Quantech
196
Form QTC3-NM1
Issue date: 12/19/2023
Section 10: Maintenance
• Do not contact the coil with a hard object such as
a hose nozzle, hard vacuum nozzle, or any other
tool. Hard objects or tools can cause mechanical
damage to the coil material and protective coat-
ings on the coil.
• Do not use caustic or acidic cleaning solutions on
coils. Only use cleaning solutions approved by
Quantech.
The required cleaning procedure is different depending
on the type of coil and protective coating supplied with
the coil. This section describes the correct procedures
to maintain the integrity of each type of coil.
Cleaning procedure required for standard and
environment guard microchannel coils
You must clean standard and environment guard mi-
crochannel coils following this procedure at least once
every 3 months to ensure that the integrity of the coils
and the warranty of the coils are maintained. In envi-
ronments where coils become heavily fouled or there
are high levels of pollution or corrosive elements, a
monthly frequency of cleaning is recommended. Refer
to the Quantech Microchannel Heat Exchanger Appli-
cation Guide (Form 150-12-AD1) for further details
on the classification of polluted and corrosive environ-
ments.
Proper care must be taken to ensure that
cleaning agents and water are not sprayed
directly onto electrical components and
wiring in the V-panels and the chiller.
Standard and Environment Guard coils
are grey/silver color.
1. Remove surface debris such as dirt, leaves, in-
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
QTC3 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 Quan-
tech. Quantech approves the use of RectorSeal
brand GulfClean
TM
coil cleaner, or equivalent,
on microchannel coils. 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 min.
4. Repeat the water rinse as described in Step 2 to
remove the cleaning solution.
5. It is important to remove any excess water trapped
The condenser fans on the chiller can be run after
-
move any excess water by blowing air through the
coils with a hand-held blower or vacuum.
Cleaning procedure for environment guard
premium microchannel coils
You must clean environment guard premium micro-
channel coils following this procedure described below
at least once every 3 months to ensure that the integ-
rity of the coils and the warranty of the coils are main-
tained. In environments where the coils become heav-
ily fouled, or where there are high levels of pollution
or corrosive elements, a monthly cleaning procedure
using Steps 1, 2, and 7 below is recommended, in ad-
dition to the quarterly cleaning using Steps 1 to 8. Re-
fer to the Microchannel Heat Exchanger Application
Guide (Form 150-12-AD1) for further details on the
classification of polluted and corrosive environments
Proper care must be taken to ensure that
cleaning agents and water are not sprayed
directly onto electrical components and
wiring in the V-panels and the chiller.
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