A0005_Attch A_DDC System for HVAC specification 230923_CAVHS Edit.pdf

03-01-23

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SECTION 23 09 23

DIRECT-DIGITAL CONTROL SYSTEM FOR HVAC

PART 1 - GENERAL

1.1 DESCRIPTION

General Contractor shall provide 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 software, controls and installation materials, installation labor, commissioning and startup, training, final project documentation and warranty. A System Integrator and Direct Digital

Controls Contractor shall be two separate direct subcontractors of General

Contractor.

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. Provide for a remote user using a standard HTML 5 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 VA-approved 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, 23 09 23 - 2 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 A/E shall designate what each “mechanical systems” is composed of. 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 shall have no effect on the field controllers, including those involved with global strategies.

5. The control system shall accommodate 2 Engineering Control Center(s) and the control system shall accommodate 20 web-based Users simultaneously, and the access to the system should be limited only by operator password.

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.

2. Flow switches.

3. Flow meters.

4. Sensor wells and sockets in piping.

5. Terminal unit controllers.

Some products are installed but not furnished 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 procurement of the products. These products may include but are not limited to the following:

1. Refrigerant leak detection system.

2. Factory-furnished accessory thermostats and sensors furnished with unitary equipment.

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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 may include but are not limited to the following:

1. Fire alarm systems. If zoned fire alarm is required by the project-specific requirements, this interface shall require multiple relays, which are provided and installed by the fire alarm system contractor, 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. Condenser water quality systems: condenser water high- and low-parts hydrogen (pH) alarms.

6. 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.

7. Steam trap monitoring system: Monitoring and alarms shall be connected to the ECC via BACnet.

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

9. 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. Process and food service coolers, refrigerators and freezers: in patient nutrition kitchens, blood banks, mortuaries, and pharmacies: high temperature, trending and status alarms.

c. Medical gas systems (if not bottled at point of use): low pressure and status alarms.

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d. Medical and dental vacuum systems: high pressure and status alarms.

e. Medical and dental compressed air systems: low pressure and status alarms.

f. Emergency generators: status alarms.

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

h. Pneumatic tube systems: status alarms.

i. Elevators: status alarms.

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

k. Process conveyors: on/off control.

l. Stormwater removal pumps: status alarm.

m. Sanitary sewage pumps: status alarm.

n. Fume hoods and biological safety cabinets: status alarms

o. Isolation rooms: pressure outside of acceptable limit alarms.

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

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

23 09 23 - 5

Work/Item/System Furnish Install Low

Voltage

Wiring

Line

Power

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 31 00 28 31 00 28 31 00 28 31 00

Fire/Smoke Dampers 23 23 28 31 00 28 31 00

Smoke Dampers 23 23 28 31 00 28 31 00

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

Refrigerant monitors 23 23 09 23 23 09 23 26

Laboratory Environmental

Controls

23 09 23 23 09 23 23 09 23 26

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

Medical gas panels 23 23 26 26

Laboratory Air Valves 23 23 23 09 23 N/A

Computer Room A/C Unit field-mounted controls

23 23 26 26

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

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Work/Item/System Furnish Install Low

Voltage

Wiring

Line

Power

Fire-fighter’s smoke control station (FSCS

28 28 28 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

Cooling Tower Vibration

Switches

23 23 23 09 23 23 09 23

Cooling Tower Level Control

Devices

23 23 23 09 23 23 09 23

Cooling Tower makeup water control devices

23 23 23 09 23 23 09 23

Starters, HOA switches 23 23 N/A 26

Steam Trap Monitoring in

Boiler Plant

23 21 11 23 21 11 26 26

Steam Trap Monitoring not in Boiler Plant

23 22 13 23 22 13 26 26

This facility’s existing direct-digital control (DDC) system is manufactured by Trane, and its ECCs are located at JLM in Little Rock and

Building 80 in North Little Rock. The existing system’s top-end communications is via VA OIT network. The existing system’s ECC and controllers were installed in the year of 2024. The contractor administered by this Section of the technical specifications shall observe the capabilities, communication network, services, spare capacity of the existing control system and its ECC prior to bidding project.

