Dräger PAS ASV User manual

PAS®ASV
Automatic switch-over valve Instructions for Use
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PSS®and PAS®are trademarks of Dräger 3354242 (A3-D-P)
1 For your safety
1.1 General safety statements
●Before using this product, carefully read the Instructions for
Use.
●Strictly follow the Instructions for Use. The user must fully
understand and strictly observe the instructions. Use the
product only for the purposes specified in the Intended Use
section of this document.
●Do not dispose of the Instructions for Use. Ensure that they are
retained and appropriately used by the product user.
●Only fully trained and competent users are permitted to use
this product.
●Comply with all local and national rules and regulations
associated with this product.
●Only trained and competent personnel are permitted to
inspect, repair and service the product. Dräger recommends a
Dräger service contract for all maintenance activities and that
all repairs are carried out by Dräger.
●Properly trained service personnel must inspect and service
this product as detailed in the Maintenance section of this
document.
●Use only genuine Dräger spare parts and accessories, or the
proper functioning of the product may be impaired.
●Do not use a faulty or incomplete product, and do not modify
the product.
●Notify Dräger in the event of any component fault or failure.
●The air supply shall meet the requirements for breathing air
according to EN12021.
1.2 Definitions of alert icons
Alert icons are used in this document to provide and highlight text
that requires a greater awareness by the user. A definition of the
meaning of each icon is as follows:
WARNING
Indicates a potentially hazardous situation which, if not
avoided, could result in death or serious injury.
CAUTION
Indicates a potentially hazardous situation which, if not
avoided, could result in physical injury or damage to the
product or environment. It may also be used to alert against
unsafe practices.
NOTICE
Indicates additional information on how to use the product.
2 Description
2.1 Product overview
The Dräger PAS®ASV is an accessory that allows a Dräger self-
contained breathing apparatus (SCBA) to be used with an external
air source such as a factory airline or other breathing air supply
(e.g. Dräger PAS®AirPack). The PAS®ASV automatically
switches between the external air source and the breathing
apparatus air cylinder, maintaining an uninterrupted air supply to
the wearer during switching.
2.1.1 Operation
During airline use, the PAS®ASV uses the external air source as
the primary supply of breathing air to the wearer, and the breathing
apparatus air cylinder as the secondary (or back-up) supply. If the
external air source pressure remains above a preset pressure the
wearer breathes from the external air source.
If the external air source pressure drops below the preset
switching level, the PAS®ASV switches to supply the wearer from
the breathing apparatus air cylinder. The low-pressure whistle
sounds to inform the wearer that breathing air is supplied from the
air cylinder:
●If the external air source pressure recovers (increases above
the preset switching level) the PAS®ASV switches back to the
external air source and the whistle stops.
●If the external air source falls to atmospheric pressure or is
disconnected the whistle stops. The wearer continues to
breathe from the breathing apparatus air cylinder, and the
breathing apparatus operates as a self-contained set.
2.1.2 Component description
Automatic switch-over valve (Fig 1):
AL (airline) Input from an external air source.
BA (breathing apparatus) Input from the breathing
apparatus air cylinder.
LDV (lung demand valve) Output to the lung demand valve.
Belt manifold (Fig 2):
Item 1 Male quick-coupling: an input coupling for connection to
an external air source. This coupling is not available on
some chemical protection suit (CPS) variants.
Item 2 Low-pressure whistle.
Item 3 Female quick-coupling: an input/output coupling for
connection to the pass-through connection of a
chemical protection suit (CPS) or suit ventilation
device. The coupling is optional and is blanked on some
variants.
The PAS®ASV is a permanent or occasional unit:
Permanent unit (Fig 3) – the belt manifold has a clamp for
permanent connection on to the apparatus.
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Occasional unit (Fig 4) – the belt manifold has a removable clip (S-
type clip shown) that can be removed or installed when required
for specific operations.
The PAS®ASV can be factory fitted or supplied as a kit. When the
PAS®ASV is supplied as a kit the procedure for fitting is described
in the assembly instructions supplied with the kit.
