56
E-Coated Coil Cleaning
Documented routine cleaning of e-coated
coils is required to maintain coating warranty
coverage for fin and tube and microchannel
coils. E-Coated Coil Maintenance Record
sheets are provided in the appendix.
Surface loaded fibers or dirt must be removed
prior to water rinse to prevent restriction of
airflow. If unable to back wash the side of the
coil opposite of the coils entering air side,
then surface loaded fibers or dirt must be
removed with a vacuum cleaner. If a vacuum
cleaner is not available, a
soft non-metallic
bristle brush may be used. In either case, the
tool must be applied in the direction of the
fins. Coil surfaces can be easily damaged (fin
edges bent over) if the tool is applied across
the fins.
Use of a water stream, such as a garden hose,
against a surface loaded coil will drive the
fibers and dirt into the coil. This will make
cleaning efforts more difficult. Surface
loaded fibers must be completely removed
prior to using low velocity clean water rinse.
A
monthly
clean water rinse is recommended
for coils that are applied in coastal or
industrial environments to help to remove
chlorides, dirt, and debris. It is very important
when rinsing, that water temperature is less
than 54.4°C (130°F) and pressure is less than
689.5 kpa (100 psig) to avoid damaging the
fin edges. An elevated water temperature
(not to exceed 54.4°C [130°F]) will reduce
surface tension, increasing the ability to
remove chlorides and dirt.
Quarterly cleaning is essential to extend the
life of an e-coated coil and is required to
maintain coating warranty coverage.
Coil cleaning shall be part of the unit’s
regularly scheduled maintenance procedures.
Failure to clean an
e-coated coil will void the
warranty and may result in reduced
efficiency and durability.
For routine quarterly cleaning, first clean the
coil with the below approved coil cleaner.
After cleaning the coils with the approved
cleaning agent, use the approved chloride
remover to remove soluble salts and
revitalize the unit.
Recommended Coil Cleaner
The following cleaning agent, when used in
accordance with the manufacturer’s
Electric shock hazard. Shut off all
electrical power to the unit to avoid
shock hazard or injury from rotating
parts.
WARNING
Harsh chemicals, household bleach,
or acid cleaners must not be used to
clean outdoor or indoor e-coated coils.
These cleaners can be very difficult to
rinse out of the coil and can accelerate
corrosion and attack the E-coating. If
there is dirt below the surface of the
coil, use the recommended coil
cleaners.
High velocity water from a pressure
washer or compressed air must only
be used at a very low pressure to
prevent fin and/or coil damages. The
force of the water or air jet may bend
the fin edges and increase airside
pressure drop. Reduced unit
performance or nuisance unit
shutdowns may occur.
CAUTION
CAUTION
Summary of Contents for RQ NextGen Series
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Page 26: ...26 Figure 3 RQ Cabinet Standard and Power Exhaust Gasket Locations...
Page 40: ...40 Figure 23 Post Corner Hole Piping Figure 24 Post Back Hole Piping...
Page 88: ...88 Gas Heater Operating Instructions Figure 36 Gas Heater Instructions...
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Page 105: ...105 Maintenance Log E Coated Coil...
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