Specification_-_23_09_23.13_20_-_B90.pdf

CONSTRUCT FIRE STATION ADDITION, BUILDING 90 PROJECT NO. DKGV12-2035

FINAL SUBMITTAL 5 NOVEMBER 2018

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BACnet DIRECT DIGITAL CONTROL SYSTEMS FOR HVAC 08/09

PART 1 GENERAL

1.1 REFERENCES

The publications listed below form a part of this s pecification to the extent referenced. The publications are referred t o in the text by the basic designation only.

AIR MOVEMENT AND CONTROL ASSOCIATION INTERNATIONAL (AMCA)

AMCA 500-D (2012) Laboratory Methods of Testing Dampers for Rating

AMERICAN SOCIETY OF HEATING, REFRIGERATING AND AIR- CONDITIONING

ENGINEERS (ASHRAE)

ASHRAE 135 (2012; Addenda AR 2013; Errata 1 2013; INT 1-9 2013; Errata 2 2013; INT 10-12 2014;

Errata 3-4 2014; Addenda AI-AY 2014; INT 13-17 2015) BACnet—A Data Communication Protocol for Building Automation and Control Networks

ARCNET TRADE ASSOCIATION (ATA)

ATA 878.1 (1999) Local Area Network: Token Bus

ASME INTERNATIONAL (ASME)

ASME B16.34 (2013) Valves - Flanged, Threaded and Welding End

ASME B16.5 (2013) Pipe Flanges and Flanged Fittings:

NPS 1/2 Through NPS 24 Metric/Inch Standard

ASME B31.1 (2014; INT 1-47) Power Piping

ASME B40.100 (2013) Pressure Gauges and Gauge Attachments

ASTM INTERNATIONAL (ASTM)

ASTM A126 (2004; R 2014) Standard Specification for Gray Iron Castings for Valves, Flanges, and Pipe Fittings

ASTM B117 (2011) Standard Practice for Operating Salt Spray (Fog) Apparatus

CONSUMER ELECTRONICS ASSOCIATION (CEA)

CEA-709.1-D (2014) Control Network Protocol

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Specification

INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS ( IEEE)

IEEE C62.41.1 (2002; R 2008) Guide on the Surges Environment in Low-Voltage (1000 V and Less) AC Power Circuits

IEEE C62.41.2 (2002) Recommended Practice on Characterization of Surges in Low-Voltage (1000 V and Less) AC Power Circuits

IEEE C62.45 (2002; R 2008) Recommended Practice on Surge Testing for Equipment Connected to Low-Voltage (1000v and less)AC Power Circuits

INTERNATIONAL ORGANIZATION FOR STANDARDIZATION (ISO )

ISO 8802-3 (2000) Information Technology - Telecommunications and Information Exchange Between Systems - Local and Metropolitan Area Networks - Specific Requirements - Part 3: Carrier Sense Multiple Access with Collision Detection (CSMA/CD)Access Method and Physical Layer Specifications

NATIONAL FIRE PROTECTION ASSOCIATION (NFPA)

NFPA 70 (2014; AMD 1 2013; Errata 1 2013; AMD 2 2013; Errata 2 2013; AMD 3 2014; Errata 3-4 2014; AMD 4-6 2014) National Electrical Code

NFPA 72 (2013) National Fire Alarm and Signaling Code

NFPA 90A (2015) Standard for the Installation of Air Conditioning and Ventilating Systems

SHEET METAL AND AIR CONDITIONING CONTRACTORS' NATIONAL ASSOCIATION

(SMACNA)

SMACNA 1966 (2005) HVAC Duct Construction Standards Metal and Flexible, 3rd Edition

UNDERWRITERS LABORATORIES (UL)

UL 1449 (2014;Reprint Mar 2015) Surge Protective Devices

UL 506 (2008; Reprint Oct 2013) Specialty Transformers

UL 508A (2013; Reprint Jan 2014) Industrial Control Panels

UL 916 (2007; Reprint Aug 2014) Standard for

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Energy Management Equipment

1.2 DEFINITIONS

1.2.1 ANSI/ASHRAE Standard 135

ANSI/ASHRAE Standard 135: BACnet - A Data Communica tion Protocol for Building Automation and Control Networks, referred to as "BACnet". ASHRAE developed BACnet to provide a method for diverse bu ilding automation devices to communicate and share data over a networ k.

1.2.2 ARCNET

ATA 878.1 - Attached Resource Computer Network. ARCNET is a deterministic LAN technology; meaning it's possible to determine the maximum delay before a device is able to transmit a message.

1.2.3 BACnet

Building Automation and Control Network; the common name for the communication standard ASHRAE 135. The standard defines methods and protocol for cooperating building automation device s to communicate over a variety of LAN technologies.

1.2.4 BACnet/IP

An extension of BACnet, Annex J, defines this mecha nism using a reserved UDP socket to transmit BACnet messages over IP netw orks. A BACnet/IP network is a collection of one or more IP subnetwor ks that share the same BACnet network number. See also "BACnet Broadcast Management Device".

1.2.5 BACnet Internetwork

Two or more BACnet networks, possibly using differe nt LAN technologies, connected with routers. In a BACnet internetwork, there exists only one message path between devices.

1.2.6 BACnet Network

One or more BACnet segments that have the same netw ork address and are interconnected by bridges at the physical and data link layers.

1.2.7 BACnet Segment

One or more physical segments of BACnet devices on a BACnet network, connected at the physical layer by repeaters.

1.2.8 BBMD

BACnet Broadcast Management Device (BBMD). A commu nications device, typically combined with a BACnet router. A BBMD fo rwards BACnet broadcast messages to BACnet/IP devices and other BBMDs conne cted to the same BACnet/IP network. Every IP subnetwork that is par t of a BACnet/IP network must have only one BBMD. See also "BACnet/IP".

