Section 15010, Mechanical Provisions (1) Related Documents

B. Include a minimum of thirty-two (32) hours additional programming for changes as directed during the warranty period.

C. The DDC/DCS Contractor shall provide for guaranteed maximum on premises response time of eight (8) hours for major system failures (emergency service) and 24 hours for minor repairs (routine service) during the warranty period. Provide spare parts stock at no cost to Owner to allow immediate repair of components subject, to multiple or repetitive failures.

D. Preventive Maintenance: During the warranty period, the DDC/DCS Contractor shall provide all maintenance at no additional charge. This shall include all part, labor, and related expenses for correction of the deficiency or breakdown and for routine preventative maintenance of control system equipment and devices.

(6) System Service and Acceptance

A. Submittals:

1. Shop Drawings shall be submitted in accordance Section 01300, and shall consist of a complete list of equipment and materials, including manufacturer’s descriptive and technical literature, control sequences of operation, catalog cuts, and installation instructions. Shop drawings shall also contain complete wiring and wiring routing, routing, schematic diagrams, tag number of devices, software descriptions, calculations, and any other details required to demonstrate that the system will function properly. Drawings shall show proposed floor plan layout and installation of all equipment and the relationship to other parts of the work, including DDC/DCS panel physically layout and schematics.

All drawings shall be reviewed after the final system checkout and updated or corrected to provide “as-built” drawings to show exact installation. The exact locations of all control devices and equipment shall be shown. They system will not be considered complete until the “as-built” drawings have received their final approval. The DDC Contractor shall deliver three (3) sets of “as-built” drawings.

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  Description of all points.
  
• 
  Listing of binary and analog hardware required to interface the DDC to equipment for each DDC function.
  
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  Listing of all analog alarm limits.
  
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  Listing of all DDC application programs associated with each piece of equipment.
  
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  Failure modes for control functions to be performed in case of DDC failure.
  

1. Reference manuals for the system shall include information which falls into four general categories; System Description, Control Logic, Operation and Maintenance. Project specific manuals shall include detailed information describing the installation.

C. Reference Materials:

1. System reference material shall be contain as a minimum, an overview of the system, its organization, the concepts of networking and central site/field hardware relationships. It shall include detailed information on:

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  Hardware- cutsheets and product descriptions
  
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  Engineering- design requirements for initial installations and/or additions to existing systems.
  
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  Installation – mounting and connection details for filed hardware, accessories and central site equipment.
  
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  Field hardware setup, checkout and tuning techniques.
  
• 
  Central site setup, software loading and checkout techniques.
  
• 
  A listing of basic terminology, standard alarms and messages, error messages and frequently used commands.
  

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  Diagrams and listing showing maximum input/output point configurations for controlled equipment.
  
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  A description of the control elements and sequences available for the equipment.
  
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  A listing of the information which is displayed to the operator for each piece of controlled equipment.
  
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  A listing of alarm and message conditions which may be detected for each piece of controlled equipment and the standard alarm and message texts which can be displayed when those conditions exist.
  
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  Copies of graphic screens showing the equipment operating parameters and status graphics with definitions for each item displayed.
  

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  Activating the central site.
  
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  Central site screen menus and their definitions.
  
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  Establishing set points and schedules.
  
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  Uploading and downloading software, set points, schedules, operating parameters and status between the central site and filed hardware.
  
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  Collecting trend data and generating trend plots.
  
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  Enabling alarms and messages.
  
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  Report generation.
  
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  Backing up software and date files.
  
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  Using the central site with “third party” software.
  

4. Maintenance reference material shall contain as a minimum section detailing.

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  Electrical and air supply considerations.
  
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  Grounding and lighting protection.
  
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  Hardware switch settings.
  
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  Field calibration of sensors.
  
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  Use of indicator lights and diagnostic software for system tuning and troubleshooting.
  
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  A list of troubleshooting symptoms with suggested corrective actions.
  
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  A list of error messages, their definitions and suggested corrective action.
  
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  The DDC/DCS Contractor shall supply five (5) properly indexed copies of all reference material in three-ring hard cover bindings.
  

A. Project specific materials shall contain as a minimum, the following:

1. Complete point identification, including terminal number, symbol, engineering units, and control program reference number.

2. Field information, including location, device type and function, electrical parameters, and installations drawing number.

3. The location and identification of DDC control hardware.

4. Complete identification application software for each piece of controlled equipment, including sequences of operation.

5. An installed hard disk copy of all system software upon successful completion of the acceptance test.

6. The DDC/DCS Contractor shall supply five (5) properly indexed copies of all project specific manuals in three-ring hard cover bindings.

(8) Acceptance Test and Acceptance

A. Upon completion of the DDC/DCS installation, the DDC/DCS Contractor shall start up the system and perform all necessary calibration, testing, and debugging operations. The DDC/DCS Contractor shall provide all calibration documentation, including indication of compliance with set points defined in the I/O Summary Tables. An acceptance test shall be performed by the DDC/DCS Contractor in the presence of the Mechanical Commissioning Authority and/or PSD No. 1.

B. The DDC/DCS Contractor shall submit an acceptance testing plan for the entire DDC/DCS system sixty (60) days prior to the acceptance test. The plan shall include a detailed written test procedure, a representative set of field data forms for each type of test, and an outline of the certified test report that will be presented. The following test shall be performed by the DDC/DCS Contractor:

1. The following two-part tests shall be scheduled after completion of equipment installation.

a. The first part includes an operational test of all field equipment and transmission media. Perform detailed cross check of each sensor by making a comparison between reading at the sensor and a standard test instrument. Note all results and deviations for review. Perform cross check of each control point by making a comparison between control command at the DDC controllers or field input/output devices. Verify that all systems are operable in specified failure mode upon control module or network failure, or loss of power. Verify that all systems return to control module control automatically upon resumption of operation or return of power. All materials and equipment shall have passed the calibration and operational tests before commencing the performance test.

b. The second part includes performance testing. These tests shall validate the functionality of all DDC control loops and scheduled control sequences. During the test period, all possible control sequences shall be exercised either by normal control operation or forced operation as required. Log and submit all results. When the system performance is deemed satisfactory, the system parts will be accepted for beneficial use and placed under warranty.

c. Provide temporary use of standard I/O devices for use during Acceptance testing such as printers and operator terminals as required.

