AUTOMATIC TEMPERATURE CONTROLS - 11.23.2015.pdf.pdf

1.1 AUTOMATIC TEMPERATURE CONTROLS (DIRECT DIGITAL CONTROL)

A. General

1. Provide complete direct digital (DDC) system of automatic temperature control system by the following manufacturers, or approved equal:

a. Johnson Controls

b. Siemens

c. Honeywell

d. Automated Logic

2. The new DDC system must be 100% compatible and capable of seamless communication with the existing fill in DDC systems.

3. All systems shall be provided directly by the manufacturers listed above. The manufacturer must provide full support throughout the guarantee period.

4. Provide the services of control manufacturer’s representative to be on site during the entire time that the startup testing and balancing procedures, detailed in Part 3 of this specification, takes place. Representative shall be part of manufacturer’s service organization and shall be skilled in the adjustment and calibration of all control devices as well as being capable of modifying and checking system software.

5. Certify maintenance of local office within 50 mile radius of job site, staffed with factory trained engineers capable of providing instructions to User Agency’s personnel, and performing routine and emergency maintenance on ALL system components. Upon

Designer’s request, submit list of personnel staffing field office and their professional disciplines.

6. Provide DDC system supplier's warranty of performance of entire system as required by

Contract documents. Performance and components requirements are established by control sequences and diagrams on Drawings and by this Paragraph.

7. DDC components shall be capable of proportional-integral-derivative (PID) control.

8. DDC system shall perform all sequences of operation which may be listed on control drawings or attached to this specification. Controls supplier shall provide all devices necessary to completely perform sequences whether such devices are explicitly shown on the drawings specified, or not shown or specified.

B. Submittals

1. This Paragraph supplements provisions of Submittals Paragraph of this Section.

2. Materials and equipment for which Shop Drawing and Product Data submittal are required shall include but shall not be limited to:

a. Each control system.

b. Control components including:

1) temperature, humidity, current and static pressure sensors,

2) direct digital field control panels,

3) automatic control valves,

4) automatic control smoke and stair pressurization dampers and operators,

5) electric wiring,

6) transducers, and

7) solenoids and other electrical components.

c. I/O devices (including LED monitor, line printer, modems and necessary interface devices).

d. Software.

e. Point list.

f. Detailed network diagram showing Direct Digital Control Field Panel (DDCFPs) and communication links.

3. Submit the following for approval:

a. Control drawings with detailed piping and wiring diagrams, including bills of materials and written description of operation, for each system.

b. Panel faceplate layouts showing gauges, lights, indicators and switches with instrument ranges and nameplate inspections for local and central panels.

c. Valve and damper schedules showing sizes, configurations, capacities, pressure drops and locations of equipment.

d. Data sheets for control system components.

e. Complete software information including names of software packages provided, control sequences performed including flow chart logic diagrams, complete information on user programmability (commands, language details, programming sequences, etc.), and complete description of operating system.

f. Calculations for valve coefficients (CVs).

g. Floor plans showing locations of equipment and control conduits.

h. Detailed drawings of LED monitor with keyboard and printer.

4. Provide initial design and as built construction drawings to User Agency’s operating personnel.

5. Provide narrative descriptions of sequences of operation. Descriptions shall not merely duplicate specified sequences of operations.

C. Provide services of control supplier's field engineer to supervise work specified in other

Paragraphs of this Section:

1. Installation of automatic valves and separable wells furnished under this Paragraph.

2. Provision of necessary valved pressure taps, water drain and overflow connections and piping.

3. Provision of auxiliary contacts on magnetic starters with buttons and switches in required configurations.

4. Installation of automatic dampers.

5. Provision of blank off plates (safing) required to install dampers smaller than duct size.

6. Assembly of multiple section dampers with interconnecting linkages and extension of shafts through duct for external mounting of damper motors.

7. Provision of sheet metal baffle plates to eliminate stratification and provide air volumes specified. Locate by experimentation; affix permanently when stratification is eliminated.

8. Provision of access doors or other approved means of access through ducts for service to control equipment.

D. Guarantee control system free from defects in material and workmanship and guarantee performance of systems as required by Contract Documents for one year of normal use and service beginning on date DCAMM begins to receive beneficial use of system.

E. Programmed Maintenance, Startup and Software Update

1. Submit manufacturer's agreement to provide necessary programmed maintenance and to maintain systems for one year from date of Final Acceptance, within Contract sum.

2. Programmed maintenance agreement shall identify maintenance work to be performed and shall quote cost of work for two years subsequent to guarantee period.

3. Start system and perform necessary testing and debugging. Perform commissioning in presence of DCAMM’s Project Manager and Designer. Provide 15 days’ notice before acceptance test. Notice shall certify that system is complete and operates as required by

Contract Documents. When system performance is deemed satisfactory, system parts will be accepted for beneficial use warranty shall begin. Note additional requirements in Part

III of this specification.

4. Update software free of charge during warranty as manufacturer's software is improved.

5. Provide 40 hours of on site instruction in operating DDC system. Furnish three copies of operating manuals for complete system.

