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PLATE FINNED COIL CLEANING
Dirty coils will reduce heating and/or cooling capacity and restrict airflow. All finned coils will
require cleaning. The cleaning frequency will depend upon the cleanliness of the airstream.
IMPORTANT: Exercise care when cleaning the coil as not to bend the fins.
Use a high powered vacuum, compressed air, non metallic brush applied in the direction of the
fins or a mild soap and water solution to clean the coil. Specialty coil cleaning products are
available. Cleaning the header and return bends with soap and water will also provide an initial
check for pinholes or cracks that may not be visible. Refrigerant leak detectors should be utilized for
DX coils.
NOTICE: Corrosion or deposits on copper or brazed joints may indicate
corrosive chemicals in the airstream. Baked phenolic coatings should be
considered if corrosive chemicals are present.
CONDENSATE DRAIN PAN CLEANING
The drain pan should be cleaned on a periodic basis, to prevent microbial growth, by a qualified
service technician.
CONDENSATE TRAP
Winter: Drain water from P-trap(s) during cold months or protect it from freezing. Fill the trap with
mineral oil to maintain air seal.
Summer: Prime trap with water before starting up a unit if the coil produces condensate,
otherwise fill the trap with mineral oil.
