Sundstrom SR500EX User manual

SR500EXex PAPR Copyright © 2020 by The S.E.A. Group 1

SR500EXex PAPR Copyright © 2020 by The S.E.A. Group 2
Companion module:
Sundström SR500ex PAPR —HOW TO…
Related material:
Sundström filters

SR500EXex PAPR Copyright © 2020 by The S.E.A. Group 3
About your SR500ex PAPR:
What is it?
The SR500ex is a PAPR, which stands for
Powered Air-Purifying Respirator.
Powered means battery-driven.
Air-purifying means filtering.
Respirator means that your lungs are separated
from the surrounding contaminated
atmosphere.
ex means that the PAPR is certified as
intrinsically safe, that is, it can be used in many
potentially explosive or flammable atmospheres.
How does it work?
A battery-driven fan draws in the surrounding air
through a pair of filters that clean the air from
harmful substances. The clean air is then
delivered to a face piece or air hood around your
face or head.
The air pressure inside the mask or hood is
higher than the surrounding air, which means
that outside air cannot leak into the head piece.
Components
The SR500ex PAPR is made up of three main
parts:
•The fan unit with filters, motor, fan, and
a waist belt.
•The breathing hose that delivers the
cleaned air to your face.
•The head piece, usually the SR540ex
intrinsically safe head-top. Other EX-
certified face shields and helmets may
also be used, along with the SR200 tight-
fitting full-face mask.

SR500EXex PAPR Copyright © 2020 by The S.E.A. Group 4
IMPORTANT: when selecting suitable filters and
head pieces, certain factors must be taken into
consideration. It is best to consult a qualified
person with training and experience in risk-
assessment. Crucial factors include:
•Types of contaminants
•Concentrations
•Work load and breathing rate*
•Explosive or flammable atmosphere
•Other types of safety equipment that
may be required
*) The breathing rate is important, because the SR500ex
delivers air at a maximum flow rate of 175 litres per minute
(normal mode) or 225 l/min (boost mode). If you are using a
loose-fitting head piece, and your peak inhalation air flow is
greater than the supply rate, outside air will leak into the
head piece.
Where can the SR500ex be used?
The SR500ex PAPR can be used wherever
negative-pressure filter respirators are allowed
or recommended, including potentially explosive
environments.
Because the fan unit helps to draw air through
the filters, and because it delivers the air at
pressure to the face and lungs, the PAPR is
particularly suited for situations where work is
hard, warm or long-term.
The battery
•Lithium-ion battery
•Can be recharged at least 500 times
•Available as standard (2.2 Ampere
hours) or heavy duty (3.6 Ah)
•Can be recharged at any time —no need
to wait until completely drained
•Charging time: less than 2 hours
The fan unit
•Operating time up to 13 hours
•Single-button operation
•Normal speed (175 litres/minute) and
boost speed (225 l/min)
•Visual display panel shows normal/boost
operation, disrupted air flow, low
battery power
•Additional vibration and sound alarms
•Automatic air flow control
•Can be used with a variety of head
pieces

SR500EXex PAPR Copyright © 2020 by The S.E.A. Group 5
Particle filter
•Class P3 high-efficiency particle filter
•Available as threaded filter that screws
directly into the fan unit, or as non-
threaded through a filter adapter
•The non-threaded particle filter can be
fitted to the front of all gas filters
Gas filters
Several types of gas filters are available:
•A2 (organic vapour)
•ABE1 (organic vapour, inorganic vapour,
acid gas)
•A1BE2K1 (organic vapour, inorganic
vapour, acid gas, ammonia)
•A1BE2K1-Hg-P3 (organic vapour,
inorganic vapour, acid gas, ammonia,
mercury vapour + particles)
IMPORTANT: There are two filter ports. Identical
filters or filter combinations must be fitted to
both filter ports. You must not fit one type of
filter to one port, and another type of filter to
the other.
When should the SR500ex respirator NOT be
used?
•When the fan motor is turned off for any
reason
•If there is not enough oxygen for human
breathing in the ambient atmosphere
•If the contaminant is unknown
•If the contaminant is Immediately
Dangerous to Life and Health (IDLH)
•If the ambient atmosphere is oxygen-
enriched or pure oxygen
•If breathing becomes difficult
•If you can smell or taste any
contaminant
•If you feel dizzy or nauseous, or suffer
any discomfort

SR500EXex PAPR Copyright © 2020 by The S.E.A. Group 6
Before using the respirator:
•Make sure the SR500ex PAPR and all its
parts are clean, intact, and correctly
assembled
•Make sure the appropriate filters are
fitted to the fan unit
•If gas filters are used, particle filters
must be fitted to the front of each gas
filter
•A pre-filter must be attached to each
particle filter
•Make sure the battery is fully charged
•Do a performance check and test the
alarms
•Make sure you are familiar with the
equipment and know how to use it