attachment-6---project-manual-0.pdf

NHARNG SMR – BUILDING 1 ALTERATIONS July 16, 2026 DuBois & King, Inc. Section 23 0923 - Page 1

SECTION 23 0923

DIRECT-DIGITAL CONTROL SYSTEM FOR HVAC

PART 1 GENERAL

1.01 DESCRIPTION

The B1 JFHQ and B2 CST are connected buildings, each served by existing DDC controls.

1. B1 has a mix of controls platforms from a history of upgrades, from a heat pump system to a

VAV system. These multiple platforms will be updated by this project to, generally, convert all major HVAC equipment to new controllers and to a new communication network.

2. B1 has two existing building controllers (B-BC). Project intent is to replace these with a single

JACE building controller. All existing LAN network protocols shall be maintained to continue serving remaining equipment not scheduled to receive new equipment or terminal unit AAC or ASC controllers.

3. B2 has an existing controller. Project intent is to replace this controller with a new B-BC

(JACE) of the same specs as the B1 controller.

4. Front ends. Each building is currently served by their own workstations. Project intent is to set up the two new JACEs to communicate with a single workstation located in B1.

B1 existing DDC system has multiple communication protocols, with the main backbone a legacy

JCI Metasys N2 network.

1. The majority of the N2 network controllers shall be migrated to the new MS/TP network. The remaining N2 equipment controllers, located on all floors, shall be re-connected to maintain communication to the new Jace.

2. All other network protocols serving existing equipment shall be maintained fully functional.

B2 existing DDC system is a JCI BACnet MS/TP network protocol.

1. Certain mechanical equipment currently reporting to the B2 Network Engine (such as B1 chillers, boilers & pumps located in remote equipment shed) are to be migrated from the B2 comm network onto the B1 network.

2. Certain mechanical equipment reporting to the B2 Network Engine (such as pumps and HX’s located in the ground floor Mechanical room off the Drill Hall labelled Remote

Heating/Cooling plant) are to be migrated from the B2 comm network onto the B1 network.

3. All other equipment and devices serving B1 shall be migrated to the B1 network.

Facility Operation – The buildings are both occupied and shall remain occupied during the work.

All work and equipment outages shall be carefully coordinated and scheduled with the Owner to minimize the impact to occupants. Schedule work with a minimum of two weeks’ notice to Owner.

General Contractor shall provide all Mech (Div. 23) & Elect (Div. 26 & 28) scope items including direct-digital control system(s) as indicated on the project documents, point list, interoperability tables, drawings and as described in these specifications. Include a complete and working direct-digital control system. Include all engineering, programming, configuration/setup hardware and

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DuBois & King, Inc. Section 23 0923 - Page 2 software, controls and installation materials, installation labor, startup, training, final project documentation and warranty.

1. The direct-digital control system(s) shall consist of high-speed, peer-to-peer network of DDC controllers, a control system server, all configuration and setup software and hardware devices, and an Engineering Control Center (workstation). Provide a remote user using a standard HTML5 web browser to access the control system graphics and change adjustable setpoints with the proper password.

2. All new building controllers shall be native BACnet. All new BACnet workstations, controllers, devices and components shall be listed by BACnet Testing Laboratories. All new BACnet workstations, controllers, devices and components shall be accessible using a HTML5 Web browser interface. Browsers shall not require the use of an extension or add on software in order to access aforementioned workstations, controllers, devices, and components.

a. If used, gateways shall be BTL listed.

b. If used, gateways shall provide all object properties and read/write services shown on interoperability schedules.

3. The work administered by this Section of the technical specifications shall include all labor, materials, special tools, equipment, enclosures, power supplies, software, software licenses, Project specific software configurations and database entries, interfaces, wiring, tubing, installation, labeling, engineering, calibration, documentation, submittals, testing, verification, training services, permits and licenses, transportation, shipping, handling, administration, supervision, management, insurance, Warranty, specified services and any other items required for a complete and fully functional Controls System.

4. The control systems shall be designed such that each mechanical system shall operate under stand-alone mode. The contractor administered by this Section of the technical specifications shall provide controllers for each mechanical system. In the event of a network communication failure, or the loss of any other controller, the control system shall continue to operate independently. Failure of the ECC workstation shall have no effect on the field controllers, including those involved with global strategies.

5. The control system shall accommodate 1 Engineering Control Center(s) and the control system shall accommodate 5 web-based Users simultaneously, and the access to the system should be limited only by operator password and Owner-identified access requirements.

Some products are furnished but not installed by the contractor administered by this Section of the technical specifications. The contractor administered by this Section of the technical specifications shall formally coordinate in writing and receive from other contractors formal acknowledgements in writing prior to submission the installation of the products. These products include but are not limited to the following:

1. Control valves.

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2. Sensor wells and sockets in piping.

3. Terminal unit controllers.

Some products are not provided by, but are nevertheless integrated with the work executed by, the contractor administered by this Section of the technical specifications. These products include but are not limited to the following:

1. Fire alarm systems, duct smoke integration at a minimum. This interface shall require multiple existing relays, to be monitored.

