Labconco FreeZone 4.5 Liter Freeze Dry Systems 77510 Series - Manual (Page 20)

Chapter 4: Using Your Freeze Dryer
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11.
Collector Temperature Graph Display – This display indicates the temperature of the
collector. The highest LED indicates the collector temperature is warmer than 10°C.
The indicators will sequence down when the temperature reaches 10, 0, -10, -20, -30, -
40°C. When the collector temperature is –40°C or lower the green indicator will light.
12.
Alarm Indicator – This red LED indicates that a system alarm has occurred. Press the
Menu Switch to display the alarm message on the LCD display.
13.
Main Power Switch – Turns the Freeze Dryer on or off. (Not shown, located on the
right side of the cabinet.)
Operation Checklist
The following checklist should be followed prior to each use of your Freeze Dryer:
1.
Wipe the interior of the collector chamber with a soft cloth or paper towel to
remove any accumulated moisture.
2.
Check the collector chamber drain hose to ensure that the hose is free of
moisture and that the drain plug is securely installed. The Freeze Dryer will
not start if moisture is detected.
3.
Using a soft, lint-free cloth or paper towel, wipe the collector chamber lid
gasket to remove any dirt and contaminants that could cause a vacuum leak.
Vacuum grease is not required on the lid gasket to obtain a proper vacuum seal.
4.
Check that each sample valve is closed or in the “vent” position.
Vacuum Pump Ballast Setting
Most vacuum pumps are equipped with a gas ballast mechanism. The freeze dry
process requires high vacuum. Therefore, it is recommended that the gas ballast be
closed during the operation of the Freeze Dry System. If the gas ballast is left
open for extended periods of operation, the oil can be pumped out the exhaust,
causing the pump to fail.
Operating the Freeze Dryer
Set-Up
The Freeze Dryer may be configured to automatically start the vacuum pump when
the collector temperature reaches –40°C. The display units for vacuum may be
selected to be mBar, Pascal (Pa) or Torr and the temperature may be displayed as
°F or °C. The run time of the refrigeration system and the vacuum pump may be
monitored.
To configure your Freeze Dryer, turn the main power switch ON and press MENU.
The display will show:
VACUUM UNITS
mBar
Pa Torr