6. Computer to support color graphics software package shall have the following requirements:

a. Current model Intel processor, capacity and speed suitable for system and meeting the recommendation of the software manufacturer.

b. 101 key “qwerty” keyboard with numeric keypad.

c. LED flat screen monitor, capable of displaying at a resolution of 1028 x 760 minimum, 20 inches minimum.

d. Mouse with minimum of two buttons and scroll wheel.

e. Current operating system with Microsoft Office Suite 2013 or later, Professional

Edition.

f. CD-ROM reader and writer.

g. Internal modem suitable for system and connection.

h. Laserjet color printer (Hewlett-Packard, Epson, or approved equal).

F. Operator Interface

1. Basic Interface Description:

a. Command Entry/Menu Selection Process: Operator Workstation interface software shall minimize operator training through the use of English language prompting, English language point identification, and industry standard PC application software.

1) The operator interface shall minimize the use of a typewriter style keyboard through the use of a mouse or similar pointing device, and "point and click" approach to menu selection. For example, users shall be able to start and stop equipment or change setpoints from graphical displays through the use of a mouse or similar pointing device.

b. Graphical and Text-Based Displays: At the option of the user, Operator

Workstations shall provide consistent graphical and text-based displays of all system point and application data described in this specification. Point identification, engineering units, status indication, and application naming conventions shall be the same at all operator devices.

c. Multiple, Concurrent Displays: The Operator Interface shall provide the ability to simultaneously view several different types of system displays in a windowing environment to speed facility operation and analysis. For example, the interface shall provide the ability to simultaneously display a graphic depicting an air handling unit, while displaying the trend graph of several associated space temperatures to allow the user to analyze system performance. If the interface is unable to display several different types of displays at the same time, the FMS contractor shall provide at least two operator stations.

d. Password Protection: Multiple-level password access protection shall be provided to allow the user/manager to limit workstation control, display and data base manipulation capabilities as he deems appropriate for each user, based upon an assigned password.

1) Passwords shall be exactly the same for all operator devices, including DDC panel portable or panel mounted network terminals. Any additions or changes made to password definition shall automatically cause passwords at all DDC panels on a network to be updated and downloaded to minimize the task of maintaining system security. Users shall not be required to update passwords for DDC panels individually.

2) A minimum of five levels of access shall be supported:

3) A minimum of 50 passwords shall be supported at each DDC panel.

4) Operators will be able to perform only those commands available for their respective passwords. Menu selections displayed at any operator device, including portable or panel mounted devices, shall be limited to only those items defined for the access level of the password used to log-on.

5) User-definable, automatic log-off timers of from I to 60 minutes shall be provided to prevent operators from inadvertently leaving devices on-line.

e. Operator Commands: The operator interface shall allow the operator to perform commands including, but not limited to, the following:

1) Start-up or shutdown selected equipment

2) Adjust setpoints

3) Add/Modify/Delete time programming

4) Enable/Disable process execution

5) Lock/Unlock alarm reporting for each point

6) Enable/Disable Totalization for each point

7) Enable/Disable Trending for each point

8) Override PID Loop setpoints

9) Enter temporary override schedules

10) Define Holiday Schedules

11) Change time/date

12) Enter/Modify analog alarm limits

13) Enter/Modify analog warning limits

14) View limits

15) Enable/Disable Demand Limiting for each meter

16) Enable/Disable Duty Cycle for each load

f. Logs and Summaries: Reports shall be generated automatically or manually, and directed to either LED displays, printers, or disk files. As a minimum, the system shall allow the user to easily obtain the following types of reports:

1) A general listing of all points in the network

2) List all points currently in alarm

3) List of all off-line points

4) List all points currently in override status

5) List of all disabled points

6) List all points currently locked out

7) List of all items defined in a "Follow-Up" file

8) List all Weekly Schedules

9) List all Holiday Programming

10) List of Limits and Deadbands

11) Summaries shall be provided for specific points, for a logical point group, for a user-selected group of groups, or for the entire facility without restriction due to the hardware configuration of the facility management system. Under no conditions shall the operator need to specify the address of hardware controller to obtain system information.

g. Notification Interface Software: The Operator Workstation shall be capable of transmitting alarms via email and text message. The message sent shall include the critical alarm text and optionally a description of what action to take. The scheduling feature shall allow time of controls for all connected email addresses or phone numbers, and up to four enable/disable periods a day for each account. The application shall be password protected and capable of supporting 1500 accounts.

2. Third Party Software Interaction:

a. Third Party Interface System data, including transactions, alarms, totalization files, etc., shall be stored on the workstation disk drive in an industry standard database format (e.g., dbase IV) such that it is compatible with off the shelf third party database and spreadsheet programs.

b. Live FMS Data Exchange

1) The Facility Management System shall interface to off-the-shelf personal computer software programs (e.g., Microsoft Word for Windows, Microsoft

Excel, Lotus, etc.) This interface shall conform to Microsoft Corporation's

Dynamic Data Exchange (DDE) protocols and standards. The user shall have the ability to "link" the computer programs directly to live, real-time Facility

Management System data values. Systems that offer data exchange using only historical, disk resident information will not be acceptable. FMS data value

"reads" and "writes" shall both be permissible.

