6.3
Part replacement
Introduction
In normal routine operation, the column requires only minor regular maintenance.
Blockage of the column can be identified by isolating the column. This is done by
setting flow path to bypass the column in UNICORN control and checking the back
pressure in the system.
If back pressure increases in the system, locate the blockage by systematically
isolating the different components in the line of flow. If back pressure increases due to
a blockage in the column then the procedures in this section must be used.
Changing the adapter distribution
unit
Step
Action
1
Disconnect the column inlet from the system.
2
Remove the column adapter unit by turning the head of the column
counterclockwise until the adapter unit lifts free.
3
Remove the adapter pre-filter top piece and the black securing O-ring. Lift
the adapter pre-filter housing free.
4
Use the plastic wrench to disconnect the length of tubing from the pre-filter
housing that connects the pre-filter housing to the distribution unit at the
bottom of the adapter.
5
Loosen the distribution filter unit by turning counterclockwise and remove
the distribution filter unit from the adapter body.
6
Insert a new distribution unit and tighten.
7
Reconnect the tubing of the new distribution unit to the pre-filter housing.
Use the plastic wrench to tighten a half turn.
8
Replace the pre-filter housing and secure with the black securing O-ring.
9
Insert the adapter unit in the column body, making sure the groove in the
adapter is in line with the hex screw in the column body.
10
Turn the head of the column clockwise until the adapter rests on the packed
bed.
11
Continue to turn the column head until the bed is compressed as much as
possible.
6 Maintenance
6.3 Part replacement
28
Adjustable Oligo Column Operating Instructions 28967444 AC
