SECTION HVAC DUCTS AND CASINGS

Transcription

1 PRT 1 GENERL 1.01 SECTION INCLUDES. Metal ductwork. C. Casing and plenums. D. Duct cleaning RELTED REQUIREMENTS SECTION HVC DUCTS ND CSINGS. Section Volatile Organic Compound (VOC) Content Restrictions. B. Section Firestopping. C. Section Painting and Coating: Weld priming, weather resistant, paint or coating. D. Section HVC ir Duct Cleaning: Cleaning ducts after completion of installation. E. Section Duct Insulation: External insulation and duct liner. F. Section ir Duct ccessories. G. Section ir Terminal Units. H. Section ir Outlets and Inlets. I. Section Testing, djusting, and Balancing for HVC REFERENCE STNDRDS. SHRE (FUND)- SHRE Handbook- Fundamentals; B. STM 36/36M - Standard Specification for Carbon Structural Steel; C. STM 653/653M- Standard Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc Iron lloy-coated (Galvannealed) by the Hot-Dip Process; D. NFP 90- Standard for the Installation of ir-conditioning and Ventilating Systems; National Fire Protection ssociation; E. NFP 90B- Standard for the Installation of Warm ir Heating and ir Conditioning Systems; National Fire Protection ssociation; F. NFP 96- Standard for Ventilation Control and Fire Protection of Commercial Cooking Operations; National ssociation; G. SMCN (LEK)- HVC ir Duct Leakage Test Manual; Sheet Metal and ir Conditioning Contractors' National ssociation; 2012, 2nd Edition. H. SMCN (DCS)- HVC Duct Construction Standards; I. SMCN (KVS) - Kitchen Ventilation Systems and Food Service Equipment Fabrication & Installation Guidelines; J. UL Grease Ducts. K. UL Test of Fire Resistive Grease Duct Enclosure ssemblies SUBMITTLS. See Section dministrative Requirements, for submittal procedures. B. Product Data: Provide data for duct materials. C. Shop Drawings: Indicate duct fittings, particulars such as gages, sizes, welds, and configuration prior to start of work for low pressure class. D. Test Reports: Indicate pressure tests performed. Include date, section tested, test pressure, and leakage rate, following SMCN (LEK)- HVC ir Duct Leakage Test Manual. E. Project Record Documents: Record actual locations of ducts and duct fittings. Record changes in fitting location and type. Show additional fittings used HVC DUCTS ND CSINGS

2 1.05 QULITY SSURNCE Manufacturer Qualifications: Company specializing in manufacturing the type of products specified in this section, with minimum three years of documented experience. B. Installer Qualifications: Company specializing in performing the type of work specified in this section, with minimum 3 years of documented experience REGULTORY REQUIREMENTS Construct ductwork to NFP 90 standards FIELD CONDITIONS Do not install duct sealants when temperatures are less than those recommended by sealant manufacturers. B. Maintain temperatures within acceptable range during and after installation of duct sealants. PRT 2 PRODUCTS 2.01 DUCT SSEMBLIES ll Ducts: Galvanized steel, unless otherwise indicated. B. Low Pressure Supply (Heating Systems): 1/2 inch w.g. (125 Pa) pressure class, galvanized steel. C. Return and Relief: 1/2 inch w.g. (125 Pa) pressure class, galvanized steel. D. General Exhaust: 1/2 inch w.g. (125 Pa) pressure class, galvanized steel. E. Grease Exhaust: 1/2 inch w.g. (125 Pa) pressure class, stainless steel. 1. Construct of STM 1011/ 1011 M 16 gage (1.52 mm) un-galvanized steel. 2. Construction: a. Liquid tight with continuous external weld for all seams and joints. b. Where ducts are not self draining back to equipment, provide low point drain pocket with copper drain pipe to sanitary sewer. 3. ccess Doors: a. Provide for duct cleaning inside horizontal duct at drain pockets, every 20 feet (6 m) and at each change of direction. b. Use same material and thickness as duct with gaskets and sealants rated 1500 degrees F (815 degrees C) for grease tight construction. F. Outside ir Intake: 1/2 inch w.g. (125 Pa) pressure class, galvanized steel MTERILS Galvanized Steel for Ducts: Hot-dipped galvanized steel sheet, STM 653/653M FS Type B, with G60/Z180 coating. B. Joint Sealers and Sealants: Non-hardening, water resistant, mildew and mold resistant. 1. Type: Heavy mastic or liquid used alone or with tape, suitable for joint configuration and compatible with substrates, and recommended by manufacturer for pressure class of ducts. 2. VOC Content: Not more than 250 g/l, excluding water. 3. Surface Burning Characteristics: Flame spread of zero, smoke developed of zero, when tested in accordance with STM E For Use With Flexible Ducts: UL labeled. 5. Products: a. Carlisle HVC Products; Hardcast Iron-Grip 601 Water Based Duct Sealant: b. Substitutions: See Section Product Requirements. C. Hanger Rod: STM 36/36M; steel, galvanized; threaded both ends, threaded one end, or continuously threaded HVC DUCTS ND CSINGS

