Dräger PSS BG 4 plus User Manual

18 Dräger PSS BG 4 plus
Maintenance
3. Check that the control line is dry inside.
If necessary, use compressed air acc. to CGA G7.1
Grade D or better to carefully blow-dry.
4. Press the safety catch handles (3) together and remove the
angled connector from the CO
2
absorber.
5. Release the tensioning bar (4).
6. Grip the CO
2
absorber on the grommet and tilt upwards.
7. Take the CO
2
absorber out of the lower retaining bracket
and remove from the carrying frame.
8. Dispose of the disposable cartridge or re-fill the refillable
cartridge.
4.2.5 Removing and testing the pressure relief valve
1. Move the pressure relief valve to the right (1) until the
clamps (2) can be pressed together.
2. Take the pressure relief valve off the spring holder.
3. Examine the O-ring of the angled connector; it must be
clean and undamaged, otherwise it must be replaced.
4. Take the valve cover (4) off the pressure relief valve.
5. Unhook the stepped valve disk (3) from the valve cover.
6. Take valve disk (5) and O-ring (6) out and check. They must
be clean and undamaged.
Replace faulty parts. Apply Molykote 111 thinly to the
O-ring.
7. Re-fit the pressure relief valve.
4.2.6 Removing the breathing air cooler
1. Unhook the breathing bag from the breathing air cooler.
To do this, stretch the tab on the sleeve (A-1) and remove.
2. Unfasten the medium-pressure hose of the constant
metering valve (B-3) from the breathing air cooler
(see chapter 4.2.11 on page 20).
3. Unfasten the tensioning bar (B-2).
4. Remove the breathing air cooler.
5. Remove the cover from the breathing air cooler.
To do this, lift the locking device (B-5) and release the catch
(B-4) in an anti-clockwise direction.
6. Drain the water of the ice pack.
4.2.7 Removing the lever
1. Lift the safety knob (1) and pull the lever to the right.
2. Lift the safety knob (2) and remove the lever.
NOTICE
Refillable cartridges may only be filled shortly before
they are fitted into the closed-circuit breathing
apparatus. Take the corresponding instructions for use
into account.
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Page 18
Draeger Training 11/16 rev 1

Dräger PSS BG 4 plus Specifications

General

Brand	Dräger
Model	PSS BG 4 plus
Category	Diving Instrument
Language	English