36C25622R0094 234000 HVAC AIR CLEANING DEVICES .docx
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- Z2DA--Project #502-19-107 - Replace AHU-104 - Construction - 36C25622R0094 Federal contract opportunity
- Solicitation number
- 502-19-107
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This document is a specification for HVAC air cleaning devices required for a project to replace an air handling unit and ductwork at a Department of Veterans Affairs health care facility. The specification requires medium efficiency pleated panel pre-filters rated at MERV 8, high efficiency extended surface cartridge filters rated at MERV 14/13/11, and associated filter housings, gauges, and instrumentation. Filter types, sizes, performance parameters, and warranty and testing requirements are defined. The related federal contract opportunity is for project number 502-19-107 to replace AHU-104 at the facility, issued by the Department of Veterans Affairs Veterans Health Administration VISN 16.
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REPLACE AHU #104 AND DUCTWORK BLDG. 7
DEPARTMENT OF VETERANS AFFAIRS HEALTH CARE SYSTEM-ALEXANDRIA, LA
PROJECT NO.: 502-19-107
SECTION 23 40 00
HVAC AIR CLEANING DEVICES
PART 1 GENERAL
1.1 DESCRIPTION
| A. | Air filters for heating, ventilating, and air conditioning. |
| B. | Definitions: Refer to ASHRAE Standard 52.2 for definitions of face velocity, net effective filtering area, media velocity, initial resistance (pressure drop), MERV (Minimum Efficiency Reporting Value), PSE (Particle Size Efficiency), particle size ranges for each MERV number, dust holding capacity and explanation of electrostatic media used filtration products versus mechanical filtration products. Refer to ASHRAE Standard 52.2 Appendix J for definition of MERV-A. |
1.2 RELATED WORK
| A. | Section 01 00 00, GENERAL REQUIREMENTS |
| B. | Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, AND SAMPLES. |
| C. | Section 23 05 11, COMMON WORK RESULTS FOR HVAC: General mechanical requirements and items, which are common to more than one section of Division 23. |
| D. | Section 23 08 00 – COMMISSIONING OF HVAC SYSTEMS: Requirements for commissioning, systems readiness checklists, and training. |
| E. | Section 23 37 00 AIR OUTLETS AND INLETS. |
F. Section 23 73 00, INDOOR CENTRAL-STATION AIR-HANDLING UNITS: Filter housing and racks.
1.3 QUALITY ASSURANCE
| A. | Air Filter Performance Report for Extended Surface Filters: |
| 1. | Submit a test report for each Grade of filter being offered. The report shall not be more than three (3) years old and prepared by using test equipment, method and duct section as specified by ASHRAE Standard 52.2 for type filter under test and acceptable to Resident Engineer, indicating that filters comply with the requirements of this specification. Filters utilizing partial or complete synthetic media will be tested in compliance with pre-conditioning steps as stated in Appendix J. All testing is to be conducted on filters with a nominal 24 inch by 24-inch face dimension. Test for 150 m/min (500 fpm) will be accepted for lower velocity rated filters provided the test report of an independent testing laboratory complies with all the requirements of this specification. |
| B. | Filter Warranty for Extended Surface Filters: Guarantee the filters against leakage, blowouts, and other deficiencies during their normal useful life, up to the time that the filter reaches the final pressure drop. Defective filters shall be replaced at no cost to the Government. |
| C. | Comply with UL Standard 900 for flame test. |
| D. | Nameplates: Each filter shall bear a label or name plate indicating manufacturer's name, filter size, and rated efficiency. |
1.4 SUBMITTALS
| A. | Submit in accordance with Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, AND SAMPLES. |
| B. | Manufacturer's Literature and Data: |
| 1. | Extended surface filters. |
| 2. | Holding frames. Identify locations. |
| 3. | Side access housings. Identify locations, verify insulated doors. |
| 4. | Magnehelic gages. |
| C. | Air Filter performance reports. |
| D. | Suppliers warranty. |
| E. | Field test results for HEPA filters as per paragraph 2.3.E.3. |
