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WA900-3EO
OVERVIEW
5
DUST-FREE
PRESSURISED
AIR TO HVAC
1. Dirty, hazardous air enters the filter assembly
through angled veins.
2. The veins cause the air flow to spin and move.
3. The spinning air flow is accelerated further by the
integrated pre-cleaner rotor. Centrifugal force throws
the heavier than air dirt and dust particles to the
outside walls ejector ports.
4. 90% + of the coarse dust and hazardous debris is
ejected safely away as this process extends the
lifecycle of the filter media.
5. An inner vortex is formed and only precleaned air
is drawn down into the filter chamber.
6. The pre-cleaned air is pushed through the easily
serviceable filter media rated for submicron dust
particle filtration. HEPA (High-efficiency Particulate
Air) media complies with OH&S guidance for
respirable silica, coal dust and mineral fibres down to
0.3-micron particles.
7. A variable speed centrifugal air pump generates
powerful pressurised air.
8. Clean, hazard free, pressurised air is delivered to
the operator’s cabin.
9. The pressurised air is mixed with the HVAC
systems return air.
HEPA Return Air Filter isolates HVAC system
thus provides highest protection factor for the
operator.
In essence, this part of the system controls dust
from shoes and clothes.
10. The air passes through the HVAC system and into
the cab.
11. Positive cabin pressure ensures a safe work
environment. Positive internal pressure repels
harmful, hazardous dust.
1
2
3
HEPA
RETURN
AIR
FILTER
SAFE
BREATHING
ZONE
OPTION:
HEPA AIR
SCRUBBER
PRE-CLEANER
HEPA
FILTRATION
12. The Breathesafe INPRESS unit monitors the
cabin pressure as measured through its built-in
pressure transducer and calculates the error based on
the pressure set-point. This value is applied to an
algorithm and the controller calculates a proportional
output which adjusts the speed of the pressuriser
motor.
13. If the cabin pressure drops below the set point a
visual and if fitted, an audible alarm is activated.
14. A backlit LCD, displays actual cabin pressure in
pascals on the top line and the time and date or any
alarms present, on the bottom line.
15. The digital interface allows the operator to easily
adjust the pressure set point and access additional
features.
CabinPressureDataLog
9
10
11
CabinPressureDataLog
12
12
13
15
16. Typically the processor can save up to 3.5 months
of data including date, time, pressure readings and
alarm instances. Data logs are easily downloadable
via a standard RS232 cable.
17. If required, remote data log access, report
analysis and management are available using the
4G network and customer support.
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PRESSURISED
AIR
50 pascals
8
