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HVAC DESIGN by zku40248

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									TARRANT COUNTY COLLEGE DISTRICT DESIGN STANDARDS
DIVISION 25 – INTEGRATED AUTOMATION



                                  DIVISION 25 – INTEGRATED AUTOMATION


25.01    CONTROLS

         25.01.1         GENERAL
                         The Tarrant County College District (TCCD) Facilities Board (FB), or its
                         representative(s), will review design work to the extent necessary to assure
                         compliance with TCCD Design Standards and applicable codes. The FB will not
                         undertake a detailed technical review of your work. The FB must approve any
                         deviations from the TCCD Design Standards.
                         As a design professional it is your responsibility to ensure code compliance,
                         completeness, and correctness of the design, cost estimate, and all engineering
                         concepts and details of the work. This responsibility includes the coordination of the
                         various architectural, civil, structural, mechanical, electrical, and other subdivisions
                         with each other and with the specifications.
                         You should expect a more thorough review than that given by a ‘typical’ client. Even
                         so, the FB's review, approval or acceptance of, and payment for the design services
                         cannot be construed as a waiver of any rights under the design agreement.
                         If the FB determines that a design submittal is unacceptable, a re-submittal will be
                         required. Before re-submittal, your representative(s) will meet with the FB or its
                         representative(s), at no additional cost to TCCD, to resolve any issue(s) with the
                         design.
                         During the construction phase of the project the FB or their representative(s) will
                         review all project submittals; again you should expect a more thorough review than
                         that given by a ‘typical’ client.
                         If the FB determines that a submittal, or a portion of a submittal, is unacceptable, a
                         re-submittal will be required. Before re-submittal, your representative(s) will meet with
                         the FB or its representative(s), at no additional cost to TCCD, to resolve any issue(s)
                         with the submittal.
         25.01.2         INTRODUCTION
                         A.   This section is intended to convey the minimum performance requirements
                              related to the Building Automation System (BAS) for automation and supervision
                              of mechanical systems operations. Confirm specific controls requirements and
                              goals with the FB, IN WRITING, early in the design process.
                         B.   The BAS includes the hardware, firmware and software necessary to obtain the
                              performance requirements by function and system components for operation,
                              reliability, security, packaging, control sequencing, scheduling, loop tuning,
                              interlocks, system integrations.
                         C.   The BAS includes equipment such as operator workstations, sensors, meters,
                              transmitters, valves, dampers, actuators, direct digital control (DDC) panels and
                              controllers, relays, terminal equipment, thermowells, wiring, cabling, circuit
                              breakers, panel boards, power supplies, and transformers.
         25.01.3         REFERENCE CODES AND REGULATIONS
                         A.   ANSI C63.12 – Recommended Practice on Electromagnetic Compatibility
                              Limits.
                         B.   ANSI/HFS 100 – Human Factors Engineering of Visual display Terminal
                              Workstations.



Issued January 31,2009                                                                              25 00 00 1/27
TARRANT COUNTY COLLEGE DISTRICT DESIGN STANDARDS
DIVISION 25 – INTEGRATED AUTOMATION


                         C.   ASHRAE 135 – Data Communication Protocol for Building, Automation, and
                              Control of Networks.
                         D.   LonTalk – Data Communication Protocol for Building, Automation.
                         E.   ASME B 40.1 – Gages – Pressure Indicating Dial Type – Elastic Element.
                         F.   ASME B 40.3 – bimetallic Actuated Thermometers.
                         G.   ASME MC85.1 – Terminology for Automatic Control.
                         H.   ASTM B-88 – Seamless Copper Water Tube.
                         I.   ASTM E 1 – Standard Specification for ASTM Thermometers.
                         J.   Code of Federal Regulations, 47CFR, Parts 15 and 18, Federal
                              Communications Commission (FCC) Rules and Regulations pertaining to EMI.
                         K.   FCI 70-2 – Fluid Controls Institute, Control Valve Seat Leakage.
                         L.   ICEA S-95-658/NEMA WC70 – Non-shielded 0-2kV Cables.
                         M.   IEEE 802.3 – Carrier Sense Multiple Access with Collision Detection Access
                              Method and Physical Layer Specifications.
                         N.   IEEE 1100 – Recommended Practice for Powering and Grounding Sensitive
                              Electronic Equipment.
                         O.   ISA 5.1 – Instrumentation Symbols and Identification.
                         P.   ISA 75.01 – Flow Equations for Sizing Control Valves.
                         Q.   ISA 75.05 – Control Valve Terminology.
                         R.   NEMA EMC1 – Energy Management Systems Definitions.
                         S.   NEMA TC 7 – Smooth Wall Coilable Polyethylene Electrical Plastic Conduit.
                         T.   NEMA 250 – Enclosures for Electrical Equipment.
                         U.   NFPA 70 - National Electrical Code.
                         V.   TIA/EIA-455-59 – Measurement of Fiber Point Defects Using an OTDR.
                         W.   UL 44 – Thermoset-Insulated Wires and Cables.
                         X.   UL 916 – Energy Management Equipment.
                         Y.   UL 1277 – Electrical Power and Cable Tray Cables with Optional Optic Fiber
                              Members.
                         Z.   UL 2024 – Optical Fiber Cable Raceway.
                         AA. Refer to section 2.0 CODES & STANDARDS for list of additional codes and
                             standards.
                         BB. Appendix A – Typical Sequence of Operations for HVAC Equipment.
                         CC. Appendix B – Typical I/O Points List.
         25.01.4         RELATED SECTIONS
                         A.   Chapter 23 – Heating, Ventilating, and Air Conditioning.
                         B.   Chapter 26 – Electrical.
                         C.   Chapter 27 – Communications.
                         D.   Chapter 28 – Electronic Safety and Security.
         25.01.5         GENERAL CONTROLS REQUIREMENTS



Issued January 31,2009                                                                           25 00 00 2/27
TARRANT COUNTY COLLEGE DISTRICT DESIGN STANDARDS
DIVISION 25 – INTEGRATED AUTOMATION


                         A.   DEFINITIONS
                              1.   ALGORITHM: A software procedure for solving a recurrent mathematical
                                   or logical problem.
                              2.   ANALOG: A continuously varying signal or value (temperature, current,
                                   velocity, etc.).
                              3.   BINARY (ALSO REFERRED TO AS DIGITAL OR DICRETE): A two-state
                                   system where an "ON" condition is represented by a high signal level and
                                   an "OFF" condition is represented by a low signal level.
                              4.   CABLE/WIRING: Includes conduit, cables, wire and wiring devices to
                                   connect field sensors, transmitters, and equipment panels to the
                                   automation system controllers and computer equipment. Includes
                                   input/output points defined in the Points List summary or specified herein
                                   and required to execute the sequence of operation. Includes necessary
                                   cable/wiring for signals, control and power to/from the BAS related
                                   equipment.
                              5.   CONTROL PROCESS: The hardware, firmware and software required to
                                   perform a complete control loop from input signal to interlock logic, process
                                   calculation to final output signal control.
                              6.   DEADBAND: The range through which an input can be varied without
                                   initiating observable response; usually expressed in percent of span.
                              7.   DIAGNOSTIC PROGRAM: Software that is used to detect and isolate
                                   system and component malfunctions.
                              8.   DIGITAL CONTROLLER: A device which operates automatically to
                                   regulate a controlled variable. The control module is microprocessor
                                   based, programmable by the user, has integral I/O, and performs stand-
                                   alone operations.
                              9.   DIRECT DIGITAL CONTROL (DDC): Closed loop control of HVAC
                                   equipment by a digital controller as defined in this document. The controller
                                   directly senses building environment and makes control decisions based
                                   on user defined, controller resident programs. The controller outputs
                                   control signals that directly operate valves, dampers, and motor controllers.
                                   No conventional electronic control devices, such as receiver controllers,
                                   thermostats, and logic units are present within or interface with a direct
                                   digital control loop. Actuators are pneumatic or electric and the controller
                                   output is converted to the appropriate type of signal.
                              10. DDC SYSTEM: A system made up of one or more digital controllers.
                                  Required climate control and energy management functions for complete
                                  operation of an HVAC system are provided by DDC from digital controllers.
                                  No conventional control devices (electronic) such as receiver controllers,
                                  thermostats, and logic units are used. Digital controllers in a system are
                                  linked in a communications network composed of one or more levels of
                                  local area networks (LAN).
                              11. DISTRIBUTED CONTROL (NOT CENTRALIZED CONTROL): A system
                                  configuration where the controllers are installed near the equipment being
                                  controlled, and to distribute the processing to each stand alone DDC panel.
                                  The control system is built up of stand alone controllers, with the total
                                  number of utilized sensor inputs and control outputs to be forty eight or less
                                  per controller. Controller I/O points are to be distributed/segregated as
                                  needed to preclude a single point of failure impacting more than one major




