Johnson Controls Frick AcuAir - HEPA Filters; Installing HEPA Filter Frames

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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-efciency particulate air (HEPA) lters are installed in
hygienic air units when extreme control of discharge airborne
particles is required. These lters are rated on the percentage
of 3 micron size particulates they capture. In order to achieve
the desired ltration success the lter manufacturer checks
each lter for integrity prior to shipment.
For ultimate success, the HEPA filters must be handled
properly, installed correctly and the nal installation veried.
1. HEPA lters must be handled such that neither the air
entering nor the air leaving side of the lters are subjected
to poking pressures. Sharp objects may directly compromise
the ltration media. General concentrated pressure may
compromise the media by forcing it against the internal
aluminum pleat separators.
If unprotected HEPA lters are placed on dirty surfaces prior
to installing them in the AcuAir unit lter frames they become
subjected to unnecessary contamination and possibly long
term hygienic compromise.
2. In order for HEPA ltration to properly control discharge
air particulate count bypass air must be eliminated. AcuAir
HEPA lters include gaskets to seal between the lter and the
lter rack. During the installation process it is important to
verify the cleanliness of both the gasket and the lter frame
to assure a continuous seal.
HEPA lters must be installed with the lter pleats running
vertically. Contrary to the installation of other rigid lters
where vertical pleats are a best practice, for HEPA lters this
orientation is a must.
3. Although the HEPA lter manufacture inspects every HEPA
lter prior to leaving the factory, it is necessary to scan HEPA
lters 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 eld.