2. Advanced utility metering systems. These systems may take information from the control system or its component meters and sensors.

3. Boiler and/or chiller controls. These controls, if not native BACnet, will require a BACnet

Gateway.

4. Terminal units’ velocity sensors

5. Unitary HVAC equipment (rooftop air conditioning units, split systems, packaged pumping stations) controls. These include:

a. Discharge temperature control.

b. Economizer control.

c. Flowrate control.

d. Setpoint reset.

e. Time of day indexing.

f. Status alarm.

6. Variable frequency drives. These controls, if not native BACnet, will require a BACnet

Gateway.

7. The following systems have limited control (as individually noted below) from the ECC:

a. Constant temperature rooms: temperature out of acceptable range and status alarms.

b. Emergency generators: status alarms.

c. Domestic water heating systems: low temperature, high temperature and status alarms.

d. Building lighting systems: on/off and scene control.

e. Sanitary sewage pumps: status alarm.

Responsibility Table:

Work/Item/System Furnish Install Low Voltage Wiring

Line Power

Control system low voltage and communication wiring

23 09 23 23 09 23 23 09 23 N/A

Terminal units 23 23 N/A 26

Controllers for terminal units 23 09 23 23 23 09 23 16

LAN conduits and raceway 23 09 23 23 09 23 N/A N/A

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Work/Item/System Furnish Install Low Voltage Wiring

Line Power

Automatic dampers (not furnished with equipment)

23 09 23 23 N/A N/A

Automatic damper actuators 23 09 23 23 09 23 23 09 23 23 09 23

Manual valves 23 23 N/A N/A

Automatic valves 23 09 23 23 23 09 23 23 09 23

Pipe insertion devices and taps, flow and pressure stations.

23 23 N/A N/A

Thermowells 23 09 23 23 N/A N/A

Current Switches 23 09 23 23 09 23 23 09 23 N/A

Control Relays 23 09 23 23 09 23 23 09 23 N/A

Power distribution system monitoring interfaces

23 09 23 23 09 23 23 09 23 26

Interface with chiller/boiler controls 23 09 23 23 09 23 23 09 23 26

Chiller/boiler controls interface with control system

23 23 23 09 23 26

All control system nodes, equipment, housings, enclosures and panels.

23 09 23 23 09 23 23 09 23 26

Smoke detectors 28 ( 28 28 28

Fire/Smoke Dampers 23 23 28 28

Smoke Dampers 23 23 28 28

Fire Dampers 23 23 N/A N/A

Chiller/starter interlock wiring N/A N/A 26 26

Chiller Flow Switches 23 23 23 N/A

Boiler interlock wiring 23 23 23 26

Boiler Flow Switches 23 23 23 N/A

Water treatment system 23 23 23 26

VFDs 23 26 23 09 23 26

Fume hood controls 23 09 23 23 09 23 23 09 23 26

Computer Room A/C Unit field-mounted controls

23 23 26 26

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Work/Item/System Furnish Install Low Voltage Wiring

Line Power

Control system interface with CRU A/C controls

23 09 23 23 09 23 23 09 23 26

CRU A/C unit controls interface with control system

23 23 09 23 23 09 23 26

Fire Alarm shutdown relay interlock wiring

28 28 28 26

Control system monitoring of fire alarm smoke control relay

28 28 23 09 23 28

Fan Coil Unit controls (not furnished with equipment)

23 09 23 23 09 23 23 09 23 26

Unit Heater controls (not furnished with equipment)

23 09 23 23 09 23 23 09 23 26

Packaged RTU space-mounted controls (not furnished with equipment)

23 09 23 23 09 23 23 09 23 26

Packaged RTU unit-mounted controls (not furnished with equipment)

23 09 23 23 09 23 23 09 23 26

Starters, HOA switches 23 23 N/A 26

This facility’s existing direct-digital control (DDC) system is manufactured by Johnson Controls /

Tridium, and its B-BC Building Controller (JACEs) are located in multiple locations between B1 &

2. The existing system utilizes multiple top-end protocols, including N2, LON, and FC Bus. The existing system’s workstations (ECC or B-OWS) and controllers were installed and updated over several years. The contractor administered by this Section of the technical specifications shall observe the capabilities, existing I/O points, graphics features, communication network, services, spare capacity of the existing control system and its ECC prior to beginning work.

1. Remove existing direct-digital control system ECC, communications network serving only new controllers with existing communications network to remain for controllers to remain, and specific equipment controllers as noted in project documents. Replace with new BACnet

ECC, network and controllers compliant with this Section of the technical specifications.

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Provide a programmable internetworking gateway allowing for real-time communication between the existing direct-digital control system and the new BACnet control system. Real-time communication shall provide all object properties and read/write services shown on interoperability schedules. The contractor administered by this Section of the technical specifications shall provide all necessary investigation and site-specific programming to execute the interoperability schedules.

a. The combined system shall operate and function as one complete system including one database of control point objects and global control logic capabilities. The upgraded ECC shall continue to communicate with the remaining direct-digital control system’s devices.

