AAON CB-060 - Manual (Page 12)

12
blow toward windows less than 25 feet
away.
Heat
pumps require special location
consideration in areas where snow
accumulation can become an obstruction
and in areas with prolonged continuous
subfreezing temperatures. Heat pump unit
bases are cutout under the outdoor coil to
permit drainage of frost accumulation. The
unit must be situated to permit free
unobstructed 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 be
elevated to allow unobstructed drainage and
airflow.
Table 1 - Recommended Elevation
Minimums
Design
Temperature
Suggest Minimum
Elevation
+15

F and above
3”
-5

F to +17

F
8”
Below -5

F
12”
Lifting the Unit
CB Series condensing units have channels
underneath the base which provide lifting
access to the underside of the equipment and
allow moving and placement without
physical damage.
Dollies and/or carts are recommended to lift
and place the unit to prevent damage to the
equipment and injury to the installer.
Care should be taken if using spreader bars,
blocking, or other lifting devices to prevent
any damage to the cabinet, coil or
condensing fans.
Before lifting unit, be sure that all shipping
material has been removed from unit.
Hoist unit to a point directly above the
condenser pad, and lower unit into the
proper place. Unit may also be positioned
with a dolly. When the unit is in place,
remove the dolly or lifting device. Make
sure the unit is properly seated and level.
Electrical
Verify the unit nameplate agrees with the
power supply. Connect power and control
field wiring as shown on the unit wiring
diagram provided with the unit.
Route power and control wiring through the
utility entries on the unit. It is recommended
not to run power and control signal wires in
the same conduit. If the control wires are to
run inside the same conduit, 600 volt wires
should be used, or as required by applicable
codes.
Size supply conductors based on the unit
MCA rating. Supply conductors must be
rated a minimum of 75°C.
Protect the branch circuit in accordance with
code requirements. The unit must be
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