If you've measured a void in your CMS and have received additional material, follow the steps below to safely refill the sieve beds.
Refill Instructions:
Close the inlet valve supplying feed air to the nitrogen generator.
Turn off the generator using the system controller.
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Depressurize the sieve beds:
If your unit has valves on each sieve bed, open the valves located behind the pressure gauges until the pressure reads 0 PSI, then close the valves.
If your unit does not have these valves, carefully pull up on the safety relief valve at the top of each bed to release the pressure.
Slowly remove the inspection port plug on the top of Sieve Bed A, allowing any remaining pressure to escape.
Using a funnel, carefully fill the bed with CMS until the material reaches the top of the threads.
Reinstall the plug on Sieve Bed A.
Repeat steps 4 through 6 for Sieve Bed B.
Turn the generator back on.
Open the feed air inlet valve.
Allow the unit to run for approximately 1 hour.
Repeat steps 1 through 10 until no additional CMS material can be added to either bed.
Tip: Topping off may take multiple cycles of depressurization and running to allow the CMS to settle.
If you have any questions during this process, don’t hesitate to Contact Us for support.