SECTION MOTORS FOR MECHANICAL EQUIPMENT

Transcription

1 SECTION MOTORS FOR MECHANICAL EQUIPMENT PART 1 GENERAL 1.01 SECTION INCLUDES A. Three phase electric motors REFERENCES A. ABMA STD 9- Load Ratings and Fatigue Life for Ball Bearings; American Bearing Manufacturers Association, Inc.. B. IEEE 112- IEEE Standard Test Procedure for Polyphase Induction Motors and Generators; Institute of Electrical and Electronic Engineers. C. NEMA MG 1 -Motors and Generators; National Electrical Manufacturers Association. D. NFPA 70- National Electrical Code; National Fire Protection Association SUBMITTALS A. See General and Special Conditions for submittal requirements and procedures. B. Product Data: Provide wiring diagrams with electrical characteristics, efficiency rating, power factor and connection requirements. C. Maintenance Data: Include assembly drawings, bearing data including replacement sizes, and lubrication instructions QUALITY ASSURANCE A. Conform to NFP A 70. B. Products Requiring Electrical Connection: Listed and classified by Underwriters Laboratories Inc. as suitable for the purpose specified and indicated DELIVERY, STORAGE, AND HANDLING A. Protect motors stored on site from weather and moisture by maintaining factory covers and suitable weather-proof covering. PART 2 PRODUCTS 2.01 GENERAL CONSTRUCTION AND REQUIREMENTS A. Electrical Service: 1. Motors: 200 volts for use on 208 volt service, three phase, 60 Hz. 460 volts for use on 480 volt service, three phase, 60 hz. B. Construction: 1. Open drip-proof type. 2. Design for continuous operation in 40 degrees C environment. 3. Design for temperature rise in accordance with NEMA MG 11imits for insulation class F for constant speed or class H for inverter duty, service factor, and motor enclosure type. 4. High efficiency. C. Visible Nameplate: Indicating motor horsepower, voltage, phase, cycles, RPM, full load amps, locked rotor amps, frame size, manufacturer's name and model number, service factor, power factor, efficiency. D. Wiring Terminations: 1. Provide terminal lugs to match branch circuit conductor quantities, sizes, and materials indicated. Enclose terminal lugs in terminal box sized to NFPA 70, threaded for conduit THREE PHASE POWER- SQUIRREL CAGE MOTORS A. Starting Torque: Between 1 and times full load torque. B. Starting Current: Six times full load current. PWA MOTORS FOR MECHANICAL EQUIPMENT

2 C. Power Output, Locked Rotor Torque, Breakdown or Pull Out Torque: NEMA Design B characteristics. D. Design, Construction, Testing, and Performance: Conform to NEMA MG 1 for Design B motors. E. Insulation System: NEMA Class F or H. F. Testing Procedure: In accordance with IEEE 112. Load test motors to determine free from electrical or mechanical defects in compliance with performance data. G. Motor Frames: NEMA Standard T -Frames of steel, aluminum, or cast iron with end brackets of cast iron or aluminum with steel inserts. H. Bearings: Anti-friction ball bearings, Lubricated for Life, if available. If not available, grease lubricated with housings equipped with provision for relubrication, rated for minimum ABMA STD 9, L-10 life of 200,000 hours. Calculate bearing load with NEMA minimum V -belt pulley with belt center line at end of NEMA standard shaft extension. Stamp bearing sizes on nameplate. I. Sound Power Levels: To NEMA MG 1. J. Nominal Efficiency: As scheduled, rated at full load and rated voltage when tested in accordance with IEEE 112. K. Nominal Power Factor: As scheduled at full load and rated voltage when tested in accordance with IEEE 112. L. Motor shall be dynamically balanced. M. Motor name plate shall be stamped on steel. Nameplate shall be mechanical fastened to motor. N. Bearings required to be grease lubricated shall be provided with extended copper tubing and grease fitting to permit maintenance while in operation. 0. Service factor shall be 1.15 (minimum) for sign wave application, and 1.0 (minimum) for inverter (adjustable speed drive) application. P. High efficiency, inverter duty motor suitable for use with pulse width modulated, variable frequency, adjustable speed drive. PART 3 EECUTION 3.01 INSTALLATION A. Install in accordance with manufacturer's instructions. B. Install securely on firm foundation. Mount ball bearing motors with shaft in any position. C. Check line voltage and phase and ensure agreement with nameplate. D. Fill lubrication tubing with grease with type recommended by the motor manufacture SCHEDULES A. Three Phase- Energy Efficient, Open Drip-Proof Performance: rpm. 1) NEMA Frame: 256T. 2) Minimum Percent Power Factor: 86. 3) Minimum Percent Efficiency: 91. END OF SECTION PWA MOTORS FOR MECHANICAL EQUIPMENT

3 SECTION TESTING, ADJUSTING, AND BALANCING FOR HV AC PART 1- GENERAL 1.1 SUMMARY A. Section Includes: 1. Balancing Air Systems: a. Constant-volume air systems. b. Variable-air-volume systems. 1.2 DEFINITIONS A. AABC: Associated Air Balance Council. B. NEBB: National Environmental Balancing Bureau. C. TAB: Testing, adjusting, and balancing. D. TABB: Testing, Adjusting, and Balancing Bureau. E. TAB Specialist: An entity engaged to perform TAB Work. 1.3 INFORMATIONAL SUBMITTALS A. Certified TAB reports. 1.4 QUALITY ASSURANCE A. TAB Contractor Qualifications: Engage a TAB entity certified by AABC NEBB or TABB. 1. TAB Technician: Employee of the TAB contractor and who is certified by AABC NEBB or TABB as a TAB technician. B. Instrumentation Type, Quantity, Accuracy, and Calibration: As described in ASHRAE 111, Section 5, "Instrumentation." C. ASHRAE Compliance: Applicable requirements in ASHRAE 62.1, Section "Air Balancing." D. ASHRAE/IESNA Compliance: Applicable requirements m ASHRAE/IESNA 90.1, Section "System Balancing." PART 2- PRODUCTS (Not Applicable) PART 3- EECUTION 3.1 EAMINATION A. Examine the Contract Documents to become familiar with Project requirements and to discover conditions in systems' designs that may preclude proper TAB of systems and equipment. B. Examine systems for installed balancing devices, such as test ports, gage cocks, thermometer wells, flow-control devices, balancing valves and fittings, and manual volume dampers. Verify that locations of these balancing devices are accessible. C. Examine the approved submittals for HV AC systems and equipment. D. Examine design data including HVAC system descriptions, statements of design assumptions for environmental conditions and systems' output, and statements of philosophies and assumptions about HV AC system and equipment controls. E. Examine ceiling plenums and underfloor air plenums used for supply, return, or relief air to verify that they meet the leakage class of connected ducts as specified in Section "Metal Ducts" and are properly separated from adjacent areas. Verify that penetrations in plenum walls are sealed and fire-stopped if required. F. Examine system and equipment installations and verify that field quality-control testing, cleaning, and adjusting specified in individual Sections have been performed. G. Examine HV AC equipment and filters and verify that bearings are greased, belts are aligned and tight, and equipment with functioning controls is ready for operation. H. Examine terminal units, such as variable-air-volume boxes, and verify that they are accessible and their controls are connected and functioning. PWA TESTING, ADJUSTING, AND BALANCING FOR HVAC

4 I. J. K. L. M. 3.2 A. 3.3 A. B. c. D. 3.4 A. B. c. D. E. F. G. H. I. J. K. 3.5 A. Examine strainers. Verify that startup screens are replaced by permanent screens with indicated perforations. Examine heat-transfer coils for correct piping connections and for clean and straight fins. Examine system pumps to ensure absence of entrained air in the suction piping. Examine operating safety interlocks and controls on HV AC equipment. Report deficiencies discovered before and during performance of TAB procedures. Observe and record system reactions to changes in conditions. Record default set points if different from indicated values. PREPARATION Prepare at AB plan that includes strategies and step-by-step procedures. GENERAL PROCEDURES FOR TESTING AND BALANCING Perform testing and balancing procedures on each system according to the procedures contained in SMACNA's "HVAC Systems- Testing, Adjusting, and Balancing" and in this Section. 1. Comply with requirements in ASHRAE 62.1, Section "Air Balancing." Cut insulation, ducts, pipes, and equipment cabinets for installation of test probes to the minimum extent necessary for TAB procedures. 1. After testing and balancing, patch probe holes in ducts with same material and thickness as used to construct ducts. 2. Install and join new insulation that matches removed materials. Restore insulation, coverings, vapor barrier, and finish according to Section "Duct Insulation," Section "HV AC Equipment Insulation," Section "HV AC Piping Insulation." Mark equipment and balancing devices, including damper-control positions, valve position indicators, fan-speed-control levers, and similar controls and devices, with paint or other suitable, permanent identification material to show final settings. Take and report testing and balancing measurements in inch-pound (IP) units. GENERAL PROCEDURES FOR BALANCING AIR SYSTEMS Prepare test reports for both fans and outlets. Obtain manufacturer's outlet factors and recommended testing procedures. Crosscheck the summation of required outlet volumes with required fan volumes. For variable-air-volume systems, develop a plan to simulate diversity. Determine the best locations in main and branch ducts for accurate duct-airflow measurements. Check airflow patterns from the outdoor-air louvers and dampers and the return- and exhaust-air dampers through the supply-fan discharge and mixing dampers. Locate start-stop and disconnect switches, electrical interlocks, and motor starters. Verify that motor starters are equipped with properly sized thermal protection. Check dampers for proper position to achieve desired airflow path. Check for airflow blockages. Check condensate drains for proper connections and functioning. Check for proper sealing of air-handling-unit components. Verify that air duct system is sealed as specified in Section "Metal Ducts." PROCEDURES FOR CONSTANT-VOLUME AIR SYSTEMS Adjust fans to deliver total indicated airflows within the maximum allowable fan speed listed by fan manufacturer. 1. Measure total airflow. a. Where sufficient space in ducts is unavailable for Pitot-tube traverse measurements, measure airflow at terminal outlets and inlets and calculate the total airflow. 2. Measure fan static pressures as follows to determine actual static pressure: a. Measure outlet static pressure as far downstream from the fan as practical and upstream from restrictions in ducts such as elbows and transitions. PWA TESTING, ADJUSTING, AND BALANCING FOR HVAC

5 b. Measure static pressure directly at the fan outlet or through the flexible connection. c. Measure inlet static pressure of single-inlet fans in the inlet duct as near the fan as possible, upstream from the flexible connection, and downstream from duct restrictions. d. Measure inlet static pressure of double-inlet fans through the wall of the plenum that houses the fan. e. Report the cleanliness status of filters and the time static pressures are measured. 3. Measure static pressures entering and leaving other devices, such as sound traps, heatrecovery equipment, and air washers, under final balanced conditions. 4. Comply with requirements in Sections for air-handling units for adjustment of fans, belts, and pulley sizes to achieve indicated air-handling-unit performance. 5. Do not make fan-speed adjustments that result in motor overload. Consult equipment manufacturers about fan-speed safety factors. Modulate dampers and measure fan-motor amperage to ensure that no overload will occur. Measure amperage in full-cooling, fullheating, economizer, and any other operating mode to determine the maximum required brake horsepower. B. Adjust volume dampers for main duct, submain ducts, and major branch ducts to indicated airflows within specified tolerances. 1. Measure airflow of submain and branch ducts. a. Where sufficient space in submain and branch ducts is unavailable for Pitot-tube traverse measurements, measure airflow at terminal outlets and inlets and calculate the total airflow for that zone. C. Adjust air outlets and inlets for each space to indicated airflows within specified tolerances of indicated values. Make adjustments using branch volume dampers rather than extractors and the dampers at air terminals. 1. Adjust each outlet in same room or space to within specified tolerances of indicated quantities without generating noise levels above the limitations prescribed by the Contract Documents. 2. Adjust patterns of adjustable outlets for proper distribution without drafts. 3.6 A. B. PROCEDURES FOR VARIABLE-AIR-VOLUME SYSTEMS Compensating for Diversity: When the total airflow of all terminal units is more than the indicated airflow of the fan, place a selected number of terminal units at a minimum set-point airflow with the remainder at maximum airflow condition until the total airflow of the terminal units equals the indicated airflow of the fan. Select the reduced-airflow terminal units so they are distributed evenly among the branch ducts. Pressure-Independent, Variable-Air-Volume Systems: After the fan systems have been adjusted, adjust the variable-air-volume systems as follows: 1. Set outdoor-air dampers at minimum, and set return- and exhaust-air dampers at a position that simulates full-cooling load. 2. Select the terminal unit that is most critical to the supply-fan airflow and static pressure. Measure static pressure. Adjust system static pressure so the entering static pressure for the critical terminal unit is not less than the sum of the terminal-unit manufacturer's recommended minimum inlet static pressure plus the static pressure needed to overcome terminal-unit discharge system losses. 3. Measure total system airflow. Adjust to within indicated airflow. 4. Set terminal units at maximum airflow and adjust controller or regulator to deliver the designed maximum airflow. Use terminal-unit manufacturer's written instructions to make this adjustment. When total airflow is correct, balance the air outlets downstream from terminal units the same as described for constant-volume air systems. 5. Set terminal units at minimum airflow and adjust controller or regulator to deliver the designed minimum airflow. Check air outlets for a proportional reduction in airflow the same as described for constant-volume air systems. PWA TESTING, ADJUSTING, AND BALANCING FOR HVAC

6 c. 3.7 A. B. c. 3.8 A. 3.9 A. B. c. a. If air outlets are out of balance at minimum airflow, report the condition but leave outlets balanced for maximum airflow. 6. Remeasure the return airflow to the fan while operating at maximum return airflow and minimum outdoor airflow. a. Adjust the fan and balance the return-air ducts and inlets the same as described for constant-volume air systems. 7. Measure static pressure at the most critical terminal unit and adjust the static-pressure controller at the main supply-air sensing station to ensure that adequate static pressure is maintained at the most critical unit. 8. Record final fan-performance data. Pressure-Dependent, Variable-Air-Volume Systems with Diversity: After the fan systems have been adjusted, adjust the variable-air-volume systems as follows: 1. Set system at maximum indicated airflow by setting the required number of terminal units at minimum airflow. Select the reduced-airflow terminal units so they are distributed evenly among the branch ducts. 2. Adjust supply fan to maximum indicated airflow with the variable-airflow controller set at maximum airflow. 3. Set terminal units at full-airflow condition. 4. Adjust terminal units starting at the supply-fan end of the system and continuing progressively to the end of the system. Adjust inlet dampers of each terminal unit to indicated airflow. When total airflow is correct, balance the air outlets downstream from terminal units the same as described for constant-volume air systems. 5. Adjust terminal units for minimum airflow. 6. Measure static pressure at the sensor. 7. Measure the return airflow to the fan while operating at maximum return airflow and minimum outdoor airflow. Adjust the fan and balance the return-air ducts and inlets the same as described for constant-volume air systems. PROCEDURES FOR CONDENSING UNITS Verify proper rotation of fans. Measure entering- and leaving-air temperatures. Record compressor data. TOLERANCES Set HV AC system's air flow rates and water flow rates within the following tolerances: 1. Supply, Return, and Exhaust Fans and Equipment with Fans: Plus or minus 10 percent. 2. Air Outlets and Inlets: Plus or minus 10 percent. 3. Heating-Water Flow Rate: Plus or minus 10 percent. 4. Cooling-Water Flow Rate: Plus or minus 10 percent. FINAL REPORT General: Prepare a certified written report; tabulate and divide the report into separate sections for tested systems and balanced systems. 1. Include a certification sheet at the front of the report's binder, signed and sealed by the certified testing and balancing engineer. 2. Include a list of instruments used for procedures, along with proof of calibration. Final Report Contents: In addition to certified field-report data, include the following: 1. Pump curves. 2. Fan curves. 3. Manufacturers' test data. 4. Field test reports prepared by system and equipment installers. 5. Other information relative to equipment performance; do not include Shop Drawings and product data. General Report Data: In addition to form titles and entries, include the following data: PWA TESTING, ADJUSTING, AND BALANCING FOR HVAC

7 1. Title page. 2. N arne and address of the TAB contractor. 3. Project name. 4. Project location. 5. Architect's name and address. 6. Engineer's name and address. 7. Contractor's name and address. 8. Report date. 9. Signature of TAB supervisor who certifies the report. 10. Table of Contents with the total number of pages defined for each section of the report. Number each page in the report. 11. Summary of contents including the following: a. Indicated versus final performance. b. Notable characteristics of systems. c. Description of system operation sequence if it varies from the Contract Documents. 12. Nomenclature sheets for each item of equipment. 13. Data for terminal units, including manufacturer's name, type, size, and fittings. 14. Notes to explain why certain final data in the body of reports vary from indicated values. 15. Test conditions for fans and pump performance forms including the following: a. Settings for outdoor-, return-, and exhaust-air dampers. b. Conditions of filters. c. Cooling coil, wet- and dry-bulb conditions. d. Face and bypass damper settings at coils. e. Fan drive settings including settings and percentage of maximum pitch diameter. f. Inlet vane settings for variable-air-volume systems. g. Settings for supply-air, static-pressure controller. h. Other system operating conditions that affect performance ADDITIONAL TESTS A. Seasonal Periods: If initial TAB procedures were not performed during near-peak summer and winter conditions, perform additional TAB during near-peak summer and winter conditions. END OF SECTION PWA TESTING, ADJUSTING, AND BALANCING FOR HVAC