1.2.9 BAS

Building Automation Systems, including DDC (Direct Digital Controls) used for facility automation and energy management.

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1.2.10 BAS Owner

The regional or local user responsible for managing all aspects of the BAS operation, including: network connections, worksta tion management, submittal review, technical support, control parame ters, and daily operation. The BAS Owner for this project is TRANE ..

1.2.11 BIBBs

BACnet Interoperability Building Blocks. A collect ion of BACnet services used to describe supported tasks. BIBBs are often described in terms of "A" (client) and "B" (server) devices. The “A” de vice uses data provided by the "B" device, or requests an action from the “ B” device.

1.2.12 BI

BACnet International, formerly two organizations: t he BACnet Manufacturers Association (BMA) and the BACnet Interest Group - N orth America (BIG-NA).

1.2.13 BI/BTL

BACnet International/BACnet Testing Laboratories (F ormerly BMA/BTL). The organization responsible for testing products for c ompliance with the BACnet standard, operated under the direction of BA Cnet International.

1.2.14 Bridge

Network hardware that connects two or more network (or BACnet internetwork) segments at the physical and data link layers. A b ridge may also filter messages.

1.2.15 Broadcast

A message sent to all devices on a network segment.

1.2.16 Device

Any control system component, usually a digital con troller, that contains a BACnet Device Object and uses BACnet to communicate with other devices.

See also "Digital Controller".

1.2.17 Device Object

Every BACnet device requires one Device Object, who se properties represent the network visible properties of that device. Eve ry Device Object requires a unique Object Identifier number on the B ACnet internetwork.

This number is often referred to as the device inst ance.

1.2.18 Device Profile

A collection of BIBBs determining minimum BACnet ca pabilities of a device, defined in ASHRAE Standard 135-2004, Annex L. Stan dard device profiles include BACnet Operator Workstations (B-OWS), BACne t Building Controllers (B-BC), BACnet Advanced Application Controllers (B- AAC), BACnet Application Specific Controllers (B-ASC), BACnet Smart Actuator (B-SA), and BACnet Smart Sensor (B-SS). Each device used in ne w construction is required to have a PICS statement listing BIBBs sup ported.

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1.2.19 Digital Controller

An electronic controller, usually with internal pro gramming logic and digital and analog input/output capability, which p erforms control functions. In most cases, synonymous with a BACnet device described in this specification. See also "Device".

1.2.20 Direct Digital Control (DDC)

Digital controllers performing control logic. Usua lly the controller directly senses physical values, makes control deci sions with internal programs, and outputs control signals to directly o perate switches, valves, dampers, and motor controllers.

1.2.21 DDC System

A network of digital controllers, communication arc hitecture, and user interfaces. A DDC system may include programming, sensors, actuators, switches, relays, factory controls, operator workst ations, and various other devices, components, and attributes.

1.2.22 Internet Protocol (IP, TCP/IP, UDP/IP)

A communication method, the most common use is the World Wide Web. At the lowest level, it is based on Internet Protocol (IP) , a method for conveying and routing packets of information over various LAN media. Two common protocols using IP are User Datagram Protocol (UDP) and Transmission Control Protocol (TCP). UDP conveys information to well-known "sockets" without confirmation of receipt. TCP establishes "s essions", which have end-to-end confirmation and guaranteed sequence of delivery.

1.2.23 Input/Output (I/O)

Physical inputs and outputs to and from a device, a lthough the term sometimes describes software, or "virtual" I/O. See also "Points".

1.2.24 I/O Expansion Unit

An I/O expansion unit provides additional point cap acity to a digital controller.

1.2.25 IP subnet

Internet protocol (IP) identifies individual device s with a 32-bit number divided into four groups from 0 to 255. Devices ar e often grouped and share some portion of this number. For example, on e device has IP address

209.185.47.68 and another device has IP address 209 .185.47.82. These two devices share Class C subnet 209.185.47.00

1.2.26 Local-Area Network (LAN)

A communication network that spans a limited geogra phic area and uses the same basic communication technology throughout.

1.2.27 LonTalk

CEA-709.1-D . A communication protocol developed by Echelon Co rp. LonTalk is an optional physical and data link layer for BAC net.

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1.2.28 MAC Address

Media Access Control address. The physical node ad dress that identifies a device on a Local Area Network.

1.2.29 Master-Slave/Token-Passing (MS/TP)

ISO 8802-3 . One of the LAN options for BACnet. MSTP uses tw isted-pair wiring for relatively low speed and low cost commun ication (up to 4,000 ft at 76.8K bps).

1.2.30 Native BACnet Device

A device that uses BACnet as its primary, if not on ly, method of communication with other BACnet devices without int ermediary gateways. A system that uses native BACnet devices at all level s is a native BACnet system.

1.2.31 Network

Communication technology for data communications. BACnet approved network types are BACnet over Internet Protocol (IP), Point to Point (PTP) Ethernet, ARCNET, MS/TP, and LonTalk®.

1.2.32 Network Number

A site-specific number assigned to each network seg ment to identify for routing. This network number must be unique throug hout the BACnet internetwork.

1.2.33 Object

The concept of organizing BACnet information into s tandard components with various associated properties. Examples include an alog input objects and binary output objects.

1.2.34 Object Identifier

An object property used to identify the object, inc luding object type and instance. Object Identifiers must be unique within a device.

1.2.35 Object Properties

Attributes of an object. Examples include present value and high limit properties of an analog input object. Properties a re defined in ASHRAE 135;

some are optional and some are required. Objects a re controlled by reading from and writing to object properties.

1.2.36 Peer-to-Peer

Peer-to-peer refers to devices where any device can initiate and respond to communication with other devices.

