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7
ROOF CURB POST-INSTALLATION CHECKS
After installation, check the top of the curb, duct connection
frame and duct flanges to make sure gasket has been
applied properly. Gasket should be firmly applied to the top
of the curb perimeter, duct flanges and any exposed duct
connection frame. If gasket is loose, re-apply using strong
weather resistant adhesive.
Protrusion
Inspect curb to ensure that none of the utility services
(electric) routed through the curb protrude above the curb.
CAUTION
If protrusions exist, do not attempt to set unit
on curb.
ROOF TOP DUCT CONNECTIONS
Install all duct connections on the unit before placing the
unit on rooftop.
Horizontal Discharge
Refer to IOD-7082 included in the literature pack for
installing horizontal duct covers.
Flexible duct connectors between the unit and ducts are
recommended. Insulate and weatherproof all external
ductwork and joints as required and in accordance with
local codes.
5
6-3/16
7-3/
8
SUPPL
Y
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.
Summary of Contents for AHRI 210
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