5
U
NIT
P
RECAUTIONS
•
Do not stand or walk on the unit.
•
Do not drill holes anywhere in panels or in the base frame
of the unit except where indicated. 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 architect.
•
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.
R
OOF
C
URB
I
NSTALLATIONS
O
NLY
:
Curb installations must comply with local codes and should be done
in accordance with the established guidelines of the National Roof-
ing 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 in-
stalling contractor. All required hardware necessary for the as-
sembly of the sheet metal curb is included in the curb accessory.
WARNING
T
O 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.
A
LL
CURBS
LOOK
SIMILAR
. T
O
AVOID
INCORRECT
CURB
POSITIONING
,
CHECK
JOB
PLANS
CAREFULLY
AND
VERIFY
MARKINGS
ON
CURB
ASSEMBLY
. I
NSTRUCTIONS
MAY
VARY
IN
CURB
STYLES
AND
SUPERSEDES
INFORMATION
SHOWN
.
CAUTION
See the manual shipped with the roof curb for assembly and in-
stallation instructions.
CLEARANCES
24”
Min.*
24”
Min.*
36” Min.
*
Unit Clearances
*In situations that have multiple units, a 48” minimum clearance is
required between the condenser coils.
Adequate clearance around the unit should be kept for safety, ser-
vice, maintenance, and proper unit operation. A total clearance
of 75” on the main control panel side of the unit is recommended
to facilitate possible fan shaft, coil, electric heat and gas furnace
removal. A clearance of 48” is recommended on all other sides of
the unit to facilitate possible compressor removal, to allow ser-
vice access and to insure proper ventilation and condenser air-
flow. The unit must not be installed beneath any obstruction. The
unit should be installed remote from all building exhausts to in-
hibit ingestion of exhaust air into the unit fresh air intake.
NOTE
: If the 48” minimum is used on the control panel side of a
DCG unit, a flue extension (MF# 220-GX-01) needs be to installed
to prevent flue gas recirculation.
INSULATED
PANELS
Roof Curb Installation