1.2.37 Performance Verification Test (PVT)

The procedure for determining if the installed BAS meets design criteria prior to final acceptance. The PVT is performed af ter installation, testing, and balancing of mechanical systems. Typi cally the PVT is performed by the Contractor in the presence of the Government.

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1.2.38 PID

Proportional, integral, and derivative control; thr ee parameters used to control modulating equipment to maintain a setpoint . Derivative control is often not required for HVAC systems (leaving "PI" c ontrol).

1.2.39 PICS

Protocol Implementation Conformance Statement (PICS ), describing the BACnet capabilities of a device. See BACnet, Annex A for t he standard format and content of a PICS statement.

1.2.40 Points

Physical and virtual inputs and outputs. See also "Input/Output".

1.2.41 PTP

Point-to-Point protocol connects individual BACnet devices or networks using serial connections like modem-to-modem links.

1.2.42 Repeater

A network component that connects two or more physi cal segments at the physical layer.

1.2.43 Router

A BACnet router is a component that joins together two or more networks using different LAN technologies. Examples include joining a BACnet Ethernet LAN to a BACnet MS/TP LAN.

1.2.44 Stand-Alone Control

Refers to devices performing equipment-specific and small system control without communication to other devices or computers for physical I/O, excluding outside air and other common shared condi tions. Devices are located near controlled equipment, with physical in put and output points limited to 64 or less per device, except for comple x individual equipment or systems. Failure of any single device will not cause other network devices to fail. BACnet "Smart" actuators (B-SA pr ofile) and sensors (B-SS profile) communicating on a network with a parent d evice are exempt from stand-alone requirements.

1.3 SUBCONTRACTOR SPECIAL REQUIREMENTS

Perform all work in this section in accordance with the paragraph entitled "Subcontractor Special Requirements" in Section 01 30 00 ADMINISTRATIVE REQUIREMENTS. The paragraph specifies that all con tract requirements of this section shall be accomplished directly by a fi rst tier subcontractor.

No work required shall be accomplished by a second tier subcontractor.

1.4 BACnet DIRECT DIGITAL CONTROL SYSTEMS FOR HVAC DESC RIPTION

a. For new equipment, provide new BACnet DDC syst ems including associated equipment and accessories. All new devices are acc essible using a Web browser interface and communicate using ASHRAE 135 BACnet communications without the use of gateways, unless gateways are shown on the design drawings and specifically requested b y the Government.

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Where gateways are allowed, they must support ASHRAE 135, including all object properties and read-write services shown on Government approved interoperability schedules. Manufacturer's product s, including design, materials, fabrication, assembly, inspection, and t esting shall be in accordance with ASHRAE 135, ASME B31.1 , and NFPA 70 , except where indicated otherwise.

b. The existing front end DDC system is manufactur ed by TRANE.

If installing a front end DDC Control system made b y a different manufacturer, the contractor shall be responsible f or fully integrating all binary and analog control points included in th is contract.

1.4.1 Design Requirements

1.4.1.1 Control System Drawings Title Sheet

Provide a title sheet for the control system drawin g set. Include the project title, project location, contract number, t he controls contractor preparing the drawings, an index of the control dra wings in the set, and a legend of the symbols and abbreviations used throug hout the control system drawings.

1.4.1.2 List of I/O Points

Also known as a Point Schedule, provide for each in put and output point physically connected to a digital controller: poin t name, point description, point type (Analog Output (AO), Analog Input (AI), Binary Output (BO), Binary Input (BI)), point sensor range , point actuator range, point address, BACnet object, associated BIBBS (whe re applicable), and point connection terminal number. Typical schedules for multiple identical equipment are allowed unless otherwise requested in design or contract criteria.

1.4.1.3 Control System Components List

Provide a complete list of control system component s installed on this project. Include for each controller and device: control system schematic name, control system schematic designation, device description, manufacturer, and manufacturer part number. For se nsors, include point name, sensor range, and operating limits. For valv es, include body style, Cv, design flow rate, pressure drop, valve characte ristic (linear or equal percentage), and pipe connection size. For actuato rs, include point name, spring or non-spring return, modulating or two-posi tion action, normal (power fail) position, nominal control signal opera ting range (0-10 volts DC or 4-20 milliamps), and operating limits.

1.4.1.4 Control System Schematics

Provide control system schematics. Typical schemat ics for multiple identical equipment are allowed unless otherwise re quested in design or contract criteria. Include the following:

a. Location of each input and output device

b. Flow diagram for each piece of HVAC equipment

c. Name or symbol for each control system componen t, such as V-1 for a valve

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d. Setpoints, with differential or proportional ba nd values

e. Written sequence of operation for the HVAC equi pment

f. Valve and Damper Schedules, with normal (power fail) position

1.4.1.5 HVAC Equipment Electrical Ladder Diagrams

Provide HVAC equipment electrical ladder diagrams. Indicate required electrical interlocks.

1.4.1.6 Component Wiring Diagrams

Provide a wiring diagram for each type of input dev ice and output device.

Indicate how each device is wired and powered; show ing typical connections at the digital controller and power supply. Show f or all field connected devices such as control relays, motor starters, act uators, sensors, and transmitters.

1.4.1.7 Terminal Strip Diagrams

Provide a diagram of each terminal strip. Indicate the terminal strip location, termination numbers, and associated point names.

1.4.1.8 BACnet Communication Architecture Schematic

Provide a schematic showing the project's entire BA Cnet communication network, including addressing used for LANs, LAN de vices including routers and bridges, gateways, controllers, workstations, a nd field interface devices. If applicable, show connection to existin g networks.

1.5 SUBMITTALS

Submit detailed and annotated manufacturer's data, drawings, and specification sheets for each item listed, that cle arly show compliance with the project specifications.