3. Dynamic Color Graphic Displays: 1. Color graphic floor plan displays, and 2. system schematics (for each piece of mechanical equipment; including air handling units, chilled water systems, hot water systems, condenser water systems, heat pumps, VAV boxes, unit ventilators, fin tube radiators, and all other end devices) shall be provided as a part of this contract.

a. A System Selection/Penetration: The operator interface shall allow users to access the various system schematics and floor plans via a graphical penetration scheme, menu selection, or text-based commands.

b. Dynamic Data Displays: Dynamic temperature values, humidity values, flow values, and status indication shall be shown in their actual respective locations, and shall automatically update to represent current conditions without operator intervention.

c. Windowing: The windowing environment of the PC Operator Workstation shall allow the user to simultaneously view several graphics at the same time to analyze total building operation, or to allow the display of a graphic associated with an alarm to be viewed without interrupting work in progress.

d. Graphics Definition Package: Graphic generation software shall be provided to allow the user to add, modify, or delete system graphic displays.

1) The FMS contractor shall provide libraries of pre-engineered screens and symbols depicting standard air handling unit components (e.g. fans, cooling coils, filters, dampers, etc.), complete mechanical systems (e.g. constant volume-terminal reheat, VAV, etc.) and electrical symbols.

2) The graphic development package shall use a mouse or similar pointing device in conjunction with a drawing program to allow the user to perform the following:

3) (Define symbols

4) (Position and size symbols

5) (Define background screens

6) (Define connecting lines and curves

7) (Locate, orient and size descriptive text

8) (Define and display colors for all elements

9) (Establish correlation between symbols or text and associated system points or other displays.

4. System Configuration and Definition: All temperature and equipment control strategies and energy management routines shall be definable by the operator. System definition and modification procedures shall not interfere with normal system operation and control.

a. The system shall be provided complete with all equipment and documentation necessary to allow an operator to independently perform the following functions:

1) Add/Delete/Modify Standalone DDC Panels

2) Add/Delete/Modify Operator Workstations

3) Add/Delete/Modify Application Specific Controllers

4) Add/Delete/Modify points of any type, and all associated point parameters, and tuning constants.

5) Add/Delete/Modify alarm reporting definition for each point.

6) Add/Delete/Modify control loops

7) Add/Delete/Modify energy management applications

8) Add/Delete/Modify time-(and calendar-) based programming.

9) Add/Delete/Modify Totalization for every point

10) Add/Delete/Modify Historical Data Trending for every point

11) Add/Delete/Modify custom control processes

12) Add/Delete/Modify any and all graphic displays, symbols, and cross-references to point data

13) Add/Delete/Modify dial-up telecommunication definition

14) Add/Delete/Modify all operator passwords

15) Add/Delete/Modify Alarm Messages

b. Programming Description: Definition of operator device characteristics, DDC panels, individual points, applications and control sequences shall be performed through fill-in-the-blank templates and graphical programming approach.

1) Graphical programming shall allow the user to define the software configuration of DDC control logic for HVAC system control sequences, fan interlocks, pump interlocks, PID control loops, and other control relationships through the creation of graphical logic flow diagrams.

2) Graphical Programming: Control sequences are created by using a mouse input device to draw interconnecting lines between symbols depicting inputs, operators (comparisons and mathematical calculations), and outputs of a control sequence. As a minimum, graphic symbols shall be used to represent:

3) Process Inputs, such as temperature, humidity, or pressure values, status, time, date, or any other measured or calculated system data.

4) Mathematical Process Operators, such as addition, subtraction, multiplication, or greater than, equal to, less than, etc.

5) Logical Process Operators such as AND, OR, Exclusive OR, NOT, etc.

6) Time Delays

7) Process Control Outputs such start/stop control points, analog adjust points, etc.

8) Process Calculation Outputs

9) Text file Outputs and Advisories

10) Network-Wide Strategy Development: Inputs and outputs for any process shall not be restricted to a single DDC panel, but shall be able to include data from any and all other DDC panels to allow the development of network-wide control strategies. Processes shall also allow the operator to use the results of one process as the input to any number of other processes (cascading).

11) Sequence Testing and Simulation: A software tool shall be provided, which allows a user to simulate control sequence execution and test strategies before they are actually applied to mechanical systems. Users shall be able to enter hypothetical input data, and verify desired control response and calculation results via graphical displays and hardcopy printouts.

c. System Definition/Control Sequence Documentation: All portions of system definition shall be self-documenting to provide hardcopy printouts of all configuration and application data. Control process and DDC control loop documentation shall be provided in logical, graphical flow diagram format to allow control sequences to be easily interpreted and modified at any time in the future.

d. Database Save/Restore/Back-Up: Back-up copies of all standalone DDC panel databases shall be stored in at least one Operator Workstation.

1) Continuous supervision of the integrity of all DDC panel data bases shall be provided. In the event that any DDC panel on the network experiences a loss of its data base for any reason, the system shall automatically download a new copy of the respective data base to restore proper operation. Data base back-up/Download shall occur over the local area network without operator intervention. Users shall also have the ability to manually execute downloads of any or all portions of a DDC panels data base.

e. Air Handlers

1) Supply fan status/selection.

