Freeze-dryer Delta 1-24 LSCplus
Freeze-dryer Delta 2-24 LSCplus
8 Maintenance and service
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Version 04/2013, Rev. 2.9 of 09/03/2020
• sb-dc
Translation of the original operating manual
8.1.8
Refrigeration system
WARNING
Risk of poisoning caused by the refrigerant
During its decomposition (e.g. due to naked flames or hot surfaces),
hazardous/toxic gases are released.
Contact with the decomposition products may cause severe damage to
health.
• Only qualified persons are authorised to perform work on the
refrigeration system of the freeze-dryer!
• Do not eat, drink, or smoke when working on the refrigeration system!
WARNING
Risk of cold burns or frostbite caused by the refrigerant
When work is performed on the refrigeration system of the freeze-dryer,
refrigerant may escape in the liquid or gas state and under high pressure.
In the case of skin contact with liquid refrigerant, cold burns or frostbite
may result.
• Only qualified persons are authorised to perform work on the
refrigeration system of the freeze-dryer!
The refrigerant circuit is a closed system. Only certified and qualified
persons are authorised to perform work on the refrigeration system!
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8.1.9
Vacuum sensor
NOTE
Please refer to the separate operating manual of the vacuum sensor!
The vacuum sensor has only a limited service life. Especially carbon-
containing substances, e.g. alcoholic compounds, reduce the service life
extremely.
• The vacuum sensor is maintenance-free.
• Remove any soiling on the outside with a cloth.
Capacitive vacuum sensors
Measurement drift due to long-term use, soiling or sudden aeration may
occur.
• Capacitive vacuum sensors must be adjusted at least once per year.
Depending on the actual conditions of use, shorter adjustment intervals
may be necessary.