Government approval is required for submittals with a "G" designation;

submittals not having a "G" designation are for Con tractor Quality Control approval. Submit the following in accordance with Section 01 33 00.

SD-02 Shop Drawings

Include the following in the project's control syst em drawing set :

Control system drawings title sheet; G

List of I/O Points; G

Control System Components List; G

Control system schematics; G

HVAC Equipment Electrical Ladder diagrams; G

Component wiring diagrams; G

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Terminal strip diagrams; G

BACnet communication architecture schematic; G

SD-03 Product Data

Direct Digital Controllers; G

Include BACnet PICS for each controller/device type , including smart sensors (B-SS) and smart actuators (B-SA).

BACnet Gateways; G

Include BACnet and workstation display information; bi-directional communication ability; compliance with interoperabi lity schedule;

expansion capacity; handling of alarms, events, sch eduling and trend data; and single device capability (not depen ding on multiple devices for exchanging information from ei ther side of the gateway).

BACnet Protocol Analyzer; G

Include capability to store and report data traffic on BACnet networks, measure bandwidth usage, filter informati on, and identify BACnet devices.

DDC Software; G

Sensors and Input Hardware; G

Air Flow Monitoring Station; G

Output Hardware; G

Surge and transient protection; G

Indicators; G

Duct smoke detectors; G

Variable frequency (motor) drives; G

SD-05 Design Data

Performance Verification Testing Plan; G

Pre-Performance Verification Testing Checklist; G

SD-06 Test Reports

Performance Verification Testing Report; G

SD-07 Certificates

Contractor's Qualifications; G

SD-09 Manufacturer's Field Reports

Pre-PVT Checklist; G

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SD-10 Operation and Maintenance Data

Comply with requirements for data packages in Secti on 01 78 23 OPERATION AND MAINTENANCE DATA, except as supplemen ted and modified in this specification.

BACnet Direct Digital Control Systems, Data Package 4; G

Controls System Operators Manuals, Data Package 4; G

VFD Service Manuals, Data Package 4; G

SD-11 Closeout Submittals

Training documentation; G

1.6 QUALITY ASSURANCE

1.6.1 Standard Products

Provide material and equipment that are standard ma nufacturer's products currently in production and supported by a local se rvice organization.

1.6.2 Delivery, Storage, and Handling

Handle, store, and protect equipment and materials to prevent damage before and during installation according to manufacturer's recommendations, and as approved by the Contracting Officer. Replace damag ed or defective items.

1.6.3 Operating Environment

Protect components from humidity and temperature va riation, dust, and contaminants. If components are stored before inst allation, keep them within the manufacturer's limits.

1.6.4 Finish of New Equipment

New equipment finishing shall be factory provided. Manufacturer's standard factory finishing shall be proven to withstand 125 hours in a salt-spray fog test. Equipment located outdoors shall be prov en to withstand 500 hours in a salt-spray fog test.

Salt-spray fog test shall be according to ASTM B117, with acceptance criteria as follows: immediately after completion o f the test, the finish shall show no signs of degradation or loss of adhes ion beyond 0.125 inch on either side of the scratch mark.

1.6.5 Verification of Dimensions

The contractor shall verify all dimensions in the f ield, and advise the Contracting Officer of any discrepancy before perfo rming work.

1.6.6 Contractor's Qualifications

Submit documentation certifying the controls Contra ctor performing the work has completed at least three DDC systems installati ons of a similar design to this project, and programmed similar sequences o f operation for at least two years.

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1.6.7 Modification of References

The advisory provisions in ASME B31.1 and NFPA 70 are mandatory.

Substitute "shall" for "should" wherever it appears and interpret all references to the "authority having jurisdiction" a nd "owner" to mean the Contracting Officer.

1.6.8 Project Sequence

The control system work for this project shall proc eed in the following order:

a. Submit and receive approval on the Shop Drawing s, Product Data, and Certificates specified under the paragraph entitled "SUBMITTALS."

b. Perform the control system installation work, i ncluding all field check-outs and tuning.

c. Provide support to TAB personnel as specified u nder the paragraph "TEST

AND BALANCE SUPPORT."

d. Submit and receive approval of the Controls Sys tem Operators Manual specified under the paragraph "CONTROLS SYSTEM OPER ATORS MANUALS."

e. Submit and receive approval of the Performance Verification Testing Plan and the Pre-PVT Checklist specified under the paragraph

"PERFORMANCE VERIFICATION TESTING."

f. Perform the Performance Verification Testing.

g. Submit and receive approval on the PVT Report.

h. Submit and receive approval on the Training Doc umentation specified under the paragraph "INSTRUCTION TO GOVERNMENT PERS ONNEL" and "VFD Service Support". Submit at least 30 days before t raining.

i. Deliver the final Controls System Operators Man uals and VFD Service Manuals.

j. Conduct the Phase I Training and VFD on-site/ha nds-on training.

k. Conduct the Phase II Training.

l. Submit and receive approval of Closeout Submitt als.

PART 2 PRODUCTS

2.1 DDC SYSTEM

a. Provide a networked DDC system for stand-alone control in compliance with the latest revision of the ASHRAE 135 BACnet standard. Include all programming, objects, and services required to meet the sequence of control. Provide BACnet communications between the DDC system and native BACnet devices furnished with HVAC equipment and plant equipment including boilers, chillers, and variable frequency drives. Devices provided shall be certified in the BACnet Testing L aboratories (BTL) Product Listing.

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2.1.1 Direct Digital Controllers

Direct digital controllers shall be UL 916 rated.

2.1.1.1 I/O Point Limitation

The total number of I/O hardware points used by a s ingle stand-alone digital controller, including I/O expansion units, shall not exceed 64, except for complex individual equipment or systems. Place I/O expansion units in the same cabinet as the digital controller .

