SECTION 15915DIRECT DIGITAL CONTROL SYSTEM

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Copyright 2011 - 2014 ARCAT, Inc. - All rights reserved

PART 1 GENERAL

1.1 SECTION INCLUDES

A. Direct Digital Control System, using electric/electronic actuators for control of the following equipment:1. Air Handling Units.2. VAV Boxes.3. Fume Hoods.4. Unit Heaters.5. Unit Ventilators.6. Hot Water Heating System.7. Chilled Water System.8. Direct Expansion Systems.

1.2 RELATED SECTIONS

A. Section 13800 - Building Automation and Control: For overall building automation and control systems.

B. Section 15100 - Building Services Piping: Piping, Valves, fittings.

C. Section 15500 - Heat Generation Equipment.

D. Section 15600 - Refrigeration Equipment.

E. Section 15710 - Unit Heaters.

F. Section 15720 - Air Handling Units.

G. Section 15760 - Unit Ventilators.

H. Section 15800 - Air Distribution: Ducts and Duct Accessories.

I. Section 15840 - VAV Boxes.

J. Section 15905 - HVAC Instrumentation: Control system components.

K. Section 15940 - Sequence of Operation: Sequences of operation implemented using products specified in this section.

L. Section 15950 - Testing and Balancing.

M. Section 16150 - Wiring Connections: Execution requirements for electric connections specified by this section.

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1.3 REFERENCES

A. ASHRAEStandard 62 - Ventilation for Acceptable Indoor Air Quality.

B. ASHRAE SSPC 135 - ASHRAE Standing Standard Project Committee 135: BACnet - A Data Communication Protocol for Building Automation and Control Networks.

1.4 DESIGN / PERFORMANCE REQUIREMENTS

A. Automatic temperature controls field monitoring and control system using field programmable microprocessor based units.

B. Base system on distributed system of fully intelligent, stand-alone controllers, operating in a multi-tasking, multi-user environment on token passing network, with central and remote hardware, software, and interconnecting wire and conduit.

C. Provide computer software and hardware, operator input/output devices, control units, local area networks (LAN), sensors, control devices, actuators.

D. Provide controls for variable air volume terminals, radiation, reheat coils, unit heaters, fan coils, and other equipment when directly connected to control units. Individual terminal unit control is specified in Section 15905.

E. Provide control systems consisting of thermostats, control valves, dampers and operators, indicating devices, interface equipment and other apparatus and accessories to operate mechanical systems, and to perform functions specified.

F. Provide installation and calibration, supervision, adjustments, and fine tuning necessary for complete and fully operational system.

1.5 SUBMITTALS

A. Submit under provisions of Section 01300.

B. Product Data: Manufacturer's data sheets on each product to be used, including:1. Dimensions, capacities, performance characteristics, electrical requirements, and

material finishes.2. Storage and handling requirements and recommendations.3. Preparation instructions and recommendations.4. Installation and start-up methods.

C. Shop Drawings:1. Network Block Diagrams or System Riser Diagrams depicting all DDC components

that make up the network. Include specific detail on network terminations, and panel power requirements, stating where the DDC panels are to be powered from and the equipment that it is controlling for each DDC panel within the diagram.

2. Point-to-point Termination Detail drawings for each unique control application type. Drawings that are typical of one another shall state the quantity that they represent, and the specifics for each including all wiring and piping required to install and operate the system. For terminations that are unknown at the time of submittal, properly designate these as "Field determined terminations," and include in the As-built Drawings after completion. All wiring and piping shall be either number or color-coded on the drawings.

3. Provide individual details for each control type, as described in the Sequence of Operation specified in Section 15940.

4. Provide damper and valve schedules showing sizes, characteristics, model numbers, and specific locations.

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5. Prefabricated control panels drawings with panel interior and exterior layout details depicting the equipment layout and panel wiring and piping details.

6. Color Graphics Flow Chart showing the graphic screen layouts and the manner in which the screens are to be linked. Include the actual screen layout, point information locations, and samples of colors typically used.

7. Include detailed information on the point naming convention to be used. Provide documentation on all sequences of operation that cannot be performed by stand-alone controls, and require high-level programs to be created.

D. Manufacturer's Certificates: Certify products meet or exceed specified requirements.

E. Closeout Submittals: Provide manufacturer's maintenance instructions that include recommendations for periodic checking and adjustment of system and periodic cleaning and maintenance of all components.

F. Project Record Documents: Record actual locations of control components, including control units, thermostats, and sensors.1. Revise shop drawings to reflect actual installation and operating sequences.2. Submit all data specified in "Submittals" in final "Record Documents" form.

G. Operation and Maintenance Data: Provide operation and maintenance data as a manual that is properly organized and tabbed in a suitable binder.1. Interconnection wiring diagrams complete field installed systems with identified and

numbered, system components and devices.2. Keyboard illustrations and step-by-step procedures indexed for each operator

function.3. Setpoint adjustment and scheduling modifications.4. Operation and sequencing instructions of control loops for all mechanical equipment

being controlled5. Submit inspection period, cleaning methods, cleaning materials recommended, and

calibration tolerances.

1.6 QUALITY ASSURANCE

A. Manufacturer Qualifications: Company specializing in manufacturing products specified in this section with minimum five years documented experience.

B. Manufacturers Field Representation: Field representative that has been trained in the installation, programming, and commissioning of the equipment specified and in the direct employ of the Controls Manufacturer and be factory trained.

C. Installer Qualifications: Company specializing in performing Work of this section with minimum three years documented experience.

1.7 DELIVERY, STORAGE, AND HANDLING

A. Store products in manufacturer's unopened packaging until ready for installation.

1.8 WARRANTY

A. Warranty for the entire control system shall commence upon completion of the system startup and commissioning and acceptance by the Owner.

B. Provide a two year warranty on all DDC controllers.

1.9 MAINTENANCE SERVICE

A. See Section 01700 - Execution Requirements: Requirements for maintenance service.

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B. Furnish service and maintenance of control systems for ______ years from Date of Substantial Completion.

C. Furnish four complete inspections per year, to inspect, calibrate, and adjust controls. Submit written report after each inspection.

