JFD B44771, Operation And Maintenance Manual, Page: 52 / 136

40 OM131
Chapter 3 P1939-OM-131 R11
3.2 P
RE
-
DIVE PROCEDURES
(B
ELL CHECKS
)
1. With personnel in the bell, ensure that the actuation cable is in place, the counterlungs are
properly packed and that the spoon valve is in the stand-by position with the cable bullet
visible.
2. Ensure that the gas cylinders are charged with the correct gas mix for the dive depth (see
section 3.1.1 for details).
3. Ensure that the gas cylinders are charged to the correct minimum pressure for the diving
depth (see Table 3.2 for details).
4. Remove the outer side door and the CO
2
scrubber door.
5. Remove the CO
2
scrubber canister and check that the inside of the SLS System is dry.
6. Check the CO
2
scrubber canister serial number with the Dive Supervisor.
7. If all is ok, replace the scrubber canister. If wet, replace the CO
2
scrubber canister with a
spare.
N
OTE
Canisters should be routinely replaced with a refilled canister after 24 hours in the SLS System.
8. Replace the CO
2
scrubber door, ensuring that it is correctly sealed. Replace the outer side
door.
9. Ensure that the SLS System mouthpiece is stowed correctly within the helmet interface.
10. Check that gauge and overpressure indicator hose lanyards are secured to harness (see Fig
3.3 for details)
11. Ensure that gas is available at the helmet primary demand regulator then don the backpack
and helmet.
12. Connect the inhale / exhale hoses on the backpack to the helmet.
13. Connect the single stage regulator hose to the helmet side-block quick-connect.
14. Check that the overpressure indicator is indicating green.
N
OTE
Do not dive the SLS System if the overpressure indicator remains red.
15. Connect the SLS System hot water supply hose to the splitter block just prior to the diver
leaving the bell.
16. Connect the gas heating hose from the SLS System to the shroud if diving at depths in
excess of 200 msw or if required by conditions.
17. The diver should now be ready to leave the bell.