Sullair Heated Regenerative Dryer DEX-375

• Repeat all monthly inspections.

• Check the prefilter and afterfilter elements for correct installation and excess dirt.

• Check for tightness of flange bolting especially where high temperatures occur.;

• Replace seats and shaft seals on all butterfly valves.

• Replace seats and shaft seals on all ball valves.; • Dismantle the double-acting pneumatic actuators. Inspect internal components for visual signs of wear and replace parts as necessary.

• Dismantle and inspect solenoid valve internal components for visual signs of wear. Replace parts as necessary.

• Check the function of all temperature controls.;

Once a week, verify the operating sequence at vessel change over with that previously described in Section 5.4 and Section 5.5,

Once a week, verify the adsorption, regeneration heating, cooling and vessel change over times compared to that listed in Section 3.7

Weekly, check the dryer, prefilter and afterfilter for excessive pressure drop.;

• Verify the system is leak free.

• Verify the current draw of the regeneration heater.

• Verify the operation of all pressure gauges, temperature gauges, temperature switches and the dewpoint indicator. ;

Daily, verify the regeneration heater outlet temperature is correct and conforms to that listed in Section 3.7.

Daily, verify the prefilter automatic drain is functional.;