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

210.100-IOM (JUL 2021)
Page 37
AcuAir Hygienic Air Units
Installation
Figure 46: Installing HEPA lter frames
HEPA lters
FILTER RETAINER
CLIPS MUST BE
AT TACHED 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 preferable ltration success the
lter manufacturer checks each lter for integrity before
shipment.
For ultimate success, the HEPA lters must be handled cor-
rectly, 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 sub-
jected 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
before installing them in the AcuAir
®
unit lter frames
they become subjected to unnecessary contamination
wand possibly long term hygienic compromise.
2. In order for HEPA ltration to correctly control dis-
charge 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 cleanli-
ness of both the gasket and the lter frame to assure a
continuous seal.
Install HEPA lters with the lter pleats running verti-
cally. 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 before leaving the factory, it is necessary to
scan HEPA lters after installation to verify that there
are no pinhole leaks and no bypass air. It is possible to
repair most pinhole leaks and bypass holes in the eld.