SECTION MECHANICAL INSULATION. A. Types of insulation specified in this section include the following:

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1 SECTION PART I - GENERAL 1.01 WORK INCLUDED A. Types of insulation specified in this section include the following: 1. Piping System Insulation: a. Domestic Cold Water b. Domestic Hot water c. Heating Hot Water d. Steam and Condensate e. Chilled Water f. Storm Drains 2. Ductwork System Insulation: a. Supply Ducts b. Return Ducts 3. Equipment Insulation: 1.02 QUALITY ASSURANCE a. Backflow Device (exposed to elements) b. Chilling Equipment c. Heating Equipment A. Manufacturer's Qualifications: Firms regularly engaged in manufacture of mechanical insulation products of type, material and sizes specified. Products have been in satisfactory use in similar service for not less than three (3) years. Contractor shall supply needed documentation to support the manufacturer s qualification. B. Installer's Qualifications: Firm with at least five (5) years successful installation experience on projects with mechanical insulation's similar to that required for this project. C. Install thermal insulation products on equipment in accordance with manufacturer's written instructions and in accordance with recognized industry practices to ensure that insulation serves its intended purpose

2 D. Flame/Smoke Ratings: Provide composite mechanical insulation (insulation, jackets, coverings, sealers, mastics, and adhesives) with flame-spread rating of 25 or less and smoke-developed index of 50 or less, as tested by ASTM E 84 (NFPA 255) method. E. Building insulation shall comply with California Quality Standards for insulating material. F. Insulation material shall be certified by the California Energy Commission SUBMITTALS A. Product Data: Submit manufacturer's technical product data in accordance with requirements of Specification Section Submit manufacturer's technical product data and installation instructions for each type of mechanical insulation. Submit schedule showing manufacturer's product number, K-value, thickness, density, and furnished accessories for each mechanical system requiring insulation. Include complete description of installation methods with this submittal. B. Product Data and Maintenance Instructions: Submit in accordance with Specification Sections and requirements. PART II - PRODUCTS 2.01 PIPE INSULATION MATERIALS: A. Calcium Silicate: 1. Hydrous calcium silicate material recommended for temperatures up to 1200 F. Applied per manufacturers recommendations. 2. Cover insulation with aluminum jacket. Apply jacket to insulated surfaces per manufacturer s recommendation. Provide pre-molded insulation covering on fittings. 3. After test, insulate all fittings, valves, bonnets, strainers, etc. to a thickness equal to the adjacent piping insulation. For copper pipe trim insulation as required to suit copper line outside diameters. 4. Manufacturers: Calsilite Insulation Products, Pabco Super Caltemp, or equal B. Fiberglass Insulation: 1. Fiberglass Heavy Density 25, Johns-Manville Microlok, with ASJ-SSL jacket, or equal, with factory-applied, fire- retardant jacket and self-sealing laps, applied per manufacturer's recommendations. 2. Insulate fittings with JM Uni-Fit, or equal, pre-molded insulated covering secured with Standard fasteners. 3. Install a segment of rigid insulation at each pipe hanger for pipe sizes 2-½ and larger. 4. Finish all cold fittings with mastic and Z-tape to provide a vapor seal. 5. Insulate Victaulic couplings with a 12 long segment of Fiberglass as specified for concealed piping

3 6. Manufacturers: Johns-Manville Corporation, Owens-Corning Fiberglass Corporation, or equal DOMESTIC COLD WATER (exterior exposed to weather): A. Insulate with 4 lb. nominal density fiberglass insulation. C. Fittings 1. Piping 2 and smaller: ¾. 2. Piping 2-½ and larger: Insulate all unions, couplings, and other components in water systems with removable (replaceable) formed insulated covers. D. Insulation Jacket 1. Cover all insulation on exterior piping with 20-mil thick fire-retardant PVC jacket. Apply jacket to insulated surfaces and seal with PVC solvent-type joints. Provide pre-molded insulation covering on fittings. Piping shall be sealed vapor tight to provide a continuous moisture-proof seal DOMESTIC HOT WATER A. Insulate all domestic hot water supply and return piping with 4 lb. nominal density fiberglass insulation. 1. Piping 2 and smaller: Piping 2-½ and larger: 1-½. C. Valves and Fittings 1. Insulate all valves, unions, Victaulic couplings, and other components in hot water systems with removable (replaceable) formed insulated covers. 2. Valves installed in insulated piping lines shall have valve handle extensions to clear the insulation. Affix label for valve location and directional flow. D. Insulate domestic hot water piping and waste piping below handicapped plumbing fixtures. On all handicap fixtures that require user protection from the hot water supply and the P-trap, said items shall be covered with Skal + Gard protective devices, Truebrolav Guard. All materials used shall be fire retardant. Do not use adhesive wrapping on P-trap or angle stops/water supply risers HEATING HOT WATER A. Insulate all heating hot water supply and return piping with 4 lb. nominal density fiberglass insulation