(9) Owner’s Instructions

A. The DDC/DCS Contractor shall provide the services of competent instructors to provide full instructions to three persons in the operation, maintenance, and programming of the DDC system. The training shall be specifically oriented to the system and interfacing equipment installed. The training shall be provided in two phase. A minimum of eight (8) hours after system completion and a total of eight (8) additional hours during the warranty period to be scheduled at the Owner’s discretion.

B. The DDC/DCS contractor shall provide the services the competent instructors to provide full instructions, training facilities, and educational and training materials for one Pasco School District staff. The training shall occur off site at a “DDC/DCS contractor run school” for a minimum of 5 days in the operation, maintenance, troubleshooting, and programming of the DDC/DCS system. The training shall be specifically oriented to the control system, control routines and equipment installed. Pasco School District will provide transportation and logging for the district staff. The DDC/DCS contractor will provide all training services and shall be solely responsible for all other costs associated with this training.

C. On-site Operator Training:

1. The DDC/DCS Contractor shall provide all training materials required to instruct all operator personnel on:

a. System Overview

b. Operator commands

c. Emergency operation

d. Report generation

2. Programmer Training:

The DDC/DCS Contractor shall provide all training materials required to instruct all programmer personnel on:

a. Database entry.

b. Trend logs, reports, and point summaries.

c. Alarm limits.

d. Application programs.

e. System commands.

3. Maintenance Training:

The DDC/DCS Contractor shall provide all instructional materials required to instruct all maintenance personnel on:

a. General operation of the central system and field equipment

b. Diagnostics

c. Failure recovery procedures

d. Operations and use of DDC test equipment

e. Alarm formats

f. Maintenance and Calibration of DDC

g. Troubleshooting and repair instructions.

(10) Spare Parts

A. The DDC Contractor shall submit a complete list of recommended spare parts for use in keeping downtime to a minimum. The spare parts list shall be accompanied with a price list. Spare parts and prices shall be consistent with the system components and requirements. Provide spare parts stock for Owner at no additional cost during warranty period.

(11) Location

A. Locate DDC system local control component cabinets as directed by PSD

No. 1 in the building..

(12) DDC/DCS System Description- General

A. This specification defines the requirements for a distributed Direct Digital Control (DDC) system interface with a PC based Local Site and handling both analog and binary inputs/outputs on a “stand-alone” basis. The objective of this control concept is to provide a control system with a maximum level of flexibility and reliability by distributing control requirements over a network of small microprocessor-based control modules. The DDC/DCS system shall include all required network communication interface modules to act as a gateway between building controllers and the DDC/DCS system. Operations personnel shall be able to access the DDC/DCS system vial existing lap-top computer and software. Any additional costs for software/hardware to accomplish this shall be the contractors. New software must be compatible with existing software and hardware.

B. It is also desired that the system performs enhanced control operations to minimize energy consumption within comfort conditions, including part or all of the following integral software programs. All programs shall be executed automatically without the need for operator intervention and shall be flexible enough to allow user customization.

1. Time-of-day scheduling.

2. Calendar-based scheduling.

3. Holiday scheduling

4. Temporary schedule overrides

5. Start-Stop Time Optimization

6. Automatic Daylight Savings Time Switchover

7. Night setback control

8. Enthalpy switchover (economizer)

9. Trend capabilities

10. Demand Limiting

C. The DDC/DCS system shall be designed and installed with a minimum of 50% spare network capacity for future expendability without the need for additional central software or hardware.

D. The DDC/DCS shall have power-fail protection of all setpoints and control routines, and 100% stand-alone operation capability.

(13) Global Controllers

A. Global Controllers shall be stand-alone, programmable, microprocessor-based. They shall be multi-tasking, multi-user, real-time digital control processors consisting of modular hardware with plug-in enclosed processors, communication controllers and power supplies. Controller size shall be sufficient to fully meet the requirements of this specification.

B. Each Global Controller shall have sufficient memory to support its operating system and databases, including:

1. Control processes

2. Energy management applications: Occupancy pre-purge, multilevel occupancy schedulings, duty cycling, optimum start/stop, economizer control, and intelligent recovery.

3. Alarm management applications, including custom alarm messages.

4. Historical/trend data

5. Maintenance support applications

6. Custom processes: Automatic and adaptive tuning of PID loops.

7. Operator I/O.

8. Network communications.

9. Manual override monitoring, start-up and troubleshooting.

C. Global Controllers shall provide at least two RS-232C serial data communications port for operation of operator I/O devices such as industry standard printers, operator terminals, modems and portable laptop operator’s terminals. DDC Controllers shall allow temporary use of portable devices without interrupting the normal operation of permanently connected network, printers or terminals

D. Each Global Controller shall continuously perform self-diagnostics, communication diagnosis and diagnosis of all panel components. The Global Controller shall provide both local and remote annunciation of any detected component failures, low battery conditions or repeated failure to establish communication.

E. Alarm management shall be provided to monitor and direct alarm information to operator devices. Each Global Controller shall perform distributed, independent alarm analysis and filtering to minimize operator interruptions due to non-critical alarms, minimize network traffic and prevent alarms from being lost. At no time shall the Global Controller’s ability to report alarms be affected by either operator or activity at a PC work station, local I/O device or communications with other panels on the network.

