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6
•
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 installations 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,
leveling 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
members.
• The roof members must not penetrate supply and
return 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
24" MIN.
24" MIN.
36” MIN.
Unit Clearances
*In situations that have multiple units, a 36” minimum
clearance is required between the condenser coils.
Adequate clearance around the unit should be kept for
safety, service, maintenance, and proper unit operation. A
clearance of 48” is recommended on all sides of the unit
to facilitate possible parts replacement, to allow service
access and to insure proper ventilation and condenser
airflow. The top of the unit should be completely
unobstructed. If units are to be located under an overhang,
there should be a minimum of 48” clearance and provisions
made to deflect the warm discharge air out from the
overhang. The unit should be installed remote from all
building exhausts to inhibit ingestion of exhaust air into the
unit fresh air intake.
NOTE: If the 36” minimum clearance is used on
the control panel side of a DRG unit, a flue
extension kit needs be to installed to prevent flue
gas recirculation. See table below for the kit
selection.
Model size
Kit part number
6 ton
HEFLUE048060
Model Size Kit
Roof Curb Installation
Summary of Contents for AHRI 210
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