PAS
®
ASV
Automatic switch-over valve
Instructions for Use
i
3354242 (A3-D-P)
3354242
© Dräger Safety UK Limited
Edition 16 – October 2018
Subject to alteration
Draeger Safety UK Limited
Ullswater Close
Tel +44 1670 352 891
Blyth, NE24 4RG
Fax +44 1670 356 266
United Kingdom
www.draeger.com
17. Open the cylinder valve of the breathing apparatus.
WARNING
Do not direct the air flow on to the face, eyes or skin.
Pressurized air flow can cause serious injuries.
18. Firmly press the centre of the rubber cover of the lung demand
valve to activate the air flow for 3 to 5 seconds. Press the reset
button on the lung demand valve to stop the flow (positive-
pressure only).
Standard:
An unobstructed air flow will vent from the outlet of
the lung demand valve. The breathing apparatus pressure
reading may decrease, as the air supply is from the air cylinder
of the breathing apparatus.
19. Close the cylinder valve and fully vent the system.
20. Press the reset button on the lung demand valve (positive-
pressure only).
21. Connect the lung demand valve to the face mask.
3.3
During use
The person responsible for the breathing air system should
establish and implement procedures for the use of the equipment
according to the environment in which it is used. In particular, the
procedures should describe the actions required in the event of
failure of the external air source. All wearers must be fully trained
in those procedures, and should proceed in line with established
procedures if failure of the external air source occurs.
WARNING
Position the external air source in a safe and
uncontaminated area. Dräger recommend that a controller
should monitor and maintain the external air source
throughout any operation.
The volume of air in the air cylinder of the self-contained
breathing apparatus must allow the wearer sufficient time
to evacuate to a safe area.
1. Put on the breathing apparatus (see the Instructions for Use of
the self-contained breathing apparatus).
2. Press the reset button on the lung demand valve (positive-
pressure only).
3. Open the cylinder valve. The high-pressure whistle will
momentarily sound.
4. Put on the face mask and carry out the mask fit tests detailed
in the Instructions for Use of the face mask.
5. Briefly press the centre of the rubber cover of the lung demand
valve to activate and check the supplementary supply facility.
6. Open the valve of the external air source to pressurize the
system.
7. Connect the external air source to the male coupling on the belt
manifold. The low-pressure whistle will briefly sound, indicating
that the system has switched to use the external air source.
8. Breathe normally and proceed to the work area.
WARNING
If the low-pressure whistle sounds at any time during an
operation, the PAS
®
ASV has switched to supply the
wearer from the breathing apparatus air cylinder. If this
occurs, proceed in line with established procedures.
If you continue to work while breathing from the air cylinder
of the self-contained breathing apparatus, when connected
to an inoperative external air source, regularly check the
cylinder contents indicator. The volume of air in the air
cylinder must allow sufficient time to evacuate to a safe
area.
9. Withdraw from the work area when the task is complete, when
advised by a controller, or in line with established procedures.
Use the relevant method from the following:
a. Breathing from the external air source (airline mode): see
b. Breathing from the self-contained breathing apparatus air
cylinder (self-contained mode): see Section 3.3.2.
3.3.1
Evacuation – Airline mode
1. Leave the external air source connected to the belt manifold,
and hold and carefully withdraw the external supply airline
hose during evacuation.
2. Proceed to the designated exit area (or another safe area).
3.3.2
Evacuation – Self-contained mode
WARNING
Air use from the air cylinder of the self-contained breathing
apparatus begins from the time that the low-pressure
whistle sounds.
Do not use the supplementary supply facility during
evacuation unless it is essential. Using the facility will
decrease the breathing time from the air cylinder.
1. Disconnect the external air source from the belt manifold and
continue to breathe normally. If it is sounding, the low-pressure
whistle will stop.
2. Proceed to the designated area (or another safe area).
!
!
!
!
3. During evacuation check the cylinder pressure regularly and
note that the high-pressure whistle will sound at the preset
pressure.
3.4
After use
WARNING
Do not remove equipment until in safe area, clear of
hazard.
