Great Lakes Air Compressed Air Dryer GBS-1250

Warning: Only trained personnel should perform this maintenance

Check if the blower intake filter is clogged

Enter the filter differential in H²O

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

Is the blower discharge temperature elevated?

Select the condition of the blower

Sign off on the blower intake filter maintenance

Warning: This procedure requires trained personnel with PPE!

If desiccant is contaminated, it must be dealt with based on the amount of oil contamination.

Is the coalescing pre-filter in good condition?

Close preventative maintenance of the coalescing pre-filters will extend the life of the desiccant.

Is the desiccant drained through the desiccant drain port?

Spent desiccant is not hazardous and can be disposed of as a general landfill product.

Is fresh desiccant added through the desiccant fill port?

Always leave adequate room above the desiccant bed to permit some bed motion and expansion during dryer operation.

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, it will be blown out during the first hours of operation.

Is the volume of desiccant fines from startup high?

If the volume is high, it limits the life of the initial purge muffler element.

• 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: 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.

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

Is the purge flow adequate during low-pressure periods?

Sign off on the purge rate maintenance