280241-YIM-D-0909
6 Johnson Controls Unitary Products
3. For ground level installation, a level pad or slab should
be used. The thickness and size of the pad or slab used
should meet local codes and unit weight. Do not tie the
slab to the building foundation.
4. For roof top installation, be sure the structure will support
the weight of the unit plus any field installed components.
Unit must be installed on a level roof curb or appropriate
angle iron frame providing adequate support under the
compressor/condenser section.
5. Maintain level tolerance of unit to 1/8" maximum.
CLEARANCES
All units require certain clearances for proper operation and
service. Refer to Table 12 for the clearances required for
combustion, construction, servicing and proper unit opera-
tion.
RIGGING OR HANDLING
Care must be exercised when moving the unit. Do not
remove any packaging until the unit is near the place of
installation. Rig unit with slings placed under the unit.
Spreader bars of sufficient length should be used across the
top of the unit.
Units may also be moved or lifted with a fork-lift. Slotted
openings in the skid are provided for this purpose. Forks
must pass completely through the base.
Refer to Table 2 for unit weights and to Figure 2 for approxi-
mate center of gravity.
DUCT WORK
These units are adaptable to downflow use as well as rear
supply and return air duct openings. To convert to downflow,
use the following steps:
1. Remove the duct covers found in the bottom return and
supply air duct openings. There are four (4) screws
securing each duct cover (save these screws to use in
Step 2).
2. Install the duct covers (removed in step one) to the rear
supply and return air duct openings. Secure with the four
(4) screws used in step one.
3. Seal duct covers with silicone caulk.
Do not permit overhanging structures or shrubs to
obstruct the condenser air discharge, combustion
air inlet or vent outlet.
Before lifting a unit, make sure that its weight is
distributed equally on the cables so that it will lift
evenly.
TABLE 2: UNIT WEIGHTS AND CENTER OF
GRAVITY
UNIT
SIZE
SHIPPING
WEIGHT
(
LBS.)
OPERATING
WEIGHT
(LBS.)
CORNER WEIGHTS
(
LOCATION, LBS.)
“A” “B” “C” “D”
024 365 360 91 88 89 92
030 395 390 98 95 96 99
036 400 395 100 96 98 101
042 470 465 131 129 101 103
048 475 470 133 130 102 104
060 485 480 136 133 105 107
FIGURE 2 - UNIT CENTER OF GRAVITY
"A"
"B"
"C"
"D"
49-1/8
25
25
47-1/4
FRONT
OF
UNIT
CENTER OF
GRAVITY
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