Page 25 - NG-1 1150, NG-1 1500, NG-1 2000, NG-1 3000 - Stand-Alone Nitrogen Generator System Installation Manual

START-UP PROCEDURE
Only qualified personnel should commission the new equipment into service once it is installed. Once the nitrogen generator has been configured, there should be no reason for re-adjusting. To start-up the generator or to put back in service, follow these steps:
NOTE:
1. 2. 3.
4. 5. 6.
7.
For component locations, see Generator Configuration Diagram - Maintenance Section.
Verify that the air compressor is functioning properly.
Verify that the automatic drain on the compressor is functioning properly.
Verify the air maintenance devices have been set to the system operating or “high end” breathing pressure.
Important - Verify the nitrogen generator turn-on pressure is 3-5 psig (.2-.3 bar) psig below the air maintenance device set pressure/sprinkler system supervisory gas operating pressure. Important - Verify the nitrogen generator turn-on pressure is 3-5 psig (.2-.3 bar) psig above the low air alarm set pressure.
Verify the nitrogen generator is in the nitrogen generation mode with the air inlet isolation ball valve and the nitrogen outlet isolation ball valve in the open position; and the air bypass isolation ball valve in the closed position.*
* The only time the nitrogen generator should need to be in the “air bypass” position is for the
NFPA 13 30-min system fill time requirement.
Turn the cabinet power switch ON. The generator will begin filling the system with nitrogen.
System Filling Procedure
The sprinkler system(s) is filled using the air from the air compressor connected to the nitrogen generator to meet the NFPA 13 30-minute fill requirement.
1. Close the nitrogen generator’s air inlet isolation ball valve and the nitrogen outlet isolation ball valve.
2. Open the nitrogen generator’s air bypass isolation ball valve. NOTE: Bypass Alarm indicator will flash.
3. Open the fast fill valve and close the regulated valve of the appropriate air maintenance device (AMD)’s necessary to fill the sprinkler system(s).
4. Close the fast fill and regulated AMD valves on any system not being filled.
5. Air compressor will start running.
6. Once the sprinkler system(s) obtain the desired pressure:
a. Open the nitrogen generator’s air inlet isolation ball valve and the nitrogen outlet isolation valve.
b. Close the nitrogen generator’s air bypass isolation ball valve. NOTE: Bypass Alarm indicator will turn off.
c. Close the appropriate AMD fast fill valve and open the AMD regulated valve.
d. Open AMD regulated valves that were previously closed on any systems not being filled.
7. Initiate the fourteen (14) day nitrogen inerting process (See Nitrogen Inerting Process).
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