System Description; Applications - Sundstrom SR 500 EX Notice D'utilisation

1. General information
2. Parts
3. Use
4. Maintenance
5. Technical specification
6. Key to symbols
7. Approval
8. Worn-out products
1. General information
Use of a respirator must be part of a respiratory
protection program. For advice see EN 529:2005 or
AS/NZS 1715:2009. The guidance contained in these
standards highlights important aspects of a respiratory
protective device program but does not replace
national or local regulations.
If you feel uncertain about the selection and care of the
equipment, consult your work supervisor or get in
touch with the sales outlet. You are also welcome to get
in touch with the Technical Service Department at
Sund ström Safety AB.

1.1 System description

The SR 500 EX is a battery-powered fan unit that,
together with filters and an approved head top, is
included in the Sundström fan-assisted respiratory
protective device systems conforming to EN 12941 or
12942 and the Sundström Powered Air Purifying
Respirator (PAPR) system conforming to AS/NZS
1716:2012. The fan unit is to be equipped with filters,
and the filtered air is supplied through a breathing hose
to the head top. The above-atmos pheric pressure then
generated prevents pollutants from the surroundings
from penetrating into the head top.
The SR 500 EX should be used together with filters and
a head top - hood, face shield, helmet with visor or full
face mask - which must be obtained separately. Before
use, both these user instructions and those for the filter
and head top must be carefully studied.
Fan unit
The characteristics of the SR 500 EX are as follows:
• The charging time is about 2 hours.
• To be used with two filters/combined filters.
• Operating time of up to 6 hours.
• The same control is used for starting, stopping and
selection of operating status
• Display with the following symbols
o Small fan symbol that lights up with a green
light during normal operation.
o Bigger fan symbol that lights up with a green
light during boosted operation
o Triangle that lights up with a red light if the air
flow should cease or if the filters are clogged.
o Battery symbol that lights up with a yellow light
when the battery capacity is low.
• Initiates an alarm by sound/light signals in the event
of an obstruction in the air flow.
• Equipped with automatic air flow control.
• Can be used together with a hood, visor or full face
mask.
Fan unit SR 500 EX
Filters
See 3.1.2 Filters
Breathing hose
The breathing hose is not included with the fan unit
but is supplied with the relevant head top.
Head top
The choice of head top depends on the working
environment, work intensity and the required protection
factor. The following head tops are available for the
SR 500 EX:
• Class TH3 Hood, model number SR 520.
• Class TH3 hood, model number SR 530.
• Class TH3 Hood, model number SR 561.
• Class TH3 Hood, model number SR 562.
• Class TH3 Hood, model number SR 601.
• Class TH3 Hood, model number SR 602.
• Class TH3 visor, model number SR 540 EX.
• Class TH3 face shield, model number SR 570.
• Class TM3 full face mask, model number SR 200.
• Class TH3 helmet with visor, model number SR 580.

1.2 Applications

The SR 500 EX fan unit is specially designed for use in
explosive atmospheres, i.e. areas in which gaseous
and dust substances may occur in such concentrations
that they would become explosive in a normal oxygen
atmosphere and be ignited, for instance, by electrically
generated sparks or electrostatic discharges.
The SR 500 EX can be used as an alternative to filter
respirators in all situations for which these are
recommended. This applies particularly to work that is
hard, warm or of long-duration.
When selecting filters and head top, the following are
some of the factors that must be taken into account:
• Possible occurrence of explosive atmosphere
• Types of pollutants
• Concentrations
• Work intensity
• Protection requirements in addition to respiratory
protective device
The risk analysis should be carried by a person who
has suitable training and experience in the area. See
also sections 1.3 Warnings/limitations and 3.1.2 Filters.
1.3 Warnings/limitations
Note that there can be national differences in the
regula tions for use of respiratory protective equipment.
Warnings
The equipment must not be used
• In the power-off state. In this abnormal situation a rapid
build-up of carbon dioxide and depletion of oxygen
may occur in the head top and no protection is given.
• If the surrounding 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 you find it difficult to breathe.
• If you can smell or taste the pollutants.
EN
39