SECTION MINOR HVAC DEMOLITION

Transcription

1 PART 1 GENERAL 1.01 SECTION INCLUDES A. HVAC demolition. 1. Exhaust Fans 2. Ductwork 3. Aire Terminal Units 1.02 RELATED REQUIREMENTS SECTION MINOR HVAC DEMOLITION A. Section Testing, Adjusting, and Balancing for HVAC B. Additional requirements for alterations work SUBMITTALS A. See Section Administrative Requirements, for submittal procedures. B. Demolition Plan: Submit a written plan indicating the specific approach for HVAC demolition. C. Project Record Documents: Indicate deficiencies that would prevent proper use of systems to achieve performance. 1. Submit draft copies of Project Record Documents for review prior to final acceptance of Project. Provide final copies for Architect and for inclusion in closeout documentation. 2. Provide Project Record Documents in clear format complete with project identification. Include set of drawings with duct and inlets and outlets identified to correspond locations. 3. Include the following in the Project Record Documents: a. Name of company completing work. b. Address of company completing work. c. Telephone number of company completing work. d. Project name. e. Project location. f. Project Architect. g. Project Engineer. h. Project Contractor. i. Report date. j. Ductwork: 1) Identify size of supply, return and or exaust. 2) Identify type of construction. 3) Identify type and thickness of insulation. 4) Identify location of riser. Include location. PART 2 PRODUCTS 2.01 MATERIALS AND EQUIPMENT A. Materials and equipment for patching and extending work: As specified in individual sections. PART 3 EXECUTION 3.01 EXAMINATION A. Verify field measurements and duct arrangements are as shown on Drawings. B. Verify that abandoned ductwork and equipment serve only abandoned facilities. C. Demolition drawings are based on casual field observation. D. Report discrepancies to Architect before disturbing existing installation. E. Beginning of demolition means installer accepts existing conditions PREPARATION A. Disconnect HVAC systems in walls, floors, a.nd ceilings to be removed MINOR HVAC DEMOLITION

2 3.03 DEMOLITION AND EXTENSION OF EXISTING HVAC WORK A. Remove, relocate, and extend existing installations to accommodate new construction. B. Remove abandoned ductwork to source of supply. C. Remove exposed abandoned ductwork, including abandoned ductwork above accessible ceiling finishes. Cut ductwork flush with walls and floors, and patch surfaces. D. Disconnect abandoned air outlets and inlets and remove. Remove abandoned air outlets and inlets if ductwork servicing them is abandoned and removed. Provide blank covers for abandoned air outlets and inlets that are not removed. E. Remove exhaust fans as noted. F. Remove piping as noted. G. Repair adjacent construction and finishes damaged during demolition and extension work. H. Maintain access to existing HVAC installations that remain active. Modify installation or provide access panel as appropriate. I. Extend existing installations using materials and methods as specified CLEANING AND REPAIR A. Clean and repair existing materials and equipment that remain or that are to be reused. END OF SECTION MINOR HVAC DEMOLITION

