907.
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AutoCAD SHX Text
SECTION 15010 - GENERAL MECHANICAL 1. WORK INCLUDED: The work consists of furnishing labor, WORK INCLUDED: The work consists of furnishing labor, equipment, and materials in accordance with the specifications or drawings, or both, together with any incidental items not shown or specified which can be reasonably inferred or taken as belonging to the work and necessary in good practice to provide a complete system described or shown as intended. Equipment installed shall be identical and of equal quality as specified. See division 1 specifications for additional information and requirements. 2. CODES AND REGULATIONS: All work hereunder shall be CODES AND REGULATIONS: All work hereunder shall be strictly in conformance with 2012 International Building, Mechanical and Uniform Plumbing Codes, State or Alaska City and Borough of Ketchikan Modifications and Requirements, 2012 National Electric Code and applicable codes, and regulations. All electrical equipment shall bear the U.L. label. 3. DATA REQUIRED: Furnish approval data for items where DATA REQUIRED: Furnish approval data for items where data is required. Not less than three copies of such data shall be furnished to the Owner for approval. Other or additional data, as the Owner may deem necessary, shall also be provided when requested. Approval of the data shall not eliminate responsibility for compliance with the drawings or specifications unless specific attention has been called in writing to proposed deviations at the time of transmittal of the data and such deviations have been approved, nor shall it eliminate the responsibility for freedom of errors of any sort in the data. 4. AS-BUILT DRAWINGS: All changes shall be noted on a set AS-BUILT DRAWINGS: All changes shall be noted on a set of full-sized contractor redline prints as data for later preparation of as-built drawings. The prints marked for as-built conditions shall be delivered to the Owner prior to the Contractor's application for final payment. 5. ELECTRICAL WORK: Includes control wiring for electrical ELECTRICAL WORK: Includes control wiring for electrical equipment specified herein. Wiring from equipment power inlet, or from outlets provided in the ELECTRICAL division. Such wiring provided as required whether shown on the drawings or not. Work in accordance with the ELECTRICAL specifications and applicable codes and the National Electrical Code NFPA 70. Conductors to be copper only. Low voltage control wiring in accessible areas in conduit or otherwise protected. All conduit and wiring in finished spaces shall be concealed unless approved otherwise by the Owner. Low voltage wiring to be 18 AWG minimum. 6. OPERATING AND MAINTENANCE DATA: The following data OPERATING AND MAINTENANCE DATA: The following data shall be provided to the Owner for approval prior to the request for final inspection. Required are three copies of manufacturers' instructions for operation and maintenance of all mechanical equipment and specialties, including replacement parts lists, capacity curves or charts, equipment data sheets, manufacturers' literature on the equipment, and as-built wiring diagrams and control drawings, all suitable for side binding to 8-1/2 x 11 inch size. All data not applicable to the job is to be crossed out or deleted. At the completion of the work and after receipt of the data from the Contractor, the preparation of the operating and maintenance instructions shall be done. Guide documents available to Contractor upon request. 7. PAINTING: Exposed pipe threads in all ferrous piping PAINTING: Exposed pipe threads in all ferrous piping thoroughly cleaned and painted one coat of rust-preventive paint immediately after installation. Dampers and inside of all ducts visible through grilles painted one coat of flat black. All steel outside and above roof painted two coats of aluminum rust-preventive paint. 