4 1. Piping 2 and smaller: 1-½. 2. Piping 2-½ and larger: 2. C. Valves and Fittings 1. Insulate all valves, unions, Victaulic couplings, and other components in heating hot water systems with removable (replaceable) formed insulated covers. 2. Valves installed in insulated piping lines shall have valve handle extensions to clear the insulation. Affix label for valve location and directional flow. D. Insulation Jacket 1. Cover all insulation that may be exposed to water, i.e. exterior piping, mechanical room, etc. with aluminum jacket. Apply jacket to insulated surfaces per manufacturer s recommendation. Provide pre-molded insulation covering on fittings STEAM AND CONDENSATE A. Insulate steam and condensate piping with calcium silicate or high temperature mineral fiber insulation per manufacturer s recommendation. 1. Piping 1 and smaller: Piping 1-¼ to 2 : Piping 2-½ to 4 : 2-½. 4. Piping 5 and larger: 3-½. C. Valves and Fittings 1. Insulate all valves, unions, Victaulic couplings, and other components in steam systems with removable (replaceable) formed insulated covers. 2. Valves installed in insulated piping lines shall have valve handle extensions to clear the insulation. Affix label for valve location and directional flow. D. Insulation Jacket 1. Cover all insulation that may be exposed to water, i.e. exterior piping, mechanical room, etc. with aluminum jacket. Apply jacket to insulated surfaces per manufacturer s recommendation. Provide pre-molded insulation covering on fittings

5 2.06 CHILLED WATER A. Insulate exposed and concealed chilled water supply and return piping with 4 lb. nominal density fiberglass insulation. 1. Piping 1 and smaller: Piping 1-¼ and larger: 1-½. C. Valves and Fittings 1. Insulate all valves, unions, Victaulic couplings, and other components in chilled water systems with pre-molded removable (replaceable) insulated covers. 2. Valves installed in insulated piping lines shall have valve handle extensions to clear the insulation. Affix label for valve location and directional flow. D. Insulation Jacket 2.07 DUCTWORK 1. Cover all insulation that may be exposed to water, i.e. exterior piping, mechanical room, etc. with 20 mil thick fire-retardant PVC jacket. Apply jacket to insulated surfaces and seal with PVC solvent-type joints. Provide pre-molded insulation covering on fittings. Piping shall be sealed vapor tight to provide a continuous moisture-proof seal. A. All ductwork insulation to be exterior only. Wrap all supply and return ductwork and sound traps, unless indicated or specified otherwise, with 1-½ thick, 1-pound density Fiberglas 100P, Johns-Manville, or equal, no known equal, fiberglass duct insulation lapped four inches and held in place by 16-gauge galvanized wire tied on 12 centers. B. Apply adhesive to entirely cover the circumference of ducts to prevent sagging of insulation before wrapping insulation around ducts. C. For rectangular ducts exceeding 24 in width, provide mechanical fasteners on bottom of duct at maximum spacing of 18 c.c. Fasteners shall be weld pins or clinch pins: adhesive type pins shall not be used. D. Cover all ductwork that may be exposed to water, including the mechanical room, with fiberglass, and protect with a sealant adhesive, Foster SEALFAS, Hardcast Flex-Grip, Childers Chil-Perm or equal. All products used must have a flame spread rating of less than 25 or be rated as a composite system with a flame spread rating of less than 50. E. Cover all standing seams and transverse joints in all ductwork with a sealant adhesive before insulating to assure airtight joints. F. Pressure-sensitive tapes shall not be used. G. Manufacturers: Certain Teed Corporation, Johns-Manville Corporation, Owens-Corning Fiberglas Corporation, or equal

