Sundstrom SR 900 User manual

2020-03-18
OI01H-3018 SR 900 1
Operating Instruction
SR 900
Half mask
Revision: 02

General information
Instructions for use for SR 900 should be read before use.
Together with filters from the Sundström filter range in accordance with EN 140:1998. Three sizes S, M and L.
Together with compressed air attachment SR 307, SR 507 and SR 358, SR 359 or SR 360 in accordance with
EN 14594:2005, 3A
Together with powered air unit SR 500 or SR 700 in accordance with EN 12942:1998
Together with Remote filter holder SR 905 according to EN 12083.
When selecting equipment for SR 900 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.
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OI01H-3018 SR 900 2

Unpacking SR 900
Packing list:
• Half mask
• Pre-filter
• Pre-filter holder
• Cleaning tissue
• ID-tag
• User instructions
• Storage bag
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1. Filter
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1.1 Check that you have
selected the right filter and
that the use-by date has not
been passed. (Specified on
the filter and is valid provided
that the filter packaging is
unopened.)
1.2 In environments in which
both gases and particles
occur, such as in spray
painting, gas and particle
filters must be combined.
1.3 Place the particle filter on
top of the cartridge. Grasp
both protective elements.
Squeeze hard until you hear
the particle filter snap onto
the gas filter.
1.4 Place a coin it in the
space between the lower lip
of the particle filter and the
small tab moulded into the
side of the gas filter.
Push firmly and twist the coin
until the filter pops off.

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1.5 Fit the filter in the mask
so that the arrows on the filter
point towards the user’s face.
Check that the edge of the
filter is sealed by the filter
holder all around and that the
filter is in the internal groove
of the filter holder all around
1.6 Fit the pre-filter in the pre-
filter.
1.7 Press it into place on the
filter.
1. Filter

2.Donning
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2.1 Remove any hood,
glasses or ear protection from
head.
Put the mask on.
2.2 Take out any twists or
tangles.Adjust the harness.
2.3 Wiggle the respirator until
it fits comfortably.

3. Adjusting the harness
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3.1 Reach behind your neck
and grab the free end of the
harness strap.
3.2 Pull the free end away
from the neck until buckle
pops open.
3.3 Pull on the free end of the
strap until the respirator seats
comfortably on your face.
Use your thumb and
forefinger to squeeze the
buckle shut.
3.4 Wiggle the respirator until
it seats comfortably.

4.Fit check
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OI01H-3018 SR 900 8
4.1 Put the mask on.
4.2 Place the palm of your
hand lightly over the hole on
the pre-filter holder to make it
tight. Take a deep breath and
hold your breath for about 10s.
If the mask is tight, it will be
pressed against your face.
If any leakage is detected:
• check the exhalation membranes, exhalation valves and the gasket,
• adjust the straps of head harness,
• switch to alternative size of the respirator.
Do not use the equipment if you cannot make the mask a tight fit
during the fitting test.
Note that beard growth, scars, or other physical characteristics may
interfere with a proper fit of the respirator.

5. Change the exhalation membrane
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5.1 Remove the protective
cap.
5.2 Prise off the membranes.
5.3 Press the new membrane
onto the pin. Carefully check
that the membrane is in
contact with the membrane
seat all round.
5.4 Press the new protective
cap into place.

6.Change the inhalation membrane 7. Change the head harness
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6.1 Remove the membrane.
6.2 Fasten the new
membrane on the pin.
7.1 Detach the head harness
from the mask.
7.2 Attach the head harness
to the mask.

8. Change filter holder 9. Change of gasket
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8.1 Detach the filter holder
from the mask by turning it a
¼ of a turn.
8.2 Attach the new filter
holder. Make sure the gasket
is mounted correctly on the
filter holder.
9.1 Detach the filter holder
from the mask by turning it a
¼ of a turn.
9.2 Release the gasket from
the attachment on the filter
holder. Mount the new
gasket.Attach the filter
holder.

10. Cleaning
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10.1 Remove the filter, the
covers for the exhalation
valves, the membranes, the
inhalation membrane and the
head harness. The harness
can be washed but takes
extra time to dry.
10.2 Inspect all parts and
replace with new parts as
necessary. Critical areas are
the exhalation membranes
and the membrane seats
which must have clean and
undamaged contact surfaces.
Sundström cleaning tissues SR 5226 are recommended for daily
care. If the mask is heavily soiled, use a warm (up to +40 °C), mild
soap solution and a soft brush, followed by rinsing with clean water
and drying in air at room temperature. If necessary, spray the mask
with 70 % ethanol or isopropanol solution for desinfection.
NOTE! Never use solvents for cleaning.

Maintenance schedule
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Change parts
Always use genuine Sundström parts. Do not modify the equipment.
The use of non-genuine parts or modification of the equipment may
reduce the protective function and put at risk the approvals received
by the product.
Before
use
After
use Annually
Visual check
•
Fit check
•
Cleaning
•
Change membrane
•
Change harness
•
Change gasket
•
Change filter
See User instructions for filters