PAS
®
Micro Series
Airline/Short duration respiratory protection equipment with PAS
®
ASV
Instructions for Use
i
PAS
®
is a registered trademark of Dräger, Dow Corning
®
and Molykote
®
are registered trademarks of Dow Corning Corporation
3359994 (A3-D-P) Page 1 of 3
3359994
© Dräger Safety UK Limited
Edition 05 – October 2018 (Edition 01 – July 2011)
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
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 recommend 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 EN 12021.
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
This variant of the Dräger PAS
®
Micro Series provides respiratory
protection for working in a contaminated environment using the air
cylinder or an airline.
The equipment is available as a 10 minute or 15 minute short-
duration version. These are nominal durations available for self-
contained use of the equipment until a whistle sounds to warn the
wearer that there is low cylinder pressure. The nominal duration is
determined by the capacity (volume and pressure rating) of the
selected air cylinder – the actual duration is also dependent on the
rate at which the wearer uses air from the cylinder (the breathing
rate).
The features of the equipment are:
●
The carrying system has a shoulder harness, a waist belt and
a cylinder strap on the rear.
●
The pressure reducer (Fig 1, Item 5) connects directly on to the
air cylinder, and reduces the cylinder pressure to the medium
pressure required at the lung demand valve (Fig 1, Item 1).
The reducer has a whistle that sounds to warn the wearer that
there is low cylinder pressure.
●
The pressure gauge (Fig 1, Item 3) shows the cylinder
pressure during use.
●
The airline connector (Fig 1, Item 6) is a male quick coupling
that is used to connect an independent air supply for airline
use.
●
The medium-pressure hose has a quick coupling (Fig 1,
Item 2) that allows rapid removal and fitting of the lung demand
valve when required.
●
The Dräger PAS
®
ASV (automatic switch-over valve), air
cylinder and lung demand valve are described below.
2.1.1
PAS
®
ASV
The Dräger PAS
®
ASV (Fig 1, Item 4) allows the PAS
®
Micro to be
used with an independent air supply such as a factory airline or
other breathing air supply (e.g. Dräger PAS
®
AirPack). The switch-
over valve automatically switches between the airline supply and
the PAS
®
Micro air cylinder, maintaining an uninterrupted air
supply to the wearer during switching.
Refer to Fig 2
AL (airline)
Input from an independent air supply
BA (breathing apparatus)
Input from the PAS
®
Micro air
cylinder
LDV (lung demand valve)
Output to the lung demand valve
!
!
i
i
During airline use, the PAS
®
Micro is connected to a breathing-
quality independent air supply, and the PAS
®
Micro cylinder valve
is open. The PAS
®
ASV uses the independent air supply as the
primary supply of breathing air to the wearer, and the PAS
®
Micro
air cylinder as the secondary (or back-up) supply.
●
If the independent air supply pressure remains above a preset
switching pressure the wearer breathes from the independent
air supply.
●
If the independent air supply pressure falls below the preset
switching pressure, the PAS
®
ASV automatically switches to
supply the wearer from the air cylinder, and the PAS
®
ASV
whistle (Fig 2, Item 1) sounds. The whistle is supplied from the
air cylinder and therefore sounds continuously while the
wearer is breathing from the air cylinder.
●
If the independent air supply pressure recovers (increases
above the preset switching pressure), the PAS
®
ASV switches
back to the independent air supply and the whistle stops.
See the technical data (Section 8) for the PAS
®
ASV operating
pressures.
2.1.2
Air cylinder
Cylinders are available with a 200 bar or 300 bar working pressure
rating, and in steel or composite materials. Only air cylinders listed
in the Dräger certification are approved for use with the
PAS
®
Micro. Contact Dräger for further information.
