•The base should also be located where no runoff of water from higher ground can collect in the unit.
ROOF TOP INSTALLATIONS ONLY:
•To avoid possible property damage or personal injury, the roof must have sufficient structural strength to carry the weight of the unit(s) and snow or water loads as required by local codes. Consult a structural engineer to determine the weight capabilities of the roof.
•The unit may be installed directly on wood floors or on Class A, Class B, or Class C roof covering material.
•To avoid possible personal injury, a safe, flat surface for service personnel should be provided.
•As indicated on the unit data plate, a minimum clearance of 36” to any combustible material is required on the furnance access side of the unit. All combustible materials must be kept out of this area.
•This 36” clearance must also be maintained to insure proper combustion air and flue gas flow. The combustion air intake and furance flue discharge must not be blocked for any reason, including blockage by snow.
•Adequate clearances from the furnace flue discharge to any adjacent public walkways, adjacent buildings, building openings or openable windows must be maintained in accordance with the latest edition of the National Fuel Gas Code (ANSI Z223.1)
•Minimum horizontal clearance of 48” from the furnace flue discharge to any electric meters, gas meters, regulators and relief equipment is required.
UNIT PRECAUTIONS
•Do not stand or walk on the unit.
•Do not drill holes anywhere in panels or in the base frame of the unit. Unit access panels provide structural support.
•Do not remove any access panels until unit has been installed on roof curb or field supplied structure.
•Do not roll unit across finished roof without prior approval of owner or achitect.
•Do not skid or slide on any surface as this may damage unit base. The unit must be stored on a flat, level surface. Protect the condenser coil because it is easily damaged.
ROOF CURB INSTALLATIONS ONLY:
Curb installatons must comply with local codes and should be done in accordance with the established guidelines of the National Roofing Contractors Association.
Proper unit installation requires that the roof curb be firmly and permanently attached to the roof structure. Check for adequate fastening method prior to setting the unit on the curb.
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 installaton 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”
Unit Clearances
5