D. Examine unit components bi-monthly. Clean, adjust, and lubricate equipment.

E. Include systematic examination, adjustment, and lubrication of unit, and controls checkout and adjustments. Repair or replace parts in accordance with manufacturer's operating and maintenance data. Use parts produced by manufacturer of original equipment.

F. Perform work without removing units from service during building normal occupied hours.

G. Provide emergency call back service during working hours for this maintenance period.

H. Maintain locally, near project location, adequate stock of parts for replacement or emergency purposes. Have personnel available to ensure fulfillment of this maintenance service, without unreasonable loss of time.

I. Perform maintenance work using competent and qualified personnel under supervision and in direct employ of manufacturer or original installer.

J. Do not assign or transfer maintenance service to agent or subcontractor without prior written consent of Owner.

PART 2 PRODUCTS

2.1 MANUFACTURERS

A. Acceptable Manufacturer: American Auto-Matrix, which is located at: One Technology Ln. ; Export, PA 15632 ; Tel: 724-733-2000 ; Fax: 724-327-6124 ; Email:request info (rmoore@aamatrix.com); Web:www.aamatrix.com

B. Substitutions: Not permitted.

C. Requests for substitutions will be considered in accordance with provisions of Section 01600.

2.2 DIRECT DIGITAL CONTROL SYSTEM

A. General: Provide a Thermostatic Controller/Building Automation System (TC/BAS) system that utilizes the BACnet communications protocol conforming to ASHRAE SSPC 135. The system must also support high-speed 10 Mb/s Novell or IP Ethernet communications

B. Network Area Controller (NAC): Provide Network Area Controllers (NAC) for all equipment to be controlled as indicated on the Drawings and the sequence of operation specified in Section 15940.1. Network Area Controllers (NAC) shall provide the interface between the LAN or WAN

and the field control devices, and provide global supervisory control functions over the control devices connected to the NAC. It shall be capable of executing application control programs to provide:a. Calendar functions through iCalendar protocol applications such as Outlook

2007, Google Calendar, Apple iCal, etc.b. Scheduling through iCalendar protocol applications such as Outlook 2007,

Google Calendar, Apple iCal, etc.c. Trending to open source database formats such as MySQL and SQLite.d. Alarm monitoring and routing with alarm recording and historical archiving to

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open source database formats such as MySQL and SQLite.e. Time synchronization via internet time servers utilizing NTP methodology.f. Integration of BACnet controller data.

2. Network Area Controller must provide the following minimum hardware features:a. One Ethernet Port - 10/100 Mbpsb. One RS-232 portc. One or more RS-485 portsd. Battery Backup Capabilitye. Capable of operation over a temperature range of 32 to 122 degrees F.f. Capable of operation over a humidity range of 0 to 80 percent RH, non-

condensing3. NAC shall support standard Web browser access via the Intranet/Internet.4. Event Alarm Notification and actions:

a. NAC shall provide alarm recognition, storage; routing, management, and analysis to supplement distributed capabilities of equipment or application specific controllers.

b. NAC shall be able to route any alarm condition to any defined user location whether connected to a local network or remote via, or wide-area network.

c. Alarm generation shall be selectable for annunciation type and acknowledgement requirements including but limited to:1) To alarm.2) Return to normal.3) To fault.

d. Provide for the creation of alarm classes for the purpose of routing types and or classes of alarms, i.e.: security, HVAC, Fire, etc.

e. Provide timed (schedule) routing of alarms by class, object, group, or node.f. Provide alarm generation from binary object "runtime" and /or event counts for

equipment maintenance. User shall be able to reset runtime or event count values with appropriate password control.

5. Control equipment and network failures shall be treated as alarms and annunciated.6. Alarms shall be annunciated in any of the following manners as defined by the user:

a. Screen message text.b. Email of the complete alarm message to multiple recipients. Provide the ability

to route and email alarms based on:1) Day of week.2) Time of day.3) Recipient.

c. Graphic with flashing alarm object(s).d. Twitter notification.e. RSS feeds.

7. The following shall be recorded by the NAC for each alarm (at a minimum):a. Time and date.b. Location (building, floor, zone, office number, etc.).c. Equipment (air handler #, VAV, etc.).d. End device (Temp sensor, smoke detector, etc.).e. Acknowledge time, date, and user who issued acknowledgement.

8. Alarm actions may be initiated by user defined programmable objects created for that purpose.

9. Defined users shall be given proper access to acknowledge any alarm, or specific types or classes of alarms defined by the user.

10. A log of all alarms shall be maintained by the NAC and/or a server (if configured in the system) and shall be available for review by the user.

11. Provide a "query" feature to allow review of specific alarms by user defined parameters.

12. A separate log for system alerts (controller failures, network failures, etc.) shall be provided and available for review by the user.

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13. An Error Log to record invalid property changes or commands shall be provided and available for review by the user.

C. Data Collection and Storage: NAC shall have the ability to collect data for any property of any object and store this data for future use.1. Data collection shall be performed by log elements, resident in the NAC that has, at a

minimum, the following configurable properties:a. Designating the log as interval or deviation.b. For interval logs, the object shall be configured for time of day, day of week and

the sample collection interval.c. For deviation logs, the object shall be configured for the deviation of a variable

to a fixed value. This value, when reached, will initiate logging of the object.d. For all logs, provide the ability to set the maximum number of data stores for

the log and to set whether the log will stop collecting when full, or rollover the data on a first-in, first-out basis.

e. Each log shall have the ability to have its data cleared on a time-based event or by a user-defined event or action.

2. All log data shall be stored in a relational SQL database in the NAC and the data shall be accessed from a server (if the system is so configured) or a standard Web browser.

3. All log data, when accessed from a server, shall be capable of being manipulated using standard SQL statements.

4. All log data shall be available to the user on-demand, or on scheduled intervals in the following data formats:a. HTML.b. XML.c. Plain Text.d. Comma or tab separated values.e. PDF.f. Excel.

5. Systems unable to provide log data in PDF and Excel formats at a minimum shall not be acceptable.

6. NAC shall have the ability to archive its log data either locally (to itself), or remotely to a server or other NAC on the network. Provide the ability to configure the following archiving properties, at a minimum.a. Archive on time of day.b. Archive on user-defined number of data stores in the log (buffer size).c. Archive when log has reached its user-defined capacity of data stores.d. Provide ability to clear logs once archived.

