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Condensers and evaporator coils are constructed with copper tubes with mechanically bonded
aluminum fins. No maintenance is ordinarily required. If the air conditioner is used in a dirty
environment, periodic cleaning of dirt and debris from the outside fin surface may be required
to maintain design operating performance. Care must be taken during cleaning to prevent
damage to coil fins.
Periodic maintenance of the inlet filter will assure normal operation of your air conditioner.
As the compressors operating temperature increases above normal due to dirty or clogged inlet
filter (or plugged condenser coil), it will stop operating due to actuation of the thermal overload
cut−out switch located on the compressor housing. As soon as the compressor temperature has
dropped to within the switch's cut−in setting, the compressor will restart automatically. However,
the above condition will continue to take place until the inlet filter has been cleaned or replaced.
It is recommended that the power to the air conditioner be disconnected when abnormally high
compressor operating temperatures cause automatic shut−down of the unit. The above
described shutdown is symptomatic of clogged or dirty filters, thus causing a reduction in cooling
air flow across the surface of the compressor and condenser coil.
CONTINUED OPERATION OF THE AIR CONDITIONER WITH A CLOGGED OR DIRTY
FILTER WILL DAMAGE AND SHORTEN COMPRESSOR LIFE. The air conditioner features
an easily removable inlet filter to facilitate necessary cleaning.
1. Flush the filter with warm water from the exhaust side to the intake side. DO NOT USE
CAUSTICS.
2 After flushing, allow filter to drain. Placing it with a corner down will assure complete
drainage.
3. Recoat the filters with filter spray adhesive. Spray filter from both sides for maximum
concentration of adhesive. Filter spray adhesive is available from Hoffman Enclosure Inc.
(Hoffman catalog number AFLTAD)
It is impossible to recommend a filter cleaning interval due to the wide variety of air quality
conditions, as well as fluctuations in operating duty cycles of the air conditioner. Amounts of
airborne dust/dirt particles are different in every location. It is recommended that when a fine
layer of dust or lint is visible on the surface of the filter, it should be flushed, drained, coated with
proper adhesive and reinstalled.
Do not run the air conditioner for an extended period of time with the inlet filter removed. Particles
of dust, lint, etc. can plug the fins of the condenser coil which will give the same reaction as a
plugged filter. The condenser coil is not visible through the filter opening, so protect it with a clean
filter.
Replacement air filters are available from Hoffman Enclosures Inc. Order by air conditioner
catalog number, and description of filter. Contact Hoffman Customer Service.
8
CONDENSER AND EVAPORATOR
CONDENSER INLET FILTER
FILTER CLEANING INSTRUCTIONS
REPLACEMENT FILTERS
E 2005 Hoffman Enclosures Inc.
87567377
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