106
HELIX™
Manual (P/N 26291)
Chapter 6: Recharge
Rev A (February 2018)
HELIX™
PCU Fire Suppression System
8.
When the determined pressure is reached, tighten the Rupture Disc (P/N 09958) by applying a
torque wrench to the Recharge Adapter wrench and tightening
clockwise to 40 ft
-
lbs [54 Nm].
Shut off nitrogen supply. Relieve the pressure in the supply line. Remove Nitrogen Cylinder
(P/N 09956
-
R) from the Recharge Adapter (P/N 10270).
9.
Check for leaks by applying leak detect fluid or soapy water to the Rupture Disc (P/N 09958),
the Nitrogen Cylinder hex fitting threads, and the Nitrogen Cylinder pressure gauge threads.
Look for bubbles in the leak detect fluid. Bubbles may take several minutes to appear. Dry any
leak detect fluid from all surfaces and inside of rupture disc following leak detect. Reinstall
Shipping Cap on Nitrogen Cylinder.
Figure 6.2.9e
NOMINAL
PRESSURE
