Replacing The Desiccant; Reactivating The Desiccant - Teledyne 2105 Installation And Operation Manual

2105 Interface Module
Section 4 Maintenance
4.2.1 Replacing the
Desiccant
Cartridge
4.2.2 Reactivating the
Desiccant
Silica gel
4-2
The desiccant is contained in a cartridge located on the side of
the 2105. To remove the cartridge, unscrew the collar and slide
the cartridge out of the 2105. The clear tube reveals the silica gel
desiccant inside.
To replace the silica gel desiccant:
Collar
1. Hold the cartridge upright with the collar at the top.
2. As shown in the margin, push the collar off the cartridge.
3. Empty the saturated silica gel beads or granules.
4. Fill the tube with new (Isco P/N 099-0011-03) or reacti-
vated (see Section 4.2.2) silica gel desiccant.
5. Press the collar onto the tube.
6. Slide the cartridge into the 2105. Tighten the collar to seal
the cartridge in place.
Silica gel beads and granules of desiccant can be reactivated.
Desiccant may produce irritating fumes when heated. Observe
the following precautions:
• Use a vented oven in a well ventilated room.
• Do not remain in the room while the regeneration is taking
place.
• Use the recommended temperature. Avoid heating the
desiccant at higher than recommended temperatures.
There is the potential of irritating fumes coming from the des-
iccant during reactivation. Because of this, we urge you to use
caution, and to heat the desiccant in a well ventilated room.
Material Safety Data Sheets are in the back of this manual.
The desiccant's ability to remove moisture may lessen with each
saturation/reactivation cycle, resulting in a need for more fre-
quent service. After several cycles, the desiccant may no longer
be effective as it saturates too quickly. At this point, replace the
desiccant.
To reactivate the silica gel desiccant, pour the spent desiccant
into a heat resistant container. Never heat the cartridge
assembly; it will melt. Heat the silica gel in a vented convection
oven at 212° to 350°F (100° to 175°C) for two to three hours, or
until the blue or yellow color returns. Allow the desiccant to cool
and store it in an airtight container until ready for use.
CAUTION