6 2.08 BACKFLOW DEVICES (exposed to elements) A. On exterior Backflow Assemblies Insulating Pad B. Insulation - 2" TIW fiberglass blanket C. Jacketing - Silicone glass cloth (15 oz minimum -both sides with silicone) D. Lacing Hooks - Stainless steel E. Lacing Wire - Stainless steel F. Pad seam attachment - Sewn with glass thread only, or equal, no known equal. G. Execution: Both the interior and exterior of the pad shall be silicon glass cloth. The pad is to be custom fit tight to the backflow preventor. Toaster cover design is not acceptable. Construct pad with seam at bottom to allow drainage CHILLING EQUIPMENT A. Insulate water-chilling equipment, including chilled water pump bodies, air separators, chillers, expansion tanks, etc., operating at reduced surface temperatures and which do not have factory-applied, low-temperature insulation. B. Insulation shall be 3 thick, 3-lb. density fiberglass board. C. Apply a 1-½ galvanized hexagonal mesh netting, stretched tight and securely fastened to the insulation, and cover with two coats of hard finish insulating cement to a total minimum thickness of ½. Leave the first coat with a rough surface and allow to dry before the second coat is applied. Trowel the second coat smooth, and finish with 8-ounce canvas jacket, tightly pasted on with lagging adhesive. D. Provide a light coat of dilute adhesive followed by two heavy coats of Fosters 30-36, or equal, no known equal, at the rate of 60 square feet per gallon over the entire surface of the canvas jacket. After this sealant has dried, apply Foster 30-35, or equal, no known equal, vapor barrier coating at the rate of 50 square feet per gallon. E. Manufacturers: CertainTeed Corporation, Johns-Manville Corporation, Owens-Corning Fiberglas Corporation, or equal HEATING EQUIPMENT A. Cover the hot water equipment including heat exchangers, air separators, etc. with 3 calcium silicate or high temperature mineral fiber blocks, securely wired on. B. Apply a 1-½ galvanized hexagonal mesh with two coats of hard-finish, all-purpose cement to a total minimum thickness of ½. The first coat shall be left with a rough surface and allowed to dry before the second coat is applied. The second coat shall be troweled smooth and finished with 8-ounce canvas jacket, tightly pasted on with lagging adhesive. C. The entire surface of the canvas jacket shall have a finish sizing consisting of one brush coat of dilute adhesive. D. Do not insulate expansion tanks and hot water pump casings

7 E. Manufacturers: CertainTeed Corporation, Johns-Manville Corporation, Owens-Corning Fiberglas Corporation, or equal. PART III - EXECUTION 3.01 INSTALLATION OF PIPING INSULATION: A. Install insulation products in accordance with manufacturer's written instructions and in accordance with recognized industry practices to ensure that insulation serves its intended purpose. B. Install insulation on pipe systems subsequent to testing and acceptance of tests. C. Install insulation materials with smooth and even surfaces. Insulate each continuous run of piping with full-length units of insulation, with single-cut piece to complete run. Do not use cut pieces or scraps abutting each other. D. Clean and dry pipe surfaces prior to insulating. Butt insulation joints firmly together to ensure complete and tight fit over surfaces to be covered. E. The term "piping" used herein shall include pipe, valves, strainers, and fittings. Apply insulating cements to fittings, valves, and strainers, and trowel smooth to the thickness of adjacent covering. Covering on valves shall extend up to the bonnet. The covering cement shall be of the types herein specified. F. Extend piping insulation without interruption through walls, floors, and similar piping penetrations, except where otherwise indicated. G. Install pipe hangers on the outside of the insulation and not in contact with the pipe. Protect insulation as hereinbefore specified under Hangers and Supports. H. Neatly taper raw ends of insulation and seal with canvas and sealant as noted for fittings INSTALLATION OF DUCTWORK INSULATION A. Install insulation products in accordance with manufacturer's written instructions and in accordance with recognized industry practices to ensure that insulation serves its intended purpose. B. Extend ductwork insulation without interruption through walls, floors, and similar ductwork penetrations, except piping through fire walls and where otherwise indicated. C. Exposed high-velocity ductwork shall be wrapped. Insulation shall be same as for concealed ducts but applied using butt joints with adhesive over entire surface of duct. Apply 6-ounce canvas jacket and two finish coats of undiluted adhesive to exterior. Covering shall be even and level without lumps INSTALLATION OF EQUIPMENT INSULATION A. Install insulation materials 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 gapping joints and excessive voids resulting from poor workmanship. B. Do not apply insulation to equipment, while hot

8 C. Do not insulate ASME stamps, or manufacturer's nameplate. Provide neatly beveled edge at interruptions of insulation. END OF SECTION