AAF International SAAF:DBA - Manual (Page 6)

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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 DBA
with Gas Phase Chemical Media is useful for effective installation,
operation and maintenance. The system is designed for the most
challenging applications where heavy Airborne Molecular
Contaminant (AMC) loading is anticipated. Examples of such
contaminants may be high concentrations of chlorine gas leaking
from a cylinder inside a room. The method of contaminant removal is
through a combination of the physical property of adsorption and/or
the chemical process of oxidation through chemical media. AAF offers
a variety of impregnated and un-impregnated dry granular media to
handle a wide range of contamination problems, including nuclear
contamination, bio-hazard contamination, and chemical (gas)
contamination. For more information on AAF’s gas phase air
cleaning products contact your AAF representative.
3.0 Installation Instructions
Consult the product drawing(s) submitted on this order
before proceeding.
3.1 Space Requirements
A minimum of 36” clear space must be available at the manway and
sample ports of the DBA to perform routine maintenance and it is
recommended that 24" clear space be available on top of the filling
port. Additional space may be required for inlet and outlet ductwork.
3.2 Foundations, Supports and Anchoring
The foundation and/or supports must be designed to be adequate
to support the DBA 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. See sales drawings for anchor bolt location,
secure all anchor bolts to ensure that the DBA is firmed attached to
the foundation. The DBA is designed for operation in indoor or, with
appropriate modifications to resist weather, outdoor locations. The
equipment is not specifically designed to resist and operate under
unusual dynamic loading situations such as high winds or
earthquake conditions. If the equipment is required to function in
such circumstances special precautions may be required to ensure
that the equipment will remain intact, anchored and functioning. If this
situation applies consult with a qualified professional engineer before
installing the equipment.
3.3 Equipment Erection
Spreader bars must be used at all times when handling the DBA to
prevent any possibility of damage. These shall be connected to the
lifting lugs provided on the DBA for this purpose. Only personnel
experienced in rigging and handling heavy equipment shall be
employed to erect the DBA.
3.4 Connection of Inlet and Outlet Ducts
Connect the inlet duct to the drilled and flanged inlet(s) of the DBA.
Connect the clean air duct to the drilled and flanged outlet. Consult
the Industrial Ventilation Manual for detailed construction guidelines.
When attaching inlet and outlet ducts, seal the flanges appropriately
to insure that no leakage will occur during operation.
WARNING: The DBA is not designed to support the weight of inlet
and outlet ducts. All ducts shall be supported independently of the
housing. Any attempt to support the ducts from the DBA may result in
serious equipment damage and severe personal injury.
3.5 Ladder and Handrail Assembly (if any)
It is necessary to install the access ladder and handrails after
assembling the collector. Refer to the installation drawings supplied
with the equipment for details on positioning and securing them into
the place with bolts.
3.6 Chemical Media Installation
In order to maximize the life of the gas phase chemical media, it is
recommended that media installation be the final installation task
before start-up and commissioning of the system. In preparation for
media installation it is recommended that the following be completed:
• Completely clean the system to remove all construction debris and
dirt, sweep and vacuum to remove visible dirt.
It is recommended that all cleaning materials used in the system
be free of solvents. If this is unavoidable it is recommended that
sufficient time be allowed for complete drying to occur and for the
VOCs to disperse before installing the media.