PSS® Series Pneumatic Accessories
Second medium-pressure connector - Waist or shoulder mounted Instructions for Use
PSS® and PAS® are registered trademarks of Dräger 3355853 (A3-D-P) Page 1 of 3
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.
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.
NOTICE
Indicates additional information on how to use the product.
2 Description
2.1 Product overview
The PSS® series second medium-pressure connectors are a range of
accessories that integrate into the pneumatic system of Dräger PSS® series
and PAS®Lite series breathing apparatus. The accessories connect into the
medium-pressure system at a port on the pressure reducer, and provide the
wearer with one or two connectors as follows:
● An outlet connector (female quick-connect coupling) is used for the supply
of air to a second person for the purpose of rescue.
● An inlet connector (male quick-connect coupling) is used for the supply of
air from an alternative medium-pressure air source for decontamination.
● A combined connector comprises both an inlet connector and an outlet
connector.
The connectors (see Figure 12 to Figure 27) can be fitted at the waist or
shoulder of the wearer, and can be fixed securely or loosely to the apparatus.
Loose connectors use hose clips and straps. Secured connectors also use a
retaining block secured by screws.
2.2 Intended use
The PSS® series second medium-pressure connectors are intended for use
with Dräger PSS® series and PAS®Lite series breathing apparatus, to provide
the wearer with rescue and/or decontamination capabilities.
Lung demand valves, rescue hoods and other accessories used with these
products must be certified Dräger components, assembled in an approved
configuration. Contact Dräger for further information.
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 Explanation of marking and symbols
Examples of marking on component parts of the second medium-pressure
connectors are:
08/09 – Month and year of manufacture
3356812 or R21034 – Dräger part number
SF – Standard force coupling
LF – Low force coupling
3 Use
WARNING
The detailed procedures described in these instructions for use shall be
followed in order to avoid exposure to higher risks (e.g. air loss).
Before using the second medium-pressure connector it must be properly
assembled and tested on a Dräger PSS® series or PAS®Lite series breathing
apparatus. Assembly instructions (see Section 7) are included in these
instructions for use for trained service personnel only.
3.1 Preparation for use
1. Prepare the breathing apparatus for use, including all pre-operational and
functional testing, and don the breathing apparatus (see the instructions for
use supplied with the breathing apparatus).
2. When required, carry out the decontamination procedure (see Section 3.2)
or rescue procedure (see Section 3.3).
3.2 Decontamination procedure
WARNING
Air quality for compressed air systems must conform to EN12021; do
not use oxygen or oxygen enriched air.
The decontamination air supply pressure to the second medium-
pressure connector must not exceed 10 bar. Do not attempt to connect
high-pressure air.
Using an air supply that does not comply with the air quality, pressure
and flow requirements could result in death or serious injury for the
user.
NOTICE
It is recommended that a second person monitors and maintains the
decontamination air supply throughout the decontamination procedure.
Decontamination air supply pressure and flow
Operating requirement: 6 bar to 10 bar at an air flow rate of at least 550 litres/
minute.
1. Ensure that the decontamination air supply complies with the air quality,
pressure and flow requirements.
2. Close any relief valves fitted, and then fully open the valve of the
decontamination air supply to pressurize the system.
3. Disconnect the protection cap from the inlet connector (male coupling) of
the second medium-pressure connector and connect the hose from the
decontamination air supply.
WARNING
Fully close the cylinder valve of the breathing apparatus to avoid air
loss from the cylinder during decontamination.
If there is any disruption to the decontamination air supply, reopen the
breathing apparatus cylinder valve and immediately disconnect the
decontamination air supply from the breathing apparatus.
4. Breathe normally and fully close the cylinder valve of the breathing
apparatus (see the instructions for use supplied with the breathing
apparatus).
NOTICE
If the pressure of the decontamination air supply is higher than the
medium pressure of the breathing apparatus, air may be trapped on the
high-pressure side of the reducer. The gauge of the apparatus will
continue to show a reading and the whistle will activate as normal as
air escapes. Take several short deep breaths or briefly press the centre
of rubber cover of the lung demand valve to release the trapped air.
5. When the decontamination procedure is complete, remove the breathing
apparatus using one of the following methods:
Method 1 – When the wearer is in a safe area (surrounding air is safe to breathe
and all contamination sources have been removed).
1. Lift and pull forward on each of the bottom buckles of the face mask straps.
2. Positive-pressure systems only – as the seal between the face and the
mask is broken, press the reset button of the lung demand valve.
