Labconco FreeZone 4.5 Liter Freeze Dry Systems 77510 Series - Manual (Page 25)

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 left 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 fill
the chamber above the collector coil as water will enter the vacuum standpipe
and drain into the vacuum pump.
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.
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