AAF International Front Access Housings User Manual

Better Air is Our Business
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SAAF Front Access Housings
with SAAF Cassette Gas Phase Chemical Filters
Installation, Operation and Maintenance Instructions
Table of Contents
1.0 Introduction
1.1 About this document
1.2 Packaging and shipping, receiving and inspection, handling, and storage
1.3 Product descriptions
1.4 Product model designations
1.5 Product drawings
1.6 Assembly — general comments
1.7 Related system equipment
2.0 Principles of Operation
3.0 Installation Instructions
3.1 Space requirements
3.2 Foundations and anchoring
3.3 Typical Front Access Housing (FAH) details
3.4 General filter bank erection procedure
3.5 Preparation for filter installation
3.6 Gas phase chemical filter installation
3.7 Prefilter installation
3.8 Pressure gauge
3.9 After-filters
5.4 Removal and replacement of particulate and gas phase chemical filters
5.5 Disposal of used filters
5.6 Gaskets
5.7 General system maintenance
6.0 Troubleshooting
6.1 High pressure drop reading across the filter system
6.2 Visible discharge of particulate
6.3 Odors and smells
7.0 Spare Parts List
8.0 Equipment Characteristics, Operating Weights, and Shipping Weights
1.0 Introduction
1.1 About this Document
This document contains the information necessary to properly receive, assemble, install, operate, and maintain the AAF Front Access Housing (FAH) filter bank and filters. The purchaser, installer, and operator of the filter system MUST read and comply with this document in its entirety prior to installation of the equipment and its operation. Failure to comply with the requirements of this manual may void the product warranty.
4.0 Start-up Instructions
5.0 Maintenance
5.1 Prefilter
5.2 After-filter
5.3 Gas phase filter monitoring
CAUTION
These instructions are specific to the AAF Front Access Housing (FAH) filter bank and filters. All ancillary tasks including, but not limited to, electrical and mechanical work, equipment handling, and safety procedures must be performed in accordance with industry accepted practice and all relevant local, state, and federal government codes, laws, and policies.
1.2 Packaging and Shipping, Receiving and Inspection, Handling and Storage
1.2.1 Packaging and Shipping: Unless otherwise defined in the
purchase order and agreed by AAF, the FAH and filters are packaged for domestic transit and shipped FOB the AAF factory. The method of shipment will be as specified in the customers purchase order to AAF.
1.2.2 Receiving and Inspection: Obtain a copy of the purchase order, the product drawing that was submitted by AAF in association with the order, and a copy of the bill of lading, along with any other shipping papers. Upon receipt of the equipment, or any part thereof, these documents shall be used to ensure that the correct product has been received.
For maximum protection, complete the following steps upon receipt of the FAH filter bank and filters:
— Inspect the shipment and all associated documentation. Notify the carrier immediately if there is any visible damage to the packaging or the equipment, or a discrepancy in the shipping papers and, if necessary, file an immediate claim with the carrier against such damage or discrepancy.
— Confirm that the equipment received agrees with the contents of the shipping papers.
— Confirm that the shipping documents agree with the purchase order. Refer to the product drawing submitted for the order as necessary.
— If it is determined that any equipment ordered on the purchase order has not been delivered and is not accounted for in the shipping papers contact AAF international immediately by calling 1-800-477-1214. Reference the AAF control number which will be listed on the shipping papers.
Each shipment may include:
— Individually packaged Front Access Housings. — Packaged particulate filters. — Packaged gas phase chemical filter cassettes. Note that the housings and the particulate and gas phase filters
may ship from different locations and be received at different times.
At all times the equipment shall be protected from exposure to weather. The equipment shall be stored in a clean, dry, temperature controlled environment. All items shall be stored on pallets so that they are elevated above grade. The Front Access Housings and particulate and gas phase filters shall not be stacked more than three (3) cartons high to prevent crushing. Only FAH shall be stacked on FAH, particulate filters on particulate filters, and gas phase filters on gas phase filters. The gas phase filters ship inside a carton enclosed in transparent protective plastic. Under no circumstances shall the filters be removed from this plastic protection until immediately prior to installation.
Filter products shall not be stored in areas where they may become contaminated by chemicals, either acids or alkalis, in liquid, vapor, or gaseous form.
1.3 Product Descriptions
1.3.1 Front Access Housing (FAH): Each FAH will be received
individually in a carton. Depending on the quantity supplied, these cartons may be palletized and banded together. The FAH is supplied in three styles: Type MD, Type HD, or Type CG (as shown at top of page 3) and will be the full size 2 high x 2wide housings shown, or depending on the size of the filter bank required, may include half size housings. Half size housings are available in half height (1 high x 2wide) or half width (2high x 1wide) sizes, except for the Type CG which is only provided in the half width size. Half size housings hold half the number of gas phase cassettes as full size housings and use half size particulate filters.