Issued January 31,2009                                                                            25 00 00 3/27
TARRANT COUNTY COLLEGE DISTRICT DESIGN STANDARDS
DIVISION 25 – INTEGRATED AUTOMATION


                              piece of equipment (e.g., redundant chilled water pumps are not connected
                              to a single controller).
                         12. DYNAMIC CONTROL: A process that optimizes operation of HVAC
                             systems (air handling units, converters, chillers, and boilers) by increasing
                             and decreasing setpoints or starting and stopping equipment in response
                             to heating and cooling needs of downstream equipment. A requirement of
                             dynamic control is knowing the heating/cooling demand status of
                             downstream equipment, therefore dynamic control requires controllers
                             connected in a communications network.
                         13. FACILITIES MANAGEMENT CONTROL SYSTEM (BAS): The entire
                             system of hardware, firmware, and software specifically designed to
                             centrally manage building HVAC and related utilities. The BAS includes
                             the DDC subsystem, open system ports, and open protocol bus or
                             integrators and network routers for connection to information networks.
                         14. BAS CONTRACTOR: The Facility Management System Contractor
                             responsible for the installation, testing and integration of the Facility
                             Management System specified herein.
                         15. FIRMWARE: Firmware is software programmed into read only memory
                             (ROM) and erasable programmable read only memory (EPROM) chips.
                             Software may not be changed without physically altering the chip.
                         16. GATEWAY: A software and hardware package that allows incompatible
                             protocols to communicate.
                         17. GRAPHIC SEQUENCE OF OPERATION: A drawing or graphic showing all
                             the interlocks and control loop sequences between the input and output
                             points. Graphic sequence of operation is a graphical representation of the
                             sequence of operation. The graphic sequence of operation will show all
                             inputs, outputs, logic blocks and how they are connected.
                         18. HAND HELD TERMINAL: A portable device which can be connected
                             directly to a communications port, or via wireless technology, on a digital
                             controller to interrogate, program and control system parameters.
                         19. HUB: Concentrator or repeater at which node connections meet in a star
                             topology. Some Hubs may be intelligent and have processing capabilities.
                         20. HUMAN MACHINE INTERFACE (HMI): This includes the graphical
                             displays, controls to access information, method to program displays and
                             modify the control system sequence of operations. Graphical displays
                             depict system information in both drawing and alphanumeric format. The
                             displays will mimic system PID control logic and display system variable
                             analog values and digital states.
                         21. INPUT/OUTPUT (I/O): Refers to signals that are received from or
                             transmitted by sensors and controllers. Signals are classified as analog
                             inputs (AI) digital inputs (DI), analog outputs (AO), and digital outputs (DO)
                             in a digital/controller. Inputs are from analog sensors (temperature,
                             pressure, humidity, flow) and digital sensors (motor status, flow switches,
                             valve position, and pulse output devices). Analog outputs operate devices
                             such as modulating valves and digital outputs operate on/off control
                             devices.
                         22. INTEGRATION: The ability of control systems components from different
                             manufacturers to connect together and provide coordinated control via
                             real-time data exchange through a common communications data
                             exchange protocol. Integration extends to operator’s workstation software,
                             which supports user interaction with the control system equipment.




Issued January 31,2009                                                                       25 00 00 4/27
TARRANT COUNTY COLLEGE DISTRICT DESIGN STANDARDS
DIVISION 25 – INTEGRATED AUTOMATION


                         23. INTEROPERABILITY: Ability for multiple devices on a bus network to
                             transmit and share data.
                         24. I/O UNIT (DISTRIBUTED OR REMOTE): An I/O unit separate from the
                             digital controller that provides additional point capacity to and
                             communicates with the digital controller on a LAN. An I/O unit is not stand
                             alone because the control program does not reside in the I/O units
                             microprocessor.
                         25. LOCAL AREA NETWORK (LAN):
                              a. A communications bus that interconnects digital controllers for peer to
                                   peer communications. Different levels of LANs are possible within a
                                   single BAS system. In this case a digital controller on a higher level
                                   LAN acts as a network controller to the controllers on the lower level
                                   LAN.      The network controller, then, has at least two (2) LAN
                                   communications ports.           One (1) port supports peer to peer
                                   communications with other digital controllers on the higher level LAN.
                                   The other port supports communications with the digital controllers on
                                   the lower level LAN.
                              b. LANs permit sharing global information, make it possible to apply
                                   building wide control strategies such as peak demand limiting, permit
                                   dynamic control strategies, allow coordinated response to alarm
                                   conditions, and permit remote monitoring and programming of digital
                                   controllers.
                         26. LOOP: A combination of two (2) or more instruments or control functions
                             arranged so that signals pass from one to another for the purpose of
                             measurement and/or control of a process variable.
                         27. MICROPROCESSOR: A microprocessor refers to the central processing
                             unit (CPU) that contains all the registers and logic circuitry that make it
                             possible for digital controllers to do computing.
                         28. NETWORK: A system of distributed controllers that are linked together on
                             a communications bus. The network allows sharing of point information
                             and provides a means for central monitoring of the system.
                         29. OPC (OBJECT LINKING AND EMBEDDING [OLE] FOR PROCESS
                             CONTROLS): This is a non-proprietary technical specification that defines
                             a set of standard interfaces based upon Microsoft’s OLE/COM/DCOM
                             (component object model) technology. The application of the OPC
                             standard      interface     makes       possible  interoperability    between
                             automation/control applications, field systems/devices and business office
                             applications.
                         30. OPEN ARCHITECTURE: A control system architecture that is compatible
                             with hardware and software from multiple vendors/manufacturers.
                         31. OPEN SYSTEM PORT (OSP): A user programmable communications port
                             that provides the ability to develop custom communications processes to
                             integrate other operating systems with the BAS System.
                         32. OPERATOR: A person responsible for the safe and efficient operation of
                             the HVAC system through local controls and the BAS.
                         33. OUTPUT SIGNAL CONVERSION: Output signal conversion refers to the
                             changing of one kind of control output into a proportionally related signal
                             appropriate for direct actuation of the controlled device.         Signals are
                             converted by a transducer which may be external to the digital controller
                             originating the output. An example of output signal conversion in on/off or
                             open/close control is a contact closure originating in a digital controller
                             which activates a solenoid air valve which passes main air, thereby forcing
                             a damper to open fully.


Issued January 31,2009                                                                       25 00 00 5/27
TARRANT COUNTY COLLEGE DISTRICT DESIGN STANDARDS
DIVISION 25 – INTEGRATED AUTOMATION


                            34. OPERATOR-MACHINE INTERFACE: A method by which an operator
                                communicates with a BAS System. Operator-machine interfacing allows
                                an operator to command, monitor, and program the system.
                            35. PEER-TO-PEER: Peer-to-peer refers to controllers connected on a
                                communications LAN that act independently, as equals and communicate
                                with each other to pass information which facilitate control.
                            36. PERIPHERAL: Input/Output equipment used to communicate with the
                                computer and make copies of system outputs. Peripherals include display
                                monitor, printer, tape deck, diskette, etc.
                            37. PICK POINT (ALSO REFERRED TO POP-UP): A pick point is a graphical
                                display element that allows the operator to "click" the item and
                                automatically display the associated screen or service. Any screen may
                                have pick points to or be linked from any other screen. Pick points shall be
                                configured on each display screen to provide a logical user navigation
                                system using a ladder tree hierarchy and or an element on a graphic.
                            38. PID: PID refers to proportional, integral, and derivative control; the three
                                types of action used in controlling modulating equipment.
                            39. PROTOCOL: A set of rules that allow controllers and computers to connect
                                with each other that specifies format, timing, sequencing and error
                                checking for data transmission.
                            40. REDUNDANCY: A duplicate capacity that can be called upon when a
                                failure occurs so that the intended function continues to operate.
                            41. RESOLUTION: Refers to the number of possible states an input value or
                                output value can take and is a function of the digital controller I/O circuitry;
                                the A/D converter for input and the D/A converter for output. Ten bit
                                resolution has 1024 possible states and eight bit resolution has 256
                                possible states.
                            42. ROUTER: A software and hardware package that interconnects logical
                                sub-networks to form a large network and determines the best possible
                                route for data packets based on purpose, destination, and priority.
                            43. STAND ALONE CONTROL: Refers to the digital controller being able to
                                perform required climate control, and energy management functions
                                without connection to another digital controller or central site computer.
                                Digital controller requirements for stand alone control are a time clock, a
                                microprocessor, microchip resident control programs, PID control, a
                                communications port for interfacing with and programming the controller,
                                firmware for interrogation and programming, and I/O for sensing and
                                effecting control of its control environment.
                            44. VIRTUAL POINT: A point that only resides in software. A virtual point
                                allows transfer of calculated values between software programs, such as
                                enthalpy.
         25.01.6         BAS CONTRACTOR QUALIFICATIONS
                         A. The Contractor that will perform the work shall have at least ten (10) years
                            experience with the procurement, installation and testing of BAS. The
                            Contractor shall have completed at least five (5) BAS installations of the same
                            type and design specified, that have successfully operated the required
                            sequence of operation for at least two (2) years.
                         B.   The BAS Contractor shall employ specialists in the field of Facility Management
                              Control Systems including: Programming, Engineering, Field Supervision,
                              Installation, Functional Checkout, Control Loop Tuning, and Start-Up Testing.
                              Specialists shall have a minimum of five (5) years of experience with Facility
                              Management Systems.