3 PART 1 GENERAL 1.01 SECTION INCLUDES SECTION TESTING, ADJUSTING, AND BALANCING FOR HVAC A. Testing, adjustment, and balancing of air systems. B. Measurement of final operating condition of HVAC systems RELATED REQUIREMENTS A. Section Minor HVAC Demolition 1.03 REFERENCE STANDARDS A. AABC MN-1 - AABC National Standards for Total System Balance; Associated Air Balance Council; B. ASHRAE Std 111 -Practices for Measurement, Testing, Adjusting and Balancing of Building Heating, Ventilation, Air-Conditioning, and Refrigeration Systems; American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc.; C. NEBS (TAB)- Procedural Standards for Testing Adjusting Balancing of Environmental Systems; National Environmental Balancing Bureau; 2005, Seventh Edition. D. SMACNA (TAB)- HVAC Systems Testing, Adjusting, and Balancing; Sheet Metal and Air Conditioning Contractors' National Association; SUBMITTALS A. See Section Administrative Requirements, for submittal procedures. B. Control System Coordination Reports: Communicate in writing to the controls installer all setpoint and parameter changes made or problems and discrepancies identified during TAB that affect, or could affect, the control system setup and operation. C. Final Report: Indicate deficiencies in systems that would prevent proper testing, adjusting, and balancing of systems and equipment to achieve specified performance. 1. Revise TAB plan to reflect actual procedures and submit as part of final report. 2. Submit draft copies of report for review prior to final acceptance of Project. Provide final copies for Architect and for inclusion in operating and maintenance manuals. 3. Include actual instrument list, with manufacturer name, serial number, and date of calibration. 4. Form of Test Reports: Where the TAB standard being followed recommends a report format use that; otherwise, follow ASHRAE Std Units of Measure: Report data in 1-P (inch-pound) units only. 6. Include the following on the title page of each report: a. Name of Testing, Adjusting, and Balancing Agency. b. Address of Testing, Adjusting, and Balancing Agency. c. Telephone number of Testing, Adjusting, and Balancing Agency. d. Project name. e. Project location. f. Project Architect. g. Project Engineer. h. Project Contractor. i. Report date. D. Project Record Documents: Record actual locations of flow measuring stations. PART 2 PRODUCTS- NOT USED PART 3 EXECUTION 3.01 GENERAL REQUIREMENTS A. Perform pre-modification system measurement of existing systems TESTING, ADJUSTING, AND BALANCING FOR HVAC

4 B. Perform total system balance in accordance with one of the following: 1. AABC MN-1, AABC National Standards for Total System Balance. 2. ASH RAE Std 111, Practices for Measurement, Testing, Adjusting and Balancing of Building Heating, Ventilation, Air-Conditioning, and Refrigeration Systems. 3. NEBB Procedural Standards for Testing Adjusting Balancing of Environmental Systems. 4. SMACNA HVAC Systems Testing, Adjusting, and Balancing. C. Begin work after completion of systems to be tested, adjusted, or balanced and complete work prior to Substantial Completion of the project. D. TAB Agency Qualifications: 1. Having minimum of three years experience EXAMINATION A. Testing, adjustment, and balancing of air systems. B. Verify that systems are complete and operable before commencing work. Ensure the following conditions: 1. Systems are started and operating in a safe and normal condition. 2. Temperature control systems are installed complete and operable. 3. Proper thermal overload protection is in place for electrical equipment. 4. Final filters are clean and in place. If required, install temporary media in addition to final filters. 5. Duct systems are clean of debris. 6. Fans are rotating correctly. 7. Air outlets are installed and connected. 8. Duct system leakage is minimized. C. Submit field reports. Report defects and deficiencies that will or could prevent proper system balance. D. Beginning of work means acceptance of existing conditions PREPARATION A. Hold a pre-balancing meeting at least one week prior to starting TAB work. 1. Require attendance by all installers whose work will be tested, adjusted, or balanced. B. Provide instruments required for testing, adjusting, and balancing operations. Make instruments available to Architect to facilitate spot checks during testing. C. Provide additional balancing devices as required ADJUSTMENT TOLERANCES A. Air Handling Systems: Adjust to within plus or minus 5 percent of design for supply systems and plus or minus 10 percent of design for return and exhaust systems. B. Air Outlets and Inlets: Adjust total to within plus 10 percent and minus 5 percent of design to space. Adjust outlets and inlets in space to within plus or minus 10 percent of design RECORDING AND ADJUSTING A. Ensure recorded data represents actual measured or observed conditions. B. Permanently mark settings of valves, dampers, and other adjustment devices allowing settings to be restored. Set and lock memory stops. C. Mark on the drawings the locations where traverse and other critical measurements were taken and cross reference the location in the final report. D. After adjustment, take measurements to verify balance has not been disrupted or that such disruption has been rectified. E. Leave systems in proper working order, replacing belt guards, closing access doors, closing doors to electrical switch boxes, and restoring thermostats to specified settings TESTING, ADJUSTING, AND BALANCING FOR HVAC

