Sundstrom SR 500 Consignes D'utilisation page 38

3. Combined filters
• Check that the gaskets in the filter mounting of the fan
unit are in place and are in good condition. Fig. 18.
• Snap the particle filter onto the gas filter. The arrows
on the particle filter must point towards the gas filter.
Do not press onto the centre of the filter - it might da-
mage the filter paper. Fig. 19.
• Screw the combined filter into the filter mounting until
it is in contact with the gasket. Then turn it about 1/8
turn further to ensure a good seal. Fig. 24.
• Fit a pre-filter into the pre-filter holder. Fig. 21.
• Press the pre-filter holder onto the combined filter.
Fig. 25.
Filter SR 599 is a combined gas filter and particle filter
and is screwed directly into the filter mounting of the fan.
Proceed as described above.
e) Plug kit
The Plug kit is used for cleaning or decontamination of
the fan unit and prevents dirt and water from entering the
fan housing.
Disconnect the breathing hose and the filters and install
the plugs. Fig. 42.
3.3 Operation/performance
Start/Switch off
• Start the fan unit by pressing the control button
once. Fig. 26.
• The symbols on the display will light up, the sound
signal will sound and the vibrator will vibrate. Fig. 27.
• The battery symbol on the display indicates the
battery capacity.
o Lights green: > 70 %
o Flashing green: 50-70 %
o Lights yellow: 20-50 %
o Flashing red: < 20 %
• The fan unit starts in normal operating status.
Switch between normal and boosted operating
status with the control button.
• To switch off the fan unit, keep the control button
depressed for about two seconds.
Display symbols
Fig. 28
a) Battery: Indicate the battery capacity at start and
when the battery capacity is low.
b) Small fan: Lights up with a green light during normal
operation.
c) Bigger fan: Lights up with a green light during
boosted operation.
d) Warning triangle: Lights up with a red light if the air
flow are obstructed or if the filters are clogged.
Warning system/Alarm signals
• In the event of air flow obstructions
o A pulsating sound signal will be heard.
o The built-in vibrator will be activated.
o The red warning triangle of the display will flash.
Action: Immediately interrupt the work, leave the area,
and inspect the equipment.
• If the particle filters are clogged
o A continuous sound signal will be heard for five
seconds.
o The built-in vibrator will be activated for five
seconds.
o The red warning triangle in the display will flash.
38
The warning triangle will flash continuously, whereas the
sound signal and the vibrator will be repeated at intervals
of 80 seconds.
Action: Immediately interrupt the work, leave the area
and change the filter.
Note! No signal is activated when the gas filters are sa-
turated. For particulars of changing the gas filters, see
under 3.1.2 Filters and the user instructions supplied
with the filters.
• If the battery capacity is lower than 5 %
o A sound signal will be repeated twice at intervals
of two seconds.
o The built-in vibrator will be activated twice at in-
tervals of two seconds.
o The battery symbol of the display will flash red.
The battery symbol will flash continuously, whereas the
other signals are repeated at intervals of 30 seconds un-
til about one minute remains before the battery would be
fully discharged. The sound signal then changes to an
intermittent signal.
Action: Immediately interrupt the work, leave the area
and change/charge the battery.
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 moun-
ted, 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 up-
per attachment of the breathing hose. Fig. 29.
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. 30.
• 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. 31.
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.
• Provoke an air flow stoppage by gripping the top part
of the bag or by shutting off the flow meter outlet.
Fig. 32.
• The fan unit should then initiate alarms by sound, light
signals and vibrations.
• If the air is again allowed to flow, the alarm signals will
automatically cease after 10-15 seconds.
3.5 Donning
After the filters have been fitted, a performance check
has been carried out and the head top has been con-
nected, 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. 33.