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9 SECTION DUCT INSULATION PART 1 GENERAL 1.01 SECTION INCLUDES A. Duct insulation, rigid board SUBMITTALS A. See General and Special Conditions for submittal requirements and procedures. B. Product Data: Provide product description, thermal characteristics, list of materials and thickness for each service, and locations DELIVERY, STORAGE, AND PROTECTION A. Accept materials on site in original factory packaging, labelled with manufacturer's identification, including product density and thickness. B. Protect insulation from weather and construction traffic, dirt, water, chemical, and mechanical damage, by storing in original wrapping. PART 2 PRODUCTS 2.01 REQUIREMENTS FOR ALL PRODUCTS OF THIS SECTION A. Surface Burning Characteristics: Flame spread/smoke developed index of 25/50, maximum, when tested in accordance with ASTM E 84, NFPA 255, or UL DUCT LINER A. Duct liner shall be 1" thick,.24 'K' Value. Non-fiberglass, non-porus interior surface, with flame spread rating less that 25, and smoke development rating of less than 50. B Internal duct areas shall be completely covered with duct liner. Each ductwork section shall be covered with a single sheet per side of ductwork, scraps or pieces shall not be used. Longitudinal joints in corners shall be overlapping butt joints. Transverse joints shall be coated with adhesive at the shop prior to shipping the ductwork to the job site and at the time of installation the joints shall be recoated to adhere to one another. Metal nosing and longitudinal joint sealant shall be applied to the first four (4) sections of ductwork at the fan discharge. C Acoustical lining shall be a single layer of the thickness scheduled with 90% adhesive coverage applied to the ductwork and the liner applied mat face up. D Mechanically welded pins with push on metal heads shall be used on ducts larger than 12" x 12". Pins shall be copper or shall be as corrosion resistant as the G-90 coated galvanized steel. Spacing around the perimeter shall be 4" from longitudinal liner edges and at intervals not exceeding 12". Transversely the spacing shall be 3" from transverse joints and at intervals not exceeding 18". E F G At all locations of branch fittings, the edges of the main duct liner and the start of branch duct liner shall be sealed with duct liner adhesive. All rips, tears, or other damaged liners shall be repaired by coating the damaged area with liner adhesive. Sections that are not repairable shall be scraped and refabricated. Ductwork with internal lining shall be protected during shipping and at the job site to prevent the liner from getting wet. Ductwork shall not be stood on end or lay directly on the floor of buildings which are not weathertight. In the event that the liner becomes wet it shall be dried in accordance with the manufacturer's instructions. PWA DUCT INSULATION

10 2.04 ETERNAL DUCT WRAP A. Mineral-Fiber Blanket Insulation: Mineral or glass fibers bonded with a thermosetting resin. Comply with ASTM C 553, Type II and ASTM C 1290, Type II with factory-applied vinyl jacket. B Vinyl Jacket: White vinyl, with a permeance of 1.3 perms when tested according to ASTM E 96/E 96M, Procedure A, and complying with NFPA 90A and NFPA 90B, noncombustible, and rated for use in return plenums. PART 3 EECUTION 3.01 EAMINATION A. Verify that ducts have been pressure tested for leaks before applying insulation materials. Seal all identified leaks. B. Verify that surfaces are clean, foreign material removed, and dry INSTALLATION A. Install in accordance with manufacturer's written instructions and in accordance with recognized industry practices to ensure that insulation serves its intended purpose. B. Insulated ducts: 1. Provide insulation with vapor barrier jackets. 2. Finish with tape and vapor barrier jacket. 3. Continue insulation through walls, sleeves, hangers, and other duct penetrations unless otherwise noted. 4. Insulate entire system including fittings, joints and flanges. 5. Install insulation material with smooth and even surfaces and on clean and dry surfaces. Redo poorly fitted joints. Do not use mastic or joint sealer as filler for gapped joints and excessive voids resulting from poor workmanship. 6. Take adequate pre-cautions to assure that the duct insulation does not get wet. 7. Do not insulate until duct leakage has been stopped or acceptable. 8. Provide neatly beveled edge at interruption of insulation. Coat bare edges of insulation with mastic or sealant to prevent delamination. 9. Maintain integrity of vapor-barrier on ductwork insulation, and protect it to prevent puncture and other damage. 10. Repair damaged sections of existing mechanical insulation, damaged during this construction period. Use insulation of same thickness as existing insulation, install new jacket lapping and sealed over existing SCHEDULES A. Supply and return ductwork: Internally lined. B. Outdoor air intake and Exhaust air ductwork: Externally wrapped. C. Exposed spiral ductwork: Double-wall spiral with 1" factory insulation between walls. D. Where existing duct is removed and replaced, the intent is to match the existing ductwork insulation system. END OF SECTION PWA DUCT INSULATION

11 SECTION INSTRUMENTATION AND CONTROLS FOR HVAC PART 1 -GENERAL RELATED DOCUMENTS Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 1 Specification Sections, apply to this Section. 1.1 SUMMARYOFWORK A. This Section includes control equipment for HV AC systems and components, including control components for terminal heating and cooling units that are not supplied with factory wired controls. B. Extent of control systems work required by this section is indicated on the Drawings and by the requirements of this section. Control sequences are specified on the Drawings. C. Provide the following electrical work as work of this section, complying with requirements of Division 26 sections: 1. Control wiring between field installed controls, indicating devices, and unit control panels. 2. Interlock wiring between electrically operated equipment units; and between equipment and field installed control devices, including line voltage (120V) thermostats 3. Power supply wiring for power source to power connection on controls and/or unit control panels, including, but not limited to, air terminal unit controllers, control panels, damper actuators, and valve actuators. D. Related Sections include the following: 1. Individual Sections for HV AC equipment and systems to be controlled by the building temperature control system. 2. Section "Duct Accessories" for automatic control dampers, smoke and fire/smoke dampers mounted in HV AC systems and equipment. 3. Division 26 Section "Fire Alarm Systems" for fire and smoke detectors mounted in HV AC systems and equipment. 1.2 SYSTEM DESCRIPTION A. Control system shall consist of sensors, indicators, actuators, final control elements, interface equipment, other apparatus, accessories, and software connected to distributed controllers operating in multitasking, multi-user environment on an existing token-passing network and programmed to operate mechanical systems according to sequences of operation indicated or specified. B. The temperature control system requirements are defined throughout the Contract Drawings and Specifications, including but not limited to this Section, control schedules and diagrams on the Drawing, and references in the other Division specification sections. The party responsible for performance of this Section shall review the Documents thoroughly to determine system requirements. Any temperature control system requirement called for in one location in the contract Drawings and Specifications shall be considered a part of this Section as if fully repeated herein. C. The temperature control system shall either be based on a universal open protocol, or shall be compatible via interfaces, links and gateways with a universal open protocol; providing true open communication, interpretability, and integration of building subsystems. Refer to "References" subsection of this Section for examples of acceptable open protocols. D. The building temperature control system shall be directly compatible with the Columbia Public School District's standard system. Automated Logic corporation direct digital control with all electric and electronic systems, communication, and devices. All controls and devices installed under this project must be compatible with the DDC system already in place elsewhere in the Columbia Public School District. E. All devices to be factory mounted on equipment. Devices will be shipped from Automatic Controls to manufacturer for mounting in factory. PWA INSTRUMENTATION AND CONTROLS FOR HVAC

12 1.3 DEFINITIONS A. DDC: Direct-digital controls. B. LAN: Local area network C. MS!TP: Master-slave/token-passing D. BTCS: Building Temperature Control System 1.4 SEQUENCE OF OPERATION A. An Input/Output Summary Matrix and a written Sequence of Operation for each system appears in this section. 1.5 SUBMITTALS A. General: Submit each item in this Article according to the Conditions of the Contract and Division 1 Specification Sections. B. Product Data for each type of product specified. Include manufacturer's technical Product Date for each control device furnished, indicating dimensions, capacities, performance characteristics, electrical characteristics, finishes of materials, installation instructions, and startup instructions. C. Shop Drawings from manufacturer detailing equipment assemblies and indicating dimensions, weights, loadings, required clearances, and method of field assembly, components and location and size of each field connection. D. Shop Drawings containing the following information for each control system: 1. Schematic flow diagram showing fans, coils, dampers, valves, and control devices. 2. Each control device labeled with setting or adjustable range of control. 3. Diagrams for all required power, signal, and control electrical wiring. Clearly differentiate between factory-installed and field-installed wiring. 4. Details of control panel faces, including controls, instruments and labeling. 5. Schedule of control valves and control dampers including size, leakage and flow characteristics. 6. Written narrative of sequence of operation. E. Field Test Reports: Indicate and interpret test results for compliance with performance requirements. F. Maintenance data for control systems equipment to include in the operation and maintenance manual specified in Division 1. Include the following: 1. Maintenance instructions and spare parts lists for each type of control device. 2. Interconnection wiring diagrams with identified and numbered system components and devices. 3. Inspection period, cleaning methods, cleaning materials recommended, and calibration tolerances. 4. Keyboard illustrations and step-by-step procedures indexed for each operator function. 5. Calibration records and list of set points. G. Project Record Documents: Record actual locations of control components, including control units, thermostats, and sensors. Revise Shop Drawings to reflect actual installation and operating sequences. 1.6 QUALITY ASSURANCE A. Installer Qualifications: Engage an experienced Installer authorized by the manufacturer. B. Manufacturer Qualifications: Engage a firm experienced in manufacturing control systems identical to those already installed at for this Project Site and that have a record of successful inservice performance. C. Startup Personnel Qualifications: Engage specially trained personnel in direct employ of manufacturer of primary temperature control system. D. Comply with NFPA 90A. E. Comply with NFPA REFERENCED STANDARDS PW A INSTRUMENTATION AND CONTROLS FOR HVAC

13 A. ANSI/ASHRAE Standard :BACnet - A Data Communication Protocol for Building Automation and Control Networks, Atlanta, Georgia: American Society of Heating, Refrigerating, and Air Conditioning Engineers, B. ANSI/ATA 878.1, ARCNET Local Area Network Standard, New York: ANSI C. Echelon, Lon Talk Protocol Specification, Echelon corporation, 4015 Miranda Ave, Palo Alto, CA 94304, USA 1.8 DELNERY, STORAGE AND HANDLING A. Store equipment and materials inside and protected from weather. B. Factory-Mounted Components: Where control devices specified in this Section are indicated to be factory mounted on equipment, arrange for shipping control devices to unit manufacturer. 1.9 COORDINATION A. Coordinate location of thermostats and other exposed control sensors with plans and room details before installation. B. Coordinate equipment with Division 16 Section "Fire Alarm Systems to achieve compatibility with equipment that interfaces with that system. C. Coordinate supply of conditioned electrical circuits for control units and electrically-operated control devices. D. Dedicated 20 amp/120 volt AC circuit breakers are provided by Division 16 at panelboards located as shown on Drawings. From that point, the party responsible for performance of this Section shall furnish, install, and connect all required power supply to all electric powered control components furnished under this section. Furnish, install and connect transformers as required to serve lower voltage and/or DC components furnished under this section. Perform field electrical work in complete and strict accordance with Division 16 requirements and the National Electric Code. E. Coordinate equipment with Division 16 Section "Panelboards" to achieve compatibility with starter coils and annunciation devices. F. Coordinate equipment with Division 16 "Motor Control Centers" to achieve compatibility with motor starters and annunciation devices. G. Coordinate size and location of concrete bases. Cast anchor bolt inserts into bases. Concrete, reinforcement, and form work requirements are specified in Division 3 Section "Concrete". PART 2- PRODUCTS 2.1 MANUFACTURERS A. Sole Source Vendor: Subject to compliance with requirements, provide products and systems by automated Logic Corporation, as represented by Automatic Controls Equipment Systems, Inc. (ACES) of Fenton, Mr. Justin Vogt; (314) CONTROL PANELS A. Local control Panels: Utilized cabinet with suitable brackets for wall or floor mounting, located adjacent to each system under automatic control. Provide common keying for all panels. 1. Fabricate panels of 0.06-inch (1.5 mm) thick, furniture-quality steel, or extruded-aluminum alloy, totally enclosed, with hinged doors and keyed lock, with manufacturer's standard shop painted finish and color. 2. Panel Mounted Equipment: Temperature and humidity controllers, relays, and automatic switches; except safety devices. Mount devices with adjustments accessible through front of panel. 3. Door Mounted Equipment: flush mount (on hinged door) manual switches, including damper-positioning switches, changeover switches, thermometers, and gages. 4. Graphics: Color coded graphic, laminated plastic displays on doors, schematically showing system being controlled, with protective, clear plastic sheet bonded to entire door. B. Alarm Panels: Indicating light for each alarm point, single horn; Acknowledge switch, and Test switch, mounted in hinged-cover enclosure. PWA INSTRUMENTATION AND CONTROLS FOR HVAC

14 1. Alarm Condition: Indicating light flashes and horn sounds. 2. Acknowledge Switch: Horn silent and indicating light steady. 3. Second Alarm: Horn sounds and indicting light steady. 4. Alarm Condition Cleared: System reset and indicating light extinguished. 5. Contacts in alarm panel allow remote monitoring by independent alarm company. 2.3 APPLICATION SPECIFIC CONTROLLERS (ASC) A. Terminal Equipment Controllers: Controllers shall include all point inputs and outputs necessary to perform the specified control sequences. Analog outputs shall be industry standard signals such as 24V floating control, 3-15, allowing for interface to a variety of modulating actuators. Terminal controllers utilizing proprietary control signals and actuators shall not be acceptable. As an alternative, provide DDC Controllers or other ASCs with industry standard outputs for control of all terminal equipment. 2.4 ANALOG CONTROLLERS A. Step Controllers: 6 stage or 10 stage type, with heavy-duty switching rated to handle loads, UL listed and operated by electric motor. B. Electronic Controllers: Wheatstone bridge amplifier type, in steel enclosure with provision for remote resistance readjustment. Identify adjustments on controllers, including proportional band and authority. 1. Single controllers can be integral with control motor if provided with accessible control readjustment potentiometer. C. Electric, Outdoor-Reset Controllers: Remote bulb or bimetal rod-and-tube type, proportioning action with adjustable throttling range, adjustable set point, scale range minus 10 to plus 70"F, and single- or double-pole contacts. 2.5 TIME CLOCKS A. Solid state, programmable time control with 4 separate programs; 24 hour battery carryover; individual on-off-auto switches for each program; 365 day calendar with 20 programmable holidays; choice of fail-safe operation for each program; and system fault alarm. 2.6 ELECTRONIC SENSORS, DETECTORS AND TRANSMITTERS A. General: Vibration and corrosion resistant for wall, immersion or duct mounting as required. B. Resistance Temperature Detectors: Platinum. 1. Accuracy: Plus or minus 0.2 percent at calibration point. 2. Wire: Twisted, shielded pair cable. 3. Insertion Elements in Ducts: Use where not affected by temperature stratification or where ducts are smaller than 9 sq.ft. (1 sq.m). 4. Averaging elements in Ducts: Use where prone to temperatures stratification or where ducts are larger than 9 sq.ft (1 sq.m), length as required. 5. Insertion Elements for Liquids: Brass socket with minimum insertion length of 2111 inches (64 mm). 6. Outside Air Sensors: Watertight inlet fitting, shielded from direct sunlight. C. Wall Thermostats: For use with unitary, hydronic or electric, heating and cooling units such as unit heaters, cabinet unit heaters, radiant heaters, fan coil units, baseboard finned tube convectors. See Sequence of Operation on Drawings for required functions. As much as practical, covers of each type of thermostat shall match each other and shall match the cover of the VA V space temperature sensors specified elsewhere in this section. 1. Combination Thermostat and Fan Switches: Line voltage thermostat with two-, three- or four-position, pushbutton or lever-operated fan switch. a) Label switches "Fan On-Off', "Fan High-Low-Off', "Fan High-Med-Low-Off'. Provide unit for mounting on two-gang switch. 2. Low-Voltage, On-Off Thermostats: Bimetal-actuated, open contact or bellows-actuated, enclosed, snap switch type, or equivalent solid-state type, with heat anticipator, integral manual on-off-auto selector switch. PWA INSTRUMENTATION AND CONTROLS FOR HVAC