2.1.1.2 Environmental Limits

Controllers shall be suitable for, or placed in pro tective enclosures suitable for the environment (temperature, humidity , dust, and vibration) where they are located.

2.1.1.3 Stand-Alone Control

Provide stand-alone digital controllers.

2.1.1.4 Internal Clock

Provide internal clocks for all BACnet Building Con trollers (B-BC) and BACnet Advanced Application Controllers (B-AAC) usi ng BACnet time synchronization services. Automatically synchroniz e system clocks daily from an operator-designated controller. The system shall automatically adjust for daylight saving time.

2.1.1.5 Memory

Provide sufficient memory for each controller to su pport the required control, communication, trends, alarms, and message s. Protect programs residing in memory with EEPROM, flash memory, or by an uninterruptible power source (battery or uninterruptible power supp ly). The backup power source shall have capacity to maintain the memory d uring a 72-hour continuous power outage. Rechargeable power source s shall be constantly charged while the controller is operating under nor mal line power.

Batteries shall be replaceable without soldering. Trend and alarm history collected during normal operation shall not be lost during power outages less than 72 hours long.

2.1.1.6 Immunity to Power Fluctuations

Controllers shall operate at 90 percent to 110 perc ent nominal voltage rating.

2.1.1.7 Transformer

The controller power supply shall be fused or curre nt limiting and rated at 125 percent power consumption.

2.1.1.8 Wiring Terminations

Use screw terminal wiring terminations for all fiel d-installed controllers. Provide field-removable modular termi nal strip or a

SECTION 23 09 23.13 20 Page 13 termination card connected by a ribbon cable for al l controllers other than terminal units.

2.1.1.9 Input and Output Interface

Provide hard-wired input and output interface for a ll controllers as follows:

a. Protection: Shorting an input or output point to itself, to another point, or to ground shall cause no controller damag e. Input or output point contact with sources up to 24 volts AC or DC for any duration shall cause no controller damage.

b. Binary Inputs: Binary inputs shall have a togg le switch and monitor on and off contacts from a "dry" remote device without external power, and external 5-24 VDC voltage inputs.

c. Pulse Accumulation Inputs: Pulse accumulation inputs shall conform to binary input requirements and accumulate pulses at a resolution suitable to the application.

d. Analog Inputs: Analog inputs shall monitor low -voltage (0-10 VDC), current (4-20 mA), or resistance (thermistor or RTD ) signals.

e. Binary Outputs: Binary outputs shall have a to ggle switch and send a pulsed 24 VDC low-voltage signal for modulation con trol, or provide a maintained open-closed position for on-off control. For HVAC equipment and plant controllers, provide for manual overrides , either with three-position (on-off-auto) override switches and status lights, or with an adjacent operator display and interface. W here appropriate, provide a method to select normally open or normall y closed operation.

f. Analog Outputs: Analog outputs shall send modu lating 0-10 VDC or 4-20 mA signals to control output devices.

g. Tri-State Outputs: Tri-State outputs shall pro vide three-point floating control of terminal unit electronic actuat ors.

2.1.1.10 Digital Controller BACnet Internetwork

Provide a BACnet internetwork with control products , communication media, connectors, repeaters, hubs, and routers. Provide intermediate gateways, only when requested by the Government and shown on the contract drawings, to connect existing non-BACnet devices to the BACne t internetwork.

Controller and operator interface communication sha ll conform to ASHRAE 135, BACnet. Use the building's existing Ethernet backb one for network segments marked "existing" on project drawings. Coordinate connections to existing Ethernet backbones with the BAS Owner and LAN admin istrator. If a controller becomes non-responsive, the remaining co ntrollers shall continue operating and not be affected by the failed control ler.

2.1.1.11 Communications Ports

a. Direct-Connect Interface Ports: Provide at lea st one extra communication port at each local BACnet network for direct connecting a notebook computer or BACnet hand-held terminal so a ll network BACnet objects and properties may be viewed and edited by the operator.

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b. Telecommunications Interface Port: Provide one telecommunication port per building, permitting remote communication via p oint-to-point (PTP) protocol over telephone lines.

2.1.1.12 Modems

Provide v.92 modems where required for communicatio n between the BACnet Operator Workstation (B-OWS) and the DDC system.

2.1.1.13 BACnet Gateways

Provide BACnet communication ports, whenever availa ble as a plant equipment OEM standard option, for DDC integration via a sing le communication cable.

Typical BACnet controlled plant equipment includes, but is not limited to, boilers, chillers, and variable frequency motor dri ves.

Provide gateways to connect BACnet to legacy system s, existing non-BACnet devices, and existing non-BACnet DDC controlled pla nt equipment, only when specifically requested and approved by the Governme nt, and shown on the Government approved BACnet Communication Architectu re Schematic. Provide with each gateway an interoperability schedule , sh owing each point or event on the legacy side that the BACnet "client" w ill read, and each parameter that the BACnet network will write to. D escribe this interoperability in terms of BACnet services, or In teroperability Building Blocks (BIBBS), defined in ASHRAE 135 Annex K. Provide two-year minimum warranty for each gateway, including parts and labo r.

The following minimum capabilities are required:

a. Gateways shall be able to read and view all rea dable object properties listed in the interoperability schedule on the non- BACnet network to the BACnet network and vice versa where applicable.

b. Gateways shall be able to write to all writeabl e object properties listed in the interoperability schedule on the non- BACnet network from the BACnet network and vice versa where applicable.

c. Gateways shall provide single-pass (only one pr otocol to BACnet without intermediary protocols) translation from the non-BA Cnet protocol to BACnet and vice versa.

d. Gateways shall meet the requirements of Data Sh aring Read Property (DS-RP-B), Data Sharing Write Property (DS-WP-B), D evice Management Dynamic Device Binding-B (DM-DDB-B), and Device Man agement Communication Control (DM-DCC-B) BIBBs, in accordan ce with ASHRAE 135.

e. Gateways shall include all hardware, software, software licenses, and configuration tools for operator-to-gateway communi cations. Provide backup programming and parameters on CD media and t he ability to modify, download, backup, and restore gateway confi guration.

