Freeze-dryer Alpha 1-4 LDplus
Freeze-dryer Alpha 2-4 LDplus
6 Operation
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Version 11/2006, Rev. 2.2 of 17/10/2016
• sb
Translation of the original operating manual
Warm-up vacuum pump
Prior to a freeze-drying process, the vacuum pump usually needs to warm
up in order to reach its operating temperature.
For this purpose, the warm-up phase can be started. The desired duration
can be preselected (see chapter 6.5.3.4 - "Options").
The following processes take place during the warm-up phase.
• The ice condenser is cooled.
• The vacuum pump is activated while the pressure control valve is
closed. If no pressure control valve is integrated, the drying chamber
must be separated from the vacuum pump by way of a manual valve or
similar.
After the preset warm-up time, the following information will be displayed:
Fig. 29: Message at the end of the warm-up phase
• Confirm the message and continue the process with the desired phase.
Aborting the warm-up phase
During the warm-up phase, the functions "Continue with phase" or
"Standby" can be selected by way of the left function key "mode".
Selecting one of these functions will abort the warm-up phase.
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