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Section 9 - Maintenance
Cleaning procedure for environment
guard premium microchannel coils
Environment guard premium microchannel coils must
be cleaned following this procedure described below at
least once a quarter, every 3 months, to ensure that the
integrity of the coils and the warranty of the coils are
maintained. In environments where the coils become
heavily fouled or where there are high levels of pol-
lution or corrosive elements a monthly cleaning pro-
cedure using steps 1, 2, and 7 below is recommended,
in addition to the quarterly cleaning using steps 1 to 8.
Refer to the Microchannel Heat Exchanger Applica-
tion Guide (Form 150-12-AD1) for further details on
the classification of polluted and corrosive environ-
ments.
Environment guard premium coils are
coated with a black epoxy coating.
1. Remove surface debris such as dirt, leaves, in-
sects, or fibers with a vacuum cleaner having a
soft brush attachment. When brushing debris off
the face of the coil a soft bristle brush (not wire)
can also be used. 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 John-
son Controls. Johnson Controls approves the use
of RectorSeal brand GulfClean
or equivalent, on Environment Guard Premium
microchannel coils only. Coil cleaning solution
is available from Johnson Controls Aftermarket
Parts Centers in all global regions. Mix the cor-
rect amount of cleaner solution and water in ac-
cordance with the manufacturer's directions on
the container. Use a hand-held pump sprayer to
apply the mixed cleaner solution on the coils. En-
sure that the entire surface of the coils is wetted
with the solution. Allow the cleaning solution to
remain on each of the coils for approximately 10
mins.
4. Repeat the water rinse as described in Step 2 to
remove the cleaning solution.
172
5. Apply a salt reducer solution approved by John-
6. Repeat the water rinse as described in Step 2 to
7. It is important to remove any excess water trapped
8. Visually inspect the environment guard premium
Steps to touch-up small sections of
the finned coil surface
1. Use the touch-up paint to touch-up small sections
coil cleaner,
TM
2. Using slow dusting passes, spray the contents of
son Controls. Johnson Controls approves the use
of RectorSeal brand GulfClean
or equivalent, on Environment Guard Premium
microchannel coils only. Salt reducer solution
is available from Johnson Controls Aftermarket
Parts Centers in all global regions. Mix the cor-
rect amount of salt reducer solution and water in
accordance with the manufacturer's directions on
the container. Use a hand-held pump sprayer to
apply the solution on the coils. Ensure that the en-
tire surface of the coils is wetted with the solution.
Allow the salt reducer solution to remain on each
of the coils for approximately 10 mins.
remove the salt reducer solution. The final rinse
must be thorough to ensure all cleaning solution
and salt reducer solution is removed from the
coils.
in the coils immediately after the final water rinse.
The condenser fans on the chiller can be run af-
ter the final water rinse to properly dry the coils.
Any excess water can also be removed by blow-
ing air through the coils with a hand-held blower
or vacuum.
e-coating for any damage, degradation or bare
spots. If touch-up of the coating is necessary, fol-
low the applicable steps below to touch-up e-coat
after cleaning:
of the coil surface. Shake the aerosol can thor-
oughly until the mixing ball rattles, then continue
to shake the can for 2 min.
the can in both horizontal and vertical patterns
around 4 in. to 6 in. from the impacted section of
the coil surface for an even coating.
Form QTC4-NM2
Issue date: 05/12/2023
salt reducer,
TM
Quantech
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