Desert Aire SelectAire Plus SP Series, Installation And Operation Manual

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• When cleaning the condenser open the normally closed condensate valve shown in
Figure 39. Close this valve when the cleaning process is complete.
• Filters should be inspected on a regular basis and changed as needed. Maintaining clean
filters is a cost-effective way to help maintain maximum coil performance and service life.
• Periodic inspection of the coil for signs of corrosion and for leaks is recommended. Small
leaks can be detected using a Halide torch. Repair and replacement of the coil and the
connecting piping, valves, etc., should be performed as needed by a qualified individual.
• Routine cleaning of the coil surface is needed to maintain optimum performance. Caution
should be exercised in selecting the cleaning solution as well as the cleaning equipment.
• Use of high-pressure water can cause damage to the fin surface. Low pressure water is
recommended when cleaning the coil. Improper selection can result in damage to the coil
and/or health hazards.
• Clean the coil from the leaving airside so that foreign material will be washed out of the coil
rather than pushed further in. Be sure to carefully read and follow the manufacturer’s
recommendations before using any cleaning fluid.
• The use of filter-driers in the system piping is recommended along with a sight glass that
has a moisture indicator. Replace the filter dryer(s) as needed. See Section 2.17
Note: Refrigerant conversions are beyond the scope of this manual and should only be performed by
qualified parties.
Surface loaded fibers or dirt should be removed prior to cleaning and/or water rinse to prevent further
restriction of airflow. If unable to back wash the side of the coil opposite that of the coils entering air
side, then surface loaded fibers or dirt should be removed with a vacuum cleaner. If a vacuum
cleaner is not available, a soft non-metallic bristle brush may be used while brushing with the fins,
typically vertically for RTPF coils. Coil surfaces can be easily damaged (fin edges bent over) if the
brush is applied across the fins.
Note: Use of a water stream, such as a garden hose, against a surface loaded coil will drive fibers,
dirt and salts into the coil. This will make cleaning efforts more difficult. Surface loaded fibers must be
completely removed prior to completing low velocity cleaning and water rinses.
Desert Aire - SP Manual