Sundstrom SR540 User manual

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Operating instruction
SR 540 Face Shield

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General information
The SR 540 Face Shield can be used together with the SR 500
Powered Air-Purifying Respirator system of components to provide
respiratory protection against certain particulates, organic vapours,
acid gases and other inorganic gases.
Refer to the NIOSH Approval Label for a list of approved
components and NIOSH cautions and limitations. Before use, these
user instructions and those for the SR 500 PAPR, cartridges, filters
and compressed air attachment must be thoroughly studied and
understood.
Breathing air is supplied to the respiratory protection inlet covering
(e.g. hood, face shield) from a breathing hose connected to the fan
unit containing the appropriate canisters or filters. The pressure
generated in the face shield prevents particles and other pollutants
from entering.
The respiratory protection inlet coverings can also be used with
compressed air equipment. This combination forms a breathing
apparatus designed for continuous air flow from a compressed air
supply.
The face shield can be used in all situations for which an air-
purifying respirator is recommended. This applies particularly to
work that is hard, warm or of long duration.
When selecting equipment for SR 540 some of the factors that
should be taken into account are as follows:
•Type of pollutant
•Concentrations
•Work intensity
•Protection requirements in addition to respiratory protective advice.
Risk analysis should be carried by a person who has suitable
training and experience in the area.
Instructions for use for SR 540 should be read before use.

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3.1 Unpacking SR 540
3.2 Packing list
Check that the respiratory protection
inlet covering is complete in accordance
with the packing list and has not been
damaged in transit. Locate the User
Instructions and read and understand
prior to attempting to use the product. If
damage is evident or if technical support
is needed contact your supervisor,
respirator program manager, User
Instructions, or for technical support call
Sundström in the U.S.A. and Canada
at 1- 877- SUNDSTROM. Check that
the equipment is complete in
accordance with the packing list and
has not been damaged in transport.
Packing list:
•Face shield
•Breathing hose
•Visor
•User Instructions
•Cleaning tissue
3.3 Assembly
Check that the O-ring of the hose is in
place.

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Check that the flat gasket is ok and in
place at the other end.
Connect the end with the flat gasket to
the face shield.
Turn it clockwise about 1/8 of a turn.
The hose is now connected to the face
shield.

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Connect the hose to the fan unit and turn
it clockwise about 1/ 8 of a turn.
Flow control
Place the head top in the flow meter and
start the fan unit.
Grip the lower part of the bag to seal
around the breathing hose.
Grip the flow meter tube with the other
hand so that the tube points vertically
upwards from the bag.
Read the position of the ball in the tube.
This should hover at a level with or
slightly above the upper marking on the
tube.
If minimum flow is not achieved,
check that:
– The flow meter is held upright.
– The ball moves freely.
– The bag seals well around the hose.

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4.3 Donning the face shield
Raise the visor and put the face shield
on.
If necessary, adjust the head harness in
height by lengthening or shortening the
strap for the top of the head.

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If necessary, adjust the circumference of
the head harness by means of the knob
at the rear of the head harness.
Lower the visor unit by pulling the face
seal down under your chin.
A clicking sound indicates that the visor
unit has been lowered fully.

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Insert a finger between your chin and the
face seal and run the finger along the
contact surface of the face seal all the
way round to check that it fits well
against the face.
Check that the breathing hose runs
along your back and that it is not twisted.

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4.4 Doffing the face shield
Leave the polluted area before removing
the respiratory protection inlet covering
and SR 500 PAPR fan unit.
Take off the respiratory inlet covering.
Switch off the fan.
Release the belt and remove the fan
unit.
After use, the SR 500 components must
be cleaned, inspected and prepared for
reuse (e.g. charge the batteries).
6 Maintenance
6.1 Cleaning/Disinfecting
Sundström cleaning tissues SR 5226
that clean and disinfect are
recommended for daily care.
Clean face shield and visor
If the equipment is more heavily fouled,
use a soft brush or sponge moistened
with a solution of water and dishwashing
detergent or the like.
Rinse the equipment and leave it to dry.

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Clean left and right closing panel.
Clean the valve seat and check that the
valve seat is ok.
Clean the exhalation membrane.

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Clean the valve cover on the inside and
outside.
Clean around the mounting points for the
visor.
Clean around the opening seal.

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Clean the seal.
Clean the face seal.
6.2 Storage
After cleaning, store the equipment in a
dry and clean place at room
temperature.
Avoid exposing it to direct sunlight.
Storage temperature: from -4°F to 104
°F (-20 °C to +40 °C at a relative
humidity 90%.
The flow meter can be turned inside out
and can be used as storage bag for the
head top.

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6.3 Maintenance schedule
The schedule represents the minimum
requirements for maintenance routines in
order to ensure that equipment will
always be in functional condition.
6.5 To change the exhalation membrane
Snap of the valve cover from the valve
seat.
Slip off the membrane.

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Check that the valve seat is ok
Press the new membrane onto the pin.
Carefully check that the membrane is in
contact with the valve seat all way round.
Press the valve cover into place. A
clicking sound indicates that it is in
place.

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6.6 To change the visor
Remove the closing panels (two) by
pushing them forward with your thumb.
Release the visor by moving the lever of
the over-centre lock upwards through
about 180 degrees.
Remove the visor.

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Remove peel-offs from the new visor.
Secure the visor to the fixed mounting.
Then put the visor to the over-centre
mounting.

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Tension the visor by moving the lever
downward as far as it will go.
Check that the visor is firmly in contact
with the visor opening seal all around.
Fit the closing panels by pushing them
into place with your fingers.
A clicking sound indicates that they are
in place.

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6.7 To change the face seal on the SR 540
Release the hooks from the head
harness.
Release the face seal by pulling it´s
frame so that its pins are released from
the visor unit holes.
Remove the face seal.

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Thread the new face seal over the visor
unit flange, with the centre markings in
line with one other.
Thread the new face seal over the visor
unit flange, with the centre markings in
line with one another.
Press the face seal frame down so that
the pins drop into the visor unit holes. A
clicking sound indicates that they are in
place.

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Secure the hooks to the head harness in
the place where sweatband is relieved.
6.8 To change the sweatband
Release the face seal hooks from the
head harness.
Pull the sweatband of.