JFD Divex SLS Mk IV, Operation And Maintenance Manual

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58 OM131
Chapter 4 P1939-OM-131 R11
4.3.1.3 Check actuation of SLS system backpack
1. Remove the outer door, scrubber door and CO
2
scrubber canister.
2. Actuate the SLS System by pulling the actuation handle.
N
OTE
The actuation effort should not exceed 10kg if the equipment is well maintained.
3. Check that the spool valve has actuated and that there is a bleed of gas into the SLS System,
by listening for a flow.
4.3.1.4 Check gas flow from single stage regulator
N
OTE
This should be done with the supply hose connected to the Helmet to ensure that the single stage
regulator inlet filter and the helmet side-block connector filter are not contaminated and restricting
the flow.
1. Connect the SLS System Backpack single stage regulator hose to the SLS System Helmet
sideblock and connect an AIR supply to the helmet.
2. Remove the blanking plug from the first stage regulator test port and insert the test gauge
(Divex Part No. DM32540) from the Tool and Test Kit.
3. Remove the scrubber door and CO
2
scrubber canister.
4. Insert the flowmeter connector (Divex Part No. DM32580) from the Tool and Test Kit into the
main supply penetrator.
5. Connect a breathing quality AIR supply directly to the umbilical hose on the SLS System and
set a supply pressure equal to the expected helmet supply pressure from the tables in chapter
3 of the SLS Helmet Manual OM112.
6. Blank the top port on the test flowmeter (Divex Part No. DM32580).
7. Allow the test hose to pressurise until the pressure stabilises.
8. Check the pressure gauge, which should read 138 mbar (2 psi).
9. If not adjust regulator by slackening locknut (Fig 4.8, Item 17, page 74) and using the Allen
key provided, move the regulator adjustment screw, until 138 mbar (2 psi) is reached and
tighten the locknut.
6 Counterlung Assembly CA2607
7 Weight Pocket D308
8 Handle Retaining Band D302
9 Rescue Lifting Point -
10 Cable Wiper Sleeve D328
11 Bush D322
Item Description Part No