15 a) Equip thermostats, which control electric heating loads directly, with off position on dial wired to break ungrounded conductors. b) Dead Band: Maximum 2"F. D. Remote-Bulb Thermostats: On-off or modulating type, liquid filled to compensate for changes in ambient temperature, with copper capillary and bulb unless otherwise indicated. 1. Bulbs in water lines with separate wells of same material as bulb. 2. Bulbs in air ducts with flanges and shields. 3. Averaging elements: copper tubing with either single- or multiple-unit elements, extended to cover full width of duct or unit, adequately supported. 4. Scale settings and differential settings are clearly visible and adjustable from front of instrument. 5. On-Off Thermostat: With precision snap switches, with electrical ratings required by application. 6. Modulating Thermostats: construct so complete potentiometer coil and wiper assembly is removable for inspection or replacement without disturbing calibration of instrument. E. Immersion thermostat: Remote-bulb or rod-and-tube type, proportioning action with adjustable throttling range and adjustable set point. F. Airstream Thermostats: Two-pipe, fully proportional, single temperature type, with adjustable set point in middle of range and adjustable throttling range, plug-in test fitting or permanent pressure gage, remote bulb, bimetal rod and tube, or averaging element. G. Space-Temperature Sensor (associated with VAV terminal units): DDC resistance temperature sensor; vibration and corrosion resistant; plus or minus 0.2 percent accuracy at calibration point; twisted, shielded pair wire cable. 1. Space Temperature Sensor construction: Manufacturer's standard locking covers. Color shall be off-white. 2. Space Temperature Sensor Accessories include the following: a) Local Setpoint Adjustment: Plus or minus 2 "F from established BTCS setpoint. b) Insulating Bases: For thermostats located on exterior walls. c) Thermostat Guards: Metal wire in unfinished spaces, none in finished spaces. d) Adjusting Key: As required for calibration and cover screws. H. Electric Low-Limit Duct Thermostat: Snap-acting, single-pole, single-throw, manual- or automatic-reset switch that trips if temperature sensed across any 12 inches of bulb length is equal to or below set point. 1. Bulb Length: Minimum 20 feet. 2. Quantity: One thermostat for every 20 sq/ft. of coil surface. I. Electric High-Limit Duct Thermostats: Snap-acting, single-pole, single-throw, manual- or automatic-reset switch that trips if temperature sensed across any 12 inches (300 mm) of bulb length is equal to or above set point. 1. Bulb Length: Minimum 20 feet. 2. Quantity: One thermostat for every 20 sq/ft. of coil surface. I. Duct-Mounted Humidistats: Electric insertion. 2 position tupe with adjustable 2 percent throttling range, 20 to 80 percent operating range, single- or double-pole contacts. 1. Humidity sensors: Bulk polymer sensor element. a) Accuracy: 2 percent full range with linear output. b) Duct and Outside-air Sensors: With element guard and mounting plate, range ofo to 100 percent relative humidity. K. Static-Pressure Transmitter: Nondirectional sensor with suitable range for expected input, and temperature compensated. 1. Accuracy: 2 percent of full scale with repeatability of 0.5%. 2. Output: 4 to 20 rna 3. Building Static Pressure Range: 0 to 0.25 inch wg. 4. Duct Static Pressure Range: 0 to 5 inches wg. PWA INSTRUMENTATION AND CONTROLS FOR HVAC

16 5. Pipe Static Pressure Range: 0 to 175 psia. L. Pressure Transmitters: Direct acting for gas, liquid, or steam service; range suitable for system, proportional output 4 to 20 rna. M. Equipment operation sensors as follows: 1. Status Inputs for Belt Driven Fans: Differential-pressure switch with adjustable range of 0 to 5 inches wg (0 to 1243 Pa). 2. Status Inputs for Direct Drive Fans and Pumps: Current-sensing relay with current transformers, adjustable and set to 175 percent or rated motor current. N. Water-flow Switches: Pressure flow switches of bellows-actuated mercury or snap-acting type, with appropriate scale range and differential adjustment, with stainless steel or bronze paddle. For chilled water applications, provide vaporproof type. 0. Liquid Level Switch: electronic solid state liquid level sensor, which uses conductance of water to complete circuit, and indicate liquid present. Provide digital output device. 2.7 VALVEANDDAMPERACTUATORS A. Manufacturer's: Subject to compliance with requirements, provide damper actuators and largevalve actuators by Belimo Aircontrols, USA, Inc. or approve equal. 1. Large-Valve: As used in this subsection "Large valve" means any control valve 2112" or larger. B. Electronic Operators: Select operator for full shutoff at maximum pump differential pressure. C. Electronic Actuators: Electronic actuators for dampers and large valves shall be of the direct coupled type (over the shaft) enabling it to be mounted directly to the damper or valve shaft without the need for connecting linkage. D. Large valve actuators: Shall be sized to provide the minimum torque required for proper valve close-off for the required application. E. Damper actuators: Shall be sized to provide sufficient torque to operate each damper. Torque required shall be calculated utilizing the following load factors as guidelines (for dampers under 2" WG and less than 1000 FMP): 1. Parallel blade damper with edge seals: 7 inch pounds per square foot. 2. Opposed blade with edge seals: 5 inch pounds per square foot. 3. Parallel blade with no edge seals: 4 inch pounds per square foot. 4. Opposed blade with no edge seals: 3 inch pounds per square foot. F. Coupling: The fastening clamp shall use a V -bolt and V -shaped, toothed cradle to attach to the damper/valve shaft for maximum holding strength. Single bolt or set screw type fasteners are not acceptable. G. Overload Protection: The actuator shall have electronic overload or digital rotation sensing circuitry to prevent damage to the actuator throughout the rotation of the actuator. End switches to deactivate the actuator at the end of rotation of magnetic clutch are not acceptable. H. Proportional Actuators: Proportional actuators shall accept a 2 to 10 VDC or 4 to 20 rna and provide a 2 to 10 VDC position feedback signal. I. Power Requirements: Actuators shall not require more than 10 VA for AC or 8 watts for D application. 1. Damper Actuators: 120 VAC 2. Valve Actuators: 24 VAC or DC. J. Non-spring return actuators: All non-spring return actuators shall have an external manual gear release to aid in installation and allow manual positioning when the actuator is not powered. K. Direction of Rotation Switch: All actuators shall have an external direction or rotation switch to aid I installation and provide proper control response. L. Electrical Connection: Actuators shall be provided with a factory mounted 3-foot electrical cable and conduit fitting to provide easy hook up to an electrical junction box. M. Certification: Actuators shall be UL 873, CSA , and CE certified. Actuators shall be manufactured under ISO 9001 quality certification. PWA INSTRUMENTATION AND CONTROLS FOR HVAC

17 N. Durability & Warranty: Actuator shall be designed for a minimum of 60,000 full stroke cycles at the actuator's rated torque and shall have a 2 year manufacturer's unconditional warranty starting from the date of installation. 0. Actuator Protection: Actuators shall be provided with proper weather, corrosion, or explosionproof type housings as required by the application. Actuators exposed to outside conditions of rain and/or snow shall be installed in a NEMA 3 weather shield. P. Temperature Rating: The operating temperature rating of each actuator shall be -22 "F to 122 "F. 2.8 CONTROL VALVES A. Control Valves: Factory fabricated, of type, body material, and pressure class based on maximum pressure and temperature rating of piping system, unless otherwise indicated. B. Globe Valves: Meet specification provided in Section "Valves". In addition, comply with the following: 1. Sizing: 3-psig (21 kpa) maximum pressure drop at design low rate. 2. Flow Characteristics: Two way valves shall have equal percentage characteristics; three way valves shall have linear characteristics. Operators shall close valves against pump shutoff head. C. Terminal Unit Control Valves 2" (NPS 50) and smaller; bronze body, bronze trim, two- or threeport as indicated, replaceable plugs and seats, union and threaded ends. 1. Rating: Class 125 for service at 125 psig (862 kpa) and 250"F (121 C) operating conditions. 2. Sizing: 3-psig (21 kpa) maximum pressure drop at design flow rate, to close against pump shutoff head. 3. Flow Characteristics: Two way valves shall have equal percentage characteristics; three way valves shall have linear characteristics. 4. Electric motors: Size to operate with sufficient reserve power to provide smooth modulating action or two position action. Permanent Split-Capacitor or Shaded-Pole Type. Gear trains completely oil immersed and sealed. Equip spring-return motors with integral spiral-spring mechanism in housings designed for easy removal for service or adjustment of limit switches, auxiliary switches, or feedback potentiometer. a) Operators (2 position): Synchoronous motor with enclosed tear train, dual return springs, and valve position indicator. Valves spring return to normal position for temperature protection. b) Operators (Modulating): Self contained, linear motor, actuator with 60 second full travel, with transformer and single-throw, double-pole contacts. 2.9 AUTOMATIC CONTROL DAMPERS A. Motorized dampers, without actuator are furnished and installed under Section B. Motorized damper actuators, power, signal, and control wiring, are furnished and installed as the work of the Section POWER SUPPLY AND WIRING A. The work of this section shall include providing all necessary temperature control power wiring except as otherwise described herein. B. Dedicated 20 amp/120 volt Ac circuits are available at panelboards show on Drawings. From that point the party responsible for performance of this Section shall furnish, install, and connect all required power supply to all electric-powered control components furnished under this section. Furnish, install and connect transformers as required to serve lower voltage and/or DC components furnished under this section. Perform field electrical work in complete and strict accordance with Division 16 requirements and the National Electric Code. C. Where current sensing relays are specified or scheduled, the Division 16 installer will provide either a junction box in the power wiring between motor and starter, or space for same within the motor starter. D. The work of this section includes installing the current sensing relay, connecting the power wiring leads to same, and providing all control wiring. PWA INSTRUMENT AT ION AND CONTROLS FOR HVAC

18 E. All power wiring necessary for temperature controls not excluded above is the work of this Section. F. Motor Control Relays: Square D 8501K relays or approved equal. Multipole switching applications at 120 volts; industry-standard wiring and pin anangements; 15 A rated; DPTP; linevoltage throughout; AC or DC signal as compatible with temperature control signal/ Provide where indicated via Equipment Data Schedule on the Drawings ELECTRONIC CABLE A. Single Conductor Coaxial: 50-phm characteristic impedance, cellular polyethylene core, 97 percent coverage, bare copper-braid shield, PVC jacket; complying with MIL-C-17, Type RG- 58U. B. Twin Lead: Bare copper covered steel; 2 conductor parallel; 300-ohm characteristic impedance; polyethylene insulation and web between conductors; cellular polyethylene oval jacket. C. Multiconductor Cable: Quantity of conductors indicated; No. 18 A WG tinned-copper conductors; color coded, low loss PVC insulation; aluminum/mylar shield; No. 22 A WG tinnedcopper drain wire; PVC jacket. PART 3- EECUTION 3.1 EAMINATION A. Verify that conditioned power supply is available to control units and operator workstation. Verify that field end devices, tubing and wiring are installed before proceeding with installation. 3.2 INSTALLATION A. Install equipment as indicated to comply with manufacturer's written instructions. B. Verify location of thermostats and other exposed control sensors with plans and room details before installation. Locate all 54 inches above the floor. 1. Install averaging elements in ducts and plenums in crossing or zigzag pattern. 2. Install guards on thermostats in mechanical and electrical equipment rooms. C. Install labels and nameplates to identify control components according to Section D. Install hydronic instrument wells, valves, and other accessories according to Division 15 Section "Hydronic Piping". E. Install automatic dampers according to Division 15 Section "Duct Accessories." 3.3 ELECRICAL WIRING AND CONNECTIONS A. Install raceways, boxes, and cabinets according to Division 16 Section "Raceways, Boxes and Cabinets." B. Install building wire and cable according to Division 16 Section "Wires and Cables". C. Install signal and communication cable according to Division 16 Section "Wire and Cables" and cable manufacturer's written instructions. 1. Conceal cable above ceilings and within funed walls, except in mechanical rooms and other unfinished areas where other conduit and piping are exposed. a) Bundle and harness multiconductor instrument cable in place of single cables where a number of cables follow a common path. 2. All 120-Volt wiring shall be installed in raceway regardless of location or height. 3. All 24-Volt power, signal and control wiring located above ceilings shall be installed in raceway or shall be plenum-rated cable meeting a 25/50 flame/smoke spread rating conforming to UL All power, signal and control wiring located below ceilings, below the ceiling plane, or within walls shall be installed in raceway. 5. All power, signal and control wiring in mechanical rooms and other rooms without finished ceilings shall be installed in raceway regardless of height. 6. Fasten flexible conductors, bridging cabinets and doors, neatly along hinge side; protect against abrasion. Tie and support conductors neatly. PWA INSTRUMENTATION AND CONTROLS FOR HVAC

19 7. Number-code or color-code conductors, except local individual room controls, for future identification and servicing of control system. D. Connect electrical components to wiring systems and to ground as indicated and instructed by manufacturer. Tighten connectors and terminals, including screws and bolts, according to equipment manufacturer's published torque-tightening values for equipment connectors. Where manufacturer's torquing requirements are not indicated, tighten connectors and terminals according to tightening requirements specified in UL 486A. E. Connect manual reset limit controls independent of manual control switch positions. F. Connect HAND-OFF-AUTO selector switches to override automatic interlock controls when switch is in HAND position. 3.4 FIELD QUALITY CONTROL A. Manufacturer's Field Services: Engage a factory-authorized representative to inspect fieldassembled components and equipment installation, including piping and electrical connections. Report results in writing. 1. Operational Test: After electrical circuitry has been energized, start units to confirm proper unit operation. Remove malfunctioning units, replace with new units, and retest. 2. Test and adjust controls and safeties. Replace damaged and malfunctioning controls and equipment, and retest. 3. Calibration test electronic controllers by disconnecting input sensors and stimulating operation with compatible signal generator. B. Engage a factory-authorized service representative to perform startup service. C. Replace damaged or malfunctioning controls and equipment. D. Start, test and adjust control systems. E. Demonstrate compliance with requirements, including calibration and testing and control sequences. 3.5 DEMONSTRATION A. Manufacturer's Field Services: Provide the services of a factory-authorized representative to demonstrate and train Owner's maintenance personnel as specified below. 1. Train Owner's maintenance personnel on procedures and schedules related to startup and shutdown, troubleshooting, servicing and preventive maintenance. 2. Schedule training with Owner with at least 7 days notice. 3. Provide operator training on data display, alarm and status descriptors, requesting data, execution of commands, and request of logs. Include a minimum of 40 hours' dedicated time on-site. 3.6 ON-SITE ASSISTANCE A. Occupancy Adjustments: Within one year of date of Substantial Completion, provide up to three Project site visits, when requested by Owner, to adjust and calibrate components and to assist Owner's personnel in making program changes and in adjusting sensors and controls to suit actual conditions. 3.7 CONTROL SEQUENCES Variable Air Volume- RTU #1 & #2 Run Conditions - Requested: The unit shall run whenever: e e Any zone is occupied. OR a definable number of unoccupied zones need heating or cooling. Emergency Shutdown: The unit shall shut down and generate an alarm upon receiving an emergency shutdown signal. PWA INSTRUMENTATION AND CONTROLS FOR HVAC

20 High Static Shutdown: The unit shall shut down and generate an alarm upon receiving an high static shutdown signal. Return Air Smoke Detection: The unit shall shut down and generate an alarm upon receiving a return air smoke detector status. AHU Optimal Start: The unit shall start prior to scheduled occupancy based on the time necessary for the zones to reach their occupied setpoints. The start time shall automatically adjust based on changes in outside air temperature and zone temperatures. Supply Fan: The supply fan shall run anytime the unit is commanded to run, unless shutdown on safeties. To prevent short cycling, the supply fan shall have a user definable (adj.) minimum runtime. Alarms shall be provided as follows: e Supply Fan Failure: Commanded on, but the status is off. Supply Fan in Hand: Commanded off, but the status is on. Supply Fan Runtime Exceeded: Status runtime exceeds a user definable limit (adj.). Supply Air Duct Static Pressure Control: The controller shall measure duct static pressure and shall modulate the supply fan VFD speed to maintain a duct static pressure setpoint of 1.5in H 2 0 (adj.). The supply fan VFD speed shall not drop below 30% (adj.). Alarms shall be provided as follows: High Supply Air Static Pressure: If the supply air static pressure is 25% (adj.) greater than setpoint. Low Supply Air Static Pressure: If the supply air static pressure is 25% (adj.) less than setpoint. Supply Fan VFD Fault. Building Static Pressure Control: The controller shall measure building static pressure and modulate the Outdoor Air Damper to maintain a building static pressure setpoint o(0.05in H20 (adj.). The Outdoor Air Damper shall not drop below 5% open (adj.). Alarms shall be provided as follows: High Building Static Pressure: If the building air static pressure is 25% (adj.) greater than setpoint. Low Building Static Pressure: If the building air static pressure is 25% (adj.) less than setpoint. Supply Air Temperature Setpoint - Optimized: The controller shall monitor the supply air temperature and shall maintain a supply air temperature setpoint reset based on zone cooling and heating requirements PWA INSTRUMENTATION AND CONTROLS FOR HV AC