D. Database Backup and Storage: NAC shall have the ability to automatically backup its database. Database shall be backed up based on a user-defined time interval.1. Copies of the current database and the most recently saved database shall be stored

in the NAC. The age of the most recently saved database is dependent on the user-defined database save interval.

2. NAC database shall be stored, at a minimum, in SQL format to allow for user viewing and editing, if desired.

E. Web Browser Clients: System shall be capable of supporting an unlimited number of clients using a standard Web browser such as Internet Explorer, Mozilla Firefox, Google Chrome and Apple Safari. Systems requiring proprietary software to enable a standard Web browser to be resident on the client machine. Manufacture-specific browsers will not be acceptable. To ensure site security for web-enabled browsing, plug-ins requiring the use of Active-X or Flash technology are not acceptable.1. Web browser software shall run on any operating system and system configuration

that is supported by the Web browser. Systems that require specific machine

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requirements in terms of processor speed, memory, etc., in order to allow the Web browser to function with the FMCS, shall not be acceptable.

2. Web browser shall provide the view of the system, in terms of graphics, schedules, calendars, logs, etc.

3. Web browser client shall support at a minimum, the following functions:a. User log-on identification and password shall be required. Security using Java

authentication and encryption techniques to prevent unauthorized access shall be implemented. .

b. Graphical screens developed for the GUI shall be the same screens used for the Web browser client. Any animated graphical objects supported by the GUI shall be supported by the Web browser interface.

c. HTML programming shall not be required to display system graphics or data on a Web page. HTML editing of the Web page shall be allowed if the user desires a specific look or format.

d. Storage of the graphical screens shall be in the Network Area Controller (NAC), without requiring any graphics to be stored on the client machine. Systems that require graphics storage on each client are not acceptable.

e. Real-time values displayed on a Web page shall update automatically without requiring a manual "refresh" of the Web page.

f. Users shall have administrator-defined access privileges. Depending on the access privileges assigned, the user shall be able to perform the following:1) Modify common application objects, such as schedules, calendars, and

set points in a graphical manner.2) View logs and charts.3) View and acknowledge alarms.4) Setup and execute SQL queries on log and archive information.

g. Graphic screens on the Web Browser client shall support hypertext links to other locations on the Internet or on Intranet sites, by specifying the Uniform Resource Locator (URL) for the desired link.

F. Server Functions and Hardware: Provide system with a central server that supports all Network Area Controllers (NAC) connected to the customer's network whether local or remote.1. Local connections shall be via an Ethernet LAN. Remote connections can be via

ISDN, ADSL, T1, etc.2. It shall be possible to provide access to all Network Area Controllers via a single

connection to the server. In this configuration, each Network Area Controller can be accessed from a remote standard Web browser (WBI) by connecting to the server.

3. Server shall provide the following functions, at a minimum:a. Global Data Access: Provide complete access to distributed data defined

anywhere in the system.b. Distributed Control: Provide the ability to execute global control strategies

based on control and data objects in any NAC in the network, local or remote.c. Include a master clock service for its subsystems and provide time

synchronization for all Network Area Controllers (NAC).d. Accept time synchronization messages from trusted precision Atomic Clock

Internet sites and update its master clock based on this data.e. Provide scheduling for all Network Area Controllers and their underlying field

control devices.f. Implement the BACnet Command Prioritization scheme (16 levels) for safe and

effective contention resolution of all commands issued to Network Area Controllers. Systems not employing this prioritization shall not be accepted.

g. Provide central alarm management for all Network Area Controllers supported by the server including:1) Routing of alarms to display, Twitter, RSS feed, email and SMS text via

email.

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2) View and acknowledge alarms.3) Query alarm logs based on user-defined parameters.

h. Provide central management of log data for all Network Area Controllers supported by the server. Log data shall include process logs, runtime and event counter logs, and error logs. Log data management shall include:1) Viewing and printing log data.2) Exporting log data to other software applications.3) Query log data based on user-defined parameters.

4. Server Hardware Requirements: Server hardware platform shall have the following requirements:a. Computer shall be a Dual Core Intel Atom based computer, minimum

processing speed of 1.8 Ghz with 1 GB RAM and a 64-gigabyte minimum solid-state drive. Implementations utilizing traditional magnetic storage (HDD), or legacy compact flash (CF) shall not be acceptable.

b. Server operating system shall be Linux based. To ensure site security remains intact, server implementations utilizing Microsoft Windows technology is not acceptable.

c. Connection to the FMCS network shall be via an Ethernet network interface card, 10/100/1000 Mbps.

G. System Programming: Graphical User Interface software (GUI) shall provide the ability to perform system programming and graphic display engineering as part of a complete software package.1. Provide a library of control, application, and graphic objects to enable the creation of

all applications and user interface screens. Applications are to be created by selecting the desired control objects from the library, pasting them on the screen, and linking them together using a built in graphical connection tool. Completed applications may be stored in the library for future use. Graphical User Interface screens shall be created in the same fashion. Data for the user displays is obtained by graphically linking the user display objects to the application objects to provide "real-time" data updates. Any real-time data value or object property may be connected to display its current value on a user display. Systems requiring separate software tools or processes to create applications and user interface displays shall not be acceptable.

2. Programming Methods:a. Provide the capability to copy objects from the supplied libraries, or from a

user-defined library to the user's application. Objects shall be linked by a graphical linking scheme by dragging a link from one object to another. Object links will support one-to-one, many-to-one, or one-to-many relationships. Linked objects shall maintain their connections to other objects regardless of where they are positioned on the page and shall show link identification for links to objects on other pages for easy identification.

b. Configuration of each object will be done through the object's property panel using fill-in the blank fields, list boxes, and selection buttons. Use of manufacturer-specific procedural language for configuration will not be accepted.

c. The software shall provide the ability to view the logic in a monitor mode. When on-line, the monitor mode shall provide the ability to view the logic in real time for easy diagnosis of the logic execution. When off-line (debug), the monitor mode shall allow the user to set values to inputs and monitor the logic for diagnosing execution before it is applied to the system.

d. System shall support object duplication within a customer's database. An application, once configured, can be copied and pasted for easy re-use and duplication. All links, other than to the hardware, shall be maintained during duplication.

