Great Lakes Air Compressed Air Dryer GBS-3500

Warning: This procedure requires trained personnel with PPE!

Check for contamination of desiccant

If contamination is found, report to the maintenance team and stop the procedure

Check the condition of the coalescing pre-filters

Drain spent desiccant through the desiccant drain port in the bottom of each tank

Is the desiccant oil contaminated?

If oil contamination is found, deal with it based on the amount of oil contamination

Add fresh desiccant through the desiccant fill port

Check for adequate room above the desiccant bed to permit bed motion and expansion during dryer operation

Warning: The Blower Polishing and External Heated modes of operation require an adequate supply of purge air which is essential for proper regeneration of desiccant and good dewpoint suppression.

If your system pressure varies throughout the day, set the purge pressure at a low-pressure period so during those low-pressure periods the purge flow is not starved.

Always consult the factory prior to changing operating conditions.

Set the adjustable purge valve to the required value for equipment operating at standard conditions.

DO NOT operate the dryer with the purge valve closed the flow path is required in all modes for repressurization.

Sign off on the purge rate maintenance

• The Pre & After-filter element should be replaced whenever the pressure drop becomes excessive.

• Differential pressure is the best method to gauge the need for element replacement. The recommended maximum element differential is 10 PSIG.

• The pressure at which you should change your elements should be determined by comparing the operational efficiency of your system (Cost of pressure drop vs. cost or the elements).

• Many facilities put filter replacement on an annual or bi-annual schedule based on system contaminant load.

• Frequent inspection of the control air filter is required so desiccant particulate does not restrict the control air required for pneumatic actuation of dryer valves.

• The control air filter is generally replaced when the particulate after-filter on the dryer is replaced.;

Warning: This maintenance check requires trained personnel with PPE!

Blower intake filter changed within the last 4 months?

Enter the filter differential in inches of H²O

Is the filter differential below the maximum recommended 10” of H²O?

Any signs of clogged intake filters?

If there are signs of clogged intake filters, report the issue to the maintenance team and stop the procedure

Sign off on the blower intake filter maintenance

Warning: This maintenance check requires trained personnel with PPE!

Purge mufflers preventing high noise levels?

Muffler elements clogged due to desiccant fines?

Is there backpressure in the purge tower during operation?

If there is backpressure, replace the muffler element.

Desiccant dust accumulation prior to equipment startup?

If there is dust accumulation, clean the equipment.

High volume of desiccant fines from startup?

If there is a high volume of desiccant fines, replace the purge muffler element.