Steps To Touch-Up Small Sections Of The Finned Coil Surface; Steps To Touch-Up End (Dead) Tubes And/Or Condenser Coil Headers; Materials Required - York YVAA Installation Operation & Maintenance

SECTION 9 - MAINTENANCE
1-8. Refer to the Johnson Controls Microchannel Heat
Exchanger Application Guide (Form 150-12-AD1) for
further details on the classification of polluted and cor-
rosive environments.
Environment Guard Premium coils are
coated with a black epoxy coating.
Step 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.
Step 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.
Step 3: Apply a coil cleaning solution approved by
Johnson Controls. Johnson Controls approves the use
of RectorSeal brand GulfCleanTM coil cleaner, or
equivalent, on Environment Guard Premium micro-
channel coils only. Coil cleaning solution is available
from Johnson Controls Aftermarket Parts Centers in
all global regions. Mix the correct amount of cleaner
solution and water in accordance with the manufac-
turer's directions on the container. Use a hand-held
pump sprayer to apply the mixed cleaner solution on
the coils. Ensure 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.
Step 4: Repeat the water rinse as described in Step 2 to
remove the cleaning solution.
Step 5: Apply a salt reducer solution approved by
Johnson Controls. Johnson Controls approves the use
of RectorSeal brand GulfCleanTM salt reducer, or
equivalent, on Environment Guard Premium micro-
channel coils only. Salt reducer solution is available
from Johnson Controls Aftermarket Parts Centers in all
global regions. Mix the correct amount of salt reducer
solution and water in accordance with the manufactur-
er's directions on the container. Use a hand-held pump
sprayer to apply the solution on the coils. Ensure that
the entire surface of the coils is wetted with the solu-
tion. Allow the salt reducer solution to remain on each
of the coils for approximately 10 mins.
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Step 6: Repeat the water rinse as described in Step 2 to
remove the salt reducer solution. The final rinse must
be thorough to ensure all cleaning solution and salt re-
ducer solution is removed from the coils.
Step 7: It is important to remove any excess water
trapped in the coils immediately after the final water
rinse. The condenser fans on the chiller can be run after
the final water rinse to properly dry the coils. Any ex-
cess water can also be removed by blowing air through
the coils with a hand-held blower or vacuum.
Step 8: Visually inspect the Environment Guard Pre-
mium e-coating for any damage, degradation or bare
spots. If touch-up of the coating is necessary, follow
the applicable steps below to touch-up e-coat after
cleaning:
Steps to touch-up small sections of the
finned coil surface:
1. Use the Touch-up paint to touch-up small sections
of the coil surface. Shake the aerosol can thoroughly
until the mixing ball rattles, then continue to shake the
can for 2 min.
2. Using slow dusting passes, spray the contents of the
can in both horizontal and vertical patterns around 4-6
inches from the impacted section of the coil surface for
an even coating.
Steps to touch-up end (dead) tubes and/or
condenser coil headers:
In cases where e-coating on the end tubes and/or con-
denser coil headers is showing signs of degradation,
2-part Urethane Mastic must be used for touch-up. Do
not use 2-part Urethane Mastic on finned coil surface.
Do not use 2-part Urethane Mastic on
finned coil surface. Using Urethane
Mastic on finned surfaces can result in
the blockage of fin sections which leads
to reduced airflow across the coil.

Materials required:

• 2-Part Urethane Mastic kit (JCI P/N: 013-04188-
000).
• 1 x Mixing Dish.
• 3 x 3ml droppers.
• Soft bristle paint brush.
Form 201.47-ICOM1
Issue date: 17/11/2022
JOHNSON CONTROLS