Supply Fans - AAON RN SERIES Installation Operation & Maintenance

Generally the best and broadest based
procedure is #1. The grease cutting effect of
the Simple Green is good for restaurant
applications.
Other Coil Cleaners
There are many cleaners on the market for
condenser coils. Before using any cleaner
that is not covered in this section you must
get written approval from the AAON
warranty and service department. Use of
unapproved chemicals
warranty.
AAON testing has determined that unless a
chemical has a neutral pH (6-8) it should not
be used.
Beware of any product that claims to be a
foaming cleaner. The foam that is generated
is caused by a chemical reaction to the
aluminum fin material on tube and fin coils
and with the fin, tube, and coating material
on microchannel coils.
Microchannel coils are robust in many ways,
but like any component they must be treated
correctly. This includes cleaning the coils
correctly to give optimal performance over
many years.
Roofing
The cleaning procedures outlined here use
relatively benign ingredients. When working
with a rooftop unit care should be taken to
make sure the chemicals will not adversely
affect the roof coating. Checking with the
roofing supplier/manufacturer is the best
way to proceed.
supplier/manufacturer
testing of the chemicals on the roof coating
is recommended.
Commercial roofing material manufacturers
using PVC and EPDM have been contacted
and indicate that there should be no problem
with any of the procedures outlined above.
will void the
If the roofing
is not available

Supply Fans

WARNING
Electric shock hazard. Shut off all
electrical power to the unit to avoid
shock hazard or injury from rotating
parts.
CAUTION
Blower wheels and bands must be
inspected for excessive dust build up
periodically and cleaned if required.
Excessive dust build up on blower
wheels may cause an unbalanced
state; leading to vibration and/or
component failure. Damages due to
excessive dust build up will not be
covered under factory warranty.
Lubrication
All original fan motors and bearings are
furnished with factory lubrication. Some
applications will require that bearings be re-
lubricated periodically. The schedule will
depend on the operating duty, temperature
variations or other severe atmospheric
conditions.
Bearings should be re-lubricated when at
normal operating temperatures, but not
running. Rotate the fan shaft by hand and
add only enough grease to purge the seals.
DO NOT OVERLUBRICATE.
Recommended greases are:
SHELL OIL - DOLIUM R
CHEVRON OIL - SRI No. 2
TEXACO INC. - PREMIUM RB
Removal (6-25 and 30 tons)
Remove fan access panel. Panel is attached
with eight 3/8" bolts.
85