Therma-Stor Products Group Phoenix 200 HT - Manual (Page 3)

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is directed across the evaporator. This airflow lowers
the refrigerant pressure in the condenser and improves
dehumidifier efficiency. The relative reduction or slowing
of airflow across the evaporator allows more time for the
air temperature to be lowered to the dew point, which
also increased dehumidifier efficiency. These higher
temperatures are often found after the first 24 hours.
See Figure for correct grain control magnet position for
operating in temperatures above 90°F.
Figure 1: Defrost timer and grain control magnet position for
operating in temperatures above 90°F.
Between 50°F - 90°F - When the Phoenix 200 HT is used
in normal dehumidifier operating temperatures (70°F to
90°F), the grain control magnet should cover the bypass
openings.
This allows increased airflow across the evaporator and
increases performance by increasing the amount of air
that is dehumidified. This temperature range is often
found during the first 24 hours of a drying job. When the
Phoenix 200 HT is used in cooler operating temperatures
(50°F to 70°F), the grain control magnet increases airflow
across the evaporator and reduces frost formation. See
Figure 2 below for correct grain control magnet position for
operating in temperatures from 50°F to 90°F.
Figure 2: Defrost timer and grain control magnet position for
operating in temperatures above 50°F to 90°F.
Below 50°F -When the Phoenix 200 HT is used in very cool
operating temperatures (below 50°F), frost will form on
the evaporator coil as it dehumidifies. When enough frost
forms, the defrost thermostat will initiate the timed defrost
cycle. The cycle periodically turns off the compressor while
allowing the blower to run. The grain control magnet should
cover the bypass openings in this operating range because
the increased airflow and static pressure will help defrost
2.3 Condensate Removal
The Phoenix 200 HT is equipped with an internal
condensate pump to remove the water that is condensed
during dehumidification. This allows the condensate to be
pumped 20’ with the attached hose. If the condensate
must be pumped more than 20 feet above the unit, a
second pump must be added to relay the condensate. If
the pump fails and the unit must be used before it can be
replaced, the condensate can be drained by gravity.
The air inlet on top and the side outlet must be at least
foot from walls and other obstructions to air flow. If the
humid area is very large, dehumidification can be improved
by adding an outlet duct to circulate air to stagnant areas.
2.4 Ducting
A detachable rectangular exhaust collar is supplied to
allow 0” round lay-flat duct to be attached to the Phoenix
200 HT outlet. Lay-flat plastic ducting is available. See
accessories on page 6. To attach ducting to a collar, put
the plastic duct end through the collar center and roll the
duct end outward so that it overlaps the outside of the
collar. The duct and collar may then be quickly attached to
the Phoenix 200 HT by snapping the collar over the four
screws at the blower outlet.
2.5 Power Switch
The power switch (right of hour meter) lights up when
the unit is turned on. The unit will continue to run in
all conditions until the switch is turned off; there is no
dehumidistat. If the unit is going to run for more than 2
hours in an area below 50°F, the defrost timer should be
adjusted to improve performance.
2.6 Purge Switch
Pressing and holding the purge switch (left of hour meter)
will cause the condensate pump to run. This pump
minimizes the water left in the condensate reservoir prior
to moving or storage. Hold the switch in until the flow from
the condensate hose stops.
2.7 Hour Meter
The digital hour meter measures the cumulative time that
the unit is turned on to tenths of an hour. It stores its
total when the unit is unplugged; the previous total will be
displayed when the unit is next turned on. It resets to zero
after 99,999.9 hours of operation.
2.8 Temperature Specific Operation
Above 90°F - When the Phoenix 200 HT is used in high
temperature conditions (above 90°F), the refrigerant
pressure inside the condenser rises. By removing the
grain control magnet from the bypass openings, additional
airflow is directed over the condenser and less airflow