Perma Pure ZERO-AIR GENERATOR - Manual (Page 6)

5 Form #240
Zero-Air Generator Manual Rev 11/98
Maintenance
Routine maintenance on the ZAG consists of periodic
carbon replacement and outlet filter replacement.
Under normal, intermittent use, the desiccant should
last at least six months.
4.1 Activated Carbon/Alumina Replacement
The activated carbon canister is located behind the top panel. The top half of the
canister is exposed to allow visual inspection of the mixture. As the mixture is
used, its color changes from purple to brown. When ¾ of the canister has
changed to brown, replace the mixture. The mixture can not be regenerated and
must be discarded.
Replacing the mixture
1. Disconnect the three (3) air lines by loosening the ¼”
compression nuts with a 9/16” wrench. Hold the bulkhead
nut with a 5/8” wrench to prevent turning.
2. Remove the four (4) panel screws using a 1/8” Allen
wrench and pull the top panel out.
3. Remove the black plug from the bottom of the canister
using a 15/16” wrench.
4. Pour the pellets out, tapping the canister lightly to
remove any that may remain inside.
5. Re-fill the canister by slowly pouring in the fresh
activated carbon/impregnated alumina mixture. Tap the
side of the canister while filling to settle the mixture and
reduce air pockets.
6. Apply Teflon
®
tape to the plug and replace in the bottom
of the canister tightening fully.
7. Replace the top panel using the panel screws.
8. Re-connect the three (3) air lines to the bulkead fittings,
making sure to re-connect to the proper ports. Once
again, hold the bulkhead nuts in place using a 5/8”
wrench.
WARNING!! De-pressurize
and unplug the ZAG before
attempting any
maintenance or removing
the top or bottom panels!
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