BUCHI Extraction Unit E-816 HE - Manual (Page 44)

7 Maintenance and repairs
44 E-812/816 Hot Extraction Operation Manual, Version B
7 .1 .4 Solvent tank
Empty the solvent tank after each extraction process. The solvent in the tank can be reused when
the extraction process was normal. In case of an incident during the extraction, the solvent can be
cleaned e.g. in a rotary evaporator.
NOTE
In case you empty the tank after you have already filled in the solvent for the next extraction, be
aware that the 10 ml of solvent in the receiving funnel are withdrawn as well, because the tank valve
has to be opened to empty the solvent tank.
In case it is not possible to empty the solvent tank automatically because of a software breakdown,
the instrument has to be opened manually by the emergency opening. For this purpose, proceed as
follows:
• Unscrew all screws on the back side of the
instrument and remove the back cover.
• Loosen the outer left screw cap (solvent feed
from the collection valve to the tank) and lift it
a little as to provide air to the system.