Therma-Stor Products Group Santa-Fe Rx Free-Standing Dehumidification - Manual (Page 6)

2. Plug in the unit and turn the humidity control to ON. If the
compressor tries to start but cycles on the over load, go to
step 4. If the compressor remains silent, check for 110 volts
from compressor terminal R to overload terminal 3 using an
AC voltmeter. If voltage is resent, go to step 3. If there is no
voltage, either the pump safety switch, defrost thermostat,
low pressure control, or relay are open or there is a loose
connection in the continuity; see the appropriate section if a
defect is suspected.
3. Check continuity between overload terminals 1 and 3: if there
is none, the overload may be tripped. Wait 10 minutes and try
again. If there is still no continuity, it is defective and must be
replaced.
4. Unplug the unit, then replace the run capacitor with one of the
same microfarad rating and equal or greater voltage rating. If
such a capacitor is unavailable, a hard start kit sized for this
compressor may be used. If the compressor does not start
and run correctly, the compressor is defective and must be
replaced.
5.6A Replacing a Burned out Compressor
The refrigerant and oil mixture in a compressor is chemically very
stable under normal operating conditions. However, when an
electrical short occurs in the compressor motor, the resulting high
temperature arc causes a portion of the refrigerant oil mixture to
break down into carbonaceous sludge, a very corrosive acid and
water. These contaminants must be carefully removed otherwise
even small residues will attack replacement compressor motors
and cause failures.
Test the failed compressor oil with a test kit. If it indicates a burn-
out, follow EPA regulations for disposing of the old refrigerant
and oil. Follow standard procedures for replacing a burned-out
compressor. These would include replacement of the liquid line
filter/drier and addition of an oversized suction line filter/drier if it
was a running burn-out. Several changes of the liquid and suction
filter/driers may be necessary to cleanse the system.
5.6B Replacing a Compressor-Nonburn Out
Dispose of the old refrigerant per EPA guidelines. Replace the
compressor and liquid line filter/drier. Weigh in the refrigerant
quantity listed on the nameplate.
5.7 Humidity Control
The humidity control is an adjustable switch that closes when the
relative humidity of the air in which it is located rises to the dial
set point. It opens when the RH drops 4 to 6% below the set point.
5.8 Defrost Thermostat
The defrost thermostat is attached to the refrigerant suction tube
between the accumulator and compressor. It will automatically
shut the compressor off if the low side refrigerant temperature
drops due to excessive frost formation on the evaporator coil.
The blower will continue to run, causing air to flow through the
evaporator coil and melt the ice. When the ice has melted, the
evaporator temperature will rise and the thermostat will restart the
compressor.
5.9 Condensate Pump
Condensate is automatically pumped to a remote location when
the water level in the pump’s reservoir rises to close the float
switch.
The pump also contains a safety float switch. If the pump fails,
this switch opens the compressor control circuit and stops water
production before the reservoir overflows. The compressor will
stop, but the blower will not.
FOR HVAC INSTALLER ONLY
6 Santa Fe Rx Installer’s & Owner’s Manual