F A variety of historical data collection utilities shall be provided to manually or automatically samples, store and display system data for points. Each Global Controller shall have a dedicated RAM-based buffer for trend data. Trend data shall be stored at the Global Controllers and uploaded to the work station when retrieval is desired. Uploads shall occur based upon either user-defined interval, manual command or when the trend buffers are full.

G. Global controller shall have capability to page three operations personnel in case of alarm.

(14) Application Specific Controllers

A. Provide Application Specific Controllers (ASC) as required to control the HVAC equipment. Each ASC shall be a microprocessor-based direct digital control unit and shall be capable of operating either as a standalone controller or on a communications network originating at the Global Controller. Provide each ASC with sufficient memory to operate in a truly independent manner; that is, each ASC shall support its own inputs and outputs, operating systems, database and programs necessary to perform control sequences and energy management routines. Application specific Controllers shall include all point inputs and outputs necessary to perform the specified control sequences.
Each ASC shall be accessible for the purpose of control and monitoring from a central or remote operator’s terminal as specified herein.

B. Each ASC shall be Underwriters Laboratories listed under UL 916 PAZX.

C. Each ASC shall support monitoring and control of the following types of points required by the operational sequence.

1. Analog inputs : 4-20 mA

0-10 Vdc

RTDs
2. Analog outputs: 0-10 Vdc

4-20 mA
3. Digital inputs: Dry contact closure

Pulse Accumulator

Voltage Sensing
4. Digital outputs: Contact closure (motor starters, size 1-4)

(15) General Application Controllers (GAC)

A. Provide General Applications Controllers (GAC) as required for equipment not controlled by Application Specific Controllers (ASC). GAC shall include all point inputs and outputs necessary to perform the control sequences. Provide hand-off automatic switches where specifically noted. Switches shall be mounted either within the controller’s key-accessed enclosure or externally mounted with each switch keyed to prevent unauthorized overrides.

B. All databases and programs shall be stored in non-volatile EEPROM, flash RAM, or a battery back-up shall be provided. All programs shall be field-customized to meet the user’s exact control strategy requirements.

C. Local alarming and trending capabilities shall be provided for convenient troubleshooting and system diagnostics. Alarm limits and trend data information shall be user-definable for any point.

D. Each GAC shall have connection provisions for a portable lap-top or similar programmer’s service tool. This tool shall allow the user to display, generator or modify all point databases and operating programs. All new values and problems shall then be restored to EEPROM or flash RAM.

E. Each GAC shall be Underwriters Laboratories listed under UL 916 PAZX.

F. Each GAC shall support monitoring and control of the following types of points required by the operational sequence.

1. Analog inputs : 4-20 mA

0-10 Vdc

4-20 mA
3. Digital inputs: Dry contact closure

Pulse Accumulator

Voltage Sensing

(16) Remote Interface Via LAN and Onsite Connectivity

A. LAN: Remote access to the local control system shall be provided. System shall be provided with all devices and software necessary for remote monitoring and operation via Owner’s local area network (LAN) both locally and from remoter operations building. Contractor shall establish and verify operation of Owner’s interface. Software access shall not require any changes or modifications to the control system devices. See Paragraph 3.1.A.1.

(17) Remote Terminal (Server) Software

A. Provide personal computer-based software that shall provide, as a minimum, the following functionality, as required.

1. Graphical viewing and control of environment: based on floor plans of the facility showing all controlled equipment and control points.

2. Scheduling and override of building operations.

3. Energy management.

4. Collection and analysis of historical data.

5. Definition and construction of dynamic color graphics.

6. Editing programming, storage and downloading of controller databases.

7. Web control

B. Provide a graphical user interface through which system operations may be performed using a mouse or similar pointing device. The interface shall allow for all system operations and applications to be quickly and easily selected using the mouse in conjunction with groups of drop-down menus, lists, graphics, and icons. Provide functionality such that all operations can also be performed using the keyboard as a backup interface device. Provide additional capability that allows at least ten (10) special function keys to perform often-used operations.

C. System operator shall be able to enter either Microsoft Word or Excel software on-line without having to exit the graphical interface package through Microsoft Windows menu selection.

D. The software shall provide a multi-tasking environment that allows the user to run several applications simultaneously. The mouse shall be used to quickly select and switch between multiple applications. This shall be accomplished through the use of Microsoft Windows 2000 Professional, XP Professional (verify with PSD No. 1, will change) supporting concurrent viewing and controlling of systems operations. Provide functionality such that any of the following may be performed simultaneously, and in any combination, via user-sized windows.

1. Dynamic color graphics and graphic control.

2. Alarm reporting and acknowledging.

3. Time-of-day scheduling.

4. Trend data definition and presentation.

5. Graphic definition.

6. Graphic construction.

E. Graphic displays shall be high-resolution, multi-colored presentations of actual building data and parameters. Graphic displays may be quickly and easily viewed via any or all of the following methods as a minimum.

1. Graphic links.

2. Drop-down menus

3. Special function keys.

4. Points in alarm.

F. Point values such as temperature, humidity and flow, and point status such as on/off, normal and alarm shall automatically and continually update to indicate current operating conditions.

G. As a minimum, symbols, text and colors shall be dynamic in nature.

H. As part of this project, provide the capability to control any I/O point from a dynamic graphic display. Include a commandable dynamic graphic with customized background graphic for each mechanical system to be monitored and/or controlled per the project plans and sequence of operation.

I. All values shall be displayed in both texts and symbolic form, such as an analog bar, gauge or other standard measurement device. Setpoint values shall be changed by simply moving a pointer to the desired setting on the measurement device.

J. Provide alarm annunciation capabilities, such that alarm status shall be displayed automatically on the screen regardless of system operation or application modes. The quantity of current alarms shall be displayed via a flashing icon or similar symbol. In addition, provide an audible signal to indicate the occurrence of new alarms.