Issued January 31,2009                                                                            25 00 00 6/27
TARRANT COUNTY COLLEGE DISTRICT DESIGN STANDARDS
DIVISION 25 – INTEGRATED AUTOMATION


         25.01.7         REQUIRED SUBMITTALS
                         A.   Contractor firm and project personnel qualifications.
                         B.   Manufacturers' specification sheets for each type of equipment to show
                              compliance with the project specification.
                         C.   Control system network architecture schematic.
                         D.   System configuration diagrams in simplified block format.
                         E.   Control loop and logic diagrams.
                         F.   Riser diagrams showing location of controllers, workstations, network routers,
                              and conduit routing.
                         G.   Conduit and cable schedules.
                         H.   BACnet Protocol Implementation Conformance Statements (PICS) for system
                              elements, including controllers, operator terminals, routers, repeaters, and
                              converters.
                         I.   Terminal point connection wiring diagrams including for each type of input
                              device and each type of output device, control relays, motor starters, electric or
                              electronic actuators, and temperature, pressure, flow, proof, and humidity
                              sensors and transmitters.
                         J.   Point-to-point wiring diagrams of each terminal strip, including digital controller
                              terminal strips, terminal strip location, termination numbers and the associated
                              point names.
                         K.   Panel fabrication and layout drawings showing physical dimensions, materials,
                              and construction of cabinets, panels, terminal blocks, electrical devices, bill of
                              materials, front, back, and section views.
                         L.   User interface functional outline including each display screen to be provided,
                              data to be displayed, and links to other screens.
                         M.   Field equipment data sheets that list the technical attributes of the device and
                              system process/service conditions.
                         N.   Lists of shop drawings, I/O points, nameplate engraving schedule, and
                              equipment components to be used.
                         O.   Field test reports:
                              1. Field sensor/transmitter calibration records.
                              2. Cable testing.
                              3. Site acceptance testing.
                         P.   Certificate of compliance stating the digital controllers meet all hardware and
                              software requirements.
                         Q.   Software licenses.
                         R.   As-built documents (drawings, product data sheets, manuals) shall be delivered
                              to the owner within two (2) weeks of project close out. All drawings shall be in
                              Legacy and Electronic (.dwg) format unless otherwise specified in writing by the
                              FB. Product data sheets and manuals shall be delivered in PDF format.
                         S.   Training Course Documentation: Training course documentation including a
                              manual for each trainee plus two (2) additional copies and two (2) copies of
                              audiovisual training aids, if used. Documentation to include an agenda, defined
                              objectives for each lesson and detailed description of the subject matter for
                              each lesson.




Issued January 31,2009                                                                             25 00 00 7/27
TARRANT COUNTY COLLEGE DISTRICT DESIGN STANDARDS
DIVISION 25 – INTEGRATED AUTOMATION


                         T.   Qualified service organization list which includes the names and telephone
                              numbers of organizations qualified to service the HVAC control systems.
                         U.   Certification that the installation of the control system is complete and the
                              technical requirements of the construction documents have been met.
                         V.   Operations and Maintenance Manual for equipment and software provided,
                              including:
                              1. Table of Contents.
                              2. General information of equipment and function.
                              3. Listing of supplier contact information.
                              4. Theory of equipment operation:
                                    a. Description of the BAS system, text and graphic chart sequence of
                                          operations, as-built drawings, field acceptance tests, component
                                          manufacturer’s owners manual, and operators manual.
                                    b. Documentation for complete set up of the digital controllers.
                                    c. Step by step procedures for uploading and downloading control
                                          programs to/from digital controllers and workstation computer or by
                                          directly connected computer.
                                    d. Complete documentation for the software setup, on a controller by
                                          controller basis, of every physical and virtual point.
                                    e. Step by step procedures for making set point and equipment
                                          scheduling changes through workstation software or by direct
                                          connection to a digital controller.
                                    f.    Documentation describing running and analyzing controller
                                          diagnostics.
                                    g. List alarms and messages programmed into the digital controllers as
                                          well as probable causes of all alarms.
                                    h. Include PID loop tuning procedures for the control system.
                              5. Software code listings, system back-up disks, and programming manuals.
                              6. Recommended spare parts list.
                              7. Warranties.
         25.01.8         GENERAL
                         A.   Provide a BAS with a distributed logic control system configuration that is based
                              on the ASHRAE BACnet protocol. System components shall be native BACnet
                              to the greatest extent practical.
         25.01.9         ACCEPTABLE MANUFACTURES
                         A.   Trane, Summit SQL Enterprise.
         25.01.10        NETWORK ARCHITECTURE
                         A.   TCCD and/or contractor in Div. 27 shall provide the high speed peer-to-peer
                              LAN operating at a minimum of 100 Mbps for interconnecting the workstation to
                              the network controllers.
                         B.   The Division 25 contractor shall coordinate with the Division 27 contractor, the
                              Project Manager, and the FB for networking support.
                         C.   The protocol used between systems shall be BACnet over Ethernet and comply
                              with the ASHRAE BACnet standard 135. Supported media shall include fiber,
                              10baseT, and 100baseT.
                         D.   Base the first tier network on a PC industry standard of Ethernet TCP/IP.




Issued January 31,2009                                                                           25 00 00 8/27
TARRANT COUNTY COLLEGE DISTRICT DESIGN STANDARDS
DIVISION 25 – INTEGRATED AUTOMATION


                         E.   Network multiple operator workstations, network controllers, system controllers,
                              and application-specific controllers for a completely inter-operable BAS. The first
                              tier network shall provide communications between operator workstations and
                              first tier DDC (Direct Digital Control) controllers.
                         F.   The first tier network shall be the facility-wide TCCD networks. TCCD shall
                              provide the appropriate VLAN programming in their switch/routers for the ports
                              utilized by the BAS.
                         G.   Second tier networks shall provide either "Peer-to-Peer," Master-Slave, or
                              Supervised Token Passing communications, operating at a minimum
                              communication speed of 9600 baud.
                         H.   The BAS shall include appropriate hardware equipment and software to allow
                              bi-directional data communications between the BAS and 3rd party
                              manufacturers’ control panels. A minimum of 100 third-party controllers shall be
                              supported on a single network. Integration shall be via EIA-232 or EIA-485
                              technologies.
                         I.   TCCD shall provide routers and bridges between central servers and
                              controllers. Routers shall support following BACnet communications:
                              1.  Interconnecting BACnet Ethernet and/or ARCNET high speed LAN to
                                  BACnet MS/TP LAN and Peer-to-Peer LANs.
                              2. BACnet messages may be routed to all LANs installed on the router at the
                                  same time without operator intervention.
                         J.   TCCD shall provide routers and switches to detect and repeat signals from one
                              LAN segment to other segments.
                         K.   Provide gateways for integrating third party systems using Modbus, Devicenet,
                              or DH+ protocols. OPC servers can also be used for diverse system integration.
                              Verify with FB. The OPC Server shall have the following characteristics and
                              functionality:
                              1.    Run on Windows Server 2003 machines connected via Ethernet to the
                                    BAS.
                              2. Allow generic components to be used and shared with other OPC-
                                    compliant clients and systems.
                              3. Serve as the "translation service" for the various languages used by the
                                    diverse systems with which it communicates.
                              4. Support multiple OPC clients running on both local and remote machines in
                                    the network.
                              5. Control the interaction and communication between workstation
                                    applications (on clients) and the BAS by providing standard methods for
                                    sharing and exchanging data between the BAS and other systems.
                              6. Provide interfaces for browsing, reading, and writing accessibility.
                         L.   Isolation shall be provided at all network terminations, as well as all field point
                              terminations, to suppress induced voltage transients consistent with IEEE
                              Standard 587.
         25.01.11        SYSTEM SOFTWARE
                         A.   Provide integrated multi-tasking software package for operator interface use to
                              control and monitor the BAS. Verify with FB.
                         B.   Provide system application software functions:
                              1.   Graphics:
                                   a. Add, delete, or change graphics on line.


