AAON CB-060 - Manual (Page 11)

11
Installation
AAON equipment has been designed for
quick and easy installation.
Locating Unit
CB Series condensing units are designed for
outdoor application and placement at ground
level or on a rooftop. Units must be placed
on a level and solid foundation that can
support the unit’s weight.
When rooftop mounted, a steel frame must
be provided that will support the unit above
the roof itself for load distribution.
When installed at ground level, a one-piece
concrete slab or composite condenser pad
should be used with footings that extend
below the frost line (a substantial base that
will not settle). Slab should be surrounded
by a graveled area for proper drainage and
should not adjoin the building as sound and
vibration may be transmitted to the
structure. Care must also be taken to protect
the coils and fins from damage due to
vandalism or other hazards.
Airflow to and from the condensing unit
must not be restricted. Coils and fans must
be free of any obstructions and debris in
order to start and operate properly with a
correct amount of airflow. Obstruction to air
flow will result in decreased performance
and efficiency.
The installation position must provide at
least one foot of clearance from the wall for
proper air flow to the coils. When multiple
units are mounted adjacent to each other, the
clearance required between them is three
feet.
Service compartment must be accessible for
periodic servicing of controls, safety
devices, and refrigerant service/shutoff
valves. At least two feet of clearance on this
corner of the unit is recommended for
service.
Figure 1 – Condensing Unit Clearances
Condensing units should not be installed in
an enclosure or pit that is deeper than the
height
of the unit. When recessed
installation is necessary, the clearance to
maintain proper airflow is at least three feet.
CB Series condensing units are single
circuited with vertical air discharge. There
must be no obstruction above the equipment.
Do not place the unit under an overhang.
Placement relative to the building air intakes
and other structures must be carefully
selected. Consider the effects of outdoor fan
noise on conditioned space and any adjacent
occupied space. It is recommended that the
unit be placed so that discharge does not