Therma-Stor Products Group 300 Electrical Requirements, Condensate Removal, Ducting, Power Switch

2.3 Electrical Requirements

The Phoenix 300 can be plugged into a grounded 15 Amp circuit. At 80°F, 60% RH, it draws 11.e Amps. Due to the high percentage of a 15 Amp circuit’s capacity that the unit uses, the circuit should be dedicated to running it only. Amp draw decreases at lower loads and increases at higher loads. At extremely high loads, a 20 Amp circuit may be required.

The unit briefly draws more amps to start if it has been stored in a cold area. This may cause a 15 Amp circuit breaker to trip. A 20 Amp circuit is recommended in such situations. Some models have a time delay to delay the compressor start about 2 minutes after the power switch is turned on. This reduces the unit’s starting amp draw by starting the blower and compressor at different times.

If an extension cord is required, it must have a minimum of 12 gauge conductors if 25 feet long or less and 10 gauge conductors if greater than 25 feet long.

2.4 Condensate Removal

The Phoenix 300 is equipped with an internal condensate pump to remove the water that is condensed during dehumidification. This allows the condensate to be pumped 30’ 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.

2.5 Ducting

A detachable 10” round exhaust collar is supplied that will allow a 10” round flexible duct to be attached to the Phoenix 300 outlet. The duct and collar may be quickly attached to the Phoenix 300 by sliding the 4 collar tabs into the slots around the blower outlet and rotating the collar clockwise. It may be quickly removed to transport the unit more easily.

2.6 Power Switch

The power switch (on left side 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.

2.7 Pump Purge Switch

This switch (on right side of hour meter) minimizes the water left in the condensate pump reservoir for moving or storage. Pressing and holding the pump purge switch will cause the condensate pump to run. Hold the switch in until the flow from the condensate hose stops.

2.8 Pump Fail Light

If the condensate pump fails, water draining into the pump reservoir will fill above its normal level. A safety float switch will then turn on the pump fail light (located next to the pump purge switch) and stop the compressor. This prevents water from overflowing and wetting the floor. The safety switch will not allow the compressor to restart until water has been removed from the pump reservoir.

2.9 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.

2.10 Defrost Control Adjustment

When the Phoenix 300 is used in a cool area, frost will form on the cooling 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 frost is melted by the air that the blower draws through the cooling coil.

The defrost cycle is automatic and designed for optimum performance above 50°F. If the unit is used in an area that is below 50°F for more than 2 hours, adjustment of the defrost timer is recommended to improve performance (see Sec. 2.10).

DRYING TIP: Air’s ability to absorb moisture from wet surroundings and the Phoenix 300’s ability to remove moisture from that air is greatly improved at higher temperatures. We recommend that the area to be dried be heated to over 70°F if possible. Less drying time will be required and efficiency will improve.

To adjust the defrost timer:

1.Unplug the unit.

2.Remove the front cover (6 screws).

3.The timer is fastened to the right inside panel. Every fourth peg around the dial is pushed out from the dial center except one section with 5 pegs out in a row. See figure 1. Each fourth “out” peg represents 15 minutes of compressor “off” time during every hour that the unit is in the defrost cycle.

4.To improve performance below 50°F, the compressor “off” time must be increased to 30 minutes per hour to allow the frost to completely melt. To do this, push the pegs out from the dial center so that the pegs alternate with 2 toward the center, then 2 out from the center, all the way around the dial except for the section now with 6 pegs out in a row (see Fig. 1).

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