Maintenance
Dräger PSS BG 4 plus 21
4.3.1 Cleaning and disinfecting procedure for the USA
only
1.
2.
Wipe Belts, Harnesses, Switch Box and Sentinel with a
damp cloth.
Remove the facepiece from the connector piece and
make sure the facepiece gets disinfected.
3. Clean all parts which get in contact with the exhaled air with
lukewarm water and an approved disinfectant. Contact
Draeger Customer Service.
4. Pre-wash parts
if necessary under running water.
5. Prepare a disinfectant bath containing water and
an approved disinfectant (max. temperature: 86 °F/
30 °C, concentration: 2 fl.oz. per 1 gallon/60 ml per 3.79 l).
6. Place the parts, to be disinfected, into the disinfectant
bath . Submerge parts to insure cleaning. (duration: 5 to
10 minutes)
7. Thoroughly rinse all parts with clean water.
8. Dry the parts. (max. drying temperature: 140 °F/60 °C)
Dräger offers both a drying cabinet and a hose drying
unit for drying. Adapter set R34098 contains all the
adapters required for drying using a hose drying unit.
Contact Draeger Customer Service for details.
.
9. Grease the O-
rings as necessary.
4.3.2 Cleaning and disinfecting procedure for other
countries
1. Wipe both Switch Box and Sentinel with a damp cloth.
2. Loosen the lock screw
which is located in the facepiece
connector and drain the water from the facepiece
connector. Leave the facepiece connector open when
cleaning and disinfecting the closed-circuit breathing
apparatus.
3. Prepare a cleaning solution containing water and
an approved disinfectant cleaner (max. temperature 86 °
F/30 °C, concentration: 1 fl. oz. per 2 gallons).
4. Immerse the parts which get in contact with the exhaled air
in the cleaning solution (duration: 10 minutes). Make sure
that all parts are wetted.
5. Thoroughly rinse all parts under running water.
6. Dry the closed-circuit breathing apparatus as follows (max.
drying temperature: 140 °F/60 °C):
Dräger recommends to use both a drying cabinet and a
hose drying unit for drying. Adapter set R34098 contains all
the adapters required for drying using a hose drying unit.
Breathing bag and breathing hoses should be dried using
the hose drying unit.
.
7. Moisten or grease the O-ring of the lock screw and close
the facepiece connector with the lock screw.
4.4 Assembly of the closed-circuit breathing
apparatus
Assemble the closed-circuit breathing apparatus as follows:
1. Fit waist belt and shoulder straps (see chapter 4.4.1 on
page 21).
2. Fit the drain valve (see chapter 4.4.2 on page 21).
3. Fit the minimum valve (see chapter 4.4.3 on page 22).
4. Fit the breathing bag (see chapter 4.4.4 on page 22).
5. Fit the breathing air cooler (see chapter 4.4.5 on page 22).
6. Connect the hose of the constant metering valve
(see chapter 4.4.6 on page 22).
7. Fit the switch box (see chapter 4.4.7 on page 22).
8. Fit the CO
2
absorber (see chapter 4.4.8 on page 22).
9. Fit the connecting piece (see chapter 4.4.9 on page 23).
10. Fit the breathing hoses (see chapter 4.4.10 on page 24).
11. Fit the compressed oxygen cylinder (see chapter 3.3.2 on
page 11).
12. Close the closed-circuit breathing apparatus
(see chapter 3.3.1 on page 10).
4.4.1 Fitting waist belt and shoulder straps
1. Press the locking clips into the carrying frame through
the slots.
2. Fasten the Sentinel cables in the loops on the
shoulder strap.
3. Press down the waist belt at the fixing point and turn it by
90° at the same time.
4. Thread the waist belt through the shoulder straps.
4.4.2 Fitting the drain valve
1. Attach the drain valve to the sleeve on the breathing bag.
2. If required, fit the water absorber onto the drain valve:
To do this, pull the sleeve on the water absorber over the
drain valve housing.
N
OTICE
I
t is important to dry waist belt and shoulder straps
before storage to prevent fungus and mold growth.
Clean as necessary.
N
OTICE
It is important to dry waist belt and shoulder straps
before storage to prev ent fungus and m old growth.
Clean as necessary
i
i
Draeger Training 11/16 rev 1
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