AirBench AOF, Руководство по эксплуатации и обслуживанию

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Air inlet
When maintaining the filters it is also required to carry
out a clean on the air inlet spigot, these have a mesh
fitted internally (as pictured).
This mesh over time will start to become restrictive and
will require cleaning, the mesh is used to stop any large
pieces of swarf from entering the mist filter and blocking
filters.
While cleaning your pre-filter(s) it is best practice to clean
the mesh with a brush to ensure good airflow into the
mist filter.
Failure to do this will result in the system showing a false
restriction in the pre-filter and will reduce system
efficiency
Final Filter (HEPA)
The final stage filter (HEPA) is not serviceable and should
not be cleaned.
P-Type filter life expectancy 9 -12 months
S-Type filter life expectancy 2 - 3 years (single shift)