JFD B44771, Руководство по эксплуатации и обслуживанию

Страница: 57 / 136

OM131 45
P1939-OM-131 R11 Chapter 3
The SLS System is actuated by the following actions:
1. Rotate the interface handle on the helmet and grasp the mouthpiece in the mouth.
2. Pull the actuation handle on the backpack harness.
N
OTE
If the actuation handle is not pulled the diver will run out of breathing gas as the system has now
become open circuit.
Following actuation, the diver should breathe normally through the mouthpiece. He should avoid
breathing through his nose. The nose block device in the helmet may be helpful for this purpose.
The first inhalation by the diver on the SLS System may require a little effort in order to activate the
demand regulator (biased 26 cm WG negative). However, once the counterlungs have filled,
breathing resistance is slight.
The sound of the exhaust valve (a distinctive ‘chip’) should be heard frequently, at the end of
exhalation. This confirms that bleed of make up gas is on line to the SLS system from the gas
cylinders.
N
OTE
This may take a couple of minutes to first occur following actuation.
3.3.2 Equipment lock transfer procedures
The SLS System backpack must be disconnected from the helmet prior to locking the system in or
out of a chamber complex or prior to compression / de-compression of a diving bell / chamber with
the SLS System inside. Disconnection must be carried out to prevent external compression which
could result in damage to the SLS System.
Gas cylinders should be charged prior to compression of the backpack to prevent the possibility that
external pressure could be applied to the cylinders and pipework. This could cause damage to the
o-rings.
N
OTE
Always use the supplied hose connector protection caps (Divex part no: D311) when moving the
helmet or backpack. These should be kept in pairs on a lanyard in the bell.
Do not rapidly pressures or de-pressurise the SLS system in equipment-locks or medi-lock. This will
permit gas spaces and voids to equalise safety and not damage the equipment.
3.3.3 Compression (Lock in) procedure for the CO
2
scrubber canister
1. Place the refilled CO
2
scrubber canister into the equipment lock and compress it.
2. Once inside, place the CO
2
scrubber canister into a plastic bag for storage prior to use. This
will keep the sodalime dry.
3. Care must be taken to ensure spare canisters are kept dry at all times.
N
OTE
Do not fit the CO
2
scrubber canister inside a plastic bag or other sealed containers before locking it
into the complex as the pressurisation will destroy the canister wire mesh during compression if the
bag is sealed.