1. If the external air source is still connected, disconnect it from
the belt manifold and continue to breathe normally.
2. Remove the face mask and breathing apparatus (see the
Instructions for Use supplied with the self-contained breathing
apparatus).
4
Troubleshooting
See also the Instructions for Use supplied with the self-contained
breathing apparatus, the face mask and any other breathing
equipment used.
5
Maintenance
Service and test the breathing apparatus, including out-of-use
apparatus, in accordance with the maintenance table. Record all
service details and testing. Refer also to the Instructions for Use
for the lung demand valve, face mask and other associated
equipment.
Additional inspection and testing may be required in the country of
use to ensure compliance with national regulations.
5.1
Cleaning and disinfecting
CAUTION
Do not exceed 60 °C for drying, and remove components
from the drying facility immediately when dry. Drying time
in a heated dryer must not exceed 30 minutes.
Do not immerse pneumatic or electronic components in
cleaning solutions or water.
If water is trapped and then freezes inside the pneumatic
system of the breathing apparatus, operation will be
impaired. Prevent any liquid from entering, and thoroughly
dry the breathing apparatus after cleaning to prevent this
from occurring.
For information about suitable cleaning and disinfecting
agents and their specifications refer to document 9100081
on www.draeger.com/IFU.
Refer also to the Instructions for Use for the lung demand valve,
face mask and other associated equipment.
●
Use only clean lint-free cloths
1. Clean the PAS
®
ASV manually using a cloth moistened with
cleaning solution to remove excess dirt.
2. Apply disinfecting solution to all internal and external surfaces.
3. Rinse all components thoroughly with clean water to remove all
cleaning and disinfecting agents.
4. Dry all components using a dry cloth, in a heated dryer or in air.
Symptom
Fault
Remedy
Poor sounding
whistle
Dirt in flute
Clean and retest
Low-pressure
whistle not
functioning correctly
PAS
®
ASV failure
Contact Dräger Service
The PAS
®
ASV does
not deliver air from
the air cylinder of the
breathing apparatus
Cylinder valve of the
self-contained
breathing apparatus
is closed
Open the cylinder valve
PAS
®
ASV failure
Contact Dräger Service
The PAS
®
ASV does
not switch from the
breathing apparatus
to the external air
source
External air source
pressure is low
Check and adjust the
external air source
pressure (6 to 10 bar)
PAS
®
ASV failure
Contact Dräger Service
Component/
System
Task
Before
use
After
Use
Every
Year
Every
6
years
PAS
®
ASV
Visual inspection
(see Note 1)
Notes
O Dräger recommendations
1 Clean the equipment if it is dirty. If it the equipment has been
exposed to contaminants, disinfect any components that come
into direct and prolonged contact with the skin.
O
O
O
Preparation for use,
as defined in the
Instructions for Use
O
Overhaul. Contact
Dräger for the
Repair Exchange
(REX) service
O
!
!
5. Contact service personnel or Dräger if disassembly of
pneumatic or electronic components is required.
6
Storage
If the PAS
®
ASV is fitted to a self-contained breathing apparatus,
store as detailed in the Instructions for Use of the breathing
apparatus.
If the PAS
®
ASV is not fitted, store as follows:
●
Place any small parts in a plastic bag and attach to the
PAS
®
ASV.
●
Route the rubber hose so that the bend radius is not too acute
and the hose is not stretched, compressed or twisted.
●
Store the equipment between -15 °C and +25 °C. Ensure that
the environment is dry, free from dust and dirt, and does not
subject the equipment to wear or damage due to abrasion. Do
not store the equipment in direct sunlight.
7
Disposal
When required, dispose of the PAS
®
ASV in line with local or
national regulations.
8
Technical data
Automatic switch-over valve:
Supply pressure (BA)
7.5 bar nominal
Supply pressure (AL)
6.0 to 10.0 bar
Supply flow rate (AL)
at least 550 litres/minute
Switching pressure
3.5 to 5.5 bar
Whistle volume
>90 dBA
Operating temperature range
-30 to +70 °C