H. Object Libraries: Provide a standard library of objects for development and setup of

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application logic, user interface displays, system services, and communication networks.1. Objects in this library shall be capable of being copied and pasted into the user's

database and shall be organized according to their function. In addition, the user shall have the capability to group objects created in their application and store the new instances of these objects in a user-defined library.

2. In addition to the standard libraries specified here, the manufacturer shall maintain an on-line accessible (over the Internet) library, available to all registered users to provide new or updated objects and applications as they are developed.

3. All control objects shall conform to the control objects specified in the BACnet specification.

4. The object library shall include objects to support the integration of devices connected to the Network Area Controller (NAC). At a minimum, provide the following as part of the standard library included with the programming software:a. For BACnet devices, provide the following objects at a minimum:

1) Analog In2) Analog Out3) Analog Value4) Binary5) Binary In6) Binary Out7) Binary Value8) Multi-State In9) Multi-State Out10) Multi-State Value11) Schedule Export12) Calendar Export13) Device

b. For each BACnet object, provide the ability to assign the object a BACnet device and object instance number.

c. For BACnet devices, provide the following support at a minimum:1) Read Property2) Read Property Multiple3) Write Property4) Write Property Multiple5) Who-has6) I-have7) Who-is8) I-am9) Ethernet10) BACnet IP Annex J11) MSTP12) BACnet Broadcast Management Device (BBMD) function13) Foreign Device Registrar14) Routing

I. MODBUS System Integration: Network Area Controller shall support the integration of device data from Modbus RTU or TCP control system devices. The connection to the Modbus system shall be via a RS485 or Ethernet IP as required by the device.1. Provide the required objects in the library, included with the Graphical User Interface

programming software, to support the integration of the Modbus system data into the FMCS. Objects provided shall include at a minimum:a. Read/Write Modbus AI Registersb. Read/Write Modbus AO Registersc. Read/Write Modbus BI Registersd. Read/Write Modbus BO Registers

2. All scheduling, alarming, logging and global supervisory control functions, of the

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Modbus system devices, shall be performed by the Network Area Controller.3. FMCS supplier shall provide a Modbus system communications driver. Provide with

documentation of the system's Modbus interface and factory support at no charge during system commissioning

J. Graphical User Interface Computer Hardware (Desktop):1. Browser workstation shall be an Intel Pentium based computer, minimum processing

speed of 2.4 Ghz with a minimum of 1.0 GB RAM and a 80-gigabyte minimum hard drive). Include with a DVD-ROM/CD-RW Combination Drive and 4-USB ports.

2. Operating system shall be Windows XP Professional and it shall include a web browser, Internet Explorer, Firefox, etc. for access to the NAC/central BAS server via the Web.

3. Provide with a minimum 17 inch flat panel color monitor, 1280 x 1024 optimal preset resolution, 25 ms response time.

4. Connection to the FMCS network shall be via an Ethernet network interface card, 10/100 Mbps.

5. Add option for wireless network card.6. Provide with a system printer, laser type with a minimum 600 x 600-dpi resolution and

rated for 8 PPM minimum print speed.

K. Graphical User Interface Computer Hardware (Portable Operator Terminal)1. Laptop computer shall be an Intel Pentium based laptop computer, minimum

processing speed of 2 Ghz with a minimum of 1 GB RAM and a 80-gigabyte minimum hard drive. Include with a CD-ROM drive and 3-USB ports. Operating system shall be Windows XP Professional and it shall include a web browser, Internet Explorer, Firefox, etc. for access to the NAC/central BAS server via the Web.

2. Connection to the FMCS network shall be via an Ethernet network interface card, 10/100 Mbps.

3. Add option for wireless network card.4. Provide with a system printer, laser type with a minimum 600 x 600-dpi resolution and

rated for 60 PPM minimum print speed.5. User shall have the ability to monitor and modify all of the inputs, setpoints, outputs

and operating parameters of the any unitary controller on the network by connecting to any zone monitoring module anywhere on the network or tapping into the network at any controller.

6. POT interface shall be a portable interface to the unitary controllers.7. POT interface shall communicate on a peer to peer basis concurrently with Building

Automation Systems or unitary controllers and shall be capable of integrating and dynamically displaying all monitoring points, setpoints, outputs and schedules for every unit on the same network.

L. Unitary Controllers:1. Programmable Unitary Controllers (PUCs)

a. Each PUC shall be a dedicated, stand-alone, microprocessor-based, unitary controller designed to control the HVAC plant, control sequences, and point configurations specified in Section 15940.

b. PUC shall utilize user programmable function modules and a user customized programming language as required to meet the functional intent of all control sequences on a stand-alone basis. PUC shall be capable of communicating global and critical variables to other PUCs residing on the same network without the intervention of a higher level controller. PUC shall operate with a high-speed 32-bit processor and must be BTL-listed as a B-AAC (BACnet-Advanced Application Controller) conforming to ASHRAE SSPC 135.

c. Universal inputs shall include the following minimum requirements:1) Minimum of eight universal inputs per controller.2) Configurable for 0-10VDC, 0-20 mA, thermistor, or dry contact type input

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signals.3) Minimum 100 millisecond update time per input.4) Inputs shall be minimum 24-bit analog to digital resolution. Manufacturers

who cannot meet this resolution requirement shall provide Industrial grade Programmable Logic Controllers (PLCs).

5) Capable of digital input pulse rates to 20 Hz.d. Digital outputs shall include the following minimum requirements:

1) Minimum five triac outputs per controller rated at 10-29 VAC, 1A.2) LED status indication.

e. Analog outputs shall include the following minimum requirements:1) Minimum of four analog outputs per controller.2) Minimum 100 millisecond update time per output.3) Outputs selectable as either a 0-10V or 0- 20mA signal with 12 bits of

resolution.f. Communication Networks:

1) PUC shall utilize optically isolated, 2-wire twisted shielded EIA-485 line signaling for portable operator terminal, color graphic operator station, or NAC and shall utilize the BACnet MS/TP communications protocol designed to control the HVAC plant, control sequences, and point configurations specified in Section 15940.

2) PUCs shall communicate at speeds up to and including 76.8K baud and shall utilize a token passing scheme to accommodate concurrent communication with multiple network devices.

