邢唷��>� OQ��N��欹�_ ��4bjbjzyzy MK6b6b�+1��b b ��8*$N4��*��(��:�t3<�=*?*?*?*?*?*?*$�+�l.�c*�o��ooc*��x*�"�"�"o��=*�"o=*�"�":A(� )��瘥鯸嘅��Ev�( )*�*0�*) 6/��6/ )6/� )oo�"oooooc*c*]!�ooo�*oooo��6/ooooooooob B�: SECTION 22 35 23 - semi-instantaneous domestic water heaters (hot water) GENERAL RELATED DOCUMENTS Drawings and general provisions of the Contract, including General Conditions and Division�01 Specification Sections, apply to this Section. Specifications throughout all Divisions of the Project Manual are directly applicable to this Section, and this Section is directly applicable to them. SUMMARY This section covers providing all labor and materials for the complete first class installation of domestic semi-instantaneous hot water to domestic hot water generating systems indicated and scheduled on Contract Drawings complete with all equipment, controls, piping, valves, accessories, testing, start-up and other normal parts that make the systems complete, operable and acceptable to the authorities having jurisdiction. REFERENCE STANDARDS The latest published edition of a reference shall be applicable to this Project unless identified by a specific edition date. All reference amendments adopted prior to the effective date of this Contract shall be applicable to this Project. All materials, installation and workmanship shall comply with the applicable requirements and standards addressed within the following references: 2015 Edition of the International Plumbing Code. Conform to ASME Section VIII Division 1 for manufacture of pressure vessels for heat exchangers. Underwriters Laboratories Listings QUALITY ASSURANCE Perform Work in accordance with State of Texas Department of Health Standards. Water heaters shall be manufactured by a company that has achieved certification to the ISO 9001 International Quality System. Provide equipment with manufacturer's name, model number, and rating/capacity permanently identified. Ensure products and installation of specified products are in conformance with recommendations and requirements of the following organizations: National Sanitation Foundation (NSF). American Society of Mechanical Engineers (ASME). National Board of Boiler and Pressure Vessel Inspectors (NBBPVI). National Electrical Manufacturers' Association (NEMA). Underwriters Laboratories (UL). SUBMITTALS Product Data: Provide manufacturer抯 recommended piping arrangement diagram. Include dimension drawings of water heaters indicating piping, components and required connections, size of tappings, drains, anchors, lifting points and attachments. Manufacturer's data sheets and installation instructions. Provide wiring diagrams, electrical characteristics and connection requirements. Record Documents: Provide full written description of manufacturer抯 warranty. Operation and Maintenance Data: Include operation, maintenance, and inspection data, replacement part numbers and availability, and service depot location and telephone number. DELIVERY, STORAGE and HANDLING Provide temporary inlet and outlet caps. Maintain caps in place until installation. Do not operate the hot water generator for any reason until the factory startup service has been completed. warranty Tank Warranty: Generator tanks shall have a minimum of an eight (8) year warranty to protect the Owner against defects in material and workmanship, discolored water or tank perforation due to erosion and corrosion. Should the tank or liner fail for any reason with the first eight full years after startup, the manufacturer shall, at the Owner抯 option, pay for all repairs or replacement, including material, labor, incidental costs, and freight. The tank warranty must be submitted with the total package submittals. The submission of any submittal with a warranty less than that described or the absence of a warranty with the submittal, will be sufficient cause for complete submittal rejection. Heat Exchanger Warranty: The heat exchanger shall have a minimum of a three (3) year warranty against material and workmanship, corrosion and erosion, thermal shock, and fouling. All material, labor freight, and incidental expenses shall be the responsibility of the manufacturer should the warranty be exercised. The heat exchanger warranty must be submitted with the total package submittals. The submission of any warranty less than that described of the absence of a warranty with the submittal, will be sufficient cause for complete submittal rejection. PRODUCTS GENERAL All materials shall meet or exceed all applicable referenced standards, federal, state and local requirements, and conform to codes and ordinances of authorities having jurisdiction. packaged domestic hot water heater (boiler hot water heating medium) Acceptable manufacturers Ace Heaters 揗ini-Pack� AERCO International 揝martplate� Harsco Patterson-Kelley Company 揅ompact� PVI Industries 換uickdraw� RECO 揟hermodyne HX� Furnish and install packaged semi-instantaneous double-wall domestic hot water heaters with dimensions and capacities as scheduled on the Contract Drawings and as outlined herein. This Specification describes minimum quality and performance requirements. Variations of system components by the individual referenced manufacturers are acceptable for installation in this project provided they meet or exceed all of the requirements indicated herein and fit properly in the space provided. Heaters shall be designed, manufactured and stamped in accordance with Section VIII Div. 1 of ASME Code for design pressures of 150 PSIG at 210 degrees F. shell side and 150 PSIG at 370 degrees F. or 370 PSIG at 450 degrees F. tubeside. ASME label with National Board registration. Each heater shall