Therma-Stor Products Group 200 MAX User Manual

7

 

If sludge is evident in the discharge line, it will 
likely be found in the suction line; this indicates the 
compressor burned out while running. Sludge and acid 
have been pumped throughout the system. Several 
changes of the liquid and suction filter/driers will 
probably be necessary to cleanse the system.

5.  Correct the system fault that caused the burn out. 

Consult the factory for advice.

6.  Install the replacement compressor with a new 

capacitor and an oversized liquid line filter.

 

In a running burn out, install an oversized suction line 
filter/drier between the accumulator and compressor. 
Thoroughly flush the accumulator with refrigerant to 
remove all trapped sludge and to prevent the oil hole 
from becoming plugged. A standing burn out does not 
require a suction line filter/drier.

7.  Evacuate the system with a good vacuum pump and 

accurate vacuum gauge. Leave the pump on the 
system for at least an hour.

8.  Operate the system for a short period of time, 

monitoring the suction pressure to determine that the 
suction filter is not becoming plugged. Replace the 
suction filter/drier if pressure drop occurs. If a severe 
running burn out has occurred, several filter/driers 
may have to be replaced to remove all of the acid and 
moisture.

4.6C Replacing a Compressor- Non-Burn Out
Remove the refrigerant from the system. Replace the 
compressor and liquid line filter/drier. Charge the system 
to 50 PSIG and check for leaks. Remove the charge and 
weigh in the refrigerant quantity listed on the nameplate. 
Operate the system to verify performance.

The defrost thermostat is attached to the refrigerant 
suction tube between the accumulator and compressor. 
If the low side refrigerant temperature drops due to 
excessive frost formation on the evaporator coil, the 
thermostat opens. The compressor is then cycled off and 
on by the defrost timer. The blower will continue to run, 
causing air to flow through the evaporator coil and melt the 
ice when the compressor is off. When the air temperature 
and/or humidity increase, the evaporator temperature will 
rise and the thermostat will close to end the defrost cycle.
To improve performance in low temperatures, see Sec. 2.9 
for defrost timer adjustment.

Condensate is automatically pumped when the water level 
in the pump’s reservoir rises to close the float switch or if 
the pump purge switch is held in.
To replace the condensate pump:
.  Remove the metal strap holding the pump by loosening 

the 2 screws holding it in place.

2.  Disconnect the leads. 
3.  Installation is the reverse of above, but check that 

the plastic inlet and outlet hoses do not rub against 
copper refrigerant tubes.

If the condensate pump fails and cannot be replaced 
immediately, the Phoenix 200 MAX can be used by draining 
by gravity.
.  Unplug the unit and remove the front cover.
2.  Push the plastic plug on the right side (see Fig. 4) out 

from inside the unit.

3.  Locate the heavy vinyl hose that connects the drain 

pan to the condensate pump. Pull the end out of the 
pump.

4.  Push that end of the vinyl hose through the hole in the 

right side.

5.  Connect a garden hose and run it to a drain. Keep 

the hose as flat to the floor as possible to avoid air 
pockets that would hinder draining. Placing the unit on 
something above the floor will also improve draining.

The contacts of the single pole, single throw relay 
complete the power circuit to the compressor. The 
contacts are closed when power is provided to the relay 
coil via the control circuit. The control circuit includes the 
power switch, low pressure control, defrost thermostat and 
timer.