Use
Dräger PSS BG 4 plus 13
3.3.5 Donning the closed-circuit breathing apparatus
1. Open the waist belt:
Pinch the latch together. Open the hook and eye.
2. Open both shoulder straps:
Press the adjusting clamp upwards with your thumb and
simultaneously with the other hand pull the long end.
3. Position the closed-circuit breathing apparatus upright and
hang the breathing hoses over the protective cover.
4. Reach your arms through the shoulder straps and lift up the
closed-circuit breathing apparatus.
5. Lift the closed-circuit breathing apparatus over your head,
position your head between the breathing hoses (figure A)
and allow the closed-circuit breathing apparatus to drop
onto your back until the shoulder straps are positioned on
the shoulders.
6. Uniformly pull down and tighten the shoulder straps so that
the padding on the waist belt rests on your hip (figure B).
7. Close the waist belt and adjust the width.
8. Pull the ends of the waist belt until the closed-circuit
breathing apparatus rests firmly on your hips.
9. Insert the ends of the waist belt in the loops on the right and
left-hand sides.
10. If required, loosen the shoulder straps slightly until
comfortable.
11. Check the position of the three reinforcing rings on the
breathing hoses and readjust if necessary: Fix the middle
ring with the hose support centrally on the shoulder. The
other reinforcing rings should also rest on the shoulder.
12. If the closed-circuit breathing apparatus has a connecting
piece with condensate trap, ensure that the sealing plug is
screwed securely into the connecting piece.
13. Fasten the full facepiece.
14. Remove the sealing cap from the connecting piece,
breathe in deeply and hold your breath.
15. Press the connecting piece into the connecting piece on
the facepiece until it engages.
16. Immediately after the connecting piece engages, open the
cylinder valve by at least two rotations and breathe out into
the closed-circuit breathing apparatus.
The Sentinel powers on automatically and runs a self-test
(see chapter 4.8 on page 29).
17. Use the display on the Sentinel to check that there is
adequate oxygen for the usage period in the cylinder.
18. Tightly squeeze the inhalation hose and breathe in until a
vacuum is produced in the full facepiece. Hold your breath
for about 10 seconds. The vacuum must be maintained; if
it is not, the harness on the full facepiece must be re-
tightened.
CAUTION
When carrying heavy loads on the shoulder, the
breathing hoses may be squeezed thus interrupting
the breathing circuit.
For this reason, the reinforcing rings must be in the
correct position during use as well.
WARNING
If a warning signal sounds, the cylinder valve is closed
or the compressed oxygen cylinder is empty.
If the warning signal continues to sound after the
cylinder valve is opened, the closed-circuit breathing
apparatus is not permitted to be used as no oxygen is
being supplied to the circuit. In this case, there is a risk
of a health hazard due to insufficient oxygen supply.
NOTICE
To ensure that the maximum usage period can be
achieved, the compressed oxygen cylinder must have
a charging pressure of at least 2600 psi/180 bar.
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Draeger Training 11/16 rev 1
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