Defrosting – Labconco FreeZone Triad Freeze Dry System 74000 Series User Manual
Page 31
Chapter 4: Operating Instructions
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5.
To remove a container after freeze drying is complete, turn the plastic
knob on the valve to the “VENT” position, which closes the valve and
vents the container. Should backfilling with an inert gas be required,
connect the gas supply line to the vent port on the valve before
turning the plastic knob on the valve to vent position. The sample
container may now be removed. In the vent position the bevel on the
valve knob should point away from the sample port.
6.
Ampules may be flame sealed while connected to a valve by using a
sealing torch. Care must be taken not to burn the valve. An
insulation material placed between the valve and the torch is
recommended.
Defrosting
After the freeze dry process is complete the ice that has accumulated on the
collector coil must be removed. The Triad Freeze Dry System is equipped
with a rapid defrost feature.
The following procedure should be followed when defrosting the collector
coil:
1.
Press the DEFROST button on the control panel. The defrost
indicator above that button will illuminate. Allow unit to operate in
this condition until all condensate is defrosted from the collector coil.
Turn the system off by pressing RUN/STOP button or it will
automatically shut off after 3 hours.
2.
Place the drain hose in a suitable container to collect the
condensation. Remove the drain plug from the drain hose.
3.
Replace drain plug and remove drain pan to dispose of the ice and
wipe dry.
4.
Press the DEFROST button, the indicator will be off.
5.
Wipe any excess liquid from inside of vacuum chamber, replace drain
pan.
Utilization of acid requires immediate cleaning and
neutralization after defrost or physical damage to the
collector chamber and coil will result.
Do not attempt to chip ice from the collector coil as damage
may occur.
Never attempt to start the vacuum pump when there is liquid
in the collector chamber. This could result in damage to the
vacuum pump.