21 The supply air temperature setpoint shall be reset for cooling based on zone cooling requirements as follows: "' "' "' The initial supply air temperature setpoint shall be 55 F (adj.). As cooling demand increases, the setpoint shall incrementally reset down to a minimum of 53 F (adj.). As cooling demand decreases, the setpoint shall incrementally reset up to a maximum of 72 F (adj.). If more zones need heating than cooling, then the supply air temperature setpoint shall be reset for heating as follows: "' The initial supply air temperature setpoint shall be 82 F (adj.). As heating demand increases, the setpoint shall incrementally reset up to a maximum of 85 F (adj.). "' As heating demand decreases, the setpoint shall incrementally reset down to a minimum of 72 F (adj.). Cooling Stages: The controller shall measure the supply air temperature and stage the cooling to maintain its cooling setpoint. To prevent short cycling, there shall be a user definable (adj.) delay between stages, and each stage shall have a user definable (adj.) minimum runtime. The cooling shall be enabled whenever: Outside air temperature is greater than 60 F (adj.). "' AND the economizer (if present) is disabled or fully open. AND the supply fan status is on. AND the heating (if present) is not active. Alarms shall be provided as follows: "' High Supply Air Temp: If the supply air temperature is sop (adj.) greater than setpoint. Gas Heating Stages: The controller shall measure the supply air temperature and stage the heating to maintain its heating setpoint. To prevent short cycling, there shall be a user definable (adj.) delay between stages, and each stage shall have a user definable (adj.) minimum runtime. The heating shall be enabled whenever: Outside air temperature is less than 65 F (adj.). AND the supply fan status is on. "' AND the cooling (if present) is not active. The heating stages shall run for freeze protection whenever: PWA INSTRUMENTATION AND CONTROLS FOR HVAC

22 Supply air temperature drops from 40 F to 35 F (adj.). AND the supply fan status is on. Alarms shall be provided as follows: Low Supply Air Temp: If the supply air temperature is sop (adj.) less than setpoint. Economizer: The controller shall measure the mixed air temperature and modulate the economizer dampers in sequence to maintain a setpoint 2 F (adj.) less than the supply air temperature setpoint. The outside air dampers shall maintain a minimum adjustable position of 20% (adj.) open whenever occupied. The economizer shall be enabled whenever: Outside air temperature is less than 65 F (adj.). AND the outside air temperature is less than the return air temperature. ~ AND the supply fan status is on. The economizer shall close whenever: ~ Mixed air temperature drops from 40 F to 35 F (adj.). OR the freezestat (if present) is on. e OR on loss of supply fan status. The outside and exhaust air dampers shall close and the return air damper shall open when the unit is off. If Optimal Start Up is available the mixed air damper shall operate as described in the occupied mode except that the outside air damper shall modulate to fully closed. Minimum Outside Air Ventilation- Carbon Dioxide (C02) Control: When in the occupied mode, the controller shall measure the return air C02 levels and modulate the outside air dampers open on rising C02 concentrations, overriding normal damper operation to maintain a C02 setpoint of 750 ppm (adj.). Final Filter Differential Pressure Monitor: The controller shall monitor the differential pressure across the final filter. Alarms shall be provided as follows: ~ Final Filter Change Required: Final filter differential pressure exceeds a user definable limit (adj.). Mixed Air Temperature: The controller shall monitor the mixed air temperature and use as required for economizer control (if present) or preheating control (if present). Alarms shall be provided as follows: ~ High Mixed Air Temp: If the mixed air temperature is greater than 90 F (adj.). PWA INSTRUMENT AT ION AND CONTROLS FOR HVAC

23 <~> Low Mixed Air Temp: If the mixed air temperature is less than 45 F (adj.). Return Air Carbon Dioxide (C02) Concentration Monitoring: The controller shall measure the return air C02 levels. Alarms shall be provided as follows: High Return Air Carbon Dioxide Concentration: If the return air C02 concentration is greater than loooppm (adj.) when in the unit is running. Return Air Temperature: The controller shall monitor the return air temperature and use as required for setpoint control or economizer control (if present). Alarms shall be provided as follows: High Return Air Temp: If the return air temperature is greater than 90 F (adj.). Low Return Air Temp: If the return air temperature is less than 45 F (adj.). Supply Air Temperature: The controller shall monitor the supply air temperature. Alarms shall be provided as follows: High Supply Air Temp: If the supply air temperature is greater than l20 F (adj.). Low Supply Air Temp: If the supply air temperature is less than 45 F (adj.). Hardware Points Software Points Point Name AI AO B:::l~~l~ ~ I ~ hie Supply Air Static Pressure Building Static Pressure Final Filter Differential Pressure Mixed Air Temp Return Air Carbon Dioxide PPM Return Air Temp Supply Air Temp Supply Fan VFD Speed Mixed Air Dampers High Static Shutdown Return Air Smoke Detector Supply Fan VFD Fault Supply Fan Status Supply Fan Start/Stop Cooling Stage I Cooling Stage 2 Cooling Stage 3 Cooling Stage 4 PWA INSTRUMENTATION AND CONTROLS FOR HVAC

24 Point Name Stage 1 Heating Stage 2 Heating Stage 3 Heating Stage 4 Supply Air Static Pressure Setpoint Building Static Pressure Setpoint Supply Air Temp Setpoint Economizer Mixed Air Temp Setpoint RA Carbon Dioxide PPM Setpoint Emergency Shutdown High Supply Air Static Pressure Supply Air Static Pressure Supply Fan Failure Supply Fan in Hand Supply Fan Runtime Exceeded High Building Static Pressure Low Building Static Pressure High Supply Air Temp Compressor Runtime Exceeded Low Supply Air Temp Final Filter Change Required Mixed Air Temp Mixed Air Temp High Return Air Carbon Dioxide Concentration High Return Air Temp Low Return Air Temp High Supply Air Temp Low Supply Air Temp PWA INSTRUMENTATION AND CONTROLS FOR HVAC

25 VAV-RTU#3 Run Conditions - Requested: The unit shall run whenever: Any zone is occupied. OR a definable number of unoccupied zones need heating or cooling. Emergency Shutdown: The unit shall shut down and generate an alarm upon receiving an emergency shutdown signal. High Static Shutdown: The unit shall shut down and generate an alarm upon receiving an high static shutdown signal. Return Air Smoke Detection: The unit shall shut down and generate an alarm upon receiving a return air smoke detector status. AHU Optimal Start: The unit shall start prior to scheduled occupancy based on the time necessary for the zones to reach their occupied setpoints. The start time shall automatically adjust based on changes in outside air temperature and zone temperatures. Supply Fan: The supply fan shall run anytime the unit is commanded to run, unless shutdown on safeties. To prevent short cycling, the supply fan shall have a user definable (adj.) minimum runtime. Alarms shall be provided as follows: Supply Fan Failure: Commanded on, but the status is off. Supply Fan in Hand: Commanded off, but the status is on. Supply Fan Runtime Exceeded: Status runtime exceeds a user definable limit (adj.). Building Static Pressure Control: The controller shall measure building static pressure and modulate the Outdoor Air Damper to maintain a building static pressure setpoint o(0.05in H?O (adj.). The Outdoor Air Damper shall not drop below 5% open (adj.). Alarms shall be provided as follows: High Building Static Pressure: If the building air static pressure is 25% (adj.) greater than setpoint. Low Building Static Pressure: If the building air static pressure is 25% (adj.) less than setpoint. Supply Air Temperature Setpoint - Optimized: The controller shall monitor the supply air temperature and shall maintain a supply air temperature setpoint reset based on zone cooling and heating requirements The supply air temperature setpoint shall be reset for cooling based on room temperature cooling requirements as follows: PWA INSTRUMENTATION AND CONTROLS FOR HV AC

26 011 The initial supply air temperature setpoint shall be 55 F (adj.). 011 As cooling demand increases, the setpoint shall incrementally reset down to a minimum of 53 F (adj.). 011 As cooling demand decreases, the setpoint shall incrementally reset up to a maximum of 72 F (adj.). If zone needs heating, then the supply air temperature setpoint shall be reset for heating as follows: 011 The initial supply air temperature setpoint shall be 82 F (adj.). 011 As heating demand increases, the setpoint shall incrementally reset up to a maximum of 85 F (adj.). o As heating demand decreases, the setpoint shall incrementally reset down to a minimum of 72 F (adj.). Cooling Stages: The controller shall measure the supply air temperature and stage the cooling to maintain its cooling setpoint. To prevent short cycling, there shall be a user definable (adj.) delay between stages, and each stage shall have a user definable (adj.) minimum runtime. The cooling shall be enabled whenever: 011 Outside air temperature is greater than 60 F (adj.). AND the economizer (if present) is disabled or fully open. o AND the supply fan status is on. 011 AND the heating (if present) is not active. Alarms shall be provided as follows: High Supply Air Temp: If the supply air temperature is sop (adj.) greater than setpoint. Gas Heating Stages: The controller shall measure the supply air temperature and stage the heating to maintain its heating setpoint. To prevent short cycling, there shall be a user definable (adj.) delay between stages, and each stage shall have a user definable (adj.) minimum runtime. The heating shall be enabled whenever: Ell Outside air temperature is less than 65 F (adj.)... AND the supply fan status is on... AND the cooling (if present) is not active. The heating stages shall run for freeze protection whenever: o Supply air temperature drops from 40 F to 35 F (adj.). AND the supply fan status is on. PWA INSTRUMENTATION AND CONTROLS FOR HVAC

27 Alarms shall be provided as follows: 011 Low Supply Air Temp: If the supply air temperature is sop (adj.) less than setpoint. Economizer: The controller shall measure the mixed air temperature and modulate the economizer dampers in sequence to maintain a setpoint 2 F (adj.) less than the supply air temperature setpoint. The outside air dampers shall maintain a minimum adjustable position of 20% (adj.) open whenever occupied. The economizer shall be enabled whenever: 011 Outside air temperature is less than 65 F (adj.). 011 AND the outside air temperature is less than the return air temperature. 011 AND the supply fan status is on. The economizer shall close whenever: 011 Mixed air temperature drops from 40 F to 35 F (adj.). 011 OR the freezestat (if present) is on. 011 OR on loss of supply fan status. The outside and exhaust air dampers shall close and the return air damper shall open when the unit is off. If Optimal Start Up is available the mixed air damper shall operate as described in the occupied mode except that the outside air damper shall modulate to fully closed. Minimum Outside Air Ventilation - Carbon Dioxide (C02) Control: When in the occupied mode, the controller shall measure the return air C02 levels and modulate the outside air dampers open on rising C02 concentrations, overriding normal damper operation to maintain a C02 setpoint of 750 ppm (adj.). Final Filter Differential Pressure Monitor: The controller shall monitor the differential pressure across the final filter. Alarms shall be provided as follows: 011 Final Filter Change Required: Final filter differential pressure exceeds a user definable limit (adj.). Mixed Air Temperature: The controller shall monitor the mixed air temperature and use as required for economizer control (if present) or preheating control (if present). Alarms shall be provided as follows: 011 High Mixed Air Temp: If the mixed air temperature is greater than 90 F (adj.). 011 Low Mixed Air Temp: If the mixed air temperature is less than 45 F (adj.). Return Air Carbon Dioxide (C02) Concentration Monitoring: The controller shall measure the return air C02 levels. PWA INSTRUMENTATION AND CONTROLS FOR HVAC

28 Alarms shall be provided as follows: "' High Return Air Carbon Dioxide Concentration: If the return air C02 concentration is greater than loooppm (adj.) when in the unit is running. Return Air Temperature: The controller shall monitor the return air temperature and use as required for setpoint control or economizer control (if present). Alarms shall be provided as follows: "' High Return Air Temp: If the return air temperature is greater than 90 F (adj.). Low Return Air Temp: If the return air temperature is less than 45 F (adj.). Supply Air Temperature: The controller shall monitor the supply air temperature. Alarms shall be provided as follows: "' High Supply Air Temp: If the supply air temperature is greater than l20 F (adj.). Low Supply Air Temp: If the supply air temperature is less than 45 F (adj.). Hardware Points Software Points Point Name AI AO BI BO AV BV Sched Trend Alarm Supply Air Static Pressure Building Static Pressure Show On Graphic Final Filter Differential Pressure Mixed Air Temp Return Air Carbon Dioxide PPM Return Air Temp Supply Air Temp Supply Fan VFD Speed Return Fan VFD Speed Mixed Air Dampers High Static Shutdown Return Air Smoke Detector Supply Fan VFD Fault Supply Fan Status Return Fan VFD Fault Return Fan Status Supply Fan Start/Stop Return Fan Start/Stop Cooling Stage I Cooling Stage 2 Cooling Stage 3 Cooling Stage 4 PW A INSTRUMENTATION AND CONTROLS FOR HV AC

29 Point Name Heating Stage 2 Heating Stage 3 Heating Stage 4 Supply Air Static Pressure Setpoint Static Pressure Setpoint Supply Air Temp Setpoint Economizer Mixed Air Temp Setpoint RA Carbon Dioxide PPM Setpoint Emergency Shutdown High Supply Air Static Pressure Low Supply Air Static Pressure Supply Fan Failure Supply Fan in Hand Supply Fan Runtime Exceeded Building Static Pressure Fan in Hand Return Fan Runtime Exceeded High Supply Air Temp Compressor Runtime Exceeded Low Supply Air Temp Final Filter Change Required High Mixed Air Temp Low Mixed Air Temp High Return Air Carbon Dioxide Concentration High Return Air Temp Low Return Air Temp High Supply Air Temp PWA INSTRUMENTATION AND CONTROLS FOR HVAC

30 ENERGY RECOVERY UNITS - Duct Static Run Conditions - Interlocked: The unit(s) ERU-1 shall be interlocked to run based on schedule unless shutdown on safeties. Control- Duct Static Pressure: The exhaust fan shall run when commanded on. The controller shall measure exhaust duct static pressure and modulate the exhaust fan VFD speed to maintain a static pressure setpoint of -0.5in H 2 0 (adj.) compared to space pressure. The exhaust fan VFD speed shall not drop below 20% (adj.). Alarms shall be provided as follows: High duct Static Pressure: If the building static pressure is 25% (adj.) greater than setpoint. Low duct Static Pressure: If the building static pressure is 25% (adj.) less than setpoint. Exhaust Fan VFD Fault. Exhaust Air and Intake Air Dampers: The exhaust air and intake air dampers shall open anytime the unit runs and shall close anytime the unit stops. The dampers shall close 30 sec (adj.) after the fan stops. Filter Differential Pressure Monitor: The controller shall monitor the differential pressure across the filter. Alarms shall be provided as follows: Filter Change Required: Filter differential pressure exceeds a user definable limit (adj.). Damper Status: The fan shall be enabled after the damper status has proven. Alarms shall be provided as follows: Damper Failure: Commanded open, but the status is closed. Damper in Hand: Commanded closed, but the status is open. Fan Status: The controller shall monitor the fan status. Alarms shall be provided as follows: Fan Failure: Commanded on, but the status is off. Fan in Hand: Commanded off, but the status is on. Fan Runtime Exceeded: Fan status runtime exceeds a user definable limit (adj.). PWA INSTRUMENTATION AND CONTROLS FOR HV AC

31 Hardware Points Point Name AI AO Duct Static Pressure Filter Differential Pressure Fan VFD Speed Fan VFD Fault Exhaust Air Damper Status Intake Air Damper Status Fan Status Fan Start/Stop Exhaust Air Damper Intake Air Damper Building Static Pressure Setpoint High Building Static Pressure I Low Building Static Pressure Filter Change Required Exhaust Air Damper Failure Fan Failure Fan in Hand Fan Runtime Exceeded Software Points BI BO AV BV Sched Trend Alarm Show On Graphic PWA INSTRUMENTATION AND CONTROLS FOR HVAC

32 Outdoor Lighting Run Conditions: The lighting output shall turn on and off based upon the local sunrise and sunset times. The transitions shall be configurable as follows: Output turns OFF (adj) at 30 minutes (adj) BEFORE (adj) sunrise. Output turns ON (adj) at 30 minutes (adj) AFTER (adj) sunset. Hardware Points BO A V Software Points BV Sched Trend Alarm Show On Graphic Total Hardware ( 1 ) Total Software ( 1 ) PWA INSTRUMENTATION AND CONTROLS FOR HVAC

33 Exhaust Fan - Elevator Equipment Room Run Conditions - Continuous: The unit shall be continuously enabled to maintain a zone temperature cooling setpoint of 90 F (adj.). Alarms shall be provided as follows: High Zone Temp: If the zone temperature is greater than the cooling setpoint by a user definable amount (adj.). Fan: The fan shall run anytime the zone temperature rises above cooling setpoint, unless shutdown on safeties. Fan Status: The controller shall monitor the fan status. Alarms shall be provided as follows: Fan Failure: Commanded on, but the status is off. Fan in Hand: Commanded off, but the status is on. Fan Runtime Exceeded: Fan status runtime exceeds a user definable limit (adj.). Point Name ZoneTemp AI x Fan Status Fan Start/Stop Cooling Setpoint High Zone Temp Fan Failure Fan in Hand Fan Runtime Exceeded Total Hardware ( 3 ) Total Software ( 9 ) VAVBox Run Conditions - Scheduled: The unit shall run according to a user definable time schedule in the following modes: Occupied Mode: The unit shall maintain o o A 7 4 F (adj.) cooling setpoint A 70 F (adj.) heating setpoint. Unoccupied Mode (night setback): The unit shall maintain PWA INSTRUMENTATION AND CONTROLS FOR HVAC

