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Maintenance Screen
The Maintenance Screen continuously tracks and records annual filter changes in the nitrogen generator.
After replacing filters, press and hold “Record Filter Change” button for five (5) seconds which records the
time and date of the filter change and resets the Filter Alert timer. The Maintenance Screen displays the
anticipated remaining life of the filters in hours of use.
NITROGEN GENERATOR EXCESS AIR ADJUSTMENT PROCEDURE
Air compressors used to meet the NFPA 13 30-minute fill requirement typically have a higher production
rate than the maximum feed rate of the nitrogen generator separation membrane. When using the same
air compressor to meet the NFPA 30-minute fill requirement and nitrogen production, the compressed air
rate to the separation membrane must be held below the air compressor cut-out (turn-off) pressure to
eliminate short cycling of the air compressor during the nitrogen production cycle. To prevent air
compressor cycling, an excess air bleed-off assembly is included in the nitrogen generator. The excess air
bleed-off assembly regulator is adjusted so that the air compressor operating pressure, when running in
the nitrogen production mode, is below the cut-out (turn-off) pressure of the air compressor allowing the
air compressor to operate continuously throughout the nitrogen production cycle.
1. If the air compressor’s air receiver tank pressure gauge and the excess air bleed-off regulator
gauge, when operating, are more than 10-15 psig (.7-1 bar) below the cut-out (turn-off) pressure
of the air compressor during nitrogen production cycle, decrease excess air bleed-off regulator
(turn regulator clockwise). This raises the relief pressure of the regulator by exhausting less air
thereby increasing the air compressor operating pressure resulting in increased nitrogen
production.
2. If the air compressor is cycling during the nitrogen production cycle, increase excess air bleed-off
regulator (turn regulator counterclockwise) until the pressure gauge on the regulator is
approximately 10-15 psig (.7-1 bar) below the cut-out (turn-off) pressure of the air compressor.
This lowers the relief pressure of the regulator by exhausting more air thereby decreasing the air
compressor operating pressure, resulting in sustained operation below the air compressor
cut-out (turn-off) pressure thus eliminating the air compressor short cycling.
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