Inspection Before Use; Maintenance Schedule - Sundstrom SR 900 Mode D'emploi

• Fit the pre-filter in the pre-filter holder and
press it into place on the filter. Fig. 22, 23.
When using both gas filter and particle filter,
the particle filter shall always be snapped onto
the gas filter and the gas filter shall always be
inserted in the mask. Press the filters together
with your fingers placed around the outer edges
of the filters until you hear a click. Fig. 24.
Separating filter
• Place a coin 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 filters
separate. Fig. 25.

3.2 Inspection before use

• Check that the mask is complete, correctly
assembled and thoroughly cleaned.
• Check the mask body, membranes, and
membrane seats. Replace if worn, broken,
or in other way defect. Fig. 26.
• Check that you have selected the right filter
and it has been installed properly. Fig. 27.
3.3 Donning
• Remove any hood, glasses or ear protection
from head.
• Put the mask on. Fig. 28, 29, 30.
• Take out any twists or tangles.
• Adjust the harness. Fig. 31.
• Wiggle the respirator until it fits comfortably.
Fit check
• Put the mask on.
• Place the palm of your hand lightly over
the hole on the pre-filter holder to make it
tight. Fig. 32.
• Take a deep breat and hold your breath for
about 10 s.
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.
3.4 Doffing
Do not take off the mask until clear of the
hazardous area.
• Take the mask off. Fig. 33.
4. Maintenance
4.1 Cleaning
• Remove the filter, the covers for the exhala-
tion valves, the membranes, the inhalation
membrane and the head harness. The har-
ness can be washed, but takes extra time
to dry. Fig. 34.
• Clean the mask and all parts with Sundström
cleaning tissues SR 5226.
• 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. Fig. 35.
• If necessary, spray the mask with 70 % ethanol
or isopropanol solution for disinfection.
• Inspect all parts and replace with new parts
as necessary. Critical areas are the exhala-
tion membranes and the membrane seats
which must have clean and undamaged
contact surfaces.
• Leave the mask to dry, and then assemble it.
NOTE! Never use solvents for cleaning.
4.2 Storage
The best way to store the mask is in the pro-
vided storage bag, or Sundström storage box
SR 230 or storage bag SR 339. Keep it away
from direct sunlight or other sources of heat.
NOTE! A gas filter should be stored in a tightly
sealed plastic bag.

4.3 Maintenance schedule

Recommended minimum requirements on
maintenance routines so you will be certain
the the equipment will always be in usable
condition.
Before use
•
Visual check
•
Fit check
Cleaning
Change membrane
Change harness
Change gasket
See User instructions for filters
Change filter
After use Every
year
•
•
•
•
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