Sullair SD-1050 Series, User Manual

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USER MANUAL
Models SD-820 to SD-1710 with DDS
Rev 04 – October 2005
17
4.3 REPLACEMENT OF THE DESICCANT
Desiccant life is determined by the care with which it is handled, the quality of filtered
inlet air provided and by its time in use. Be careful to not abrade (i.e., wear down) the
desiccant when installing it.
Proper filtering of inlet air, and constant pressure and
temperature, will also extend its life. In order to ensure trouble-free operation, we
recommend replacing the desiccant every 10,000 operating hours, or every 3 years.
The following considerations determine the life expectancy of desiccant:

Care in installation

Quality of input gas (e.g., air)

Constancy of flow and temperature

Whether full-service cycling or low-demand usage

Time in service.
The following clues will suggest that you examine the desiccant and consider its
replacement:

Discolorization of desiccant (e.g., oil residue, other contaminants): a brown or
yellow tinge indicates that the adsorbancy capacity of the desiccant has been
diminished

Frequent afterfilter replacement due to desiccant dust accumulation

Performance dew point rises.
Refer to paragraph 1.4 to determine the desiccant quantity required for your model of
dryer.

Close dryer inlet/outlet isolation valves

Depressurize and move the power switch to DRYER OFF
Danger!

Wear protective equipment when handling desiccant

Remove the desiccant drain port plug on each desiccant chamber and empty the
old desiccant into a container
Danger!