Microchannel coil cleaning, Service, Replacement parts – AAON CN-140 User Manual
Page 35: Aaon warranty, service and parts department, Caution
35
Microchannel Coil Cleaning
Documented
routine
cleaning
of
microchannel coils with factory provided e-
coating is required to maintain coating
warranty coverage. See E-Coated Coil
Cleaning section.
Air cooled heat exchangers may include
microchannel coils. Only clean water is
recommended for cleaning microchannel
coils. The water pressure used to clean
should not exceed 140 psi, from no closer
than 3 inches from the coils, and with the
water aimed perpendicular to the coils.
Field installed coil coatings are not
recommended with microchannels.
Only clean water is recommended for
cleaning microchannel coils. However, if
solutions are mandatory to clean the unit, a
cleaning solution with a pH between 5 and 9
that does not contain chlorides, sulfates,
copper, iron, nickel, or titanium is required.
Field installed coil coatings are not
recommended with microchannel coils.
Service
If the unit will not operate correctly and a
service company is required, only a
company with a Factory Trained Service
Technician qualified and experienced in air
conditioning is permitted to service the
systems to keep warranties in effect.
Replacement Parts
Parts for AAON equipment may be obtained
from your local AAON sales representative.
When ordering parts reference the unit serial
number and part number.
AAON Warranty, Service and Parts
Department
2424 S. Yukon Ave.
Tulsa, OK 74107
Ph: 918-583-2266
Fax: 918-382-6364
www.aaon.com
Note: Before calling, the Factory Trained
Service Technician should have model and
serial number of the unit available for the
service department to help answer questions
regarding the unit
Harsh chemicals, household bleach,
or acid cleaners should not be used
to clean outdoor or indoor 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
Detergents or coil cleaners are not
recommended
with
microchannel
condenser coils. Use pressureized
clean water, with pressure not to
exceed 140 psi. Nozzle should be 6”
and 80° to 90° coil face. Failure to do
so could result in coil damage.
CAUTION