BUCHI Extraction Unit E-816 HE - Manual (Page 46)

7 Maintenance and repairs
46 E-812/816 Hot Extraction Operation Manual, Version B
7 .3 .2 Replacing the seals
Seals are subject to wear and tear, thus you should check them regularly and replace them, if neces-
sary. To replace the seals, proceed as shown in the figures belows:
Fig. 7.2: Replacing the seals
7 .3 .3 Condenser
Unscrew the condenser connections, remove the condenser and place it in a laboratory dish washer
for cleaning with a conventional agent.
Use an appropriate cleaner to remove possible contaminations adhering to the condenser spiral, e.g.
algae. Let the spiral soak for a while.
NOTE
To remove the condensers moisten the seal with water.
7 .3 .4 Flushing the tank valve
The tank valve has to be flushed in regular intervals to prevent clogging.
For this purpose, we recommend to carry out an extraction process with fresh solvent at least every
six months (or earlier, denpending on your extraction processes and frequency).
7 .4 Customer service
Only authorised service personnel are allowed to perform repair work on the instrument. These
persons have a comprehensive technical training and knowledge of possible dangers which might
arise from the instrument.
Addresses of official BUCHI customer service offices are given on the BUCHI website under:
www.buchi.com. If malfunctions occur on your instrument or you have technical questions or applica-
tion problems, contact one of these offices.
The customer service offers the following:
• Spare part delivery
• Repairs
• Technical advice