K. Provide a drop-down menus type format for simplification of time-of-day scheduling and overrides of building operations. Provide the following spreadsheet graphic types as a minimum.

1. Weekly schedules

2. Zone schedules

3. Monthly calendars

L Monthly calendars for a 24-month period shall be provided which allow for simplified scheduling of holidays and special days in advance. Holidays and special days shall be user selected with the pointing device and shall automatically reschedule equipment operation as previously defined on the weekly schedules.

M. Provide trending capabilities that allow the user to easily monitor and preserve records of system activity over an extended period of time. Any and/or all system points may be trended automatically a time-based intervals and/or changes of value, both of which shall be user-definable. Trend data may be stored on hard disk for future diagnostics and reporting.

N. Trend data report graphics shall be provided to allow the user to view all trended point data.

O. Provide a general purpose graphics package which allows the user to quickly and easily define or construct color graphics displays. In addition, provide a library of standard HVAC equipment and symbols such as air handling units, chillers, cooling towers and boilers and standard electrical symbols that shall aid the user in definition of standard or custom graphics.

P. Energy use profiles in formats such as a bar chart graphics.

Q. Provide the capability to backup and store all system databases on the PC hard disk. In addition, all database changes may be performed while the PC is on-line without disrupting other system operations. Changes shall be automatically recorded and downloaded to the appropriate DDC Controller. Similarly, changes made at the DDC Controller can be automatically uploaded to the PC, ensuring system continuity. The user shall also have the option to selectively download changes as desired.

R. Multiple use security levels shall be provided to allow for various degrees of system access and control. Provide a minimum of four levels of access, with each increasing level allowing control of additional system operations and applications. The system shall automatically generate a report of log on/log off time and system activity for each user. Provide automatic log-off capability to prevent unauthorized system use.

S. Complete power failure protection and automatic system restart. Provide power surge and overcurrent protection for electronic control devices.

(18) Field-installed Sensors and Control Devices

A. General

1. Provide field-installed sensors and control devices as required for a complete system installation. Except as otherwise indicated, provide manufacturer’s standard control system components as indicated by published product information, designed and constructed as recommended by manufacturer.

B. Temperature Sensors:

1. All temperature sensors shall be solid-state electronic, employing a resistance type output (RTD). Duct sensors shall be rigid or flexible probe with sensor element length suitable for complete duct coverage. All sensors shall have a minimum accuracy of plus or minus 0.5 degrees F.

2. An override switch shall initiate override of the night setback or unoccupied mode to normal operation when activated. The switch function may be locked out, canceled or limited as to time or temperature in software.

3. Sensors located in corridors, auditoriums, cafeterias, gymnasiums and common areas shall be blank stainless steel wall type with override button.

4. Office, classroom, and conference room sensors shall have local setpoint adjustment by occupants and occupancy override button. Range of load setpoint adjustment shall be programmed at DDC system.

5. Some temperature control zones have more than one temperature sensor. The temperature sensors shall be polled to control to the room/space furthest from setpoint.

6. Temperature sensor locations may be relocated during the control submittal approval phase at no additional cost to the Owner.

C. Control Damper and Valve Actuators:

1. Provide proportional or floating type electric actuators of sufficient size and reserve power (minimum 150% of maximum load) to operate control dampers and valves matched to application as described in the Sequence of Operation. Where multiple valves or dampers are sequenced together, provide true analog control or provide positive position feedback on floating actuators. Upon loss of power, actuators shall operate in a fail-safe manner as indicated to be normally open or normally closed, or as required for freeze protection utilizing spring return or capacitors. Actuators shall be designed and listed to operate in the application environment. All control actuators shall be furnished by an ISO 9000 manufacturing facility. Actuators for equipment specified in other sections shall be furnished in this section unless noted otherwise. Actuators shall Belimo, or approved equal.

D. Control valves:

1. Provide factory-fabricated electrical three-way mixing globe/plug style control valves or two-way globe/plug control valves as scheduled with equal percentage characteristics of the body material and pressure class for service application required. Valve body pressure rating shall be 125 psig minimum. Provide valves which mate and match material of connecting piping. Size control valves which mate and match material of connecting piping. Size control valves for a maximum full flow pressure drop of 4 psi for water service. Ball type and heat-activated type control valves are not acceptable. All control valves shall be furnished by an ISO 9000 manufacturing facility. Coordinate with Mechanical Contractor and HVAC equipment suppliers as necessary to provide complete fully functioning equipment integrated and compatible with this control system. Provide under this section all control components, devices, and accessories not provided with HVAC equipment.

E. Low Mixed Air/Temperature Detection Sensor

1. Provide mixed air/low-temperature protection sensor with sensing elements 20 feet long in length. Sensor shall be designed to operate in response to coldest one (1) foot length of sensing element, regardless of other parts of element.

F Provide water flow switches of bellows-actuated mercury or snap-acting type, with appropriate scale range and differential adjustment, with stainless steel or bronze wheel. For chilled water applications, provide vapor-proof type. Electronic flow switches not acceptable.

G. Current Sensing Relays:

1. Provide current sensing relays for hardware status of fans or pumps where remote mounting of device is desirable. Provide current sensing relays where air pressure differential is not adequate to operate a differential pressure switch. Current sensing relays shall have an integral LED indicating equipment status and field adjustable current setpoint range.

H. Control Relays:

1. Provide general purpose control relays sized for the application. Where the relay and the DDC Controller are not located in a the same room or area, provide integral LEDs for indication of control signal status.

I. IAQ Sensors:

1. Provide in each Air Handling Unit main return air, duct mounted VOC and/or C02 sensors, as required. VOC sensor shall provide 0-10v DC signal to control system. Control system shall modulate outside air damper to maintain indoor air quality based upon the sensor furthest from setpoint, or one sensor as selected by the operator. Sensor shall be G-Controls AQS, CO2 sensor shall be an AIRTEST TR9221-RL, or an approved equal.

