BC1 and BC4X Evaporator Coil Installation Manual

0674398-00 / 507792-01BIssue 1835Page 8 of 8
Cleaning The Coil
1. Remove the coil from the cabinet or plenum, and take
the coil to an appropriate place to clean it.
2. Vacuum or brush the coil to remove matted and
surface debris from the ns. Use vacuum attachments
and /or brushes that are non-destructive to ns.
3. If oil deposits are present, spray the coil with a mild
household liquid detergent to soften deposits. Do
not leave the detergent on the coil for more than 10
minutes. Flush the coil thoroughly with potable water.
NOTE: For units in coastal regions, fresh water will
dissolve away any salt deposits. (Wash coils with fresh
water at least every six months.)
4. Spray the coil at a vertical angle of 30 to 45 degrees
with a constant stream of water at moderate pressure.
A pressure washer with a fan nozzle will work best. Do
not spray the coil from a horizontal direction.
5. Direct the spray so that any debris is washed out of the
coil and base pan. 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 dif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.
6. 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.
IMPORTANT
Maintenance
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, AAE recommends use of 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
A trained technician or service agency must perform
maintenance and service on equipment. At the beginning
of each heating or cooling season, indoor coils should be
cleaned.
Do not use hydrouoric acid, alkaline, or similar chemicals
on coils. These chemicals are not necessary to dissolve
salt, and may damage the n coating. Acid washes are
used to dissolve oils and greases, which generally are not
present on most installations.