2.1.1.14 Digital Controller Cabinet

Provide each digital controller in a factory fabric ated cabinet enclosure.

Cabinets located indoors shall protect against dust and have a minimum NEMA 1 rating, except where indicated otherwise. Cabine ts located outdoors or

SECTION 23 09 23.13 20 Page 15 in damp environments shall protect against all outd oor conditions and have a minimum NEMA 4 rating. Outdoor control panels an d controllers must be able to withstand extreme ambient conditions, witho ut malfunction or failure, whether or not the controlled equipment is running. If necessary, provide a thermostatically controlled panel heater in freezing locations, and an internal ventilating fan in locations expose d to direct sunlight.

Cabinets shall have a hinged lockable door and an o ffset removable metal back plate, except controllers integral with termin al units, like those mounted on VAV boxes. Provide like-keyed locks for all hinged panels provided and a set of two keys at each panel, with one key inserted in the lock.

2.1.1.15 Main Power Switch and Receptacle

Provide each control cabinet with a main external p ower on/off switch located inside the cabinet. Also provide each cabi net with a separate 120 VAC duplex receptacle.

2.1.2 DDC Software

2.1.2.1 Programming

Provide programming to execute the sequence of oper ation indicated.

Provide all programming and tools to configure and program all controllers. Provide programming routines in simpl e, easy-to-follow logic with detailed text comments describing what the log ic does and how it corresponds to the project's written sequence of op eration.

a. Graphic-based programming shall use a library o f function blocks made from pre-programmed code designed for BAS control. Function blocks shall be assembled with interconnecting lines, depi cting the control sequence in a flowchart. If providing a computer w ith device programming tools as part of the project, graphic p rograms shall be viewable in real time showing present values and lo gical results from each function block.

b. Menu-based programming shall be done by enterin g parameters, definitions, conditions, requirements, and constrai nts.

c. For line-by-line and text-based programming, de clare variable types (local, global, real, integer, etc.) at the beginni ng of the program.

Use descriptive comments frequently to describe the programming.

d. If providing a computer with device programming tools as part of the project, provide a means for detecting program erro rs and testing software strategies with a simulation tool. Simula tion may be inherent within the programming software suite, or provided by physical controllers mounted in a NEMA 1 test enclosure. Th e test enclosure shall contain one dedicated controller of each type provided under this contract, complete with power supply and relevant a ccessories.

2.1.2.2 Parameter Modification

All writeable object properties, and all other prog ramming parameters needed to comply with the project specification sha ll be adjustable for devices at any network level, including those acces sible with web-browser communication, and regardless of programming method s used to create the applications.

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2.1.2.3 Short Cycling Prevention

Provide setpoint differentials and minimum on/off t imes to prevent equipment short cycling.

2.1.2.4 Equipment Status Delay

Provide an adjustable delay from when equipment is commanded on or off and when the control program looks to the status input for confirmation.

2.1.2.5 Run Time Accumulation

Use the Elapsed Time Property to provide re-settabl e run time accumulation for each Binary Output Object connected to mechanic al loads greater than 1 HP, electrical loads greater than 10 KW, or whereve r else specified.

2.1.2.6 Timed Local Override

Provide an adjustable override time for each push o f a timed local override button.

2.1.2.7 Time Synchronization

Provide time synchronization, including adjustments for leap years, daylight saving time, and operator time adjustments .

2.1.2.8 Scheduling

Provide operating schedules as indicated, with equi pment assigned to groups. Changing the schedule of a group shall cha nge the operating schedule of all equipment in the group. Groups sha ll be capable of operator creation, modification, and deletion. Pro vide capability to view and modify schedules in a seven-day week format. P rovide capability to enter holiday and override schedules one full year at a time.

2.1.2.9 Object Property Override

Allow writeable object property values to accept ov errides to any valid value. Where specified or required for the sequenc e of control, the Out-Of-Service property of Objects shall be modifia ble using BACnet's write property service. When documented, exceptions to t hese requirement are allowed for life, machine, and process safeties.

2.1.2.10 Alarms and Events

Alarms and events shall be capable of having progra mmed time delays and high-low limits. When a computer workstation or we b server is connected to the BACnet internetwork, alarms/events shall report to the computer, printer, e-mail,or cell phone, as defined by an aut horized operator.

Otherwise alarms/events shall be stored within a de vice on the BACnet network until connected to a user interface device and retrieved. Provide alarms/events in agreement with the point schedule, sequence of operation, and the BAS Owner. At a minimum, provide programmi ng to initiate alarms/events any time a piece of equipment fails t o operate, a control point is outside normal range or condition shown on schedules, communication to a device is lost, a device has fai led, or a controller has lost its memory.

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2.1.2.11 Trending

Provide BACnet trend services capable of trending a ll object present values set points, and other parameters indicated for tren ding on project schedules. Trends may be associated into groups, a nd a trend report may be set up for each group. Trends are stored within a device on the BACnet network, with operator selectable trend intervals f rom 10 seconds up to 60 minutes. The minimum number of consecutive trend v alues stored at one time shall be 100 per variable. When trend memory is fu ll, the most recent data shall overwrite the oldest data.

The operator workstation shall upload trends automa tically upon reaching 3/4 of the device buffer limit (via Notification_Th reshold property), by operator request, or by time schedule for archiving . Archived and real-time trend data shall be available for viewing numerically and graphically for at the workstation and connected n otebook computers.

