440 01 4300 00 21
Specifications subject to change without notice.
Figure 23
Furnace, Plenum, and Subbase
Installed on a Combustible Floor
A96285
HORIZONTAL INSTALLATION
NOTE: The furnace must be pitched forward as shown in
Figure 18 for proper condensate drainage.
! WARNING
FIRE, EXPLOSION, AND CARBON MONOXIDE POISONING
HAZARD
Failure to follow this warning could result in personal injury,
death, or property damage.
Do not install the furnace on its back or hang furnace with
control compartment facing downward. Safety control
operation will be adversely affected. Never connect return−air
ducts to the back of the furnace.
! CAUTION
MINOR PROPERTY HAZARD
Failure to follow this caution may result in minor property
damage.
Local codes may require a drain pan under entire furnace and
condensate trap when a condensing furnace is used in an attic
application or over a finished ceiling.
The furnace can be installed horizontally in an attic or
crawlspace on either the left−hand (LH) or right−hand (RH)
side. The furnace can be hung from floor joists, rafters or
trusses or installed on a non−combustible platform, blocks,
bricks or pad.
Figure 24
Furnace, Plenum, and Coil
Assembly on a Combustible Floor
L11F104
EAM4X, END4X, ENW4X
! WARNING
FIRE, EXPLOSION, AND CARBON MONOXIDE POISONING
HAZARD
Failure to follow this warning could result in personal injury,
death, or property damage.
Do not install the furnace on its back or hang furnace with
control compartment facing downward. Safety control
operation will be adversely affected. Never connect return−air
ducts to the back of the furnace.
Suspended Furnace Support
The furnace may be supported under the entire length of the
furnace with threaded rod and angle iron. (See Figure 25)
Secure angle iron to bottom of furnace as shown.
Platform Furnace Support
Construct working platform at location where all required
furnace clearances are met. (See Table 1 and Figure 26) For
furnaces with 1−in. (25 mm) clearance requirement on side, set
furnace on non−combustible blocks, bricks or angle iron. For
crawlspace installations, if the furnace is not suspended from
the floor joists, the ground underneath furnace must be level
and the furnace set on blocks or bricks.
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