Spare Parts; Maintenance Schedule - Sundstrom SR 90 Airline Instrucciones De Uso

Shelf life
The equipment has a shelf life of 5 years from the date of manu-
facture.
Temperature range
Storage temperature: from -20 to +40 °C and a relative humidity
below 90 %.
Service temperature: from -10 to +55 °C and a relative humidity
below 90 %.
Weight
Weight without control valve and filter: 280 g
4. Maintenance
Personnel who are responsible for maintenance of the equipment
must be trained and well acquainted with this type of work.
4.1 Cleaning
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.
Proceed as follows:
• Remove the filter.
• Remove the covers for the exhalation valves and remove the
membranes.
• Remove the inhalation membrane.
• Remove the head harness.
• Clean as described above. Critical areas are the exhalation
membranes and the valve seats, which must have clean and
undamaged contact surfaces.
• Inspect all parts and replace with new parts as necessary.
• Leave the mask to dry, and then assemble it.
• Carry out tightness test as described in 2.4
NOTE! Never use solvent for cleaning.
4.1.1 Disinfection
See section 4.3 for disinfection intervals.
• After cleaning in accordance with 4.1, immerse the parts in a
suitable disinfectant for about 5 minutes.
• Rinse with clean water and allow to dry in air at room
temperature.
• Leave the mask to dry, and then assemble it.
• Carry out leakage testing as described in 2.4.
4.2 Storage
After cleaning, store the equipment in a dry and clean place at
room temperature. Avoid direct sunlight. The flow meter can be
turned inside out and be used as a storing bag.

4.3 Maintenance schedule

The schedule below shows the minimum requirements on main-
tenance routines to assure the user that the equipment will always
be in usable condition.
Before use
Visual inspection
Functional check
Cleaning
Disinfection
Membrane change
Head harness changed
If the equipment is not for your personal use
1)
After use Annually
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1)

4.4 Spare parts

Use only genuine Sundström parts. Don't modify the equip-
ment. The use of 'pirate parts' or any modifications made to the
equipment may reduce the protective effect and compromise the
approvals granted to the equipment.
4.4.1 Control valve
The control valve is a complete, sealed unit. Don't attempt to
repair or modify it.
4.4.2 Inhalation membranes
One membrane is in the centre of the inner mask on a fixed
dowel.
• Prise off the membrane and fit a new membrane. Fig. 7.
4.4.3 Exhalation membranes
The exhalation membranes are mounted on a fixed dowel on
the inside of the valve covers. The covers should be changed
whenever the membranes are changed.
• Snap the valve covers off the valve seats. Fig. 8.
• Prise off the membrane. Fig. 9.
• Press the new membranes onto the dowels. Carefully check
that the membranes are in contact with the valve seats all
round.
• Press the valve covers into place. A clicking sound indicates
that the cover has snapped into place.
• Carry out leakage testing as described in 2.4.
4.4.4 Head harness
The head harness can be ordered as a spare part only as a
complete harness.
• Snap the strap holders of the head harness off the mask
strap mountings. Fig. 10.
• Check that the straps are not twisted and fit the new head
harness.
4.4.5 Breathing hose
• Cut off the hose clip with a pair of pincers and pull the hose
off. Fig. 11.
• Thread the hose clip and retaining clip (Fig. 1:1a) onto the new
hose. Connect to the mask and use a pair of pincers to nip the
hose clip. Fig. 12.
• Apply a load to the hose to check that it is firmly secured to
the mask.
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