Maintenance - Sundstrom SR 500 EX Gebrauchsanleitung

3.4 Performance check
The performance check should be checked on every
occasion before the fan unit is used.
Check of the minimum flow - MMDF
• Check that the fan unit is complete, correctly
mounted, thoroughly cleaned and undamaged.
• Start the fan unit.
• Place the head top in the flow-meter.
• Grip the lower part of the bag to seal around the
upper attachment of the breathing hose. Fig. 19.
Note! You must not grip around the breathing
hose itself as this would either obstruct the air
flow or cause failure to achieve a proper seal.
• Grip the flow meter tube with the other hand so that
the tube points vertically upwards from the bag.
Fig. 19.
• 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, (175 l/min). Fig. 20.
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.
Checking the alarms
The equipment is designed to provide a warning if the
air flow is obstructed. This alarm function should be
checked in conjunction with the flow check before the
equipment is used. Proceed as follows:
• Provoke an air flow stoppage by gripping the top
part of the bag or by shutting off the flow meter
outlet. Fig. 21.
• The fan unit should then initiate alarms by sound
and light signals.
• If the air is again allowed to flow, the alarm signals
will automatically cease after 10-15 seconds.
• Switch off the fan unit and remove the flow meter.
3.5 Donning
After the filters have been fitted, a performance check
has been carried out and the head top has been
connected, the equipment can be put on. Before
putting it on, read the user instructions for the head
top.
• Take the fan unit on and adjust the belt so that the
fan unit is firmly and comfortably secured at the
back of your waist. Fig. 22.
• Start the fan by pressing the control button. See
also 2.6 above.
• Put the head top on.
• Make sure that the breathing hose runs along your
back and is not twisted. Fig. 22. Note that when a
full face mask is used, the hose should run along
your waist and up along the chest. Fig. 23.
3.6 Doffing
Leave the polluted area before taking the equipment off.
• Take off the head top.
• Switch off the fan.
• Release the belt and remove the fan unit.
After use, the equipment must be cleaned and
inspected. See 4. Maintenance.

4. Maintenance

The person who is responsible for cleaning and
maintenance of the equipment must have suitable
training and be well acquainted with work of this type.
4.1 Cleaning
Sundström cleaning tissue SR 5226 are recommend-
ed for daily care. At more thorough cleaning or
decontamination - proceed as follows:
• Assemble the plug kit. See 3.2 e.
• 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.
• If necessary, spray the fan unit with 70 % ethanol or
isopropanol solution for disinfection.
NOTE! Never use a solvent for cleaning.
4.2 Storage
After cleaning, store the equipment in a dry and clean
place at room temperature. Preferably store the fan
unit with the plugs fitted. Avoid exposing it to direct
sunlight. The flow meter can be turned inside out and
can be used as a storage bag for the head top.
4.3 Maintenance schedule
Recommended minimum requirements on mainte-
nance routines so you will be certain that the
equipment will always be in usable condition.
Before use
Inspection/lubrication
•
of battery gasket
•
Visual inspection
•
Performance check
Cleaning
Change of fan gaskets
4.4 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.
4.4.1 To change the particle filters/
gas filters/combined filters
Change the particle filters at the latest when they are
clogged. The fan senses when this has occurred and
provides a warning as described in 3.3 under the
heading Operation/performance. The gas filters
should preferably be changed in accordance with a
predetermined schedule. If no measurements are
made on site, the gas filters should be changed once
a week or more frequently if the pollutants can be
smelt or tasted in the head top.
Bear in mind that both filters/combined filters must be
changed at the same time and must be of the same
type and class. Proceed as follows:
• Switch off the fan unit.
• Unscrew the filter/combined filter.
• Release the filter holder. Fig. 24.
• Change the pre-filter in its holder. Clean as
necessary.
After use Annually
•
•
•
•
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