3 D. Hanger Fasteners: ttach hangers to structure using appropriate fasteners DUCTWORK FBRICTION Fabricate and support in accordance with SMCN HVC Duct Construction Standards and as indicated. B. No variation of duct configuration or size permitted except by written permission. Size round duct installed in place of rectangular ducts in accordance with SH RE Handbook Fundamentals. C. Provide duct material, gages, reinforcing, and sealing for operating pressures indicated. D. Construct T's, bends, and elbows with radius of not less than 1-1/2 times width of duct on centerline. Where not possible and where rectangular elbows must be used, provide air foil turning vanes of perforated metal with glass fiber insulation. E. Increase duct sizes gradually, not exceeding 15 degrees divergence wherever possible; maximum 30 degrees divergence upstream of equipment and 45 degrees convergence downstream. F. Where ducts are connected to exterior wall louvers and duct outlet is smaller than louver frame, provide blank-out panels sealing louver area around duct. Use same material as duct, painted black on exterior side; seal to louver frame and duct CSINGS Fabricate casings in accordance with SMCN HVC Duct Construction Standards and construct for operating pressures indicated. 2~5 ~TCHENHOODEXHUSTDUCTWORK Fabricate in accordance with SMCN HVC Duct Construction Standards, SMCN Kitchen Ventilation Systems and Food Service Equipment Fabrication & Installation Guidelines and NFP 96. PRT 3 EXECUTION 3.01 INSTLLTION Install, support, and seal ducts in accordance with SMCN HVC Duct Construction Standards. B. Install in accordance with manufacturer's instructions. C. During construction provide temporary closures of metal or taped polyethylene on open ductwork to prevent construction dust from entering ductwork system. D. Flexible Ducts: Connect to metal ducts with adhesive. E. Duct sizes indicated are inside clear dimensions. For lined ducts, maintain sizes inside lining. F. Provide openings in ductwork where required to accommodate thermometers and controllers. Provide pilot tube openings where required for testing of systems, complete with metal can with spring device or screw to ensure against air leakage. Where openings are provided in insulated ductwork, install insulation material inside a metal ring. G. Locate ducts with sufficient space around equipment to allow normal operating and maintenance activities. H. Use crimp joints with or without bead for joining round duct sizes 8 inch (200 mm) and smaller with crimp in direction of air flow. I. Use double nuts and lock washers on threaded rod supports. J. Connect diffusers or light troffer boots to low pressure ducts directly or with 5 feet (1.5 m) maximum length of flexible duct held in place with strap or clamp. K. t exterior wall louvers, seal duct to louver frame and install blank-out panels HVC DUCTS ND CSINGS

4 3.02 CLENING Clean duct system and force air at high velocity through duct to remove accumulated dust. To obtain sufficient air, clean half the system at a time. Protect equipment that could be harmed by excessive dirt with temporary filters, or bypass during cleaning. B. Clean duct systems with high power vacuum machines. Protect equipment that could be harmed by excessive dirt with filters, or bypass during cleaning. Provide adequate access into ductwork for cleaning purposes. END OF SECTION HVC DUCTS ND CSINGS

5 PRT 1 GENERL 1.01 SECTION INCLUDES Volume control dampers SUBMITTLS SECTION IR DUCT CCESSORIES See Section dministrative Requirements, for submittal procedures QULITY SSURNCE Manufacturer Qualifications: Company specializing in manufacturing the type of products specified in this section, with minimum three years of documented experience. B. Products Requiring Electrical Connection: Listed and classified by Underwriters Laboratories Inc DELIVERY, STORGE, ND HNDLING Protect dampers from damage to operating linkages and blades. PRT 3 EXECUTION 3.01 PREPRTION Verify that electric power is available and of the correct characteristics INSTLLTION Install accessories in accordance with manufacturer's instructions, NFP 90, and follow SMCN HVC Duct Construction Standards. Refer to Section for duct construction and pressure class. B. t fans and motorized equipment associated with ducts, provide flexible duct connections immediately adjacent to the equipment. END OF SECTION IR DUCT CCESSORIES

