BUCHI Scrubber K-415 - Manual (Page 30)

5 Putting into operation
30 K-415 Operation Manual, Version B
5 .5 Receiving vessel with outlet - Total Kjeldahl Nitrogen set (optional)
A receiving vessel with outlet a is optionally available. It serves for the digestion of samples with a
large water content. Using the drain cock b it is possible to drain the collected volume of liquid during
operation.
To install the optional TKN-set, proceed as follows:
• Attach the receiving vessel a with outlet to the condenser from below and secure it with the
catchpot clip c.
• Attach the provided hose to the outlet of the cock and secure it with a hose clamp. Connect the
other end of the hose to an appropriate collection tank or sink.
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Fig. 5.9 Connecting the TKN set
NOTE
During manual operation of the K-415 the cock of the TKN receiving vessel has to be kept closed -
otherwise the suction performance of the K-415 may not be sufficient to draw off all fumes produced
by the digester. The cock shall only be opened for a very short time while the receiving vessel is
discharged.
Manual operation:
1. Reduce the suction performance to a minimum.
2. Open the cock b of the receiving vessel.
3. Wait until the receiving vessel is completely emptied, then close the cock again.
4. Set the suction performance back to the previously used level .
Automatic operation:
1. Place an additional bigger vessel with sufficient capacity to the floor.
2. Connect the tube from the TKN set to this vessel.
3. Tighten the connection between the tube and the vessel (otherwise the suction capacity
of the scrubber will go down and will no longer be sufficient to draw off all fumes pro-
duced
by the digester).
4. The cock b of the receiving vessel a can now be left open permanently.