JFD Divex SLS Mk IV, Operation And Maintenance Manual

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OM131 59
P1939-OM-131 R11 Chapter 4
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As this regulator is non-venting the internal pressure should be released before adjustment and be
allowed to build up again after adjustment.
10. Check the flow through the regulator using the test flowmeter with the test connector plug
inserted in the injection orifice penetrator. With the supply set at 10 to 15 bar, the flowmeter
ball should lie between 1.0 and 2.0 lpm on the scale.
11. If not, check the condition of the inlet filter on the single stage regulator and if it is corroded or
clogged, replace the inlet filter fitting (Fig 4.8, Item 22) and repeat Step 9. to verify the correct
flow. If the problem persists check the condition of the filter on the helmet sideblock elbow.
Replace if necessary and repeat step 9.
12. If no further maintenance is to be performed, repack the SLS System ready for diving as
follows:
a. Reload the actuation cable assembly (See Section 3.4.4, page 49).
b. Recharge the gas cylinders with the appropriate heliox gas mix for the diving depth (See
Section 3.1.1, page 32).
c. Install a refilled scrubber canister and check the door seal (See Section 3.1.2 and section
3.1.1, page 37).
d. Replace and secure the outer door.
4.3.2 Monthly maintenance procedures
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The following checks can be conducted using breathing quality compressed air, thereafter the SLS
System should be purged with Heliox and prepared for re-use. Do not under any circumstance
attempt to dive with air as a gas mixture in SLS. Diver will become hypoxic very quickly.
4.3.2.1 Perform weekly maintenance
1. Carry out the weekly maintenance schedule in accordance with section 4.3.1 of this Manual.
4.3.2.2 Check scrubber door operation and sealing
1. Inspect the scrubber door, which is shown in Fig 4.9), for damage or wear. Replace any
damaged or worn components as necessary.
2. Lightly lubricate the main sealing O-ring (Fig 4.9, Item 7) on the scrubber door using an
oxygen compatible lubricant (e.g. Christo-lube fluorinated grease - Divex Part No SM034).
3. Visually check the scrubber door operation and the sealing arrangement.
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(1) Always ensure the CO
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scrubber canister is correctly installed prior to diving.
(2) Ensure that the scrubber door is not over-tightened.
(3) Do not swap scrubber doors between different backpack housings’. Scrubber doors are
individually factory set and marked with the SLS System’s serial number.