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4. Verify the nitrogen generation/air bypass valve is nitrogen generation position.*
* The only time the nitrogen generation/air bypass valve should need to be in the “air bypass”
position is for the NFPA 13 30-minute system fill time requirement.
5. Turn the cabinet power switch ON (if not already On). The generator will prompt to complete the
commissioning process through the HMI. See Commissioning Section for procedure.
NOTE: The nitrogen generator incorporates an 8-second delay upon nitrogen generator start for
protection of the integral air compressor.
System Filling Procedure
The sprinkler system(s) can be filled using one of two filling methods based on whether the integral air
compressor of the nitrogen generator can meet the NFPA 13 30-minute fill requirement.
• Filling with Integral Air Compressor - When the sprinkler system size is within the limitations of
the nitrogen generator’s integral air compressor.
• Filling with Separate Air Compressor - When the sprinkler system size exceeds the nitrogen
generator’s integral air compressor limitations.
1. Filling with Integral Air Compressor
a. Turn the nitrogen generation/air bypass valve to the “air bypass” position.
NOTE: Bypass indication on HMI screen will be displayed.
If AMD’s is not installed, proceed to step d.
b. Open the fast fill valve and close the regulated valve of all appropriate air maintenance
device (AMD)’s necessary to fill the sprinkler system(s).
c. Close the fast fill and regulated AMD valves on any system not being filled.
d. Start the nitrogen generator.
e. Once the sprinkler system(s) obtain the desired pressure:
i. Turn the nitrogen generation/air bypass valve to the “nitrogen generation”
position.
NOTES: Bypass Alarm indication on HMI screen will be extinguished.
If AMD’s not installed, filling process is complete.
ii. Close the appropriate AMD fast fill valve and open the AMD regulated valve.
iii. Open AMD regulated valves that were previously closed on any systems not being
filled.
f. Initiate the fourteen (14) day nitrogen inerting process (See Nitrogen Inerting Process).
g. Once the nitrogen inerting process is completed, the nitrogen generator will continue to
automatically operate when any of the associated sprinkler systems require nitrogen.
2. Filling with Separate Air Compressor
a. Close the nitrogen supply line ball valve from the nitrogen generator.
b. Open the air supply ball valve from the separate air compressor.
NOTE: If AMD’s is not installed, proceed to step e.
c. Open the fast fill valve and close the regulated valve of all appropriate air maintenance
device (AMD)’s necessary to fill the sprinkler system(s).
d. Close the fast fill and regulated AMD valves on any system not being filled.
e. Once the sprinkler system(s) obtain the desired pressure:
i. Close the air supply ball valve from the separate air compressor.
ii. Open the nitrogen supply line ball valve from the nitrogen generator.
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