1053681-UIM-B-0514
Johnson Controls Unitary Products
5
HORIZONTAL LEFT CONVERSION
1. With air handler in vertical position remove all access panels and
the tubing connection panel.
2. Slide the coil assembly out of the air handler.
3. It would be easiest to remove and reposition the condensate deflec-
tor now, while you have the coil assembly removed from the unit.
4. Rotate air handler 180° so the blower outlet is facing down.
5. Reinstall the coil assembly on the coil support brackets.
6. Reattach tubing connection panel.
7. Reposition the air handler into the left hand horizontal application.
8. Remove the drain pan plugs from the horizontal drain pan and
screw them into the vertical, A-coil drain pan.
9. Reattach access panels.
DOWNFLOW CONVERSION
A downflow floor base is available for this air handler. Refer to instruc-
tions supplied with the kit for installation.
1. With air handler in vertical position remove all access panels and
the tubing connection panel.
2. Slide the coil assembly out of the air handler.
3. Rotate air handler 180° so the blower outlet is facing down.
4. Reinstall the coil assembly on the coil support brackets.
5. Reattach tubing connection panel.
6. Reattach access panels.
SECTION IV: DUCTWORK AND
CONNECTIONS
The vast majority of problems encountered with heating and cooling
systems can be linked to improperly designed or installed duct systems.
It is therefore highly important to the success of an installation that the
duct system be properly designed and installed.
When installing a central air return grille in or near the living space, it is
advisable to design the ductwork so that the grille is not in direct line
with the opening in the unit. One or two elbows and acoustical duct liner
will also assure a quieter installation and system. Where return air duct
is short, or where sound may be a problem, sound absorbing glass fiber
should be used inside the duct.
Insulation of duct work is a must where it runs through an unheated
space during the heating season or through an uncooled space during
the cooling season. The use of a vapor barrier is recommended to pre-
vent absorption of moisture from the surrounding air into the insulation.
Duct work should be fabricated and installed in accordance with local
and/or national codes. This includes the standards of the National Fire
Protection Association for Installation of Air-Conditioning and Ventilat-
ing Systems, NFPA No. 90B. They should be sized in accordance with
National Environmental System Contractors Association Manual K, or
whichever is applicable.
Use flexible duct collars to minimize the transmission of vibration/noise
into the conditioned space. If electric heat is used, non-flammable
material must be used.
All ducts should be suspended using flexible hangers and never fas-
tened directly to the structure.
HORIZONTAL SUSPENSION
These air handlers may be suspended in horizontal applications. It is
recommended to use angle steel support brackets with minimum 3/8”
threaded rods, supporting the unit from the bottom. Attach the threaded
rods at the locations shown in the figure below.
FIGURE 4:
Condensate Deflector on Vertical Drain Pan
The condensate deflector should be installed in the s-clip section
which is inside the drain pan edge. See Figure 6.
FIGURE 5:
Condensate Deflector on Horizontal Drain Pan Edge
CONDENSATE
DEFLECTOR
S-CLIPS (3)
VERTICAL
DRAIN PAN
NOTICE
S-CLIPS ON HORIZONTAL PAN
FEEDER
TUBES
CONDENSATE
DEFLECTOR
FIGURE 6:
S-Clip Installation
Do not bring in return air from a location which could introduce haz-
ardous substances into the airflow.
This unit is not designed for non-ducted (freeblow) applications. Do
not operate without ductwork attached to unit.
When assembling the support structure, make sure to size to provide
clearance for access door removal.
CONDENSATE
DEFLECTOR
S-CLIP
DRAIN PAN
WALL
NOTICE
