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 ap- plied properly. Gasket should be firmly applied to the top of the curb perimeter, duct flanges and any exposed duct con- nection frame. If gasket is loose, reapply using strong weather resistant adhesive.
PROTRUSION
Inspect curb to ensure that none of the utility services (elec- tric) routed through the curb protrude above the curb.
CAUTION
IF PROTRUSIONS EXIST, DO NO 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
For horizontal discharge, remove the supply and return duct covers and place them over the vertical discharge return and supply openings. Install with insulation facing up, using the longer screws provided in the literature package.
Ensure that the top of the duct connection frame is flush with the top of the roof curb.
Flexible duct connectors between the unit and ducts are rec- ommended. Insulate and weatherproof all external ductwork and joints as required and in accordance with local codes.
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| 11” | 4 7/8”” |
| REMOVE |
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| COVERS |
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| 17” | 7 3/8” |
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| RETURN | 25” |
12” | SUPPLY |
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6 3/16”
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, duct- work should be attached to the curb prior to installing the unit. Ductwork dimensions are shown in Roof Curb Installa- tion 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.
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