8. ADJUSTING SYSTEMS: At the completion of the work, the ADJUSTING SYSTEMS: At the completion of the work, the adjustment of the air movement systems in Work Area shall be performed by the Contractor. The adjusting will be done with instruments by persons or a firm experienced in the work, and approval by Owner of the personnel performing the adjustment must be obtained previous to adjustment. A resume' of the experience and background of the personnel proposed to do the adjusting is required. Logs will be recorded of all of the adjustment data and given to the Owner for approval at the completion of the adjustment. Adjusting systems shall include balancing air systems to within 10% of design flow at minimum outside air condition. Measure and record air volumes at minimum OSA and full OSA conditions. After the completion of the final adjustments and approval thereof, position of each adjusting fitting and damper marked to indicate the proper setting and locked in the adjusted position as maximum open position. 9. CLEANING SYSTEMS: Equipment, piping, and ductwork CLEANING SYSTEMS: Equipment, piping, and ductwork thoroughly cleaned of material cuttings and refuse. After the systems are installed complete, they shall be cleaned as follows: Domestic water piping flushed with clean water. See DISINFECTION in Section 15400. Ventilating and heating air systems shall not be operated under any circumstances unless filters are in place. If a system is found to have operated without its filter in place, the Contractor shall clean all affected ductwork and equipment as approved by the Owner. Ventilation systems shall not be used for heat or ventilation of spaces under construction. Temporary caps to be installed on ductwork in Work areas. Any ductwork not properly protected or used during Construction for ventilation shall be cleaned to the Owner satisfaction at Contractor's expense. SECTION 15050 - BASIC MATERIALS AND METHODS 1. DOMESTIC WATER PIPE AND FITTINGS: Above ground mains DOMESTIC WATER PIPE AND FITTINGS: Above ground mains to be hard-drawn copper tubing, FS WW-T-799d, Type L, Class 1, with copper solder fittings. Brass IPS nipples on connections to plumbing fixtures. Individual fixture piping shall be from cold and hot water manifolds with PEX tubing to individual connections to fixture. Similar to Viega Aqua Pex. 2. WASTE AND VENT: Above ground to be no-hub coated WASTE AND VENT: Above ground to be no-hub coated cast-iron pipe and fittings, CISPI Standard 301-72, or Schedule 40 galvanized steel with coated cast-iron drainage fittings. 3-inch and larger with heavy duty couplings. Alternate material Schedule 40 ABS acceptable upon approval of Owner. 3. UNIONS: In steel pipe, galvanized in galvanized pipe, UNIONS: In steel pipe, galvanized in galvanized pipe, otherwise black steel. In copper tubing, red brass or bronze. Installed in piping connections to all equipment, and where shown or required, arranged to facilitate removal or replacement of equipment. 4. PIPE SUPPORTS: Horizontal piping with individual hangers PIPE SUPPORTS: Horizontal piping with individual hangers with supports spaced not more than 10 feet on center and not more than 2 feet either side from each change in direction. Supports for copper tubing 1-1/2 inch and smaller, spaced not more than 6 feet and 1 foot from each change in direction. Support for no-hub at each joint and not more than 5 feet on center. Adjustable, malleable-iron or strap steel ring-type hangers for 3 inch and smaller pipe, similar and equal to Grinnell 70. Steel clevis type for 3-1/2 inch and larger pipe, similar and equal to Grinnell 260. Copper-plated hangers for copper tubing, where hanger is in contact with the pipe similar and equal to Grinnell CT-99 or CT-269. Vertical piping adjacent to walls supported by means of brackets formed of straps bolted to wall, and U-bolt clamps around pipe, with pipe held 2 inches out from wall. Support material to be steel on steel pipe and copper-plated on copper pipe. Ring hangers for domestic cold water installed outside of insulation, with 20-gage steel protecting half-sleeve on bottom, 8 inches long. Hanging from wood members or decking less than 1-1/2 inch thick not permitted. Piping installed with space provided for insulation. 