Zirconia Oxygen Sensors are employed, one column of soda lime is provided and should be replaced (in the
same manner as Drierite) every five years for uninterrupted service.
Filter Media Replacement
Both Drierite and Soda Lime are hazardous substances. They can release nuisance dust in handling or during
use. They can cause eye, skin, nose, throat, and upper respiratory irritation. Please wear protective gloves,
protective clothing, eye protection, face protection and wash thoroughly after handling raw media. Please see
their specific Material Safety Data Sheets (MSDS) for complete information.
• Disconnect the air lines from the top and bottom of the column and remove it from its holding bracket.
• Unscrew the lid and remove the spring-loaded screen and filter pad.
• Pour out the used filter media (pink color change indicated).
• Add fresh filter media to the level just below the top output port and then tap the column on a hard
surface to pack and settle the material.
• Replace the filter pad, spring-loaded screen and firmly screw the lid on top of the column.
• Replace the column into the bracket and reconnect the air lines.
3.2.4 Ammonia Traps
These contain copper sulfate pentahydrate (CuSO
4
*5H
2
O) and is used to trap ammonia (NH
3
) gas which has a
negative impact on the service life of the Nafion Tube drier within the Universal Gas Conditioner. The filter
media is blue in color when active and changes to a ‘wet’ dark blue/aqua green when exhausted. Typically, two
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