210.100-IOM (JUL 2018)
Page 36
ACUAIR
®
HYGIENIC AIR UNITS
INSTALLATION
Figure 44 – Installation of
HEPA Filter Frames
HEPA FILTERS
FILTER RETAINER
CLIPS MUST BE
ATTACHED TO
SIDES ONLY
HAT
AIRFLOW
AIRFLOW
FILTER CLIPS INSTALLED
FILTER CLIP INSTALLATION
SEE DETAIL A
FLAT SEALING
SURFACE
GASKET SEAL
HEPA FILTER
GASKET SEAL
DETAIL A
HOLDING FRAME
GASKET
TOP
AIRFLOW
AIRFLOW
High-efficiency particulate air (HEPA) filters are installed in
hygienic air units when extreme control of discharge airborne
particles is required. These filters are rated on the percentage
of 3 micron size particulates they capture. In order to achieve
the desired filtration success the filter manufacturer checks
each filter for integrity prior to shipment.
For ultimate success, the HEPA filters must be handled
properly, installed correctly and the final installation verified.
1. HEPA filters must be handled such that neither the air
entering nor the air leaving side of the filters are subjected
to poking pressures. Sharp objects may directly compromise
the filtration media. General concentrated pressure may
compromise the media by forcing it against the internal
aluminum pleat separators.
If unprotected HEPA filters are placed on dirty surfaces prior
to installing them in the AcuAir unit filter frames they become
subjected to unnecessary contamination and possibly long
term hygienic compromise.
2. In order for HEPA filtration to properly control discharge
air particulate count bypass air must be eliminated. AcuAir
HEPA filters include gaskets to seal between the filter and the
filter rack. During the installation process it is important to
verify the cleanliness of both the gasket and the filter frame
to assure a continuous seal.
HEPA filters must be installed with the filter pleats running
vertically. Contrary to the installation of other rigid filters
where vertical pleats are a best practice, for HEPA filters this
orientation is a must.
3. Although the HEPA filter manufacture inspects every HEPA
filter prior to leaving the factory, it is necessary to scan HEPA
filters after installation to verify that there are no pinhole leaks
and no bypass air. Most pinhole leaks and bypass holes can
be repaired in the field.
Summary of Contents for AcuAir
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