506528-01
Page 1 of 37
Issue 1035
This is a safety alert symbol and should never be ignored. When you see this symbol on labels or in
manuals, be alert to the potential for personal injury or death.
As with any mechanical equipment, personal injury can
result from contact with sharp sheet metal edges. Be
careful when you handle this equipment.
CAUTION
Improper installation, adjustment, alteration, service or
maintenance can cause property damage, personal injury
or loss of life. Installation and service must be performed
by a licensed professional installer (or equivalent), service
agency or the gas supplier.
WARNING
Manufactured By
Allied Air Enterprises, Inc.
A Lennox International, Inc. Company
215 Metropolitan Drive
West Columbia, SC 29170
Unit Dimensions ............................................................ 2
A80DF & 80G1DF Parts Arrangement .......................... 3
A80DF & 80G1DF Gas Furnace ................................... 4
Shipping and Packing List ............................................ 4
Safety Information ......................................................... 4
Use of Furnace as a Construction Heater .................... 5
General ......................................................................... 6
Combustion, Dilution, Ventilation Air ............................. 6
Setting Equipment ........................................................ 9
Filters .......................................................................... 12
Duct System ................................................................ 12
Venting ........................................................................ 12
Gas Piping .................................................................. 21
TABLE OF CONTENTS
Electrical ..................................................................... 22
Unit Start-Up ............................................................... 27
Heating Sequence of Operation ................................. 28
Gas Pressure Adjustment ........................................... 28
Control Settings .......................................................... 28
High Altitude ................................................................ 29
Other Unit Adjustments ............................................... 29
Service ........................................................................ 31
Planned Service .......................................................... 34
Control Diagnostic Codes ........................................... 34
Troubleshooting .......................................................... 34
Repair Parts List ......................................................... 35
*506528-01*
This manual must be left with the homeowner for future reference.
INSTALLATION INSTRUCTIONS
A80DF & 80G1DF
Warm Air Gas Furnace
Downflow Air Discharge