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7 PRT 1 GENERL 1.01 SECTION INCLUDES Wall exhausters REFERENCE STNDRDS SECTION HVC POWER VENTILTORS MC (DIR)- [Directory of] Products Licensed Under MC International Certified Ratings Program; ir Movement and Control ssociation International, Inc.; am ca. org/certified/search/com pany. aspx SUBMITTLS See Section dministrative Requirements, for submittal procedures PRT 2 PRODUCTS 2.01 POWER VENTILTORS - GENERL Static and Dynamically Balanced: MC Balance Quality and Vibration Levels for Fans. B. Performance Ratings: Determined in accordance with MC 210 and bearing the MC Certified Rating Seal. C. Sound Ratings: MC 301, tested to MC 300, and bearing MC Certified Sound Rating Seal. D. Fabrication: Conform to MC 99. E. Electrical Components: Listed and classified by Underwriters Laboratories Inc WLL EXHUSTERS Fan Unit: V-belt or direct driven with spun aluminum housing; resiliently mounted motor; 1/2 inch mesh, inch thick aluminum wire bird screen. B. Backdraft Damper: Gravity actuated, aluminum multiple blade construction, felt edged with offset hinge pin, nylon bearings, blades linked, and line voltage motor drive, power open, spring return. C. Sheaves: For V-belt drives, provide cast iron or steel, dynamically balanced, bored to fit shafts and keyed; variable and adjustable pitch motor sheaves selected so required rpm is obtained with sheaves set at mid-position; fan shaft with self-aligning pre-lubricated ball bearings. PRT 3 EXECUTION 3.01 INSTLLTION Install in accordance with manufacturer's instructions. END OF SECTION HVC POWER VENTILTORS

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9 PRT 1 GENERL 1.01 SECTION INCLUDES Forced air furnaces. B. ir cooled condensing units. C. Controls RELTED REQUIREMENTS SECTION SMLL SPLIT-SYSTEM HETING ND COOLING Section Cast-in-Place Concrete: Mounting pad for outdoor unit. B. Section Plumbing Piping: Natural gas piping. C. Section Plumbing Piping: Indoor coil condensate drain. D. Section Breechings, Chimneys, and Stacks: Flue or stack. E. Section HVC Ducts and Casings. F. Section Instrumentation and Control Devices for HVC. G. Section Equipment Wiring: Electrical characteristics and wiring connections and installation and wiring of thermostats and other controls components REFERENCE STNDRDS HRI 270- Sound Rating of Outdoor Unitary Equipment; ir-conditioning, Heating, and Refrigeration Institute; B. HRI 520- Performance Rating of Positive Displacement Condensing Units; ir-conditioning, Heating, and Refrigeration Institute; C. SH RE Std 15- Safety Standard for Refrigeration Systems; merican Society of Heating, Refrigerating and ir-conditioning Engineers, Inc.; 2013 (NSI/SHRE Std 15). D. SHRE Std Energy Standard for Buildings Except Low-Rise Residential Buildings; merican Society of Heating, Refrigerating and ir-conditioning Engineers, Inc.; 2013, Including ll ddenda (NSI/SHRE/IES Std 90.1 ). E. NEM MG 1 - Motors and Generators; National Electrical Manufacturers ssociation; F. NFP 54- National Fuel Gas Code; National Fire Protection ssociation; G. NFP 90- Standard for the Installation of ir-conditioning and Ventilating Systems; National Fire Protection ssociation; H. NFP 90B - Standard for the Installation of Warm ir Heating and ir Conditioning Systems; National Fire Protection ssociation; I. UL 207- Refrigerant-Containing Components and ccessories, Nonelectrical; Underwriters Laboratories Inc.; Current Edition, Including ll Revisions SUBMITTLS See Section dministrative Requirements, for submittal procedures. B. Product Data: Provide rated capacities, weights, accessories, electrical nameplate data, and wiring diagrams. C. Shop Drawings: Indicate assembly, required clearances, and location and size of field connections. D. Design Data: Indicate refrigerant pipe sizing. E. Manufacturer's Instructions: Indicate rigging, assembly, and installation instructions. F. Project Record Documents: Record actual locations of components and connections SMLL SPLIT-SYSTEM HETING ND COOLING