The upgraded ECC shall communicate directly with the new native-BACnet devices over the new and existing control system’s communications network. Facility operators shall have complete operations and control capability over all systems, new and existing including; monitoring, trending, graphing, scheduling, alarm management, global point sharing, global strategy deployment, graphical operations interface and custom reporting as specified.

Unitary standalone systems including Unit Heaters, Cabinet Unit Heaters, Fan Coil Units, Base

Board Heaters, thermal comfort ventilation fans, and similar units for control of room environment conditions may be equipped with integral controls furnished and installed by the equipment manufacturer or field mounted. Refer to equipment specifications and as indicated in project documents. Application of standalone unitary controls is limited to at least those systems wherein remote monitoring, alarm and startup are not necessary. Examples of such systems include:

1. Vestibule heater

2. Exterior stair heater

The direct-digital control system shall start and stop equipment, move (position) damper actuators and valve actuators, and vary speed of equipment to execute the mission of the control system.

Use electricity as the motive force for all damper and valve actuators.

1.02 RELATED WORK

Section 23 72 00, Air-to-Air Energy Recovery Equipment.

1.03 DEFINITION

Algorithm: A logical procedure for solving a recurrent mathematical problem; A prescribed set of well-defined rules or processes for the solution of a problem in a finite number of steps.

Analog: A continuously varying signal value (e.g., temperature, current, velocity etc.

BACnet: A Data Communication Protocol for Building Automation and Control Networks -as defined by ANSI/ASHRAE Standard 135. This communications protocol allows diverse building automation devices to communicate data and services over a network.

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BACnet/IP: Annex J of Standard 135. It defines and allows for using a reserved UDP socket to transmit BACnet messages over IP networks. A BACnet/IP network is a collection of one or more

IP sub-networks that share the same BACnet network number.

BACnet: Annex L of Standard 135. Defines standardized device profile list of controllers & devices. Includes B-BC, B-AAC, B-ASC, B-OWS, B-SA, B-SS among others.

BACnet Internetwork: Two or more BACnet networks connected with routers. The two networks may use different LAN technologies.

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

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

BACnet Broadcast Management Device (BBMD): A communications device which broadcasts

BACnet messages to all BACnet/IP devices and other BBMDs connected to the same BACnet/IP network.

BACnet Interoperability Building Blocks (BIBBs): BACnet Interoperability Building Blocks (BIBBs) are collections of one or more BACnet services. These are prescribed in terms of an "A" and a

"B" device. Both of these devices are nodes on a BACnet internetwork.

BACnet Testing Laboratories (BTL). The organization responsible for testing products for compliance with the BACnet standard, operated under the direction of BACnet International.

Baud: It is a signal change in a communication link. One signal change can represent one or more bits of information depending on type of transmission scheme. Simple peripheral communication is normally one bit per Baud. (e.g., Baud rate = 78,000 Baud/sec is 78,000 bits/sec, if one signal change = 1 bit).

Binary: A two-state system where a high signal level represents an "ON" condition and an "OFF" condition is represented by a low signal level.

BMP or bmp: Suffix, computerized image file, used after the period in a DOS-based computer file to show that the file is an image stored as a series of pixels.

Bus Topology: A network topology that physically interconnects workstations and network devices in parallel on a network segment.

Control Unit (CU): Generic term for any controlling unit, stand-alone, microprocessor based, digital controller residing on secondary LAN or Primary LAN, used for local controls or global controls

Deadband: A temperature range over which no heating or cooling is supplied, i.e., 22-25 degrees

C (72-77 degrees F), as opposed to a single point change over or overlap).

Device: a control system component that contains a BACnet Device Object and uses BACnet to communicate with other devices.

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Device Object: Every BACnet device requires one Device Object, whose properties represent the network visible properties of that device. Every Device Object requires a unique Object Identifier number on the BACnet internetwork. This number is often referred to as the device instance.

Device Profile: A specific group of services describing BACnet capabilities of a device, as defined in ASHRAE Standard 135, Annex L. Standard device profiles include BACnet Operator

Workstations (B-OWS), BACnet Building Controllers (B-BC), BACnet Advanced Application

Controllers (B-AAC), BACnet Application Specific Controllers (B-ASC), BACnet Smart Actuator

(B-SA), and BACnet Smart Sensor (B-SS). Each device used in new construction is required to have a PICS statement listing which service and BIBBs are supported by the device.

Diagnostic Program: A software test program, which is used to detect and report system or peripheral malfunctions and failures. Generally, this system is performed at the initial startup of the system.

Direct Digital Control (DDC): Microprocessor based control including Analog/Digital conversion and program logic. A control loop or subsystem in which digital and analog information is received and processed by a microprocessor, and digital control signals are generated based on control algorithms and transmitted to field devices in order to achieve a set of predefined conditions.

Distributed Control System: A system in which the processing of system data is decentralized and control decisions can and are made at the subsystem level. System operational programs and information are provided to the remote subsystems and status is reported back to the Engineering

Control Center. Upon the loss of communication with the Engineering Control center, the subsystems shall be capable of operating in a stand-alone mode using the last best available data.

