5724452-UIM-A-0619
Johnson Controls Ducted Systems
3
CLEARANCES
Clearances must be taken into consideration, and provided for as
follows:
•
Maintenance and servicing access - minimum 36” from front of
unit recommended for blower motor / coil replacement.
•
The duct work connected to this unit is designed for zero clear-
ance to combustible materials.
•
A combustible floor base accessory is available for downflow
applications of this unit, if required by local code.
LOCATION
Location is usually predetermined. Check with owner’s or dealer’s
installation plans. If location has not been decided, consider the
following in choosing a suitable location:
•
Select a location with adequate structural support, space for ser-
vice access, and clearance for air return and supply duct connec-
tions.
•
Using hanging brackets to wall mount this single piece air handler
unit is not recommended.
•
Normal operating sound levels may be objectionable if the air
handler is placed directly over certain rooms, for example, a bed-
room or a study.
•
If using the air handler unit with an indoor coil, select a location
that permits installation of the condensate line to an open drain or
outdoors, allowing condensate to drain away from the structure.
•
When an indoor coil is installed in an attic or above a finished
ceiling, an auxiliary drain pan must be provided under the air han-
dler as specified by most local building codes.
•
Proper electrical supply must be available.
•
If unit is located in an area of high humidity (that is, an uncondi-
tioned garage or attic), nuisance sweating of casing may occur.
On these installations, unit duct connections and other openings
must be properly sealed, and a wrap of 2” fiberglass insulation
with vinyl vapor barrier must be used.
AIR HANDLER CONFIGURATION
These air handler units are supplied ready to be installed in an upflow,
downflow, horizontal right or horizontal left position. Refer to Figure 2.
The unit requires no conversion procedures.
AIR HANDLER AND COIL UPFLOW, DOWNFLOW,
AND HORIZONTAL POSTIONS
1.
Apply neoprene gasket to the return air end of air handler.
2.
Attach three tie plates to external sides and back of air handler
casing using screws. Refer to Figure 3.
3.
Position blower casing over appropriate coil opening (depending
on configuration). Refer to Figure 2.
4.
Attach the three tie plates to coil casing using screws. Refer to Fig-
ure 3.
5.
Remove coil access panel and coil filter door.
6.
Slide the coil out of the coil cabinet, and set coil to the side.
7.
Locate 2” wide foam gasket.
8.
Apply foam gasket over the air handler and coil mating seams on
the interior of both unit sides and back.
Refer to Figure 4.
9.
Slide the coil into the housing, and install the coil access panel and
coil filter door.
NOTICE
The primary and secondary drain line must be trapped to allow proper
drainage of condensate water. The secondary drain line should be
piped to a location that will give the occupant a visual warning that the
primary drain is clogged. If the secondary drain line is not used, it
must be capped.
FIGURE 2:
Typical Installation
FIGURE 3:
Coil and Air Handler Attachment Details
A
0
346-
001
UPFL
O
W
D
O
WNFL
O
W
H
O
RIZ
O
NTAL RIGHT
HEA
T
H
O
RIZ
O
NTAL LEFT
HEAT
HEAT
HEA
T
HEA
T
A
0
347-
001
O
UTER TIE PLATE (3 PLA
C
E
S
)
AIR
HANDLER
CO
IL
N
O
TE:
Ex
terna
l
tie
pl
ates
are
insta
ll
ed
o
n
bo
t
h
sides
and
t
h
e
b
a
ck