5 3.06 AIR SYSTEM PROCEDURE A. Adjust air handling and distribution systems to provide required or design supply, return, and exhaust air quantities. B. Make air quantity measurements in ducts by Pitot tube traverse of entire cross sectional area of duct. C. Measure air quantities at air inlets and outlets. D. Adjust distribution system to obtain uniform space temperatures free from objectionable drafts and noise. E. Use volume control devices to regulate air quantities only to extend that adjustments do not create objectionable air motion or sound levels. Effect volume control by duct internal devices such as dampers and splitters. F. Vary total system air quantities by adjustment offan speeds. Provide drive changes required. Vary branch air quantities by damper regulation. G. Provide system schematic with required and actual air quantities recorded at each outlet or inlet. H. For variable air volume system powered units set volume controller to air flow setting indicated. Confirm connections properly made and confirm proper operation for automatic variable air volume temperature control. I. On fan powered VAV boxes, adjust air flow switches for proper operation SCOPE A. Test, adjust, and balance the following: 1. Air Handling Units 2. Air Terminal Units 3. Air Inlets and Outlets 3.08 MINIMUM DATA TO BE REPORTED A. Air Moving Equipment: 1. Location 2. Manufacturer 3. Model number 4. Serial number 5. ArrangemenVCiass/Discharge 6. Air flow, actual 7. Return air flow, actual 8. Outside air flow, actual 9. Total static pressure (total external), actual 10. Inlet pressure 11. Discharge pressure 12. Sheave Make/Size/Bore 13. Number of Belts/Make/Size 14. Fan RPM B. Duct Traverses: 1. System zone/branch 2. Duct size 3. Area 4. Test velocity 5. Test air flow 6. Duct static pressure C. Terminal Unit Data: 1. Manufacturer 2. Type, constant, variable, single, dual duct TESTING, ADJUSTING, AND BALANCING FOR HVAC

6 3. Identification/number 4. Location 5. Model number 6. Size 7. Minimum static pressure 8. Minimum design air flow 9. Maximum design air flow 10. Maximum actual air flow 11. Inlet static pressure D. Air Distribution Tests: 1. Room number/location 2. Test (final) air flow END OF SECTION TESTING, ADJUSTING, AND BALANCING FOR HVAC

7 PART 1 GENERAL 1.01 SECTION INCLUDES A. Metal ductwork. B. Nonmetal ductwork. C. Duct cleaning RELATED REQUIREMENTS A. Section Air Terminal Units. B. Section Air Outlets and Inlets. SECTION HVAC DUCTS AND CASINGS C. Section Testing, Adjusting, and Balancing for HVAC REFERENCE STANDARDS A. ASHRAE (FUND)- ASHRAE Handbook- Fundamentals; B. ASTM A36/A36M- Standard Specification for Carbon Structural Steel; C. ASTM A653/A653M- Standard Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc Iron Alloy-Coated (Galvannealed) by the Hot-Dip Process; D. ASTM E84- Standard Test Method for Surface Burning Characteristics of Building Materials; 2013a. E. SMACNA (DCS)- HVAC Duct Construction Standards; F. SMACNA (FGD)- Fibrous Glass Duct Construction Standards; Sheet Metal and Air Conditioning Contractors' National Association; G. UL 181 -Standard for Factory-Made Air Ducts and Air Connectors; Underwriters Laboratories Inc.; Current Edition, Including All Revisions QUALITY ASSURANCE A. Manufacturer Qualifications: Company specializing in manufacturing the type of products specified in this section, with minimum three years of experience. B. Installer Qualifications: Company specializing in performing the type of work specified in this section, with minimum three years of experience FIELD CONDITIONS PART 2 PRODUCTS 2.01 DUCT ASSEMBLIES A. All Ducts: Galvanized steel, unless otherwise indicated. B. Low Pressure Supply (System with Cooling Coils): 1/2 inch w.g. pressure class, galvanized steel. C. Return and Relief: 1/2 inch w.g. pressure class, galvanized steel. D. General Exhaust: 1/2 inch w.g. pressure class, galvanized steel MATERIALS A. Galvanized Steel for Ducts: Hot-dipped galvanized steel sheet, ASTM A653/A653M FS Type B, with G60/Z180 coating. B. Joint Sealers and Sealants: Non-hardening, water resistant, mildew and mold resistant. 1. Type: Heavy mastic or liquid used alone or with tape, suitable for joint configuration and compatible with substrates, and recommended by manufacturer for pressure class of ducts. 2. Surface Burning Characteristics: Flame spread of zero, smoke developed of zero, when tested in accordance with ASTM E84. State Project # HVAC DUCTS AND CASINGS