Download: The electronic transfer of programs and data files from a central computer or operation workstation with secondary memory devices to remote computers in a network

(distributed) system.

DXF: An AutoCAD 2-D graphics file format. Many CAD systems import and export the DXF format for graphics interchange.

Electrical Control: A control circuit that operates on line or low voltage and uses a mechanical means, such as a temperature sensitive bimetal or bellows, to perform control functions, such as actuating a switch or positioning a potentiometer.

Electronic Control: A control circuit that operates on low voltage and uses a solid-state components to amplify input signals and perform control functions, such as operating a relay or providing an output signal to position an actuator.

Engineering Control Center (ECC): The centralized control point for the intelligent control network. The ECC comprises of personal computer and connected devices to form a single workstation.

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Ethernet: A trademark for a system for exchanging messages between computers on a local area network using coaxial, fiber optic, or twisted-pair cables.

Firmware: Firmware is software programmed into read only memory (ROM) chips. Software may not be changed without physically altering the chip.

Gateway: Communication hardware connecting two or more different protocols. It translates one protocol into equivalent concepts for the other protocol. In BACnet applications, a gateway has

BACnet on one side and non-BACnet (usually proprietary) protocols on the other side.

GIF: Abbreviation of Graphic interchange format.

Graphic Program (GP): Program used to produce images of air handler systems, fans, chillers, pumps, and building spaces. These images can be animated and/or color-coded to indicate operation of the equipment.

Graphic Sequence of Operation: It is a graphical representation of the sequence of operation, showing all inputs and output logical blocks.

I/O Unit: The section of a digital control system through which information is received and transmitted. I/O refers to analog input (AI, digital input (DI), analog output (AO) and digital output

(DO). Analog signals are continuous and represent temperature, pressure, flow rate etc., whereas digital signals convert electronic signals to digital pulses (values), represent motor status, filter status, on-off equipment etc.

JPEG: A standardized image compression mechanism stands for Joint Photographic Experts

Group, the original name of the committee that wrote the standard.

Local Area Network (LAN): A communication bus that interconnects operator workstation and digital controllers for peer-to-peer communications, sharing resources and exchanging information.

Network Repeater: A device that receives data packet from one network and rebroadcasts to another network. No routing information is added to the protocol.

MS/TP: Master-slave/token-passing (ISO/IEC 8802, Part 3). It uses twisted-pair wiring for relatively low speed and low cost communication.

Native BACnet Device: A device that uses BACnet as its primary method of communication with other BACnet devices without intermediary gateways. A system that uses native BACnet devices at all levels is a native BACnet system.

Network Number: A site-specific number assigned to each network segment to identify for routing. This network number must be unique throughout the BACnet internetwork.

Object: The concept of organizing BACnet information into standard components with various associated properties. Examples include analog input objects and binary output objects.

Object Identifier: An object property used to identify the object, including object type and instance.

Object Identifiers must be unique within a device.

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Object Properties: Attributes of an object. Examples include present value and high limit properties of an analog input object. Properties are defined in ASHRAE 135; some are optional and some are required. Objects are controlled by reading from and writing to object properties.

Operating system (OS): Software, which controls the execution of computer application programs.

Peripheral: Different components that make the control system function as one unit. Peripherals include monitor and I/O unit.

Peer-to-Peer: A networking architecture that treats all controllers as equal partners- any device can initiate and respond to communication with other devices.

PICS: Protocol Implementation Conformance Statement, describing the BACnet capabilities of a device. All BACnet devices have published PICS.

PID: Proportional, integral, and derivative control, used to control modulating equipment to maintain a setpoint.

Repeater: A network component that connects two or more physical segments at the physical layer.

Router: a component that joins together two or more networks using different LAN technologies.

Examples include joining a BACnet Ethernet LAN to a BACnet MS/TP LAN.

Sensors: devices measuring state points or flows, which are then transmitted back to the DDC system.

Thermostats: devices measuring temperatures, which are used in control of standalone or unitary systems and equipment not attached to the DDC system.

1.04 QUALITY ASSURANCE

Criteria:

1. Single Source Responsibility of subcontractor: Either the DDC Contractor or the System

Integrator shall obtain hardware and software supplied under this Section and delegate the responsibility to a single source controls installation subcontractor. The Integration subcontractor shall be responsible for the complete design, installation, integration, and commissioning of the system. The controls subcontractor shall be in the business of design, installation and service of such building automation control systems similar in size and complexity.

2. Equipment and Materials: Equipment and materials shall be cataloged products of manufacturers regularly engaged in production and installation of HVAC control systems.

Products shall be manufacturer’s latest standard design and have been tested and proven in actual use.

3. The controls subcontractor shall provide a list of no less than five similar projects which have building control systems as specified in this Section. These projects must be on-line and

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4. The controls subcontractor shall have an in-place facility within the continental US, spare parts inventory for the next five (5) years, and necessary test and diagnostic equipment to support the control systems.