(19) Local Operators Terminal

A. Provide personal computer local operators terminal (client) with all DDC software and computer operating software required for fully functional operation.

B. Local Operator’s Terminal shall have as a minimum (Verify with PSD No. 1, will change).
Processor: 2.5GHz INTEL PIV ™

Motherboard: VIA KT-133 (Socket A)

Memory: 128MB PC100 SDRAM (1 DIMM)

Floppy Drive: 3.5” 1.44 Floppy Drive

Hard Drive: 40GB Ultra ATA-66 Hard Drive (7200RPM)

Video Card: TNT2 Model 64 32 MB SDRAM AGP /w TV out

Monitor: 17” (15.7” VA) .25dp Color Monitor

DVD/CDR Combo: DVD-ROM/CD-Rewritable Drive

Sound: Advanced 3D wavetable Audio

Speakers: Altec Lansing ACS21 speakers

Modem: V.90 Standard 56K Fax Modem

Case: ATX Tower Case

Keyboard & Mouse: Microsoft Natural Keyboard Elite and Microsoft IntelliMouse ™

Operating System: Microsoft Windows XP Professional (verify)

Software: Microsoft Office 2002

Warranty: 2 year parts and labor warranty

Network Adapter: 10/100 PCI Ethernet Adapter

Uninterruptible power supply APC Back-up Pro with 650VA, and surge protector

(20) Hardware Installation

A. Remote (Server) Interface Connections:

1. The DDC/DCS system shall also provide for remote interface via a LAN line (digital). Provide separate devices that connect to the Owner’s digital network.

B. Control devices:

1. Controller enclosures, electrical junction boxes, shall be sized and located per NEC requirements. Special attentions hall be given to NEC Section 110-16 concerning working clearances.

2. Controller enclosures shall be listed by an independent testing laboratory for its intended use and have hinged, locking doors.

3. Controllers serving multiple pieces of equipment shall be located within the same room or general area as the equipment it serves.

4. Install systems and materials in accordance with manufacturer’s details and instructions and details on the drawings.

5. Provide nameplates beneath each control device mounted on the panel face with name and description of device function. Provide laminated plastic nameplates in coordinated contrasting colors.

6. Tag all control devices with coordinated high contrast adhesive labels to match control shop drawings.

C. Electrical Wiring Products:

1. Provide electric components, devices, raceway, wing, and wring connections required for the installation of the Direct Digital Temperature control system. Comply with requirements of local codes and ordinances, National Electrical Code, and Division 16.

2. Control wiring shall not be exposed in any areas. Control wiring shall be routed in conduit, no exceptions.

D. Power Circuit Wiring (110 V or Greater):

1. Dedicated power circuits adequate for all operating conditions shall be provided for each Global Controller and General Application Controller, field locate spare circuits or spaces in electrical panels and install circuits as required. Extend power as required.

E. Control Wiring:

1. Control and signal circuits shall be #18 AWG stranded minimum and shall be sized for less than 2% voltage drop over its longest installed length. Control wiring shall not be placed near power wiring.

F. Miscellaneous:

1. The Mechanical Contractor shall

a. Install immersion wells, pressure tappings, and any associated shut-off cocks.

b. Install all in-line devices, such as flow meters, flow switches, and control valves.

c. Provide all line voltage contactors for control of single phase motors where not furnished as a part of packaged equipment.

G. The DDC/DCS Contractor shall:

1. Terminate all devices furnished and installed under this contract as per the manufacturer’s recommendations, subject to the requirements of local codes and these specifications.

(21) Sequence of Operation (general) (specific requirements to be determined)

A. General

1. All HVAC and controlled equipment, system schedules, operating parameter values, and setpoint values shall be clearly displayed and labeled by the graphics interface and maintenance staff adjustable at operators remoter terminal (located at central maintenance building), including but not limited to (as applicable): schedule mode, room temperature, mixed air temperature, discharge temperature, outside air damper position, return air damper position, relief damper position, fan status, filter status, control valve(s) position, IAQ output scaled from 0-100% air pollution, exhaust fan status, relief fan status, hot deck temperature, cold deck temperature, return air temperature, building chilled water supply and return temperatures, hot water heating supply and return temperatures, alarms, pump status, heat exchanger, equipment reset temperatures, current sensors, flow switches and heating/cooling equipment failure alarms on self contained roof top units.

2. Provide on-site interface ports for via laptop computer, provide all necessary programming and software on existing Owner’s laptop computers.

3. Simultaneous heating and cooling of supply air is prohibited.

4. Verify occupied and unoccupied temperature setpoints with PSD No. 1.

(22) Hydronic Heating System

A. General: Gas-fired hot water boilers.

B. System Controls and Start/Stop

1. General: The building hot water boilers shall operate with its controls. See Section 15550 for boiler specifications and data, furnished by others. Coordinate with the boiler control panel supplier.

2. Hot heating water pumps (as required) (coordinate with Boiler Management System). The DDC/DCS system shall start heating hot water pumps and prove flow with either a flow switch or Hawkeye electronic command relay prior to enabling the remote boiler control panel. Pump operation shall be averaged for run time and number of starts. When freezing conditions are detected at any AHU, a hot water heating pump shall be started and the boilers enabled, setpoint per the reset schedule.

3. The DDC/DCS system shall: 1-provide a signal to enable the boiler control system, 2-supply a boiler water temperature setpoint signal 0-10VDC scaled to 100 deg F to 140 deg F. Boiler water temperature reset schedule shall be adjustable, initial schedule is as follows:

OAT Boiler Water Temperature

Above 60 deg F Boiler off

60 deg F 100 deg F

50 deg F 110 deg F

40 deg F 120 deg F

30 deg F 130 deg F

20 deg F 140 deg F

4. If any space temperature is 4 deg F below heating setpoint and the heating control valve is in the full flow (or full flow through) position (an in the case of multi-zone units the respective zone damper is also in the full heating position), an alarm shall be annunciated at the remote operators control panel and the boiler water temperature shall be raised to the next higher setpoint, and so on, until space setpoint is satisfied.

