Sundstrom SR561 Technical manual

2020-05-06
OI06H-5018 SR 561 1
Operation instruction
SR 561
Hood
Revision: 03

General information
Instructions for use for SR 561 should be read before use.
The SR 561 together with fan unit SR 500 / SR 500 EX / SR 700 and approved filters are included in the
Sundström fan-assisted respiratory protective device system conforming to EN 12941/EN 12942:1998 class TH3.
Combination of SR 561-SR 500 EX is specially constructed for use in potentially explosive and fire hazardous
environments. See user instructions or label on fan unit for classification.
SR 561 together with compressed air attachment SR 507 conforming to EN 14594:2005 class 3A/3B.
When selecting equipment for SR 561 some of the factors that should be considered 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.
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Unpacking SR 561
Packing list:
• Hood with breathing hose
• User instructions
• Cleaning tissue
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1. Assembly
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1.1 Check that the O-ring of
the hose is in place.
1.2 Connect the hose to the
fan unit or the compressed air
attachment….
1.3 …and turn it clockwise
about 1/ 8 of a turn.

2. Functional check
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2.1 Place the facepiece in the
bag and grip the opening of
the bag so that it seals
around the breathing hose.
Grip the flow meter with the
other hand and hold it so that
it points vertically up from the
bag.
2.2 Read the position of the
ball in the tube. It should float
level with or just above the
marking on the tube.
If the flow rate is below the minimum value, check that
• The flow meter is vertical.
• The float can move freely.
• The air supply is not restricted by kinks or other restrictions in the
hoses.

3. Donning
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3.1. Grip both sides of the
hood opening with your
hands.
3.2 Insert your chin into the
hood. Keep your grip of the
hood and draw it over your
head.
3.3 Adjust the neck size of the
hood by means of the elastic
neck strap.

3. Donning
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3.4 If necessary, adjust the
circumference of the head
harness by means of the knob
at the rear of the head harness.
The knob is on the inside of the
hood behind the hose. You can
reach it without taking off the
hood. Turn clockwise to tighten
and counterclockwise to widen.
If necessary, adjust the head
harness in height by
lengthening or shortening the
strap for the top of the head.
3.5 Make sure that the
breathing hose runs along
your back and is not twisted.

4. Change the sweatband
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4.1 The sweatband is
secured with velcro tape to
the forehead band.
Pull the sweatband off.
4.2 Fit the velcro strip with the
ruffled side towards the
forehead strap and with relief
upwards.

5. Change the Tyvec hood, Harness
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5.1 Release the hose from
the adapter.
5.2 Release the three press-
studs at the top edge of the
visor.
Turn the hood inside out.
5.3 Release the press stud
from the hose attachment and
pull the hood off the head
harness.
5.4 Place the new hood in
front of you, with the visor
facing up.

5. Change the Tyvec hood, Harness
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5.5 Place the adapter in the
air channel.
5.6 Attach the press stud to
the hose attachment and pull
the hood over the head
harness.
5.7 Fix the head harness with
the three press studs onto the
upper edge of the visor. Start
with the middle one.
Mount the hose in the adapter
5.8 Check that the head
harness is straight in the
hood and that the hose
passage of the hood is not
twisted around the hose.