AAON CC-063 - Manual (Page 13)

13
2-5 ton units are horizontal discharge and
must have no obstruction on the discharge
side of the unit. Unit should not be installed
in an enclosure or pit.
Placement relative to the building or other
structures must be carefully selected.
Consider the effects of outdoor fan noise on
any
adjacent occupied space. It is
recommended that the unit be placed so that
air does not discharge toward windows on
intakes less than 25 feet away.
Service compartments must be accessible
for periodic servicing of compressors,
controls,
safety devices, refrigerant
service/shutoff valves, coils, and condenser
fans.
Heat
pumps require special location
consideration in areas where snow
accumulation can become an obstruction
and areas with prolonged continuous
subfreezing temperatures. The unit must be
placed to permit free drainage of the defrost
water and ice. A minimum 3 inches
clearance under the outdoor coil is required
in the milder climates. In more severe
weather locations, it is recommended that
the unit include additional elevation to allow
unobstructed drainage and airflow.
Table 2- Recommended Elevation
Minimums
Design
Temperature
Suggest Minimum
Elevation
+15

F and above
3”
-5

F to +17

F
8”
Below -5

F
12”
Forklifting the Unit
Units can be lifted from the base using a
forklift.
This allows movement and
placement without causing physical damage.
Larger units may require a fork length of 72
inches or the fork must have 72 inch fork
extensions. Smaller units can be lifted from
multiple sides, while larger units must be
lifted from the front side.
Forks must be perpendicular to the unit and
they must be in far enough that the back of
the fork is no more than 6 inches away from
the edge of the unit.
Lifting the Unit
If cables or chains are used to hoist the unit
they must be the same length and care
should be taken to prevent damage to the
cabinet. Arrange spreader bars, blocking, or
other lifting devices to prevent any damage
to the cabinet, coils, and condenser fans.
Before lifting unit, be sure that all shipping
material has been removed from unit. Secure
hooks and cables at all lifting points/lugs
provided on the unit.
Electrical
Verify the unit nameplate agrees with power
supply. Connect power and control field
wiring as shown on the unit specific wiring
diagram provided laminated and attached to
the door in the controls compartment.
Incorrect lifting can cause damage to
the unit.
CAUTION
Electric shock hazard. Before
attempting to perform any installation,
service, or maintenance, shut off all
electrical power to the unit at the
disconnect switches. Unit may have
multiple power supplies. Failure to
disconnect power could result in
dangerous operation, serious injury,
death or property damage.
WARNING