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Figure 3
Multipoise Orientations
THE BLOWER IS LOCATED
TO THE RIGHT OF THE
BURNER SECTION, AND
CONDITIONED AIR IS
DISCHARGED TO THE LEFT.
THE BLOWER IS
LOCATED ABOVE THE
BURNER SECTION, AND
CONDITIONED AIR IS
DISCHARGED DOWNWARD.
WARNING
!
FIRE, INJURY OR DEATH HAZARD
Failure to follow this warning could result in personal injury,
death and/or property damage.
When the furnace is installed in a residential garage, the burn-
ers and ignition sources must be located at least 18−in. (457
mm) above the floor. The furnace must be located or protected
to avoid damage by vehicles. When the furnace is installed in
a public garage, airplane hangar, or other building having a haz-
ardous atmosphere, the furnace must be installed in accord-
ance with the NFPA 54/ANSI Z223.1−2009 or CAN/CSA
B149.1−2010. (See Figure 4)
Figure 4
Installation in a Garage
WARNING
!
FIRE HAZARD
Failure to follow this warning could result in personal injury,
death and/or property damage.
Do not install the furnace on its back or hang furnace with con-
trol compartment facing downward. Safety control operation will
be adversely affected. Never connect return−air ducts to the
back of the furnace. (See Figure 5)
8
Figure 5
Location Relative to Cooling
Equipment
The cooling coil must be installed parallel with, or on the
downstream side of the unit to avoid condensation in the heat
exchangers. When installed parallel with the furnace, dampers
or other flow control must prevent chilled air from entering the
furnace. If the dampers are manually operated, they must be
A93044
equipped with means to prevent operation of either unit unless
the damper is in the full−heat or full−cool position.
Air for Combustion and
Ventilation
Introduction
Direct Vent (2−Pipe) Applications
When the furnace is installed as a direct vent (2-pipe) furnace,
no special provisions for air for combustion are required.
However, other gas appliances installed in the space with the
furnace may require outside air for combustion. Follow the
guidelines below to insure that other gas appliances have
sufficient air for combustion.
Specifications subject to change without notice.
THE BLOWER IS
LOCATED BELOW THE
BURNER SECTION, AND
CONDITIONED AIR IS
DISCHARGED UPWARD.
OF THE BURNER SECTION,
AND CONDITIONED AIR IS
DISCHARGED TO THE RIGHT.
Prohibited Installations
BACK POSITIONED
DOWNWARD
BACK POSITIONED
UPWARD
THE BLOWER IS
LOCATED TO THE LEFT
L12F010
AIR
RETURN
CUT IN
BACK
L12F011
440 01 4201 03
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