5. The controls subcontractor shall have minimum of three years of experience in design and installation of building automation systems similar in performance to those specified in this

Section. Provide evidence of experience by submitting resumes of the project manager, the local branch manager, project engineer, the application engineering staff, and the electronic technicians who would be involved with the supervision, the engineering, and the installation of the control systems. Training and experience of these personnel shall not be less than three years. Failure to disclose this information will be a ground for disqualification of the supplier.

6. Provide a competent and experienced Project Manager employed by the Controls Contractor.

The Project Manager shall be supported as necessary by other Contractor employees in order to provide professional engineering, technical and management service for the work.

The Project Manager shall attend scheduled Project Meetings as required and shall be empowered to make technical, scheduling and related decisions on behalf of the Controls

Contractor.

Codes and Standards:

1. All work shall conform to the applicable Codes and Standards.

2. Electronic equipment shall conform to the requirements of FCC Regulation, Part 15, Governing Radio Frequency Electromagnetic Interference, and be so labeled.

1.05 PERFORMANCE

The system shall conform to the following: Where performance is listed in two or more places, the more stringent requirement shall apply.

1. Graphic Display: The system shall display up to four (4) graphics on a single screen with a minimum of twenty (20) dynamic points per graphic. All current data shall be displayed within ten (10) seconds of the request.

2. Graphic Refresh: The system shall update all dynamic points with current data within five (5) seconds. Data refresh shall be automatic, without operator intervention.

3. Object Command: The maximum time between the command of a binary object by the operator and the reaction by the device shall be two (2) seconds. Analog objects shall start to adjust within two (2) seconds.

4. Object Scan: All changes of state and change of analog values shall be transmitted over the high-speed network such that any data used or displayed at a controller or work-station will be current, within the prior six (6) seconds.

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5. Alarm Response Time: The maximum time from when an object goes into alarm to when it is annunciated at the workstation shall not exceed ten (10) seconds.

6. Program Execution Frequency: Custom and standard applications shall be capable of running as often as once every five (5) seconds. The Contractor shall be responsible for selecting execution times consistent with the mechanical process under control.

7. Multiple Alarm Annunciations: All workstations on the network shall receive alarms within five

(5) seconds of each other.

8. Performance: Programmable Controllers shall be able to execute DDC PID control loops at a selectable frequency from at least once every one (1) second. The controller shall scan and update the process value and output generated by this calculation at this same frequency.

9. Reporting Accuracy: Listed below are minimum acceptable reporting end-to-end accuracies for all values reported by the specified system:

Measured Variable Reported Accuracy

Space temperature ±0.5 degrees C (±1 degrees F)

Ducted air temperature ±0.5 degrees C [±1 degrees F]

Outdoor air temperature ±1.0 degrees C [±2 degrees F]

Dew Point ±1.5 degrees C [±3 degrees F]

Water temperature ±0.5 degrees C [±1 degrees F]

Relative humidity ±2 percent RH

Water flow ±1 percent of reading

Air flow (terminal) ±5 percent of reading

Air flow (measuring stations) ±5 percent of reading

Carbon Monoxide (CO) ±5 percent of reading

Carbon Dioxide (CO2) ±50 ppm

Air pressure (ducts) ±25 Pa [±0.1 inch wg]

Air pressure (space) ±0.3 Pa [±0.001 inch wg]

Water pressure ±2 percent of full scale *Note 1

Electrical Power ±0.5 percent of reading Note 1: for both absolute and differential pressure

10. Control stability and accuracy: Control sequences shall maintain measured variable at setpoint within the following tolerances:

Controlled Variable Control Accuracy Range of Medium

Air Pressure ±50 Pa (±0.2 inch wg) 0–1.5 kPa (0–6 inch wg)

Air Pressure ±3 Pa (±0.01 inch wg) -25 to 25 Pa (-0.1 to 0.1 inch wg)

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Controlled Variable Control Accuracy Range of Medium

Airflow ±5 percent of full scale

Space Temperature ±1.0ºC (±2.0 degrees F)

Duct Temperature ±1.5ºC (±3 degrees F)

Humidity ±4 percent RH

Fluid Pressure ±10 kPa (±1.5 psig) 0–1 MPa (1–150 psig)

Fluid Pressure ±250 Pa (±1.0 inch wg) 0–12.5 kPa (0–50 inch wg) differential

11. Extent of direct digital control: control design shall allow for at least the points indicated on the points lists on the drawings.

1.06 WARRANTY

Labor and materials for control systems shall be warranted for a minimum period of one (1) year.

Existing control system failures during the warranty period shall be adjusted, repaired, or replaced at no cost or reduction in service to the owner. The system includes all computer equipment, transmission equipment, and all sensors and control devices.

The Controls supplier shall have on-call technical support coverage to include normal business hours, after business hours, weekends, & holidays to dispatch qualified personnel to the job site to provide timely resolution of issues. On-line remote connectivity is not available nor acceptable.

Response shall be within two (2) hours of initial problem reporting. The Controls supplier shall then dispatch qualified personnel to the job site to resolve the problem within 24 hours after the problem is reported.