3) Failure of one PUC shall not affect the operation of other PUCs on the network.

g. Nonvolatile Memory:1) All PUC's operating parameters, setpoints, and schedules shall be stored

in battery backed RAM, EEPROM or other nonvolatile memory.2) A minimum 16 KB RAM shall be built in to the PUC for customized

control sequence programming.3) Program parameters shall be stored during a power outage for a

minimum of one year.h. Terminations: PUC terminations shall be pluggable screw terminal blocks for

connection of input and output signal wiring. Spade type connectors or insulation displacement connectors shall not be accepted.

i. Input Power: Input power requirements for the PUC shall be 24VAC, 50/60 Hz, 100 VA maximum. Controller power supply shall be separate from any other used for motor control coils.

j. Operating Environment: Microprocessor board shall be suitably packaged in steel for protection against electrical transients and be capable of operating within environmental conditions of 32 - 122 degree F (0 - 50 degrees C) and 0 - 80 percent Rh, non-condensing.

k. PUC firmware shall be upgradeable through flash memory.l. Application Programming:

1) Application program sequences shall be accomplished by writing the specified sequence off-line using an ASCII text editor. Programs shall be downloaded to the PUC prior to commissioning. All application programming provided to accomplish the sequence of operations described in this section shall be provided by the BAS control system manufacturer and proven in similar applications.

2) The program language shall permit subroutines, single data arrays, arithmetical operations, multiple comment lines, and complex algorithms to be implemented in full compliance with the sequences of operation. The program shall be capable of being compiled off-line and downloaded from a network connected computer. The program shall reside in the nonvolatile battery backed-up RAM.

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2. Application-Selectable Controllers (ASCs)a. Each ASC controller shall be a dedicated, stand-alone, microprocessor-based,

application-specific unitary controller designed to control the HVAC plant, control sequences, and point configurations specified in Section 15940. The ASC shall operate with a high-speed 16-bit processor. ASC must be BTL-listed as a B-ASC (BACnet-Application Selectable Controller), or B-SS (BACnet-Smart Sensor) conforming to ASHRAE SSPC 135.

b. ASC controller shall utilize user programmable function modules as required to meet the functional intent of all control sequences on a stand-alone basis.

c. Universal inputs shall include the following minimum requirements:1) Five universal inputs and one optically isolated digital input per controller.2) Configurable for 0-10VDC, 0-20ma, thermistor, or dry contact type input

signals with 15-bit resolution.d. Digital outputs shall include the following minimum requirements:

1) Five relay outputs per controller rated at 1A, 24VAC/VDC.e. Analog outputs shall include the following minimum requirements:

1) Four analog outputs per controller. Manufacturers who cannot meet this requirement shall provide mounted floating output to analog output transducers for reheat valves.

2) 0-10VDC output signal.f. Communication Networks:

1) ASC shall utilize optically isolated, 2-wire twisted shielded EIA-485 line signaling for portable operator terminal, color graphic operator station, or NAC and shall utilize the BACnet MS/TP communications protocol designed to control the HVAC plant, control sequences, and point configurations specified in Section 15940.

2) ASCs shall communicate at speeds up to and including 76.8k baud and shall utilize a token passing scheme to accommodate concurrent communication with multiple network devices.

3) Failure of one ASC shall not affect the performance of other ASCs on the network.

g. Nonvolatile Memory: All ASC's operating parameters, setpoints, and schedules shall be stored in battery backed RAM, EEPROM or other nonvolatile memory.

h. ASCs firmware shall be upgradeable through flash memory over MS/TP without BAS interruption.

i. Input Power: Input power requirements for the ASC shall be 24VAC, 50/60 Hz, 20 VA maximum. The controller power supply shall be separate from any other used for motor control contractor coils.

j. Mounting: ASC shall be readily mounted by using pre-drilled holes or integral mounting lugs.

k. Operating Environment: The microprocessor board shall be suitably protected against electrical transients and be capable of operating within environmental conditions of minus 12 to 158 degrees F (minus 25 to 70 degrees C) and 10 to 90 percent Rh, non-condensing.

3. Zone Controller Hardware (VAV)a. Each Zone controller shall be a dedicated, stand-alone, microprocessor-based,

application-specific unitary controller designed to control the HVAC plant, control sequences, and point configurations specified in Section 15940. Zone Controller shall operate with a high-speed 16-bit processor. Zone Controller shall be equipped with an integrated Belimo damper actuator and the damper actuator shall operate with Motor Management Technology (MMT) for monitoring, identifying, and correcting motor shorts. VAV must be BTL-listed as a B-ASC (BACnet-Application Specific Controller) conforming to ASHRAE SSPC 135.

b. Zone Controller shall have automatic settings for VAV or CAV mode and employ separate heating and cooling options for supply mode.

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c. Universal inputs shall include the following minimum requirements:1) One dedicated zone temperature input and two configurable universal

inputs per controller.2) Configurable for 0-5VDC, 4-20ma, thermistor, or dry contact type input

signals with 15-bit resolution.3) Integrated flow sensor shall be standard on controller.

d. Digital outputs shall include the following minimum requirements:1) Five relay outputs per controller rated at 1A, 24VAC/VDC or five Triac

outputs per controller rated 1A, 30 VAC.2) Integrated Belimo damper actuator. Other damper actuator

manufacturers are unacceptable.e. Analog outputs shall include the following minimum requirements:

1) One analog output per controller. Manufacturers who cannot meet this requirement shall provide mounted floating output to analog output transducers for reheat valves.

2) 0-10VDC output signal.f. Communication Networks:

1) Zone Controller shall utilize optically isolated, 2-wire twisted shielded EIA-485 line signaling for portable operator terminal, color graphic operator station, or NAC and shall utilize the BACnet MS/TP communications protocol designed to control the HVAC plant, control sequences, and point configurations specified in Section 15940.

2) Zone Controller shall communicate at speeds up to and including 76.8k baud and shall utilize a token passing scheme to accommodate concurrent communication with multiple network devices.

