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505328M 06/09
WIND BARRIER
PREVAILING
WINTER WINDS
24"
(610 mm)
INLET AIR
INLET AIR
INLET AIR
Figure 8. Rooftop Application and Wind Barrier
NOTE − If necessary for stability, anchor unit to slab as
described in
Stabilizing Unit on Uneven Surfaces.
ELEVATING THE UNIT
These units are outfitted with elongated−shaped feet as
illustrated in figure 9.
LEG DETAIL
BASE
2" (50.8MM)
SCH 40
FEMALE
THREADED
ADAPTER
Figure 9. Elevated Slab Mounting using Feet
Extenders (Larger Base Units)
If additional elevation is necessary, raise the unit by
extending the height of the unit support feet. This may be
done with 2" SCH 40 female threaded adapter. The
specified coupling will fit snuggly into the recess portion of
the feet. Use additional 2" SCH 40 male threaded adapters
which can be threaded into the female threaded adapters
to make additional adjustments to the level of the unit.
NOTE − Keep the height of extenders short enough to
ensure a sturdy installation. If it is necessary to extend
further, consider a different type of field−fabricated
framework that is sturdy enough for greater heights.
STABILIZING UNIT ON UNEVEN SURFACES
To help stabilize an outdoor unit, some installations may
require strapping the unit to the pad using brackets and
anchors commonly available in the marketplace.
With unit positioned at installation site, remove two side
louvered panels to expose the unit base pan.
Install the
brackets as illustrated in figure 10 using conventional
practices; replace the panels after installation is complete.
IMPORTANT
Using field−provided stabilizer brackets:
Always use stabilizers when unit is raised above the
factory height. (Elevated units could become
unstable in gusty wind conditions).
Stabilizers may be used on factory height units
when mounted on an unstable or uneven surface.
ONE BRACKET PER SIDE (MIN.); FOR EXTRA STABILITY,
TWO BRACKETS PER SIDE, 2" FROM EACH CORNER.
PLASTIC ANCHOR − USE IF CONCRETE
(HOLE DRILL 1/4"); NOT IF PLASTIC SLAB
(HOLE DRILL 1/8").
COIL
BASE PAN
CORNER POST
STABILIZING BRACKET
(18 GAUGE METAL − 2"
WIDTH; HEIGHT AS
REQ’D)
Slab Side Mounting
#10 1/2" LONG
SELF−DRILLING SHEET
METAL SCREWS
#10 1−1/4" LONG HEX
HD SCREW AND
FLATWASHER
MINIMUM 1
PER SIDE
FOR EXTRA
STABILITY
Deck Top
Mounting
STABILIZING
BRACKET (18
GAUGE METAL − 2"
WIDTH; HEIGHT
AS REQ’D); BEND
TO FORM RIGHT
ANGLE
Figure 10. Installing Stabilizer Brackets
Removing Panels
CAUTION
To prevent personal injury, or damage to panels,
unit or structure, be sure to observe the following:
While installing or servicing this unit, carefully stow
all removed panels out of the way, so that the panels
will not cause injury to personnel, nor cause
damage to objects or structures nearby, nor will the
panels be subjected to damage (e.g., being bent or
scratched).
While handling or stowing the panels, consider any
weather conditions, especially windy conditions,
that may cause panels to be blown around and
battered.
