Page 20 - NG-1 100, NG-1 250, NG-1 500 - Wall-Mounted 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: For component locations, see Generator Configuration Diagram - Maintenance Section.
1. Verify the air maintenance devices (AMDs) have been set to the system operating or “high end” breathing pressure.
a. Ensure AMD is calibrated to operate with nitrogen generator pressures using the Air Maintenance Device (AMD) Pressure Adjustment Procedure in the Maintenance Section of this manual.
b. If an NG-1 100 or 250 nitrogen generator is connected to a single dry pipe or preaction system and an AMD is not installed, verify the nitrogen generator turn-off pressure is set at the sprinkler system supervisory gas operating pressure.
2. Important - Verify the nitrogen generator turn-on pressure is 3-5 psig (.2-.3 bar) below the air maintenance device set pressure/sprinkler system supervisory gas operating pressure.
3. Important - Verify the nitrogen generator turn-on pressure is 3-5 psig (.2-.3 bar) above the low air alarm set pressure.
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-min system fill time requirement.
5. Turn the cabinet power switch ON. The generator will begin filling the system with nitrogen.
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 Alarm indicator will flash.
If an AMD is not installed, proceed to step d.
b. Open the fast fill valve and close the regulated valve of all appropriate air maintenance devices (AMDs) 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.
TFP1273
Page 19 of 80