AAON CL-230 - Manual (Page 5)

5
OWNER'S INFORMATION cont.
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-cooled 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 should be
taken to prevent damage to the cabinet.
• 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.
• 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 should 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:
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.
Mounting Isolation:
• For roof mounted applications or anytime
vibration transmission is a factor, vibration
isolators may be used.
Access Doors:
• A lockable access door is provided to the
compressor and electrical compartment.
• A light switch is on the wall of the compressor
control compartment.
Low Ambient Operation:
• The AAON low ambient (condenser flood-
back) system is used to operate a refrigerant
system below 25°F outside air temperature. As
the ambient temperature drops, the condenser
becomes more effective therefore lowering the
head pressure. When the head pressure gets too