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3. The second component of the SMART Vent is the electric control box. The control box must be installed
on a wall or vertical surface adjacent to the vent assembly installation location.
4. Provide conductors from 120VAC/60Hz (200-240VAC/50Hz) power supply to designated terminals in
the electric control box in accordance with the applicable national and/or local codes (i.e. NFPA 70).
The device draws less than 2 amps. Contractor must drill hole in the control box to provide access for
the 120VAC/60Hz (200-240VAC/50Hz) power supply conductors.
5. Provide conductors to connect the 120VAC/60Hz (24VDC) coil leads of the electronic solenoid valve on
the vent assembly to the designated terminals in the electric control box in accordance with applicable
national and/or local codes (i.e. NFPA 70). Contractor must drill hole on side or top of the control box
to provide access.
6. The green power switch on the electric control box must remain in the OFF position until the nitrogen
generator has been commissioned.
7. Inspection of the vent assembly should be performed after installation and hydrostatic testing of the
fire sprinkler system. The inspection should be performed periodically thereafter in accordance with
the applicable national codes, NFPA codes and standards, and/or the authority having jurisdiction.
NOTE: Inspection must include verifying the condition of the inline filter and checking for blockage in
the Y-Strainer and the restricted venting orifice.
Operating Instructions
1. Verify the vent assembly has been equipped with a restricted venting orifice downstream of the
backpressure regulator.
NOTE: If the vent assembly is not equipped with a restricted venting orifice, one will be provided by
ECS during system commissioning. The restricted venting orifice must be installed before
proceeding with the steps below.
2. Determine the low air alarm pressure and turn-on pressure of the nitrogen generator.
3. Choose a pressure setting for the backpressure regulator that is above the low air alarm pressure but
below the turn-on pressure of the nitrogen generator.
NOTE: This process can only be performed when the solenoid on the vent is energized (power on and
VENT button pressed), and fire sprinkler system is at normal operating pressure.
4. Pull the knob out from the regulator to adjust pressure setting. Turn the knob clockwise to raise the
pressure, counter-clockwise to lower the pressure.
5. 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.
6. Push knob back into regulator until it clicks into place.
7. Verify the timer settings inside the electric control box. The settings should be as follows: mode set to
‘E’, scale set to ‘20, 30, 40, 50, 60’, range set to ‘10h’, and timer knob set to ‘35’. If needed, a small
flathead screwdriver can be used to make the timer setting adjustments.
8. Once the nitrogen generator system has been commissioned, open the isolation ball valve on the vent
assembly, turn the green power switch on the electric control box to the ON position and push the
orange VENT button. The button should now be illuminated.
9. The SMART Vent is now open and actively purging oxygen from the fire sprinkler system. It will remain
open for approximately fourteen (14) days. The orange VENT button will turn off when the vent is
closed.
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