Page 1
04/13
*2P0413*
507104-01
*P507104-01*
P.O. Box 799900, Dallas, TX 75379-9900
INSTALLATION INSTRUCTIONS
80AF1UH
Warm Air Gas Furnaces
Upflow/Horizontal Left and Right Air Discharge
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.
This manual must be left with the homeowner for future reference.
CAUTION
As with any mechanical equipment, personal injury
can result from contact with sharp sheet metal
edges. Be careful when you handle this equipment.
WARNING
Improper installation, adjustment, alteration, service
or maintenance can cause property damage, person
al injury or loss of life. Installation and service must
be performed by a licensed professional HVAC in
staller (or equivalent), service agency or the gas sup
plier.
TABLE OF CONTENTS
Unit Dimensions 2................................
80AF1UH Gas Furnace 3..........................
Shipping and Packing List 3........................
Safety Information 3...............................
Use of Furnace as a Construction Heater 4...........
General 4........................................
Combustion, Dilution & Ventilation Air 5..............
Setting Equipment 8...............................
Filters 11..........................................
Duct System 11....................................
Venting 12........................................
Gas Piping 19.....................................
Electrical 21.......................................
Integrated Control 24...............................
Unit Start-Up 25...................................
Gas Pressure Adjustment 26........................
High Altitude 26....................................
Proper Combustion 26..............................
Other Unit Adjustments 27..........................
Service 28........................................
Twinning the 80AF1UH Furnace 29...................
Repair Parts List 30................................
Start-Up and Performance Checklist 31...............
Supersedes 07/2012
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