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175245-YIM-C-1008
Johnson Controls Unitary Products
7
6. Maintain level tolerance to 1/2 inch maximum
across the entire length or width of the unit.
If a unit is to be installed on a roof curb or special frame
other than a YORK
®
roof curb, gasketing must be
applied to all surfaces that come in contact with the unit
underside.
RIGGING AND HANDLING
Exercise care when moving the unit. Do not remove
any packaging until the unit is near the place of installa-
tion. Rig the unit by attaching chain or cable slings to
the round lifting holes provided in the base rails.
Spreaders, whose length exceeds the largest dimen-
sion across the unit, MUST BE USED. Refer to
Figure 1.
Units may also be moved or lifted with a forklift, from
the
side only
, providing that an accessory skid is used.
LENGTH OF FORKS MUST BE A MINIMUM OF 90"
.
Refer to the Physical Data Table 5 for unit weights and
to Figures 2 or 9 for approximate center of gravity.
CLEARANCES
All units require certain clearances for proper operation
and service. Installer must make provisions for ade-
quate ventilation air. Refer to Unit Dimensions
Figure 10 and Minimum Clearances Table 11 for the
clearances required for combustible construction, ser-
vicing, and proper unit operation.
DUCTWORK
Ductwork should be designed and sized according to
the methods in Manual Q of the Air Conditioning Con-
tractors of America (ACCA).
A closed return duct system shall be used. This shall
not preclude use of economizers or outdoor fresh air
intake. The supply and return air duct connections at
the unit should be made with flexible joints to minimize
noise.
Before lifting a unit, make sure that all panels
are in place and that its weight is distributed
equally on all cables so it will lift evenly.
FIGURE 1 - TYPICAL RIGGING
C A U T I O N :
B E F O R E L I F T I N G U N I T ,
M A K E S U R E T H A T I T S
W I D T H I S D I S T R I B U T E D
E Q U A L L Y O N T H E C A B L E S
S O T H A T I T W I L L L I F T
E V E N L Y
L I F T I N G
H O L E S
S P R E A D E R
B A R
FIGURE 2 - CENTER OF GRAVITY
Do not permit overhanging structures or shrubs
to obstruct outdoor air discharge outlet, com-
bustion air inlet or vent outlets.