10 G. Operation and Maintenance Data: Include manufacturer's descriptive literature, operating instructions, installation instructions, maintenance and repair data, and parts listing. H. Warranty: Submit manufacturers warranty and ensure forms have been filled out in Owners name and registered with manufacturer. I. Maintenance Materials: Furnish the following for Owner's use in maintenance of project. 1. See Section Product Requirements, for additional provisions. 2. Extra Filters: One for each unit QULITY SSURNCE. Manufacturer Qualifications: Company specializing in manufacturing the type of products specified in this section, with minimum three years of documented experience. B. Installer Qualifications: Company specializing in performing the work of this section with minimum 3 years of experience and approved by manufacturer WRRNTY. See Section Closeout Submittals, for additional warranty requirements. B. Provide three year manufacturers warranty for solid state ignition modules. C. Provide five year manufacturers warranty for heat exchangers. PRT 2 PRODUCTS 2.01 MNUFCTURERS. Carrier Corporation C. York International Corporation I Johnson Controls D. Daikin E. Substitutions: See Section Product Requirements SYSTEM DESIGN. Split-System Heating and Cooling Units: Self-contained, packaged, matched factoryengineered and assembled, pre-wired indoor and outdoor units; UL listed. 1. Heating: Natural gas fired. 2. Cooling: Outdoor electric condensing unit with evaporator coil. 3. Provide refrigerant lines internal to units and between indoor and outdoor units, factory cleaned, dried, pressurized and sealed, with insulated suction line. B. Performance Requirements: See Drawings for additional requirements. 1. Efficiency: a. Seasonal Energy Efficiency Ratio: 13.0, minimum. b. Energy Efficiency Ratio: 13. c. nnual Fuel Utilization Efficiency (FUE) of 92 in accordance with SHRE Std 103. d. Comply with SHRE Std ir Handling: a. ir Flow: as shown in schedule. b. External Static Pressure Resistance:.5 inch wg. 3. Heating Performance Requirements: a. Heating Output: as shown in schedule. b. Heating Input: as shown in schedule. c. Gas heating capacities are sea level ratings. 4. Cooling Performance Requirements: a. Evaporator Cooling Output: as shown in schedule. b. Outdoor Unit Rated Cooling Output: as shown in schedule. C. Electrical Characteristics: volts, single phase, 60 Hz SMLL SPLIT-SYSTEM HETING ND COOLING

11 2. Disconnect Switch: Factory mount disconnect switch on equipment under provisions of Section INDOOR UNITS FOR DUCTED SYSTEMS Indoor Units: Self-contained, packaged, factory assembled, pre-wired unit consisting of cabinet, supply fan, heating and cooling element(s), controls, and accessories; wired for single power connection with control transformer. 1. ir Flow Configuration: Counterflow, with additional steel base. 2. Cabinet: Steel with baked enamel finish, easily removed and secured access doors with safety interlock switches, glass fiber insulation with reflective liner. B. Supply Fan: Centrifugal type rubber mounted with direct or belt drive with adjustable variable pitch motor pulley. 1. Motor: NEM MG 1; 1750 rpm single speed, permanently lubricated, hinge mounted. 2. Motor Electrical Characteristics: C. ir Filters: 1 inch (25 mm) thick urethane, washable type arranged for easy replacement. D. Evaporator Coils: Copper tube aluminum fin assembly, galvanized or polymer drain pan sloped in all directions to drain, drain connection, refrigerant piping connections, restricted distributor or thermostatic expansion valve. 1. Construction and Ratings: In accordance with H Rl 21 0/240 and U L Manufacturers: System manufacturer OUTDOOR UNITS Outdoor Units: Self-contained, packaged, pre-wired unit consisting of cabinet, with compressor and condenser. 1. Comply with HRI Refrigerant: Use only refrigerants that have ozone depletion potential (ODP) of zero and global warming potential (GWP) of less than Refrigerant: R-41 O 4. Cabinet: Galvanized steel with baked enamel finish, easily removed and secured access doors with safety interlock switches, glass fiber insulation with reflective liner. 5. Construction and Ratings: In accordance with HRI 210/240 with testing in accordance with SHRE Std 23.1 and UL Sound Rating: 69 db, when measured in accordance with HRI 270. B. Compressor: HRI 520; hermetic, two speed 1800 and 3600 rpm, resiliently mounted integral with condenser, with positive lubrication, crankcase heater, high pressure control, motor overload protection, service valves and drier. Provide time delay control to prevent short cycling and rapid speed changes. C. ir Cooled Condenser: RI 520; luminum fin and copper tube coil, with direct drive axial propeller fan resiliently mounted, galvanized fan guard. 1. Condenser Fans: Direct-drive propeller type. 2., Condenser Fan Motor: Enclosed, 1-phase type, permanently lubricated. D. Coil: ir-cooled, aluminum fins bonded to copper tubes. E. ccessories: Filter drier, high pressure switch (manual reset), low pressure switch (automatic reset), service valves and gage ports, thermometer well (in liquid line). 1. Provide thermostatic expansion valves. F. Operating Controls: 1. Control by room thermostat to maintain room temperature setting. G. Mounting Pad: Precast concrete parking bumpers, minimum 4 inches (100 mm) square; minimum of two located under cabinet feet. 2~5 GSFURNCECOMPONENTS Heat Exchanger: luminized and stainless steel tubular type. B. Coating: Polypropylene SMLL SPLIT-SYSTEM HETING ND COOLING