3) Failure of one Zone Controller shall not affect the performance of other Zone Controllers on the network.

g. Zone controller firmware shall be upgradeable through flash memory over MS/TP without BAS interruption.

h. Nonvolatile Memory: All Zone Controller operating parameters, setpoints, and schedules shall be stored in battery backed RAM, EEPROM or other nonvolatile memory.

i. Input Power: Input power requirements for the Zone Controller shall be 24VAC, 50/60 Hz, 20 VA maximum. The controller power supply shall be separate from any other used for motor control contractor coils.

j. Mounting: Zone Controller shall be readily mounted by using pre-drilled holes or integral mounting lugs and will also mount directly to the VAV box shaft.

k. Operating Environment: The microprocessor board shall be suitably protected against electrical transients and be capable of operating within environmental conditions of minus 12 to 158 degrees F (minus 25 to 70 degrees C) and 10 to 90 percent Rh, non-condensing.

M. Temperature Sensors (Stats):1. Digital Zone Sensors: Provide a graphical display temperature sensor for all room

temperature sensors. Sensors shall exhibit the following specifications:2. Installation

a. Sensor will be a 2-wire device for power and communications.b. Wiring should be polarity insensitive and shall not require specific cabling other

than 18 AWG twisted shielded.c. A 2-piece design is required with base and display so that the base can be

mounted prior to commissioning and the display can be mounted during the finished stages.

3. Temperature sensinga. The stat shall utilize a Digital semiconductor for temperature sensing.b. Sensor shall be accurate to plus or minus 0.36 degrees F over a span of 55-

105 degrees F.

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4. Display: Graphical display with at least the capability of 122 x 32 pixels.5. Programming: Sensor shall allow configuration of the controller through menu driven

attributes.a. Allow for adjustment of setpoint via buttons mounted on the face.b. A 3-level password protection shall be incorporated for balancing menus and

installer set-up options.c. Balancing and configuration programming shall be accomplished by accessing

menus through the stat and will not require any other type of portable interface.d. User shall be able to access the entire network through the sensor connections

with the use of a Portable Operator Terminal (POT).6. Air Balancing: Sensor shall allow for air balancing of VAV terminal units directly

through each stat or through an additional stat plugged into the wall stat. Air balancing shall be accomplished through a password protected balancing menu.

7. Duct Sensors:a. Single point duct mounted sensors shall have a minimum 9 inch rigid probe and

be used when the duct size is less than 24 inches.b. Averaging duct mounted sensors shall have a minimum 12.5 feet long

averaging element and be used when the duct size is greater than 24 inches.8. Well Sensors

a. Liquid immersion sensors shall have a stainless steel probe and a brass well. Length of the sensor well shall be selected based on the diameter of the pipe to provide accurate, reliable sensing of the liquid temperature.

9. Outside Sensorsa. Sensing element shall be sheathed in a stainless steel tube and mounted inside

a ventilated, treated, PVC sun shield to minimize the radiant energy and wind effects.

N. Humidity Transmitters: 2-wire, 4-20 mA output type with a resistance or capacitance element having an accuracy of plus or minus 2 percent between 20-95 percent Rh. Transmitter shall include protection against reverse polarity and supply voltage transients. An accuracy adjustment shall be provided with each transmitter to allow for recalibration as necessary.1. Duct Mounted: Sensor shall have a minimum 6 inch rigid probe with a pressure cast

aluminum weatherproof box with gasketed cover.2. Wall Mounted: Room sensor cover shall be provided with tamper resistant screws.3. Outside Mounted: Sensing element shall be mounted inside a ventilated, treated,

plastic PCV sun shield to minimize the radiant energy and wind effects. Enclosure shall be a pressure cast aluminum, weatherproof box with a gasketed cover.

O. Pressure Transmitters: Pressure transmitters shall be of 2-wire, 4-20 mA output type with a capacitance element having an accuracy of plus or minus 1 percent over the entire range. Transmitter shall include protection against reverse polarity and supply voltage transients. An accuracy and zero span adjustment shall be provided with each transmitter to allow for recalibration as necessary.1. Duct Static Pressure.2. Building Differential Pressure:

a. Maximum safe momentary overpressure shall be eight times the pressure range.

b. Pressure transmitter shall be of solid-state design.c. Approved Manufacturer: Modus T30 series or equivalent.

3. Liquid Differential Pressure:a. Operating range shall be minus 40.0 to plus 176.0 degrees F.b. Maximum safe overpressure shall be 150 percent of the rated pressure.c. Shall be contained in an aluminum NEMA-1 enclosure.

P. Flow Transmitters:1. Airflow

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a. Sensor shall be a 4-20 mA output type with the accuracy of plus or minus 1 percent with flow straighteners in circular duct applications. In rectangular duct applications, the accuracy shall be plus or minus 2 percent with flow straighteners.

b. Velocity range of 100 to 10,000 FPM air at S.T.P.c. Flow station shall be constructed of steel with flanged face for easy mounting.

Flow straighteners shall be constructed of aluminum or steel.d. Approved manufacturer: Auto-Flow or equivalent.

2. Liquid Flow:a. Sensor shall be a 4-20 mA output type with the repeatability of plus or minus

0.1 percent of value.b. Temperature limits: minus 20.0 to 850.0 degrees F.c. Material is dependent upon that of the size and type of pipe material.d. Approved manufacturer: Dieterich Standard

Q. Air Quality Transmitters: Sensor shall be a 4-20 mA/1-5VDC output type and designed to monitor IAQ/CO2 levels in accordance with ASHRAE standard 62.

R. Freezestats:1. Heavy duty temperature controls that incorporate a vapor charged sensing element.2. Low temperature cut-out must be adjustable.3. Sensor shall have a 4-wire, two circuit contact that is designed to close when the main

contact opens.4. Must be wired in series with the fan.

S. Smoke Detectors: Provide with a dry set of contacts for the BAS and be compatible with the existing building's fire system.

T. Air Proving Switches:1. Air proving switches shall have an operating range of 0.15 - 0.5 inch WC and have a

setpoint adjustment.2. Wiring connections shall be three screw type, common, normally open, and normally

closed.3. Approved manufacturer: Dwyer 1900 series or equivalent.

U. Liquid Proving Switches:1. Proving switch shall measure the difference in pressure exerted upon its sensing

elements and operate a SPDT switch at the differential pressure setpoint.2. Differential pressure setpoint must be adjustable between the ranges of 8 - 60 psig

and the switch differential shall be 1.5 psi.3. Approved manufacturer: Penn A-74 series or equivalent.