5. SYSTEM VALVES: 125 psi working pressure. Gate, unless SYSTEM VALVES: 125 psi working pressure. Gate, unless shown or specified otherwise. Check valve of horizontal swing type, with renewable composition disc. Globe valve for water, with renewable composition disc. All valves of one manufacture unless specified otherwise. For 2 inch and smaller, all bronze, threaded. Gate type to be wedge disc, FS WW-V-54c, Type 1. Globe and swing check type to be FS WW-V-51d. For 2-1/2 inch and larger, cast-iron, brass-mounted, flanged. Gate to be FS WW-V-58b, Type 1. Rising stem type where indicated on the drawings. Globe and check valves of equal quality materials and workmanship. Ball valves may be used in lieu of gate valves. Drain valves to be 1/2” valve in 1/2” valve in 1/2” piping, otherwise 3/4 inch. Globe valve as specified above, with 3/4 inch male hose end adapter, similar to Powell 526. Gage cocks with 1/4 inch globe valves as specified above. All swing check valves installed in the horizontal position. Valves at equipment connections are to be same size as connecting piping. Valves isolating automatic valves that have connections smaller than the connecting pipe size shown are to be the same size as the connecting piping. Valve stems positioned horizontal or above horizontal. 6. DUCT THERMOMETERS (STEM TYPE): 4-inch diameter head, DUCT THERMOMETERS (STEM TYPE): 4-inch diameter head, with sensitivity and range of element suitable for system conditions. Adjustable angle type, located for ease of reading. With micrometer pointer or means of calibration. Stem 24” long or to be midpoint of air stream. long or to be midpoint of air stream. 7. PIPE-MOUNTED THERMOMETERS: Adjustable angle cased PIPE-MOUNTED THERMOMETERS: Adjustable angle cased type with straight-scale, red-reading lens tube. With separable socket and encased bulb. With 3/4-inch male NPT connection. 7 inch nominal case length, with narrow case, 30 to 240F range and 2F scale divisions. Installed with a minimum of 1/2 inch of bulb in the flow. 8. PRESSURE AND ALTITUDE GAGES: 4-1/2 inch nominal PRESSURE AND ALTITUDE GAGES: 4-1/2 inch nominal diameter, bourdon-tube type, with white dial, black numerals, and 1/4 inch male NPT connection. Pressure or compound type, for pipe mounting. With overall accuracy of 1.5 percent with one percent in the middle half of the scale, and with means of adjusting the pointer without removal from its shaft, either by internal adjustment screw or adjustable pointer. 0-150 psi and 0-345 ft. combination pressure and altitude, with 2 psi graduations for domestic water systems. 9. WATER METER: Furnished and installed by the Contractor. WATER METER: Furnished and installed by the Contractor. 2-inch, turbine type. Coordinate with local public works requirements. With automatic reading billing unit for remote reading. Graduated in gallons. Manufacture: Neptune with ARB unit. Installed where shown, set on wall shelf. Remote ARB unit mounted where shown with required wiring to the meter. SECTION 15200 - VIBRATION AND SEISMIC CONTROL 1. VIBRATION ISOLATION: Deadening pads between the channel VIBRATION ISOLATION: Deadening pads between the channel frame AHU support and the floor. Platform type with leveling adjustment, with isolator base secured to the floor. Minimum of ½-inch thick. Manufacture: Vibration eliminator Co., Vibration Mountings, Korofund, Mason. SECTION 15250 - INSULATION 1. PIPE AND EQUIPMENT INSULATION: All piping insulation PIPE AND EQUIPMENT INSULATION: All piping insulation must have a flame spread/smoke developed rating of 25/50 or less per ASTM E-84. A. Sectional pipe covering: Mineral fiber: 1-1/2 inch Sectional pipe covering: Mineral fiber: 1-1/2 inch Mineral fiber: 1-1/2 inch thick up to 2 inch IPS. FS HH-I-558b, Form D, Type III, Class 12, with all-purpose flame retardant jacket. B. Safety covers below ADA plumbing fixtures: Safety covers below ADA plumbing fixtures: Manufactured safety cover insulation kits are acceptable. Similar and equal to Plumberex Handy Shield, Specialty Products, or Truebro Inc. Lav-Guard kits. Installed on ADA compliant lavatories and sink. C. Application: Exposed plumbing fixture runouts, piping Application: Exposed plumbing fixture runouts, piping in sleeves, nameplates, access openings, and code openings, and code stamps not insulated. All other equipment, fittings, and piping above ground, including unions, flanges, ground, including unions, flanges, and valve bodies, insulated as follows: D. SCHEDULE: SCHEDULE: 1. Domestic cold water, hot water, hot water recirculating, Domestic cold water, hot water, hot water recirculating, heating piping, vent piping: Mineral fiber. 