Issued January 31,2009                                                                             25 00 00 9/27
TARRANT COUNTY COLLEGE DISTRICT DESIGN STANDARDS
DIVISION 25 – INTEGRATED AUTOMATION


                             b.   Library of standard HVAC equipment such as boilers, chillers, air
                                  handlers, terminals, fans, pumps, instruments, valves.
                             c. Dynamic (animated) and static displays.
                             d. Display background color to be light gray.
                             e. Display alphanumeric text and data.
                             f.   Equipment operating status.
                             g. Alarms.
                         2. System configuration.
                         3. System optimization.
                         4. Controller PID tuning.
                         5. System database.
                         6. System historian.
                         7. System clock synchronization.
                         8. System diagnostics.
                         9. Security:
                             a. Password access: Minimum of five (5) levels of customized access
                                  related to system operational control, monitoring, and programming
                                  functions.
                             b. Virus protection: Spam and Adware S/W by TCCD.
                         10. Alarm Management:
                             a. Configurable: Normal or bypassed.
                             b. Setpoint: adjustable limits.
                             c. Equipment status.
                             d. I/O point range validation.
                             e. Event log date, time, and operator actions.
                             f.   Alarm response audit trail.
                         11. Reports:
                             a. Energy usage.
                             b. Equipment runtimes.
                             c. Equipment status.
                             d. Alarm summary.
                         12. Trend logs:
                             a. Real time and historical data.
                             b. Up to eight (8) parameters on same trend.
                             c. Adjustable time and magnitude scales.
                         13. Schedules:
                             a. Start/stops.
                             b. Time of day.
                             c. Temperature optimization.
                             d. Demand Limiting.
                             e. Day/night setback.
                             f.  Weekly, monthly, holiday by system.
                             g. Temporary overrides.




Issued January 31,2009                                                                 25 00 00 10/27
TARRANT COUNTY COLLEGE DISTRICT DESIGN STANDARDS
DIVISION 25 – INTEGRATED AUTOMATION


         25.01.12        SYSTEM PERFORMANCE
                         A.   Provide controllers that execute PID control loops at a frequency of ten (10)
                              seconds. The process variable scan and updated calculated output rate is at
                              same rate.
                         B.   Custom and standard application execution times must be consistent with or
                              faster than mechanical processes under control.
                         C.   Graphics update rates:
                              1. Display Refresh: 20 dynamic points in ten (10) seconds.
                              2. Object Command: two (2) seconds.
                              3. Object Scan: two (2) seconds.
                              4. Alarm Response Time: thirty (30) seconds when point goes into alarm.
                              5. Multiple alarms: three (3) seconds of each other.
                         D.   Input Sensor accuracy:
                              1.  Temperature:
                                  a. Space – 1°F
                                  b. Duct Air – 1°F
                                  c. Outside Air – 2°F
                                  d. Water – 1°F
                                  e. Delta-T – 0.25°F
                              2. Relative Humidity – 5%
                              3. Dew point – 3°F
                              4. Carbon Dioxide – 5%
                              5. Flow:
                                   a. Fluid – 2%
                                   b. Air – 5%
                              6. Pressure:
                                  a. Duct – 0.1” WG
                                  b. Space – 0.1” WG
                                  c. Fluid – .5%
                              7. Level:
                                  a. Cooling Tower Basin – 1 inch
                                  b. Tanks – 0.5 inch
                              8. Electrical:
                                  a. Amps – 5%
                                  b. Volts – 5%
                                  c. Watts – 5%
                                  d. Power Factor – 5%
                         E.   Control Loop Stability:
                              1.   Air Pressure – 0.2” WG
                              2.   Airflow – 100cfm
                              3.   Temperature – 1F
                              4.   Humidity – 5% RH
                              5.   Fluid Pressure – 1.5 psi
                              6.   Fluid Flow – 2%



Issued January 31,2009                                                                        25 00 00 11/27
TARRANT COUNTY COLLEGE DISTRICT DESIGN STANDARDS
DIVISION 25 – INTEGRATED AUTOMATION


                         F.   Level – 1 inch.
         25.01.13        SYSTEM DIAGNOSTICS/FAILURE MODE
                         A.   Provide the BAS with system diagnostic programs to include:
                              1. Initiation Checks.
                              2. On-Line Diagnostics.
                              3. Off-Line Diagnostics.
                         B.   Provide diagnostic programs with alarms to alert the operator upon detection of
                              a fault.
                         C.   Provide BAS software to re-initialize system upon fault restoration.
                         D.   Provide BAS software so that the system will fail in a predictable manner to
                              ensure integrity and safety of system equipment and operation.
         25.01.14        OPERATOR INTERFACE
                         A.   TCCD will provide desk/console for operator workstations for central control
                              room.
                         B.   TCCD will provide operator workstation. Design Professional to specify
                              equipment (hardware and/or software) as needed; workstation components
                              include:
                              1. Dual 19 inch flat panel monitors.
                              2. Laser color printer.
                              3. Dual network interface card.
                              4. Sound card.
                              5. Mouse.
                              6. Keyboard.
                         C.   TCCD will provide a portable operator terminal for command entry, information
                              management, network alarm management, database management, system
                              diagnostics, interrogate and re-program any point in the system from any DDC
                              panel.
         25.01.15        WEB BROWSER
                         A.   Web browser access is through the TCCD campus LAN, which is protected by a
                              firewall. Verify with FB.
                         B.   Provide a Thin Client web browser function, with intuitive mouse/menu driven
                              interface, to view process data via local or wide area networks.
                         C.   Provide JAVA objects such as:
                              1.   Point record value.
                              2.   Point summary information.
                              3.   Trending Logs.
                              4.   Process Diagrams.
                              5.   Schedules.
                              6.   Reports.
                         D.   Provide security and access control through a login page that requires a user
                              login and password.
                         E.   System data monitoring and control function access dependent upon assigned
                              role privileges and area of responsibility.




Issued January 31,2009                                                                               25 00 00 12/27
TARRANT COUNTY COLLEGE DISTRICT DESIGN STANDARDS
DIVISION 25 – INTEGRATED AUTOMATION


         25.01.16        CONTROLLERS
                         A.   Real-time control functions, including scheduling, history collection and
                              alarming, shall be resident in the BAS controllers to facilitate greater fault
                              tolerance and reliability.
                         B.   Provide microprocessor based network controller:
                              1.  Word size of 16 bits.
                              2.  Scan rate 10 second (maximum).
                              3.  Memory as needed for its self function and lower tier controllers.
                              4.  Real time clock.
                              5.  Communications:
                                     a. Open system port.
                                     b. Two (2) EIA-232.
                         C.   Each Network Controller shall store trend and point history data for all analog
                              and digital inputs and outputs.
                         D.   Network Controllers shall be fully user-programmable supervisory controller.
                         E.   The Network Controller shall monitor the network of distributed application-
                              specific controllers, provide global strategy and direction, and communicate on a
                              peer-to-peer basis with other Network Controllers.
                         F.   All controllers shall be listed by Underwriters Laboratories (UL).
                         G.   Application Specific Controllers.
                              1.   Operates as standalone controller for equipment such as:
                                   a. Boiler.
                                   b. Chiller.
                                   c. Cooling Towers.
                              2. I/O points (Refer to Appendix B).
                              3. Local display:
                                   a. Point data.
                                   b. Audible and visual alarm indication.
                                   c. Password protected.
                         H.   Unitary Controllers.
                              1.   Operates as standalone controller for equipment such as:
                                   a. Unit vents.
                                   b. Heat pumps.
                                   c. Packaged rooftop units.
                                   d. Fan coils.
         25.01.17        ENERGY METERING
                         A.   Cooling and Heating System BTU Monitoring: Verify with FB.
                              1.   Provide BTU energy calculations for chilled water and hot water
                                   installations at the central plant and at building entrances in the BAS
                                   software, utilizing data from field sensors:
                                   a. Flow sensor on return line.
                                   b. Matched pair of RTD temperature sensors on supply and return lines.
                              2.   BAS functions:



Issued January 31,2009                                                                             25 00 00 13/27
TARRANT COUNTY COLLEGE DISTRICT DESIGN STANDARDS
DIVISION 25 – INTEGRATED AUTOMATION


