Installation guide

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.
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 fiat 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.
I
Figure 2 J Tie Down Knockouts
%" (10rnrn) dia. Tie Down Knockouts [ View From Top
In Base Pan (2 places)
A
Base Pan
Width x Depth
Base Pan Width
Inches (mm)
Tie Down
Knockouts
Base
Pan
Depth
Minimum
23 x 23
(584 x 584)
25%6 x 25%6
(652 x 652)
31YB x 31Y8
(791 x 791)
3415_6 x 3415_6
(887 x 887)
o o
A B C
73_ 47_6 18
(197) (113) (457)
9_6 47_6 21¼
(230) (113) (540)
9_e 6Y2 24%
(230) (165) (625)
9_e 6Y2 287_6
(230) (165) (722)
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)
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.
4 421 01 5102 01