2. Exposed hot and cold water and waste on lavatories for Exposed hot and cold water and waste on lavatories for handicapped: 1/2 inch thick foamed plastic. foamed plastic. A. Installation: By skilled appliers directly in the employ Installation: By skilled appliers directly in the employ of a firm specializing in this type of work. Placed work. Placed after the entire system has been tested and approved, unless otherwise approved by the Owner approved by the Owner for each section of piping. 3. DUCT INSULATION: DUCT INSULATION: A. Includes outside, outside air and exhaust ducts to Includes outside, outside air and exhaust ducts to louvers, relief air ducts. Ducts insulated with 1-1/2 inch thick glass-fiber blanket having a minimum density of 1 pound per cubic foot, with the addition with the addition of vapor barrier facing on outside, applied at the factory. Facing to consist of aluminum foil laminated aluminum foil laminated to a sheet of flame-resistant 30 pound paper with glass-fiber reinforcing mesh between. mesh between. B. Closed Cell Elastomeric Duct Wrap, 1-inch thick min. Closed Cell Elastomeric Duct Wrap, 1-inch thick min. R4.2. Supply Air Duct Liner and wrap Insulation; Black Supply Air Duct Liner and wrap Insulation; Black flexible Closed cell fiber free thermal and acoustical insulation for ducts. Approved antimicrobial protection. 25/50 Flame Spread and Smoke Developed index, suitable for return air plenum use. North American made. Install with required adhesive and per manufacturers requirements. Equal to AP Armaflex Wrap all supply air ductwork with 3/4 inch thick minimum R3.1 insulation assembly, cover all exposed ductwork. Install 1 inch thick duct liner inside all return air boots and the AHU connected return air ductwork. C. Installed by skilled appliers directly in the employ of Installed by skilled appliers directly in the employ of firms specializing in this type of work. Access doors Access doors and panels not insulated outside, and to be accessibly at all times. Installed with butt joints. butt joints. All holes, tears, and joints neatly patched as required with facing material, to provide a continuous, provide a continuous, unpunctured vapor-barrier. SECTION 15400 - PLUMBING SYSTEMS 1. WATER PIPING: Arranged to permit drainage to equipment, WATER PIPING: Arranged to permit drainage to equipment, mechanical room, or fixtures, pitched at 1/4 inch per 10 feet. Drain valves installed at all low points on mains. Exposed pipes run straight and parallel to building walls. Risers plumb and true. No caulking of joints in steel or copper pipe or of any equipment permitted. Interior of all piping clean before installation. After piping installation and before final connections to branches, risers, or fixtures, piping, including branches and risers, washed out with water. Piping installed with space provided for insulation. All piping to plumbing fixtures anchored solid at the wall to prevent movement in any direction. Type K, copper tube used for underground water piping connection to trap primers. 2. DRAINAGE PIPING: Service weight cast iron soil, waste, DRAINAGE PIPING: Service weight cast iron soil, waste, and floor drainage piping run as shown, with grades not less than 1/4 inch per foot. Vent piping pitched 1/4 inch per 10 feet. All fittings shall conform to the requirements of the 2009 edition of the Uniform Plumbing Code. All fixtures individually vented. No horizontal vent less than 6 inches above the overflow line of the fixture served except as shown for floor drain vents below grade. All fixtures vented within 3 feet of the fixture. 3. JOINTS IN PIPING: Cast-iron drainage piping: Neoprene JOINTS IN PIPING: Cast-iron drainage piping: Neoprene ring joint, special double seal ring used with bell-and-spigot pipe made specifically for use of ring. Manufacturers' lubricant used for installation. Similar and equal to Tyler Tyseal joint. Used in buried piping. No-hub couplings with special neoprene gasket and cast-iron coupling with stainless steel bolts, MG coupling, or stainless steel Clamp-All or Anaco Husky Series 4000 coupling. Used above ground only. Above ground with flanged joint, 125 psi flanges welded to pipe, with suitable gaskets. Threaded piping with clean-cut threads to standard lengths. Joints made up with pipe compound, applying compound to male threads. Copper tubing cut to exact length with pipe cutter, to an even, square cut. Use of hacksaw prohibited. Solder composed of 95 percent tin and 5 percent antimony or Silvabrite 100. Joints underground silver brazed. Self-cleaning flux not allowed. Caulking of joints in threaded pipe or addition of solutions or chemicals to the system to prevent leakage in joints not permitted. Chrome-plated brass P-traps and drain pipes connected to system drainage with approved brass adapter with tapered joint with Teflon, brass, or lead tapered ring and slip nut. Propress type compressions fittings allowed. 