Decomposition Vessel Identification - IKA AOD 1.1 Mode D'emploi

Replacing the main seeling
The main sealing (item 4) is used to seal off the cover (item 2)
from the bottom part (item 1).
The main sealing and the sealing surface on the bottom part
must be checked for wear by an expert after each combustion
operation. The main sealing must be replaced if wear is evident.
• Remove the main sealing (item 4) by using a suitable tool to
pry the O-ring out of the groove in the cover (item 2).
• Pull the O-ring toward the side of the cover that is smaller in
diameter.
Make certain not to damage the cover with tool. This may cause
the decomposition vessel to leak. The sealing that has thus been
replaced may not be reused. Replaced the old sealing with a new
one from the set of O-rings.
• The new sealing is also mounted on the side of the cover
that is smaller in diameter. Place the O-ring on one side the groo-
ve in the cover.
• Use your fingers to pull the O-ring over the edge of the cover
until it snaps into groove on its own.
Perform a leak test after the decomposition vessel has been
assembled.
• Fill the decomposition vessel with oxygen (C 48).
• Hold the decomposition vessel with the cover upside down
in a vessel that is filled with water.
• Check the decomposition vessel for escaping bubbles of oxy-
gen.
The leak test does not replace pressure testing !
Replacing the crucible holder
The crucible holder must be replaced it if has become worn as a
result of the combustion operations.
• Open the decomposition vessel as described under
„Opening the decomposition vessel".
• Remove ignition wire and ignition electrode as discribed
before.
• Unscrew the hexagonal nut adjacent to the inside cover of
the crucible holder in a counterclockwise direction using the SW
5,5 double open ended spanner.
• Screw the crucible holder out of the cover.
Installation of the new crucible holder is performed in the rever-
se order. The crucible holder has to be aligned (see page 14)
before tightening the hexagonal nut (item 14). The hexagonal
nut is tightened only slightly with the spanner.

Decomposition vessel identification

The individual parts of the decomposition vessel are clearly iden-
tified by means of the engraved serial number and the technical
data. The data is in accordance with the regulation for pressure
device.
The individual parts of several decomposition vessels (cover, cap
screw and bottom part) are not interchangeable. If one of the
parts indicated becomes damaged then the complete decomposi-
tion vessel has to be sent to the factory for testing.
Union nut
Cover
Upper part
Proof date
Typ
Seriel number
15