2.1.3
Lung demand valve (LDV)
A variety of Dräger lung demand valves are compatible with this
equipment, with the coupling (Fig 3, Item 1) selected to match the
face mask coupling (see table below):
LDV
coupling
Face mask
coupling
Type
Coupling type
A
P
Positive
pressure
Push-in – Dräger specific
During use, the lung demand valve activates automatically as the
wearer breathes, and then regulates the breathing air supply into
the face mask in response to the breathing rate of the wearer.
●
On positive-pressure systems, when the lung demand valve is
activated, the internal valve remains open until closed by the
user. Positive-pressure valves have a reset button (Fig 3,
Item 2) that closes the valve when required. Pressing the reset
button closes the internal valve to switch off the air flow through
the lung demand valve.
●
On negative-pressure systems the internal valve closes
automatically to switch off the air flow through the lung demand
valve.
The lung demand valve can also be activated manually by
pressing the front button (Fig 3, Item 3) to open the internal valve
and activate air flow when required. During
airline use only
, the
front button can be pressed to deliver additional air
(supplementary air) into the mask when required by the wearer.
2.2
Intended use
When this product is used with an approved face mask, air
cylinder, lung demand valve and independent air supply, it
provides the wearer with respiratory protection for working in
contaminated or oxygen-deficient conditions. It is intended for use
in applications where a high level of respiratory protection is
required. The equipment is intended to be used for combination
airline/short duration applications, but it can also be used for short
duration only applications.
The air cylinder, face mask (full face mask conforming to EN 136
Class 2 or Class 3) and other accessories used with this product
must be certified Dräger components, assembled in an approved
configuration; otherwise the operation of the device may be
impaired. Contact Dräger for further information.
2.3
Limitations on use
This product is not approved for use in CBRN applications.
Use in potentially explosive atmospheres
●
The PAS
®
Micro Series are type tested as suitable for use in
potentially explosive atmospheres. Electronic sub-assemblies
are ATEX certified. The combinations are suitable for use in
hazardous areas up to and including zone 0 and zone 20. The
combinations can be used in atmospheres containing gases of
the gas explosion group IIC, with the exception of
combinations using the f 2 range of face masks, which are only
suitable to be used in atmospheres containing gases of the gas
explosion group IIB.
●
Do not charge the cylinder in a potentially explosive
atmosphere.
2.4
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).
3
Use
WARNING
The cylinder and airline air quality shall meet the
requirements for breathing air according to EN 12021. Do
not use oxygen or oxygen-enriched air. The moisture
content of breathing air should be controlled within the
EN 12021 limits to avoid freezing the apparatus.
Carry out a risk assessment of the workplace to ensure that
it is not possible to connect to any airline supply other than
breathable air (e.g. Nitrox).
Fill the PAS
®
Micro air cylinder to the full rated working
pressure prior to use, and do not commence any operation
using a cylinder that is less than 90 per cent full (or greater
when national regulations dictate).
Before using airline equipment, ensure that the
independent air supply meets the air quality requirements,
and complies with the airline pressure, flow and hose
requirements in the technical data (see Section 8), and has
been issued with a permit for use if necessary.
Position the source of the independent air supply in a safe
and uncontaminated area. Dräger recommend that a
controller should monitor and maintain the independent air
supply throughout any operation.
3.1
Preparation for use
3.1.1
Visual inspection
Carry out a visual inspection, checking the full breathing apparatus
including all component parts and accessories. Check that the
equipment is clean and undamaged, paying particular attention to
pneumatic components, hoses and connectors. Typical signs of
AE
PE
Positive
pressure
Screw-in – M45 x 3 to
EN 148-3
N
RA
Negative
pressure
Screw-in – 40 mm round
thread to EN 148-1
LDV
coupling
Face mask
coupling
Type
Coupling type
!
1
2
3
6
4
5
1
3738/3737
BA
AL
LDV
1
2
3718
3
3717
1
2
3
1
2
4
3723
AL
LDV
5
3735
1 2 3
6
3736
7
3625
1
2
3
8
3626
9
3713