Controls subcontractor shall be responsible for temporary operations and maintenance of the control systems during the construction period until final commissioning, training of facility operators and acceptance of the project by NHARNG. All equipment outages to be coordinated with Owner and arranged to impact only specific occupant “units” per the Owner.

Warranty Period Support – Provide on-going project support throughout the warranty period.

Include up to forty (40) hours of on-site EMS issues resolution, including Owner comment incorporation, programming, graphics, field modifications or other services as required by the

Owner to update or rectify the controls system.

1.07 SUBMITTALS

Submit shop drawings in accordance with Division 1.

Information and material submitted under this section shall be marked “SUBMITTED UNDER

SECTION 23 09 23, DIRECT-DIGITAL CONTROL SYSTEM FOR HVAC”, with applicable paragraph identification.

Manufacturer’s Literature and Data Including:

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1. A wiring diagram for each type of input device and output device including DDC controllers, modems, repeaters, etc. Diagram shall show how the device is wired and powered, showing typical connections at the digital controllers and each power supply, as well as the device itself. Show for all field connected devices, including but not limited to, control relays, motor starters, electric or electronic actuators, and temperature pressure, flow and humidity sensors and transmitters.

2. A diagram of each terminal strip, including digital controller terminal strips, terminal strip location, termination numbers and the associated point names.

3. Control dampers and control valves schedule, including the size and pressure drop.

4. Control air-supply components, and computations for sizing compressors, receivers and main air-piping, if pneumatic controls are furnished.

5. Catalog cut sheets of all equipment used. This includes, but is not limited to, software (by manufacturer and by third parties), DDC controllers, panels, peripherals, airflow measuring stations and associated components, and auxiliary control devices such as sensors, actuators, and control dampers. When manufacturer’s cut sheets apply to a product series rather than a specific product, the data specifically applicable to the project shall be highlighted. Each submitted piece of literature and drawings should clearly reference the specification and/or drawings that it supposed to represent.

6. An evaluation of equipment performance at design conditions to prove equipment meets code requirements, listing code and year of compliance.

7. Sequence of operations for each system and the associated control diagrams. Equipment and control labels shall correspond to those shown on the drawings.

8. Color prints of proposed graphics with a list of points for display.

9. Furnish a BACnet Protocol Implementation Conformance Statement (PICS) for each BACnet-compliant device.

10. Schematic wiring diagrams for all control, communication and power wiring. Provide a schematic drawing of the central system installation. Label all cables and ports with computer manufacturers’ model numbers and functions. Show all interface wiring to the control system.

11. An instrumentation list for each controlled system. Each element of the controlled system shall be listed in table format. The table shall show element name, type of device, manufacturer, model number, and product data sheet number.

12. Riser diagrams of wiring between central control unit (CCU) and all control panels.

13. Plan drawings showing routing of LAN and locations of control panels, controllers, routers, gateways, ECC, and larger controlled devices.

14. Construction details for all installed conduit, cabling, raceway, cabinets, and similar.

Construction details of all penetrations and their protection.

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15. Quantities of submitted items may be reviewed but it is the responsibility of the contractor administered by this Section of the technical specifications to provide sufficient quantities for a complete and working system.

Product Certificates: Compliance with Article, QUALITY ASSURANCE.

Validation Test Plan: Along with manufacturer’s literature, product certificates, wiring and functional diagrams, and sequence of operations, submit for review and approval a Validation

Test Plan which is specific to the work of this project and which references the specific controls component nomenclatures found in the control contractor’s wiring and functional diagrams and the specific sequences of controls for this project and which describes how the contractor will implement the controls system validation and demonstration as specified in paragraph 3.2

SYSTEM VALIDATION AND DEMONSTRATION found in this section.

Licenses: Provide licenses for all software residing on and used by the Controls Systems, ECC, and portable OWS and transfer these licenses to the Owner prior to completion.

As Built Control Drawings:

1. Furnish one (1) electronic copy of as-built drawings for each control system. The documents shall be submitted for approval prior to final completion.

2. Furnish one (1) set of applicable control system prints for each mechanical system for wall mounting. The documents shall be submitted for approval prior to final completion.

3. Furnish one (1) flash drive to include all CAD DWG and/or .DXF format for the drawings noted in subparagraphs above and all programing and features to Owner with DDC system name label.

Operation and Maintenance (O/M) Manuals):

1. Submit in accordance with requirements in Specification Division 1.

2. Include the following documentation:

a. General description and specifications for all components, including logging on/off, alarm handling, producing trend reports, overriding computer control, and changing set points and other variables.

b. Detailed illustrations of all the control systems specified for ease of maintenance and repair/replacement procedures, and complete calibration procedures.

c. One copy of the final version of all software provided including operating systems, programming language, operator workstation software, and graphics software. Copy shall be provided on flash drive to Owner.

d. Complete troubleshooting procedures and guidelines for all systems.

e. Complete operating instructions for all systems.

f. Recommended preventive maintenance procedures for all system components including a schedule of tasks for inspection, cleaning and calibration. Provide a list of recommended spare parts needed to minimize downtime.