1.5 APPLICABLE PUBLICATIONS
| A. | The publications listed below form a part of this specification to the extent referenced. The publications are referenced in the text by basic designation only. |
| B. | American Society of Heating, Refrigerating and Air-conditioning Engineers, Inc. (ASHRAE): |
52.2-2017...........Method of Testing General Ventilation Air-Cleaning Devices for Removal Efficiency by Particle Size, including Appendix J
| C. | American Society of Mechanical Engineers (ASME): |
| NQA-1-2017 | Quality Assurance Requirements for Nuclear Facilities Applications |
| D. | Underwriters Laboratories, Inc. (UL): |
| 900; Revision 15 July 2015 | Test Performance of Air Filter Units |
PART 2 PRODUCTS
2.1 REPLACEMENT FILTER ELEMENTS TO BE FURNISHED
| A. | To allow temporary use of HVAC systems for testing and in accordance with Paragraph, TEMPORARY USE OF MECHANICAL AND ELECTRICAL SYSTEMS in Section 01 00 00, GENERAL REQUIREMENTS, provide one complete set of additional filters to the Resident Engineer. |
| B. | The Resident Engineer will direct whether these additional filters will either be installed as replacements for dirty units or turned over to VA for future use as replacements. |
2.2 EXTENDED SURFACE AIR FILTERS
| A. | Use factory assembled air filters of the extended surface type with supported or nonsupported cartridges for removal of particulate matter in air conditioning, heating, and ventilating systems. Filter units shall be of the extended surface type fabricated for disposal when the contaminant load limit is reached as indicated by maximum (final) pressure drop. |
| B. | Filter Classification: UL listed and approved conforming to UL Standard 900. |
| C. | HVAC Filter Types |
| HVAC Filter Types |
Table 2.2C
| MERV Value ASHRAE 52.2 |
| MERV-A Value ASHRAE 62.2 Appendix J |
| Application |
| Particle Size |
| Thickness /Type |
| 8 |
| 8-A |
| Pre-Filter |
| 3 to 10 Microns |
| 50 mm (2-inch) Throwaway |
| 13 |
| 13-A |
| After-Filter |
| 0.3 to 1 Microns |
| 150 mm (6-inch) or 300 mm (12-inch) Rigid Cartridge |
| 14 |
| 14-A |
| After-Filter |
| 0.3 to 1 Microns |
| 150 mm (6-inch) or 300 mm (12-inch) Rigid Cartridge |
2.3 Medium Efficiency Pleated Panel Pre-Filters (2”; MERV 8; UL 900 Class 2):
| A. | Construction: Air filters shall be medium efficiency ASHRAE pleated panels consisting of cotton and synthetic or 100% virgin synthetic media, self-supporting media with required media stabilizers, and beverage board enclosing frame. Filter media shall be lofted to a uniform depth and formed into a uniform radial pleat. The media stabilizers shall be bonded to the downstream side of the media to maintain radial pleats and prevent media oscillation. An enclosing frame of no less than 28-point high wet-strength beverage board shall provide a rigid and durable enclosure. The frame shall be bonded to the media on all sides to prevent air bypass. Integral diagonal support members on the air entering and air exiting side shall be bonded to the apex of each pleat to maintain uniform pleat spacing in varying airflows. |
| B. | Performance: The filter shall have a Minimum Efficiency Reporting Value of MERV 8 when evaluated under the guidelines of ASHRAE Standard 52.2. It shall also have a MERV-A of 8 when tested per Appendix J of the same standard. The media shall maintain or increase in efficiency over the life of the filter. Pertinent tolerances specified in Section 7.4 of the Air-Conditioning and Refrigeration Institute (ARI) Standard 850-2014 shall apply to the performance ratings. All testing is to be conducted on filters with a nominal 24” x 24” face dimension. |
| Minimum Efficiency Reporting (MERV) | |
| 8 |
| Dust Holding Capacity (Grams) |
| 105 |
| Nominal Size (Width x Height x Depth) |
| 24x24x2 |
| Rated Air Flow Capacity (Cubic Feet per Minute) |
| 2,000 |
| Rated Air Flow Rate (Feet per Minute) |
| 500 |
Final Resistance (Inches w.g.)
Maximum Recommended Change-Out Resistance (Inches w.g.)
1.0 0.66
| Rated Initial Resistance (Inches w.g.) |
| 0.33 |
C. The filters shall be approved and listed by Underwriters' Laboratories, Inc. as Class 2 when tested according to U. L. Standard 900 and CAN 4-5111.
