Chapter 4: Lyo-Works Operating System
Product Service 816-333-8811 or 1-800-522-7658
Operation Buttons
Operation buttons are displayed across the bottom of the Home screen.
PROGRAM – This button opens the PROGAMS screen described in the
next section.
MANUAL – Use this button to turn the collector & shelf control ON/OFF.
There are 3 different modes to choose from within the MANUAL function:
o Max Cold – This setting allows the shelf to be used to freeze
samples below -55°C, obtaining “Max Cold” (MC) temperature of
approximately -75°C. Max Cold should only be used for pre-
freezing samples, not for freeze drying, since the collector coil is
not being cooled in this mode.
o In-Flask – This setting is used to freeze dry pre-frozen samples
when using ONLY the sample valves on the left side of the unit.
There is no shelf temperature control in this mode.
o Shelf Temp Set Point – When using this mode the shelf
temperature will maintain the set point selected. The shelf
temperature may be set in the range from +50°C to –55°C in 1°C
increments.
VACUUM – Use this button to turn the vacuum pump ON/OFF or change
the vacuum set point value.
DEFROST – Use this button to turn the defrost mode ON/OFF. The
defrost function will turn off automatically if the collector temperature
reaches +60°C or if defrost has been running for 2 hours.
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