5. The DDC systems hall display at the local remote operators control panel the following.

- System supply water temp (2-10VDC)

- System return water temp (2-10VDC)

- Boiler return water temps. (2-10VDC)

- Boiler run status (one per boiler)

- Boiler failure signal (one per boiler)

- General system alarm B1, B2 and so forth and other system parameters.

6. The DDC/DCS system contractor shall be responsible for wiring of all boiler system components shall provide all field wiring and raceway and additional control devices, as required.

(23) Chilled Water Systems Operation

A. General: Building cooling is provided by an air-cooled chiller or chillers.

B. The new DDC system shall provide start/stop scheduling, cycle averaging, and hours of operation averaging, and hours of operation averaging for redundant chilled water pumps, Note: may be a dual arm pumps controlled by a duplex pump controller, pumps do not run concurrently.

C. The control system graphics shall display status for all controlled components’, entering and leaving chilled water temperatures at building, and flow switch status for each pump.

D.

1. Chilled water pump operation shall be initiated based upon actual demand for cooling within the building. First stage cooling shall be economizer when available.

E. Chilled water temperature shall be reset by DDC system based on outside air temperature. Initial chilled water temperature setpoint shall be 42 deg F, at OAT of 80 deg F or above chilled water setpoint shall be 40 deg F.

(24) Air Handling systems Operation

A. General

1. Systems provide heating, cooling, and ventilation. Individual room setpoints are scheduled for 70 deg F heating and 75 deg F cooling, or as directed by PSD No. 1.

2. Status of fans is monitored through current sensors in motor starters. Filter pressure drop is monitored for each filter or filter bank. Alarms are annunciated upon failure of any device and upon filter pressure drop exceeding the setpoint limit.

B. System Occupied to Unoccupied Setback

1. Programmed scheduling: each air-handling unit, fan coil schedule is setup or setback based upon individually programmed occupied and unoccupied times with weekday, weekend and holiday schedules. Optimal Setup/Setback is performed. Interlocks as follows:

a. Exhaust fan(s) in area served by each air handling system are interlocked with the air handling unit supply fan, according to exhaust fan schedule (as applicable).

2. Normal shutdown: Dampers and valves shall be in the following positions (as applicable):

a. outdoor air damper: closed.

b. Return air damper: open.

c. Coil control valves: bypass or closed (as applicable).

3. Safety shut down: the following will cause system fans to shut down, and outside air damper to close:

a. Fire/alarms/smoke detector interlock

b. Freeze protection control.

C. Freeze protection control: Freeze-stat shall shut down the affected unit, close the outside air damper, open the coil control valves to full open or full flow through (as applicable), and start the main chiller and boiler loop heating circulation pumps.

D. Outside Air/IAQ: All air handling equipment shall modulate the damper position based upon the 0-10V signal form the IAQ or CO2 sensors. At a 2-volt output the damper shall be at minimum outside air position during occupied setup periods, and shall modulate open proportionally in response to a further increase in voltage from the device furthest from setpoint, or as selected. The IAQ control routine is overridden to maintain room temperature setpoint, temperature has priority over IAQ.

E. Warm-Up Cycle: Operate air handling unit continuously on 100% return air and on full heat to bring room temperatures up to occupied cycle setpoint.

F. Building Purge: When outside air temperatures are suitable, purge building with 100% outside air (economizer) for 1 hour prior to occupancy.

G. Air Handling Units. System/room temperature control during occupied mode:

1. The economizer controlled automatic dampers and cooling coil control valve shall be modulated in sequence to maintain the cold deck supply air temperature setpoint; initial setpoint of 60 deg F. Reset cold deck temperature and optimize from the room with the highest demand..

2. A low limit control override modulates the outside and return air dampers during economizer operation to prevent cold deck supply air temperature form decreasing below 40 deg F.

3. Override the economizer cycle if any zone is calling for heating.

4. Override the economizer cycle when outside air temperature exceeds return air temperature.

5. Supply air temperatures shall be optimized to minimize return air.

6. The supply and return or exhaust fans shall be equipped with variable frequency drives (VFD). The variable frequency drives shall setup or setback based on the programmed occupancy schedules. The setback fan speed shall be 25% of full speed, the setup fan speed shall be 50% of fan speed. If setpoint duet pressure conditions cannot be maintained the fan speed shall increased sequentially in 10% increments, until setpoint duet pressure can be maintained. The reverse shall occur when setpoint duet pressure is satisfied. Appropriate time delays (adjustable) between control actions shall be built into the control routine to prevent system instability.

(25) Duct free cooling units:

1. Single zone split systems shall maintain setpoint temperatures (76 deg F cooling).

(26) Miscellaneous Exhaust Fans: To be determined.

(2) Scope:

1. Furnish the services of a qualified and approved independent balancing and testing agency to perform the work of this specification section.

2. The work of this section includes, but is not necessarily limited to:

a. Testing and balancing all fans and all air handling systems.

b. Testing and balancing fluid systems.

1) Hydronic heating and cooling systems.

c. Working directly with the mechanical contractor and/or commissioning agent to obtain proper system operation and adjustments.

d. Providing a draft report for review and approval prior to report.

e. Provide final report.

3. The work of this section does not include:

a. Adjusting burners for proper combustion operation.

b. Refrigeration work.

c. Control system adjustments.

(3) Applicable Standards

A. SMACNA Manual for the Balancing an Adjustment of Air Distribution Systems.

B. AMCA Publication 203, Field Performance Measurements.

C. AMCA Standard 300-67, Test Code for Sound Rating.

D. American Air Balancing Council (AABC) Recommended Procedures.

E. National Environmental Balancing Bureau (NEBB) Recommended Procedures.

(4) Qualification of Agency

A. Subcontractor minimum qualifications include:

1. Maintain a complete service organization that has operated within Washington for at least three years prior to bid date of this project.

