Instruction Manual

508269B01 Issue 2217 Page 9 of 9
1. Before beginning this or any other maintenance,
turn o󰀨 all power to the indoor unit at the main unit
disconnect switch. It is also recommended that you
wear personal protective gear: safety glasses and/or a
face shield, waterproof clothing and gloves.
2. Remove the coil from the indoor unit cabinet, and take
the coil to a place that is appropriate for cleaning it.
3. Vacuum or brush the coil to remove matted and surface
debris from the ns (dirt, hair, etc.). Use vacuum
attachments and /or brushes that will not damage the
coil ns.
4. Use only clean potable water to clean the coil. Clean
the coil from top to bottom.
NOTE: For units in coastal regions, fresh water will
dissolve away any salt deposits. (Wash coils with fresh
water at least every six months.)
Failure to follow instructions will cause damage to the
unit.
This unit is equipped with an aluminum coil. Aluminum
coils may be damaged by exposure to solutions with
a pH below 5 or above 9. The aluminum coil should
be cleaned using potable water at a moderate pressure
(less than 50psi). If the coil cannot be cleaned using
water alone, it is recommended to use a coil cleaner
with a pH in the range of 5 to 9. The coil must be rinsed
thoroughly after cleaning.
In coastal areas, the coil should be cleaned with potable
water several times per year to avoid corrosive buildup
(salt).
NOTE
5. Spray the coil at a vertical angle of 30 to 45 degrees
with a constant stream of water at moderate pressure
(less than 50 psig). A pressure washer with a fan
nozzle will work best. Do not spray the coil from a
horizontal direction.
6. Direct the spray so that any debris is washed out of the
coil and basepan. For most residential units, hot water
is not necessary.
NOTE: Attempting to back ush from the inside of the
coil will require removing parts from the unit, and it
may be very dicult to ush the whole coil surface.
Attempting to blow water through a coil will slow the
water stream and reduce the ushing action of the
outer n surface.
7. Replace the coil into the cabinet or plenum. Ensure
that you have followed the proper procedure for routing
and securing the refrigerant tubing.
Ensure that the distributor lines are not rubbing together
or kinked. All tubes must have enough clearance from
other metal parts. Use wire ties to secure tubes to
prevent movement that could cause the refrigerant
tubing to fail. Adjust the tubes as necessary.
IMPORTANT