34 o o A 85 F (adj.) cooling setpoint. A 55 F (adj.) heating setpoint. Alarms shall be provided as follows: High Zone Temp: If the zone temperature is greater than the cooling setpoint by a user definable amount (adj.). Low Zone Temp: If the zone temperature is less than the heating setpoint by a user definable amount (adj.). Minimum Ventilation on Carbon Dioxide (C02) Concentration: When in the occupied mode, the controller shall measure the zone C02 levels and modulate the zone damper open on rising C02 concentrations, overriding normal damper operation to maintain a C02 setpoint of not more than 750 ppm (adj.). Alarms shall be provided as follows: High Zone Carbon Dioxide Concentration: If the zone C02 concentration is greater than 1000 ppm (adj.). Zone Setpoint Adjust: The occupant shall be able to adjust the zone temperature heating and cooling setpoints at the zone sensor. Zone Optimal Start: The unit shall use an optimal start algorithm for morning start-up. This algorithm shall minimize the unoccupied warm-up or cool-down period while still achieving comfort conditions by the start of scheduled occupied period. Zone Unoccupied Override: A timed local override control shall allow an occupant to override the schedule and place the unit into an occupied mode for an adjustable period of time. At the expiration of this time, control of the unit shall automatically return to the schedule. Reversing Variable Volume Terminal Unit - Flow Control: The unit shall maintain zone setpoints by controlling the airflow through one of the following: Occupied: When zone temperature is greater than its cooling setpoint, the zone damper shall modulate between the minimum occupied airflow (adj.) and the maximum cooling airflow (adj.) until the zone is satisfied. e When the zone temperature is between the cooling setpoint and the heating setpoint, the zone damper shall maintain the minimum required zone ventilation (adj.). When zone temperature is less than its heating setpoint, the controller shall enable heating to maintain the zone temperature at its heating setpoint. Additionally, if warm air is available from the AHU, the zone damper shall modulate between the minimum occupied airflow (adj.) and the maximum heating airflow (adj.) until the zone is satisfied. Unoccupied: PWA INSTRUMENTATION AND CONTROLS FOR HVAC

35 "' "' When the zone is unoccupied the zone damper shall control to its minimum unoccupied airflow (adj.). When the zone temperature is greater than its cooling setpoint, the zone damper shall modulate between the minimum unoccupied airflow (adj.) and the maximum cooling airflow (adj.) until the zone is satisfied. "' When zone temperature is less than its unoccupied heating setpoint, the controller shall enable heating to maintain the zone temperature at the setpoint. Additionally, if warm air is available from the AHU, the zone damper shall modulate between the minimum unoccupied airflow (adj.) and the auxiliary heating airflow (adj.) until the zone is satisfied. Reheating Coil Valve: The controller shall measure the zone temperature and modulate the reheating coil valve open on dropping temperature to maintain its heating setpoint. Discharge Air Temperature: The controller shall monitor the discharge air temperature. Alarms shall be provided as follows: "' "' High Discharge Air Temp: If the discharge air temperature is greater than l20 F (adj.). Low Discharge Air Temp: If the discharge air temperature is less than 40 F (adj.). Hardware Points Software Points Point Name AI AO BI BO AV BV Sched Trend Alarm Show On Graphic Zone Temp Zone Carbon Dioxide PPM Zone Setpoint Adjust Airflow Discharge Air Temp Zone Damper Reheating Valve Zone Override Zone Carbon Dioxide PPM Setpoint Airflow Setpoint Heating Mode Schedule Heating Setpoint Cooling Setpoint High Zone Temp Low Zone Temp High Zone Carbon Dioxide Concentration High Discharge Air Temp Low Discharge Air Temp Total Hardware ( 8 ) Total Software ( 20 ) PWA INSTRUMENTATION AND CONTROLS FOR HV AC

36 Fan Terminal Unit Run Conditions - Scheduled: The unit shall run according to a user definable time schedule in the following modes: Occupied Mode: The unit shall maintain o o A 74 F (adj.) cooling setpoint A 70 F (adj.) heating setpoint. Unoccupied Mode (night setback): The unit shall maintain o o A 85 F (adj.) cooling setpoint. A 55 F (adj.) heating setpoint. Alarms shall be provided as follows: High Zone Temp: If the zone temperature is greater than the cooling setpoint by a user definable amount (adj.). Low Zone Temp: If the zone temperature is less than the heating setpoint by a user definable amount (adj.). Minimum Ventilation on Carbon Dioxide (C02) Concentration: When in the occupied mode, the controller shall measure the zone C02 levels and modulate the zone damper open on rising C02 concentrations, overriding normal damper operation to maintain a C02 setpoint of not more than 750 ppm (adj.). Alarms shall be provided as follows: High Zone Carbon Dioxide Concentration: If the zone C02 concentration is greater than 1000 ppm (adj.). Zone Setpoint Adjust: The occupant shall be able to adjust the zone temperature heating and cooling setpoints at the zone sensor. Zone Optimal Start: The unit shall use an optimal start algorithm for morning start-up. This algorithm shall minimize the unoccupied warm-up or cool-down period while still achieving comfort conditions by the start of scheduled occupied period. Zone Unoccupied Override: A timed local override control shall allow an occupant to override the schedule and place the unit into an occupied mode for an adjustable period of time. At the expiration of this time, control of the unit shall automatically return to the schedule. Reversing Variable Volume Terminal Unit - Flow Control: The unit shall maintain zone setpoints by controlling the airflow through one of the following: Occupied: PWA INSTRUMENTATION AND CONTROLS FOR HVAC

37 "' "' "' When zone temperature is greater than its cooling setpoint, the zone damper shall modulate between the minimum occupied airflow (adj.) and the maximum cooling airflow (adj.) until the zone is satisfied. When the zone temperature is between the cooling setpoint and the heating setpoint, the zone damper shall maintain the minimum required zone ventilation (adj.). When zone temperature is less than its heating setpoint, the controller shall enable heating to maintain the zone temperature at its heating setpoint. Additionally, if warm air is available from the AHU, the zone damper shall modulate between the minimum occupied airflow (adj.) and the maximum heating airflow (adj.) until the zone is satisfied. Unoccupied: "' "' When the zone is unoccupied the zone damper shall control to its minimum unoccupied airflow (adj.). When the zone temperature is greater than its cooling setpoint, the zone damper shall modulate between the minimum unoccupied airflow (adj.) and the maximum cooling airflow (adj.) until the zone is satisfied. "' When zone temperature is less than its unoccupied heating setpoint, the controller shall enable heating to maintain the zone temperature at the setpoint. Additionally, if warm air is available from the AHU, the zone damper shall modulate between the minimum unoccupied airflow (adj.) and the auxiliary heating airflow (adj.) until the zone is satisfied. Fan Control - Parallel: The fan shall run whenever the zone controller calls for heat. The fan shall run for a minimum user definable time (adj.). If the AHU is not running, the zone damper will close completely to prevent the unit fan from blowing air back into the supply duct. Reheating Coil Valve: The controller shall measure the zone temperature and modulate the reheating coil valve open on dropping temperature to maintain its heating setpoint. Reheating - High Discharge Air Temperature Limit: The controller shall measure the discharge air temperature and limit reheating if the discharge air temperature is more than l5 F (adj.) above the zone temperature. Discharge Air Temperature: The controller shall monitor the discharge air temperature. Alarms shall be provided as follows: High Discharge Air Temp: If the discharge air temperature is greater than 120 F (adj.). Low Discharge Air Temp: If the discharge air temperature is less than 40 F (adj.). Fan Status: The controller shall monitor the fan status. Alarms shall be provided as follows: Fan Failure: Commanded on, but the status is off. Fan in Hand: Commanded off, but the status is on. PWA INSTRUMENTATION AND CONTROLS FOR HVAC

38 "' Fan Runtime Exceeded: Fan status runtime exceeds a user definable limit (adj.). Point Name Zone Temp Zone Carbon Dioxide PPM Zone Setpoint Adjust Airflow Discharge Air Temp Zone Damper IR Valve I Zone Override Fan Status!Fan Start/Stop Zone Carbon Dioxide PPM Setpoint Airflow Setpoint Heating Mode Schedule Heating Setpoint Cooling Setpoint High Zone Temp Low Zone Temp High Zone Carbon Dioxide f'onr.,ntration High Discharge Air Temp Low Discharge Air Temp!Fan Failure!Fan in Hand!Fan Runtime Exceeded Hardware Points Software Points AI AO BI BO 1 AV BV Sched Trend Alarm Show On Graphic Total Hardware ( 10) Total Software ( 24 ) END OF SECTION PWA INSTRUMENTATION AND CONTROLS FOR HVAC

39 SECTION BASIC PIPING MATERIALS AND METHODS PART 1 GENERAL 1.01 RELATED DOCUMENTS A. Drawings and General Requirements of Contract, including General Conditions and Special Conditions in Division 1 Specification sections, apply to work of this section SUMMARY A. This Section specifies piping materials, valves, piping accessories and installation methods common to more than one section of Division 15 and includes joining materials, piping specialties, valves, and basic piping installation instructions. Other Sections of this Division may pertain to special requirements of specific piping systems QUALITY ASSURANCE A. Welder's Qualifications: All welders shall be qualified in accordance with ASME Boiler and Pressure Vessel Code, Section I, Welding and Brazing Qualifications. B. Welding procedures and testing shall comply with ANSI Standard B Standard Code for Pressure Piping, Power Piping, and The American Welding Society, Welding Handbook. C. Soldering and Brazing procedures shall conform to ANSI B9.1 Standard Safety Code for Mechanical Refrigeration. D. Manufacturers Standardization Society of the Valve and Fittings Industry (MSS) Compliance: Comply with the various MSS Standard Practices referenced DELIVERY, STORAGE, AND HANDLING A. Protect stored pipes and tubes. Elevate above grade and enclose with durable, waterproof wrapping where pipe may be subject to corrosion. Seal ends to protect from physical damage, dirt, debris, and moisture. B. Protect flanges, fittings, valves, and specialties from moisture and dirt by inside storage and enclosure, or by packaging with durable, waterproof wrapping. Protect valves from weather and support valves off the ground or pavement. PART 2 PRODUCTS 2.01 VALVES A. Operators: Provide the following special operator features: 1. Handwheels, fastened to valve stem, for valves other than quarter turn. 2. Lever handles, on quarter-turn valves 4-inch and smaller. B. Extended Stems: Where insulation is indicated or specified, provide extended stems arranged to receive insulation. C. All valves will be tagged with an engraved brass or plastic tag describing type of service and area controlled by the valve. Provide valve list for all valves located in the mechanical rooms JOINING MATERIALS A. Welding Materials: Comply with Section II, Part C, ASME Boiler and Pressure Vessel Code for welding materials appropriate for the wall thickness and chemical analysis of the pipe being welded. B. Brazing Materials: Comply with SFA-5.8, Section II, ASME Boiler and Pressure Vessel Code for brazing filler metal materials appropriate for the materials being joined. C. Soldering Materials: Refer to individual piping system specifications for solder appropriate for each respective system. D. Gaskets for Flanged Joints: Gasket material shall be full-faced for cast iron flanges and raisedface for steel flanges. Referenced gasket "Garlock" Model All flange gaskets shall be 1/8 PWA i BASIC PIPING MATERIALS AND METHODS

40 inch thick. 1. Material Properties a. Color: Black b. Composition: Aramid fibers with a nitrile binder. c. Fluid Service: Water, aliphatic hydrocarbons, oils and gasoline. d. Temperature (T): 1) Minimum -100 degrees F. 2) Continuous: +400 degrees F. 3) Maximum: degrees F. e. Pressure (P): 1000 psig. f. P x T (max) for 1/8 inch thick: 250, Physical Properties a. ASTM F36, Compressibility range 7-17 %. b. ASTM F36, Recovery 50%. c. ASTM F36, Creep relaxation 25%. d. ASTM F152, Tensile across grain 1500 psi. e. ASTM F1315, Density 105lbs./cu.ft. f. ASTM F433, Thermal conductivity Btu. in./hr. ft.sq. degree F. g. ASTM F104, Line Call Out: F712102A9B5E33K5Ll01M PIPING SPECIALTIES A. Escutcheons: Chrome-plated, stamped steel, hinged, split-ring escutcheon, with set screw. Inside diameter shall closely fit pipe outside diameter, or outside of pipe insulation where pipe is insulated. Outside diameter shall completely cover the opening in floors, walls, or ceilings. B. Dielectric Couplings: Provide dielectric couplings with appropriate end connections for the pipe materials in which installed (screwed, soldered, or flanged), which effectively isolate dissimilar metals, prevent galvanic action, and stop corrosion. PART 3 EECUTION 3.01 PREPARATION A. Ream ends of pipes and tubes, and remove burrs. Bevel plain ends of steel pipe. B. Remove scale, slag, dirt, and debris for both inside and outside of piping and fittings before assembly. C. Examine valve interior through the end ports for cleanliness, freedom from foreign matter, and corrosion. Remove special packing materials, such as blocks used to prevent disc movement during shipping and handling. D. Actuate valve through an open-close and close-open cycle. Examine functionally significant features, such as guides and seats made accessible by such actuation. Following examination, return the valve closure member to the shipping position. E. Examine threads on both the valve and the mating pipe for form (i.e., out-of-round or local indentation) and cleanliness. F. Examine mating flange faces for conditions that might cause leakage. Check bolting for proper size, length, and material. Check gasket material for proper size, material composition suitable for service, and freedom from defects and damage. G. Prior to valve installation, examine the piping for cleanliness, freedom from foreign materials, and proper alignment. H. Replace defective valves with new valves INSTALLATIONS A. General Locations and Arrangements: Drawings (plans, schematics, and diagrams) indicate the general location and arrangement of the piping systems. Location and arrangement of piping layout take into consideration pipe sizing and friction loss, expansion, pump sizing, and other design considerations. So far as practical, install piping as indicated. Refer to individual system PWA BASIC PIPING MATERIALS AND METHODS

41 specifications for requirements for coordination drawing submittals VALVEINSTALLATIONS A. Where valves will be exposed to heat during installation (soldering and brazing) the valve shall be protected form damage due to heat per manufacturer's recommendations. B. Locate valves for easy access and provide separate support where necessary FITTINGS AND SPECIALTIES A. Use fittings for all changes in direction and all branch connections. B. Remake leaking joints using new materials. C. Install Flanges in piping 2-1/2" and larger, where indicated, adjacent to each valve, strainer or other flanged item and at the final connection to each piece of equipment. D. Install dielectric coupling to connect piping materials of dissimilar metals in piping systems ADJUSTING AND CLEANING A. Cleaning: Clean mill scale, grease and dirt from exterior of piping, fittings, valves, etc. before installing insulation. B. Pressure and leak test all piping systems before installing insulation. END OF SECTION PWA BASIC PIPING MATERIALS AND METHODS

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43 SECTION REFRIGERANT PIPING PART 1- GENERAL 1.1 SUMMARY A. This Section includes refrigerant piping used for air-conditioning applications. 1.2 PERFORMANCE REQUIREMENTS A. Line Test Pressure for Refrigerant R-22: 1. Suction Lines for Air-Conditioning Applications: 185 psig. 2. Suction Lines for Heat-Pump Applications: 325 psig. 3. Hot-Gas and Liquid Lines: 325 psig. 1.3 ACTION SUBMITTALS A. Product Data: For each type of valve and refrigerant piping specialty indicated. Include pressure drop based on manufacturer's test data. B. Shop Drawings: Show layout of refrigerant piping and specialties, including pipe, tube, and fitting sizes, flow capacities, valve arrangements and locations, slopes of horizontal runs, oil traps, double risers, wall and floor penetrations, and equipment connection details. Show interface and spatial relationships between piping and equipment. 1.4 INFORMATIONAL SUBMITTALS A. Field quality-control test reports. 1.5 CLOSEOUT SUBMITTALS A. Operation and maintenance data. 1.6 QUALITY ASSURANCE A. Comply with ASHRAE 15, "Safety Code for Refrigeration Systems." B. Comply with ASME B31.5, "Refrigeration Piping and Heat Transfer Components." PWA REFRIGERANT PIPING

44 1.7 PRODUCT STORAGE AND HANDLING A. Store piping in a clean and protected area with end caps in place to ensure that piping interior and exterior are clean when installed. PART 2- PRODUCTS 2.1 COPPER TUBE AND FITTINGS A. B. c. D. E. F. Copper Tube: ASTM B 88, Type K or L. Wrought-Copper Fittings: ASME BI6.22. Wrought-Copper Unions: ASME B Solder Filler Metals: ASTM B 32. Use 95-5 tin antimony or alloy HB solder to join copper socket fittings on copper pipe. Brazing Filler Metals: AWS A5.8. Flexible Connectors: I. Body: Tin-bronze bellows with woven, flexible, tinned-bronze-wire-reinforced protective jacket. 2. End Connections: Socket ends. 3. Offset Performance: Capable of minimum 3/4-inch misalignment in minimum 7-inchlong assembly. 4. Pressure Rating: Factory test at minimum 500 psig. 5. Maximum Operating Temperature: 250 deg F. 2.2 VALVES AND SPECIAL TIES A. Service Valves: 1. Body: Forged brass with brass cap including key end to remove core. 2. Core: Removable full-port ball-type check valve with stainless-steel spring. 3. Seat: Polytetrafluoroethylene. 4. End Connections: Copper spring. 5. Working Pressure Rating: 500 psig. 2.3 REFRIGERANTS A. Available Manufacturers: Subject to compliance with requirements, manufacturers offering products that may be incorporated into the Work include, but are not limited to, the following: I. Atofina Chemicals, Inc. 2. DuPont Company; Fluorochemicals Div. 3. Honeywell, Inc.; Genetron Refrigerants. PWA REFRIGERANT PIPING

