SECTION (15900) - INSTRUMENTATION AND CONTROL FOR HVAC
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1 SECTION (15900) - INSTRUMENTATION AND CONTROL FOR HVAC PART 1 GENERAL 1.01 SUMMARY A. Section Includes: 1. Control Panels 2. Thermostats 3. Actuators 4. Dampers 5. Wiring B. Related Sections: 1. Section (15940) - Sequence of Operations for HVAC Controls 2. Section (15731) Gas Fired Makeup Air Units 3. Section (15733) Dedicated Outdoor Air Units 4. Section (15735) Packaged Terminal Air Conditioning Units 5. Section (15738) Vertical Packaged Terminal Air Conditioning Units 6. Section (15738) Split System Air Conditioners 7. Section (15940) - Sequence of Operations for HVAC Controls Note: Reference below is for INNCOM Smart Digital Thermostats for use with Guestroom automation system. Per Module 15, INNCOM Thermostats are required for guestrooms for Marriott Managed Properties and an option for Franchise Properties REFERENCES 8. Section Integrated Automation Control of Guestroom Equipment 9. Section (16120) Low Voltage Electrical Power Conductors and Cables A. Air Movement & Control Association International, Inc. (AMCA) Publications: D "Laboratory Methods of Testing Dampers for Rating" B. National Electrical Manufacturer s Association (NEMA) Standards Publications: 1. DC 3 Residential Controls Electrical Wall-Mounted Room Thermostats C. National Fire Protection Association (NFPA) Publications: "National Electric Code" 2. 90A Standard for the Installation of Air Conditioning and Ventilating Systems D. Sheet Metal and Air Conditioning Contractors' National Association (SMACNA) E. Underwriter's Laboratories, Inc. (UL) Standards: A Standard For Wire Connectors and Soldering Lugs for Use With Copper Conductors B Standard for Wire Connectors for Use With Aluminum Conductors PAGE 1 FILE: CFRST-Instrumentation And Control For HVAC REVISED: 09/03/ , Marriott International, Inc. CFRST SPECMSTR-NEW BUILD
2 1.03 SYSTEM DESCRIPTION A. Electric/Digital Electronic system consists of sensors, indicators, actuators, final control elements, interface equipment, other apparatus, and accessories to control mechanical systems SUBMITTALS REVISED: 09/03/12 1. Shop Drawings: For each system to be controlled, prepare a drawing which includes a system flow diagram, control diagram, sequence of operation and schedule of components. Control diagrams shall be complete with end-to-end connections of wiring from component terminal. 2. Operation and Maintenance Data: Submit information for all products in accordance with the requirements of Specification " (01830) Operating and Maintenance Data QUALITY ASSURANCE A. Installer Qualifications: An experienced installer who is an approved installer of the automatic control system manufacturer for both installation and maintenance of units required for this Project. B. Manufacturer Qualifications: A firm experienced in manufacturing automatic temperaturecontrol systems similar to those indicated for this Project and with a record of successful inservice performance. C. Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA 70, Article 100, by a testing agency acceptable to authorities having jurisdiction, and marked for intended use. D. Comply with NFPA 90A, "Installation of Air Conditioning and Ventilation Systems." E. The provision of 120 and 208 line voltage and 24 volt low voltage wiring, conduit, installed in accordance with National Fire Protection Association (NFPA) 70, National Electric Code and Division 26 of these specifications DELIVERY, STORAGE, AND HANDLING A. Factory-Mounted Components: Where control devices specified in this Section are indicated to be factory mounted on equipment, arrange for shipping of control devices to unit manufacturer COORDINATION A. Coordinate location of thermostats, humidistats, and other exposed control sensors with plans and room details before installation TRAINING A. Submit in accordance with the requirements of specification Section (01820). PART 2 PRODUCTS 2.01 CONTROL PANELS A. MANUFACTURERS 1. Approved Manufacturers: a. Siemens USA ( ). b. Invensys Controls (formally Siebe Environmental Controls) ( ) PAGE 2 FILE: CFRST-Instrumentation And Control For HVAC CFRST SPECMSTR-NEW BUILD 2012, Marriott International, Inc.
