AIR-COOLED FLUID COOLER
29 • Air-Cooled Condenser Manual
cleaner be used. Acid-type cleaners can be aggressive to the coil fins as well as surrounding
areas. Many sites do not allow the use of acidic cleaners for environmental reasons.
7.3.4 How to Clean
• The absolute best way to clean coils is from the inside out. This requires
disconnecting the power supply before working on the unit.
• The fan guards and fan blades must be removed to gain access to the coil surface.
• The sprayer can then be worked across the coil using the water/cleaning solution,
pushing the dirt and debris out the bottom of the coil. Although this does extend the
time involved, the results are well worth it. This method should be used at least
once a year.
• Spraying the coil from the outside repeatedly can push most of the dirt to the inner
section of the fins and continue to restrict airflow. Keep in mind you may not have
the luxury of shutting the unit(s) down for an extended time. A pre-scheduled
shutdown with the operator may be in order.
• If you are using a cleaner along with the spraying process, follow recommended
manufacturer instructions and be sure to rinse the coil thoroughly. Any residue left
on the coil can act as a magnet to dirt.
• Reinstall and secure the fan blades and fan guards after the cleaning is finished.
• Last, reconnect the power supply to the unit.
7.4 Electrical Control Enclosure
DANGER: The inside of the electrical control enclosure contains
high voltage components and wiring. Access should be limited to
authorized personnel.
Arc flash and electric shock hazard. Risk of electrical shock could
result in injury or death. Disconnect local and remote facility power
source before working within this equipment.
Wear appropriate Personal Protective Equipment per NFPA 70E
before working within unit.
Use voltmeter to make sure facility electrical power is turned OFF
before making any electrical connections. Failure to comply can
cause injury or death.
• Inspect electrical control enclosure box each year or after a short circuit occurrence.
• If there is an accumulation of dust and dirt, clean out the panelboard by using a
brush, vacuum cleaner, or clean lint-free rags. Avoid blowing dust into circuit
breakers or other components. Do not use a blower or compressed air.
• Visually check all contacts and connections to be certain that they are clean and
secure. Loose and/or contaminated connections increase electrical resistance
which can cause overheating. Such overheating is indicated by discoloration or
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