16
SEa lV2 Technical Maintenance Manual
3. Mate the threaded nozzle of the fill adapter into the open
fill port, and turn clockwise by hand until snug. DO NOT
apply a wrench or otherwise overtighten the fill adapter into
the first stage.
4. Loosen the fill adapter yoke screw as needed so that the
dust cap can be removed from the inlet fitting and the yoke
can be placed over the valve of the supply cylinder.
5. While supporting the SEA with one hand, place the yoke
of the fill adapter over the cylinder valve to align the inlet
fitting flush against the valve o-ring. Tighten the fill adapter
yoke screw clockwise into the small dimple on the backside
of the cylinder valve only until finger snug.
WARNING:
DO NOT attempt to fill the SEA from a supply
cylinder which contains more than 3,100 pSi/ 213.5 BaR.
Doing so may weaken and damage the safety burst plug
assembly and/or SEa cylinder.
NOTE
:
Part number 108382 does not have an on/
off valve; therefore, the pressure indicator gauge
and second stage are always active when the cylin-
der is pressurized.
6. While holding the first stage and fill adapter secure, turn
the valve handwheel counterclockwise until it is completely
open. When the handwheel is in the open position, the red
indicator ring is not visible.
7. Support the cylinder with one hand, and slowly turn the
supply cylinder valve handwheel counterclockwise to open
and begin filling. As the SEA cylinder begins to fill, make
sure the pressure indicator (pin or dial) shows that the cylin-
der is filling properly.
NOTE
:
Always fill the cylinder as slowly as possible
by turning the handwheel of the supply valve slowly
to control the rate of fill. Rapid filling will generate
heat and will result in an incomplete fill after the
cylinder cools. If the cylinder is warm to the touch
afterward, the fill rate was too rapid.
8. When at least two minutes have elapsed and air can no
longer be heard flowing from the supply cylinder into the
SEA, turn the supply cylinder valve completely open.
9. To conserve the limited air supply of the SEA, it is
strongly recommended that you perform a preflight inspec
-
tion of the second stage purge while it is connected to the
supply cylinder as follows:
a. Depress the purge button to ensure that sufficient
airflow is provided to clear the second-stage of water.
b. Immediately after releasing the purge button, listen
closely to ensure that the second-stage does not
continue to flow any air.
10. While holding the first-stage and fill adapter secure, turn
the SEA valve handwheel clockwise until it stops and the red
indicator is visible. Turn the handwheel of the supply cylinder
valve clockwise until shut.
11. Hold the second stage purge button depressed until air-
flow can no longer be heard from the second stage and the
LP hose between the first and second stages is completely
depressurized.
12. Slightly open the pressure relief screw on the fill adapter
to relieve the line pressure.
13. While supporting the SEA cylinder with one hand, turn
the yoke screw of the fill adapter counterclockwise to loosen
until the complete system can be lifted off and removed from
the supply cylinder valve.
14. While holding the SEA securely, turn the fill adapter
counterclockwise at the fitting to loosen and remove from the
first stage. Replace the dust cap over the inlet fitting, then
tighten the yoke screw until finger snug.
15. Thread the port plug back into the fill port until finger
-
tight.