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g. Training Manuals: Submit the course outline and training material to the Owner for approval three (3) weeks prior to the training to NHARNG facility personnel. These persons will be responsible for maintaining and the operation of the control systems, including programming. The Owner reserves the right to modify any or all of the course outline and training material.

h. Licenses, guaranty, and other pertaining documents for all equipment and systems.

Submit Performance Report to Owner prior to final inspection.

1.08 INSTRUCTIONS

Instructions to Owner operations personnel: Perform in accordance with requirements in

Specification Division 1, and as noted below. Contractor shall also video tape instruction sessions noted below.

1. Training shall comprise of on-the-job training during startup, checkout period, and performance test period. NHARNG facilities personnel will work with the Contractor’s installation and test personnel on a daily basis during startup and checkout period. During the performance test period, controls subcontractor will provide 4 hours of instructions, given in multiple training sessions (each no longer than two hours in length), to the NHARNG facilities personnel.

2. The O/M Manuals shall contain approved submittals as outlined in Article 1.7, SUBMITTALS.

The Controls subcontractor will review the manual contents with Owner facilities personnel during second phase of training.

3. Training shall be given by direct employees of THE CONTROLS system subcontractor.

1.09 PROJECT CONDITIONS (ENVIRONMENTAL CONDITIONS OF OPERATION)

The ECC and peripheral devices and system support equipment shall be designed to operate in ambient condition of 32 to 120 degrees F at a relative humidity of 20 to 95 percent non-condensing.

The Controllers used outdoors shall be mounted in NEMA 4 waterproof enclosures and shall be rated for operation at –40 to 65 degrees C (-40 to 150 degrees F). Indoor mounted controllers shall be the default mounting location, with outdoor mounting only where absolutely necessary.

All electronic equipment shall operate properly with power fluctuations of plus 10 percent to minus

15 percent of nominal supply voltage.

Sensors and controlling devices shall be designed to operate in the environment which they are sensing or controlling.

1.10 APPLICABLE PUBLICATIONS

The publications listed below form a part of this specification to the extent referenced. The publications are referenced in the text by the basic designation only. Where conflicts occur these specifications and the VHA standards will govern.

American National Standards Institute, Telecommunications Industry Association (ANSI/TIA):

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568.2-D……………………………BACnet A Data Communication Protocol for Building Automation and Control Networks

American Society of Heating, Refrigerating, and Air-Conditioning Engineers (ASHRAE):

135-2024 .................................... BACnet A Data Communication Protocol for Building Automation and Control Networks

147-2019 .................................... Reducing the Release of Halogenated Refrigerants from

Refrigerating and Air-Conditioning Equipment and Systems

Federal Communication Commission (FCC):

Rules and Regulations Title 47 Chapter 1-2014 Part 15: Radio Frequency Devices

Institute of Electrical and Electronic Engineers (IEEE):

802.3-2022 ................................. Standard for Ethernet

National Fire Protection Association (NFPA):

70-2026 ...................................... National Electric Code

PART 2 PRODUCTS

2.01 MATERIALS

Use new products that the manufacturer is currently manufacturing and that have been installed in a minimum of 25 installations. Spare parts shall be available for at least ten years after completion of this contract.

2.02 CONTROLS SYSTEM ARCHITECTURE

General

1. The Controls Systems shall consist of multiple Nodes and associated equipment connected by industry standard digital and communication network arrangements.

2. The ECC, building controllers and principal communications network equipment shall be standard products of recognized major manufacturers available through normal PC and computer vendor channels – not "Clones" assembled by a third-party subcontractor.

3. The networks shall, at minimum, comprise, as necessary, the following:

a. A fixed ECC and a portable operator’s terminal.

b. Network computer processing, data storage and BACnet-compliant communication equipment including workstations and digital data processors.

c. BACnet-compliant routers, bridges, switches, hubs, modems, gateways, interfaces and similar communication equipment.

d. Active processing BACnet-compliant building controllers connected to other BACnet-compliant controllers together with their power supplies and associated equipment.

e. Addressable elements, sensors, transducers and end devices.

f. Third-party equipment interfaces and gateways as described and required by the

Contract Documents.

g. Other components required for a complete and working Control Systems as specified.

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The Specifications for the individual elements and component subsystems shall be minimum requirements and shall be augmented as necessary by the Contractor to achieve both compliance with all applicable codes, standards, and to meet all requirements of the Contract

Documents.

Network Architecture

1. The Controls communication network shall utilize BACnet communications protocol operating over cable Ethernet connection, and MS/TP. Ethernet connection shall operate at a minimum speed of 100 Mb/sec.

2. The networks shall utilize only copper and optical fiber communication media as appropriate and shall comply with applicable codes, ordinances and regulations.

3. Data drops (single port) shall be provided by the Contractor. The NHARNG (Owner) will provide the IP address and related data to establish communication.

4. All necessary telephone and Internet Service Provider services and connections will be provided by the Owner (NHARNG).

Third Party Interfaces:

1. The contractor administered by this Section of the technical specifications shall include necessary hardware, equipment, software and programming to allow data communications between the controls systems and building systems supplied by other trades.