                                   a.   Record high and low peak demand readings and store for retrieval at
                                        any time: daily, month to date, and year to date peak chilled water
                                        usage/flow readings.
                                   b. Record chilled and hot water usage/flow readings and store for
                                        retrieval at any time: daily, month to date, and year to date building
                                        chilled water usage/flow readings.
                         B.   Sanitary and Domestic water meters for campus, buildings, and systems make-
                              up may be required. Verify with FB:
                              1.   Local display:
                                   a. Volumetric rate.
                                   b. Totalizer.
                              2. Output:
                                   a. Data: 4-20mA for flow rate to BAS.
                                   b. Alarm: Relay contact output.
                              3. Monitored by the BAS, functions include:
                                   a. High and low peak demand readings.
                                   b. Store daily, month to date, and year to date peak readings.
                                   c. Meter failure alarm to indicate a loss of meter reading.
                         C.   Electrical power meters: May be required. Verify with FB.
                              1. Local Display:
                                   a. Amperage.
                                   b. Voltage (per phase and phase-to-phase).
                                   c. KW.
                                   d. Power Factor.
                              2. Output:
                                   a. Data: Ethernet or Modbus data link to BAS.
                                   b. Alarm: Relay contact output.
                              3. Monitored by BAS, functions include:
                                   a. Display data.
                                   b. Record high and low peak readings and store for retrieval at any time:
                                         daily, month to date, and year to date peak readings.
                                   c. Control sequence to limit KW demand. When electric power meter
                                         exceeds a predetermined threshold, the controls system shall de-
                                         energize low priority equipment (as defined by TCCD) and adjust
                                         equipment set points to avoid peak demand charges. As the building’s
                                         power demand decreases, system components will be staged back
                                         into normal service.
                                   d. Meter failure alarm to indicate a loss of meter reading.
                         D.   Natural Gas Meters: Verify with FB.
                              1.   Local display:
                                   a. Volumetric rate.
                                   b. Totalizer.
                              2.   Output:
                                   a. Data: 4-20mA for flow rate to BAS.
                                   b. Alarm: Relay contact output.
                              3.   Monitored by the BAS, functions include:



Issued January 31,2009                                                                          25 00 00 14/27
TARRANT COUNTY COLLEGE DISTRICT DESIGN STANDARDS
DIVISION 25 – INTEGRATED AUTOMATION


                                   a.   High and low peak demand readings.
                                   b.   Store daily, month to date, and year to date peak readings.
                                   c.   Meter failure alarm to indicate a loss of meter reading.
         25.01.18        FIELD INPUT DEVICES
                         A.   Field sensors measurement methodology (type of sensor) dependent upon
                              system service conditions and application. Typical applications are included
                              below.
                         B.   Provide sensors of the same type from the same manufacturer.
                         C.   Provide remote sensing electronics for transmitters with local indication if
                              needed to mount at a location accessible by plant operators as close as
                              possible to the sensing point. Output signal to be 4-20mA unless otherwise
                              specified.
                         D.   Provide local process gauges with dial sizes between 3 to 5 inches in diameter,
                              unless location is further away than three (3) feet from aisle way, in which 6 to 8
                              inch or larger gauges will be required. Gauge scales shall be selected so that
                              the expected normal operating value is approximately 2/3 of full range.
                         E.   Provide switch contacts shall be rated for 120 vac at 5 amperes.
                         F.   Provide field calibration of sensors:
                              1. Calibrate instruments to verify accuracy and linearity in accordance with
                                 standard industry practices or manufacturer's recommendations.
                              2. Test equipment shall have an accuracy two (2) times or better than
                                 equipment being tested and traceable to NIST.
                              3. Calibration and installation records shall be prepared and maintained with
                                 the following information:
                                 a. Tag number.
                                 b. Date component received.
                                 c. Purchase order number.
                                 d. Serial number.
                                 e. Calibration data, minimum of three (3) points.
                                 f.    Date of calibration.
                                 g. Person performing calibration.
                                 h. Date component installed.
                                 i.    Test Equipment: Manufacturer, model number, serial number,
                                       calibration date, calibration lab, and accuracy.
                         G.   TEMPERATURE:
                              1.   Provide two (2) wire platinum resistance type (10,000 ohm RTD) sensors or
                                   electronic semiconductor thermistor (beadcoated with glass, covered in
                                   metal sheath, encapsulated with moisture proof epoxy) probe temperature
                                   sensors as required to meet accuracy and service conditions.
                              2.   Provide 0.250 diameter RTDs with alpha = 0.00385 ohms/ohm/deg, spring
                                   loaded, and installed in 0.260 bore thermowells for liquid service (direct
                                   immersion for air service).
                              3.   Provide matched pair of sensors where differential temperature
                                   measurements are made.
                              4.   Provide sensor material compatible with environment and service
                                   conditions.




Issued January 31,2009                                                                             25 00 00 15/27
TARRANT COUNTY COLLEGE DISTRICT DESIGN STANDARDS
DIVISION 25 – INTEGRATED AUTOMATION


                              5.  ROOM SENSOR:
                                  a. Thermistor or RTD.
                                  b. Wall mounted.
                              6. DUCT SENSOR:
                                  a. RTD.
                                  b. Single point or averaging.
                                  c. Rigid with minimum five (5) feet of length.
                              7. OUTSIDE AIR:
                                  a. RTD.
                                  b. Sun shield.
                              8. DELTA TEMPERATURE:
                                  a. Matched pair of RTDs.
                              9. THERMOSTATS:
                                  a. Programmable with digital display.
                                  b. Low voltage, 24v, bi-metal operated, mercury switch.
                              10. Setpoint adjustment and indication.
                              11. IMMERSION:
                                  a. Sensor: RTD.
                                  b. Transmitter: 4-20mA.
                              12. GAGE: Bimetallic helix actuated.
                              13. THERMOWELL: sized for ½ the pipe diameter or six (6) inches which ever
                                   is less.
                         H.   ANALYTICAL INSTRUMENTS:
                              1.     HUMIDISTATS:
                                     a. Wall mounted.
                                     b. Transmitter with integral power supply.
                                     c. Tamper proof housing.
                              2.     CONDUCTIVITY:
                                     a. Platinum electrode.
                                     b. Automatic temperature compensation.
                              3.     pH/ORP:
                                     a. Glass electrode.
                                     b. Automatic temperature compensation.
                         I.    FREEZSTATS: provided for freeze protection of all air-handling unit coils using
                               outside air. The freezestat set point shall be determined as a function of outdoor
                               air temperature, amount of outdoor air being introduced to the air-handling unit,
                               return air temperature, and amount of return air to the unit.
                         J.   CARBON DIOXIDE SENSOR: based on Non-dispersive infrared (NDIR)
                              operating principle. Sensor shall have a local display, analog output, and relay
                              output contacts.
                         K.   OCCUPANCY ROOM SENSOR: based on passive infrared operating principle
                              through a segmented Fresnel lens. Sensor shall have a programmable delayed
                              off, adjustable coverage range, and manual override mode.
                         L.    PRESSURE:




Issued January 31,2009                                                                             25 00 00 16/27
TARRANT COUNTY COLLEGE DISTRICT DESIGN STANDARDS
DIVISION 25 – INTEGRATED AUTOMATION


                              1. Provide standard connections for all pressure instruments shall be ½ inch
                                 NPT unless otherwise specified.
                              2. Provide diaphragm seals with capillary tubes for remote transmitter service
                                 mounting.
                              3. Provide liquid fill for gages on lines with vibrations and snubbers for
                                 pulsation protection.
                              4. TRANSDUCER/TRANSMITTER:
                                 a. Service: Absolute, gage, differential.
                                 b. Type: Electronic capacitance or piezioresistive.
                              5. GAUGE:
                                 a. Type: Bourdon tube.
                                 b. Dial: four (4) inch, white background with black markings and pointer.
                                 c. Window: Safety Glass.
                                 d. Overload protection.
                              6. SWITCH:
                                 a. Type: Diaphragm.
                                 b. Deadband: Adjustable.
                         M.   FLOW:
                              1. Provide flow elements in horizontal pipe runs in accordance with good
                                 metering practices and in accordance to manufacturer’s requirements for
                                 upstream and downstream pipe diameters. Coordinate installation
                                 requirements with manufacturer.
                              2. TRANSMITTER:
                                 a. Air: Averaging Pitot.
                                 b. Fluid: Electromagnetic, Turbine
                              3. SWITCH:
                                 a. Air: Differential Pressure.
                                 b. Fluid: Paddle or Thermal Dispersion.
                         N.   LEVEL:
                              1. TRANSMITTER:
                                 a. Non-Contacting: ultrasonic.
                                 b. Contacting: magnetorestrictive, micropulse, differential pressure.
                              2. SWITCH: Float or capacitance.
                         O.   CURRRENT:
                              1. TRANSMITTERS: Battery powered combination split core, transformer
                                 type with built-in rectifier, zero/span adjustment, and two (2) wire output.
                                 Transmitter shall meet or exceed ANSI/ISA S50.1 requirements and be
                                 UL/CSA recognized.
                              2. SWITCHES: Battery powered, solid state with adjustable trip. Provided for
                                 equipment status feedback.
                         P.   VOLTAGE:
                              1. TRANSMITTERS: UL listed AC voltage self powered single loop, two (2)
                                 wire type, with zero/span adjust and 4-20mA output. Transmitters to meet
                                 or exceed ANSI/ISA S50.1 requirements.
                              2. TRANSFORMERS: UL listed rated for 600vac, with enclosed windings,
                                 and built-in fuse protection.




