Cleaning Environment Guard Premium microchannel coils
Environment Guard Premium microchannel coils must be cleaned following this procedure at least
once every quarter or every three months to ensure that the integrity of the coils and the warranty
of the coils are maintained. In environments where the coils can become heavily fouled or where
there are high levels of pollution or corrosive elements, perform a monthly cleaning procedure
using Step 1, Step 2, and Step 7 in this procedure, in addition to the quarterly cleaning requirement
using the full procedure. Refer to the Microchannel Heat Exchanger Application Guide, Form 150-12-
AD1, for further details on the classification of polluted and corrosive environments.
CAUTION
Do not spray cleaning agents and water directly onto electrical components and wiring in the V-panels
and the chiller.
Note: Environment Guard Premium coils are coated with black epoxy coating.
1. Use a vacuum cleaner with a soft brush attachment to remove surface debris such as dirt,
leaves, insects, or fibers. When brushing debris off the face of the coil, you can also use a
soft bristle brush. Do not use a wire brush. Do not scrape the coil with the vacuum nozzle, air
nozzle, or any other hard tool.
2. Rinse the coil with potable tap water. Use a gentle spray from a spray nozzle with a plastic
end. Do not contact the coil with the hose nozzle. Rinse the coil by running water through
every passage in the heat exchanger surface until it is clean.
3. Apply a coil cleaning solution approved by Johnson Controls, such as RectorSeal brand
GulfClean
™
coil cleaner or equivalent, on Environment Guard Premium microchannel coils
only. Coil cleaning solution is available from Johnson Controls Aftermarket Parts Centers in all
global regions.
a. Mix the correct amount of cleaner solution and water in accordance with the
manufacturer’s directions on the container.
b. Use a hand-held pump sprayer to apply the mixed cleaner solution on the coils.
c. Make sure to wet the entire surface of the coils with the solution.
d. Leave the cleaning solution on each of the coils for approximately 10 min.
4. To remove the cleaning solution, repeat the water rinse procedure in Step 2.
5. Apply a salt reducer solution approved by Johnson Controls, such as RectorSeal brand
GulfClean
™
salt reducer or equivalent, on Environment Guard Premium microchannel coils
only. Salt reducer solution is available from Johnson Controls Aftermarket Parts Centers in all
global regions.
a. Mix the correct amount of salt reducer solution and water in accordance with the
manufacturer’s directions on the container.
b. Use a hand-held pump sprayer to apply the solution on the coils.
c. Make sure to wet the entire surface of the coils with the solution.
d. Leave the salt reducer solution on each of the coils for approximately 10 min.
6. To remove the salt reducer solution, repeat the water rinse procedure in Step 2. The final
rinse must be thorough to ensure that all cleaning solution and salt reducer solution is
removed from the coils.
7. It is important to remove any excess water trapped in the coils immediately after the final
water rinse.
a. To fully dry the coils, run the condenser fans on the chiller after the final water rinse.
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