Therma-Stor Products Group R175 Service, Storage, Troubleshooting, Technical Description

IMPORTANT: DO NOT operate the unit without the filter or with a less effective filter as the heat exchanger and coils inside the unit could become clogged and require disassembly to clean.

4.2 Storage

There are two issues to consider when the Phoenix R175 is stored between uses and both pertain to the water trapped in the unit: damage caused by freezing or biological growth. The effect 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.Walk out the hose to drain it completely

In order to reduce biological growth flush the unit with a biofungicide that is approved for use with copper, aluminum, polyethylene and ABS. To flush:

1.Run the hose to a drain

2.Plug in the unit but do not turn it on

3.Remove the air filter. Slowly pour a pint of the chemical through the top so that it drains into the heat exchanger

4.Use PURGE button to remove chemicals in reservoir. Run PURGE until hose runs dry

5.Walk out hose to drain completely

6.Replace air filter

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 accumulator after leaving the evaporator coil. The accumulator prevents any liquid refrigerant from reaching the compressor. The compressor evacuates the cool refrigerant gas from the accumulator and compresses it to a high pressure and temperature to repeat the process.

Figure 3: Refrigeration system

5 Service

WARNING: Servicing the Phoenix R175 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.

5.2 Troubleshooting

No dehumidification, neither hour meter display nor compressor run and POWER button does not turn ON.

1.Unit unplugged or no power to outlet

2.Defective control board

3.Loose connection in internal wiring

No dehumidification, neither hour meter display nor compressor run with POWER button ON.

1.Defective control board

2.Loose connection in internal wiring

5.1 Technical Description	Some dehumidification, air mover runs continuously but
	compressor only runs sporadically.
The Phoenix R175 uses a refrigeration system similar to	1.	Unit is in defrost cycle, DEFROST light on
an air conditioner’s to remove heat and moisture from	2.	Defrost thermistor defective or loose
incoming air and to add heat to the air that is discharged.
	3.	Loose connection in compressor circuit
Hot, high pressure refrigerant gas is routed from the
	4.	Defective compressor overload
compressor to the condenser coil. The refrigerant is cooled
	5.	Defective compressor
and condensed by giving up its heat to the air that is about
to be discharged from the unit. The refrigerant liquid then	6.	Defective relay
passes through a filter/drier and capillary tubing which	7.	Upper housing is not sealed to lower housing
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