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i. Pull the knob out from the regulator to adjust pressure setting. Turn the knob clockwise
to raise the pressure, counterclockwise to lower the pressure.
ii. Close the isolation ball valve and allow device to depressurize through the restricted
venting orifice to pressure setting. Make adjustment to pressure setting using the knob,
then open the isolation ball valve to pressurize device and close the isolation ball valve
again to check pressure setting. Repeat process until desired pressure setting is
achieved.
NOTE: This process can only be performed when fire sprinkler system is at normal
operating pressure.
iii. Push knob back into regulator until it clicks into place.
iv. Once the nitrogen generator system has been commissioned, open the isolation ball
valve on the vent assembly. The Standard Vent is now open and actively venting oxygen
from the fire sprinkler system.
v. The isolation ball valve should remain open for approximately fourteen (14) days or
until the system nitrogen concentration reaches 98% or greater.
NOTE: Use a Handheld Gas Analyzer to verify the gas concentration inside the fire
sprinkler system.
vi. At the conclusion of the fourteen (14) day DPNI process, close the isolation ball valve.
NOTE: Failure to close the isolation ball valve after fourteen (14) days or once fire
sprinkler system nitrogen concentration reaches 98% will result in additional
oxygen corrosion damage to the system and unnecessary run time of the air
compressor and nitrogen generator.
vii. If the sprinkler system actuates or another event introduces oxygen to the sprinkler
system, the isolation ball valve must be opened again for a period of fourteen (14) days
to vent oxygen from the system.
c. SMART Vents:
i. Verify the timer settings inside the electric control box. The settings should be as
follows:
1) Mode set to E
2) Scale set to 20, 30, 40, 50, 60
3) Range set to 10h
4) Timer knob set to 35
5) If needed, a small flathead screwdriver can be used to adjust the timer settings.
NOTE: The green power switch on the electric control box must be in the ON
position and the Vent button pressed with both the green power switch
and the Vent button illuminated to adjust the vent pressure regulator.
ii. Pull the knob out from the regulator to adjust pressure setting. Turn the knob clockwise
to raise the pressure, counterclockwise to lower the pressure.
iii. Close the isolation ball valve and allow device to depressurize through restricted
venting orifice to pressure setting. Make adjustment to pressure setting using the knob,
then open the isolation ball valve to pressurize device and close the isolation ball valve
again to check pressure setting. Repeat process until desired pressure setting is
achieved.
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