,885M
Table of Contents
Unit Dimensions 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
G26 Parts Identification 3. . . . . . . . . . . . . . . . . . . . . . . . .
Requirements 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation - Setting Equipment 5. . . . . . . . . . . . . . . . . .
Return Air Opening Guidelines 5. . . . . . . . . . . . . . . . . . .
Filters & Optional Filter Assembly 6. . . . . . . . . . . . . . . .
Duct System 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pipe & Fittings Specifications 7. . . . . . . . . . . . . . . . . . . .
Vent Piping Guidelines 8. . . . . . . . . . . . . . . . . . . . . . . . . .
Joint Cementing Procedure 8. . . . . . . . . . . . . . . . . . . . . .
Venting Practices 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gas Piping 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Unit Start-Up 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gas Pressure Adjustment 21. . . . . . . . . . . . . . . . . . . . . .
High Altitude Information 22. . . . . . . . . . . . . . . . . . . . . . .
Other Unit Adjustments 22. . . . . . . . . . . . . . . . . . . . . . . .
Service 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Repair Parts 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Start-Up & Performance Check List 31. . . . . . . . . . . . . .
RETAIN THESE INSTRUCTIONS
FOR FUTURE REFERENCE
WHAT TO DO IF YOU SMELL GAS:
Do not store or use gasoline or other
flammable vapors and liquids in the viĆ
cinity of this or any other appliance.
Installation and service must be per-
formed by a qualified installer, service
agency or the gas supplier.
D Do not try to light any appliance.
D Do not touch any electrical switch; do not use
any phone in your building.
D Immediately call your gas supplier from a
neighbor's phone. Follow the gas supplier's
instructions.
D If you cannot reach your gas supplier, call the
fire department.
D Extinguish any open flames.
If the information in this manual is not
followed exactly, a fire or explosion
may result causing property damage,
personal injury or death.
WARNING
Litho U.S.A.
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