Issued January 31,2009                                                                         25 00 00 17/27
TARRANT COUNTY COLLEGE DISTRICT DESIGN STANDARDS
DIVISION 25 – INTEGRATED AUTOMATION


         25.01.19        CONTROL PANELS
                         A.   Provide NEMA rated indoor control cabinets/panels, according to location
                              service hazards.
                         B.   Provide panels as wall or floor mounted (on legs or house keeping pad).
         25.01.20        AUTOMATED VALVES
                         A.   Control valve body and trim materials shall be selected in accordance with
                              manufacturer’s recommendations for design conditions and service as shown in
                              construction documents.
                         B.   Valves shall have stainless steel stems. Valve leakage rating shall be 0.01% of
                              rated Cv.
                         C.   Two-way valves shall have equal percentage flow characteristics.
                         D.   Three-way valves shall have linear flow characteristics.
                         E.   Valves three (3) inches and smaller shall be globe valves or characterized ball
                              valves. Valves four (4) inches and greater shall be butterfly valves.
                         F.   Valve sizing will be based on the following guidelines:
                              1.   Two position service: line size valve.
                              2.   Two-way modulating service: Belimo or Flow Control Industries Delta P
                                   pressure independent characterized control valve (PICCV) model with
                                   ports or FB approved equal.
                              3.   Three-way modulating service: select pressure drop equal to the smaller of
                                   twice the pressure drop through the coil (load) or five (5) psi.
                         G.   Water valves shall fail normally open or closed as follows unless otherwise
                              specified:
                              1.   Water zone valves: normally open.
                              2.   Heating coils in air handlers: normally open.
                              3.   Chilled water control valves: normally closed.
                              4.   Other applications: as scheduled or as required by sequences of operation.
                         H.   Refer to Division 23 for air handling unit control valves.
         25.01.21        ACTUATORS
                         A.   Valve and damper control actuators shall be electronic.
                         B.   Valve and damper actuators shall be provided with stall protection to prevent
                              actuator damage throughout the actuator’s rotation.
                         C.   Valve actuators shall be provided with position feedback as follows:
                              1. OPEN/CLOSE: limit switches (full open and full close), contact closures.
                              2. MODULATING: 0-100% feedback, 4-20 mA signal.
                         D.   Actuators used for power-failure or safety applications shall be equipped with an
                              internal spring return mechanism or an uninterruptible power supply (UPS).
                         E.   Proportional actuators shall accept a 0-10 vdc or a 0-20 mA control signal and
                              have a 2-10 vdc or 4-20 mA operating range.
                         F.   Electronic valve actuators shall provide the following minimum close-off
                              pressure ratings:
                              1.   TWO-WAY: 150% of total system (pump) head.




Issued January 31,2009                                                                           25 00 00 18/27
TARRANT COUNTY COLLEGE DISTRICT DESIGN STANDARDS
DIVISION 25 – INTEGRATED AUTOMATION


                              2.    THREE-WAY: 300% of pressure differential between ports A and B at
                                    design flow or 100% of total system (pump) head.
                         G.   Actuators shall feature the ability for Operators to manually position each
                              actuator when actuator is not powered. Non-spring return actuators shall feature
                              an external manual gear release. Spring return actuators with more than 60 in.-
                              lb torque capacity shall feature a manual crank.
         25.01.22        MOTORIZED CONTROL DAMPERS
                         A.   Motorized control dampers shall have linear flow characteristics and be of
                              parallel- or opposed-blade type as specified below or as scheduled on drawings:
                              1.  Outdoor and return air mixing dampers and face-and-bypass dampers:
                                  Parallel-blade, direct airstreams toward each other.
                              2. Other modulating dampers: Opposed-blade.
                              3. Two-position shutoff dampers: Parallel- or opposed-blade with blade and
                                  side seals.
                         B.   Dampers frames shall be 13 gauge galvanized steel channel or 1/8” extruded
                              aluminum with reinforced corner bracing.
                         C.   Damper blades shall not exceed 8” in width or 48” in length. Blades shall be
                              minimum 16 gauge and suitable for medium velocity (2000 fpm) performance.
                         D.   Damper shaft bearings shall be oil impregnated sintered bronze or better.
                         E.   Blade seals shall leak no more than 10 cfm per square foot at 4 inches water
                              gauge differential pressure.
                         F.   Motorized control damper sections shall not exceed 48 to 60 inches. Each
                              section to have at least one (1) damper actuator.
                         G.   Motorized control dampers shall have exposed linkages.
         25.01.23        CONTROL DEVICES
                         A.   Time Delay Relays shall be solid-state plug-in type, UL listed, and with
                              adjustable time delay. Delay adjustable ±100% from set point shown in
                              construction documents. Contact rating, configuration, and coil voltage to be
                              suitable for application. Provide NEMA 1 enclosure for relays not installed in
                              local control panel.
                         B.   Control Relays shall be plug-in type, UL listed, with dust cover and LED
                              "energized" indicator. Contact rating, configuration, and coil voltage shall be
                              suitable for application.
                         C.   Fume hood face velocity control systems shall include a velocity sensor, face
                              velocity controller, damper, and damper actuator. The system shall monitor,
                              display, and control the fume hood face velocity at all times regardless of the
                              sash position.
                         D.   Provide manual override controls at the MCC (if visible from equipment location,
                              otherwise provide local operator station near equipment) with an hand-off-auto
                              (HOA) switch with:
                              1.   Status input to BAS.
                              2.   Visual status indicator when output is ON or in Hand position.
         25.01.24        POWER SUPPLIES
                         A.   The BAS shall be powered from an electrical distribution panel that is backed by
                              the facility’s UPS.




Issued January 31,2009                                                                              25 00 00 19/27
TARRANT COUNTY COLLEGE DISTRICT DESIGN STANDARDS
DIVISION 25 – INTEGRATED AUTOMATION


                         B.   DC power supply output shall match output current and voltage requirements.
                              Unit shall be full-wave rectifier type with output ripple of 5.0 mV maximum peak-
                              to-peak. Regulation shall be 1.0% line and load combined, with 100-
                              microsecond response time for 50% load changes. Unit shall have built-in over-
                              voltage and over-current protection and shall be able to withstand 150% current
                              overload for at least three (3) seconds without trip-out or failure. Unit shall
                              operate between 32°F and 120°F. EMI/RFI shall meet FCC Class B and
                              MILSTD 810C for shock and vibration. Line voltage units shall be UL recognized
                              and CSA listed.
                         C.   Internal or external transient voltage and surge suppression shall be provided
                              for workstations and controllers. Surge protection to include:
                              1.   Dielectric strength of 1000 V minimum.
                              2.   Response time of 10 nanoseconds or less.
                              3.   Transverse mode noise attenuation of 65 dB or greater.
                              4.   Common mode noise attenuation of 150 dB or greater at 40-100.
         25.01.25        CABLE/WIRING
                         A.   INSTRUMENT CABLE:
                              1.  300 V shielded multi-conductor cables shall be suitable for operation in
                                  instrument circuits carrying low level digital and analog signals.
                              2. Sunlight resistant and suitable for installation in wet or dry locations,
                                  whether in tray, conduit or underground duct, both indoors and outdoors.
                              3. CONDUCTOR: No. 18 AWG annealed copper with Class B stranding;
                                  tinned copper or alloy-coated as required to be compatible with material in
                                  contact with them.
                              4. INSULATION: Either ethylene propylene rubber (EPR) or cross-linked
                                  polyethylene (XLPE) rated for 300 V and continuous operation at a 90 C
                                  conductor temperature with a minimum thickness of 20 mils. Insulation
                                  shall be free stripping from the conductor material.
                              5. Each pair or triad shall consist of individually insulated conductors twisted
                                  together with a drain wire and covered with a shield and jacket. Drain wire
                                  to be 20 AWG, Class B stranded tinned copper wire in accordance with
                                  ASTM B 33. Maximum lay of twist to be three (3) inches.
                              6. Multi-paired/triad cables shall consist of bunched pairs or triads, with an
                                  overall drain wire, shield and jacket.
                              7. Filler material shall be non-hygroscopic and flame retardant.
                              8. A 20 mil jacket shall be applied over each individual pair/triad shield of a
                                  multi-pair/triad group.
                              9. Shielding shall consist of a minimum 2 mil thick laminated, non-burning
                                  aluminum Mylar tape applied helically with the aluminum side in continuous
                                  contact with the drain wire. A minimum 15 % overlap is required in the
                                  shield tape lay to ensure 100 % coverage.
                              10. Jacket material shall be flame resistant, self extinguishing, heavy-duty,
                                  Bright Yellow, thermosetting chlorosulphonated polyethylene (Hypalon)
                                  which is oil, heat, moisture, weathering, abrasion and chemical resistant.
                              11. Materials containing asbestos are not approved.
                              12. Color coding to be as follows:
                                  a. PAIRS: One (1) conductor Black and one (1) White.
                                  b. TRIADS: One (1) conductor Black, one (1) White and one (1) Red.




