AAON LZ Series, Installation Operation & Maintenance, Page: 58 / 104

58
100 psig to avoid damaging the unit and coil
fin edges.
For routine quarterly cleaning, first clean the
coil
with the below approved coil
cleaner. After cleaning the coils with the
approved cleaning agent, use the approved
chloride remover to remove soluble salts and
revitalize the unit.
Recommended Coil Cleaner – Step 1
GulfCoat
TM
Coil Cleaner , assuming it is
used in accordance with the manufacturer's
directions on the container for proper mixing
and cleaning, has been approved for use on
E-coated coils to remove mold, mildew, dust,
soot, greasy residue, lint and other
particulate. Never use any cleaners that are
not approved.
Recommended Chloride Remover – Step 2
CHLOR*RID® Concentrate, assuming it
is used in accordance with the manufacturer's
directions on the container for proper mixing,
has been approved for use on E-coated coils
to remove chlorides/salts & sulfates. Never
use any chloride removers that are not
approved.
Warranty Protection – Step 1
Complete the coil cleaning following these
steps:
1. Ensure that the power to the unit is off
and locked out.
2. Clean the area around the unit if
needed to ensure leaves, grass or
loose debris will not be blown into the
coil.
3. Remove panels or tops as required
gaining access to the coil(s) to be
cleaned.
4. Using a pump up sprayer, fill to the
appropriate level with potable water
and add the correct amount of
approved cleaner as per manufacture
instructions leaving room for the
pump plunger to be reinserted.
NOTE: Coils should always be cleaned /
back flushed, opposite of airflow to prevent
impacting the dirt into the coil.
5. If the coils have heavy dirt, fibers,
grass, leaves etc. on the interior or
exterior face areas, a vacuum and
brush should be used to remove those
surface
contaminants prior to
applying cleaner. The interior floor,
drain tray or pan areas should also be
vacuumed.
6. Apply the mixed cleaner to coil
surfaces using a pressurized pump up
sprayer maintaining a good rate of
pressure and at a medium size nozzle
spray, (not a solid stream and not a
wide fan but somewhere in the
High velocity water from a pressure
washer or compressed air should only
be used at a very low pressure to
prevent fin and/or coil damages. The
force of the water or air jet may bend
the fin edges and increase airside
pressure
drop. Reduced unit
performance or nuisance unit
shutdowns may occur.
Harsh chemicals, household bleach,
or acid cleaners should not be used to
clean e-coated coils. These cleaners
can be very difficult to rinse out of the
coil and can accelerate corrosion and
attack the e-coating. If there is dirt
below the surface of the coil, use the
recommended coil cleaners.
CAUTION
CAUTION