V. Damper Position Switches:1. Crank mounted and provide two snap-action SPDT contacts. Each switch shall be

adjustable with a minimum differential of 9 degrees F.2. Approved manufacturer: Barber-Colman AM-321 or equivalent

W. Pneumatic Transducers:1. I/P transducers shall be of the high volume industrial type and not be affected by

vibration or position and shall meet the following specifications:a. Input range:4-20 mA or 0-10VDC.b. Input supply pressure: 20-25 psig.c. Output pressure: 3-15 psig.d. Maximum output flow: 10 SCFM.

X. Actuators:1. Pneumatic: Pneumatic damper actuators shall be acceptable when fitted with the

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before-mentioned current pressure transducer and pilot positioner or any other appurtenances, provides adequate torque to meet the application.

2. Electronic:a. Electronic actuators shall be acceptable if proposed model is driven directly by

either 4-20 mA or 0-10VDC, requires low voltage supply power (30VAC/VDC or less), and provides adequate torque to meet the application.

b. Electronic actuators shall be direct-coupled type, manufactured by Belimo Air Controls.

Y. Enclosures:1. Enclosures shall be NEMA-1 rated steel, finished to control oxidation in a highly humid

atmosphere.2. Each enclosure shall have a hinged door with handle and keyed lock.

Z. Control Valves1. Provide factory fabricated control valves with operators as required by this

specification. Provide selection as determined by manufacturer for installation requirements and pressure class, based on maximum pressure and temperature in piping system. Provide valve size in accordance with specified maximum pressure drop across control valve. Equipment control valves with heavy duty actuators, with proper shut off rating for each individual application.

2. Water Service Valves: Equal percentage characteristics for throttling service, linear characteristics for three-way mixing or diverting service, with a range of 30 to 1, and maximum full flow pressure drop of 5 psig. (Not less than 3 psig; not more than 7 psig). Two-position valves shall be line size.

3. Steam Service Valves: Linear characteristics for 90 percent of closing stroke and equal percentage for final 10 percent with range of 30 to 1, and maximum full flow of 80 percent of inlet pressure for low pressure systems, and 42 percent for high pressure systems. Two-position valves shall be line size.

4. Single Seated Valves: Cage type trim, providing seating and guiding surfaces for plug on "top and bottom" guided plugs.

5. Valve Trim and Stems: Polished stainless steel.6. Packing: Spring-loaded Teflon, self-adjusting.7. Bodies, 2 inches and Smaller: Bronze with screwed end connections, replaceable

brass seat. 125 psig rated, minimum.8. Bodies, 2-1/2 inches and Larger: Cast iron with flanged end connections, replaceable

brass seat. 125 psig rated, minimum.9. Butterfly Valves: Butterfly valves may be used for two-position or three3-way mixing or

diverting service for water applications 6 inch size and larger, provided valve pressure and temperature limitations are not exceeded by maximum pressures and temperatures in the piping system.

10. Refer to Section 15110 Valves for butterfly valve requirements.

AA. Dampers1. Provide automatic control dampers as indicated. All dampers shall be low leakage

airfoil blade types (Ruskin CD-50 or Arrow AFD).2. Construction:

a. Frames: Extruded aluminum hat channel, 0.125" minimum thickness.b. Blades: Extruded aluminum airfoil type, 6" maximum blade width.c. Hardware: Molded synthetic bearings. Zinc plated steel axles, linkage brackets,

connecting rods, and mounting bolts.d. Seals: Flexible metal compression seals on frame at blade ends; extruded vinyl

inflatable blade edge seals.3. Leakage: Not more than 6 CFM per square foot damper area at differential pressure

of 4 inch w.g. with applied torque at damper of 50 inch-pounds.4. Operating Limits:

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5. Temperature: Minus 20 to 200 degrees F.6. Pressure: 6 inch w.g. differential.7. Velocity: Up to 4000 FPM8. Select opposed blade dampers for proportional service. Parallel blade dampers may

be used for two-position service, or in mixed air application that promotes air mixing.9. Damper sizes shall be provided as indicated on the Drawings. Damper sizes may be

provided different from those indicated on the drawings, if improved performance can be demonstrated with calculations.

10. Combination Fire/Smoke Dampers: Dampers are provided in Section 15820 Duct Accessories. Refer to damper specification for operator type.

PART 3 EXECUTION

3.1 EXAMINATION

A. Do not begin installation until conditions have been properly prepared.

B. Verify conditioned power supply is available to control units and to operator workstation.

C. Verify field end devices, wiring, and pneumatic tubing is installed prior to installation proceeding.

D. If preparation is the responsibility of another installer, notify Architect of unsatisfactory preparation before proceeding.

3.2 INSTALLATION

A. Install in accordance with manufacturer's instructions. Install electrical material and installation in accordance with appropriate requirements of Division 16.

B. Wiring: Install conduit and electrical wiring in accordance with Section 16150.1. Power wiring required for controllers and control panels shall be dedicated properly

fused power circuits for the express use of the individual controller or control panel.2. Power wiring required for the NAC shall also be dedicated properly fused power

circuits for the express use of the NAC, and if available to an emergency power circuit.

3. Connect the Host PC Workstation to a power receptacle and if available within the room location, connect to an emergency power receptacle.

4. Install all line voltage wiring in EMT conduit.5. Install all low voltage wiring within EMT conduit, except when run in ceiling spaces.

Low voltage wiring installed in ceiling spaces must be plenum rated wiring in accordance with local codes. All wiring in ceiling spaces must be properly supported to the building so as not to droop. Install wiring as close to the deck as possible to avoid damage from other trades or materials.

6. Install all conduit and wiring in parallel lines to the building structure, corridors, and hallways.

7. Communication wiring shall be installed using shielded cable. The communication network wiring shall be clearly marked with a specific color code. Communication wiring shall not be installed near noise producing equipment, such as ballasts, magnetic starters, etc.

8. All analog inputs and analog outputs shall be wired using shielded cable.9. All digital outputs shall be wired using 18 gauge stranded wire.10. All wiring in mechanical rooms, walls shall be installed in EMT conduit. Concealed

conduit and wiring is required in all finished spaces.

