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506526-01 Page 1 of 39Issue 1031
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
This manual must be left with the homeowner for future reference.
INSTALLATION INSTRUCTIONS
A80UH & 80G1UH
Warm Air Gas Furnace
Upflow / Horizontal Left and Right Air Discharge
*506526-01*
TABLE OF CONTENTS
Unit Dimensions ............................................................ 2
A80UH & 80G1UH Parts Arrangement ......................... 3
A80UH & 80G1UH 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 ........................................................................ 13
Gas Piping .................................................................. 23
Electrical ..................................................................... 25
Unit Start-Up ............................................................... 29
Heating Sequence of Operation ................................. 30
Gas Pressure Adjustment ........................................... 31
High Altitude ................................................................ 31
Other Unit Adjustments ............................................... 31
Service ........................................................................ 33
Planned Service .......................................................... 36
Integrated Control Diagnostic Codes .......................... 36
Repair Parts List ......................................................... 37