5
aiR conditionER inStallation
unpacking the unit
It is recommended that the unit be unpacked at the
installation site to minimize damage due to handling.
caution:
do not tip the unit on its side. oil may enter the
compressor cylinders and cause starting trouble.
if unit has been set on its side, restore to upright
position and do not run for several hours. then
run unit for a few seconds. do this three or four
times with five minutes between runs.
1. Remove the bands from around the unit.
2. Unfold the top and bottom cap flanges.
3. Carefully remove the top cap and tube.
installing Return & Supply air collars
If the supply and return collars are supplied with the unit,
they will be located in the supply duct. They can be easily
positioned over the unit openings (Figure 3) and secured
with sheet metal screws.
• The diameter of the return duct collar is 14”.
• The diameter of the supply duct collar is 12”.
• Before permanently installing the collars, it is
recommended you pre-fit them over the openings first
to determine best fit and alignment.
Supply Duct
1. Position the supply duct collar so the edge of the unit
opening fits between the flange and the bead.
2. Overlap the collar ends keeping the small screw holes
underneath.
3. Align the holes in the crimped area and install one screw.
notE:
It may be necessary to loosen the four screws
that hold the transition duct in order to install the supply
fitting. Re-tighten when installation is complete.
4. Tap collar (if necessary) to ensure engagement with
unit opening and install second screw.
5. Tighten first screw and rotate collar clockwise so joint
is near three o’clock position.
Figure 3. Return & Supply air collars
Transition
Duct Screws
Supply Air
Return Air
Duct
Dimples
MultiPlE duct aPPlication
SinglE duct aPPlication
Figure 2. Single & Multiple duct applications
Return Duct
1. Assemble the collar by overlapping the two ends.
notE:
One end of the collar is slotted and the opposite
end has two small holes. Position the end with small
screw holes underneath the slotted end.
2. Fasten the collar ends with two self drilling sheet metal
screws.
3. Position the collar over the unit opening. Align the
four holes in the collar with the four dimples or holes
(depending on unit model) in the panel.
4. Secure the collar to the rear panel using self drilling
screws (10-16x.5).
locating & installing the Return air assembly
To simplify installation, locate and install the return air
assembly first. If desired, the return opening can be
located inside a closet with louvered doors that has an
open area equal to or greater than a 12” x 20” grille. The
return air grille can be placed in the wall of a closet and
the air ducted into the filter box through a boxed-in area at
the closet floor level. Verify the filter is readily accessible.
