Sullair Heatless Desiccant Compressed Air Dryer SD-2750

· Check the desiccant for impurities and change it if necessary. A brownish / yellowish tone indicates that it has been soiled with oil. The desiccant has a normal lifetime of about 8000 operating hours.

· Check the screens installed in the unit for impurities and if necessary, clean them.

· Check the function of the inlet/exhaust valve combination by sending electrical control signals.

· Replace pilot air filter element.;

· Carry out a general visual check and watch out for possible disturbances during operation.

· Check the function by manually operating the automatic condensate drain on the pre-filter.

· Do an optical color test on the blue gel indicator for non-DDS dryers;

· Check the differential pressure on the pre-filter, which should not exceed 10 PSID. Values greater than this indicate that the filter cartridge must be changed.

· Check the differential pressure on the after-filter, which should not exceed 10 PSID. Values greater than this indicate that the filter cartridge must be changed.

· Check the backpressure at the silencer placed behind the exhaust valve combination; it should not exceed 5 PSIG. Use the gauge of the vessel that is to be regenerated.

· Drain inlet and exhaust valve chambers using valves provided below the valve (refer to photo attached).

· Drain pilot air filter housing of condensate (refer to photo attached).