C. DDC Equipment:1. All components shall be installed in protective enclosures. Wiring within the DDC

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enclosure shall be either number coded or color coded. Both the enclosure and the controller shall be properly grounded in accordance with manufacturer's recommendation. Documentation shall be firmly attached to the enclosure within a plastic envelope. Documentation shall state point-to-point termination detail, description of each individual point, location of power source for the controller, and ID number or address within the network.

2. All DDC Controllers shall be mounted on walls within equipment rooms, custodial closets, or electrical rooms. Only application-selectable controllers (ASCs) for VAV boxes, heat pumps, unit ventilators, rooftop units, or package units may be mounted on the equipment.

D. Host PC Workstation: Install PC and peripherals after the room location has been finished and cleaned to avoid damage by dust and debris. Install software in control units and in operator workstation. Implement features of programs to specified requirements and appropriate to sequence of operation.

E. Color Graphic Software:1. Provide graphic screens depicting the actual layout for all major equipment, as

required.2. Provide graphic representation of the building, including building floor plans. Provide

common information and status within these screens, such as zone temperature, equipment status, etc.

3. Coordinate with the Architect and the Owner prior to loading and testing.

F. Sensing Device Installation:1. Freezestats: Provide where indicated in the sequences on discharge side of the first

coil, downstream of the filter section. Serpentine the element across the face of the coil and fasten using support rods.

2. Space Sensors/Transmitters: Provide as required by the sequences and shown on the Drawings. Mount at 60 inches above finished floor. Wire to respective PUC or ASC to provide stand-alone control.

3. Duct Mounted Sensors/Transmitters: Provide as required by the sequences. Averaging type sensors shall be supplied for all mixed air and discharge air locations. Serpentine across the duct opening at even increments and provide proper fastening.

4. Liquid Immersion Sensor/Transmitter: Provide as required by the sequences. Coordinate the installation of all wells and sensor using thermal conductive compound. Strap on sensors are not acceptable, except for aquastats.

G. Controlled Devices:1. Dampers: Dampers shall be installed as specified in Section 15800, coordinate the

installation of linkage assembly. Dampers shall operate smoothly throughout their entire stroke.

2. Valves: Valves shall be installed as specified in Section 15100. Coordinate locations so that valves are piped properly and installed in an acceptable location. Valves shall provide proper shut-off as specified in this section.

3. Actuators: All actuators shall be provided as specified in Section 15905. Provide supply air as required. Where freezing conditions may occur, provide localized desiccant drying.

4. Pipe Access: Coordinate all thread-Olets specified in Section 15100.

3.3 MANUFACTURER'S FIELD SERVICES

A. Section 01400 - Quality Requirements: Manufacturers' field services.

B. Start and commission systems. Allow adequate time for start-up and commissioning prior to placing control systems in permanent operation.

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C. Furnish service technician employed by system installer to instruct Owner's representative in operation of systems plant and equipment for a 3 day period.

3.4 SYSTEM STARTUP AND COMMISSIONING

A. See Section 01700 - Facility Operation Requirements: Requirements for system commissioning, for additional provisions.

B. System Startup and Commissioning:1. Demonstrate that all points connected to the system operate fully in accordance with

this specification.2. Upon completion of installation, initially start-up and test all equipment being

controlled using a portable operator interface connected to individual controllers.a. Verify that all inputs are properly being read.b. Measure, calibrate, and adjust all analog inputs, including temperature sensors.c. Stroke all analog outputs from 0 to 100 percent and verify all linkage

adjustments are accurate.d. Verify valves and dampers fully close and provide tight shut-off with no leakage.e. Verify all digital outputs are properly energizing the controlled device.f. Adjust setpoints so equipment can run properly.

3. Verify from host computer that all of the controllers are being addressed from the host. Verify communication speed is acceptable and meets the requirements of this specification.

4. Verify all programs and software functions for proper sequence of operation as specified in Section 15940.

5. Coordinate work with air-balancing, ventilation, piping, and electrical work to provide complete system commissioning.

6. Provide a Commissioning Report detailing the dates, times, and person(s) performing the start-up. Include detail of when and who performed the individual processes specified above.

3.5 DEMONSTRATION AND TRAINING

A. Section 01700 - Execution Requirements: Requirements for demonstration and training.

B. Furnish basic operator training for 4 persons on data display, alarm and status descriptors, requesting data, execution commands and log requests. Include a minimum of 40 hours instructor time. Furnish training on site.

C. Demonstrate complete and operating system to Owner.

D. Training1. Initial training shall occur during system start-up and commissioning.2. Immediately after commissioning is complete as specified, the controls system

manufacturer shall provide a four hour, on-site session detailing the layout of the control system including network wiring routes, control panel locations, transformer locations, etc.

3. After completion of the on-site session the Operation and Maintenance manual shall be reviewed with the Owner and shall include but not be limited to:a. Fundamental operation of the system.b. Training on setpoint adjustment and scheduling modificationsc. Operation and sequencing of control loops for all mechanical equipment being

controlled4. Provide telephone support and answer questions throughout the warranty period.

3.6 PROTECTION

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A. Protect installed products until completion of project.

B. Touch-up, repair or replace damaged products before Substantial Completion.

3.7 SCHEDULES

A. Input/Output Schedule:

B. Point Description:PointPointPoint

C. Inputs

D. Temperature

E. Relative Humidity

F. Pressure

G. Flow

H. Level

I. Position

J. Energy

K. Power

L. Outputs

M. Status

N. Alarm

O. Pneumatic Position

P. Electronic Position

Q. Set Point Adjust

R. Start/Stop

S. Off/Low/High

T. Software Features

U. PID Control (DDC)

V. High Limit

W. Low Limit

X. Run Time Totals

Y. Consumption Totals

Z. Program Start/Stop

AA. Load Shed

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BB. Duty Cycle

CC. Enthalpy Switchover

DD. Optimal Run Time

EE. Supply Air Reset

FF. Outdoor Air Interlock

GG. Outdoor Air Temp. Reset

HH. Free Cooling Mode

II. Warm-up Mode

JJ. Boiler Interlock

KK. Chiller Sequencing

LL. Energy Calculation

MM. ALARM SCHEDULE

NN. TYPEDESCRIPTION

OO. A1High Limit

PP. A2Low Limit

QQ. A3Run Time

RR. A4Maintenance

SS. A5Status

TT. A6Override

UU. A7Freeze

VV. A8Low Pressure

END OF SECTION

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