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Product Service: Domestic 1-800-522-7658, International 816-333-8811
Chapter 4: Using Your Freeze Dryer
Manual Start-Up
Turn the MAIN POWER switch ON and the LCD
display will illuminate. If the unit is equipped with
the optional purge valve, the green annunciator
above the PURGE switch will illuminate indicating
that the purge valves are closed.
To manually run the freeze dry process press the
REFRIGERATION MAN switch. This will start
the refrigeration system. The green LED above the
switch will illuminate. When the collector
temperature reaches –40
o
C, the vacuum pump may
be started by pressing the VACUUM switch. If the
unit is equipped with the optional purge valve, the
vacuum pump may be started when the
REFRIGERATION MAN switch is pressed. The
purge valves must be closed, as indicated by the
green annunciator above the PURGE switch.
When the collector temperature reaches –40
o
C,
press the PURGE switch to open the purge valves
which connects the vacuum pump to the collector
chamber.
The LCD display will show the actual temperature
of the collector. When the vacuum in the system is
above 2000 x 10
-3
mBar the vacuum display will
indicate “HI.” At 2000 x 10
-3
mBar and below, the
LCD display will show the actual vacuum.
The Temperature and Vacuum Graph will indicate
collector temperature and system vacuum. When
the system vacuum is between 450 and
133 x 10
-3
mBar, the lower green vacuum graph
LED will flash. When the system vacuum level is
<133 x 10
-3
mBar, the green LED will be lit
steadily indicating that samples may be added.