2) Return fan status.

3) Discharge air setpoint/selection.

4) Mixed air temperature

5) Outdoor air temperature.

6) Smoke detector - normal/alarm

7) Freezestat - normal/alarm

8) Static pressure high limit - normal/alarm

9) Static pressure low limit - normal/alarm

10) Filter differential pressure - normal/alarm

11) Supply cfm.

12) Return cfm.

13) Space temperature sensor setpoint/selection

14) Warm up sensor setpoint/selection

15) Space relative humidity sensor setpoint/selection

16) Return air relative humidity sensor setpoint/selection.

17) High limit humidistat - normal/alarm.

18) Time based schedule start/stop time selection.

f. Condenser Water System

1) Boiler status/alarms

2) Cooling tower status/alarms

3) Condenser water pumps status

4) Condenser water common alarm - normal/alarm

5) Primary condenser water supply temperature setpoint/selection

6) Primary condenser water return temperature

7) Secondary condenser water supply temperature setpoint/selection

8) Secondary condenser water return temperature

9) Primary condenser water flow in gpm

10) Secondary condenser water flow in gpm

11) Time based schedule start/stop time selection.

g. Chilled Water System

1) Chillers status selection

2) Chilled water pumps status

3) Condenser water pumps status

4) Chilled common alarm - normal/alarm

5) Primary chilled water supply temperature setpoint/selection

6) Primary chilled water return temperature

7) Secondary chilled water supply temperature setpoint/selection

8) Secondary chilled water return temperature

9) Primary chilled water flow in gpm

10) Secondary chilled water flow in gpm

11) Time based schedule start/stop time selection.

h. Hot Water System

1) Hot water supply temperature setpoint selection

2) Hot water return temperature

3) Outdoor temperature

4) Hot water pump status selection.

i. Heat Pumps

1) Status/alarm

2) Valve position

3) Space temperature

G. Integration with Third-party Manufacturer's Equipment

1. General

a. The Facility Management System (FMS) shall be capable of interoperating with multiple building systems supplied by different manufacturers. The FMS shall be able to receive, react to, and in some cases, return information from multiple building systems.

1) Point inputs and outputs from the third-party controllers shall have real-time interoperability with FMS software features such as: Control Software, Energy

Management, Custom Process Programming, Alarm Management, Historical

Data and Trend Analysis, Totalization, and Dial-Up and Local Area Network

Communications, as mentioned earlier in the specification.

2. Networking/Communications:

a. The FMS shall support any combination of third-party controllers (if more than one third-party manufacturer is being integrated) on a single network.

b. A minimum of 100 third-party controllers shall be supported on a single network.

c. Integration shall be by RS-232 or RS-485 technologies.

3. Diagnostics/Verification:

a. The installer/operator shall have the ability to verify, and diagnose communication messages and point information between third-party controllers and the Facility

Management System.

4. Point Inputs and Outputs:

a. The FMS shall be able to monitor and control the following third-party controller point inputs and outputs.

H. DDC System Architecture

1. The specified DDC system shall consist of an information sharing network of stand-alone direct digital control panels to monitor and control the specified mechanical equipment per the control sequence and input/output summary. Information sharing network shall be defined as the ability of each Direct Digital Control Field Panel (DDCFP) to exchange information on the network with other DDCFP without the need of a front end devices such as a central computer, gateways or any other network managing device. The stand-alone capability shall be defined as the ability of each DDC panel to independently monitor and control connected mechanical equipment through its own internal microprocessor.

2. The DDCFP network shall operate on a true token pass, peer to peer communication basis.

The internal microprocessors which reside within each DDCFP shall provide for full exchange of system information between each DDCFP on the network communication trunk. Systems which rely on a central processor or similar device to exchange system information shall not be acceptable. Failure of any one of the network DDCFP panels shall not affect the operation of other DDC panels residing on the same network. All

DDC panel/point failures shall be annunciated at specified printers or terminals.

3. It is recognized that some systems may use stand-alone terminal unit controllers on the network, between the DDCFP and the equipment to be controlled. Such controllers may control an individual VAV box, heat pump or fan coil. It is not the intent of this specification that terminal unit controllers communicate directly with each other without going through the DDCFP.

4. Network transmission shall occur at minimum rate of 9600 band. This includes transmission on data bus from DDCFP to DDCFP and from DDCFP to host computer.

Full communications shall be sustained as long as there are at least two operational

DDCFPS on any segment of the bus. All transmission shall incorporate data integrity and validity check routings by virtue of either Manchester encoding, double transmission or parity bit techniques. The DDC system shall clearly state the DDC submittal that data integrity and validity routines are incorporated in the system and the technique used and incorporated.

I. Direct Digital Control Field Panels (DDCFP)

1. General: Standalone DDC panels shall be microprocessor based, multi-tasking, multi-user, real-time digital control processors. Each standalone DDC panel shall consist of modular hardware with plug-in enclosed processors, communication controllers, power supplies, and input/output modules. A sufficient number of controllers shall be supplied to fully meet the requirements of this specification and the attached point list.

