27
SYSTEM OPERATION
5
6-3/16
7-3/8
SUPPLY
12" X 17"
RETURN
11" X 25"
Horizontal Discharge Duct Connections
RIGGING DETAILS
WARNING
To prevent property damage, the unit should remain
in an upright position during all rigging and moving
operations. To facilitate lifting and moving when a crane
is used, place the unit in an adequate cable sling.
CAUTION
If units are lifted two at a time, the fork holes on the
condenser end of the unit must not be used. Minimum
fork length is 42” to prevent damage to the unit;
however, 48” is recommended.
Provisions for forks have been included in the unit base
frame. No other fork locations are approved.
WARNING
To prevent possible equipment damage, property damage,
personal injury or death, the following bullet points
must be observed when installing the unit.
•
Unit must be lifted by the four lifting holes located at
the base frame corners.
•
Lifting cables should be attached to the unit with
shackles.
•
The distance between the crane hook and the top of
the unit must not be less than 60”.
•
Two spreader bars must span over the unit to prevent
damage to the cabinet by the lift cables. Spreader bars
must be of sufficient length so that cables do not come
in contact with the unit during transport. Remove
wood struts mounted beneath unit base frame before
setting unit on roof curb. These struts are intended to
protect unit base frame from fork lift damage. Removal
is accomplished by extracting the sheet metal retainers
and pulling the struts through the base of the unit.
Refer to rigging label on the unit.
Important: If using bottom discharge with roof curb,
ductwork should be attached to the curb prior to
installing the unit. Ductwork dimensions are shown in
Roof Curb Installation Instructions.
Refer to the Roof Curb Installation Instructions for proper
curb installation. Curbing must be installed in compliance
with the National Roofing Contractors Association Manual.
To assist in determining rigging requirements, unit weights
and center of gravity are shown as follows:
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