22
COMMISSIONING and 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 to adjust them.
Pre-Commissioning Information
Prior to setting the cut-in (turn-on) and cut-out (turn-off) pressures of the nitrogen generator, identify the
following sprinkler system pressures:
1. Sprinkler system operating pressure/Air Maintenance Device (AMD) pressure.
NOTE: When the nitrogen generator is connected to multiple dry pipe and preaction systems,
the fire sprinkler systems must operate at the same supervisory gas pressure.
2. Sprinkler system low air alarm pressure.
Once the sprinkler system pressures have been identified, determine the cut-in (turn-on) and cut-out
(turn-off) pressures of the nitrogen generator.
1. Important: The nitrogen generator cut-in (turn-on) pressure is to be 3-5 psig (.2-.3 bar) below the
sprinkler system operating/AMD pressure.
2. Important: The nitrogen generator cut-in (turn-on) pressure needs to be 3-5 psig (.2-.3 bar) above
the sprinkler system low air alarm pressure.
3. The nitrogen generator cut-out (turn-off) pressure is preset from the factory at 85 psig (5.9 bar)
which should be adequate for most applications. Should a higher cut-out (turn-off) pressure be
needed, adjust the cut-out (turn-off) pressure using the cut-out (turn-off) pressure adjustment
procedure.
Commissioning Nitrogen Generator
The nitrogen generator commissioning must be completed for the nitrogen generator to operate. See
Commissioning Section for procedure.
Start Up Procedure
To start up the generator or to put back in service, follow these steps:
NOTE: For component locations, see section 6.j., in the Maintenance Section for Generator Configuration
Diagrams.
1. Verify that the air compressor is functioning properly.
2. Verify that the automatic drain on the compressor is functioning properly.
3. 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 Pressure Adjustment Procedure (section 6.e.) in the Maintenance
Section of this manual.
4. Important: Verify the nitrogen generator turn-on pressure is 3-5 psig (.2-.3 bar) psig below the
AMD set pressure/sprinkler system supervisory gas operating pressure.
5. Important: Verify the nitrogen generator turn-on pressure is 3-5 psig (.2-.3 bar) psig above the
sprinkler system low air alarm set pressure.
6. 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.
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