Installation Instructions
Operating Instructions
1. The ECS Protector Manual Vent is equipped with a ball valve to be connected to the fire sprinkler riser. The
contractor must install a 1” outlet (welded or mechanical) to connect the vent assembly to the sprinkler system
on the system side of the main control valve (see Figure 2). The ball valve must remain in the closed position
until the ECS Protector Nitrogen Generator System has been commissioned.
2. Install the vent assembly in a level position. Recommended mounting height is between 5’-10’ (2-3m) above the
finished floor.
NOTE:
Piping to the vent assembly cannot be installed in a configuration that would trap water and prevent
drainage to the sprinkler system; a water trap impedes the ability of the vent assembly to vent oxygen
from the fire sprinkler system.
3. Inspection of the vent assembly should be performed after installation and hydrostatic testing of the fire
sprinkler system. 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 the condition of the in-line filter and checking for blockage in the “Y” strainer
and the restricted venting orifice.
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 the 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.
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 ball valve and allow device to depressurize through restricted venting orifice to pressure setting. Make
adjustment to pressure setting using the knob, then open ball valve to pressurize device and close 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.
6. Push knob back into regulator until it clicks into place.
7. Once the ECS Protector Nitrogen Generator System has been commissioned, open the isolation ball valve on
the vent assembly. The ECS Protector Manual Vent is now open and actively venting oxygen from the fire
sprinkler system. It should remain open for approximately 14 days or until the system nitrogen concentration
reaches 98% or greater. Use an ECS Protector Handheld Gas Analyzer to verify the gas concentration inside
the fire sprinkler system.
8. Close the isolation ball valve. Failure to close the manual ball valve after 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.
9. If the sprinkler system actuates or another event introduces oxygen to the sprinkler system the manual ball valve
must be opened again for a period of 14 days to vent oxygen from the system.
April 2020 - Rev 2
2
ECS PROTECTOR
MANUAL VENT
PAV-D
Engineered Corrosion Solutions • 11336 Lackland Road St. Louis, MO 63146 • Phone: 314.432.1377 • www.ecscorrosion.com