1. As indicated on Project Plans, remove existing direct-digital control system ECC, communications network and controllers. Replace with new BACnet ECC, network and controllers compliant with this

Section of the technical specifications.

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2. As indicated on Project Plans, provide a new BACnet ECC, communications network, and controllers. If required, 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 VA-approved 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. 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.

3. As indicated on Project Plans, upgrade the existing direct-digital control system’s ECC to include all properties and services required by an ASHRAE Standard 135 BACnet B-AWS Profile. The upgraded ECC shall continue to communicate with the existing direct-digital control system’s devices. The upgraded ECC shall communicate directly with the new native-BACnet devices over the existing control system’s communications network without the use of a gateway. Provide programming converting the existing non-BACnet devices, objects and services to ASHRAE Standard 135 BACnet-complaint BIBBs. 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 performance requirement for the combined system: the combined system shall operate and function as one complete system including one database of control point objects and global control logic capabilities. Facility operators shall have complete operations and control capability over all systems, new

23 09 23 - 8 and existing including; monitoring, trending, graphing, scheduling, alarm management, global point sharing, global strategy deployment, graphical operations interface and custom reporting as specified.

This campus has standardized on an existing standard ASHRAE Standard

135, BACnet/IP Control System supported by a preselected controls service company. This entity is referred to as the “Control System Integrator” in this Section of the technical specifications. The Control system integrator is responsible for ECC system graphics and expansion. It also prescribes control system-specific commissioning/ verification procedures to the contractor administered by this Section of the technical specification. It lastly provides limited assistance to the contractor administered by this

Section of the technical specification in its commissioning/verification work.

1. The General Contractor of this project shall directly hire the

Control System Integrator in a contract separate from the contract procuring the controls contractor administered by this Section of the technical specifications.

2. The contractor administered by this Section of the technical specifications shall coordinate all work with the Control System

Integrator. The contractor administered by this Section of the technical specifications shall integrate the ASHRAE Standard 135, BACnet/IP control network(s) with the Control System Integrator’s B-

AWS through an Ethernet connection provided by either the Control

System Integrator or VA.

3. The contractor administered by this Section of the technical specifications shall provide a peer-to-peer networked, stand-alone, distributed control system. All control devices utilized must be preapproved by the national VA OIT and the local CAVHS OIT to be able to reside on the OIT network. This direct digital control (DDC) system at least shall include one portable operator terminal -laptop, one digital display unit, microprocessor-based controllers, instrumentation, end control devices, wiring, piping, software, and related systems. This contractor is responsible for all device mounting and wiring.

4. Responsibility Table:

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Item/Task Section

23 09 23 contactor

Control system integrator

VA

ECC expansion X

ECC programming X

Devices, controllers, control panels and equipment

X

Point addressing: all hardware and software points including setpoint, calculated point, data point(analog/ binary), and reset schedule point

X

Point mapping X

Network Programming X

ECC Graphics X

Controller programming and sequences X

Integrity of LAN communications X

Electrical wiring X

Operator system training X

LAN connections to devices X

LAN connections to ECC X

IP addresses X

Overall system verification (Cx) X

Controller and system verification X

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. Light-switch-operated toilet exhaust

2. Vestibule heater

3. Exterior stair heater

4. Attic heating and ventilation

5. Mechanical or electrical room heating and ventilation.

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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, unless use of pneumatics as motive force is specifically granted in writing by the VA.

1.2 RELATED WORK

Section 01 81 13, SUSTAINABLE CONSTRUCTION REQUIREMENTS.

Section 13 21 29, Constant Temperature Rooms.

Section 23 09 11, Instrumentation and Control for Boiler Plant.

Section 23 21 13, Hydronic Piping.

Section 23 22 13, Steam and Condensate Heating Piping.