2.4 High Efficiency Extended Surface (Intermediate/After (Final)) Cartridge Filters (12”; MERV 14/13/11; UL 900 Class 2):
| A. | Construction: Air filters shall consist of 8 pleated media packs assembled into 4 V-banks within a totally plastic frame. The filters shall be capable of operating at temperatures up to 80 degrees C (176 degrees F). The filters must either fit without modification or be adaptable to the existing holding frames. The molded end panels are to be made of high impact polystyrene plastic. The center support members shall be made of ABS plastic. No metal components are to be used. |
| B. | Media: The media shall be made of micro glass fibers with a water repellent binder. The media shall be a dual density construction, with coarser fibers on the air entering side and finer fibers on the air leaving side. The media shall be pleated using separators made of continuous beads of low profile thermoplastic material. The media packs shall be bonded to the structural support members at all points of contact, this improves the rigidity as well as eliminates potential air bypass in the filter |
| C. | Performance: Filters of the size, air flow capacity and nominal efficiency (MERV) shall meet the following rated performance specifications based on the ASHRAE 52.2-1999 test method. Where applicable, performance tolerance specified in Section 7.4 of the Air-Conditioning and Refrigeration Institute (ARI) Standard 850-2014 shall apply to the performance ratings. All testing is to be conducted on filters with a nominal 24"x24" header dimension. |
| Minimum Efficiency Reporting Value (MERV) |
Gross Media Area (Sq. Ft.)
Dust Holding Capacity (Grams)
Nominal Size (Width x Height x Depth)
24x24x12
Rated Air Flow Capacity (cubic feet per minute)
2,000
Rated Air Flow Rate (feet per minute)
Final Resistance (inches w.g.)
Maximum Recommended Change-Out Resistance (Inches w.g.)
2.0 0.68
Rated Initial Resistance (inches w.g.)
0.34
2.5 Filter Housings/Support Frames
| A. | Holding Frame Systems (HVAC Grade): |
| 1. | Air filter-holding frames shall be 16-gauge galvanized steel with filter sealing flange, centering dimples, sealing gasket and lances for appropriate air filter fasteners. Sizes shall be noted on drawings or other supporting materials. |
| 2. | Construction: Filter holding frame shall be constructed of 16-gauge galvanized steel. The frame shall be assembled from two corner sections and welded to assure a rigid and durable frame assembly. The frame shall include a variety of pre-punched lances for filter fastener attachment. Fastener shall be capable of being installed without the use of tools, nuts or bolts. Lance penetrations shall be upstream of filter flange to assure leak-free integrity. The frame shall include filter-centering dimples on each frame wall to facilitate ease of filter installation and assure filter centering against filter sealing flange. A 3/4” filter-sealing flange shall be an integral component of the holding frame. All corners shall be flush mitered and a permanently mounted polyurethane foam gasket shall be mounted on the sealing flange to assure filter to frame sealing integrity. |
| 3. | Manufacturer shall provide evidence of facility certification to ISO 9001:2015. |
| B. | Equipment Identification: Section 23 05 11, COMMON WORK RESULTS FOR HVAC AND STEAM GENERATON. |
2.6 Instrumentation
| A. | Magnehelic Differential Pressure Filter Gages: Nominal 100 mm (four inch) diameter, zero to 500 Pa (zero to two inch water gage), three inch for HEPA) range. Gauges shall be flush-mounted in aluminum panel board, complete with static tips, copper or aluminum tubing, and accessory items to provide zero adjustment. |
| B. | DDC static (differential) air pressure measuring station. Refer to Specification Section 23 09 23 DIRECT DIGITAL CONTROL SYSTEM FOR HVAC |
| C. | Provide one DDC sensor across each extended surface filter. Provide Petcocks for each gauge or sensor. |
| D. | Provide one common filter gauge for two-stage filter banks with isolation valves to allow differential pressure measurement. |
2.7 HVAC Equipment Factory filters
| A. | Manufacturer standard filters within fabricated packaged equipment should be specified with the equipment and should adhere to industry standard. |
| B. | Cleanable filters are not permitted. |
| C. | Automatic Roll Type filters are not permitted. |
PART 3 – EXECUTION
3.1 INSTALLATION
| A. | Install supports, filters and gages in accordance with manufacturer's instructions. |
| B. | Label clearly with words "Contaminated Air" on exhaust ducts leading to the HEPA filter housing. |
3.2 STARTUP AND TEMPORARY USE
| A. | Clean and vacuum air handling units and plenums prior to starting air handling systems. |
| B. | Replace Pre-filters and install clean filter units prior to final inspection as directed by the Resident Engineer. |
3.3 COmmissioning
| A. | Provide commissioning documentation in accordance with the requirements of Section 23 08 00 – COMMISSIONING OF HVAC SYSTEMS for all inspection, start up, and contractor testing required above and required by the System Readiness Checklist provided by the Commissioning Agent. |
| B. | Components provided under this section of the specification will be tested as part of a larger system. Refer to Section 23 08 00 – COMMISSIONING OF HVAC SYSTEMS and related sections for contractor responsibilities for system commissioning. |
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