Any particular filter bank will be assembled using only one type of housing (Type MD, Type HD or Type CG). Housing types will never be mixed in a single filter bank.
1.3.2 Gas Phase Chemical Filter Cassettes: Gas phase filter cassettes are shipped in cartons and plastic bags. The carton shown contains a single 6 high x 24 wide x 18 deep Type MD cassette which is supplied as two (2) 6 high x 12 wide x 18 deep half cassettes.
1.2.3 Handling and Storage: Following receipt, inspection, and acceptance of the equipment, and prior to assembly and installation, the FAH and the particulate and gas phase filters shall be handled with great care. The components shall be retained and stored in their protective packaging until immediately prior to installation. Care shall be taken to ensure that the packages are not dropped or subjected to any impact loads.
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Model FAH-202-2P-MD housing holds four (4) MD cassettes.
Model FAH-202-2P-HD housing holds two (2) HD cassettes.
The three (3) types of gas phase chemical filter cassettes that can be supplied are as follows:
Model FAH-202-2P-CG housing holds two (2) CG cassettes.
Leaving air face of the housings is shown.
6 high x 24 wide x 18 deep Type MD cassette ships in two halves.
12 high x 24 wide x 12 deep Type HD cassette ships in two halves.
24 high x 12 wide x 12 deep Type CG cassette ships in one piece.
1.3.3 Particulate filters: Particulate filters will typically be AAF PerfectPleat¤pleated filters. Depending on the size of the filter frame ordered 24 high x 24 wide x 2 deep full size filters, 24 high x 12 wide x 2 deep, or 12 high x 24 wide x 2 deep half size filters may be supplied. PerfectPleat 2 deep filters are packaged 12 to a carton.
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1.4 Product Model Designations
The FAH model is designated as follows:
FAH - 202 — 2P — MD
Supports Type MD cassettes
Supports a 2 deep particulate pre-filter, if required.
Is nominally 2 high x 2wide
Front Access Housing
FAH model numbers available are:
Type MD Type HD Type CG
FAH-202-2P-MD FAH-202-2P-HD FAH-202-2P-CG FAH-102-2P-MD FAH-102-2P-HD FAH-201-2P-CG FAH-201-2P-MD FAH-201-2P-HD
The assembled filter bank model number is typically designated as follows:
FAH - 608 - 2P - MD
In this case the - 608 - indicates a filter bank that is nominally 6high x 8wide.
1.5 Product Drawings
Details of individual Front Access Housings are shown on the following AAF drawings:
FAH AAF Drawing Number
FAH-202-2P-MD 114D-3026127 FAH-102-2P-MD 114D-3027273 FAH-201-2P-MD 114D-3027281 FAH-202-2P-HD 114D-3027869 FAH-102-2P-HD 114D-3027901 FAH-201-2P-HD 114D-3027877 FAH-202-2P-CG 114D-3027539 FAH-201-2P-CG 114D-3027513
Copies of the appropriate drawings will have been supplied as part of the AAF submittals in response to the purchase order. Obtain and review these drawings before proceeding with the assembly and installation of the filter bank. The assembled filter bank drawings include the following details for filter bank sizes 102 (1 high x 2 wide) through 812 (8 high x 12wide):
— Overall filter bank dimensions — Shipping weights — Operating weights — Sizes and quantities of Front Access Housings required — Sizes and quantities of filters required — Details of the gas phase chemical media supplied — Details of the particulate filters supplied — Pressure losses across the filter bank at nominal airflow design
velocities
— Installation and assembly details
1.6 Assembly — General Comments
As indicated previously, the individual components that will comprise the filter bank will ship separately and will be required to be assembled and installed on site. Refer to Section 3.0, Installation Instructions, of this manual for further detailed instructions. Consult with an experienced installer to obtain an accurate estimate of the time, personnel, and equipment resources and tools that will be required to complete the assembly and installation of the filter bank. Site assembly will be limited to moving and lifting individual components with a maximum weight of approximately 55 pounds (25 kg), riveting or screwing components together, and caulking.
Completion of the following preparations and provision of the following items will be the responsibility of the installer or others:
— Site preparation — Stainless steel rivets, as required — Caulk, as required — Sheet metal, or other duct, as required — Sheet metal perimeter blank-off panels, as required
These items will not be supplied by AAF unless noted specifically in the AAF quotation and in the accepted customer purchase order.
Details of the assembled filter banks are shown on the following AAF drawings:
FAH Filter Bank AAF Drawing Number
FAH-XXX-2P-MD 114D-3027919 FAH-XXX-2P-HD 114D-3028271 FAH-XXX-2P-CG 114D-3027919
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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: Aminimum 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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