Lubrication
All original motors and bearings are
furnished with an original factory charge of
lubrication. Certain applications require
bearings be re-lubricated periodically. The
schedule will vary depending on operating
duty, temperature variations, or severe
atmospheric conditions.
Bearings must be re-lubricated at normal
operating temperatures, but not when
running.
Condenser Coil Inspection
The coils are leak tested at 4482 kPa (650
psig), before shipment. AAON will not be
responsible for loss of refrigerant. It is the
responsibility of the installer to verify that the
system is sealed before charging with
refrigerant.
Maintenance Requirements
Fan Motor Maintenance
Cleaning - Remove oil, dust, water, and
chemicals from exterior of motor. Keep
motor air inlet and outlet open. Blow out
interior of open motors with clean
compressed air at low pressure.
Labeled Motors - It is imperative for repair of
a motor with Underwriters’ Laboratories
label that original clearances be held; that all
plugs, screws, other hardware be fastened
securely, and that parts replacements be exact
duplicates or approved equals. Violation of
any of the above invalidates Underwriters’
Label.
Access Doors
If scale deposits or water is found around the
access doors, adjust door for tightness.
Adjust as necessary until leaking stops when
door is closed.
Propeller Fans and Motors
The fans are directly mounted on the motor
shafts and the assemblies require minimal
maintenance except to assure they are clear
of dirt or debris that would impede the
airflow.
Required Annual Inspection
In addition to the above maintenance
activities, a general inspection of the unit
surface must be completed at least once a
year.
Air-Cooled Condenser
The air-cooled condenser section rejects heat
by passing outdoor air over the condenser
coils for cooling of the hot refrigerant gas
from the compressors.
Inspect the condenser coils annually to
ensure unrestricted airflow. If the installation
has a large amount of airborne dust or other
material, clean the condenser coils with a
water spray in a direction opposite to airflow.
Care must be taken to prevent damage to the
coils.
Microchannel Coil Cleaning
Cleaning microchannel coils is necessary in
all locations. In some locations it may be
necessary to clean the coils more or less often
than recommended. Condenser coil must be
cleaned at a minimum of once a year. In
locations where there is commonly debris or
a condition that causes dirt/grease build up it
may be necessary to clean the coils more
often. Proper procedure must be followed at
every cleaning interval. Using improper
cleaning technique or incorrect chemicals
will result in coil damage, system
performance fall off, and potentially leaks
requiring coil replacement.
Documented routine cleaning of
microchannel coils with factory provided e-
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