Issued January 31,2009                                                                           25 00 00 20/27
TARRANT COUNTY COLLEGE DISTRICT DESIGN STANDARDS
DIVISION 25 – INTEGRATED AUTOMATION


                              13. Individual conductors shall pass the VW-1 vertical wire flame test of UL 44.
                                  Completed cables shall pass the vertical tray flame propagation test in
                                  accordance with IEEE 383 utilizing heat from a 70,000 BTU per hour
                                  burner.
                         B.   600V CONTROL CABLE:
                              1.    The multi-conductor cable shall be rated for operation in 125 volt DC, 240
                                    volt AC or 120 volt AC, 60 hertz, control and signaling circuits. Cables
                                    shall also be rated for potential and current transformer circuits.
                              2.    The cable shall be sunlight resistant and suitable for installation in wet or
                                    dry locations, whether in tray, conduit or underground duct, both indoors
                                    and outdoors.
                              3.    Cable materials, construction and testing shall meet or exceed the
                                    requirements of ICEA S-95-658.
                              4.    Conductor material shall be No. 14, 12 or 10 AWG annealed copper with
                                    Class B stranding. The conductors shall be tinned copper or alloy-coated
                                    as required to be compatible with material in contact with them.
                              5.    Insulation material shall be either ethylene propylene rubber (EPR) or
                                    cross-linked polyethylene (XLPE) rated for 600 V and continuous operation
                                    at a 90 C conductor temperature, 130 C emergency overload
                                    temperature and 250 C under short circuit conditions.
                              6.    Insulation shall be free stripping from the conductor material and have a
                                    minimum thickness of 30 mils.
                              7.    Jacket material shall be flame resistant, self extinguishing, heavy-duty,
                                    black, thermosetting chlorosulphonated polyethylene (Hypalon) which is oil,
                                    heat, moisture, weathering, abrasion and chemical resistant.
                              8.    Materials containing asbestos are not approved.
                              9.    Cables shall consist of individually insulated conductors, bunched and filled
                                    to be round in cross section. All fillers and binder tape to be non-
                                    hygroscopic and flame retardant. Binder tape shall have a minimum 15 %
                                    overlap.
                              10.   Acceptable alternate jacket materials are polychloroprene (Neoprene) and
                                    chlorinated polyethylene (CPE).
                              11.   Conductor color-coding shall be in accordance with ICEA S-95-658 Method
                                    2 K-2. White or Green conductors shall not be provided.
                              12.   Individual conductors shall pass the VW-1 vertical wire flame test of UL 44.
                                    Completed cables shall meet or exceed the requirements of UL 1277 and
                                    pass the vertical tray flame propagation test in accordance with utilizing
                                    heat from a 70,000 BTU per hour burner.
                              13.   The cable shall be surface printed or embossed on the overall jacket at
                                    regular intervals with, as a minimum, manufacturer’s name, voltage rating,
                                    size and number of conductors, insulation and jacket type, temperature
                                    rating and sunlight resistance.
                         C.   TELECOMMUNICATIONS CABLE:
                              1.    Refer to Division 27.
                              2.    Provide BLU Category 5e patch cords of appropriate length to connect to
                                    data jacks near BAS device, refer to Division 27.
                         D.   FIBER OPTIC CABLE:
                              1.    Refer to Division 27.
                         E.   TERMINATIONS AND CONNECTORS:



Issued January 31,2009                                                                             25 00 00 21/27
TARRANT COUNTY COLLEGE DISTRICT DESIGN STANDARDS
DIVISION 25 – INTEGRATED AUTOMATION


                              1.   Provide high conductivity ring or spade lugs as required for copper
                                   conductor termination at terminal blocks.
                              2.   Provide RJ-45 connectors for data and RJ-11 connectors for voice UTP
                                   cables in accordance with TIA/EIA-568.
                              3.   Provide type ST connectors in accordance with TIA/EIA-568:
                                   a. Insertion Loss (IL): 0.5dB max.\
                                   b. Return Loss: 45dB typical.
                                   c. Repeatability of IL: 0.1dB.
                                   d. Body: Stainless Steel.
                                   e. Ferrule: Zirconia Ceramic.
                                   f.   Service Life: 1000 mated/demate cycles.
                                 g. Operating Temp: Minus 40 to plus 85C.
                         F.   RACEWAYS (CONDUIT OR TRAY):
                              1.   Refer to Division 26.
                              2.   Provide raceways for instrument and control cable/wiring where subject to
                                   mechanical damage and at levels below ten (10) feet in mechanical,
                                   electrical, or service rooms.
                              3.   Provide raceways sized and wire size and type selected in accordance with
                                   manufacturer's recommendations and NEC requirements.
                              4.   Provide rigid raceways with supports, reamed at both ends, and left clean
                                   and free of obstructions. Raceway sections shall be joined with couplings
                                   and according to code.
                              5.   Flexible metal raceways and liquid-tight flexible metal raceways shall not
                                   exceed three (3) feet in length and shall be supported at each end. Liquid-
                                   tight flexible metal raceways shall be used in areas exposed to moisture
                                   including chiller and boiler rooms.
         25.01.26        INSTRUMENT TUBING
                         A.   Process instrument tubing shall be hard temper seamless copper conforming to
                              ASTM B-88.
                         B.   Provide 1/2-inch tubing for process input to pressure or flow transmitters, flow
                              indicators, flow or pressure switches, pressure gauges, and analyzer sample
                              lines.
                         C.   Provide Swagelok fittings for tubing.
         25.01.27        IDENTIFICATION
                         A.   Provide engraved equipment labels/tags for control panels, field instruments,
                              and control valves that meet human factors guidelines. Lettering shall be all
                              caps.
                              1.   PANEL LIGHTS:
                                   a. TYPE: 2-Ply Lamacoid.\
                                   b. SIZE: per application.
                                   c. COLOR: coordinate with the FB.
                                   d. MOUNTING: double sided exterior rated tape for inside panel; screws
                                      for panel doors.
                              2.   FIELD INSTRUMENTS/CONTROL VALVES:
                                   a. TYPE: Stainless steel.



Issued January 31,2009                                                                          25 00 00 22/27
TARRANT COUNTY COLLEGE DISTRICT DESIGN STANDARDS
DIVISION 25 – INTEGRATED AUTOMATION


                                   b. SIZE: per application.
                                   c. SHAPE: Rectangular, with corners rounded.
                                   d. MOUNTING: Attach with stainless steel wire.
                         B.   Provide label content for instruments and valves using Division 23 approved
                              abbreviation lists as:
                              1.   Campus - Building – Floor – Room No. - System Service – Component
                                   Type – Loop Identifier (Numeric Identifier/Alpha Identifier).
                              2. (Example: NDPP –1201C – CHW – PT – 100B).
                         C.   Provide label content for panels using complete words for panel main
                              identification label and using FB approved abbreviation list for components
                              mounted on or in panel:
                              1.   Main panel label:
                                   a. CHILLER NO. 0100.
                                   b. CONTROL PANEL.
                              2.   Component label:
                                   a. CH-PWRSUP-0100.
         25.01.28        INSTALLATION PRACTICES
                         A.   Install field instrumentation and control equipment in accordance to standard
                              industry practices and manufacturer’s recommendations.
                         B.   Provide details for typical and special equipment installations on construction
                              documents.
                         C.   Provide materials that are new and compatible with the process conditions
                              exposed to for the installed service.
                         D.   Install field instruments in such a manner and at such a height as to allow
                              convenient access for readings, calibration and maintenance.
                         E.   Install instruments in steam, liquid and liquid sealed service below their process
                              connection point. Slope connections down to the instrument with a slope of one
                              (1) inch per foot.
                         F.   Install instruments in gas and non-condensable vapor service above their
                              process connection point. Slope connections up to the instrument with a slope
                              of one (1) inch per foot.
                         G.   Support instruments and tubing to relieve strain on connections and to prevent
                              excess vibration or movement.
                         H.   Install piping and tubing in a neat appearance, protected from being stepped on,
                              and include provisions for expansion, drainage and without interference to
                              access to valves or other equipment. Tubing bends are to be made with a tool;
                              hand bends are not acceptable.
         25.01.29        START-UP TESTING/COMMISSIONING
                         A.   Refer to Division 24 for commissioning requirements.
                         B.   Perform continuity checks for each instrument loop prior to energizing.
                         C.   Perform instrument loop checks to verify that each loop component is properly
                              calibrated and that overall system operation and sequence is correct.
                         D.   Repair or replace any instrument or loop component found to be defective or out
                              of calibration and repeat installation and test process.
                         E.   Provide documentation of calibration, installation, and repair records.