3 c. Honeywell Inc., Automation and Control Solutions ( ) B. Local Control Panels: Unitized 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 thick, furniture-quality steel, or extruded-aluminum alloy, totally enclosed, with hinged doors and keyed lock and with manufacturer's standard shop-painted finish. 2. Panel-Mounted Equipment: Mounted transformers, 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 THERMOSTATS Note: Marriott will not accept substitutions for items shown below, including standard units supplied with PTAC s or VTAC s. A. Manufacturers: 1. Preferred Manufacturers: a. PSG Controls, Inc. ( ) 1) HotelStat Model (Cooling Units with Electric Heat) 2) HotelStat Model (Heat Pump with backup Electric Heat) Note: The following models are for use with First Company VTAC SPX series units ONLY.. 3) Model T (First Company SPX Series VTAC Cooling Units with Electric Heat) 4) Model T HP (First Company SPX Series VTAC Heat Pump with backup Electric Heat) 2. Approved Manufacturers: a. Carrier Corp.; Carrier Air Conditioning Division, United Technologies Corporation ( x 3496). 1) Debonair Model 33CSSN2-MH b. Trane, an Ingersoll Rand Brand ( ) 1) Zone Controller (Thermostat) Note: Reference below is for INNCOM Smart Digital Thermostats for use with Guestroom automation system. Coordinate use of thermostats above with automation system specified in Section if required for Project. Per Module 15, INNCOM Thermostats are required for guestrooms for Marriott Managed Properties and an option for Franchise Properties. a. Refer to Section Integrated Automation Control of Guestroom Equipment for Smart Digital Thermostats to be used for Guestroom automation system. B. Combination Thermostat and Fan Switches: Line-voltage or low voltage thermostat with two-, three-, or four-position, push-button or lever-operated fan switch. 1. Label switches "FAN ON-OFF," "FAN HIGH-LOW-OFF," "FAN HIGH-MED-LOW-OFF." Provide unit for mounting on two-gang switch box. PAGE 3 FILE: CFRST-Instrumentation And Control For HVAC REVISED: 09/03/ , Marriott International, Inc. CFRST SPECMSTR-NEW BUILD
4 C. Electric solid-state, microcomputer-based room thermostat with remote sensor. (Where indicated on drawings.) REVISED: 09/03/12 1. Automatic switching from heating to cooling. 2. Preferential rate control to minimize overshoot and deviation from set point. 3. Set up for four separate temperatures per day. 4. Instant override of set point for continuous or timed period from 1 hour to 31 days. 5. Short-cycle protection. 6. Programming based on every day of week. 7. Selection features include deg F display, 12- or 24-hour clock, keyboard disable, remote sensor, fan on-auto. 8. Battery replacement without program loss. 9. Thermostat backlit display features include the following: a. Time of day. b. Actual room temperature. c. Programmed temperature. d. Programmed time. e. Duration of timed override. f. Day of week. g. System mode indications include "heating," "off," "fan auto," and "fan on." D. Low-Voltage, On-Off Thermostats: NEMA DC 3, 24-V, bimetal-operated, mercury-switch type, with adjustable or fixed anticipation heater. E. Line-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. 1. Equip thermostats, which control electric heating loads directly, with off position on dial wired to break ungrounded conductors. 2. Dead Band: Maximum 2 deg F. F. Room Thermostat Cover Construction: Manufacturer's standard locking covers. G. Room thermostat accessories include the following: 2.03 ACTUATORS 1. Insulating Bases: For thermostats located on exterior walls. 2. Thermostat Guards: Locking; heavy-duty, transparent plastic; mounted on separate base. 3. Adjusting Key: As required for calibration and cover screws. 4. Aspirating Boxes: For flush-mounted aspirating thermostats. 5. Set-Point Adjustment: 1/2-inch-diameter, adjustment knob. A. Electric Motors: Spring-return type operators, sized to operate with sufficient reserve power to provide smooth modulating action or two-position action. PAGE 4 FILE: CFRST-Instrumentation And Control For HVAC CFRST SPECMSTR-NEW BUILD 2012, Marriott International, Inc.