be U-tube, removable tube bundle type. The potable water shall be heated in the shell by hot water inside the tubes. Heaters shall have an integrally mounted non-ferrous recirculating water system to maintain the potable water within +/- 4 degrees F. of the specified outlet temperature under all normal conditions. The closure between hot water bonnet, tube sheet and shell flange must be made so either the tube side or shell side gasket can be inspected or replaced without disturbing the other gasket. The shell shall be constructed of solid austenitic type 316L stainless steel with 304L stainless steel fittings or 90-10 Cu-Ni shell and fittings. Non-metallic shell liners will not be acceptable. The tubing shall be double-wall copper or 90-10 Cu-Ni U-tubes expanded into a solid 304 stainless steel or naval brass shellside tubesheet and a carbon steel tubeside tubesheet. An open and fully visible 360 degree 3/8" wide leak detection gap shall exist between the two tube sheets. Tubing shall be 3/4" O.D. outer tube and 5/8" O.D. inner tube both of seamless 90/10 copper nickel. The combined metal thickness of the double tube walls shall not be less than .07 inch thickness excluding the leak detection groove depth. In order to provide positive detection and indication of leakage across the exchanger, the common surface between the inner and outer tubes shall be provided with a continuous network of leak detection passages all connected directly to the "tell-tale" space between the inner and outer tube sheets. Design shall provide fully visible 360 degree vented leak detection between tube sheets. "Weep-hole" designs are not acceptable. Design shall allow on-Site discovery and sealing of leaking tubes without requiring removal of the tube bundle. Each heater shall be completely assembled, ready to be connected at the installation Site and include: Modulating 3-way hot water control valve. Hot water thermometer, 3 � � dial, direct mounted with separable brass well. Two boiler water thermometers, 3 � � dial, direct mounted with separable brass well. Combination water pressure-temperature relief valve, ASME certified. Water recirculation system, non-ferrous with 1/12 HP circulator and isolation valves, 115V/60HZ/single phase. Nema 1 panel with on/off switch, green light (normal), red light (high temperature), manual-reset temperature limiting device with high temperature safety system to shut off hot water flow on pre-selected high temperature setting and dry contacts for remote 揌igh Limit Tripped Status� indication. Shell insulation: Unit shall be insulated meeting the latest ASHRAE 90 requirements. The insulation material shall be either fiberglass or flexible foam. An outer jacketing shall be provided of metal or flexible material. Unit shall be equipped with a double solenoid temperature limit system prewired with lighted over temperature control indication, actuated direct hot water relief, as well as isolation and/or diversion of motive pressure driving valve actuation. EXECUTION INSTALLATION Installation shall meet or exceed all applicable federal, state and local requirements, referenced standards and conform to codes and ordinances of authorities having jurisdiction. All installation shall be in accordance with manufacturer抯 published recommendations. Install the water heaters, piping and accessories in accordance with the manufacturer抯 installation instructions. Furnish all supports required by the equipment included in this Contract. Provide a 4" thick, reinforced concrete housekeeping pad beneath units. Furnish and install all necessary valves, traps, gauges, strainers, unions, etc. to facilitate proper functioning and servicing of equipment. When installed water heaters are not equipped with integral temperature gauge, provide a temperature gauge in the domestic hot water piping within five feet of outlet to each heater. Size and locate gauges to be easily readable from a standing position. Provide dielectric isolation device where copper lines connect to ferrous lines or equipment, such as dielectric coupling or dielectric flange fitting. Install a line size shutoff valve in cold water inlet and hot water outlet close to each heater. Pipe T&P relief valve discharge and all equipment drains indirectly to appropriate floor drain. Set the operating and safety controls. Set thermostats on domestic water heaters to deliver maximum water temperature as indicated on Contract Drawings. Furnish and install an expansion tank on cold water supply to heater. Locate tank as close to water heater as possible between water heater and all check valves or backflow preventers. Expansion tank capacity shall be as scheduled on Contract Drawings. Install expansion tank in accordance with manufacture抯 recommendations. Expansion tank factory pre-charge pressure may not be correct for this installation. Tank must be charged to system design fill pressure before being filled with water. If the system has been filled, the tank must be isolated from the system and the tank emptied before charging. Verify static pressure within the existing domestic hot water system at the Site and adjust tank pressure accordingly. Startup Startup on hot water generators shall be performed by factory trained and authorized personnel. A copy of the startup report shall be provided to the Owner. The factory representative shall also provide a technical and practical operation and maintenance training seminar including a hands-on operation and maintenance demonstration, and classroom presentation with handouts and visual aids, for no less than three physical plant personnel. 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