AAF International Front Access Housings - Manual (Page 5)

NO WELDING WILL BE REQUIRED.
In general, assembly of the filter bank will consist of the following:
— Preparation of the installation location
— Transportation of all components to the installation location
— Unpacking the Front Access Housings
— Assembling and installing the Front Access Housings
— Sealing the filter bank perimeter to prevent by-pass of unfiltered air
— Unpacking gas phase chemical filter cassettes
— Installing gas phase chemical filter cassettes
— Unpacking particulate filters
— Installing particulate filters
— Cleaning the site
— Start-up and commission of the filter system
1.7 Related System Equipment
Ventilation systems will often include other equipment including but
not limited to:
— Fan(s)
— Dampers
— Weather louvers
— Air tempering equipment
— Other filter banks
— Instrumentation
— Electronic instrumentation and controls
— Ductwork
Neither the interface of these items with the filter system supplied by
AAF, nor the installation, operation and maintenance of these items is
covered in this manual.
Whether these items are supplied by AAF or by others, consult the
documentation specific to these products for appropriate instructions.
2.0 Principles of Operation
An understanding of the design and operating principle of the Front
Access Housings with Gas Phase Chemical Filters is useful for
effective installation, operation and maintenance. The system is
intended to remove gaseous contaminants from intake, re-circulated,
or discharged ventilation air. Examples of such contaminants may be
nuisance odors and smells that may cause domestic and
neighborhood discomfort and reduce workplace productivity, or harmful
gases that may cause damage to health, plant and product in industrial
applications. The heart of the system is the AAF SAAF Cassette. This
is a high impact plastic frame that supports various types of dry,
granular, chemical media between perforated screens that allow air to
move through the filter. The SAAF Cassette is designed to support the
chemical media in a V-bank configuration of media beds that maximizes
the media exposed to the air stream, reduces the air stream velocity
through the media bed, maximizes energy efficiency, and maximizes the
removal of contaminants and the life of the product. The method of
contaminant removal is through a combination of the physical property of
adsorption and the chemical process of oxidation. AAF offers a variety of
impregnated and un-impregnated dry granular media to handle a wide
range of contamination problems. For more information on AAF s gas
phase air cleaning products contact your AAF representative.
The AAF Front Access Housing (FAH) is one of the various framing
and support systems designed to support the SAAF Cassette in the
air stream and to allow easy installation, operation and maintenance
of the system.
3.0 Installation Instuctions
Consult the product drawing(s) submitted on this order before
proceeding.
3.1 Space Requirements: A minimum of 24 clear space must be
available at the rear, or downstream side, of the filter bank and 36
clear space at the front, or upstream side, of the filter bank for access
to perform routine maintenance. Additional space may be required for
inlet and outlet ductwork.
3.2 Foundations and Anchoring: The foundation must be designed to
be adequate to support the filter bank operating weight, and any
seismic, live or other loads (if any), with a sufficient factor of safety as
determined to comply with the requirements of all applicable governing
codes, standards, and laws. Ensure that the foundation surface is level
and smooth before proceeding. The filter frame is designed for
operation in indoor locations without any unusual loading condition,
other than the static loading from the filters and the pressure loss
across the filter bank. For this reason, the lower housings are not
intended to be anchored to the foundation. If anchors are used the
installer shall ensure that the anchor heads do not interfere with the
installation of the lowest tier of gas phase filter cassettes. If the frame
bank is required to withstand unusual or dynamic loads, then special
anchoring arrangements featuring removable supports may be required.
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