Vent Plug; Primary And Secondary Actuator Installation - CaptiveAire EWC Installation, Operation And Maintenance Manual

Vent Plug

The vent plug is factory-installed in the agent distribution supply line. The vent plug can be installed in the
outlet or run off a tee in the distribution pipe network. The vent plug must be installed from a horizontal to
vertically up position to ensure that it will open upon slight rises in pipe system pressure (e.g., due to
ambient temperature fluctuation).
The vent must not be installed below the horizontal position (e.g., pointing downward), or it may fail to
relieve pressure when required. One vent plug is required for each distribution pipe network.
Correct Orientation
Direction of
Pressure Flow
NOTE: When improperly installed, gravity pulls the vent plug closed, preventing small pressure
buildups from escaping.

Primary and Secondary Actuator Installation

Do not complete PAK or secondary valve actuator installation until system test and
commissioning are complete. The cylinder bracket includes a platform for securing a primary
actuator kit or secondary valve actuator during shipping and maintenance procedures. The
system actuators must be in the ship/test position for all commissioning and test procedures.
Testing with actuators in place will result in discharge of the agent cylinders.
Refer to "Start-up/Test Procedure" on page 60 for the testing and commissioning procedure.
6
1. Shipping Bolts
2. Nut
3. Valve Protection Plate
Figure 14 - Vent Plug Orientation
Direction of
Pressure Flow
WARNING!
Figure 15 - PAK in Ship/Test and Installed Positions
Ship/Test Position
1
5
Incorrect Orientation
Direction of
Pressure Flow
Installed Position
2
3
4
4. Mounting Bolts
5. Primary Actuator Kit (In Transport Position)
6. Supervisory Pressure Switch
13
Direction of
Pressure Flow