2. Memory: Each DDC panel shall have sufficient memory (minimum 4 megabytes) to support its own operating system and databases including:

a. Control processes

b. Energy Management Applications

c. Alarm Management

d. Historical/Trend Data for all points

e. Maintenance Support Applications

f. Custom Processes

g. Operator I/O

h. Dial-Up Communications

i. Manual Override Monitoring

3. Point types: Each DDC panel shall support the following types of point inputs and outputs:

a. Digital Inputs for status/alarm contacts

b. Digital Outputs for on/off equipment control

c. Analog Inputs for temperature, pressure, humidity, flow, and position measurements

d. Analog Outputs for valve and damper position control, and capacity control of primary equipment

e. Pulse Inputs for pulsed contact monitoring

4. Expandability: The system shall be modular in nature, and shall permit easy expansion through the addition of software applications, workstation hardware, field controllers, sensors, and actuators.

5. Serial Communication Ports: Standalone DDC panels shall provide at least two RS-232C serial data communication ports for simultaneous operation of multiple operator I/O devices such as industry standard printers, laptop workstations, PC workstations, and panel mounted or portable DDC panel Operator's Terminals. Standalone DDC panels shall allow temporary use of portable devices without interrupting the normal operation of permanently connected modems, printers, or network terminals.

6. Hardware Override Switches: As indicated in the point schedule, the operator shall have the ability to manually override automatic or centrally executed commands at the DDC panel via local, point discrete, onboard hand/off/auto operator override switches for binary control points and gradual switches for analog control type points. These override switches shall be operable whether the panel is powered or not.

7. Hardware Override Monitoring: DDC panels shall monitor the status or position of all overrides, and include this information in logs and summaries to inform the operator that automatic control has been inhibited. DDC panels shall also collect override activity information for daily and monthly reports.

8. Local Status Indicator Lamps: The DDC panel shall provide local status indication for each binary input and output for constant, up-to-date verification of all point conditions without the need for an operator I/O device.

9. Integrated On-Line Diagnostics: Each DDC panel shall continuously perform self-diagnostics, communication diagnosis and diagnosis of subsidiary equipment. The DDC panel shall provide both local and remote annunciation of any detected component failures, or repeated failure to establish communication. Indication of the diagnostic results shall be provided at each DDC panel, and shall not require the connection of an operator I/O device.

10. Surge and Transient Protection: 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.

11. Powerfail Restart: In the event of the loss of normal power, there shall be an orderly shutdown of all standalone DDC panels to prevent the loss of database or operating system software. Non-Volatile memory shall be incorporated for all critical controller configuration data, and battery back-up shall be provided to support the real-time clock and all volatile memory for a minimum of 72 hours.

a. Upon restoration of normal power, the DDC panel shall automatically resume full operation without manual intervention.

b. Should DDC panel memory be lost for any reason, the panel will automatically receive a download via the local area network, phone lines, or connected computer.

In addition, the user shall have the capability of reloading the DDC panel via the local area network, via the local RS-232C port, or via telephone line dial-in.

J. System Software Features

1. General

a. All necessary software to form a complete operating system as described in this specification shall be provided.

b. The software programs specified in this section shall be provided as an integral part of the DDC panel and shall not be dependent upon any higher level computer for execution.

2. Control Software Description:

a. Pre-Tested Control Algorithms: The DDC panels shall have the ability to perform the following pre-tested control algorithms:

1) Two Position Control

2) Proportional Control

3) Proportional plus Integral Control

4) Proportional, Integral, plus Derivative Control

5) Automatic Control Loop Tuning

b. Equipment Cycling Protection: Control software shall include a provision for limiting the number of times each piece of equipment may be cycled within any one-hour period.

c. Heavy Equipment Delays: The system shall provide protection against excessive demand situations during start-up periods by automatically introducing time delays between successive start commands to heavy electrical loads.

d. Powerfail Motor Restart: Upon the resumption of normal power, the DDC panel shall analyze the status of all controlled equipment, compare it with normal occupancy scheduling, and turn equipment on or off as necessary to resume normal operation.

3. Energy Management Applications:

a. DDC Panels shall have the ability to perform any or all of the following energy management routines:

1) Time of Day Scheduling

2) Calendar Based Scheduling

3) Holiday Scheduling

4) Temporary Schedule Overrides

5) Optimal Start

6) Optimal Stop

7) Night Setback Control

8) Enthalpy Switch Over (Economizer)

9) Peak Demand Limiting

10) Temperature Compensated Load Rolling

11) Fan Speed/CFM Control

12) Heating/Cooling Interlock

13) Hot Water Reset

14) Chilled Water Reset

15) Condenser Water Reset

16) Chiller Sequencing

b. All programs shall be executed automatically without the need for operator intervention, and shall be flexible enough to allow operator customization.

Programs shall be applied to building equipment as described in the Execution portion of this specification.

4. Custom Process Programming Capability: DDC panels shall be able to execute custom, job-specific processes defined by the operator, to automatically perform calculations and special control routines.

a. Process inputs and Variables: It shall be possible to use any of the following in a custom process:

1) Any system-measured point data or status

2) Any calculated data

3) Any results from other processes

4) User-Defined Constants

5) Arithmetic functions square root, exponential, etc.)

