Putting The Equipment On; Taking The Equipment Off; Technical Specification - Sundstrom SR 507 Mode D'emploi

Check that the minimum flow of air through the head top is about
175 l/min.
Proceed as follows:
• Connect the adapter to the breathing hose of the head top. Fig 3.
• Connect the breathing hose to the control valve. Fig. 4.
• Connect the compressed air hose to the control valve. Fig. 5.
• Turn the control valve knob anti-clockwise as far as it will go in
order to throttle the airflow rate to a minimum. Fig. 4.
• Place the head top in the bag, and grip the lower part of the bag
so that the bag seals around the breathing hose. Grip the flow
meter with the other hand and hold it so that the tube points
vertically up from the bag. Fig. 2.
• Read the position of the ball in the tube. It should float level with
or just above the marking on the tube.
Hint: Turn the bag inside out and use it for storing the equip-
ment
If the flow rate is below the minimum value, check that
• the flow meter is vertical,
• the ball can move freely,
• the air supply is not restricted by kinks or other restrictions in the
hoses.

2.4 Putting the equipment on

• Unroll the compressed air hose and make sure that it is not
twisted.
• See the user instructions for the head top you are using.
• Put the belt on and adjust the belt length.
• Arrange the control valve in a way that allows easy adjustment
of the flow rate and a strict watch over the breathing hose, i.e.
it must not be placed on the back of the waist.
• Then fit the connection adapter to the breathing hose of the head
top. Fig. 3.
• Connect the breathing hose to the control valve outlet. Fig. 4.
• Connect the hose to the control valve inlet. Fig 5.
• The head top is now being supplied with air and you can put
it on.
• Use the control valve knob to set the air flow rate to suit your
current work intensity. Fig. 4.
In the fully closed position (turn the knob anti-clockwise), the flow
is about 175 l/min, and in the fully open position (turn the knob
clockwise), it is about 260 l/min.

2.5 Taking the equipment off

Leave the polluted work area before taking the equipment off.
• Remove the head top.
Releasing the compressed air hose and the breathing hose
Both couplings are of safety type and are released in two stages.
Fig. 6.
• Push the coupling towards the nipple.
• Pull the locking ring back.
After every period of use, check that no defects have occurred,
and clean the equipment. See 4.1.
2.6 Warnings/limitations
Warnings
As a general rule, the user must always be able to retreat to safety
without risk if the air supply should cease or if he/she must take
off the equipment for some other reason.
The equipment must not be used
• If the air flow test or fit test does not produce satisfactory results.
See 2.3.
• If the ambient air does not have a normal oxygen content.
• If the pollutants are unknown.
• In environments that are immediately dangerous to life and health
(IDLH).
• With oxygen or oxygen-enriched air.
• If the user finds it difficult to breathe.
16
• If you can smell or taste the pollutants.
• If you experience dizziness, nausea or other types of discomfort.
• If the warning whistle sounds. This indicates that the air supply
is lower than recommended.
Limitations
• Anyone who wears a beard or sideboards cannot expect the
head top to be tight.
• A person working in an explosive or flammable environment
must follow any local regulations that may be in force for such
conditions.
• The air supply system should be equipped with an appropriately
rated and adjusted pressure relief safety valve.
• A risk assessment has to be done to avoid possible perilous
connections possible at the workplace, e.g. Nitrox.
• At very high work intensity, a partial vacuum may occur in
the equipment during the inhalation phase, which may cause
ambient air to be drawn in.
• Use of the equipment together with spiral hose SR 360 is
restricted to situations in which there is little risk of damage to
the hose and if the freedom of movement of the user can be
restricted.
• The equipment is approved only together with Sundström
compressed air hoses that must be used if CE approval and
product responsibility are to apply.
• The SR 507 is not approved for use with a mobile compressed
air system.

3. Technical specification

Air flow rate
From 175 l/min to 260 l/min measured in the head-top.
Manufacturer's minimum design flow: 175 l/min.
Compressed air supply tubes AS/NZS
Approved tubes must be used if Australian Standards approval is
to be valid. Tubes from 5–30 m or coupled to 90 m may be used.
Compressed air tubes EC
The following tubes have been granted type approval together with
Sundström compressed air equipment. The tubes are complete
with safety couplings/nipples:
• SR 358. 9.5/15 mm plastic tube made of PVC-reinforced
polyester. Resistent to oil and chemicals. 5–30 m.
• SR 359. 9.5/18 mm rubber tube made of EPDM/polyester.
Antistatic and heat resistant. 5–30 m.
• SR 360. 8/12 mm spiral tube made of polyurethane.
2, 4, 6 and 8 m.
The hoses should be used separately. They shall not be combined.
Materials
Plastic parts are marked with the material code and recycling
symbol.
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 %.