4. PIPING TESTS AND DISINFECTION: Enclosed piping tested PIPING TESTS AND DISINFECTION: Enclosed piping tested before concealing. Equipment, gages, controls, and thermometer wells suitably protected during tests. Tests made in the presence of the Owner. Perform tests required per 2012 Uniform Plumbing Code and local authorities. Provide test results to owner. Submitted written report of testing and disinfection in O&M Manuals. SECTION 15450 - PLUMBING FIXTURES AND TRIM 1. All fixtures to be of one manufacture unless specified All fixtures to be of one manufacture unless specified otherwise. All exposed metal parts of fixtures, trim, and supplies to be polished chromium-plated unless specified otherwise. Escutcheons at wall on all exposed piping. With hot water at left, and cold water at right, and indexed handles. All sink and lavatory supply spouts with aerators. Wall-hung fixtures, secured to structural elements by means of concealed brackets or hangers. Bracing or blocking provided as required to provide solid support. Wall brackets and bolts for institutional type fixtures with sufficient strength to prevent movement of fixture when subjected to a force of 200 pounds in any direction. All supply piping to fixture anchored at wall. Accurately plumb, horizontal, and in line. Wall-hung fixtures fitted uniformly to finished surfaces all around. SECTION 15500 - FIRE PROTECTION 1. AUTOMATIC SPRINKLER SYSTEM: Revise existing wet AUTOMATIC SPRINKLER SYSTEM: Revise existing wet system. The automatic sprinkler system shall consist of a complete wet for coverage of all combustible areas of the building, including areas above the suspended ceilings, stairs, under ducts, cold attic spaces, storage spaces, and occupied spaces. All piping is to be installed concealed in all areas with suspended ceilings. Wall, floor, and ceiling plates are required on all exposed piping in finished areas. 2. CODES AND STANDARDS: All portions of the automatic CODES AND STANDARDS: All portions of the automatic sprinkler system shall comply with the applicable sections of the State of Alaska codes and be approved by the Fire Marshall. The sprinkler system shall be designed and installed in accordance with NFPA 13 for a light hazard occupancy for office areas, and ordinary and extra hazard occupancies as required. The location of sprinkler heads shall conform to NFPA 13. 3. AUTOMATIC SPRINKLER EQUIPMENT: All apparatus shall AUTOMATIC SPRINKLER EQUIPMENT: All apparatus shall conform in all respects to the requirements of the codes having jurisdiction, and bear the listing mark of the Underwriters Laboratories, Inc. Unless specified otherwise, selected from the following: Grinnell, Viking, Central, Reliable, Star Sprinkler Corp. 4. SPRINKLER HEADS: Bronze body. Normally to release at SPRINKLER HEADS: Bronze body. Normally to release at 165F, or as required by location. For a dry and wet pipe systems. Upright, pendent, and sidewall type fusible link or bulb type. Recessed type installed in all finished areas. Fusible link or bulb type. Polished chrome finish, with ceiling ring. Minimum projection with only deflector and link exposed. Heads installed with uniform projection of deflector below ceiling ring. Exact location coordinated with the structure, lighting, ductwork, ceiling pattern, and obstructions. Escutcheons on all piping and heads in finished areas. 3 spare heads furnished of each kind used. All spare heads and wrenches in a metal cabinet located on the wall in the mechanical room adjacent to Sprinkler Header. Manufacturer's literature required showing make, model, type, dimensions, and rating. 5. PIPING, VALVES, AND FITTINGS: ASTM A-135. 2-1/2-inch PIPING, VALVES, AND FITTINGS: ASTM A-135. 