2.1.2.12 Device Diagnostics

Each controller shall have diagnostic LEDs for powe r, communication, and device fault condition. The DDC system shall recog nize and report a non-responsive controller.

2.1.2.13 Power Loss

Upon restoration of power, the DDC system shall per form an orderly restart and restoration of control.

2.1.3 BACnet Protocol Analyzer

Provide a BACnet protocol analyzer and required cab les and fittings for connection to the BACnet network. The analyzer sha ll include the following minimum capabilities:

a. Capture and store to a file data traffic on all network levels.

b. Measure bandwidth usage.

c. Filtering options with ability to ignore select traffic.

2.2 SENSORS AND INPUT HARDWARE

Coordinate sensor types with the BAS Owner to keep them consistent with existing installations.

2.2.1 Field-Installed Temperature Sensors

Where feasible, provide the same sensor type throug hout the project. Avoid using transmitters unless absolutely necessary.

2.2.1.1 Thermistors

Precision thermistors may be used in applications b elow 200 degrees F.

Sensor accuracy over the application range shall be 0.36 degree F or less between 32 to 150 degrees F. Stability error of th e thermistor over five years shall not exceed 0.25 degrees F cumulative. A/D conversion resolution error shall be kept to 0.1 degrees F. T otal error for a thermistor circuit shall not exceed 0.5 degrees F.

SECTION 23 09 23.13 20 Page 18

2.2.1.2 Resistance Temperature Detectors (RTDs)

Provide RTD sensors with platinum elements compatib le with the digital controllers. Encapsulate sensors in epoxy, series 300 stainless steel, anodized aluminum, or copper. Temperature sensor a ccuracy shall be 0.1 percent (1 ohm) of expected ohms (1000 ohms) at 32 degrees F. Temperature sensor stability error over five years shall not ex ceed 0.25 degrees F cumulative. Direct connection of RTDs to digital c ontrollers without transmitters is preferred. When RTDs are connected directly, lead resistance error shall be less than 0.25 degrees F. The total error for a RTD circuit shall not exceed 0.5 degrees F.

2.2.1.3 Temperature Sensor Details

a. Room Type: Provide the sensing element compone nts within a decorative protective cover suitable for surrounding decor. P rovide room temperature sensors with timed override button, set point adjustment lever, digital temperature display. Provide a commu nication port or 802.11x wireless support for a portable operator in terface like a notebook computer or PDA.

b. Duct Probe Type: Ensure the probe is long enou gh to properly sense the air stream temperature.

c. Duct Averaging Type: Continuous averaging sens ors shall be one foot in length for each 4 square feet of duct cross-section al area, and a minimum length of 6 feet.

d. Pipe Immersion Type: Provide minimum three-inc h immersion. Provide each sensor with a corresponding pipe-mounted senso r well, unless indicated otherwise. Sensor wells shall be stainle ss steel when used in steel piping, and brass when used in copper pipi ng. Provide the sensor well with a heat-sensitive transfer agent be tween the sensor and the well interior.

e. Outside Air Type: Provide the sensing element on the building's north side with a protective weather shade that positions the sensor approximately 3 inches off the wall surface, does n ot inhibit free air flow across the sensing element, and protects the s ensor from snow, ice, and rain.

2.2.2 Transmitters

Provide transmitters with 4 to 20 mA or 0 to 10 VDC linear output scaled to the sensed input. Transmitters shall be matched to the respective sensor, factory calibrated, and sealed. Size transmitters for an output near 50 percent of its full-scale range at normal operating conditions. The total transmitter error shall not exceed 0.1 percent at a ny point across the measured span. Supply voltage shall be 12 to 24 vo lts AC or DC.

Transmitters shall have non-interactive offset and span adjustments. For temperature sensing, transmitter drift shall not ex ceed 0.03 degrees F a year.

2.2.2.1 Relative Humidity Transmitters

Provide transmitters with an accuracy equal to plus or minus 3 percent from 0 to 90 percent scale, and less than one percent dr ift per year. Sensing elements shall be the polymer type.

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2.2.2.2 Pressure Transmitters

Provide transmitters integral with the pressure tra nsducer.

2.2.3 Current Transducers

Provide current transducers to monitor motor ampera ge, unless current switches are shown on design drawings or point tabl es.

2.2.4 Input Switches

2.2.4.1 Timed Local Overrides

Provide buttons or switches to override the DDC occ upancy schedule programming for each major building zone during uno ccupied periods, and to return HVAC equipment to the occupied mode. This r equirement is waived for zones clearly intended for 24 hour continuous opera tion.

2.2.5 Freeze Protection Thermostats

Provide special purpose thermostats with flexible c apillary elements 20 feet minimum length for coil face areas up to 40 sq uare feet. Provide longer elements for larger coils at 1-foot of eleme nt for every 4 square feet of coil face area, or provide additional therm ostats. Provide switch contacts rated for the respective motor starter's c ontrol circuit voltage.

Include auxiliary contacts for the switch's status condition. A freezing condition at any 18-inch increment along the sensin g element's length shall activate the switch. The thermostat shall be equip ped with a manual push-button reset switch so that when tripped, the thermostat requires manual resetting before the HVAC equipment can rest art.