8 C. Hanger Rod: ASTM A36/A36M; steel; threaded both ends, threaded one end, or continuously threaded DUCTWORK FABRICATION A. Fabricate and support in accordance with SMACNA HVAC Duct Construction Standards and as indicated. B. No variation of duct configuration or size permitted except by written permission. Size round duct installed in place of rectangular ducts in accordance with ASHRAE Handbook Fundamentals. C. Provide duct material, gages, reinforcing, and sealing for operating pressures indicated. D. Increase duct sizes gradually, not exceeding 15 degrees divergence wherever possible; maximum 30 degrees divergence upstream of equipment and 45 degrees convergence downstream. E. Fabricate continuously welded round and oval duct fittings in accordance with SMACNA HVAC Duct Construction Standards FIBROUS GLASS DUCTS A. Fibrous Glass Ducts: 1 inch thick rigid glass fiber with aluminum foil, glass scrim and Kraft or plastic jacket vapor barrier; maximum 0.23 K value at 75 degrees F. 1. UL labeled to UL 181. B. Fabricate in accordance with SMACNA Fibrous Glass Duct Construction Standards, except as indicated. C. Machine fabricate fibrous glass ducts and fittings. Make only minor on site manual adjustments. D. Do not use fibrous glass ducts within 12 inches of electric or fuel fired heaters. PART 3 EXECUTION 3.01 INSTALLATION A. Install, support, and seal ducts in accordance with SMACNA HVAC Duct Construction Standards. B. Install in accordance with manufacturer's instructions. C. During construction provide temporary closures of metal or taped polyethylene on open ductwork to prevent construction dust from entering ductwork system. D. Duct sizes indicated are inside clear dimensions. For lined ducts, maintain sizes inside lining. E. Locate ducts with sufficient space around equipment to allow normal operating and maintenance activities CLEANING A. Clean duct systems with high power vacuum machines. Protect equipment that could be harmed by excessive dirt with filters, or bypass during cleaning. Provide adequate access into ductwork for cleaning purposes. END OF SECTION HVAC DUCTS AND CASINGS

9 PART 1 GENERAL 1.01 SECTION INCLUDES A. Constant volume terminal units RELATED REQUIREMENTS SECTION AIR TERMINAL UNITS A. Section HVAC Ducts and Casings SUBMITTALS A. See Section Administrative Requirements for submittal procedures. B. Product Data: Provide data indicating configuration, general assembly, and materials used in fabrication. Include catalog performance ratings that indicate air flow, static pressure, and NC designation. Include electrical characteristics and connection requirements. C. Shop Drawings: Indicate configuration, general assembly, and materials used in fabrication, and electrical characteristics and connection requirements. D. Manufacturer's Installation Instructions: Indicate support and hanging details, and service clearances required. E. Project Record Documents: Record actual locations of units. F. Operation and Maintenance Data: Include manufacturer's descriptive literature, operating instructions, maintenance and repair data, and parts lists. Include directions for resetting constant volume regulators. G. Warranty: Submit manufacturer warranty and ensure forms have been completed in State of Missouri Office of Administration, Div FMDC's name and registered with manufacturer QUALITY ASSURANCE A. Manufacturer Qualifications: Company specializing in manufacturing the type of products specified in this section, with minimum three years of documented experience. B. Products Requiring Electrical Connection: Listed and classified by Underwriters Laboratories Inc. as suitable for the purpose specified and indicated WARRANTY A. See Section Closeout Submittals, for additional warranty requirements. B. Provide five year manufacturer warranty for air terminal units. PART 2 PRODUCTS 2.01 MANUFACTURERS A. Price Product As indicated on drawings.. B. Other acceptable manufacturers offering equivalent products MANUFACTURED UNITS A. Ceiling mounted fan powered supply air control terminals for connection to single duct, central air systems, with mechanical constant volume control. B. Identify each terminal unit with clearly marked identification label and air flow indicator. Include unit nominal air flow, maximum factory set airflow, minimum factory set air flow, and coil type. PART 3 EXECUTION 3.01 INSTALLATION A. Install in accordance with manufacturer's instructions. B. Support units individually from structure. Do not support from adjacent ductwork. C. Connect to ductwork in accordance with Section State Project # AIR TERMINAL UNITS

