Maytag Amana PTC A Series Service Instructions Manual page 34

MAINTENANCE
Vent - (Left Side Unit)
Cabinet Front
The cabinet front and discharge air grille can be cleaned with a
water dampened cloth . Under no circumstances should hy-
drocarbon-based cleaners (e.g. acetone, benzene, naphtha
gasoline, etc.) be used to clean the front or air grilles. Use care
when cleaning the control area.
YEARLY MAINTENANCE AND CLEANING
NOTE: Use a mild biodegradable detergent such as Simple
Green™ when cleaning the unit.
Special care must be taken to protect the unit's control board
and other electrical components from getting any water on them
while cleaning. The use of harsh or caustic cleaning agents or
materials such as bleach or coil cleaners that are not designed
for PTAC products will cause damage or deterioration of the
aluminum fin or coil material and is not recommended. Care
must be taken not to bend the aluminum fin stock.
Routine Scheduled Maintenance
To achieve continuing top performance and high efficiency,
establish a "once a year" cleaning/inspection schedule for the
unit. Take the unit out of the sleeve and thoroughly clean and
rinse. Be sure to include in the yearly cleaning the evaporator
coils, and condenser coils, basepan, and drain passages.
Scheduled maintenance can be accomplished by either local
maintenance staff or by an authorized servicer. They must
follow the instructions described in this manual.
Adverse Operating Conditions Maintenance
Units operating in dusty or corrosive locations; i.e. dusty con-
struction site or sea coast, must be cleaned more often. A
minimum of four (4) times a year will maintain proper opera-
tional conditions and protect unit components.
Wall Sleeve
Clean the wall sleeve while cleaning the unit. The caulking
around the sleeve should be checked to make sure that any
potential air and water openings around the sleeve are properly
sealed. The wall sleeve's level should also be rechecked.
Proper leveling for most installations are a ¼ bubble tilt to the
outside and level from right to left. Contact your sales person
for detailed maintenance or cleaning instructions.
34
Basepan and Condenser Coil
WARNING
DO NOT USE COMMERCIAL GRADE COIL CLEANERS.
SOME OF THESE CLEANERS MAY CONTAIN ETHY-
LENE DIAMINE TETRACETIC AICD (EDTA) WHICH
CAN SHORTEN THE LIFE OF THE CONDENSER COIL.
Before cleaning the basepan and condenser coil, turn OFF
unit mode switch and disconnect power to the unit. To discon-
nect power, either unplug the power cord at the wall outlet or
subbase, or disconnect power at the fuse box or circuit breaker.
1. Create a water-tight seal by tightly covering the entire con-
trol panel area and fan motor with plastic. Creating this
seal prevents water from entering the control area or the
fan motor and damaging the unit.
2. Spray condenser coil and basepan down with water. Next
spray a mild biodegradable detergent such as Simple
Green™ onto the condenser coil and basepan. Let set for
five (5) minutes.
3. Rinse condenser coil and basepan with water again. NOTE:
Ensure water pressure is no higher than that of an ordinary
garden hose and the water temperature no higher than
120°F.
4. Tilt the non-compressor side of the unit up no higher than
45 degrees and allow water to drain out the other side of
the unit.
5. Remove excess water left in the basepan by wiping the
basepan with a dry cloth.
6. Remove the water-tight seal from the motor and control
panel area.
7. Reinstall unit back into wall sleeve.
8. Allow unit to dry for 24 hours before reapplying power. When
power is reapplied test unit for proper operation.
9. Place a non-acidic algaecide in the basepan to inhibit bac-
teria growth. Ensure the algaecide is compatible with wet
coil operation and is not corrosive to the coil.
WARNING
HIGH PRESSURE AND HIGH TEMPERATURE CLEAN-
ING IS NOT RECOMMENDED. DOING SO COULD
DAMAGE THE ALUMINUM FIN STOCK AND ELEC-
TRICAL COMPONENTS.