AAON LC-054 - Manual (Page 24)

24
Maintenance Recommendations
Pump/Fan Motor Maintenance
Cleaning - Remove oil, dust, water, and
chemicals from exterior of motor and pump.
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.
Pump Bearings - Lubrication
Every 6 months or after a prolonged shut
down, use waterproof, lithium based grease.
Below 32°F, use Esso Exxon or Beacon 325.
Above 32°F, use Mobil Mobilox EP2, Shell
Alvania EP2 or Texaco RB2.
Air Inlet
Inspect the air inlet louvers into the
condenser section on a monthly basis to
remove any paper, leaves or other debris that
may block the airflow.
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.
Recommended Annual Inspection
In addition to the above maintenance
activities, a general inspection of the unit
surface should be completed at least once a
year.
Mechanical Cleaning
Do not attempt to mechanically clean the
copper tubing in the condenser. Do not use
wire brushes or any other mechanical device
on the copper tubing. Severe damage may
result. Contact your water treatment expert
for recommendations on chemical cleaning
procedures.
Air-Cooled Condenser
The air-cooled condenser section rejects
heat by passing outdoor air over the fin tube
coils for cooling of the hot refrigerant gas
from the compressors. The heated air will
discharge from the top of the section
through the axial flow fans.
The condenser coils should be inspected
yearly to ensure unrestricted airflow. If the
installation has a large amount of airborne
dust or other material, the condenser coils
should be cleaned with a water spray in a
direction opposite to airflow. Care must be
taken to prevent bending of the aluminum
fins on the copper tubes.
E-Coated Coil Cleaning
Documented routine cleaning of e-coated
coils is required to maintain coating
warranty coverage.
Electric shock hazard. Shut off all
electrical power to the unit to avoid
shock hazard or injury from rotating
parts.
WARNING