Section 23 31 00, HVAC Ducts and Casings.

Section 23 36 00, Air Terminal Units.

Section 23 38 13, Commercial-Kitchen Hoods.

Section 23 52 33, Water-Tube Boilers.

Section 23 52 39, Fire-Tube Boilers.

Section 23 64 00, Packaged Water Chillers.

Section 23 73 00, Indoor Central-Station Air-Handling Units.

Section 23 74 13, Packaged, Outdoor, Central-Station Air-Handling

Units.

Section 23 81 00, Decentralized Unitary HVAC Equipment.

Section 23 81 23, Computer-Room Air-Conditioners.

Section 23 81 43, Air-Source Unitary Heat Pumps.

Section 23 81 46, Water-Source Unitary Heat Pumps.

Section 23 84 00, Humidity Control Equipment.

Section 25 10 10, Advanced Utility Metering System.

Section 26 05 11, Requirements for Electrical Installations.

Section 26 05 21, Low-Voltage Electrical Power Conductors and Cables

(600 Volts and Below).

Section 26 05 26, Grounding and Bonding for Electrical Systems.

Section 26 05 33, Raceway and Boxes for Electrical Systems.

Section 26 09 23, Lighting Controls.

Section 26 22 21, Specialty Transformers.

Section 26 27 26, Wiring Devices.

Section 26 29 11, Motor Starters.

Section 26 32 13, Engine Generators.

Section 27 15 00, Communications Horizontal Cabling

Section 28 31 00, Fire Detection and Alarm.

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1.3 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.

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 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.

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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 (72-78 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.

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.

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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.

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., 23 09 23 - 14 whereas digital signals convert electronic signals to digital pulses

(values), represent motor status, filter status, on-off equipment etc.

I/P: a method for conveying and routing packets of information over LAN paths. User Datagram Protocol (UDP) conveys information to “sockets” without confirmation of receipt. Transmission Control Protocol (TCP) establishes

"sessions", which have end-to-end confirmation and guaranteed sequence of delivery.

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.

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.

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PCX: File type for an image file. When photographs are scanned onto a personal computer they can be saved as PCX files and viewed or changed by a special application program as Photo Shop.

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

Peer-to-Peer: A networking architecture that treats all network stations 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.

1.4 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.

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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 functional such that the Department of Veterans Affairs (VA) representative could observe the control systems in full operation.

4. The controls subcontractor shall have an in-place facility within 50 miles with technical staff, 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.

1.5 PERFORMANCE

The system shall conform to the following:

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.

23 09 23 - 17

2. Graphic Refresh: The system shall update all dynamic points with current data within eight (8) 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.

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

(10) seconds.

6. Program Execution Frequency: Custom and standard applications shall be capable of running as often as once every (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) ±10 percent of reading

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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)

Airflow ±10 percent of full scale

Space Temperature ±1.0ºC (±2.0 degrees F)

Duct Temperature ±1.5ºC (±3 degrees F)

Humidity ±5 percent RH MRI, SPS, PHARMACY

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.

1.6 WARRANTY

Labor and materials for control systems shall be warranted for a period as specified under Warranty in FAR clause 52.246-21.

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 on-line support service shall allow the Controls supplier to dial out over telephone lines to or connect via (through password-limited access)

VPN through the internet to monitor and control the facility’s building automation system. This remote connection to the facility shall be within two

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(2) hours of the time that the problem is reported. This coverage shall include normal business hours, after business hours, weekend and holidays. If the problem cannot be resolved with on-line support services, the Controls supplier shall dispatch the qualified personnel to the job site to resolve the problem within 8 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 VA. If a multi-phase project, above requirements are applicable for each phase.

1.7 SUBMITTALS

Submit shop drawings in accordance with Section 01 33 23, SHOP

DRAWINGS, PRODUCT DATA, AND SAMPLES.

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:

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

23 09 23 - 20 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. Sequence of operations for each system and the associated control diagrams. Equipment and control labels shall correspond to those shown on the drawings.