45 4. INEOS Fluor Americas LLC. B. ASHRAE 34, R-22: Monochlorodifluoromethane. PART 3- EECUTION 3.1 PIPING APPLICATIONS A. Hot-Gas and Liquid Lines and Suction Lines for Heat-Pump Applications: Copper, Type ACR, annealed-temper tubing and wrought-copper fittings with brazed joints. B. Safety-Relief-Valve Discharge Piping: Copper, Type ACR, drawn-temper tubing and wroughtcopper fittings with soldered joints. 3.2 PIPING INSTALLATION A. Drawing plans, schematics, and diagrams indicate general location and arrangement of piping systems; indicated locations and arrangements were used to size pipe and calculate friction loss, expansion, pump sizing, and other design considerations. Install piping as indicated unless deviations to layout are approved on Shop Drawings. B. Install refrigerant piping according to ASHRAE 15. C. Install piping in concealed locations unless otherwise indicated and except in equipment rooms and service areas. D. Install piping indicated to be exposed and piping in equipment rooms and service areas at right angles or parallel to building walls. Diagonal runs are prohibited unless specifically indicated otherwise. E. Install piping above accessible ceilings to allow sufficient space for ceiling panel removal. F. Install piping adjacent to machines to allow service and maintenance. G. Install piping free of sags and bends. H. Install fittings for changes in direction and branch connections. I. Select system components with pressure rating equal to or greater than system operating pressure. J. Refer to Section "Instrumentation and Control for HVAC" and Section "Sequence and Operations for HVAC Controls" for solenoid valve controllers, control wiring, and sequence of operation. K. Install piping as short and direct as possible, with a minimum number of joints, elbows, and fittings. PWA REFRIGERANT PIPING

46 L. Arrange piping to allow inspection and service of refrigeration equipment. Install valves and specialties in accessible locations to allow for service and inspection. Install access doors or panels as specified in Section "Access Doors and Frames" if valves or equipment requiring maintenance is concealed behind finished surfaces. M. Install refrigerant piping in protective conduit where installed belowground. N. Install refrigerant piping in rigid or flexible conduit in locations where exposed to mechanical injury. 0. Slope refrigerant piping as follows: I. Install horizontal hot-gas discharge piping with a uniform slope downward away from compressor. 2. Install horizontal suction lines with a uniform slope downward to compressor. 3. Install traps and double risers to entrain oil in vertical runs. 4. Liquid lines may be installed level. P. Q. R. s. T. When brazing or soldering, remove solenoid-valve coils and sight glasses; also remove valve stems, seats, and packing, and accessible internal parts of refrigerant specialties. Do not apply heat near expansion-valve bulb. Install piping with adequate clearance between pipe and adjacent walls and hangers or between pipes for insulation installation. Identify refrigerant piping and valves according to Section "Identification for HV AC Piping and Equipment." Install sleeves for piping penetrations of walls, ceilings, and floors. Comply with requirements for sleeves specified in Section "Sleeves and Sleeve Seals for HV AC Piping." Install escutcheons for piping penetrations of walls, ceilings, and floors. Comply with requirements for escutcheons specified in Section "Escutcheons for HV AC Piping." 3.3 PIPE JOINT CONSTRUCTION A. Soldered Joints: Construct joints according to ASTM B 828 or CDA's "Copper Tube Handbook." B. Brazed Joints: Construct joints according to A WS's "Brazing Handbook," Chapter "Pipe and Tube." I. Use Type BcuP, copper-phosphorus alloy for joining copper socket fittings with copper pipe. 2. Use Type BAg, cadmium-free silver alloy for joining copper with bronze or steel. 3.4 HANGERS AND SUPPORTS A. Hanger, support, and anchor products are specified in Section "Hangers and Supports for HV AC Piping and Equipment." PWA REFRIGERANT PIPING

47 B. Install the following pipe attachments: 1. Adjustable steel clevis hangers for individual horizontal runs less than 20 feet long. 2. Roller hangers and spring hangers for individual horizontal runs 20 feet or longer. 3. Pipe Roller: MSS SP-58, Type 44 for multiple horizontal piping 20 feet or longer, supported on a trapeze. 4. Spring hangers to support vertical runs. 5. Copper-clad hangers and supports for hangers and supports in direct contact with copper pipe. C. Install hangers for copper tubing with the following maximum spacing and minimum rod sizes: 1. NPS 112: Maximum span, 60 inches; minimum rod size, 114 inch. 2. NPS 5/8: Maximum span, 60 inches; minimum rod size, 114 inch. 3. NPS 1: Maximum span, 72 inches; minimum rod size, 114 inch. 4. NPS 1-114: Maximum span, 96 inches; minimum rod size, 3/8 inch. 5. NPS 1-112: Maximum span, 96 inches; minimum rod size, 3/8 inch. 6. NPS 2: Maximum span, 96 inches; minimum rod size, 3/8 inch. 7. NPS 2-112: Maximum span, 108 inches; minimum rod size, 3/8 inch. 8. NPS 3: Maximum span, 10 feet; minimum rod size, 3/8 inch. 9. NPS 4: Maximum span, 12 feet; minimum rod size, 112 inch. D. Support multifloor vertical runs at least at each floor. 3.5 A. B. FIELD QUALITY CONTROL Perform tests and inspections and prepare test reports. Tests and Inspections: 1. Comply with ASME B31.5, Chapter VI. 2. Test refrigerant piping and specialties. Isolate compressor, condenser, evaporator, and safety devices from test pressure if they are not rated above the test pressure. 3. Test high- and low-pressure side piping of each system separately at not less than the pressures indicated in Part 1 "Performance Requirements" Article. a. Fill system with nitrogen to the required test pressure. b. System shall maintain test pressure at the manifold gage throughout duration of test. c. Test joints and fittings with electronic leak detector or by brushing a small amount of soap and glycerin solution over joints. d. Remake leaking joints using new materials, and retest until satisfactory results are achieved. 3.6 SYSTEM CHARGING A. Charge system using the following procedures: 1. Install core in filter dryers after leak test but before evacuation. PWA REFRIGERANT PIPING

48 2. Evacuate entire refrigerant system with a vacuum pump to 500 micrometers. If vacuum holds for 12 hours, system is ready for charging. 3. Break vacuum with refrigerant gas, allowing pressure to build up to 2 psig. 4. Charge system with a new filter-dryer core in charging line. 3.7 ADJUSTING A. Adjust high- and low-pressure switch settings to avoid short cycling in response to fluctuating suction pressure. B. Adjust set-point temperature of air-conditioning or chilled-water controllers to the system design temperature. C. Perform the following adjustments before operating the refrigeration system, according to manufacturer's written instructions: 1. Open shutoff valves in condenser water circuit. 2. Verify that compressor oil level is correct. 3. Open compressor suction and discharge valves. 4. Open refrigerant valves except bypass valves that are used for other purposes. 5. Check open compressor-motor alignment and verify lubrication for motors and bearings. D. Replace core of replaceable filter dryer after system has been adjusted and after design flow rates and pressures are established. END OF SECTION PWA REFRIGERANT PIPING

49 SECTION METAL DUCTS PART 1 - GENERAL 1.1 SUMMARY A. Section Includes: 1. Rectangular ducts and fittings. 2. Round ducts and fittings. 3. Double-wall spiral duct and fittings. 4. Sheet metal materials. 5. Sealants and gaskets. 6. Hangers and supports. B. Related Sections: 1. Section "Testing, Adjusting, and Balancing for HV AC" for testing, adjusting, and balancing requirements for metal ducts. 2. Section "Air Duct Accessories" for dampers, sound-control devices, duct-mounting access doors and panels, turning vanes, and flexible ducts. 1.2 PERFORMANCE REQUIREMENTS A. Delegated Duct Design: Duct construction, including sheet metal thicknesses, seam and joint construction, reinforcements, and hangers and supports, shall comply with SMACNA's "HV AC Duct Construction Standards - Metal and Flexible" and performance requirements and design criteria indicated in "Duct Schedule" Article. B. Structural Performance: Duct hangers and supports shall withstand the effects of gravity loads and stresses within limits and under conditions described in SMACNA's "HV AC Duct Construction Standards - Metal and Flexible" C. Airstream Surfaces: Surfaces in contact with the airstream shall comply with requirements in ASHRAE ACTION SUBMITTALS A. Product Data: For each type of product indicated. B. Shop Drawings: 1. Factory- and shop-fabricated ducts and fittings. 2. Fittings. 3. Reinforcement and spacing. 4. Seam and joint construction. 5. Penetrations through fire-rated and other partitions. 6. Locations for duct accessories, including dampers, turning vanes, and access doors and panels. 7. Hangers and supports, including methods for duct and building attachment and vibration isolation. 1.4 QUALITY ASSURANCE A. ASHRAE Compliance: Applicable requirements in ASHRAE 62.1, Section 5 - "Systems and Equipment" and Section 7- "Construction and System Start-up." B. ASHRAE/IESNA Compliance: Applicable requirements in ASHRAE/IESNA 90.1, Section "HV AC System Construction and Insulation." PART 2- PRODUCTS 2.1 RECTANGULAR DUCTS AND FITTINGS A. General Fabrication Requirements: Comply with SMACNA's "HV AC Duct Construction Standards - Metal and Flexible" based on indicated static-pressure class unless otherwise indicated. PWA METAL DUCTS

50 B. c. D. 2.2 A. 2.3 B. c. D. A. B. Transverse Joints: Select joint types and fabricate according to SMACNA's "HV AC Duct Construction Standards- Metal and Flexible," Figure 2-1, "Rectangular Duct/Transverse Joints," for static-pressure class, applicable sealing requirements, materials involved, duct-support intervals, and other provisions in SMACNA's "HV AC Duct Construction Standards - Metal and Flexible." Longitudinal Seams: Select seam types and fabricate according to SMACNA's "HV AC Duct Construction Standards - Metal and Flexible," Figure 2-2, "Rectangular Duct/Longitudinal Seams," for static-pressure class, applicable sealing requirements, materials involved, ductsupport intervals, and other provisions in SMACNA's "HV AC Duct Construction Standards - Metal and Flexible." Elbows, Transitions, Offsets, Branch Connections, and Other Duct Construction: Select types and fabricate according to SMACNA's "HVAC Duct Construction Standards - Metal and Flexible," Chapter 4, "Fittings and Other Construction," for static-pressure class, applicable sealing requirements, materials involved, duct-support intervals, and other provisions in SMACNA's "HV AC Duct Construction Standards - Metal and Flexible." ROUND DUCTS AND FITTINGS General Fabrication Requirements: Comply with SMACNA's "HV AC Duct Construction Standards- Metal and Flexible," Chapter 3, "Round, Oval, and Flexible Duct," based on indicated static-pressure class unless otherwise indicated. Transverse Joints: Select joint types and fabricate according to SMACNA's "HV AC Duct Construction Standards - Metal and Flexible," Figure 3-1, "Round Duct Transverse Joints," for static-pressure class, applicable sealing requirements, materials involved, duct-support intervals, and other provisions in SMACNA's "HV AC Duct Construction Standards- Metal and Flexible." 1. Transverse Joints in Ducts Larger Than 60 Inches in Diameter: Flanged. Longitudinal Seams: Select seam types and fabricate according to SMACNA's "HV AC Duct Construction Standards -Metal and Flexible," Figure 3-2, "Round Duct Longitudinal Seams," for static-pressure class, applicable sealing requirements, materials involved, duct-support intervals, and other provisions in SMACNA's "HV AC Duct Construction Standards- Metal and Flexible." 1. Fabricate round ducts larger Than 90 inches in diameter with butt-welded longitudinal seams. Tees and Laterals: Select types and fabricate according to SMACNA's "HV AC Duct Construction Standards - Metal and Flexible," Figure 3-5, "90 Degree Tees and Laterals," and Figure 3-6, "Conical Tees," for static-pressure class, applicable sealing requirements, materials involved, duct-support intervals, and other provisions in SMACNA's "HV AC Duct Construction Standards - Metal and Flexible." DOUBLE WALL DUCT Double wall duct shall be constructed of an outer shell, a 1" thick layer of fiberglass insulation and an inner metal liner. Insulation shall have a thermal conductivity "K" factor of.26 BTU/hr/sq. ft.jdf or less. The inner metal liner for all spiral and longitudinal seam duct shall be solid metal. 2.4 A. B. SHEET METAL MATERIALS General Material Requirements: Comply with SMACNA's "HV AC Duct Construction Standards - Metal and Flexible" for acceptable materials, material thicknesses, and duct construction methods unless otherwise indicated. Sheet metal materials shall be free of pitting, seam marks, roller marks, stains, discolorations, and other imperfections. Galvanized Sheet Steel: Comply with ASTM A 653/A 653M. 1. Galvanized Coating Designation: G Finishes for Surfaces Exposed to View: Mill phosphatized. PWA METAL DUCTS

51 c. D. 2.5 A. B. c. D. E. F. Reinforcement Shapes and Plates: ASTM A 36/A 36M, steel plates, shapes, and bars; black and galvanized. 1. Where black- and galvanized-steel shapes and plates are used to reinforce aluminum ducts, isolate the different metals with butyl rubber, neoprene, or EPDM gasket materials. Tie Rods: Galvanized steel, 1/4-inch minimum diameter for lengths 36 inches or less; 3/8-inch minimum diameter for lengths longer than 36 inches. SEALANT AND GASKETS General Sealant and Gasket Requirements: Surface-burning characteristics for sealants and gaskets shall be a maximum flame-spread index of 25 and a maximum smoke-developed index of 50 when tested according to UL 723; certified by an NRTL. Two-Part Tape Sealing System: 1. Tape: Woven cotton fiber impregnated with mineral gypsum and modified acrylic/silicone activator to react exothermically with tape to form hard, durable, airtight seal. 2. Tape Width: 4 inches. 3. Sealant: Modified styrene acrylic. 4. Water resistant. 5. Mold and mildew resistant. 6. Maximum Static-Pressure Class: 10-inch wg, positive and negative. 7. Service: Indoor and outdoor. 8. Service Temperature: Minus 40 to plus 200 deg F. 9. Substrate: Compatible with galvanized sheet steel (both PVC coated and bare), stainless steel, or aluminum. 10. For indoor applications, sealant shall have a VOC content of 250 gil or less when calculated according to 40 CFR 59, Subpart D (EPA Method 24). 11. Sealant shall comply with the testing and product requirements of the California Department of Health Services' "Standard Practice for the Testing of Volatile Organic Emissions from Various Sources Using Small-Scale Environmental Chambers." Water-Based Joint and Seam Sealant: 1. Application Method: Brush on. 2. Solids Content: Minimum 65 percent. 3. Shore A Hardness: Minimum Water resistant. 5. Mold and mildew resistant. 6. VOC: Maximum 75 gil (less water). 7. Maximum Static-Pressure Class: 10-inch wg, positive and negative. 8. Service: Indoor or outdoor. 9. Substrate: Compatible with galvanized sheet steel (both PVC coated and bare), stainless steel, or aluminum sheets. Flanged Joint Sealant: Comply with ASTM C General: Single-component, acid-curing, silicone, elastomeric. 2. Type: S. 3. Grade: NS. 4. Class: Use: For indoor applications, sealant shall have a VOC content of 250 gil or less when calculated according to 40 CFR 59, Subpart D (EPA Method 24). 7. Sealant shall comply with the testing and product requirements of the California Department of Health Services' "Standard Practice for the Testing of Volatile Organic Emissions from Various Sources Using Small-Scale Environmental Chambers." Flange Gaskets: Butyl rubber, neoprene, or EPDM polymer with polyisobutylene plasticizer. Round Duct Joint 0-Ring Seals: PWA METAL DUCTS

