Labconco FreeZone Plus 4.5 Liter and FreeZone -105 C Cascade Freeze Dry Systems 73870 Series - Manual (Page 26)

Chapter 4: Using Your Freeze Dryer
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5.
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.
Shut Down
At the end of a run or when a sufficient amount of condensate accumulates
on the collector coil to obstruct the flow of vapor to the collector chamber,
the Freeze Dryer should be defrosted. First, release system vacuum by
turning the plastic knob on a valve to the open position or by pulling the
collector chamber drain plug out of the drain hose. Now press the Vacuum
Switch on the control panel to turn the vacuum pump OFF. Press the
Refrigeration Switch next to the illuminated LED to turn OFF the
refrigeration system. Turn OFF the Main Power Switch on the right hand
side of the cabinet.
Defrosting
The following procedure should be followed when defrosting the collector
coil:
1.
Pull the collector chamber drain hose out from the right hand side of the
freeze dryer and remove the drain plug. Place the drain hose in a suitable
container to collect the condensate that will melt off the collector coil.
2.
Remove the collector chamber lid and allow ambient room air to melt the
ice. Dispose of the liquid appropriately.
3.
Flush the collector chamber with water and wipe chamber dry.
4.
If rapid defrost is desired, pour warm water over the collector coil. Do
not allow the liquid to enter the vacuum port on the upper rear of the
chamber.
5.
Reinstall the drain hose plug and slide drain hose back into the side of the
cabinet. Dispose of the liquid appropriately.
Utilization of acid requires immediate cleaning and
neutralization after defrost or physical damage to the
collector chamber and collector coil will result.
Do not attempt to chip ice from the collector coil as
damage may occur to the coil.
Never attempt to start the vacuum pump when there is
liquid in the collector chamber. This could result in
damage to the vacuum pump.