Performance Check; Putting The Equipment On - Sundstrom SR 700 Mode D'emploi

• If particle filter SR 510 are used, snap it on the filter
adapter without pressing onto the centre of the
filter.
• Screw the filter into the filter mounting so far that
the adapter will be in contact with the gasket. Then
turn it about 1/8 of a turn further in order to ensure
a good seal. Fig. 19.
e) Pre-filters SR 221
• Assemble the pre-filters. Fig. 20, 21.
f) 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. 35.
3.6 Operation/performance
Display
Fig. 22.
a) Battery symbol that lights up with a yellow light when
the battery capacity is low.
b) Triangle that lights up with a red light if the air flow
should cease or if the filters are clogged.
c) Small fan symbol that lights up with a green light
during normal operation.
d) Bigger fan symbol that lights up with a green light
during boosted operation
Warning system/alarm signals
• In the event of air flow obstructions
• A pulsating sound signal will be heard.
• 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
• A continuous sound signal will be heard for five
seconds.
• The red warning triangle in the display will
flash.
The warning triangle will flash continuously,
whereas the sound signal will be repeated at
intervals of 80 seconds.
Action: Immediately interrupt the work, leave the
area and change the filter.
• If the battery capacity is lower than 5 %
• A sound signal will be repeated twice at
intervals of two seconds.
• The yellow battery symbol of the display will
flash.
The battery symbol will flash continuously, whereas
the other signals are repeated at intervals of 30
seconds until 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.
Start/Switch off
• Start the fan by pressing the control button once.
Fig. 23.
The symbols on the display will light up and the
sound signal will sound. The fan starts in normal
operating status. Fig. 24.
• 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.

3.7 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.
• SR 550 PU and SR 951 PU breathing hose:
Place the head-top in the flow meter and grip the
lower part of the bag to seal around the breathing
hose.
• SR 551 Rubber and SR 952 PU breathing hose:
Place the head-top in the flow meter and grip the
lower part of the bag to seal around the upper
attachment of the breathing hose. (Attachment is
shown in Fig. 15). Note. You must not grip
around the rubber hose itself as this would
either obstruct the air flow or cause failure to
achieve a proper seal. Fig. 25.
• Grip the flow meter tube with the other hand so that
the tube points vertically upwards from the bag.
Fig. 26.
• 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. 27.
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. 28.
• 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.

3.8 Putting the equipment on

• 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. 29.
• Start the fan.
• Put the head top on.
• Make sure that the breathing hose runs along your
back and is not twisted. Fig. 29.
Note that when a full face mask is used, the hose
should run along your waist and up along the chest.
Fig. 30.
When a half mask is used, the hose should run along
your back and over your shoulders. Hose SR 951, see
fig. 31. Hose SR 952, see fig. 32.
25