268882-UIM-A-0407
6
Unitary Products Group
Downflow Air Conditioning Coil Cabinet
The Cooling Coil Cabinet can be used in place of the combustible floor
base for downflow installations on combustible materials. The furnace
should be installed with the cooling coil cabinet specifically intended for
downflow applications. The cooling coil cabinet must be secured to the
floor. A supply air duct plenum is installed through the opening pro-
vided. The supply air duct is then secured to the duct system with
screws and sealed to prevent leaks. If a matching cooling coil is used, it
may be connected directly to the furnace outlet using the accessory
transition kit and sealed to prevent leakage. The transition kit must be
used to secure the cooling coil cabinet to the furnace casing when
installed in a downflow configuration.
NOTE:
The model 9155 Coil cabinet does not require the use of an
accessory transition kit. It may be connected directly to the furnace out-
let.
The transition kit (when used) may be installed in one of two ways. The
transition kit may be installed and secured to either the furnace or the
cooling coil cabinet by the use of screws and then it must be sealed to
prevent leaks.
•
If the transition kit has been installed on the cooling coil cabinet it
must be secured to the cooling coil cabinet with screws. The sup-
ply air side of the furnace is then placed on the cooling coil cabi-
net and secured to the transition kit.
•
If the transition kit has been installed on the supply air side of the
furnace it must be secured to the furnace with screws. The fur-
nace and the transition kit are then placed on the cooling coil cab-
inet and secured with screws.
IMPORTANT:
The furnace, transition kit (when used), and the cooling
coil cabinet MUST BE SEALED as needed to prevent leaks, AND
SECURED. Refer to the assembly drawing in Figure 2.
IMPORTANT:
On all installations without a coil, a removable access
panel is recommended in the outlet duct such that smoke or reflected
light would be observable inside the casing to indicate the presence of
leaks in the heat exchanger. This access cover shall be attached in
such a manner as to prevent leaks.
Attachment to Structure
A furnace for installation in a manufactured (mobile) home must be
securely attached to the building structure. The perforated strap sup-
plied with the furnace may be used for that purpose. Refer to Figure 3.
BLEND AIR INSTALLATIONS
This bracket is to be used only for Alcove application on the 90% Gas
Furnaces. It helps in installation of Blend Air Damper Tube close to the
furnace. It is recommended that the Blend Air be installed with the help
of this bracket as close to the furnace as possible. The Blend Air
Bracket Assembly should be installed no higher than 18 inches above
the furnace. See Figure 4.
FIGURE 2:
Transition Kit Assembly
AIRFLOW
AIRFLOW
AIRFLOW
AIRFLOW
DOWNFLOW
FURNACE
TRANSITION KIT
(if needed)
TRANSITION KIT
(if needed)
COOLING
COIL
CABINET
REFRIGERANT
LINES
DRAIN
CONNECTIONS
FIGURE 3:
Attachment to Structure
FIGURE 4:
Blend Air Bracket
TIE DOWN
PERFORATED
STRAP
ATTACH
TO WALL STUD
WITH A NAIL
OR SCREW
ATTACH TO
FURNACE WITH
SCREW
COMBUSTION
AIR PIPE
VENT
PIPE
VENT
PIPE
VENT
DRAIN
W
ALL
WA
L
L
SUPPLY AIR DUCT
COMBUSTION
AIR PIPE
SCREW x2
BLEND AIR
BRACKET
18”
MAX.
9155-7171
FILTER KIT
90%
GAS
FURNACE