6) Boolean logic operators (and, or, exclusive or, etc.)

7) On-delay/Off-delay/One-shot timers

b. Process Triggers: Custom processes may be triggered based on any combination of the following:

1) Time interval

2) Time of day

3) Date

4) Other processes

5) Time programming

6) Events (e.g., point alarms)

c. Dynamic Data Access: A single process shall be able to incorporate measured or calculated data from any and all other DDC panels on the local area network.

1) In addition, a single process shall be able to issue commands to points in any and all other DDC panels on the local area network.

d. Advisory/Message Generation: Processes shall be able to generate operator messages and advisories to operator 1/0 devices. A process shall be able to directly send a message to a specified device, buffer the information in a follow-up file, or cause the execution of a dial-up connection to a remote device such as a printer.

e. Custom Process Documentation: The custom control programming feature shall be self-documenting. All interrelationships defined by this feature shall be documented via graphical flowcharts and English language descriptors.

5. Alarm Management: Alarm management shall be provided to monitor, buffer, and direct alarm reports to operator devices and memory files. Each DDC panel shall perform distributed, independent alarm analysis and filtering to minimize operator interruptions due to non-critical alarms, minimize network traffic, and prevent alarms from being lost.

At no time shall the DDC panel's ability to report alarms be affected by either operator activity at a PC Workstation or local I/O device, or communications with other panels on the network.

a. Point Change Report Description: All alarm or point change reports shall include the point's English language description, and the time and date of occurrence.

b. Prioritization: The user shall be able to define the specific system reaction for each point. Alarms shall be prioritized to minimize nuisance reporting and to speed operator response to critical alarms. A minimum of three priority levels shall be provided. Each DDC panel shall automatically inhibit the reporting of selected alarms during system shutdown and start-up. Users shall have the ability to manually inhibit alarm reporting for each point.

1) The user shall also be able to define under which conditions point changes need to be acknowledged by an operator, and/or sent to follow-up files for retrieval and analysis at a later date.

c. Report Routing: Alarm reports, messages, and files will be directed to a user-defined list of operator devices or PC disk files used for archiving alarm information.

Alarms shall also be automatically directed to a default device in the event a primary device is found to be off-line.

d. Alarm Messages: In addition to the point's descriptor and the time and date, the user shall be able to print, display or store a 65-character alarm-n message to more fully describe the alarm condition or direct operator response.

1) Each standalone DDC panel shall be capable of storing a library of at least 250

Alarm Messages. Each message may be assignable to any number of points in the panel.

e. Auto-Dial Alarm Management: In Dial-up applications, only critical alarms shall initiate a call to a remote operator device. In all other cases, call activity shall be minimized by time-stamping and saving reports until an operator scheduled time, a manual request, or until the buffer space is full. The alarm buffer must store a minimum of 50 alarms.

f. Transaction Logging: Operator commands and system events shall be automatically logged to disk in Personal Computer industry standard database format. Operator commands initiated from Direct connected workstations, dial-up workstations, and local DDC panel Network Terminal devices shall all be logged to this transaction file. This data shall be available at the Operator Workstation. A utility shall be provided to allow the user to search the transaction file using standard database query techniques, including searching by dates, operator name, data point name, etc.

In addition, this transaction file shall be accessible with standard third party database and spreadsheet packages.

6. Historical Data and Trend Analysis: A variety of Historical data collection utilities shall be provided to automatically sample, store, and display system data in all of the following ways:

a. Continuous Point Histories: Standalone DDC panels shall store Point History Files for all analog and binary inputs and outputs.

1) The Point History routine shall continuously and automatically sample the value of all analog inputs at half hour intervals. Samples for all points shall be stored for the past 24 hours to allow the user to immediately analyze equipment performance and all problem-related events for the past day. Point

History Files for binary input or output points and analog output points shall include a continuous record of the last ten status changes or commands for each point.

b. Control Loop Performance Trends: Standalone DDC panels shall also provide high resolution sampling capability in one-second increments for verification of control loop performance.

c. Extended Sample Period Trends: Measured and calculated analog and binary data shall also be assignable to user-definable trends for the purpose of collecting operator-specified performance data over extended periods of time. Sample intervals of 1 minute to 2 hours shall be provided. Each standalone DDC panel shall have a dedicated buffer for trend data, and shall be capable of storing a minimum of

5000 data samples.

d. Data Storage and Archiving: Trend data shall be stored at the Standalone DDC panels, and uploaded to hard disk storage when archival is desired. Uploads shall occur based upon either user-defined interval, manual command, or when the trend buffers become full. All trend data shall be available in disk file format compatible with Third Party personal computer applications.

7. Runtime Totalization: Standalone DDC panels shall automatically accumulate and store runtime hours for binary input and output points as specified in the Execution portion of this specification.

a. The Totalization routine shall have a sampling resolution of one minute or less.

b. The user shall have the ability to define a warning limit for Runtime Totalization.

Unique, user-specified messages shall be generated when the limit is reached.

