5532522-UIM-B-0619
Johnson Controls Ducted Systems
5
RESIDENTIAL AND MODULAR HOME UPFLOW
RETURN PLENUM CONNECTION
Return air may enter the furnace through the side(s) or bottom depend-
ing on the type of application. Return air may not be connected into the
rear panel of the unit.
SIDE RETURN APPLICATION
Side return applications pull return air through an opening cut in the
side of the furnace casing. This furnace is supplied with a bottom block-
off panel that should be left in place if a side return is to be used. If the
furnace is to be installed on a flat, solid surface, this bottom panel will
provide an adequate seal to prevent air leakage through the unused
bottom opening. However, if the furnace is to be installed on a surface
that is uneven, or if it is to be installed on blocks or otherwise raised off
the floor,
it will be necessary to seal the edges of the bottom panel
to the casing using tape or other appropriate gasket material to
prevent air leakage.
BOTTOM RETURN AND ATTIC INSTALLATIONS
Bottom return applications normally pull return air through a base plat-
form or return air plenum. Be sure the return platform structure or return
air plenum is suitable to support the weight of the furnace.
The internal bottom panel must be removed for this application.
Attic installations must meet all minimum clearances to combustibles
and have floor support with required service accessibility.
HORIZONTAL APPLICATION
ATTIC INSTALLATION
This appliance is certified for line contact when the furnace is installed
in the horizontal left or right position. The line contact is only permissible
between lines that are formed by the intersection of the top and two
sides of the furnace and the building joists, studs or framing. This line
may be in contact with combustible material. Refer to Figure 4.
FIGURE 2:
Furnace and Coil Attachment
A1107-001
NOTE:
Verify that all drains
are trapped or plugged.
UPFLOW
APPLICATION
PRIMARY DRAIN
TRAP CONNECTION
SECONDARY DRAIN
TRAP CONNECTION
DRAIN PLUG
FOR HORIZONTAL
SECONDARY DRAIN
PRIMARY DRAIN
TRAP CONNECTION
COIL
COIL
RIGHT FLOW
APPLICATION
LEFT FLOW
APPLICATION
COIL
DRAIN PLUG
FOR VERTICAL
SECONDARY DRAIN
FURNACE
FURNACE
FURNACE
FIGURE 3:
Horizontal Application
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IMPORTANT:
This furnace may be installed in a horizontal position
on either side as shown above.
It must not be installed on its back.
FIGURE 4:
Typical Attic Installation
IMPORTANT: During installation, doors should remain on the
furnace when moving or lifting.
WARNING
When a furnace is installed in an attic or other insulated space, keep
all insulating materials at least 12 inches (30.5 cm) away from furnace
and burner combustion air openings.
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