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

8. Furnish a BACnet Protocol Implementation Conformance Statement

(PICS) for each BACnet-compliant device.

9. 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.

10. 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.

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

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

13. Construction details for all installed conduit, cabling, raceway, cabinets, and similar. Construction details of all penetrations and their protection.

14. 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

23 09 23 - 21 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 three (3) copies 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) CD-ROM in CAD DWG and/or .DXF format for the drawings noted in subparagraphs above.

Operation and Maintenance (O/M) Manuals):

1. Submit in accordance with Article, INSTRUCTIONS, in Specification

Section 01 00 00, GENERAL REQUIREMENTS.

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.

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 VA 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 COR prior to final inspection.

SPEC WRITER NOTE: Discuss with COR a possibility of allowing the Contractor to video tape the instructions for future use, and edit the following paragraph accordingly.

1.8 INSTRUCTIONS

Instructions to VA operations personnel: Perform in accordance with

Article, INSTRUCTIONS, in Specification Section 01 00 00, GENERAL

REQUIREMENTS, and as noted below. Contractor shall also video tape instruction sessions noted below.

1. First Phase: Formal instructions to the VA facilities personnel for a total of 48 hours, given in multiple training sessions (each no longer than four hours in length), conducted sometime between the completed installation and prior to the performance test period of the control system, at a time mutually agreeable to the Contractor and the VA.

2. Second Phase: This phase of training shall comprise of on the job training during startup, checkout period, and performance test period. VA 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 48 hours of instructions, given in multiple training sessions (each no longer than four hours in length), to the VA facilities personnel.

3. The O/M Manuals shall contain approved submittals as outlined in

Article 1.7, SUBMITTALS. The Controls subcontractor will review the manual contents with VA facilities personnel during second phase of training.

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

5. Training shall be provided for beginner and advanced users for any new Building Automation System (BAS) system. Training shall include beginner and advanced programming classes, advanced graphics classes, and advanced networking class for any new BAS system.

a. Training shall include instruction on any new controls that includes hardware and software or field devices and front end

(BAS). Training shall include everything needed to allow BAS technicians to install, program, and connect to the network.

6. Training shall include a basic overview class of any new BAS system on navigation and command points on a graphic of the BAS system.

Target audience for this basic overview class are HVAC shop technicians and personnel.

4.7. Training shall be included for any new VFD installed. Training shall include startup and programming of new VFD installed.

1.9 PROJECT CONDITIONS (ENVIRONMENTAL CONDITIONS OF OPERATION)

The ECC and peripheral devices and system support equipment shall be designed to operate in ambient condition of 20 to 35 degrees C (65 to 90 degrees F) at a relative humidity of 20 to 80 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).

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 Society of Heating, Refrigerating, and Air-Conditioning

Engineers (ASHRAE):

135-2020................BACnet A Data Communication Protocol for

Building Automation and Control Networks

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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):

802.3-2018..............Standard for Ethernet

National Fire Protection Association (NFPA):

70-2020.................National Electric Code

PART 2 - PRODUCTS

2.1 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 five years after completion of this contract.

2.2 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 Servers 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.

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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.

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 a standard Ethernet LAN and 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. All controls devices utilized must be preapproved by the national VA

OIT and local CAVHS OIT to reside on the OIT network.

4. All necessary telephone lines, ISDN lines and internet Service

Provider services and connections will be provided by the VA.

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.

Servers:

1. Provide data storage server(s) to archive historical data including trends, alarm and event histories and transaction logs.

2. Equip these server(s) 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 data storage server(s) shall be through the same browser functionality used to access individual

23 09 23 - 26 nodes. When logged onto a server 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 necessary digital processor programmable data storage server(s).

4. These server(s) shall be utilized for controls systems application configuration, for archiving, reporting and trending of data, for operator transaction archiving and reporting, for network information management, for alarm annunciation, for operator interface tasks, for controls application management and similar.

5.