Full perimeter roof curbs are available from the factory and are shipped unassembled. Field assembly, squaring, level- ing and mounting on the roof structure are the responsibility of the installing contractor. All required hardware necessary for the assembly of the sheet metal curb is included in the curb accessory.
WARNING
TO PREVENT POSSIBLE EQUIPMENT DAMAGE, PROPERTY DAMAGE, PERSONAL INJURY OR DEATH, THE FOLLOWING BULLET POINTS MUST BE OBSERVED WHEN INSTALLING THE UNIT.
•Sufficient structural support must be determined prior to locating and mounting the curb and package unit.
•Ductwork must be constructed using industry guidelines. The duct work must be placed into the roof curb before mounting the package unit. Our full perimeter curbs include duct connection frames to be assembled with the curb. Cantilevered type curbs are not available from the factory.
•Curb insulation, cant strips, flashing and general
roofing material are furnished by the contractor.
The curbs must be supported on parallel sides by roof mem- bers. The roof members must not penetrate supply and re- turn duct opening areas as damage to the unit might occur.
NOTE: The unit and curb accessories are designed to allow vertical duct installation before unit placement. Duct installation after unit placement is not recommended.
CAUTION
ALL CURBS LOOK SIMILAR. TO AVOID INCORRECT CURB POSITIONING, CHECK JOB PLANS CAREFULLY AND VERIFY MARKINGS ON CURB ASSEMBLY. INSTRUCTIONS MAY VARY IN CURB STYLES AND SUPERSEDES INFORMATION SHOWN.
See the manual shipped with the roof curb for assembly and installation instructions.
CLEARANCES
48”
48”
75”
Adequate clearance around the unit should be kept for safety, service, maintenance, and proper unit operation. A total clear- ance of 75” on the main control panel side of the unit is rec- ommended to facilitate possible fan shaft, coil, and electric heat. A clearance of 48” is recommended on all other sides of the unit to facilitate possible compressor removal, to allow service access and to insure proper ventilation and condenser airflow. The unit must not be installed beneath any obstruc- tion. The unit should be installed remote from all building exhausts to inhibit ingestion of exhaust air into the unit fresh air intake.
INSULATED
PANELS
ROOF CURB INSTALLATION
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.
UNIT CLEARANCES
5
