50
NOTE: Nitrogen purity and nitrogen production rate are inversely proportional in the nitrogen generator.
As nitrogen purity increases, production decreases. Increase nitrogen purity by turning Flow
Control Valve clockwise and decrease nitrogen purity by turning Flow Control Valve
counter-clockwise
Verify and document the nitrogen output purity concentration: __________________________
Verify and document the nitrogen production rate as indicated on the flow meter: __________________
Compare documented nitrogen output purity concentration and nitrogen production rate levels with the
Shop Test Report provided in the nitrogen generator.
1. Readjust nitrogen output purity level using Flow Control Valve, as necessary, to obtain nitrogen output
purity levels and nitrogen production rate comparable to the Shop Test Report, if discrepancies are
significant.
2. If unable to obtain comparable nitrogen output purity levels and nitrogen production rate, Contact
ECS.
Close the isolation ball valve to the internal flow meter.
Disconnect the handheld gas analyzer (PHGA-1) from the gas sampling port of the nitrogen generator.
Leak check all plumbing throughout the nitrogen generator, include the air supply from the air compressor
and the nitrogen supply to the fire sprinkler systems, repair any leaks found.
Verify and document that the no leaks exist in the nitrogen generator, air compressor supply line and fire
sprinkler supply line: Yes No
Verify and document bypass/nitrogen generation ball valve in the nitrogen generator is in the nitrogen
generation position: Yes No
Oxygen Removal Vents - PAV-D/DQ and PSV-D/DE
Verify and document the appropriate orifices for each venting device are available: Yes No
NOTE: Ensure the appropriate orifice is installed in the appropriate vent for each fire sprinkler system.
The restricted venting orifice size is determined by the sprinkler system capacity (gallons). The
restricted venting orifice ensures the oxygen removal process is completed in all fire sprinkler
systems within the same approximate timeframe and within typically fourteen (14) days.
PAV-D/DQ Standard Vent
Verify and document the model and serial number of each oxygen removal vent installed: Yes No
Determine the pressure setting of the backpressure regulator of oxygen removal vent
1. The backpressure regulator setting must be below the cut-in or turn-on pressure of the nitrogen
generator and above the low air alarm pressure of the fire sprinkler system.
Verify and document the appropriate orifice in the oxygen removal vent: Yes No
Install the appropriate orifice in the oxygen removal vent.
Adjust the backpressure regulator setting on the oxygen removal vent:
1. Open and close the isolation ball valve on the oxygen removal vent to determine the pressure
setting of the backpressure regulator.
2. Pull the knob out from the regulator to adjust pressure setting. Turn the knob clockwise to raise
the pressure, counter-clockwise to lower the pressure.
3. Repeat process until desired pressure setting is achieved.
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