5
Maintain an adequate clearance around the unit for safety,
service, maintenance, and proper unit operation. Leave a
clearance of 48” on all sides of the unit for possible compres-
sor removal or service access, and to ensure proper ventila-
tion and condenser airflow. Do not install the unit Beneath any
obstruction. Install the unit away from all building exhausts to
inhibit ingestion of exhaust air into the unit’s fresh-air intake.
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
connection frame. If gasket is loose, re-apply using strong
weather resistant adhesive.
P
rOtrusiOn
Inspect curb to ensure that none of the utility services (elec-
tric) routed through the curb protrude above the curb.
ROOF TOP DUCT CONNECTIONS
Install all duct connections on the unit before placing the
unit on rooftop.
INSULATED
PANELS
I
F
PROTRUSIONS
EXIST
,
DO
NO
ATTEMPT
TO
SET
UNIT
ON
CURB
.
CAUTION
h
OrizOntal
d
isCharge
To convert to horizontal discharge, remove the covers over
the horizontal duct connections (save washered screws).
Refer to IOD-7006 included in the literature pack for install-
ing horizontal duct covers to the downflow duct connections.
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.
HORIZONTAL DISCHARGE DUCT CONNECTIONS
RIGGING DETAILS
Provisions for forks have been included in the unit base
frame. No other fork locations are approved.
• 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 dam-
age 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.
RETURN
SUPPLY
12”
17”
7 3/8”
11”
4 7/8””
25”
6 3/16”
REMOVE
COVERS
I
F
UNITS
ARE
LIFTED
TWO
AT
A
TIME
,
THE
FORK
HOLES
ON
THE
CONDENSER
END
OF
THE
UNIT
MUST
NOT
BE
USED
. M
INIMUM
FORK
LENGTH
IS
42”
TO
PREVENT
DAMAGE
TO
THE
UNIT
;
HOWEVER
, 48”
IS
RECOMMENDED
.
CAUTION