2.2 Intended use
The Dräger PAS®ASV provides an automatic switching function
to allow a Dräger self-contained breathing apparatus (SCBA) to be
used with an external air source to provide extended operating
time in a contaminated or oxygen deficient work area. The
PAS®ASV is used on Dräger PSS®, PAS®, and Plus Series
breathing apparatus.
2.3 Approvals
The European standards, guidelines, and directives according to
which this product is approved are specified in the declaration of
conformity (see declaration of conformity or www.draeger.com/
product-certificates).
2.4 Equipment marking
The labels on the PAS®ASV cover are described in Section 2.1.2.
The equipment label under the cover shows the following
information (examples only):
BRAC-1359 Dräger serial number
3354XXX Dräger part number
3 Use
3.1 Prerequisites
Refer also to the Instructions for Use supplied with the Dräger self-
contained breathing apparatus.
3.1.1 External air source
WARNING
The air supply shall meet the requirements for breathing air
according to EN12021. Do not use oxygen or oxygen
enriched air.
The input pressure from an external air source must not
exceed 10 bar. Higher pressures may cause breathing
difficulties for the breathing apparatus wearer.
The external air source shall provide:
●Supply pressure: 6 bar to 10 bar
●Supply flow rate: at least 550 litres/minute
3.2 Preparation for use
WARNING
The following procedures include system checks and the
acceptable test standards. Contact Dräger if the apparatus
fails to meet any of the standards or any audible air leak
can not be rectified.
NOTICE
The high-pressure whistle referred to below is the
breathing apparatus end-of service time alarm. It can be a
mechanical whistle or an electronic sounder depending on
the breathing apparatus type.
A trained and competent person must perform the following
preparation for use checks after assembly of an automatic switch-
over valve and each time before release of the equipment for
operational use to a wearer.
1. Install the air cylinder.
2. Connect the lung demand valve to the breathing apparatus.
3. Press the reset button on the lung demand valve (positive-
pressure only).
4. Open the cylinder valve. The high-pressure whistle will
momentarily sound.
5. Close the cylinder valve and carry out the functional testing
(leak test and whistle warning test) as detailed in the breathing
apparatus Instructions for Use.
6. Press the reset button on the lung demand valve (positive-
pressure only).
7. Open the cylinder valve of the breathing apparatus.
8. Open the valve of the external air source to pressurize the
system.
9. 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.
10. Check for audible air leaks.
WARNING
Do not direct the air flow on to the face, eyes or skin.
Pressurized air flow can cause serious injuries.
11. 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 (positive-pressure only) to
stop the flow.
Standard: An unobstructed air flow will vent from the outlet of
the lung demand valve. The breathing apparatus pressure
reading should not change, indicating that the air is supplied by
the external air source.
12. Disconnect the external air source from the belt manifold.
13. Check for audible air leaks.
14. Close the cylinder valve.
15. Test the low-pressure whistle and automatic switch-over valve
as follows:
a. Positive-pressure lung demand valve – Cover and seal the
outlet of the lung demand valve with the ball of the hand.
Press the centre of the rubber cover to switch on the valve
and then carefully lift the hand to slowly vent the air.
b. Negative-pressure lung demand valve – Carefully press
the centre of the rubber cover to slowly vent the air.
Standard: The low-pressure whistle will sound briefly at the
preset pressure (3.5 bar to 5.5 bar), and will decay as trapped
air in the airline hose falls to zero. The breathing apparatus
pressure reading should decrease, indicating that the system
has switched to the air cylinder of the breathing apparatus.
16. Immediately stop venting:
a. Positive-pressure lung demand valve – Press the reset
button on the lung demand valve.
b. b.Negative-pressure lung demand valve – Release the
centre of the rubber cover.
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PAS®ASV
Automatic switch-over valve Instructions for Use
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3354242 (A3-D-P)
3354242
© Dräger Safety UK Limited
Edition 16 – October 2018
Subject to alteration
Draeger Safety UK Limited
Ullswater Close Tel [phone]
Blyth, NE24 4RG Fax [phone]
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
Section 3.3.1.
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).
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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.
OOO
Preparation for use,
as defined in the
Instructions for Use
O
Overhaul. Contact
Dräger for the
Repair Exchange
(REX) service
O
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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