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4 Maintenance
4.1 Air Filter
The Phoenix R125 is equipped with a pleated media air
filter that must be checked regularly. The standard filter
is a MERV-8 high efficiency filter. Operating the unit with
a dirty filter will reduce the dehumidifier’s capacity and
efficiency and may cause the compressor to cycle off and on
unnecessarily. The filter can generally be vacuumed clean
several times before needing replacement. Replacement
filters can be ordered from the manufacturer or purchased
locally if available
IMPORTANT: DO NOT operate the unit without the filter or
with a less effective filter the coils inside the unit could
become clogged and require disassembly to clean.
4.2 Storage and Freeze Protection
There are two issues to consider when the Phoenix R125
is stored between uses and both pertain to water trapped
in the unit. The first is biological growth and the second is
damage caused by freezing. The effects of the trapped water
can be greatly reduced if precautions are taken to remove
as much as possible before storage.
1. Use the pump PURGE button to reduce the water level in
the reservoir.
2. Stretch the hose flat to drain it completely. Raise one
end above your head and spool hose while draining
water out the other end.
3. To reduce biological growth flush the unit with a
bio-fungicide that is approved for use with copper,
aluminum and polyethylene. To flush:
a. Run the hose to a drain.
b. Plug in the unit but do not turn it on.
c. Remove the air filter. Slowly pour a quart of the
antimicrobial through the heat exchanger
d. Hold in the pump purge switch to reduce the water
level in the reservoir.
e. Flush with water.
4. If the unit will be exposed to freezing temperatures,
after purging, pull back the filter and pour 1 cup (8oz)
of a propylene glycol based anti-freeze through the heat
exchanger. It will flow down into the pump reservoir. Do
NOT purge the solution out of the unit.
Dirty filters should be changed prior to long term storage
to prevent biological growth on the filter.
5 Service
WARNING: Servicing the Phoenix R125 with its high
pressure refrigerant system and high voltage circuitry
presents a health hazard which could result in death, serious
bodily injury, and/or property damage. Only qualified service
people should service this unit.
CAUTION: Do not operate unit without the front housing in
place.
5.1 Technical Description
The Phoenix R125 uses a refrigeration system similar to
an air conditioner’s to remove heat and moisture from
incoming air and to add heat to the air that is discharged.
Hot, high pressure refrigerant gas is routed from the
compressor to the condenser coil. The refrigerant is cooled
and condensed by giving up its heat to the air that is about
to be discharged from the unit. The refrigerant liquid then
passes through a filter/drier and capillary tubing which
cause the refrigerant pressure and temperature to drop. It
next enters the evaporator coil where it absorbs heat from
the incoming air and evaporates.
The evaporator operates in a flooded condition, which
means that all the evaporator tubes contain liquid
refrigerant during normal operation. A flooded evaporator
should maintain constant pressure and temperature across
the entire coil, from inlet to outlet.
The mixture of gas and liquid refrigerant enter the
compressor after leaving the evaporator coil. The
compressor evacuates the cool refrigerant gas from the
accumulator and compresses it to a high pressure and
temperature to repeat the process.
Refrigeration system
