UNIT SUPPORT
NOTE: Unit must be level + 2 degrees {% 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 2.
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.
PROPERTY DAMAGE HAZARD
Failure to follow this caution may result in property damage.
Top surface of platform must be above estimated snow-
fall level to prevent snow blocking coil and to allow water
melt to drain from unit.
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 RE. (Professional Engineer) certification, when
required.
PROPERTY DAMAGE HAZARD
Failure to follow this caution may result in property damage.
Inadequate unit support may cause excessive vibration,
noise, and/or stress on the refrigerant lines, leading to re-
frigerant line failure.
I
Figure 2 J Tie Down Knockouts
%" (10mm) dia. Tie Down Knockouts [ View From Top
In Base Pan (2 places)
Base
Pan
Depth
o o
A
Base Pan Width
Base Pan
Width x Depth
23 x 23
(584 x 584)
2511_6 X 2511_6
(652 x 652)
31Y8x 31Y8
(791 x 791)
3415_6x 3415_6
(887 x 887)
Inches (mm)
Tie Down
Knockouts
A B C
73A 47_6 18
(197) (113) (457)
91_6 47_6 21¼
(230) (113) (540)
91A6 61/2 245/8
(230) (165) (625)
91A6 61/2 287_6
(230) (165) (722)
Minimum
MountingPad
Dimensions
23 x 23
(584 x 584)
26 x 26
(660 x 660)
31Y2x 31Y2
(800 x 800)
35 x 35
(889 x 889)
4 428 01 5103 02
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