2-1/2-inch and larger, black steel Schedule 10 pipe. 2-inch and smaller, Schedule 40 or as approved by the Owner. With black malleable or 125 psi cast-iron fittings, suitable and approved for sprinkler systems. Threaded joints, or grooved type mechanical joint fittings. Couplings to consist of two malleable iron couplings with gasket, standard weight, Victaulic Style 75 or 77, bolted in accordance with ASTM A183-60. Threaded fittings used on all connections less than 2 inches. Use of saddle clamp fittings, hooker fittings, poz-lok, smooth bore fittings, cut groove fittings, or plain end fittings not allowed. 6. PIPE SUPPORTS: Individual hangers as specified in Section PIPE SUPPORTS: Individual hangers as specified in Section 15050 except trapeze hangers may be used under ducts and similar obstructions. Supports spaced in accordance with NFPA 13. Steel hanger rods, cadmium or zinc-plated, with continuous thread, of size as required by NFPA-13. 7. SPRINKLER PIPING TESTS: All tests as required by NFPA, SPRINKLER PIPING TESTS: All tests as required by NFPA, performed in the presence of the Owner. Hydrostatic test not less than 200 psi for two hours, or at 50 psi in excess of the maximum static pressure when the maximum static pressure is in excess of 150 psi. No visible leakage. If danger of freezing exists, the system may be tested with not less than 40 psi air pressure for 24 hours, with not more than 1-1/2-psi drop in pressure. System must be hydrostatically tested again when weather permits. Alarm valves, pressure switches and gages, and all equipment not rated for the test pressure protected from damage during test. Leaks developing during the tests corrected, and system retested until a perfectly tight job is obtained. 8. AUTOMATIC SPRINKLER SYSTEM SHOP DRAWINGS: Revise AUTOMATIC SPRINKLER SYSTEM SHOP DRAWINGS: Revise existing system. Scale drawings required of the sprinkler head layout and piping systems, showing type and release temperature for each head, headers, valves, drains, test valves, drain valves, pipe sizes, fittings, elevations of piping, alarms, wet pipe valve, supports and bracing, location of all surface-mounted lights, diffusers, and obstructions, and installation details, approved before start of installation. Final drawings approved by the City of Ketchikan Fire Marshall. Two sets of as-built drawings turned into owner at completion of the job. SECTION 15780 - AHU 1. Manufacturer: DAIKIN Manufacturer: DAIKIN 2. Configuration: Description: Custon Air Handler with Supply Configuration: Description: Custon Air Handler with Supply and Return Fans, Filter Section with Mixing Damper, Electric Heating Coil. Configuration as shown on the drawings ETL listed. 3. Construction Requirements: Construction Requirements: A. Casing: Inner/outer panels heavy gage G90 Casing: Inner/outer panels heavy gage G90 construction. 2-inch thick foam insulation, R-13. B. Fans: Plenum class II. Belt driven. Fans: Plenum class II. Belt driven. C. Heat: Electric coil, separate power connection. Heat: Electric coil, separate power connection. 208volt, 30KW. 0-10V control Signal. D. Cooling: DX coil, nominal 100MBH. Exterior condenser. Cooling: DX coil, nominal 100MBH. Exterior condenser. E. Filters: 2-inch thick MERV 14. Filters: 2-inch thick MERV 14. SECTION 15810 - AIR DISTRIBUTION 1. SHEET METAL: All sheet metal fabricated of galvanized SHEET METAL: All sheet metal fabricated of galvanized steel with construction and installation per latest edition of SMACNA. All joints sealed with mastic joint sealant. Minimum 24 guage sheet metal thickness. SECTION 15830 - POWER VENTILATORS 1. Wall Mounted Exhaust Fans (EF-2, EF-3): Centrifugal Fan Wall Mounted Exhaust Fans (EF-2, EF-3): Centrifugal Fan Unit: Direct driven with galvanized steel housing and scroll, resilient mounted motor, round outlet duct with gravity backdraft damper in discharge. Wall sleeve. Disconnect Switch: Cord and plug in housing for thermal overload protected motor and wall mounted switch. SECTION 15850 - AIR INLETS AND OUTLETS 1. Ceiling Supply Diffusers: Similar to Titus, Model TDCA-AA. Ceiling Supply Diffusers: Similar to Titus, Model TDCA-AA. Type: Surface mount type for hard ceilings. Removable Core. Louver size as shown on plans. Round neck with size as shown on drawings. Diffusers: Movable vanes, accessible from face to adjust discharge from horizontal to vertical. Core for discharge pattern of four-way corner blow. Diffusers are four-way blow unless otherwise shown on schedule. Frame: Surface type border for hard ceilings. Coordinate with ceiling plans for border type. Fabrication: Aluminum with white baked enamel finish. 