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VIII. Maintenance
Kooltronic Water-Cooled Air Conditioners require no maintenance. Air-Cooled Air Conditioners are designed to
require only the routine cleaning of air filters to assure unimpeded air flow through the condenser heat
exchanger. It is not possible to recommend specific filter cleaning intervals since the level and the nature of
airborne particulate matter differs widely with each installation. It is generally sufficient to remove and wash the
reusable aluminum mesh air filters when the outer surfaces of these filters appear covered with a thin layer of dust
or lint. Filter recoating adhesive is recommended. Appropriate disposable filters are available from Kooltronic.
If filter service is neglected or delayed, the air conditioner will not perform at its design capacity. The first
indication of excessively clogged air filters is usually a gradual increase of temperature within the equipment
cabinet. If operation is continued under these conditions, the compressor will be shut off by the thermal overload
device. The compressor will restart when its external temperature drops below the protector threshold setting and the
compressor will continue to cycle on and off. Continued operation under these conditions will cause damage,
shorten compressor life and void the warranty.
A. Filter Removal and Service
Kooltronic Air Conditioners feature an easily removable inlet filter to facilitate necessary cleaning.
CAUTION
1) Lift the filter up by the bottom slot using a screw driver or similar tool. Pull filter toward you and downward
until the top of the filter clears the upper filter retainer.
2) After removal, the filters should be flushed under warm running water with the clean side up, driving
contaminants out the dirty side of the filter. If the accumulated dirt is oily, washing in a detergent bath is
recommended, followed by a warm water rinse as above.
3) The filters may be sprayed with
Kooltronic A-16 Filter Recoating Adhesive
to trap fine airborne
contaminants, or they may simply be dried and reinstalled as strainer type filters.
Recoating is
recommended for best results.
4) Reinstall the filter: (a) keeping the slot at the bottom, slide filter into the upper retainer, (b) press filter
against the unit and (c) slide down into lower retainer.
CAUTION
B. Blowers
The design life of the blowers employed in all Kooltronic Air Conditioners is substantially in excess of
20,000 hours. All Kooltronic condenser and evaporator blowers are equipped with UL/CSA permanently-
lubricated precision ball-bearing motors, with automatic-reset thermal overload protectors.
If field replacement of a blower motor is necessary, most blower assemblies, including mounting plate, are
readily removable. Each of the blower mounting plates is held to the air conditioner cabinet structure by
screws and nuts. For installation of the replacement blower, electrical connections may be broken at the
terminal block, or power leads may be cut and appropriately spliced together.
Before opening the air conditioner, disconnect all power.
Do not operate the air conditioner for extended periods of time with the filter removed. The
condenser coil may become clogged with dust or lint from the air entering the face. A
clogged condenser coil is not readily detected and will give the same reaction as a clogged
filter. A clean filter is the best protection.
