Blast Chiller Evaporator Coil Cleaning Procedure
The following cleaning procedure is recommended as part of routine maintenance activity for all American
Panel Corporation blast chillers.
IMPORTANT:
Do not use any sharp or abrasive tools to clean the evaporator coil!
Before cleaning the evaporator coil run the defrost cycle to make sure the coil is completely free of ice.
When cleaning the evaporator coil particular attention must be paid to the kind of cleansing agent used. In
particular the following products MUST NEVER BE USED:
• Ammonia or detergents which contain ammonia (ammoniac solutions)
• Bleach or products containing bleach (chlorinated liquids)
• Acid detergents such as anti-lime scale, various anti-incrustations, muriatic acid, sulfuric, hydro
chloric and acetic acid liquids, etc. (highly acidic liquids)
• Acetone, trichloro-ethylene (organic solvents)
• Caustic soda and other highly alkaline substances (high basicity liquids)
All of the above substances can damage the protective coating and/or corrode the metal components and
seriously damage the coil.
WARNING: Disconnect and lock the main power switch prior to cleaning the unit.
Monthly
• Open the evaporator door by removing the screws that secure the door to the vertical frame and swing
the door open.
• Use a vacuum cleaner or a soft non-metallic bristle to remove the surface loaded fibers and dirt. Apply
the tool in the direction of the fins.
• Rinse the coil finned area and the return bends with plenty of clean look-warm water. To avoid damaging
the fins and the coating, it is important that the water temperature is below 130oF and the water pres
sure is below 100 PSI.
• Close and secure the evaporator door.
Quarterly
• Open the evaporator door by removing the screws that secure the door to the vertical frame and swing
the door open.
• Use a vacuum cleaner or a soft non-metallic bristle brush to remove the surface loaded fibers and dirt.
Apply the tool in the direction of the fins.
• Spray the coil finned area and the return bends with a generous amount of the recommended coil cleaner
(see below) using a pump-up sprayer or conventional spray bottle. Refer to the manufacturer’s directions
on the container for proper mixing ratio.
• After cleaning the coil use the approved chloride remover (see below) to remove soluble salts and
revitalize the unit. Use a pump-up sprayer or a conventional spray bottle to soak the finned area and the
return bends. Refer to the manufacturer’s directions on the container.
• Rinse the coil finned area and the return bends with plenty of clean look-warm water. To avoid damaging
the fins and the coating, it is important that the water temperature is below 130oF and the water press-
ure is below 100 PSI.
• Close and secure the evaporator door.
Recommended Coil Cleaner
Enviro-Coil Concentrate
Hydro-Balance Corporation
Phone: (972) 394-9422
Recommended Chloride Remover
CHLOR*RID DTS
CHLOR*RID International, Inc.
Phone: (800) 422-3217
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