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
