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Section 12 - Air Side Leak Check Method
1.
First isolate the nitrogen generator from the fire protection system, by closing the ball valve located on the outlet
of the nitrogen storage tank. If no ball valve was installed, close the AMD valves installed between the sprinkler
system and the nitrogen generator.
2.
Record the time the nitrogen generator was isolated and the sprinkler system supervisory pressure. This will be
used to determine if there is a leak on the sprinkler system side.
3.
Power OFF the nitrogen generator.
4.
Isolate the Air Side section by closing both the Bypass Valve (Yellow Handle) and the Nitrogen "Inlet" Valve (Blue Handle).
5.
Exhaust all the gas by using the petcock on the bottom of the air storage tank. The air storage tank pressure
gauge should read zero (0).
6.
Power the nitrogen generator ON. The Power On light should be green.
7.
Allow the pressure to build to 105±3 PSI. Make note the time it takes to reach this pressure.
This should typically take less than 5 minutes for the NGP-1000D-M2/M3.
8.
If the unit reaches 105±3 PSI and does not stop, this could indicate a pressure switch issue.
9.
If the unit reaches 105±3 PSI and stops:
a.
Record the exact pressure.
b.
Allow the system to sit for 30 minutes. Recheck the pressure gauge to see if the unit has lost any pressure.
c.
If pressure is lost, soap piping connections and retighten any loose fittings.
d.
If no pressure is lost, go to Nitrogen Generator Leak Check Method.
e.
If the unit reaches 105±3 PSI and stops but it took longer than 5 minutes and no leaks are found
contact tech support.
10.
If the unit cannot reach 105±3 PSI, soap unit for leaks.