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Manual: NGP-300D
If no leak could be found in the nitrogen generator and the unit reaches its desired pressures in the allotted time, this indicates the
sprinkler system has a leak larger than the unit can handle in nitrogen generating mode. Isolate the fire sprinkler system and see
if the pressure drops. Nitrogen generators are designed for 1.5 PSI leak over 24 hours per NFPA 13’s new system leak rate, unless
specified otherwise.
To keep system in service the unit can run in Bypass Mode while arrangements are made to fix sprinkler system leaks. Note the
unit will alarm if left in Bypass Mode for longer than 1 hour. This can be silenced by pressing the button on the back of the Alarm
Horn. A LED will light on the back of the Alarm Horn. If the alarm is reset, the light will go out, and the Alarm Horn will sound if
another alarm occurs.
15. Sprinkler System Leak Check
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