Lennox International Inc. F8AUH User Manual
1
1999
45,000 to 120,000 Btuh (13.2 to 35.2 kW) Heating Capacity
1 through 5 Tons (3.5 to 17.6 kW) Add-On Cooling
F8AUH
Gas Furnaces – Up-Flow / Horizontal
User’s Information Manual
RETAIN THESE INSTRUCTIONS
FOR FUTURE REFERENCE
503,995M
06/99
Supersedes 05/99
Table of Contents
Important Directions
2
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Venting System Inspection
5
. . . . . . . . . . . . . . . . . . . . .
Lighting Information and Operation
3
. . . . . . . . . . . . . .
Flame Rollout Safety Switches
5
. . . . . . . . . . . . . . . . . .
Filters
4
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Safety Reminder
5
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Blower
5
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Safety Precautions
5
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Burner Flame
5
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Planned Service
6
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Model Number Identification
Additive Cooling (Nominal)
18 - 1.5 Ton ( kW)
24 - 2 Ton ( kW)
30 - 2.5 Ton ( kW)
36 - 3 Ton ( kW)
42 - 3.5 Ton ( kW)
48 - 4 Ton ( kW)
60 - 5 Ton ( kW)
Generation
AFUE
8 - 80%
9 - 90%
Furnace
Cabinet Color
L - Beige
G - Gray
B - Brown
R - Green
S - Silver
Door Color
L - Beige
G - Gray
B - Brown
R - Green
S - Silver
Btuh Input (kW)
045 - 45,000 (13.2)
060 - 60,000 (17.6)
075 - 75,000 (22.0)
100 - 100,000 (29.3)
120 - 120,000 (35.1)
NOTE - Shaded area denotes part of
model no. referenced in publication.
Gas Valve
2 - Two Stage Valve
Blank Ć Single Stage Valve
Blower Motor
V - Variable Speed Motor
Blank - MultiĆSpeed Motor
Options
X - Low NO
x
P - LPG/Propane Gas
S - Stainless Steel Heat Exchanger
Z - Stainless Steel Heat Exchanger/Low NO
x
Blank - No options
Configuration
UF - Up-Flow
DF - Down-Flow
HZ - Horizontal
MP- Multi-Position
DH- Downflow/Horizontal
UH- Up-Flow/Horizontal
V
–24
*
F
A
8
*
UH
X
–045
2
WHAT TO DO IF YOU SMELL GAS:
If the information in this manual is not
followed exactly, a fire or explosion
may result causing property damage,
personal injury or death.
WARNING
Do not store or use gasoline or othĆ
er flammable vapors and liquids in
the vicinity of this or any other apĆ
pliance.
Installation and service must be
Installation and service must be
performed by a qualified installer,
service agency or the gas supplier.
Do not try to light any appliance.
Do not touch any electrical switch; do not
use any phone in your building.
Immediately call your gas supplier from a
neighbor's phone. Follow the gas suppliĆ
er's instructions.
If you cannot reach your gas supplier, call
the fire department.
Extinguish any open flames.
FBR 113270