8. Analog/Pulse Totalization: Standalone DDC panels shall automatically sample, calculate and store consumption totals on a daily, weekly, or monthly basis for user-selected analog and binary pulse input-type points.

a. Totalization shall provide calculation and storage of accumulations of up to 99,999.9 units (e.g. KWH, gallons, KBTU, tons. etc.).

b. The Totalization routine shall have a sampling resolution of one minute or less.

c. The user shall have the ability to define a warning limit. Unique, user-specified messages shall be generated when the limit is reached.

9. Event Totalization: Standalone DDC panels shall have the ability to count events such as the number of times a pump or fan system is cycled on and off. Event totalization shall be performed on a daily, weekly, or monthly basis.

a. The Event Totalization feature shall be able to store the records associated with a minimum of 9,999,999 events before reset.

b. The user shall have the ability to define a warning limit. Unique, user-specified messages shall be generated when the limit is reached.

10. Provide at least DDCFPs to serve the project (to serve the following systems.)

1) No. of DDCFPs System

K. Portable Operator’s Terminals

1. Each DDC panel shall be capable of supporting an operator's terminal for local command entry, instantaneous and historical data display, and program additions and modifications.

Provide portable operator’s terminals.

a. There shall be a provision for both permanently mounting the standalone DDC panel

Operator Terminal, or using it as a portable hand-held unit.

b. The DDC panel Operator Terminal shall simultaneously display a minimum of 6 points with full English identification to allow an operator to view single screen dynamic displays depicting entire mechanical systems.

c. The operator functions provided by the DDC panel Operator Terminal shall include, but not be limited to, the following:

1) Start and Stop Points

2) Modify Setpoints

3) Modify PID Loop Setpoints

4) Override PID Control

5) Change Time/Date

6) Add/Modify Start/Stop Weekly Scheduling

7) Add/Modify Setpoint Weekly Scheduling

8) Enter Temporary Override Schedules

9) Define Holiday Schedules

10) View Analog Limits

11) Enter/Modify Analog Warning Limits

12) Enter/Modify Analog Alarm Limits

13) Enter/Modify Analog Differentials

14) View Point History Files

d. The DDC panel Operator Terminal shall provide access to all real or calculated points in the controller to which it is connected, or any other controller in the network. This capability shall not be restricted to a set of predefined "global points," but shall provide totally open exchange of data between the operator terminal and any DDC panel in the network.

e. Operator access at all DDC panel Operator Terminals shall be identical to each other, as well as identical to the PC or Laptop Operator Workstations. Any password changes shall automatically be downloaded to all DDC controllers on the network.

f. The DDC panel operator terminal shall provide English language prompting to eliminate the need for the user to remember command formats or point names.

Prompting shall be provided consistent with a user's password clearance and the types of points being displayed, to eliminate the possibility of operator error.

g. A multi-function touchpad shall be provided for point and command selection, as well as parameter entry. To minimize the possibility of operator error, the DDC panel Operator Terminal shall change and limit touchpad functions based upon an operator's password clearance, the function being performed, and types of points being displayed. Screen displays shall clearly indicate only valid touchpad functions.

h. Context-Sensitive Help: On-line, interactive user's "Help" manuals and tutorials shall be provided. Based upon operator request, the "help" function shall provide general system operating instructions, and specific descriptions of commands available in the currently displayed menus.

i. Identification for all real or calculated points shall be consistent for all network devices. The same English language names used at PC workstations shall be used to access points at the DDC panel Operator's Terminal to eliminate cross-reference or look-up tables.

j. In addition to instantaneous summaries, the DDC panel Operator's Terminal shall allow a user to view a Point History file for system points. Point History files shall provide a record of value of analog points over the last 24 hours, at 30¬minute intervals, or a record of the last ten status changes for binary type points.

L. DDC Terminal Box Controllers

1. ATC contractor shall provide microprocessor based Terminal Unit Controllers for variable air volume terminal boxes. ATC contractor shall have responsibility for the provision of damper actuator, microprocessor based controller, control transformer, velocity pressure transducer, room sensors and all control wiring.

a. ATC shall have responsibility for startup, checkout, calibration and replacement of all control system components. ATC shall have responsibility of mounting control components whether components are mounted in the field or at the box manufacturer's plant.

b. ATC shall determine compatibility of pressure sensor output provided with terminal box with transducer and control software and provide appropriate and compatible components.

c. Terminal Unit Control System shall perform sequences of control as described on the drawings. In general, the controller shall provide for cooling, warm up, night heating, tenant override. See sequences for specific requirements.

d. Provide one (1) portable operator's terminal for balancers use during balancing, with unit being provided to DCAMM when balancing is done. Operator's terminal shall permit readout of system variables, override control and adjustment of control parameters. Operator's terminal shall be hand held, complete with keyboard and plug directly into wall mounted sensors for power and data.

e. The controls contractor shall ensure that the control transformer which he provides is compatible with the electrical power feed to each terminal box, and with the requirements of the fan and electric coil provided with terminal fan box (or provided under the work of the mechanical section if a duct mounted coil).

