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15
Cabinet Front
The cabinet front and discharge air grille can be cleaned with a
water dampened cloth . Under no circumstances should hydro-
carbon-based cleaners (e.g. acetone, benzene, naphtha gaso-
line, 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 operational
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.
Basepan and Condenser Coil
CAUTION
D
O NOT USE COMMERCIAL GRADE COIL CLEANERS.
S
OME OF THESE
CLEANERS MAY CONTAIN
E
THYLENE
D
IAMINE
T
ETRACETIC
A
CID (
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 disconnect
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 control
panel area and fan motor with plastic. Creating this seal pre-
vents 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 bacteria
growth. Ensure the algaecide is compatible with wet coil op-
eration and is not corrosive to the coil.
CAUTION
H
IGH PRESSURE AND HIGH TEMPERATURE CLEANING IS NOT RECOMMENDED.
D
OING SO COULD DAMAGE THE ALUMINUM FIN STOCK AND ELECTRICAL
COMPONENTS.
Clearance Check
Clearances around the unit should also be checked to make sure
that the intake air and discharge air paths have not become
blocked or restricted. A minimum of eight inches clearance is
needed from unit to furniture , beds, or other objects for proper
operation. Restricted discharge or intake air will reduce the unit’s
operational performance. In severe airflow restrictions damage
can occur to unit components such as the compressor, electric
heater or fan motor.
Maintenance and Cleaning
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