3. Remove the face mask.
4. Disconnect the decontamination air supply from the second medium-
pressure connector and reconnect the protection cap.
5. Press the rubber cover at the front of the lung demand valve to vent the
system fully. Press the reset button of a positive-pressure lung demand
valve.
6. Remove the breathing apparatus (see the instructions for use supplied with
the breathing apparatus).
Method 2 – When the wearer is in an unsafe area (surrounding air is not safe to
breathe or there are, or may be, contamination sources in the area).
WARNING
The duration of the breathing apparatus air supply is dependent on the
volume of air in the cylinder. The wearer commences breathing from
the air cylinder when the cylinder valve is opened and the
decontamination air supply is disconnected.
1. Slowly and fully open the cylinder valve of the self contained breathing
apparatus.
2. Disconnect the decontamination air supply from the second medium-
pressure connector and reconnect the protection cap.
3. Breathe normally and proceed to a safe area.
4. Once in a safe area, remove the breathing apparatus (see the instructions
for use supplied with the breathing apparatus).
3.3 Rescue procedure
WARNING
Using the second medium-pressure connector for a rescue will reduce
the duration of the air supply from the cylinder. Fully assess the risks,
considering both the wearer and the person in distress, before carrying
out a rescue.
For a rescue operation, the second medium-pressure connector is connected to
a lung demand valve and face mask combination, or a rescue hood. The
recommended rescue breathing equipment is:
● PSS® Rescue Hood, or
● Dräger rescue lung demand valve (N-type with 1.75 m hose) and Dräger
face mask (RA-type – normal pressure).
The second medium-pressure connector can also be used for unplanned
assistance to a second wearer of compatible breathing apparatus. Products that
are compatible with the second medium-pressure connector are Dräger Plus
and PSS® series lung demand valves (A, AE, N and ESA), when they are
connected to a face mask.
1. At the incident rescue point, disconnect the protection cap from the outlet
connector (female coupling) of the second medium-pressure connector.
Connect a lung demand valve and face mask combination, or a rescue
hood, to the coupling.
2. Proceed immediately to a safe area.
3. Once in a safe area, remove the breathing apparatus (see the instructions
for use supplied with the breathing apparatus).
4. Disconnect the male coupling from the outlet connector of the second
medium-pressure connector and refit the protection cap.
3.4 After use
Carry out the after use tasks detailed in the associated breathing apparatus
instructions for use.
4 Troubleshooting
There are no user troubleshooting tasks for the PSS® series second medium-
pressure connectors. Refer to the troubleshooting information in the associated
breathing apparatus instructions for use, or contact Dräger or service personnel
for further information.
5 Maintenance
Carry out routine maintenance, including cleaning and disinfecting, after each use
as defined in the associated breathing apparatus instructions for use.
6 Storage
Store the equipment in a cool dry environment, free from dust and dirt. Do not
expose to direct sunlight.
7 Assembly instructions
WARNING
Fitting the second medium-pressure connector to a breathing
apparatus may only be carried out by suitably trained personnel
(attendance at an appropriate Dräger maintenance course is required).
Fitting by untrained personnel could make the breathing apparatus
unsafe for use.
Tools Required
T10 driver
5 mm hexagon key
Torque wrench (1–4 Nm)
1. Remove the air cylinder from the breathing apparatus (see the instructions for
use supplied with the breathing apparatus).
2. PAS®Lite and PSS®3000/4000 only: remove the pressure reducer from
the backplate:
See Figure 1.
a. Remove the rubber boot. Unhook one of the legs from the slot in the
frame half. Repeat for the other leg and remove the boot.
b. Position the apparatus to access the front of the set.
See Figure 2.
c. Using the 5 mm hexagon key, remove the screw. Remove the locknut
from the left-hand frame half.
See Figure 3.
d. With the left hand, hold the base of the left-hand frame half and the
pressure reducer hand wheel. With the right hand, hold the base of the
right-hand frame half and pull the frame apart.
e. When the base of the right-hand frame half is just clear of the pressure
reducer, lift the left-hand frame half and remove the pressure reducer.
f. Place the left-hand and right-hand frame halves together.
See Figure 4.
3. Remove the screw (1) and then remove the retention staple (2) from the
reducer body.
4. Remove the medium-pressure hose (3) from the port of the reducer.
NOTICE
Component parts of the relief valve (spring, O-ring retainer and O-ring)
remain attached to the nozzle of the medium-pressure hose. Do not
remove the parts.
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