2.2.6 Air Flow Monitoring Station

Air flow measurement stations shall have an array o f velocity sensing elements and straightening vanes inside a flanged s heet metal casing. The velocity sensing elements shall be the RTD or therm istor type, traversing the ducted air in at least two directions. The air flow pressure drop across the station shall not exceed 0.08 inch water gage at a velocity of 2,000 fpm. The station shall be suitable for air f lows up to 5,000 fpm, and a temperature range of 40 to 120 degrees F. Th e station's measurement accuracy over the range of 125 to 2,500 fpm shall b e plus or minus 3 percent of the measured velocity. Station transmit ters shall provide a linear, temperature-compensated 4 to 20 mA or 0 to 10 VDC output. The output shall be capable of being accurately convert ed to a corresponding air flow rate in cubic feet per minute. Transmitte rs shall be a 2-wire, loop powered device. The output error of the trans mitter shall not exceed

0.5 percent of the measurement.

2.3 OUTPUT HARDWARE

2.3.1 Control Dampers

Provide factory manufactured galvanized steel dampe rs where indicated. Control dampers shall comply with SMACNA 1966 except as modified or supplemented by this specification. Published da mper leakage rates and respective pressure drops shall have been verified by tests in compliance with AMCA 500-D requirements.

SECTION 23 09 23.13 20 Page 20

Provide damper assembly frames constructed of 0.064 inch minimum thickness galvanized steel channels with mitered an d welded corners. Damper axles shall be 0.5 inches minimum diameter plated s teel rods supported in the damper frame by stainless steel or bronze beari ngs. Blades mounted vertically shall be supported by thrust bearings.

Dampers shall be rated for not less than 2000 fpm a ir velocity. The pressure drop through each damper when full-open sh all not exceed 0.04 inches water gage at 1000 fpm face velocity. Damper assemblies in ductwork subject to above 3-inch water gauge static air pres sure shall be constructed to meet SMACNA Seal Class "A" construct ion requirements.

Provide the damper operating linkages outside of th e air stream, including crank arms, connecting rods, and other hardware tha t transmits motion from the damper actuators to the dampers, shall be adjus table. Additionally, operating linkages shall be designed and constructe d to have a 2 to 1 safety factor when loaded with the maximum required damper operating force.

Linkages shall be brass, bronze, galvanized steel, or stainless steel.

Provide access doors or panels in hard ceilings and walls for access to all concealed damper operators and damper locking setsc rews.

For field-installed control dampers, a single dampe r section shall have blades no longer than 48 inches and no higher than 72 inches. The maximum damper blade width shall be 12 inches. Larger sized dampers shall be built using a combination of sections.

Frames shall be at least 2 inches wide. Flat blades shall have edges folded for rigidity. Blades shall be provided with compres sible gasket seals along the full length of the blades to prevent air leakag e when closed.

The damper frames shall be provided with jamb seals to minimize air leakage. Seals shall be suitable for an operating temperature range of minus 40 degrees F to 200 degrees F.

The leakage rate of each damper when full-closed sh all be no more than 3 cfm per sq. foot of damper face area at

1.0 inches water gage static pressure.

2.3.2 Control Valves

2.3.2.1 Valve Assembly

Valve bodies shall be designed for 125 psig minimum working pressure or 150 percent of the operating pressure, whichever is gre ater. Valve stems shall be Type 316 stainless steel. Valve leakage ratings shall be 0.01 percent of rated Cv value. Class 125 copper alloy valve bo dies and Class 150 steel or stainless steel valves shall meet the requiremen ts of ASME B16.5 . Cast iron valve components shall meet the requirements o f ASTM A126 Class B or C.

2.3.2.2 Butterfly Valves

Butterfly valves shall be the threaded lug type sui table for dead-end service and for modulation to the fully-closed posi tion, with stainless steel shafts supported by bearings, non-corrosive d iscs geometrically interlocked with or bolted to the shaft (no pins), and EPDM seats suitable for temperatures from minus 20 degrees F to plus 25 0 degrees F. Valves shall have a means of manual operation independent of the actuator.

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2.3.2.3 Two-Way Valves

Two-way modulating valves shall have an equal perce ntage characteristic.

2.3.2.4 Three-Way Valves

Three-way valves shall have an equal percentage cha racteristic.

2.3.2.5 Valves for Chilled Water, Condenser Water, and Glyc ol Fluid Service

a. Bodies for valves 1-1/2 inches and smaller shal l be brass or bronze, with threaded or union ends. Bodies for valves fro m 2 inches to 3 inches inclusive shall be of brass, bronze, or iron . Bodies for 2 inch valves shall have threaded connections. Bodies for valves from 2-1/2 to 3 inches shall have flanged connections.

b. Internal valve trim shall be brass or bronze, e xcept that valve stems shall be stainless steel.

c. Unless indicated otherwise, provide modulating valves sized for 2 psi minimum and 4 psi maximum differential across the v alve at the design flow rate.

d. Valves 4 inches and larger shall be butterfly v alves, unless indicated otherwise.

2.3.2.6 Valves for Hot Water Service

Valves for hot water service below 250 Degrees F:

a. Bodies for valves 1-1/2 inches and smaller shal l be brass or bronze, with threaded or union ends. Bodies for valves fro m 2 inches to 3 inches inclusive shall be of brass, bronze, or iron . Bodies for 2 inch valves shall have threaded connections. Bodies for valves from 2-1/2 to 3 inches shall have flanged connections.

b. Internal trim (including seats, seat rings, mod ulation plugs, valve stems, and springs) of valves controlling water abo ve 210 degrees F shall be Type 316 stainless steel.

c. Internal trim for valves controlling water 210 degrees F or less shall be brass or bronze. Valve stems shall be Type 316 stainless steel.

d. Non-metallic parts of hot water control valves shall be suitable for a minimum continuous operating temperature of 250 deg rees F or 50 degrees F above the system design temperature, whichever is higher.

e. Unless indicated otherwise, provide modulating valves sized for 2 psi minimum and 4 psi maximum differential across the v alve at the design flow rate.

f. Valves 4 inches and larger shall be butterfly v alves, unless indicated otherwise.

2.3.2.7…