12 C. Insulation: Foil-faced. D. Burner: 1. Gas valve, two stage provides 100 percent safety gas shut-off; 24 volt combining pressure regulation, safety pilot, manual set (On-Off), pilot filtration, automatic electric valve. 2. Electronic pilot ignition, with electric spark igniter. 3. Non-corrosive combustion air blower with permanently lubricated motor. E. Burner Safety Controls: 1. Thermocouple Sensor: Prevents opening of gas valve until pilot flame is proven and stops gas flow on ignition failure. 2. Flame Rollout Switch: Installed on burner box and prevents operation. 3. Vent Safety Shutoff Sensor: Temperature sensor installed on draft hood and prevents operation, manual reset. 4. Limit Control: Fixed stop at maximum permissible setting, de-energizes burner on excessive bonnet temperature, automatic resets. F. Operating Controls: 1. Cycle burner by room thermostat to maintain room temperature setting. 2. Supply fan energized from bonnet temperature independent of burner controls, with adjustable timed off delay and fixed timed on delay, with manual switch for continuous fan operation. 3. Provide continuous low speed fan operation. G. Flue Termination: Standard roof kit CCESSORY EQUIPMENT. Room Thermostat: Wall-mounted, electric solid state microcomputer based room thermostat with remote sensor to maintain temperature setting; low-voltage; with following features: 1. System selector switch (heat-off-cool) and fan control switch (auto-on). 2. utomatic switching from heating to cooling. 3. Preferential rate control to minimize overshoot and deviation from setpoint. 4. Set-up for four separate temperatures per day. 5. Instant override of setpoint for continuous or timed period from one hour to 31 days. 6. Short cycle protection. 7. Programming based on weekdays, Saturday and Sunday. 8. Selection features including degree For degree C display, 12 or 24 hour clock, keyboard disable, remote sensor, fan on-auto. 9. Battery replacement without program loss. 10. Thermostat display: a. Time of day. b. ctual room temperature. c. Programmed temperature. d. Programmed time. e. Duration of timed override. f. Day of week. g. System mode indication: heating, cooling, fan auto, off, and on, auto or on, off. 11. Manufacturers: a. Carrier Corporation. c. York International Corporation I Johnson Controls. d. Daikin. e. Substitutions: See Section Product Requirements. PRT 3 EXECUTION 3.01 EXMINTION. Verify that substrates are ready for installation of units and openings are as indicated on shop drawings SMLL SPLIT -SYSTEM HETING ND COOLING

13 B. Verify that proper power supply is available and in correct location. C. Verify that proper fuel supply is available for connection. D. Verify that water supply is available for humidifier INSTLLTION Install in accordance with manufacturer's instructions and requirements of local authorities having jurisdiction. B. Install in accordance with NFP 90 and NFP 90B. C. Install gas fired furnaces in accordance with NFP 54. D. Provide vent connections in accordance with NFP 211. E. Install refrigeration systems in accordance with SH RE Std 15. END OF SECTION SMLL SPLIT-SYSTEM HETING ND COOLING

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