5 2.04 DAMPERS 1. 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. 2. Temperature Rating: Minus 22 to plus 122 deg F. 3. Damper Operator Mounting: Mount damper operators where accessible for maintenance. a. If located outside the duct or casing, mount operators on a 14 gauge reinforced support plate arranged to allow insulation between the support plate and the face of the duct or casing. b. Brace damper operators rigid to show no deflection or movement over the full range of the damper stroke. A. Dampers: Factory fabricated AMCA-rated opposed blade design of extruded aluminum, galvanized steel, with metallic antifriction nonferrous bearings. 1. Blades shall be secured to 1/2-inch diameter, zinc-plated axles using zinc-plated hardware, with nylon blade bearings, blade-linkage hardware of zinc-plated steel and brass, ends sealed against spring-stainless-steel blade bearings, and thrust bearings at each end of every blade. 2. Operating Temperature Range: From minus 40 to plus 200 deg F. 3. Pressure Rating: Rated for leakage at less than 10 cfm per sq. ft. of damper area, at differential pressure of 4 inches wg when damper is being held by torque of 50 in. x lbf when tested according to AMCA 500D. 4. Shafts and Bearings: Provide cadmium plated steel shafts in permanently lubricated bronze sleeve bearings or permanently lubricated ball bearings. 5. Blade: Reinforced or ribbed blades shall not exceed 8 inches in width nor 48 inches in length. a. Blades shall be constructed of 16 gage (minimum) galvanized steel or extruded aluminum. b. Flat or un-reinforced blades will not be acceptable. c. Damper sections exceeding 4 feet in width or 4 feet height shall be constructed with multiple frames and linkages. 6. Frames: Construct frames of factory welded 13 gage (minimum) galvanized steel hot dipped after construction or bolted extruded aluminum frames. a. Dampers larger than 8 square feet in area shall have corner bracing gussets at each corner welded to the damper frame. 7. Linkages: Provide linkages to uniformly transmit damper operating forces to each damper blade. a. Construct linkages of galvanized or cadmium plated steel or stainless steel. b. Bearings and joints shall be ball and socket or sleeve bearings of brass, bronze or stainless steel, with plated bolts and locking nuts. 8. Seals: Provide mechanically attached elastomer or neoprene blade tip seal along the full length of each blade edge and flexible stainless steel seals along damper blade ends where the blades abut the frame. Adhesives or staples will not be acceptable. PAGE 5 FILE: CFRST-Instrumentation And Control For HVAC REVISED: 09/03/ , Marriott International, Inc. CFRST SPECMSTR-NEW BUILD
6 2.05 WIRING REVISED: 09/03/12 9. Damper Mounting: Mount dampers to casings and ductwork in conformance with SMACNA standards. Provide welded or bolted galvanized steel structural supports for dampers larger than 20 square feet. Through bolt damper frames to structural supports. 10. Submit information showing leakage and flow characteristics, and schedule showing sizes, locations and actuators. A. General: Provide a complete system of electric wiring for temperature control apparatus including control power transformers and wiring to the transformer primary. B. Insulation Level: Control circuit conductors which run in the same conduit as power circuit conductors shall have the same insulation level as adjacent power conductors. C. NFPA 70: All wiring shall conform to the requirements of the NFPA 70. D. Wiring: Wire for low voltage AC shall be minimum 300 volt insulated copper No. 18 AWG or larger conforming to NFPA 70, Type MTW, THHN or TFFN. 1. For low voltage DC and an electronic circuit carrying less than 0.5 amperes, cables of two or more conductors not smaller than No. 18 AWG solid copper or No. 18 AWG solid copper if not shielded may be used in lieu of individual wires. 2. Cables carrying analog signals shall be shielded. 3. Cables shall be terminated in solder or screw type terminal strips. 4. Cables shall not be tapped at any intermediate points. 5. All wire shall not be color coded or numbered for identification. Identify as indicated on shop drawings and As-Built drawings. 6. Wire terminating in screw type terminal strips shall have pressure connectors conforming to UL 486A, Wire Connectors and Soldering Lugs for Use With Copper Conductors, or UL 486B, Wire Connectors for Use With Aluminum Conductors. 7. Wire terminations without connectors or travelling pressure pads will not be accepted KITCHEN HOOD CONTROL 1. Approved Manufacturers: a. Melink Corporation ( ) B. Demand Ventilation Control: Unitized the Melink Intelli-Hood system. PART 3 EXECUTION 3.01 EXAMINATION A. Verify that duct-, pipe-, and equipment-mounted devices and wiring are installed before proceeding with installation INSTALLATION A. Install equipment level and plumb. B. Verify location of thermostats and other exposed control sensors with plans and room details before installation, unless otherwise indicated on the mechanical, electrical, or architectural drawings. Locate all wall mounted devices 60 inches above the floor. C. Install guards on thermostats in the following locations: 1. Where indicated on drawings. PAGE 6 FILE: CFRST-Instrumentation And Control For HVAC CFRST SPECMSTR-NEW BUILD 2012, Marriott International, Inc.
