York YLAA0041 Installation Operation & Maintenance page 201

Form 150.72-ICOM6
Issue date: 12/19/2023
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, you can also use a soft bristle
brush (not wire). 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. For
YLAA chiller, rinse the microchannel coils from
the inside out through the access window on the
V-Panel and the round the tube coils from the out-
side.
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.
5. Apply a salt reducer solution approved by John-
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-
Johnson Controls
6. Repeat the water rinse as described in Step 2
7. It is important to remove any excess water trapped
8. Visually inspect the Environment Guard Premium
coil cleaner,
TM
Steps to touch-up small sections of finned
coil surface on microchannel coils
1. Use the touch-up paint to touch up small sections
2. Using slow dusting passes, spray the contents of
Steps to touch-up end (dead) tubes or
condenser coil headers on microchannel
coils
In cases where e-coating on the end tubes or condenser
coil headers is showing signs of degradation, you must
salt reducer,
TM
use 2-part urethane mastic for touch-up. Do not use
2-part urethane Mastic on finned coil surface.
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 min.
to remove the salt reducer solution. Ensure that
the final rinse is thorough in order to remove all
cleaning solution and salt reducer solution from
the coils.
in the coils immediately after the final water rinse.
The condenser fans on the chiller can be run after
the final water rinse to correctly dry the coils. Re-
move any excess water by blowing air through the
coils with a hand-held blower or vacuum.
e-coating on the microchannel coils for any dam-
age, degradation or bare spots. If touch-up of the
coating is necessary, follow the applicable steps in
the following section to touch-up the 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.
Section 10: Maintenance
10
201