Page 56 - NG-1 100, NG-1 250, NG-1 500 - Wall-Mounted Nitrogen Generator System Installation Manual

a. For best results, perform the calibration procedure at a temperature close to the temperature where analysis will occur.
b. Allow adequate time for the sensor to equilibrate to a new ambient temperature.
CAUTION: “CAL Err St” may result from a sensor that has not reached thermal equilibrium.
Nitrogen Generator Leak Monitor Adjustment Procedure
The nitrogen generator leak monitor configuration can be verified by checking the settings of the leak monitor alarm module in the nitrogen generator cabinet (See Generator Configuration Diagram).
1. Locate the Leak Monitor (Finder) Module in the nitrogen generator
2. Verify the module scale setting (white control) is set to ‘24h’
3. Verify the module timer setting (blue control) is set to ‘4’
4. If needed, a small flathead screwdriver can be used to adjust the controls.
NOTE: If adjustment needed, turn controls fully clockwise and then counter-clockwise before setting at the identified positions.
Nitrogen Production Flow Rate Check Procedure
The production rate of the nitrogen generator can be verified using the production flow meter in the nitrogen generator cabinet (See Generator Configuration Diagram).
1. With the nitrogen generator powered and in the nitrogen production mode:
a. Partially open the nitrogen production flow meter isolation ball valve to automatically
start the nitrogen generator.
NOTE: Adjust the position of the flow meter isolation ball valve so that the pressure indicated on the Pressure Transducer is approximately 15-20 psig (1-1.4 bar) and remains constant between the nitrogen generator’s cut-in and cut-out pressures.
b. Close the regulated and fast fill valves on the air maintenance device (AMD) to the fire sprinkler system(s).
c. Read and document the nitrogen production flow rate on the nitrogen production flow meter.
i. Flow rate indicated is in standard cubic feet per hour (SCFH).
ii. The production rate is measured using the center of the silver ball in the flow
meter.
d. Open the regulated valve on the air maintenance device (AMD) to the fire sprinkler
system(s).
e. Close the flow meter isolation ball valve.
f. Compare the nitrogen production flow rate with the nitrogen production values listed in
the following chart.
TFP1273
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