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.
Summary of Contents for Divex SLS Mk IV
Page 2: ...Intentionally Blank...
Page 4: ...ii OM131 Approval Sheet P1939 OM 131 R11 Intentionally Blank...
Page 6: ...iv OM131 Preface P1939 OM 131 R11 Intentionally Blank...
Page 8: ...vi OM131 List of Abbreviations P1939 OM 131 R11 Intentionally Blank...
Page 10: ...viii OM131 Warnings P1939 OM 131 R11 Intentionally Blank...
Page 12: ...x OM131 Table of Contents P1939 OM 131 R11 Intentionally Blank...
Page 15: ...OM131 3 P1939 OM 131 R11 Chapter 1 Fig 1 1 SLS System Mk IV...
Page 16: ...4 OM131 Chapter 1 P1939 OM 131 R11 Fig 1 2 SLS system layout...
Page 32: ...20 OM131 Chapter 2 P1939 OM 131 R11 Fig 2 4 Two stage regulator Fig 2 5 Spool valve...
Page 42: ...30 OM131 Chapter 2 P1939 OM 131 R11 Intentionally Blank...
Page 53: ...OM131 41 P1939 OM 131 R11 Chapter 3 Fig 3 3 Hose Lanyards...
Page 54: ...42 OM131 Chapter 3 P1939 OM 131 R11 Fig 3 4 SLS System Mk IV Rear View...
Page 55: ...OM131 43 P1939 OM 131 R11 Chapter 3 Fig 3 5 SLS System Mk IV Front View...
Page 64: ...52 OM131 Chapter 3 P1939 OM 131 R11 Intentionally Blank...
Page 82: ...70 OM131 Chapter 4 P1939 OM 131 R11 Fig 4 7 Annual Maintenance Two Stage Regulator...
Page 86: ...74 OM131 Chapter 4 P1939 OM 131 R11 Fig 4 8 Annual Maintenance Single Stage Regulator...
Page 109: ...OM131 97 P1939 OM 131 R11 Chapter 5 Fig 5 2 Backpack Assembly Drawing P1939229S1...
Page 111: ...OM131 99 P1939 OM 131 R11 Chapter 5 Fig 5 4 Scrubber Housing Assembly Drawing P1939131S1...
Page 118: ...106 OM131 Chapter 5 P1939 OM 131 R11 Fig 5 9 SLS System Mk IV Gas Schematic Drawing P193940S1...
Page 123: ...OM131 111 P1939 OM 131 R11 Chapter 5 Fig 5 14 SLS System Mk IV Bottle Assembly...