M. DDC Terminal Box Monitoring and Control Functions

1. From the central LED monitor display and from a portable operators terminal, it shall be possible to provide the following control and monitoring functions for each DDC terminal box:

a. Indicate system status (heating, cooling, out of control range).

b. Display, set and manually override minimum and maximum air duct flow in cfm.

Display actual cfm.

c. Display space temperature.

d. Display, set and manually override space temperature setpoint and deadband.

e. Set and change heating/cooling deadband.

f. Display damper and valve position in percent open notation.

g. Command damper and valve position in percent open notation.

h. Select application mode.

i. Assign terminal control unit address.

j. Display and manually override reheat.

k. Set and change control loop gains.

l. Change unoccupied/occupied mode.

N. DDC Sensors and Point Hardware

1. General

a. When providing instruments with 4-20 mA transmitters and conversation to voltage is required at DDCFP, controls contractor shall provide 250 ohm 1% precision resistor.

2. Alarms

a. Alarm contacts shall be wired normally closed (NC). When in alarm condition or if wire to contact is opened (wire cut), DDCFP shall sense condition and generate alarm.

b. Common alarms shall be wired relay coils in parallel with common alarm pilot light or to alarm terminals on manufacturer's control panel. Contacts shall input to

DDCFP. Line printer shall indicate normal or alarm.

c. Chiller alarm shall be taken from common alarm contacts in each chiller control panel wired in series back to DDCFP as one alarm point.

d. Provide two binary inputs from each smoke control FOP (Firefighter's Override

Panel) switch as specified under smoke control sequences.

1) Do not generate interlock sequences and printouts without Designer’s approval. All control wiring between the FOP and DDC panel, motor starters, and controlled devices shall be performed under the work of this section. This includes wiring the indicator lights at the FOP.

3. DDC Sensors and Point Hardware

a. Temperature Sensors and Transmitters

1) Temperature sensors shall conform to the following minimum standards.

Additional specifications are given for specific applications below.

a) (Sensors shall be accurate to +0.25°F over minimum operating ranges.

b) (Sensor, associated circuitry and readout shall have minimum resolution of 0.25°F.

c) (Sensors shall withstand ambient temperatures of -30°F to 240°F, but performance requirements must be met only for ranges specified.

2) Provide thermistor (1000 ohms or greater) or resistance temperature detector

(RTD) sensors, for the following applications and minimum operating ranges.

a) Wall Mount Space Sensor: 40° F to 100°F

b) Duct Mount Sensor: 20°F to 120°F

c) Chilled Water Sensor: 32°F to 80°F

d) Condenser Water Sensor: 40°F to 100°F

e) Hot Water Sensor: 32°F to 210°F

3) Provide thermistor (1000 ohms or greater) or resistance temperature detector

(RTD) sensors, for outside air temperature measurement. Sensor shall be mounted in 24 hour shade location, in proximity to a light colored wall, in an aspirated enclosure insulated with foam from thermal transfer with adjacent structure. Sensor shall operate within the following minimum range: -20°F to

120°F.

4) Provide averaging resistance temperature detector (RTD) sensor only, for mixed air measurement. Sensor shall provide a minimum duct coverage of 1 foot per 2 feet of duct. Sensor shall not come in direct contact with water or steam coils. The sensor shall operate within the following range: 30°F to

120°F.

5) Provide wall mount sensor for range specified above. Where sensors are mounted in private office spaces they shall have a local setpoint adjustment.

The SP range can be limited from DDCFP or front end computer. All other sensors shall have blank face plates. Sensors shall have features as listed:

a) Private Offices

(1). Setpoint adjustment

(2). Thermometer

(3). After hours occupancy switch (momentary)

(4). Plug in jack for terminal communication.

b) Common areas

(1). Setpoint adjustment

(2). Thermometer

(3). After hours occupancy switch (momentary)

(4). Plug in jack for terminal communication.

b. Flow Instruments

1) All flow sensors shall conform to the following minimum standards.

a) Sensor shall be accurate to a total of 3% over operating range.

b) Sensor shall be sized for 110% of maximum flow and shall not exceed manufacturer's flow rating.

c) Sensor, associated circuitry, and readout shall have a minimum range ability of 10:1 over assigned flow range.

d) Sensor and transmitter shall operate over a temperature range of 32°F to

210°F.

e) Maximum pressure drop across sensor shall be equivalent to 10 feet same size pipe (inlet or outlet pipe size).

f) Sensor shall be factory calibrated for the specific application according to the range, fluid density, and specific gravity.

c. Humidity Sensors and Transmitters

1) Humidity accuracy shall be + 5% at full scale. Sensors shall contain integral single point calibration potentiometer.

2) Sensors shall be mounted so field calibration may be done without disrupting sensor operation. For duct mounted transmitters, coordinate access panel for field calibration/verification with sheetmetal.

3) Sensors shall be by Vaisala, General Eastern, Staefa, or approved equal.

4) Provide hand held field calibration tool compatible with calibration plug on humidity sensors. Calibration tool shall have the ability to read the humidity of our air stream, humidity of mounted sensors and differential between calibration tool and mounted sensor.

5) Sensors shall be manufactured by Vaisala or approved equal.

d. Pressure Sensors and Transmitters, General:

1) All pressure…