9
Upflow furnaces are shipped with a
bottom closure panel installed. When
bottom return air is used, remove the
panel by removing the two screws
attaching the panel to the front base
angle. See filter section for details.
COMBUSTIBLE MATERIAL MUST
NOT BE PLACED ON OR AGAINST
THE FURNACE JACKET. THE AREA
AROUND THE FURNACE MUST BE
KEPT CLEAR AND FREE OF ALL
COMBUSTIBLE MATERIALS
INCLUDING GASOLINE AND
OTHER FLAMMABLE VAPORS AND
LIQUIDS. PLACEMENT OF
COMBUSTIBLE MATERIALS ON,
AGAINST OR AROUND THE
FURNACE JACKET CAN CAUSE AN
EXPLOSION OR FIRE RESULTING
IN PROPERTY DAMAGE,
PERSONAL INJURY OR DEATH.
THE HOMEOWNER SHOULD BE
CAUTIONED THAT THE FURNACE
AREA MUST NOT BE USED AS A
BROOM CLOSET OR FOR ANY
OTHER STORAGE PURPOSES.
CLEARANCE -
ACCESSIBILITY
The design of forced air furnaces with
input ratings as listed in the table
under Figure 5 are certified by CSA-
International for the clearances to
combustible materials shown in
inches.
See name/rating plate and clearance
label for specific model number and
c
learance information.
Service clearance of at least 24
inches is recommended in front of
all furnaces.
NOTE: Use recommended 24”
clearance if accessibility clearances
are greater than fire protection
clearances.
UPFLOW FURNACES ARE DESIGN-
CERTIFIED FOR INSTALLATION
ON COMBUSTIBLE FLOORS.
NOTE, HOWEVER, THAT
FURNACES MUST NOT BE
INSTALLED DIRECTLY ON
CARPETING, TILE OR OTHER
COMBUSTIBLE MATERIAL OTHER
THAN WOOD FLOORING.
INSTALLATION ON A
COMBUSTIBLE MATERIAL CAN
RESULT IN FIRE, CAUSING
PROPERTY DAMAGE, PERSONAL
INJURY OR DEATH.
!
WARNING
THIS FURNACE IS NOT
APPROVED OR RECOMMENDED
FOR INSTALLATION ON ITS BACK,
WITH ACCESS DOORS FACING
UPWARDS OR IN ANY
H
ORIZONTAL CONFIGURATION.
SITE SELECTION
1. Select a site in the building near
t
he center of the proposed, or
existing, duct system.
2. Give consideration to the vent
system piping when selecting the
furnace location. Be sure the
venting system can get from the
furnace to the termination with
minimal length and elbows.
3. Locate the furnace near the
existing gas piping. Or, if running
a new gas line, locate the
furnace to minimize the length
and elbows in the gas piping.
4. Locate the furnace to maintain
proper clearance to combustibles
as shown in the following tables.
DO NOT LIFT THE UNIT BY THE
HEAT EXCHANGER TUBES. DOING
SO CAN DAMAGE THE HEAT
EXCHANGER ASSEMBLY.
!
WARNING
CAUTION
!
!
WARNING
FIGURE 4
HORIZONTAL FURNACE INSTALLED W/SUPPORT BRACKETS
GAS
PIPE
TRAP
EXHAUST
FAN
ELECTRICAL
CONDUIT
INTAKE
VENT
I522
AIRF
LOW
NOTE: Do not block furnace access with support rods. Maintain clearances recommended in Figure
7. Allow enough space for proper service maintenance or replacement of the heat exchanger and
blower assembly.
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