67
Flushing the Distribution Pipe Network
Prior to starting the flushing procedure, inspect the complete pipe network, and replace any pipe or fittings
that have been subjected to direct flame or excessive heating. The following procedure describes flushing
the pipe network with a spare/test cylinder. The pipe network can also be flushed utilizing an external
water supply if available.
Flushing Procedure with Spare/Test EWC Cylinder
1. Check the pressure gauge on each cylinder to ensure it has been depressurized.
2. Remove the vent plug, clean thoroughly with warm soapy water, and rinse with water. Dry thoroughly
with dry air or nitrogen and set aside.
3. Install a pipe plug in the vent plug tee.
4. Disconnect the Primary Actuator Kit (PAK) stainless steel hose from the primary cylinder valve.
5. Remove all cylinders from the system. Refer to “Removing a Cylinder” on page 69.
6. Fill test cylinder(s) with water and pressurize. Refer to “Charging a Spare/Test Cylinder” on
page 74.
7. Install a test cylinder for each removed cylinder. Refer to “Installing a Cylinder” on page 74.
8. Attach a suitable container (or hose to a container or other point of disposal) at each pipe outlet where
a nozzle was installed to collect the water discharge.
9. Install the PAK. Refer to “Primary Actuator Kit (PAK)” on page 14.
10. Install the SVAs onto their respective cylinders. Refer to “Secondary Valve Actuator” on page 14.
11. Re-arm the control panel by placing the package in “armed mode.”
12. Connect the primary actuator hose securely to the Schrader valve port on the primary cylinder.
13. Activate the system using the manual release station.
14. Remove containers or hoses from all nozzle location pipe outlets.
15. Remove test cylinders.
16. Connect a nitrogen service tank to system piping service port and blow out the discharge piping to
remove all excess water. Disconnect the nitrogen service tank.
17. Install new or recharged cylinders at each cylinder location. Refer to “Installing a Cylinder” on
page 74.
18. Re-install vent plug and tighten until snug. Do not over-tighten.
19. Re-install nozzles, ensuring that all nozzles are in the correct location and properly aimed. Refer to
“INSTALLATION” on page 12 for nozzle placement and aim directions.
20. Complete the Start-up/Test Procedure. Refer to “Start-up/Test Procedure” on page 60.
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