Sundstrom SR561 Installation and user guide

SR561 supplied-air hood —How to Copyright © 2020 by The S.E.A. Group 1

SR561 supplied-air hood —How to Copyright © 2020 by The S.E.A. Group 2
…assemble the SR561 head-top
BEFORE YOU START:
Check that the equipment is complete in
accordance with the packing list and has not
been damaged in transport.
Packing list:
•Hood with breathing hose.
•User instructions
•Cleaning tissue
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.
Check that the O-ring of the hose is in place

SR561 supplied-air hood —How to Copyright © 2020 by The S.E.A. Group 3
Connect the hose to the fan unit and turn it
clockwise about 1/ 8 of a turn.
…put on the hood
Hold the hood upside down. Grip each side of
the hood opening with one hand.
Pull the hood down so that the head harness fits
firmly and comfortably around your head.
Adjust the neck size of the hood by means of the
elastic neck strap.
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 counter
clockwise to widen.

SR561 supplied-air hood —How to Copyright © 2020 by The S.E.A. Group 4
If necessary, adjust the head harness in height by
lengthening or shortening the strap for the top
of the head.
Make sure that the breathing hose runs along
your back and is not twisted.
…remove the hood
Leave the polluted area before taking the
equipment off.
Slacken the neck band. In emergency situations,
the hood can be taken off with the rubber band
tightened.
Take the hood off. Switch off the fan, release the
belt and take the fan unit off.

SR561 supplied-air hood —How to Copyright © 2020 by The S.E.A. Group 5
…clean the head-top
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.
N.B. Never use a solvent for cleaning.
…store the head-top and parts
After cleaning, store the equipment in a dry and
clean place at room temperature. Avoid
exposing it to direct sunlight. The flow meter can
be turned inside out and can be used as storage
bag for the head-top.
…schedule maintenance
The schedule represents the minimum
requirements for maintenance routines in order
to ensure that equipment will always be in
functional condition.

SR561 supplied-air hood —How to Copyright © 2020 by The S.E.A. Group 6
…change the sweatband
The sweatband is secured with velcro tape to the
forehead band. Proceed as follows: Pull the
sweatband off.
Fit the velcro strip with the ruffled side towards
the forehead strap and with relief upwards.
…change the Tyvek hood
Release the three press-studs at the top edge of
the visor.
Turn the hood inside out.

SR561 supplied-air hood —How to Copyright © 2020 by The S.E.A. Group 7
Release the press-stud at the hose mounting and
pull the hood off the hose.
Place the new hood in front of you, with the
visor facing up.
Thread the hose from the inside of the hood,
through the passage at the rear of the hood.
After hose has been inserted, the head harness
should be the right way up in the hood.
Insert the hose coupling between the
reinforcement lips in the hose passage of the
hood, and secure it with the press-stud.
Insert the head harness into the hood.

SR561 supplied-air hood —How to Copyright © 2020 by The S.E.A. Group 8
Secure it with the three press-studs at the top of
the visor. Start with the centre press-stud.
Check that the head harness is straight in the
hood and that the hose passage of the hood is
not twisted around the hose.
…change the hose
Release the three press-studs at the top edge of
the visor.
Turn the hood inside out.

SR561 supplied-air hood —How to Copyright © 2020 by The S.E.A. Group 9
Release the press-stud at the hose mounting and
pull the hood off the hose.
Turn the locknut a quarter of a turn to remove it.
Use polygrip pliers if the locknut is stiff to turn.
Thread the pin on one side of the hose coupling
down through the recess in the head harness.
Turn the hose through 180 degrees and insert
the second pin.
Pull the hose out of the hood.

SR561 supplied-air hood —How to Copyright © 2020 by The S.E.A. Group 10
One coupling of the hose is fitted with an O-ring.
Thread the new hose with this end first from the
inside of the hood, through the passage at the
rear of the hood.
Fit the new hose to the head harness in the
reverse order.
Snap the press-stud shut at the hose mounting.
Insert the head harness into the hood.
Secure it with the three press-studs at the top of
the visor. Start with the centre press-stud.

SR561 supplied-air hood —How to Copyright © 2020 by The S.E.A. Group 11
Check that the head harness is straight in the
hood and that the hose passage of the hood is
not twisted around the hose.
…change the head harness
Follow relevant parts of the above instructions
dealing with changing the hose.