10 D. Verify that electric power is available and of the correct characteristics ADJUSTING A. Reset volume with damper operator attached to assembly allowing flow range modulation from 1 00 percent of design flow to 0 percent full flow SCHEDULES A. Provide as indicated on drawings. END OF SECTION AIR TERMINAL UNITS

11 PART 1 GENERAL 1.01 SECTION INCLUDES A. Diffusers. B. Registers/grilles RELATED REQUIREMENTS SECTION AIR OUTLETS AND INLETS A. Section Painting and Coating: Painting of ducts visible behind outlets and inlets REFERENCE STANDARDS A. AMCA 500-L- Laboratory Methods of Testing Louvers for Rating; Air Movement and Control Association International, Inc.; B. ASH RAE Std 70- Method of Testing the Performance of Air Outlets and Inlets; American Society of Heating, Refrigerating and Air Conditioning Engineers, Inc.; 2006 (R2011 ) SUBMITTALS A. See Section Administrative Requirements for submittal procedures. B. Product Data: Provide data for equipment required for this project. Review outlets and inlets as to size, finish, and type of mounting prior to submission. Submit schedule of outlets and inlets showing type, size, location, application, and noise level. C. Project Record Documents: Record actual locations of air outlets and inlets QUALITY ASSURANCE A. Test and rate air outlet and inlet performance in accordance with ASHRAE Std 70. B. Test and rate louver performance in accordance with AMCA 500-L QUALITY ASSURANCE A. Manufacturer Qualifications: Company specializing in manufacturing the type of products specified in this section, with minimum three years of documented experience. PART 2 PRODUCTS 2.01 MANUFACTURERS A. Carnes Company HVAC: B. Krueger: C. Price Industries: D. Titus: RECTANGULAR CEILING DIFFUSERS A. Provide as indicated Air Outlet/Inlet Device Schedule on drawings CEILING SUPPLY REGISTERS/GRILLES A. Provide as indicated Air Outlet/Inlet Device Schedule on drawings CEILING EXHAUST AND RETURN REGISTERS/GRILLES A. Provide as indicated Air Outlet/Inlet Device Schedule on drawings CEILING EGG CRATE EXHAUST AND RETURN GRILLES A. Provide as indicated Air Outlet/Inlet Device Schedule on drawings WALL SUPPLY REGISTERS/GRILLES A. Provide as indicated Air Outlet/Inlet Device Schedule on drawings AIR OUTLETS AND INLETS

12 PART 3 EXECUTION 3.01 INSTALLATION A. Install in accordance with manufacturer's instructions. B. Check location of outlets and inlets and make necessary adjustments in position to conform with architectural features, symmetry, and lighting arrangement. C. Install diffusers to ductwork with air tight connection. D. Provide balancing dampers on duct take-off to diffusers, and grilles and registers, despite whether dampers are specified as part of the diffuser, or grille and register assembly. E. Paint ductwork visible behind air outlets and inlets matte black. Refer to Section SCHEDULES A. Indicated on drawings. END OF SECTION AIR OUTLETS AND INLETS