7 D. Install damper motors on duct exterior. Do not locate operators exposed to outdoor temperatures. Arrange actuators to Fail Safe in the event of power failure. E. Install labels and nameplates to identify control components according to Section (15075) - " Identification for HVAC Piping and Equipment." 3.03 ELECTRICAL WIRING AND CONNECTION INSTALLATION A. Install raceways, boxes, and cabinets according to Division 26. B. Install building wire and cable according to Section (16120) - "Low Voltage Electrial Power Conductors and Cables." C. Install signal and communication cable according to Division Conceal cable, except in mechanical rooms and areas where other conduit and piping are exposed. 2. Install exposed cable in raceway. 3. Bundle and harness multi-conductor instrument cable in place of single cables where several cables follow a common path. 4. Fasten flexible conductors, bridging cabinets and doors, along hinge side; protect against abrasion. Tie and support conductors. 5. Number-code or color-code conductors for future identification and service of control system, except local individual room control cables. D. Connect manual-reset limit controls independent of manual-control switch positions. Automatic duct heater resets may be connected in interlock circuit of power controllers. E. Connect hand-off-auto selector switches to override automatic interlock controls when switch is in hand position. F. All wall-mounted space sensors such as thermostats shall be securely anchored to an electrical box. Do not mount devices directly to the wall surfaces. G. Identification: Labor or color code each filed wire and conduit at each controller and controlled device. 1. Identification shall be permanent and not subject to fading. 2. Permanently mark terminal blocks at wire termination points FIELD QUALITY CONTROL A. Operational Test: After electrical circuitry has been energized, start units to confirm proper unit operation. Remove malfunctioning units, replace with new units, and retest. B. Test and adjust controls and safeties. Replace damaged and malfunctioning controls and equipment, and retest. C. Replace damaged or malfunctioning controls and equipment. 1. Start, test, and adjust control systems. 2. Demonstrate compliance with requirements, including calibration and testing, and control sequences. 3. Adjust, calibrate, and fine tune circuits and equipment to achieve sequence of operation specified. PAGE 7 FILE: CFRST-Instrumentation And Control For HVAC REVISED: 09/03/ , Marriott International, Inc. CFRST SPECMSTR-NEW BUILD
8 3.05 DEMONSTRATION AND TRAINING A. Demonstration: Include start-up, automatic and manual operation, and emergency modes of use in accordance with the prescribed sequence of operations. Should the HVAC system demonstration fail to operate properly, the system shall be repaired, recalibrated, and retested as necessary. B. Train Owner's maintenance personnel to adjust, operate, and maintain control systems and components. 1. Train Owner's maintenance personnel on procedures and schedules for starting and stopping, troubleshooting, servicing, and maintaining equipment and schedules. 2. Conduct training as specified in Section (01820) - "Training POST OCCUPANCY ON-SITE ASSISTANCE A. Occupancy Adjustments: Within one year of date of Substantial Completion, provide up to three 2-hour on-site Project visits, when requested by Owner, to adjust and calibrate components and to assist Owner's personnel in making program changes, adjust sensors and controls to suit actual conditions, and assist in the diagnostics of HVAC problems. END OF SECTION REVISED: 09/03/12 PAGE 8 FILE: CFRST-Instrumentation And Control For HVAC CFRST SPECMSTR-NEW BUILD 2012, Marriott International, Inc.
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