Recharging An Ewc Cylinder - CaptiveAire EWC Installation, Operation And Maintenance Manual

Recharging an EWC Cylinder

Do not use any suppressing agent other than Liquid Fire Suppressant when refilling EWC
cylinders. Failure to use the correct agent could result in death, serious personal injury and/or
property damage.
1. Secure the cylinder in a chain vice, strap vice, or similar.
2. Ensure the cylinder has been hydrostatically tested, if applicable, and has been cleaned and
inspected.
3. Fill the cylinder with Liquid Fire Suppressant recharge P/N 87-300101-001. The EWC recharge is
factory filled to the correct quantity for refill. Ensure the complete contents of the refill are used.
4. Re-install a new or rebuilt valve/siphon tube assembly onto the cylinder and torque to 25 ft/lb. Refer to
"Rebuilding the Valve/Siphon Tube Assembly" on page 71.
5. Connect the external nitrogen supply to the cylinder valve outlet with a discharge adapter. Refer to
Figure 53.
6. Pressurize the cylinder with nitrogen to 200psig at 70°F. Refer to Table 23 for pressure variation with
temperature.
7. Turn off nitrogen supply and disconnect cylinder.
8. Remove the discharge adapter.
9. Check for leakage using a soap solution.
10. Immediately install the Anti-Recoil and Valve Protection Plates until the cylinder is ready to be
installed. Refer to "Installing Valve Protection and Anti-Recoil Plate" on page 69.
NOTE: Temperature is measured at the external surface of the cylinder, below the liquid level.
WARNING!
Table 23 - EWC Cylinder Pressure vs. Temperature
Temperature (°F)
50
60
70
80
90
Pressure (PSIG)
192
196
200
204
208
73