66324-YIM-B-1004
Unitary Products Group 5
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.
CLEARANCES
All units require certain clearances for proper operation and
service. Refer to Figure 5 for the clearances required for
combustion, construction, servicing and proper unit opera-
tion.
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
later).
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.
Duct work should be designed and sized according to the
methods of the Air Conditioning Contractors of America
(ACCA), as set forth in their Manual D.
A closed return duct system shall be used. This shall not pre-
clude use of economizers or ventilation air intake. Flexible
joints may be used in the supply and return duct work to min-
imize the transmission of noise.
NOTE: Be sure to note supply and return openings.
Refer to Figure 5 for information concerning rear and bottom
supply and return air duct openings.
Before lifting a unit, make sure that its weight is dis-
tributed 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”
018 365 360 91 88 89 92
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
Do not permit overhanging structures or shrubs to
obstruct the condenser air discharge, combustion
air inlet or vent outlet.
When fastening duct work to the side duct flanges
on the unit, insert the screws through the duct
flanges only. Do not insert the screws through the
casing. Outdoor ductwork must be insulated and
waterproofed.
