8
RESPIRATOR OPERATION
AIR QUALITY
This respirator must be supplied with clean
breathable air, Grade D or better, at all times.
The RPB® NOVA 2000 does not purify air or
filter contaminants. Breathable air must be
supplied to the point of attachment of the
RPB® NOVA 2000 air supply hose.
Supplied breathing air must at least meet
the requirements for Type 1 gaseous
air described in the Compressed Gas
Association Commodity Specifications G.7.1
(Grade D or higher).
AIR SOURCE
Locate the air source in a clean air
environment, always use a filter on the inlet
of your air source. Do not park vehicles
beside your air inlet as this will cause carbon
monoxide to be drawn into your air supply.
Use suitable aftercoolers / dryers with filters
and carbon monoxide alarms to assure clean
breathable air is supplied at all times.
The air should be regularly sampled to
ensure that it meets Grade D requirements.
BREATHING AIR PRESSURE
The air pressure must be continually
monitored at the point of attachment
while the air is flowing to the respirator.
Air pressure must be read from a reliable
pressure gauge whilst the respirator has air
flowing through it.
!WARNING!
Failure to supply the respirator
with the minimum required pressure at
the point of attachment for the length
of air supply hose used could result in
contaminants being inhaled as the pressure
in the helmet may become negative due to
peak inhalation flow when working at very
high work rates.
The RPB® NOVA 2000 BREATHING AIR
PRESSURE TABLE on Page 10 defines the
air pressure ranges needed to provide the
respirator with a volume of air which falls in
the required range of 6 - 15 cfm or 170 - 425
lpm.
BREATHING AIR SUPPLY HOSE AND
FITTINGS
NIOSH approved RPB® NOVA 2000 air supply
hoses must be used between the point of
attachment and the respirator breathing air
connection at the wearer’s belt. RPB® NOVA
2000 quick disconnect fittings must be used
to connect the hose lengths together. The
hose sections must be within the approved
length and the amount of sections must be
within the number specified in the Breathing
Air Pressure Table.
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