2. Exhaust and Return Grilles: Similar to Titus, Model 350FL. Exhaust and Return Grilles: Similar to Titus, Model 350FL. Type: Ceiling and wall return/exhaust grille. Face: Blades with 3/4 inch spacing, 35 degree deflection, blades parallel to long dimension. Frame: 1-1/4 inch margin with countersunk screw mounting. With sponge rubber gaskets under flanges. Fabrication: Aluminum. White baked enamel finish. 3. Louvers: Similar to Ruskin, Model ELF6375 DX, Type: Louvers: Similar to Ruskin, Model ELF6375 DX, Type: 3-inch deep with vertical wind-driven rain resistant stationary louver. Welded construction. Drainage blade type for rain applications. Blades 3/4-inch on center. 1/2-inch mesh bird screen aluminum construction. Extended sill. Kynar finish with 10 year warranty. Wind load of 20-lbs per sq. ft. Class A effectiveness. Size: See plans. To be installed in existing construction. Color: To be selected by ARCHITECT from manufacturer's standard range. SECTION 15900 - MECHANICAL CONTROLS 1. CONTROLS: Electric and Direct Digital Controls. CONTROLS: Electric and Direct Digital Controls. Coordinate with Owner on requirements. A. Air Handling Units (AHU-1) Packaged direct digital Air Handling Units (AHU-1) Packaged direct digital controls for AHU (SF, RF) operation, heating coil/AV, mixing box dampers (OAD and RAD), and relief air (EAD) control. 2. Return air duct thermostat reset from space thermostat and Return air duct thermostat reset from space thermostat and outside air thermostat for heating and cooling conditions, modulating between adjustable 68F (heating) and 74F (cooling) space temperature setpoints and 30F and 70F outside air temperatures respectively. Supply air control to modulate mixing dampers first to maintain duct setpoint then to modulate electrical heating coil in stages or engage exterior air-conditioning cooling system to maintain return air setpoints. Dampers to modulate from a minimum outside air position to full open with return air damper operating the opposite cooperatively with RAD closed when OAD is full open. . 3. EAD controlled by space pressure sensor and outside air EAD controlled by space pressure sensor and outside air pressure sensor. 4. AHU-1 to operate from an occupied/unoccupied schedule. AHU-1 to operate from an occupied/unoccupied schedule. Coordinate with Owner and Tenants on schedule requirements. 5. Provide variable frequency drives (VFD) for AHU-1 (SF&RF) Provide variable frequency drives (VFD) for AHU-1 (SF&RF) hereunder. 6. Exhaust Fans: EF-2 & EF-3 to operate whenever AHU-1 Exhaust Fans: EF-2 & EF-3 to operate whenever AHU-1 operates. 7. Relief Air: Provide relief air control for AHU-1. Space Relief Air: Provide relief air control for AHU-1. Space pressure sensor as compared to outside air to modulate the respective AHU EAD to maintain a space pressure, initially set at positive 0.02" wg., Calibrate actual setting during controls startup and testing and Balancing of ventilation systems. 8. Provide Open Protocol type Direct Digital Controls with Provide Open Protocol type Direct Digital Controls with human interface with touch screen manipulation of settings, display of parameters, and scheduling of operating times. Provide connection to internet for access. Installing company must have minimum 3 years experience and have a service office in Juneau or Anchorage, Alaska. 9. Provide Startup by qualified technician. Provide 4 hours of Provide Startup by qualified technician. Provide 4 hours of training to owner by same technician. 10. Return Fan Speed: Pressure sensor at outlet of return Return Fan Speed: Pressure sensor at outlet of return fan to modulate return fan VFD to maintain an adjustable -0.01 in-wg. 11. Cooling system will be enabled above outside air Cooling system will be enabled above outside air temperature 55F (Adjustable). DX cooling coil solenoid valve shall modulate to provide necessary cooling. CCU shall operate for minimum 10 minutes. 12. Verify, adjust, and set air volumes with Testing and Balancing Verify, adjust, and set air volumes with Testing and Balancing Contractor onsite. Record in as-built information and field reports. END OF SPECIFICATIONS