52 1. Seal shall provide maximum 3 cfm/1 00 sq. ft. at l-inch wg and shall be rated forl 0-inch wg static-pressure class, positive or negative. 2. EPDM 0-ring to seal in concave bead in coupling or fitting spigot. 3. Double-lipped, EPDM 0-ring seal, mechanically fastened to factory-fabricated couplings and fitting spigots. 2.6 HANGERS AND SUPPORTS A. Hanger Rods for Noncorrosive Environments: Cadmium-plated steel rods and nuts. B. Hanger Rods for Corrosive Environments: Electrogalvanized, all-thread rods or galvanized rods with threads painted with zinc-chromate primer after installation. C. Strap and Rod Sizes: Comply with SMACNA's "HV AC Duct Construction Standards - Metal and Flexible," Table 5-l, "Rectangular Duct Hangers Minimum Size," and Table 5-2, "Minimum Hanger Sizes for Round Duct." D. Steel Cables for Galvanized-Steel Ducts: Galvanized steel complying with ASTM A 603. E. Steel Cable End Connections: Cadmium-plated steel assemblies with brackets, swivel, and bolts designed for duct hanger service; with an automatic-locking and clamping device. F. Duct Attachments: Sheet metal screws, blind rivets, or self-tapping metal screws; compatible with duct materials. G. Trapeze and Riser Supports: 1. Supports for Galvanized-Steel Ducts: Galvanized-steel shapes and plates. 2. Supports for Stainless-Steel Ducts: Stainless-steel shapes and plates. 3. Supports for Aluminum Ducts: Aluminum or galvanized steel coated with zinc chromate. PART 3- EECUTION 3.1 A. B. c. D. E. F. G. H. I. J. K. L. 3.2 A. DUCT INSTALLATION Drawing plans, schematics, and diagrams indicate general location and arrangement of duct system. Indicated duct locations, configurations, and arrangements were used to size ducts and calculate friction loss for air-handling equipment sizing and for other design considerations. Install duct systems as indicated unless deviations to layout are approved on Shop Drawings and Coordination Drawings. Install ducts according to SMACNA's "HV AC Duct Construction Standards - Metal and Flexible" unless otherwise indicated. Install round ducts in maximum practical lengths. Install ducts with fewest possible joints. Install factory- or shop-fabricated fittings for changes in direction, size, and shape and for branch connections. Unless otherwise indicated, install ducts vertically and horizontally, and parallel and perpendicular to building lines. Install ducts close to walls, overhead construction, columns, and other structural and permanent enclosure elements of building. Install ducts with a clearance of 1 inch, plus allowance for insulation thickness. Route ducts to avoid passing through transformer vaults and electrical equipment rooms and enclosures. Where ducts pass through non-fire-rated interior partitions and exterior walls and are exposed to view, cover the opening between the partition and duct or duct insulation with sheet metal flanges of same metal thickness as the duct. Overlap openings on four sides by at least inches. Where ducts pass through fire-rated interior partitions and exterior walls, install fire dampers. Comply with requirements in Section "Air Duct Accessories" for fire and smoke dampers. Protect duct interiors from moisture, construction debris and dust, and other foreign materials. Comply with SMACNA's "IAQ Guidelines for Occupied Buildings Under Construction," Appendix G, "Duct Cleanliness for New Construction Guidelines." INSTALLATION OF EPOSED DUCTWORK Protect ducts exposed in finished spaces from being dented, scratched, or damaged. PWA METAL DUCTS

53 3.3 B. c. D. E. A. B. c. 3.4 A. B. 3.5 A. B. Trim duct sealants flush with metal. Create a smooth and uniform exposed bead. Do not use twopart tape sealing system. Grind welds to provide smooth surface free of burrs, sharp edges, and weld splatter. When welding stainless steel with a No. 3 or 4 finish, grind the welds flush, polish the exposed welds, and treat the welds to remove discoloration caused by welding. Maintain consistency, symmetry, and uniformity in the arrangement and fabrication of fittings, hangers and supports, duct accessories, and air outlets. Repair or replace damaged sections and finished work that does not comply with these requirements. ADDITIONAL INSTALLATION REQUIREMENTS FOR COMMERCIAL KITCHEN HOOD EHAUST DUCT Install commercial kitchen hood exhaust ducts without dips and traps that may hold grease, and sloped a minimum of 2 percent to drain grease back to the hood. Install fire-rated access panel assemblies at each change in direction and at maximum intervals of 20 feet in horizontal ducts, and at every floor for vertical ducts, or as indicated on Drawings. Locate access panel on top or sides of duct a minimum of inches from bottom of duct. Do not penetrate fire-rated assemblies except as allowed by applicable building codes and authorities having jurisdiction. DUCT SEALING Seal ducts for duct static-pressure, seal classes, and leakage classes specified in "Duct Schedule" Article according to SMACNA's "HV AC Duct Construction Standards - Metal and Flexible." Seal ducts to the following seal classes according to SMACNA's "HV AC Duct Construction Standards - Metal and Flexible": 1. Comply with SMACNA's "HV AC Duct Construction Standards- Metal and Flexible." 2. Outdoor, Supply-Air Ducts: Seal Class A. 3. Outdoor, Exhaust Ducts: Seal Class C. 4. Outdoor, Return-Air Ducts: Seal Class C. 5. Unconditioned Space, Supply-Air Ducts in Pressure Classes 2-Inch wg and Lower: Seal Class B. 6. Unconditioned Space, Supply-Air Ducts in Pressure Classes Higher Than 2-Inch wg: Seal Class A. 7. Unconditioned Space, Exhaust Ducts: Seal Class C. 8. Unconditioned Space, Return-Air Ducts: Seal Class B. 9. Conditioned Space, Supply-Air Ducts in Pressure Classes 2-Inch wg and Lower: Seal Class C. 10. Conditioned Space, Supply-Air Ducts in Pressure Classes Higher Than 2-Inch wg: Seal Class B. 11. Conditioned Space, Exhaust Ducts: Seal Class B. 12. Conditioned Space, Return-Air Ducts: Seal Class C. HANGER AND SUPPORT INSTALLATION Comply with SMACNA's "HV AC Duct Construction Standards- Metal and Flexible," Chapter 5, "Hangers and Supports." Building Attachments: Concrete inserts, powder-actuated fasteners, or structural-steel fasteners appropriate for construction materials to which hangers are being attached. I. Where practical, install concrete inserts before placing concrete. 2. Install powder-actuated concrete fasteners after concrete is placed and completely cured. 3. Use powder-actuated concrete fasteners for standard-weight aggregate concretes or for slabs more than 4 inches thick. 4. Do not use powder-actuated concrete fasteners for lightweight-aggregate concretes or for slabs less than 4 inches thick. 5. Do not use powder-actuated concrete fasteners for seismic restraints. PWA METAL DUCTS

54 c. D. E. F. 3.6 A. B. 3.7 A. 3.8 A. B. c. Hanger Spacing: Comply with SMACNA's "HV AC Duct Construction Standards - Metal and Flexible," Table 5-1, "Rectangular Duct Hangers Minimum Size," and Table 5-2, "Minimum Hanger Sizes for Round Duct," for maximum hanger spacing; install hangers and supports within 24 inches of each elbow and within 48 inches of each branch intersection. Hangers Exposed to View: Threaded rod and angle or channel supports. Support vertical ducts with steel angles or channel secured to the sides of the duct with welds, bolts, sheet metal screws, or blind rivets; support at each floor and at a maximum intervals of 16 feet. Install upper attachments to structures. Select and size upper attachments with pull-out, tension, and shear capacities appropriate for supported loads and building materials where used. CONNECTIONS Make connections to equipment with flexible connectors complying with Section "Air Duct Accessories." Comply with SMACNA's "HV AC Duct Construction Standards - Metal and Flexible" for branch, outlet and inlet, and terminal unit connections. STARTUP Air Balance: Comply with requirements in Section "Testing, Adjusting, and Balancing forhvac." DUCT SCHEDULE Fabricate ducts with galvanized sheet steel except as otherwise indicated. Supply and Return Ducts: 1. Ducts Connected to Fan Coil Units, Furnaces, Heat Pumps, and Terminal Units: a. Pressure Class: Positive 2-inch wg. b. SMACNA Leakage Class for Rectangular: 12. c. SMACNA Leakage Class for Round and Flat Oval: 12. d. Liner: 1" internal 2. Ducts Connected to Constant-Volume Air-Handling Units: a. Pressure Class: Positive 2-inch wg. b. SMACNA Leakage Class for Rectangular: 6. c. SMACNA Leakage Class for Round and Flat Oval: 6. d. Liner: 1" internal 3. Ducts Connected to Variable-Air-Volume Air-Handling Units: a. Pressure Class: Positive 3-inch wg. b. SMACNA Leakage Class for Rectangular: 3. c. SMACNA Leakage Class for Round and Flat Oval: 3. d. Liner: 1" internal 4. Spiral Ducts Exposed in finished spaces: a. Shall be double-wall spiral b. Pressure Class: Positive 3-inch wg. c. SMACNA Leakage Class for Round and Flat Oval: 3. d. Liner: 1" internal between duct walls 5. Ducts Connected to Equipment Not Listed Above: a. Pressure Class: Positive 2-inch wg. b. SMACNA Leakage Class for Rectangular: 3. c. SMACNA Leakage Class for Round and Flat Oval: 3. d. Liner: 1" internal Exhaust Ducts: 1. Ducts Connected to Fans Exhausting (ASHRAE 62.1, Class 1 and 2) Air: a. Pressure Class: Negative l-inch wg. b. SMACNA Leakage Class for Rectangular: 12. c. SMACNA Leakage Class for Round and Flat Oval: 6. PWA METAL DUCTS

55 2. Ducts Connected to Air-Handling Units: a. Pressure Class: Positive or negative 3-inch wg. b. SMACNA Leakage Class for Rectangular: 6. c. SMACNA Leakage Class for Round and Flat Oval: Ducts Connected to Commercial Kitchen Hoods: Comply with NFPA 96. a. Exposed to View: Type 304, stainless-steel sheet, No. 3 finish. b. Concealed: Carbon-steel sheet. c. Welded seams and joints. d. Pressure Class: Positive or negative 2-inch wg. e. Minimum SMACNA Seal Class: Welded seams, joints, and penetrations. f. SMACNA Leakage Class: Ducts Connected to Dishwasher Hoods: a. Type 304, stainless-steel sheet. b. Exposed to View: No. 3 finish. c. Concealed: No. 2D finish. d. Welded seams and flanged joints with watertight EPDM gaskets. e. Pressure Class: Positive or negative 2-inch wg. f. Minimum SMACNA Seal Class: Welded or flanged seams, joints, and penetrations. g. SMACNA Leakage Class: Ducts Connected to Equipment Not Listed Above: a. Pressure Class: Positive or negative 2-inch wg. b. Minimum SMACNA Seal Class: B if negative pressure, and A if positive pressure. c. SMACNA Leakage Class for Rectangular: 6. d. SMACNA Leakage Class for Round and Flat Oval: 3. D. Outdoor-Air (Not Filtered, Heated, or Cooled) Ducts: 1. Ducts Connected to Fan Coil Units, Furnaces, Heat Pumps, and Terminal Units: a. Pressure Class: Positive or negative l-inch wg. b. SMACNA Leakage Class for Rectangular: 12. c. SMACNA Leakage Class for Round and Flat Oval: Ducts Connected to Air-Handling Units: a. Pressure Class: Positive or negative 2-inch wg. b. SMACNA Leakage Class for Rectangular: 6. c. SMACNA Leakage Class for Round and Flat Oval: Ducts Connected to Equipment Not Listed Above: a. Pressure Class: Positive or negative 2-inch wg. b. SMACNA Leakage Class for Rectangular: 3. c. SMACNA Leakage Class for Round and Flat Oval: 3. E. Intermediate Reinforcement: 1. Galvanized-Steel Ducts: Galvanized steel. F. Elbow Configuration: 1. Rectangular Duct: Comply with SMACNA's "HV AC Duct Construction Standards - Metal and Flexible," Figure 4-2, "Rectangular Elbows." 2. Rectangular Duct: Comply with SMACNA's "HV AC Duct Construction Standards - Metal and Flexible," Figure 4-2, "Rectangular Elbows." 3. Round Duct: Comply with SMACNA's "HVAC Duct Construction Standards- Metal and Flexible," Figure 3-4, "Round Duct Elbows." a. Minimum Radius-to-Diameter Ratio and Elbow Segments: Comply with SMACNA's "HV AC Duct Construction Standards - Metal and Flexible," Table 3-1, "Mitered Elbows." Elbows with less than 90-degree change of direction have proportionately fewer segments. b. Round Elbows, 12 Inches and Smaller in Diameter: Stamped or pleated. c. Round Elbows, 14 Inches and Larger in Diameter: Standing seam. G. Branch Configuration: PWA METAL DUCTS

56 1. Rectangular Duct: Comply with SMACNA's "HV AC Duct Construction Standards - Metal and Flexible," Figure 4-6, "Branch Connection." a. Rectangular Main to Rectangular Branch: 45-degree entry. b. Rectangular Main to Round Branch: Spin in. 2. Round: Comply with SMACNA's "HV AC Duct Construction Standards - Metal and Flexible," Figure 3-5, "90 Degree Tees and Laterals," and Figure 3-6, "Conical Tees." Saddle taps are permitted in existing duct. a. Velocity 1000 fpm or Lower: 90-degree tap. b. Velocity 1000 to 1500 fpm: Conical tap. c. Velocity 1500 fpm or Higher: 45-degree lateral. END OF SECTION PWA METAL DUCTS

57 SECTION DUCT ACCESSORIES PART 1 GENERAL 1.01 SECTION INCLUDES A Flexible duct connections SUBMITTALS A See General and Special Conditions for submittal requirements and procedures. B. Product data for duct access doors and flexible duct connections. PART 2 PRODUCTS 2.01 DUCT ACCESS DOORS A Fabricate in accordance with SMACNA HV AC Duct Construction Standards - Metal and Flexible, and as indicated. See schedule on Drawing. B. Fabrication: Rigid and close-fitting of galvanized steel with sealing gaskets and quick fastening locking devices. For insulated ducts, install minimum 1 inch thick insulation with sheet metal cover. C. Access doors with sheet metal screw fasteners are not acceptable FLEIBLE DUCT CONNECTIONS A Fabricate in accordance with SMACNA HV AC Duct Construction Standards - Metal and Flexible, and as indicated. B. Flexible Duct Connections: Fabric crimped into metal edging strip. 1. Fabric: UL listed fire-retardant neoprene coated woven glass fiber fabric to NFPA 90A, minimum density 30 oz per sq yd. a. Net Fabric Width: Approximately 2 inches wide. 2. Metal: 3 inches wide, 24 gage thick galvanized steel LOUVERS A Furnish and install louvers as sized on the drawings, coordinate opening framing with other trades as required for proper opening size and installation. B Louvers shall be high performance low pressure drop, low water penetration and drainable. C Louvers performance shall be AMCA Certified and shall meet or exceed the following specifications: Static pressure drop: 0.07" or less at 750 FPM through free area. Water penetration: Beginning point at.01 oz/ft FPM minimum Free Area: 50% minimum D Louver frame and blades shall be fabricated from 0.80" thick extruded aluminum alloy 6063-TS. Blades and jambs shall have integral gutters for drainage of water. Blades shall be at a 37.5' angle on centers not exceeding 6". Each louver shall be designed to withstand a wind load or other load of 20 pounds per square foot. Birdscreen shall be framed, rear mounted, and removable of%" x 0.051" expanded flattened aluminum. E Where louvers must be made up by multiple sections, the manufacturer shall submit with the shop drawings, all joint locations, methods of bracing/assembly. When the louvers are assembled per the shop drawings they shall meet the above specified structural loading. F Louvers shall have a Kynar 500 finish with a dry film thickness of 1.2 mils. Color to be chosen by the Architect/Engineer from the manufacturer's standard colors at time of shop drawing submittals. G Louvers shall be Rusldn ELF6350DMP or approved equivalent by Arrow, NCA, or Greenheck. PWA DUCT ACCESSORIES

58 PART 3 EECUTION 3.01 INSTALLATION A. Install accessories in accordance with manufacturer's instructions, NFPA 90A, and follow SMACNA HVAC Duct Construction Standards- Metal and Flexible. Refer to Section for duct Static Pressure Construction Class and Seal Class. B. Provide duct access doors for inspection of duct smoke detectors. C. Provide and install flexible duct connections at air handling unit. END OF SECTION PWA DUCT ACCESSORIES

59 SECTION DIFFUSERS, REGISTERS, AND GRILLES PART 1- GENERAL 1.1 SUMMARY A. Section Includes: 1. Rectangular and square ceiling diffusers. 2. Louver face diffusers. 3. Adjustable bar registers and grilles. 4. Fixed face grilles. B. Related Sections: I. Section "Air Duct Accessories" for fire and smoke dampers and volume-control dampers not integral to diffusers, registers, and grilles. 1.2 ACTION SUBMITTALS A. Product Data: For each type of product indicated, include the following: 1. Data Sheet: Indicate materials of construction, finish, and mounting details; and performance data including throw and drop, static-pressure drop, and noise ratings. 2. Diffuser, Register, and Grille Schedule: Indicate drawing designation, room location, quantity, model number, size, and accessories furnished. PART 2- PRODUCTS 2.1 Basis-of-Design Product: Subject to compliance with requirements, provide product indicated on Drawings or comparable product by one of the following: a. Nailor Industries Inc. b. Price Industries. c. Titus. d. Tuttle & Bailey. 2.2 Insulation: All grills for installation in ceiling systems shall be insulated with factory applied insulation. 2.2 SOURCE QUALITY CONTROL A. Verification of Performance: Rate diffusers, registers, and grilles according to ASHRAE 70, "Method of Testing for Rating the Performance of Air Outlets and Inlets." PART 3- EECUTION 3.1 A. B. C. 3.2 A. INSTALLATION Install diffusers, registers, and grilles level and plumb. Ceiling-Mounted Outlets and Inlets: Drawings indicate general arrangement of ducts, fittings, and accessories. Air outlet and inlet locations have been indicated to achieve design requirements for air volume, noise criteria, airflow pattern, throw, and pressure drop. Make final locations where indicated, as much as practical. For units installed in lay-in ceiling panels, locate units in the center of panel. Where architectural features or other items conflict with installation, notify Engineer for a determination of final location. Install diffusers, registers, and grilles with airtight connections to ducts and to allow service and maintenance of dampers, air extractors, and fire dampers. ADJUSTING After installation, adjust diffusers, registers, and grilles to air patterns indicated, or as directed, before starting air balancing. END OF SECTION PWA DIFFUSERS, REGISTERS, AND GRILLES

