15
Wiring Diagrams:
A complete set of unit specific wiring diagrams in
both ladder and point-to-point form are laminated
in plastic and located inside the control
compartment door.
General Maintenance:
When the initial startup is made and on a periodic
schedule during operation, it is necessary to
perform
routine
service
checks
on
the
performance of the condenser. This includes
reading and recording suction pressures and
checking for normal sub-cooling and superheat.
See the evaporative condenser and air-cooled
condenser sections in this manual for specific
details.
INSTALLATION
Lifting and Handling:
If cables or chains are used to hoist the unit they
must be the same length and care must be taken to
prevent damage to the cabinet.
Before lifting unit, be sure that all shipping
material has been removed from unit. If the unit
includes an evaporative condenser, make sure the
tank is empty before lifting. Secure hooks and
cables at all lifting points/lugs provided on the
unit.
Do not push, pull or lift the unit from anything
other than its base.
UNIT MUST BE RIGGED AT ALL
MARKED LIFTING POINTS (Typical)
Condenser Placement:
The AAON condenser is designed for outdoor
applications and mounting at ground level or on a
rooftop. It must be placed on a level and solid
foundation that has been prepared to support its
weight. When installed at ground level, a one-
piece concrete slab must be used with footings
that extend below the frost line.
With ground level installation, care must be taken
to protect the coil fins from damage due to
vandalism or other causes.
The placement relative to the building air intakes
and other structures must be carefully selected. Be
sure to observe the dimensions that are on the
rating plate of the condenser for operational and
service clearances, which will appear as follows:
Table 1 - Service Clearances
Location
Unit Size
045-135
134-230
Front - Vestibule Door Side
100"
142"
Back - Opposite of Front
100"
142"
Left Side - Condenser End
100"
100"
Right Side - Opposite of Left
100"
100"
Top
UNOBSTRUCTED
Condenser coils and fans must be free of any
obstructions in order to start and operate properly
with a correct amount of airflow.
For proper unit operation, the immediate area
around condenser must remain free of debris that
may be drawn in and obstruct airflow in the
condensing section.
Consideration must be given to obstruction caused
by snow accumulation when placing the unit.
Compressor Compartment Exhaust Fan:
Prior
to
unit
operation
the
compressor
compartment exhaust fan shipping support
MUST BE
removed from the exterior of the unit.
The exhaust fan also requires the installation of
the exterior rain hood provided with the unit.
