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INSTALLATION INSTRUCTIONS
Furnace, Plenum, and Subbase
Figure 25
Installed on a Combustible Floor
Furnace, Plenum, and Coil
Figure 26
Assembly on a Combustible Floor
EAM4X, END4X, ENW4X
Bottom Return Air Inlet
These furnaces are shipped with bottom closure panel installed
in bottom return--air opening. Remove and discard this panel
when bottom return air is used. To remove bottom closure
panel, see Figure 20 and Figure 21.
24
HORIZONTAL INSTALLATION
NOTE:
The furnace must be pitched forward as shown in
Figure 19 for proper condensate drainage.
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.
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
A96285
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.
Suspended Furnace Support
The furnace may be supported under the entire length of the
furnace with threaded rod and angle iron. (See Figure 27)
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 28) 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.
Roll- -Out Protection
Provide a minimum 12--in. x 22--in. (305 x 559 mm) piece of
sheet metal for flame roll--out protection in front of burner area
for furnaces closer than 12--in. (305 mm) above the
combustible deck or suspended furnaces closer than 12--in.
(305mm) to joists. The sheet metal MUST extend underneath
L11F104
the furnace casing by 1--in. (25mm) with the door removed.
The bottom closure panel may be used for flame roll--out
protection when bottom of furnace is used for return air
connection. See Figure 28 for proper orientation of roll--out
shield.
Specifications subject to change without notice.
Gas Furnace: N9MSB
WARNING
!
CAUTION
!
440 01 4104 07
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