Sundstrom SR 520 Bedienungsanleitung

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Operating instructions

SR 520 Hood

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General information

The SR 520 Hood can be used together with the SR 500 Powered

Air-Purifying Respirator system of components to provide respiratory

protection against certain particulates, organic vapours, acid gases

and other inorganic gases.

Refer to the NIOSH Approval Label for a list of approved

components and NIOSH cautions and limitations. Before use, these

user instructions and those for the SR 500 PAPR, cartridges, filters

and compressed air attachment must be thoroughly studied and

understood.

Breathing air is supplied to the respiratory protection inlet covering

(e.g. hood, face shield) from a breathing hose connected to the fan

unit containing the appropriate canisters or filters. The pressure

generated in the face shield prevents particles and other pollutants

from entering.

The respiratory protection inlet coverings can also be used with

compressed air equipment. This combination forms a breathing

apparatus designed for continuous air flow from a compressed air

supply.

The face shield can be used in all situations for which an air-

purifying respirator is recommended. This applies particularly to

work that is hard, warm or of long duration.

When selecting equipment for SR 520 some of the factors that

should be taken into account are as follows:

•Type of pollutant

•Concentrations

•Work intensity

•Protection requirements in addition to respiratory protective advice.

Risk analysis should be carried by a person who has suitable

training and experience in the area.

Instructions for use for SR 520 should be read before use.

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3.1 Unpacking SR 520

3.2 Packing list

Check that the equipment is complete in

accordance with the packing list and

has not been damaged in transit.

Packing list:

•Hood with breathing hose.

•User instructions

•Cleaning tissue

•Protective film

3.3 Assembly

Remove the protective film on the visor.

Check that the O-ring of the hose is in

place.

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Connect the hose to the fan unit and

turn it clockwise about 1/ 8 of a turn.

Flow control

Place the head top in the flow meter and

start the fan unit.

Grip the lower part of the bag to seal

around the breathing hose.

Grip the flow meter tube with the other

hand so that the tube points vertically

upwards from the bag.

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.

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.

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4.3 Donning the hood

Connect the hose, put the fan unit on

and start it. See the user instructions for

the SR 500.

Adjust the head harness by adjusting

the length of the Velcro strap. This is

important for ensuring a good fit.

Grip the hose mounting with one hand

and, with the other, hold the strap in the

lower part of the hood.

Put your chin into the hood.

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Keep hold of the strap and pull the hood

over your head with the hand holding

the hose mounting.

Adjust the hood so that it seals all the

way round your face and so that it fits

firmly and comfortably.

To ensure a perfect fit, it may be

necessary to take off the hood and

adjust the head harness.

Make sure that the breathing hose runs

along your back and is not twisted.

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4.4 Doffing the hood

Leave the polluted area before

removing the respiratory protection inlet

covering and SR 500 PAPR fan unit.

Take off the respiratory inlet covering.

Switch off the fan.

Release the belt and remove the fan

unit.

After use, the SR 500 components must

be cleaned, inspected and prepared for

reuse (e.g. charge the batteries).

4.1 Cleaning

Sundström cleaning tissues SR 5226

that clean and disinfect are

recommended for daily care.

If the equipment is more heavily fouled,

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.

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Snap off the valve cover from the valve

seat.

Slip of the membrane

Clean the valve seat and check that the

valve seat is ok

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Clean the exhalation membrane

Clean the valve cover on the inside and

outside.

6.2 Storage

After cleaning, store the equipment in a

dry and clean place at room

temperature.

Store the face shield with the visor in

the fully raised or fully lowered position.

Avoid exposing it to direct sunlight.

Storage temperature: from -4°F to

104°F (-20 °C to +40 °C) at a relative

humidity below 90 %.

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6.3 Maintenance schedule

The schedule represents the minimum

requirements for maintenance routines

in order to ensure that equipment will

always be in functional condition.

6.5 To change the exhalation membrane

Snap off the valve cover.

The cover must be changed at the same

time as the membrane. Proceed as

follows.

Slip off the membrane.

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