2. Demonstrate satisfactory completion of five projects of similar size and scope in the State of Washington. Submit references, no exceptions.

3. Bids by suppliers, contractors, or by a firm that does not maintain a full-time staff of active and experienced HVAC systems balancers are not acceptable.

(5) Submittals per Section 1300

A. Submit demonstration of qualifications and obtain Engineer approval prior to star of work.

B. Submit T & B plan, procedures, and forms prior to starting work.

C. Submit Final Report per paragraph 3.8. This is a project closeout requirement.

(6) Timing of Work

A. Do not begin balancing and testing until the systems are completed and in full working order.

B. Schedule the testing and balancing work in cooperation with other trades.

C. Complete the testing and balancing before the date of final project completion.
(7) Contractor Responsibility to Balancing Agency

A. Award the test and balance contract to the approved Testing and Balancing Agency, upon receipt of contract, to allow the Balance and Testing Agency to schedule this work in cooperation with other trades involved and comply with completion date.

B. Place all heating, ventilating air conditioning systems, equipment, and controls into normal full operation for the Testing and Balancing Agency and continue the operation of same during each working day of testing and balancing.

C. Provide scaffolding, ladders, and access to each system for proper testing and balancing.

D. Provide and change pulleys, belts, and dampers, and add any dampers and access doors as required for correct balance, as recommended by the Balancing and Testing Agency or as directed by Mechanical Commissioning Authority and/or after review of draft or final balancing report, at no additional cost.

(8) Instruments

A. Maintain all instruments accurately calibrated and in good working order. Use instruments accurately calibrated and in good working order. Use instruments with the following minimum performance characteristics.

1. Air Velocity Instruments: Direct reading in feet per minute, 2 percent accuracy.

2. Static Pressure Instruments: Direct reading in inches water gauge, 2 percent accuracy.

3. RPM Instruments: Direct reading in revolutions per minute, ½ percent accuracy, or revolution counter accurate within two counts per 100.

4. Temperature Readout: Direct reading in degrees F, plus or minus 1 degree F.

5. Pressure Readout: Direct reading in feet of water of psi, ½ percent accuracy.

6. Water flow instruments: Differential pressure type; direct reading in feet of water of psi, ½ percent accuracy, suitable for readout of balancing valve provided.

7. Sound Measuring Instrument: Octave Band Analyzer, which essentially complies to ANSI Standard 2.14 1971 with a range of 24 db or 150 db sound pressure level reference .0002 microbar. Calibrate sound test instrument before use to a close coupler and a driving loudspeaker that produces a known sound pressure level at the microphone of the analyzer.

(9) General Procedures For All Systems

A. In cooperation with the control contractor or manufacturer’s representative, coordinate adjustments of automatically operated dampers and valves, including the controlling thermostats, to operate as specified, indicated, and/or noted.

B. Use manufacturer’s ratings on all equipment to make required calculations.

C. MAKE FINAL ADJUSTMENTS FOR EACH SPACE PER HEATING OR COOLING COMFORT REQUIREMENTS. State reason for variance from design cfm, i.e., “too noisy”, “too drafty’, etc.

A. Identify each diffuser, grille, and register as to specific location and area.

B. Identify and list size, type, and manufacturer or diffusers, grilles, registers, and all equipment tested.

C. In readings and tests of diffusers, grilles, and registers, include required fpm velocity and test fpm velocity at required cfm and test cfm after adjustments. If test apparatus is designed to read cfm directly, velocity readings may be omitted. Identify test apparatus used. Identify wide open (W.O.) runs.

D. Adjust all diffusers, grilles, and registers to minimize drafts and excess noise in all areas.

E. Maintain relative space-to-space pressure relations implied or stated on drawings.

(11) Balancing Duct Work

A. Analyze system and identify major branches. Tabulate design cfm for each branch.

C. Adjust the other branch dampers or the fan to establish 100% design airflow through the selected branch.

D. Adjust the airflow through each air inlet (exhaust systems) or outlet (supply systems) on the selected branch to within plus or minus five percent or design requirement so that at least one balancing damper serving the inlet (or outlet) is wide open.

E. Proceed to another branch and set up 100% design airflow. Balance each inlet or outlet to within plus or minus five percent of design requirements, again leaving at lest one wide-open run. Repeat this process until all branches are balanced with 100% airflow.

F. Once each branch has been balanced at 100% flow with one wide-open run on each branch, balance with branches together, leaving at lest one branch damper wide open. At this point, adjust the fan delivery so that each branch is at about 100% design airflow. Adjust the branch dampers so that each inlet (or outlet) in the system is within 10% of design airflow.

G. Adjust the fan for design airflow. Plus or minus 5% does not apply here. Coordinate with Section 15850 to replace fan drives if required.

H. Read and record the airflow at each inlet (or outlet).

I. Secure each branch damper and mark the balanced position of the damper quadrant.

(12) Constant Volume Fan and Variable Frequency Drive Equipped Fan Adjustment

A. Balance duct work before making final fan adjustment.

B. Verify that system if free of debris, that inlets and discharges are not obstructed, an that filters are clean.

C. Make pitot traverse of main duct work to determine airflow and record. (Readout airflow measuring systems where provided, in lieu of pilot traverse.)

D. Adjust fan RPM to obtain design airflow. Do not use VFD to adjust fan speed, design airflow shall be achieved by reducing fan speed by adjusting fan sheaves or replacing drive.

E. Test and record motor amperage and voltage for each phase leg. Reduce fan rpm if necessary so that motor running amperage does not exceed motor nameplate amperage. Record final amperage and voltage.