Issued January 31,2009                                                                             25 00 00 23/27
TARRANT COUNTY COLLEGE DISTRICT DESIGN STANDARDS
DIVISION 25 – INTEGRATED AUTOMATION




         25.01.30        TRAINING
                         A.   Controls system training shall be provided to TCCD staff by controls contractor
                              and controls system manufacturer. Training shall be provided via self-paced
                              training, web-based or computer-based training, classroom training, or a
                              combination of training methods as determined by TCCD per project.
                              Instructors shall be factory-trained and experienced in presenting this material.
                              Classroom training shall be accomplished using a network of working controllers
                              representative of installed hardware.
                         B.   Training shall enable students to accomplish the following objectives:
                              1.  Proficiently operate the system.
                              2.  Understand control system architecture and configuration.
                              3.  Understand DDC system components.
                              4.  Understand system operation, including DDC system control and
                                  optimizing routines (algorithms).
                              5. Operate workstation and peripherals.
                              6. Log on and off system.
                              7. Access graphics, point reports, and logs.
                              8. Adjust and change system set points, time schedules, and holiday
                                  schedules.
                              9. Recognize common HVAC system malfunctions by observing system
                                  graphics, trend graphs, and other system tools.
                              10. Understand system drawings and Operation and Maintenance manual.
                              11. Understand job layout and location of control components.
                              12. Access data from DDC controllers.
                              13. Operate portable operator's terminals.
                              14. Create and change system graphics.
                              15. Create, delete, and modify alarms, including configuring alarm reactions.
                              16. Create, delete, and modify point trend logs (graphs) and multi-point trend
                                  graphs.
                              17. Configure and run reports.
                              18. Add, remove, and modify system's physical points.
                              19. Create, modify, and delete application programming.
                              20. Add operator interface stations.
                              21. Add a new controller to system.
                              22. Download firmware and advanced applications programming to a
                                  controller.
                              23. Configure and calibrate I/O points.
                              24. Maintain software and prepare backups.
                              25. Interface with job-specific, third-party operator software.
                              26. Add new users and understand password security procedures.
                         C.   Presentations of objectives shall be divided into three (3) sessions (1-13, 14-23,
                              and 24-26). Participants will attend one (1) or more of sessions, depending on
                              knowledge level required.
                              1. Day-to-day Operators (objectives 1-13).
                              2. Advanced Operators (objectives 1-13 and 14-23).




Issued January 31,2009                                                                            25 00 00 24/27
TARRANT COUNTY COLLEGE DISTRICT DESIGN STANDARDS
DIVISION 25 – INTEGRATED AUTOMATION


                              3.   System Managers and Administrators (objectives 1-13 and 24-26).
                              4.   System Administrator (objectives 1-26).

25.06    SCHEDULES FOR INTEGRATED AUTOMATION

         See TCCD Design Standard 25 06 00 200809 – Schedule of Typical Input/Output Points.

25.90    INTEGRATED AUTOMATION CONTROL SEQUENCES

         25.90.1         Equipment sequence of operations shall be shown within the mechanical drawings or
                         specifications for each system/component, including, air-handling unit, fan, pump,
                         chiller, boiler, air compressor, heat exchanger, terminal heating and cooling unit.
                         A.   Major equipment and pumps will be operated on an equalization of runtime
                              basis.
                         B.   The various systems will be monitored and remotely controlled by the BAS.
         25.90.2         CHILLED WATER SYSTEMS
                         A.   The chilled water system is designed as a primary/secondary loop configuration
                              comprised of multiple chillers.
                         B.   The chillers have local control panels that are connected to a common network
                              panel. The network panel communicates to the BAS via data communications
                              link to provide information on monitored variables.
                         C.   Chiller and pump run times shall be equalized.
                         D.   Chillers can be started by the plant operator at the:
                              1. BAS operator workstation.
                              2. Network control panel.
                              3. Individual chiller local panel.
                         E.   Secondary pumps vary speed to maintain a set differential pressure based on
                              end of line sensors.
                         F.   Secondary pumps are staged on or off based on differential pressure.
                         G.   Primary water pumps are staged with each chiller under the control of the local
                              controller.
                         H.   Chillers are staged on or off based on secondary loop supply temperature.
                         I.   Chillers are also staged by a Chiller Optimization program to utilize the most
                              efficient chillers dependent upon load and auxiliary systems.
         25.90.3         COOLING TOWERS AND CONDENSER WATER SYSTEMS
                         A.   The BAS shall provide control programming to minimize energy usage taking
                              into account the characteristics of the cooling tower, cooling tower fans,
                              condenser water pumps, and chillers to minimize on energy consumption while
                              operating major system components within safe parameters. This will also
                              control the cooling tower bypass valves.
                         B.   Makeup water controlled by the basin level sensor.
                         C.   Condenser water pumps are staged with each chiller under the control of the
                              local controller.
                         D.   Cooling towers are activated based on number of chillers running and load
                              demand.




Issued January 31,2009                                                                          25 00 00 25/27
TARRANT COUNTY COLLEGE DISTRICT DESIGN STANDARDS
DIVISION 25 – INTEGRATED AUTOMATION


         25.90.4         HOT WATER SYSTEMS
                         A.   The hot water system contains multiple boilers with constant volume primary
                              pumps, and associated controls.
                         B.   Boilers are staged based on campus load per header supply temperature.
                         C.   Boilers are controlled by an energy efficiency optimization program in the BAS.
                         D.   Boilers are controlled and monitored by their local control panels. Combustion
                              safety controls will shutdown the boiler automatically for the following conditions:
                              1.   Flame failure.
                              2.   Failure to establish a pilot flame.
                              3.   Failure to establish a main flame.
                              4.   Low water cutoff.
                              5.   High temperature cutoff.
         25.90.5         VARIABLE VOLUME AIR HANDLING UNITS
                         A.   The air handling units contain chilled water coils, hot water coils, supply fan,
                              filter, dampers and associated controls.
         25.90.6         MODES OF OPERATION
                         A.   OCCUPIED: System operates under a defined schedule, supply fan on and
                              under duct temperature control.
                         B.   UNOCCUPIED: System operates under a defined schedule to maintain
                              minimum and maximum temperatures.
                         C.   ECONOMIZER: System operates under defined parameters to use outside air
                              instead of chilled water for cooling.
         25.90.7         FAN COIL UNIT
                         A.   The fan coil units contain a supply fan, cooling and heating coils, and associated
                              controls.
         25.90.8         MODES OF OPERATION
                         A.   OCCUPIED: System operates based on space temperature.
                         B.   UNOCCUPIED: System operates based on minimum and maximum space
                              temperature setpoints and includes a night setback program.
         25.90.9         LIGHTING
                         A.   EXTERIOR LIGHTING: Exterior Lighting shall be controlled by the BAS. There
                              shall be a north facing photocell on each campus that is monitored by the BAS
                              through an analog input. Appropriate BAS digital outputs will control lighting
                              contactors each interfaced by a hand-on-automatic (HOA) switch. The HOA
                              switch H position will be monitored by a BAS digital input to indicate if the HOA
                              switch has been left in the H or over-ride position. There are typically three
                              types of controlled circuits on a campus:
                              1.   MINIMUM OR ALL NIGHT CIRCUIT: This circuit comes on at dusk with a
                                   predetermined minimum foot candle level of light and goes off at dawn with
                                   a predetermined maximum foot candle level of light. This type of circuit
                                   normally supplies about 25% of the total lighting in areas of the campus.
                              2.   OCCUPIED OR NORMAL LIGHT LEVEL CIRCUIT: This circuit comes on
                                   at dusk as described above but is turned off (unoccupied mode) by the
                                   BAS at a predetermined time. This type of circuit normally provides about
                                   75% of the total nighttime total lighting in areas of the campus.


Issued January 31,2009                                                                              25 00 00 26/27
TARRANT COUNTY COLLEGE DISTRICT DESIGN STANDARDS
DIVISION 25 – INTEGRATED AUTOMATION


                              3.   DECOATIVE OR SPECIAL LIGHTING CIRCUIT: This circuit would
                                   normally be turned on at dusk as described above and turned off by the
                                   BAS when deemed appropriate. Verify with FB.
                         B.   INTERIOR LIGHTING: Interior Lighting will normally be controlled by occupancy
                              sensors in classrooms, conference rooms, etc. Some larger rooms or spaces
                              may not be suitable for occupancy sensors. These rooms will be controlled in an
                              override mode by the BAS to ensure that the space lighting is not left on while
                              the space is unoccupied. Verify with FB.
         25.90.10        ELECTRICAL DISTRIBUTION
                         A.   TBD.




                                               END OF DIVISION




Issued January 31,2009                                                                         25 00 00 27/27

								
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