YMGI
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Your Modern Green Idea
38
YEARLY MAINTENANCE AND CLEANING
NOTE:
Use a mild biodegradable detergent 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 coil, and condenser coil, base pan, and drain passages.
Scheduled maintenance can be accomplished by either qualified 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 construction 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 1/4 bubble tilt to the outside and level
from right to left. Contact your sales person for detailed maintenance or cleaning instructions.
DO NOT USE COMMERCIAL GRADE COIL CLEANERS. SOME OF THESE CLEANERS MAY CONTAIN
ETHYLENE DIAMINE TETRACETIC ACID (EDTA) WHICH CAN SHORTEN THE LIFE OF THE
CONDENSER COIL.
Base pan and Condenser coil
Before cleaning the base pan and condenser coil, turn unit OFF 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 prevents water from entering the control area or the fan motor and damaging the
unit.
2. Spray condenser coil and base pan down with water. Next spray a mild biodegradable detergent onto
the condenser coil and base pan. Let set for five (5) minutes.
3. Rinse condenser coil and base pan with water again.
NOTE:
Make sure water pressure is no higher than that of an ordinary garden hose and the water
temperature is 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 base pan by wiping the base pan 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 base pan to inhibit bacteria growth. Ensure the algaecide is
compatible with wet coil operation and is not corrosive to the coil.