2. Other manufacturers and contractors supplying other associated systems and equipment shall provide their necessary hardware, software and startup at their cost and shall cooperate fully with the contractor administered by this Section of the technical specifications in a timely manner and at their cost to ensure complete functional integration.

Workstation (ECC or OWS):

1. The ECC shall not store any control system programming; all EMS programming shall be stored in the B-BC building controllers (JACEs), with ECC storage intended to store trending information, alarm history, and transaction logs.

2. Equip the ECC with the same software tool set that is located in the BACnet building controllers for system configuration and custom logic definition and color graphic configuration.

3. Access to all information on the ECC shall be through the same browser functionality used to access individual nodes. When logged onto the ECC the operator will be able to also interact with any other controller on the control system as required for the functional operation of the controls systems. The contractor administered by this Section of the technical specifications shall provide all components necessary for the ECC.

4. The ECC shall be utilized for controls systems application configuration, for archiving, reporting and trending of data, for operator transaction archiving and reporting, for network

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5. The ECC shall utilize IT industry standard database platforms which utilize a database declarative language designed for managing data in relational database management systems (RDBMS) such as SQL.

2.03 COMMUNICATION

Control products, communication media, connectors, repeaters, hubs, and routers shall comprise a BACnet internetwork. Controller and operator interface communication shall conform to

ANSI/ASHRAE Standard 135, BACnet.

1. The Data link / physical layer protocol between the ECC and all B-BC’s (for communication) acceptable to the Owner throughout its facilities is Ethernet (ISO 8802-3) and BACnet-

MS/TP.

Each controller shall have a communication port for connection to an operator interface.

Internetwork operator interface and value passing shall be transparent to internetwork architecture.

1. An operator interface connected to a controller shall allow the operator to interface with each internetwork controller as if directly connected. Controller information such as data, status, reports, system software, and custom programs shall be viewable and editable from each internet controller.

2. Inputs, outputs, and control variables used to integrate control strategies across multiple controllers shall be readable by each controller on the internetwork. Program and test all cross-controller links required to execute specified control system operation. An authorized operator shall be able to edit cross-controller links by typing a standard object address.

System shall be expandable to at least twice the required input and output objects with additional controllers, associated devices, and wiring. Expansion shall not require operator interface hardware additions or software revisions.

ECCs and Controllers with real-time clocks shall use the BACnet Time Synchronization service.

The system shall automatically synchronize system clocks daily from an operator-designated device via the internetwork. The system shall automatically adjust for daylight savings and standard time as applicable.

2.04 ENGINEERING CONTROL CENTER (ECC)

The ECC shall reside on a high-speed network with controllers as shown on system drawings.

The ECC and each standard browser connected to server shall be able to access all system information.

ECC and controllers shall communicate using BACnet protocol. ECC and control network backbone shall communicate using ISO 8802-3 (Ethernet) Data Link/Physical layer protocol and

BACnet/IP addressing as specified in ASHRAE/ANSI 135, BACnet Annex J.

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Hardware: ECC shall conform to the BACnet Advanced Workstation (B-AWS) Profile and shall be

BTL-Listed as a B-AWS device.

1. ECC shall be based on commercially available server grade hardware. Computers based on desktop architectures shall not be permitted. ECC shall not be equipped with remote management capabilities.

2. Processor(s):

a. Processors shall be either Intel Xeon or AMD EPYC chips sets designed specifically for workstation use. Desktop processors will not be allowed.

b. Minimum core count shall be 16 cores. Each Core shall be capable of executing 2 threads simultaneously.

c. Minimum base clock speed shall be 3.0 GHz.

3. Memory:

a. Engineering Control Center shall be equipped with a minimum of 32G of DDR4 Error

Correcting Code (ECC) memory. After installation of required 32G of RAM, the motherboard must still have a minimum of 2 DIMM slots open for expansion.

Motherboard shall be capable of minimum of 64GB of ECC memory.

b. Minimum speed shall be 2133MHz for memory.

4. Storage:

a. ECC shall be equipped with a storage drive with a minimum capacity of either 2 TB, or sufficient storage to log trending data of all system I/O points at a sampling period of 15 seconds for 365 days, whichever is larger. Provide storage via an internal solid-state drive (SSD).

5. Case:

a. Real-time clock:

1) Accuracy: Plus or minus 1 minute per month.

2) Time Keeping Format: 24-hour time format including seconds, minutes, hours, date, day, and month; automatic reset by software.

3) Clock shall function for one year without power.

4) Provide automatic time correction once every 24 hours by synchronizing clock with the Time Service Department of the U.S. Naval Observatory.

b. Serial ports: Four USB ports and two RS-232-F serial ports for general use, with additional ports as required. Data transmission rates shall be selectable under program control.

c. Parallel port: Enhanced.

d. Sound card: For playback and recording of digital WAV sound files associated with audible warning and alarm functions.

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e. Color monitor: PC compatible, not less than 27 inches, LCD type, with a minimum resolution of 2560 by 1440 pixels, non-interlaced, and a maximum dot pitch of 0.28 mm.

f. Keyboard: Minimum of 64 characters, standard ASCII…