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UNIT SUPPORT
NOTE:
Unit must be level + 2 degrees {3/8 inch rise or fall
per foot of run (10mm rise or fall per 305 mm of run) } or
compressor may not function properly.
A. GROUND
LEVEL INSTALLATION
The unit must be level and supported above grade by
beams, platform, or a pad. Platform or pad can be of open
or
solid
construction
but
should
be
of
permanent
materials
such
as
concrete,
bricks,
blocks,
steel,
or
pressure- treated timbers approved for ground contact.
Soil conditions must be considered so that the platform or
pad does not shift or settle and leave the unit partially
supported. Minimum pad dimensions are shown in Figure
If beams or an open platform are used for support, it is
recommended that the soil be treated or area be graveled
to reduce the growth of grasses and weeds.
To
minimize
vibration
or
noise
transmission,
it
is
recommended
that supports not be in contact with the
building structure. However, slabs on grade constructions
with an extended pad are normally acceptable.
B. ROOF TOP INSTALLATION
This type of installation is not recommended
on wood
frame structures where low noise levels are required.
Supporting structure or platform for the unit must be level.
If installation is on a flat roof, locate unit minimum 6 inches
(152mm) above roof level.
Place the unit over one or more load bearing walls. If there
are several
units,
mount
them
on
platforms
that are
self-supporting
and
span
several
load
bearing
walls.
These suggestions are to minimize noise and vibration
transmission through the structure. If the structure is a
home
or
apartment,
avoid
locating
the
unit
over
bedrooms or study.
NOTE:
When
unit
is to
be
installed
on
a
bonded
guaranteed
roof, a release must be obtained from the
building owner to free the installer from all liabilities.
C. FASTENING UNIT DOWN
If conditions or local codes require the unit be attached in
place, remove the knockouts in the base pan and install
tie down bolts through the holes (refer to Figure 2).
Contact local distributor for hurricane hold-down details
and the P.E. (Professional Engineer) certification, when
required.
A
CAUTION
PROPERTY DAMAGE HAZARD
Failure to follow this caution may result in proper-
ty damage.
Inadequate
unit
support
may
cause
excessive
vibration,
noise, and/or stress on the refrigerant
lines, leading to refrigerant line failure.
Figure 2
Tie Down
Knockouts
3/8" (10mm)
dia. Tie Down Knockouts
In Base Pan (2 places)
View From Top
Base Pan Width
Inches (mm)
Base Pan
Tie Down
Minimum
Width x
Knockouts
Mounting Pad
Depth
A
B
Cc
Dimensions
23x 28
7-34
[47716]
16
23x28
(684 x 584)
(97) | (113) | (457)
(684 x 584)
Oe tite
| Scie | 4-76 | 21-1/4
26 x 26
(652 x 652)
(230) | (113) | (640)
(680 x 660)
Bexar
|oane|
ete | 2458 | siexalte
(791 x 791)
(230) | (165) | (625)
(800 x 800)
421 01 6400 00
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