1053681-UIM-B-0514
6
Johnson Controls Unitary Products
DUCT FLANGES
Four flanges are provided to assist in positioning and attaching duct-
work to the air handler. These flanges are rotated down for shipment. In
order to use the flanges, remove the screw holding an individual flange,
rotate the flange so it is in the upward position, and reinstall the screw.
Repeat this for all 4 flanges.
If the flanges are not used, they must remain in the down position as
shipped.
UNIT CONNECTIONS
There are several ways to handle the supply and return air duct connec-
tions. The location and sizing of the connections depends on the situa-
tion and the method best suited to the installation.
The supply air duct should be properly sized by use of a transition to
match unit opening. Refer to Table 1 for air handler unit inlet and outlet
dimensions.
Ductwork that is not designed to match the supply air opening can
cause turbulence inside the plenum. This turbulence can change the air
flow patterns across the electric heater limit switches. If the factory sug-
gested transition cannot be fabricated, it is recommended that a block
off plate (approximately 8" high and running the full width of the plenum)
be attached to the supply opening. Refer to Figure 9 as a visual aid.
The use of this block off plate will enable better air circulation across the
limit switches.
AIR FILTERS
Return air filters are required and must be field supplied. Filtration can
be accomplished external to the unit or integral filter rack may be used.
A 1" filter access rack has been built into the unit. Remove filter access
cover shown. Install proper size filter. Standard 1" size permanent or
throw away filter may be used, or, permanent washable filters are avail-
able using model numbers: 1PF0601, 602 or 603BK. See Table 2 for fil-
ter size.
.
TXV OR ORIFICE METERING DEVICES
All air handlers are shipped with flex coils, meaning that the evaporator
coil does not have a factory installed metering device, in order to
accommodate a variety of application choices. An R-22 or R-410A TXV
or orifice needs to be installed in the field. Refer to the “Outdoor Unit
Technical Guide” to verify to correct TXV for the AC or HP unit installed.
It is recommended to install the TXV kit prior to brazing line sets.
Refer to the instructions in the installation manuals provided with the
TXV kit and outdoor unit for more information.
Air Handler
Cabinet Size
Dimension
X
H
B
20
46
C
24
52
D
28
57
FIGURE 7:
Horizontal Suspension
FIGURE 8:
Duct Attachment
SUSPENSION SUPPORT LOCATIONS FOR HORIZONTAL APPLICATIONS
X
H
2
1-1/2
MIN. 1-1/2” x 1-1/2”
Angle Recommended
length 26” minimum with
2” clearance on both
sides of Air Handler
Min. 3/8”
Threaded Rod
X
H
2
1-1/2
MIN. 1-1/2” x 1-1/2”
Angle Recommended
length 26” minimum
with 2” clearance on
both sides of
Air Handler
Min. 3/8”
Threaded Rod
FACTORY
INSTALLED
FOR DUCT ATTACHMENT,
IF NEEDED
FIGURE 9:
Ductwork Transition
Use 1/2î screws to connect ductwork to bottom of unit. Longer screws
will pierce the drain pan and cause leakage. If pilot holes are drilled,
drill only though field duct and unit bottom flange.
Equipment should never be operated without filters.
SUGGESTED LOCATION
OF BLOCK OFF PLATE
RECOMMENDED
TRANSITION
