Dräger PSS BG 4 RP, Instructions For Use Manual

Page: 63 / 78

Maintenance
63
en
4.4.10 Fitting the breathing hoses
When fitting the breathing hoses, observe the following:

The breathing hoses should not be twisted.

The marks ("A") on the breathing hose and connecting
piece are 90° offset. The connector points upwards.
1. Slide three reinforcing rings over each of the two breathing
hoses.
2. Slide a bayonet ring over the ends of each of the two
breathing hoses.
3. Slide the sealing cuff on one breathing hose, marked "A" (A-
1), onto the breathing air cooler connecting piece.
4. Slide the other sealing cuff (A-2) on this breathing hose onto
the short connecting piece (A-3).
5. Slide the short sealing cuff on the other breathing hose (A-5)
onto the connecting piece on the CO
2
absorber.
6. Slide the sealing cuff on this breathing hose, marked "A" (A-
4), onto the connecting piece grommet, marked "A".
7. Secure the ends of the breathing hoses with bayonet rings:
Slide bayonet rings over the sleeve and connector and turn
until they engage.
8. Fasten both breathing hoses with safety loops onto the
shoulder straps (figure B). Do not pull on the safety loops.
Push the ends of the loops under the hoses.
4.5 Leak-tightness and functional test of the
closed-circuit breathing apparatus
Perform the leak-tightness and functional test before initial
commissioning and after every maintenance operation.
If the CO
2
absorber is installed in the closed-circuit breathing
apparatus, the functional test can be performed a total of six
times whereby testing should not take longer than 15 minutes.
After these 6 tests, the CO
2
absorber must be replaced and is
no longer permitted to be used.
NOTICE
After assembly, the storage time of the CO
2
absorber
is reduced to 6 months, even if breathing bag,
breathing hose and pressure relief valve are
connected and the breathing circuit is sealed with the
R 33 588 sealing cap.
33021851.eps
! ! ! !
33121851.eps
B A
1 5
4 2 3
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WARNING
If a fault is detected during the leak-tightness and
functional test, the closed-circuit breathing apparatus
must not be used. Send the device in to Dräger or have
it serviced by trained personnel.
Failure to follow this warning could lead to death or
serious injury.
NOTICE
The tests are described using the Dräger RZ 7000 test
unit. The specified sequence of the tests is the optimal
sequence with this test unit. An overview is given on
Page 73.
The closed-circuit breathing apparatus can also be
tested with other test units in other sequences
recommended by Dräger. The tests should not be
performed with direct sunlight or in a cold room as the
air pressure in the device will then change quickly and
can result in incorrect test results.
!
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