F. Record fan rpm.

G. Test and record fan suction and discharge static pressures.

H. Record airflow.

I. Test and adjust system for minimum design cfm outside air, as shown.

J. Test and record entering air temperatures (db heating and cooling, wb cooling) at coils.

K. Test and record leaving air temperatures (db heating and cooling, wb cooling) at coils.

L. Test and record static pressure drop across each filter and coil except a single reading may be taken across filter or coil banks.

(13) Procedures for Variable-Air-Volume Systems

A. Compensating for Diversity (Verify with Engineer prior to starting work). When the total airflow of all terminal units is more than the indicated airflow of the fan, place a selected number of terminal units at a maximum set-point airflow condition until the total airflow of the terminal units equals the indicated airflow of the fan. Select the reduced airflow terminal units so they are distributed evenly among the branch ducts.

B. Pressure-Independent, Variable-Air-Volume Systems: After the fan systems have been adjusted, adjust the variable-air-volume systems as follows:

1. Set the air handling unit outside-air dampers at minimum and return- and exhaust-air dampers at a position that simulates full-cooling load.

2. Select the terminal unit that is most critical to the supply-fan airflow and static pressure. Measure static pressure. Adjust system static pressure so the entering static pressure for the critical terminal unit is not less than the sum of terminal-unit manufacturer’s recommended minimum inlet static pressure plus the static pressure needed to overcome terminal-unit discharge system losses.

3. Measure total system airflow. Adjust to within indicated airflow.

4. Set terminal units at maximum airflow and adjust controller or regulator to deliver the designed maximum airflow. Use terminal-unit manufacturer’s written instructions to make this adjustment. When total airflow is correct, balance the air outlets downstream from terminal units as described for constant-volume air systems.

6. Remeasure the return airflow to the fan while operating at maximum return airflow and minimum outside airflow. Adjust the fan and balance the return-air ducts and inlets as described for constant-volume air systems.

7. Measure static pressure at the most critical terminal unit and adjust the static pressure controller at the main supply-air sensing station to ensure that adequate static pressure is maintained at the most critical unit.

8. Record the final fan performance data.

(14) Fluid system Testing and Balancing (Systems shall be equipped with automatic flow balancing valves)

A. Preparation of System – Phase One

1. Complete air balance before beginning fluid balance.

2. Clean all strainers.

3. Examine fluid in system to determine if treated and clean.

4. Check pump rotation.

5. Verify expansion tanks are not air bound and system full of fluid.

6. Verify all air vents at high points of fluid system are installed properly and are operating freely. Make certain all air is removed from the circulation system.

7. Open all valves to full flow position, including coil and heater stop valves, close bypass valves, and open return line balancing cocks. Set temperature controls so that automatic valves are open to full flow-through apparatus.

8. Check operation of automatic flow control valve.

B. Test and Balance Procedure – Phase two.

1. Set pumps to proper gpm delivery.

2. Check entering and leaving fluid temperatures and pressure drop through major heat transfer equipment.

3. Check fluid temperatures at inlet side of coils and other heat transfer equipment. Note rise or drop of temperatures from source.

4. Record flow across automatic and manual balancing valves.

5. Set manual bypass valves at 3-way control valves so that bypass loop has a 2 psi grater pressure drop than the full flow through coil path.

C. Test and balance Procedure – Phase Three.

1. Check and record the following items:

a. Entering and leaving fluid and air temperatures at coils and major heat transfer equipment.

b. GPM flow of each coil and major equipment.

c. Pressure drop of each coil and major equipment.

d. Pressure drop across bypass valve.

e. Pump operating suction and discharge pressure and final total developed head.

f. Pump gpm.

g. Rated and actual running amperage and voltage of pump motor.

h. Full nameplate data of all pumps and equipment.

(15) Sound Testing Procedures

A. Provide the following test data for normally occupied space.

1. Measure sound pressure level with all normal equipment on and running. If limit of noise is not exceeded, proceed to next space in question.

2. Measure sound pressure level with all equipment off and room empty of personnel, except test personnel. Keep all doors and windows closed at time of test. This represents the background noise level. Turn all equipment back on.

3. Shut off and stop each unit of noise-making equipment one at a time, and take sound readings before turning off the next unit.

4. Repeat until all units are off and sound level has returned to background level.

5. Note units that exceed specified sound levels, not apparent method of transmission, and makes a recommendation for reducing their sound level to acceptable limits.

6. If noise or vibration is due to balanced condition of system, make adjustments necessary to eliminate problems. Include a brief statement in the report identifying any changes made.

7. Maximum noise level in classrooms is Noise Criteria (NC) 35.

(16) Balancing Report

A. Compile the test data and submit eight copies of the complete test data for forwarding to the Engineer for acceptance and/or analysis and recommendations.

B. Include a complete list of all test equipment used, including apparatus manufacturer’s name, model number, serial number, and date last calibrated.

C. Provide full size scale drawings of the entire facility. Include complete identification of all elements. Identify by box number, room name and number, air outlet symbol, orientation in room, baseboard symbol, etc., to clearly and positively identify the location of each element. Record flowrates, balancing damper position, and static pressures for all ductwork, air-handling equipment and terminal air devices.

D. Include all test data specified in addition to test data recommended in the applicable standards referenced. Tabulate all nameplate data at all balanced equipment and at the associated motors.

E. Tabulate data separately for each system. Describe balancing method used of reach system.

F. Fan data: include 8 1/2x11 minimum, factory performance curves for all fans (AHU, MZ or exhaust). Each curve shall clearly indicate fan rpm at full flow, fan cfm at maximum available horsepower and operating conditions of and at end of balancing procedure (hp, rpm, amps, speed central setting).

G. Include at the front of the report a summary of problems encountered, deviations from design, remaining problems, recommendations, and comments.

Section 15995, Mechanical Commissioning and Support