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61 SECTION MODULAR PACKAGED AIR HANDLING UNITS PART 1 -GENERAL RELATED DOCUMENTS Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 1 Specification Sections, apply to this Section. Section "Seismic Protection" and Section "Basic Mechanical Requirements" and Section "Basic Mechanical Materials and Methods" all apply to the work of this Section as if fully repeated herein. 1.1 SUMMARY A. This Section includes packaged modular air-handling units with coils for indoor installations as further described herein. B. Related Sections include the following: 1. Division 23 Section "Motors" 2. Division 23Section "Duct Accessories" for dampers used as an integral part of factory-packaged airhandling units specified in this Section. 3. Division 23Section "HV AC Instrumentation and Controls" for temperature controls, wiring, devices components, and actuators for dampers furnished under this Section. 4. Division 26 Section "Variable Frequency Drives" for motor controllers utilized to vary speed of the fan motors in response to a temperature control signal. 1.2 REFERENCES 1. AFBMA 9- Load Ratings and Fatigue Life for Ball Bearings. 2. AMCA 99-Standards Handbook 3. AMCA 210-Laboratory Methods of Testing Fans for Rating Purposes 4. AMCA 500-Test Methods for Louver, Dampers, and Shutters. 5. AHRI 340/360 -Unitary Large Equipment 6. NEMA MOl-Motors and Generators 7. National Electrical Code. 8. NFPA 70-National Fire Protection Agency. 9. SMACNA-HV AC Duct Construction Standards-Metal and Flexible. 10. UL 900-Test Performance of Air Filter Units. 1.3 SUBMITTALS B. General: Submit each item in this Article according to the conditions of the contract and Division Specification Sections. C. Product Data: For each type of modular packaged air-handling unit indicated. Include the following: 1. Certified fan-performance curves with system operating conditions indicated. 2. Certified fan-sound power ratings. 3. Certified coil-performance ratings with system operating conditions indicated. 4. Motor ratings, electrical characteristics, and motor and fan accessories. 5. Material gages and finishes. 6. Filters with performance characteristics. 7. Dampers, including housings, linkages, and operators. 8. Product date for all specified accessories. 9. Manufacturer's Installation Instructions D. Shop Drawings from manufacturer detailing equipment assemblies and indicating dimensions, weight, loadings, required clearances, construction details, method of field assembly, electrical characteristics, components and location and size of each field connection. E. Wiring Diagrams: Power, signal, and control wiring. Differentiate between manufacturer-installed and fieldinstalled wiring. E. Field Quality-Control Test Reports: From manufacturer. 1.4 OPERATION AND MAINTENANCE DATA A. Maintenance Data: Provide instructions for installation, maintenance, and service. PWA MODULAR PACKAGED AIR HANDLING UNITS

62 1.4 QUALITY ASSURANCE B. Source Limitations: Obtain modular packaged air-handling units through one source from a single manufacturer. C. Product Options: Drawings indicate size, profiles, and dimensional requirements of factmy packaged airhandling units and are based on the specific system and model indicated. Refer to Division 23 Section "Basic Mechanical Requirements" for guidelines concerning the use of other systems or models. D. NFPA Compliance: Factory packaged air-handling units and components shall be designed, fabricated, and installed in compliance with NFPA 90A, "Installation of Air Conditioning and Ventilating Systems". E. ARI Certification: Factory packaged air-handling units and their components shall be factory tested according to the applicable portions of ARI 430 and shall be listed and bear the label of the Air-Conditioning and Refrigeration Institute (ARI). F. Fan Performance Ratings: Rate according to AMCA 210, "Laboratory Methods of Testing Fans for Rating". In addition, all airfoil fans shall comply with AMCA standard and and shall bear the AMCA Seal. G. Sound Power Level Ratings: Rate according to AMCA 301, "Methods for Calculating Fan Sound Ratings from Laboratory Test Data" and AMCA 300, "Reverberant Room Method for Sound Testing of Fans". Fans shall bear AMCA certified sound ratings seal. H. Air Coils: CertifY capacities, pressure drops an selection procedures in accordance with ARI 410. I. ULand NEMA compliance: Provide motors required as port of air-handling units that are listed and labeled by UL and comply with applicable NEMA standards. J. Comply with NFPA 70 for components and installation. K. Listing and Labeling: Provide electrically operated components specified in this Section that are listed and labeled. 1. The Terms "Listed" and "Labeled": as defined in the National Electrical Code, Article K. Coordination: Coordinate layout and installation of factmy-packaged air-handling units with piping and ductwork and with other installations. 1.5 QUALIFICATIONS A. Manufacturer: Company specializing in manufacturing the Products specified in this section with minimum five years documented experience, who issues complete catalog data on total product. B. Startup must be done by trained personnel experienced with rooftop equipment. C. Do not operate units for any purpose, temporary or permanent, until ductwork is clean, filters and remote controls are in place, bearings lubricated, and manufacturers' installation instructions have been followed. 1.6 DELNERY, STORAGE, AND HANDLING D. Deliver air-handling unit as a factory-assembled module with shipping splits only as necessary and with protective crating and covering. E. Lift and support units with manufacturer's designated lifting or supporting points ETRA MATERIALS A. Furnish extra materials described below that match product installed and that are packaged with protective covering for storage and identified with labels describing contents. 1. Filters: Furnish additional sets as specified in Division 15 Section "Air Filters. 2. Fan Belts: Furnish one (1) additional complete set for each modular packaged air-handling unit fan. 3. Gaskets: Furnish one ( 1) additional complete set for each access door. PART 2- PRODUCTS 2.1 MANUFACTURERS A. Manufacturers: Subject to compliance with requirements, provide products by one of the following: 1. Carrier, Div of United Technologies Corp 2. CES Group Inc.; Governair, Mammoth, Temtrol, Venmar Ventral, Webco Divisions 3. Engineered Air 4. McQuay International 5. Trane Company (The); Worldwide Applied System Group 6. York International Corporation 2.1 GENERAL DESCRIPTION PWA MODULAR PACKAGED AIR HANDLING UNITS

63 A. Furnish as shown on plans, single zone Heating and Cooling Unit(s). Unit performance and electrical characteristics shall be per the job schedule. B. Configuration: Fabricate as detailed on prints and drawings: 1. Return plenum I economizer section 2. Filter section 3. Cooling coil section 4. Supply fan section 5. Gas heating section. 6. Condensing unit section C. The complete unit shall be cetlus listed. D. Each unit shall be specifically designed for outdoor rooftop application and include a weatherproof cabinet. Each unit shall be completely factmy assembled and shipped in one piece. Packaged units shall be shipped fully charged with R-410 Refrigerant and oil. E. The unit shall undergo a complete factory run test prior to shipment. The factory test shall include a refrigeration circuit run test, a unit control system operations checkout, a unit refrigerant leak test and a final unit inspection. F. All units shall have decals and tags to indicate caution areas and aid unit service. Unit nameplates shall be fixed to the main control panel door. Electrical wiring diagrams shall be attached to the control panels. Installation, operating and maintenance bulletins and start-up forms shall be supplied with each unit. G. Performance: All scheduled EER, IEER, capacities and face areas are minimum accepted values. All scheduled amps, kw, and HP are maximum accepted values that allow scheduled capacity to be met. H. Warranty: The manufacturer shall provide 12-month parts only warranty. Defective parts shall be repaired or replaced during the warranty period at no charge. The warranty period shall commence at startup or six months after shipment, whichever occurs first. 2.2 CABINET A. Materials: Formed and reinforced G-90 mill galvanized steel wall and top panels, fabricated to allow removal for access to internal patis and components without affecting the structural integrity of the unit, with joints between sections sealed. I. Outer Casing: Galvanized steel, 16-gage; 18-gage permitted in unit nominal cross-section sizes 40 sf and smaller. 2. Inner Casing: Galvanized steel, 20-gage solid in all sections, except the following sections shall feature perforated inner walls: Supply fan section. 3. Option: 22-gage external/internal casing thickness will be acceptable in lieu of the above requirements if applied as part of an engineered panel construction using closed-cell insulation, and if the assembly meets pressure and rigidity requirements specified elsewhere in this section. 4. Floor Plate: Galvanized steel, 18-gage solid. B. Base Rail: The entire unit shall be supported on a 14-gage galvanized steel rail channel or rustproof-painted structural steel rail. Minimum rail height shall be 4". Provide integral lifting lugs. C. Insulation: Glass-fiber insulation, complying with ASTM C 1071 and NFPA 90A. 1. Thermal Performance: k-value 0.26 BTU-in (hr-sf-degf) at 75 F mean temperature. 2. Thickness: 2 inches (50 mm), 3 point density 3. Option: Closed-cell insulation of at lest 2-pound density and R-12 thermal performance will also be acceptable. 4. Fire Hazard Classification: Maximum flame-spread index of 25 and smoke-developed index of 50, when tested according to ASTM C Location and Application: Encased between outside and inside casing. D. Access Doors: Same materials and finishes as cabinet and complete with hinges, latches, handles, and gaskets. All doors shall have direction of swing chosen to provide a seating head pressure against the door gasket. PWA MODULAR PACKAGED AIR HANDLING UNITS

64 1. The following locations, and other unit sections as indicated on Drawings, shall have access doors sized and located to allow periodic maintenance and inspections. Access doors shall be on the same side of the unit as the coil connections unless indicated otherwise. a) Fan Section, motor side. b) Access Section. c) Coil Section d) Damper Section. e) Filter Section. 2. Latches: Minimum of two (2) heavy-duty industrial-type per door. 3. Not Acceptable: Access panels which do not remain attached to the unit when opened E. Drain Pans: Readily cleanable, formed sections of stainless steel sheet complying with ASHRAE Standard 62. Fabricate pans in sizes and shapes to collect condensate from cooling coils (including coil piping connections and return bends) when units are operating at maximum catalogued face velocity across cooling coil. Pans shall be sloped in two planes for complete drainage to a single outlet without standing water. 1. Drain Connection: Same side of unit as coil connection side, unless noted otherwise; pre-piped to exterior of unit. 2. Units with stacked coils shall have an intermediate drain pan or drain trough to collect condensate from top coil. 3. All portions of the drain pan, including intermediate pans and any hardware subject to contact with condensate, shall be constructed of Type 304 stainless stee I. 4. Pa-top Surface Coating; Elastomeric compound. 5. Fasteners: All fasteners exposed to weather shall be corrosion-resistant. 2.3 ECONOMIZER SECTION A. Unit shall be provided with an outdoor air economizer section. The economizer section shall include outdoor, return, and exhaust air dampers. The economizer operation shall be fully integral to the mechanical cooling and allow up to 100% of mechanical cooling if needed to maintain the cooling discharge air temperature. The outdoor air hood shall be factory installed and constructed from galvanized steel finished with the same durable paint finish as the main unit. The hood shall include moisture eliminator filters to drain water away from the entering air stream. The outside and return air dampers shall be sized to handle 100% of the supply air volume. The dampers shall be parallel blade design. Damper blades shall be gasketed with side seals to provide an air leakage rate of 4 cfm I square foot of damper area at 1" differential pressure per ASHRAE 90.1 Energy Standard. A barometric exhaust damper shall be provided to exhaust air out of the back of the unit. A bird screen shall be provided to prevent infiltration of rain and foreign materials. Exhaust damper blades shall be lined with vinyl gasketing on contact edges. Control of the dampers shall be by a factory installed direct coupled actuator. Damper actuator shall be of the modulating, spring return type. A comparative enthalpy control shall be provided to sense and compare enthalpy in both the outdoor and return air streams to determine if outdoor air is suitable for "free" cooling. If outdoor air is suitable for "free" cooling, the outdoor air dampers shall modulate in response to the unit's temperature control system. 2.4 ENERGY RECOVERY SECTION A. The rooftop unit shall be provided with an AHRI certified rotary wheel air-to-air heat exchanger in a cassette frame complete with seals, drive motor and drive belt. The energy recovery wheel shall be an integral part of the rooftop unit with unitary construction and does not require field assembly. Bolt-on energy recovery units that require field assembly and section to section gasketing and sealing are not acceptable. B. The wheel capacity, air pressure drop and effectiveness shall be AHRI certified per AHRI Standard Thermal performance shall be certified by the manufacturer in accordance with ASHRAE Standard 84, Method of Testing Air-to-Air Heat Exchangers and AHRI Standard 1060, Rating Air-to-Air Heat Exchangers For Energy Recovery Ventilation Equipment. C. The rooftop unit shall be designed with a track so the entire energy recovery wheel cassette can slide out from the rooftop unit to facilitate cleaning. D. The unit shall have 2" Merv 7 filters for the outdoor air before the wheel to help keep the wheel clean andreduce maintenance. Filter access shall be by a hinged access door with 1;4 turn latches. E. The matrix design shall have channels to reduce cross contamination between the outdoor air and the exhaust air. The layers shall be effectively captured in aluminum and stainless steel segment frames that provide a PWA MODULAR PACKAGED AIR HANDLING UNITS

65 rigid and self-supporting matrix. All diameter and perimeter seals shall be provided as part of the cassette assembly and shall be factory set. Drive belt(s) of stretch urethane shall be provided for wheel rim drive without the need for external tensioners or adjustment. F. The total energy recovery wheel shall be coated with silica gel desiccant permanently bonded without the use of binders or adhesives, which may degrade desiccant performance. The substrate shall be lightweight polymer and shall not degrade nor require additional coatings for application in marine or coastal environments. Coated segments shall be washable with detergent or alkaline coil cleaner and water. Desiccant shall not dissolve nor deliquesce in the presence of water or high humidity. G. Wheels shall be provided with removable energy transfer matrix. Wheel frame construction shall be a welded hub, spoke and rim assembly of stainless, plated and/or coated steel and shall be self-supporting without matrix segments in place. Segments shall be removable without the use of tools to facilitate maintenance and cleaning. H. Wheel bearings shall be selected to provide an L-10 life in excess of 400,000 hours. Rim shall be continuous rolled stainless steel. Wheels shall be connected to the shaft by means of taper lock hubs. I. The exhaust air fan shall be a direct drive SWSI plenum fan. The exhaust fan shall be sized for the airflow requirements per the construction schedule. The unit controller shall control the exhaust fan to maintain building pressure. A VFD shall be provided for the exhaust fan motor or the exhaust fan motor shall be an ECM motor.the rooftop unit shall have single point electrical power connection and shall be ETL listed. J. The control of the energy recovery wheel shall be an integral part of the rooftop unit's DOC controller. The DOC controller shall have visibility of the outdoor air temperature, leaving wheel temperature, return air temperature, and exhaust air temperature. These temperatures shall be displayed at the rooftop units DOC controller LCD display. All of these temperatures shall be made available through the BACnet interface. K. The rooftop unit with the energy recovery wheel shall incorporate the economizer operation. The energy recovery wheel shall have a bypass damper. When the unit is in the economizer mode of operation the energy recovery wheel shall stop and the bypass dampers shall be opened. The outdoor air shall be drawn through the bypass dampers to reduce the pressure drop of the outdoor airstream. L. The rooftop unit DOC controller shall provide frost control for the energy recovery wheel. When a frost condition is encountered the unit controller shall stop the wheel. When in the frost control mode the wheel shall be jogged periodically and not be allowed to stay in the stationary position. 2.4 EHAUST FAN A. Exhaust fan shall be a single width, single inlet (SWSI) airfoil centrifugal fan. The fan wheel shall be Class II construction with aluminum fan blades that are continuously welded to the hub plate and end rim. The exhaust fan shall be a direct drive fan mounted to the motor shaft B. The fan motor shall be a totally enclosed EC motor that is speed controlled by the rooftop unit controller. The motor shall include thermal overload protection and protect the motor in the case of excessive motor temperatures. The motor shall have phase failure protection and prevent the motor from operation in the event of a loss of phase. Motors shall be premium efficiency. C. Fan assembly shall be a slide out assembly for servicing and maintenance. D. The unit DOC controller shall provide building static pressure control. The unit controller shall provide propmtional control ofthe exhaust fans from 25% to 100% ofthe supply air fan designed airflow to maintain the adjustable building pressure setpoint. The field shall mount the required sensing tubing from the building to the factory mounted building static pressure sensor. 2.5 FILTERS A. Unit shall be provided with a draw-through filter section. The filter rack shall be designed to accept a 2" prefilter and a 4" final filter. The unit design shall have a hinged access door for the filter section. The manufacturer shall ship the rooftop unit with 2" construction filters. The contractor shall furnish and install, at building occupancy, the final set of filters per the contract documents. PWA MODULAR PACKAGED AIR HANDLING UNITS